{"id":1739,"date":"2019-12-11T14:28:51","date_gmt":"2019-12-11T07:28:51","guid":{"rendered":"http:\/\/vafs.gov.vn\/en\/?p=1739"},"modified":"2023-11-23T12:25:29","modified_gmt":"2023-11-23T05:25:29","slug":"special-issue-number-2019","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/en\/2019\/12\/special-issue-number-2019\/","title":{"rendered":"Special Issue Number 2019 (1)"},"content":{"rendered":"

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<\/a><\/a><\/a>T\u1ea0P CH\u00cd KHOA H\u1eccC L\u00c2M NGHI\u1ec6P S\u1ed0 CHUY\u00caN SAN<\/strong> – <\/strong>201<\/strong>9<\/strong><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
1.<\/td>\nVi\u1ec7n Nghi\u00ean c\u1ee9u C\u00f4ng nghi\u1ec7p r\u1eebng 45 n\u0103m x\u00e2y d\u1ef1ng v\u00e0 ph\u00e1t tri\u1ec3n (1974 – 2019)<\/td>\n<\/td>\nNguy\u1ec5n Quang Trung B\u00f9i Duy Ng\u1ecdc
\nNguy\u1ec5n V\u0103n Gi\u00e1p
\nV\u0169 \u0110\u00ecnh Th\u1ecbnh<\/td>\n		3<\/td>\n<\/tr>\n
2.<\/td>\nTi\u00eau ch\u00ed v\u00e0 ph\u01b0\u01a1ng ph\u00e1p x\u00e1c \u0111\u1ecbnh tu\u1ed5i th\u00e0nh th\u1ee5c c\u00f4ng ngh\u1ec7 theo s\u1ea3n ph\u1ea9m c\u1ee7a r\u1eebng tr\u1ed3ng keo lai v\u00e0 Keo tai t\u01b0\u1ee3ng \u1edf
\n\u0110\u00f4ng B\u1eafc B\u1ed9, Trung B\u1ed9 v\u00e0 \u0110\u00f4ng Nam B\u1ed9 – Vi\u1ec7t Nam<\/td>\n		Criteria and methodology
\nto determine\u00a0technology – age of\u00a0Acacia mangium<\/em> and
\nacacia hybrid plantation
\nin\u00a0the Northeast, Central
\nand Southeast Vietnam<\/td>\n		\u0110\u1ed7 V\u0103n B\u1ea3n
\nB\u00f9i H\u1eefu Th\u01b0\u1edfng
\nL\u01b0u Qu\u1ed1c Th\u00e0nh<\/td>\n		15<\/td>\n<\/tr>\n
3.<\/td>\nNghi\u00ean c\u1ee9u s\u1ea3n xu\u1ea5t than Biomass t\u1eeb ph\u1ebf li\u1ec7u ch\u1ebf bi\u1ebfn g\u1ed7<\/td>\nStudy on manufacturing biomass pellets from the waste of wood processing<\/td>\nNguy\u1ec5n V\u0103n \u0110\u1ecbnh
\n\u0110\u1eb7ng \u0110\u1ee9c Vi\u1ec7t
\nNguy\u1ec5n V\u0103n Gi\u00e1p
\nT\u1ea1 Th\u1ecb Thanh H\u01b0\u01a1ng<\/td>\n		26<\/td>\n<\/tr>\n
4.<\/td>\nK\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u c\u00f4ng ngh\u1ec7 che s\u00e1ng di \u0111\u1ed9ng cho c\u00e1c nh\u00e0 \u01b0\u01a1m c\u00e2y gi\u1ed1ng l\u00e2m nghi\u1ec7p<\/td>\nThe results of movabile lighting technology for the nursery house<\/td>\nNguy\u1ec5n V\u0103n Gi\u00e1p
\nL\u00ea Xu\u00e2n Ph\u00fac
\nNguy\u00ea\u0303n Tro\u0323ng Tu\u00e2n
\nCao Chi\u0301 C\u00f4ng
\nNguy\u1ec5n V\u0103n Minh<\/td>\n		38<\/td>\n<\/tr>\n
5.<\/td>\nNghi\u00ean c\u1ee9u thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng thi\u1ebft b\u1ecb th\u00ed nghi\u1ec7m s\u1ea5y g\u1ed7 r\u1eebng tr\u1ed3ng b\u1eb1ng n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi dung t\u00edch 0,5 m3<\/sup><\/td>\nResearch designing the system of testing equipment for forest planting with solar environment 0.5 m3<\/sup><\/td>\nNguy\u1ec5n V\u0103n Gi\u00e1p
\nB\u00f9i Duy Ng\u1ecdc
\nH\u00e0 Ti\u1ebfn M\u1ea1nh
\nL\u00ea Th\u1ecb H\u01b0ng
\nT\u00f4 Qu\u1ed1c Huy<\/td>\n		54<\/td>\n<\/tr>\n
6.<\/td>\n\u0110\u00e1nh gi\u00e1 kh\u1ea3 n\u0103ng s\u1eed d\u1ee5ng g\u1ed7 c\u00e2y Thanh th\u1ea5t (Ailanthus triphysa<\/em> Alston)<\/td>\nAssessment of the possibility
\nin wood utilization of Ailanthus triphysa<\/em> Alston<\/td>\n		Nguy\u1ec5n T\u1eed Kim
\nPh\u1ea1m Th\u1ebf D\u0169ng
\nPh\u1ea1m V\u0103n B\u1ed1n
\nNguy\u1ec5n Th\u1ecb Tr\u1ecbnh Nguy\u1ec5n Tr\u1ecdng Ngh\u0129a<\/td>\n		66<\/td>\n<\/tr>\n
7.<\/td>\nX\u00e1c \u0111\u1ecbnh th\u00f4ng s\u1ed1 c\u00f4ng ngh\u1ec7 s\u1ea5y s\u01a1 b\u1ed9 g\u1ed7 x\u1ebb Keo tai t\u01b0\u1ee3ng (Acacia mangium<\/em>) b\u1eb1ng l\u00f2 s\u1ea5y n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi<\/td>\nInvestigation into the pre – drying procedure for Acacia mangium<\/em> sawn timber in
\nsolar kiln<\/td>\n		H\u00e0 Ti\u1ebfn M\u1ea1nh
\nB\u00f9i Duy Ng\u1ecdc
\n\u0110\u1eb7ng \u0110\u1ee9c Vi\u1ec7t
\nTr\u1ea7n \u0110\u1ee9c Trung<\/td>\n		74<\/td>\n<\/tr>\n
8.<\/td>\nC\u00f4ng ngh\u1ec7 bi\u1ebfn t\u00ednh h\u00f3a nhi\u1ec7t v\u1edbi c\u00e1c h\u1ee3p ch\u1ea5t n-methylol, silicone v\u00e0 d\u1ea7u v\u1ecf h\u1ea1t \u0111i\u1ec1u nh\u1eb1m n\u00e2ng cao \u0111\u1ed9 b\u1ec1n t\u1ef1 nhi\u00ean v\u00e0 gi\u00e1 tr\u1ecb gia t\u0103ng cho c\u00e1c s\u1ea3n ph\u1ea9m v\u00e1n m\u1ecfng v\u00e1n d\u00e1n t\u1eeb
\ng\u1ed7 r\u1eebng tr\u1ed3ng<\/td>\n		Technological research on producing and use of high quality veneer and plywood made of acacia and eucalyptus for export<\/td>\nNguy\u1ec5n H\u1ed3ng Minh
\nNguy\u1ec5n Quang Trung
\nL\u00ea Th\u1ecb H\u01b0ng<\/td>\n		82<\/td>\n<\/tr>\n
9.<\/td>\nInvestigation into UV – driven discolouration of dyed wood veneers<\/td>\nNghi\u00ean c\u1ee9u s\u1ef1 bi\u1ebfn \u0111\u1ed9ng m\u00e0u s\u1eafc c\u1ee7a v\u00e1n nhu\u1ed9m d\u01b0\u1edbi t\u00e1c \u0111\u1ed9ng c\u1ee7a tia c\u1ef1c t\u00edm (UV)<\/td>\nNgoc Bao Nguyen
\nBarbara Ozarska
\nBui Duy Ngoc
\nMacarthur Fergusson and Peter Vinden<\/td>\n		93<\/td>\n<\/tr>\n
10.<\/td>\nNghi\u00ean c\u1ee9u kh\u1ea3 n\u0103ng ph\u00f2ng ch\u1ed1ng n\u1ea5m m\u1ed1c h\u1ea1i g\u1ed7 c\u1ee7a thu\u1ed1c b\u1ea3o qu\u1ea3n Boracol<\/td>\nStudying on the protective effectiveness of wood treated with Boracol preservatves against mold<\/td>\nNguy\u1ec5n Th\u1ecb B\u00edch Ng\u1ecdc
\nB\u00f9i Th\u1ecb Th\u1ee7y
\n\u0110o\u00e0n Th\u1ecb B\u00edch Ng\u1ecdc
\nHo\u00e0ng Th\u1ecb T\u00e1m
\nNguy\u1ec5n Th\u1ecb H\u1eb1ng
\nB\u00f9i V\u0103n \u00c1i
\nNguy\u1ec5n V\u0103n \u0110\u1ee9c<\/td>\n		106<\/td>\n<\/tr>\n
11.<\/td>\nNghi\u00ean c\u1ee9u kh\u1ea3 n\u0103ng ph\u00f2ng ch\u1ed1ng n\u1ea5m m\u1ee5c h\u1ea1i g\u1ed7 c\u1ee7a thu\u1ed1c b\u1ea3o qu\u1ea3n d\u1ea1ng Boracol<\/td>\nStudying on the protective effectiveness of wood treated with Boracol preservatves against wood destroying basidiomycetes<\/td>\nNguy\u1ec5n Th\u1ecb B\u00edch Ng\u1ecdc
\nB\u00f9i Th\u1ecb Th\u1ee7y
\nB\u00f9i V\u0103n \u00c1i
\nNguy\u1ec5n V\u0103n \u0110\u1ee9c
\n\u0110o\u00e0n Th\u1ecb B\u00edch Ng\u1ecdc
\nHo\u00e0ng Th\u1ecb T\u00e1m
\nNguy\u1ec5n Th\u1ecb H\u1eb1ng,<\/td>\n		114<\/td>\n<\/tr>\n
12.<\/td>\nHi\u1ec7u l\u1ef1c ph\u00f2ng m\u1ed1i g\u00e2y h\u1ea1i l\u00e2m s\u1ea3n c\u1ee7a thu\u1ed1c b\u1ea3o qu\u1ea3n g\u1ed7 d\u1ea1ng Boracol<\/td>\nEffects on Termite of wood treated by Boracol wood preservativer<\/td>\nNguy\u1ec5n Th\u1ecb B\u00edch Ng\u1ecdc
\nHo\u00e0ng Th\u1ecb T\u00e1m
\nB\u00f9i V\u0103n \u00c1i
\nNguy\u1ec5n V\u0103n \u0110\u1ee9c Nguy\u1ec5n Th\u1ecb H\u1eb1ng
\n\u0110o\u00e0n Th\u1ecb B\u00edch Ng\u1ecdc
\nB\u00f9i Th\u1ecb Th\u1ee7y<\/td>\n		121<\/td>\n<\/tr>\n
13.<\/td>\nNghi\u00ean c\u1ee9u di\u1ec5n bi\u1ebfn c\u01b0\u1eddng \u0111\u1ed9 b\u1ee9c x\u1ea1 m\u1eb7t tr\u1eddi t\u1ea1i B\u00ecnh \u0110\u1ecbnh ph\u1ee5c v\u1ee5 s\u1ea5y g\u1ed7 r\u1eebng tr\u1ed3ng<\/td>\nInvestigation intothesolar radiation cycle in Binh Dinh for wood drying<\/td>\nB\u00f9i Duy Ng\u1ecdc
\nL\u00ea Xu\u00e2n Ph\u00fac
\nNguy\u1ec5n V\u0103n Gi\u00e1p
\nL\u00ea Th\u1ecb H\u01b0ng<\/td>\n		129<\/td>\n<\/tr>\n
14.<\/td>\n\u1ea2nh h\u01b0\u1edfng c\u1ee7a Plasma \u0111\u1ebfn b\u1ec1 m\u1eb7t v\u00e1n b\u00f3c g\u1ed7 d\u01b0\u01a1ng sau khi s\u1ea5y \u1edf nhi\u1ec7t \u0111\u1ed9 cao<\/td>\nEffect of Plasma treatment on surface roughness of Poplar veneer after drying at high temperature<\/td>\nNguy\u1ec5n Th\u1ecb Ph\u01b0\u1ee3ng
\nV\u0169 \u0110\u00ecnh Th\u1ecbnh<\/td>\n		138<\/td>\n<\/tr>\n
15.<\/td>\n\u0110\u00e1nh gi\u00e1 ph\u01b0\u01a1ng ph\u00e1p b\u1ea3o t\u1ed3n g\u1ed7 kh\u1ea3o c\u1ed5 ng\u1eadp n\u01b0\u1edbc b\u1eb1ng colophan v\u00e0 polyethylene glycol<\/td>\nConservation of historical wood using colophony and polyethylene glycol<\/td>\nNguy\u1ec5n \u0110\u1ee9c Th\u00e0nh
\nB\u00f9i Duy Ng\u1ecdc
\nNguy\u1ec5n Th\u1ecb B\u00edch Ng\u1ecdc<\/td>\n		148<\/td>\n<\/tr>\n
16.<\/td>\nNghi\u00ean c\u1ee9u c\u00e1c b\u01b0\u1edbc c\u00f4ng ngh\u1ec7 t\u1ea1o s\u1ea3n ph\u1ea9m tre \u00e9p kh\u1ed1i l\u00e0m v\u1eadt li\u1ec7u x\u00e2y d\u1ef1ng<\/td>\nResearch technology steps to create bamboo products for building materials<\/td>\nNguy\u1ec5n Quang Trung
\nNguy\u1ec5n Th\u1ecb Ph\u01b0\u1ee3ng
\nPh\u1ea1m Th\u1ecb Thanh Mi\u1ec1n<\/td>\n		157<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>TI\u00caU CH\u00cd V\u00c0 PH\u01af\u01a0NG PH\u00c1P X\u00c1C \u0110\u1ecaNH TU\u1ed4I TH\u00c0NH TH\u1ee4C C\u00d4NG NGH\u1ec6 THEO S\u1ea2N PH\u1ea8M C\u1ee6A R\u1eeaNG TR\u1ed2NG KEO LAI V\u00c0 KEO TAI T\u01af\u1ee2NG \u1ede \u0110\u00d4NG B\u1eaeC B\u1ed8, TRUNG B\u1ed8 V\u00c0 \u0110\u00d4NG NAM B\u1ed8 – VI\u1ec6T NAM<\/p>\n

<\/a>\u0110\u1ed7 V\u0103n B\u1ea3n, B\u00f9i H\u1eefu Th\u01b0\u1edfng, L\u01b0u Qu\u1ed1c Th\u00e0nh<\/p>\n

Vi\u1ec7n Nghi\u00ean c\u1ee9u C\u00f4ng nghi\u1ec7p r\u1eebng<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Keo lai (Acacia hybrid = A. mangium<\/em> \u00b4 A. auriculiformis<\/em>) v\u00e0 Keo tai t\u01b0\u1ee3ng (Acacia mangium<\/em>) l\u00e0 nh\u1eefng lo\u00e0i c\u00e2y tr\u1ed3ng r\u1eebng ch\u1ee7 l\u1ef1c \u1edf Vi\u1ec7t Nam. S\u1ea3n ph\u1ea9m r\u1eebng tr\u1ed3ng l\u00e0 g\u1ed7 nguy\u00ean li\u1ec7u, khi mua b\u00e1n, s\u1eed d\u1ee5ng hay ch\u1ebf bi\u1ebfn ng\u01b0\u1eddi ta ch\u1ec9 quan t\u00e2m \u0111\u1ebfn k\u00edch th\u01b0\u1edbc. G\u1ed7 \u0111\u1ec3 l\u00e0m \u0111\u1ed3 m\u1ed9c c\u00f3 chi\u1ec1u d\u00e0i t\u1ed1i thi\u1ec3u 2 m, \u0111\u01b0\u1eddng k\u00ednh \u0111\u1ea7u nh\u1ecf kh\u00f4ng v\u1ecf t\u1eeb 15 cm tr\u1edf l\u00ean; g\u1ed7 \u0111\u1ec3 s\u1ea3n xu\u1ea5t v\u00e1n gh\u00e9p thanh, \u0111\u1ec3 b\u00f3c c\u1ea7n chi\u1ec1u d\u00e0i t\u1ed1i thi\u1ec3u 1 m ho\u1eb7c 1,3 m, \u0111\u01b0\u1eddng k\u00ednh t\u1eeb 10 \u0111\u1ebfn 15 cm v\u00e0 g\u1ed7 \u0111\u1ec3 b\u0103m d\u0103m c\u1ea7n \u0111\u01b0\u1eddng k\u00ednh t\u1eeb 5 \u0111\u1ebfn 10 cm. K\u00edch th\u01b0\u1edbc s\u1ea3n ph\u1ea9m l\u00e0 c\u01a1 s\u1edf \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh tu\u1ed5i th\u00e0nh th\u1ee5c c\u00f4ng ngh\u1ec7 theo s\u1ea3n ph\u1ea9m. C\u00e2y g\u1ed7 \u0111\u1ea1t tu\u1ed5i th\u00e0nh th\u1ee5c c\u00f4ng ngh\u1ec7 khi t\u1ea1o \u0111\u01b0\u1ee3c t\u1ed1i thi\u1ec3u 1 kh\u00fac c\u00f3 k\u00edch th\u01b0\u1edbc theo y\u00eau c\u1ea7u c\u1ee7a s\u1ea3n ph\u1ea9m. Tu\u1ed5i th\u00e0nh th\u1ee5c c\u00f4ng ngh\u1ec7 c\u1ee7a r\u1eebng tr\u1ed3ng \u0111\u1ea1t \u0111\u01b0\u1ee3c khi l\u01b0\u1ee3ng t\u0103ng tr\u01b0\u1edfng b\u00ecnh qu\u00e2n c\u1ee7a s\u1ea3n ph\u1ea9m m\u1ee5c \u0111\u00edch \u0111\u1ea1t cao nh\u1ea5t. \u0110\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c tu\u1ed5i th\u00e0nh th\u1ee5c c\u00f4ng ngh\u1ec7 cho r\u1eebng tr\u1ed3ng c\u1ea7n ph\u1ea3i ti\u1ebfn h\u00e0nh l\u1eadp \u00f4 ti\u00eau chu\u1ea9n, gi\u1ea3i t\u00edch c\u00e2y \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c l\u01b0\u1ee3ng t\u0103ng tr\u01b0\u1edfng tr\u1eef l\u01b0\u1ee3ng c\u1ee7a c\u00e1c s\u1ea3n ph\u1ea9m th\u00f4ng qua c\u00e1c h\u00e0m t\u01b0\u01a1ng quan. Kh\u1ea3o s\u00e1t c\u00e1c m\u00f4 h\u00ecnh r\u1eebng tr\u1ed3ng keo lai v\u00e0 Keo tai t\u01b0\u1ee3ng \u1edf 14 t\u1ec9nh trong 3 v\u00f9ng \u0110\u00f4ng B\u1eafc B\u1ed9, Trung B\u1ed9 v\u00e0 \u0110\u00f4ng Nam B\u1ed9 v\u1edbi v\u1edbi t\u1ed5ng s\u1ed1 192 \u00f4 ti\u00eau chu\u1ea9n \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp v\u00e0 576 c\u00e2y g\u1ed7 \u0111\u1ec3 gi\u1ea3i t\u00edch \u0111\u00e3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c tu\u1ed5i th\u00e0nh th\u1ee5c c\u00f4ng ngh\u1ec7 theo s\u1ea3n ph\u1ea9m cho t\u1eebng m\u00f4 h\u00ecnh theo c\u1ea5p \u0111\u1ea5t. Tuy nhi\u00ean, k\u1ebft qu\u1ea3 n\u00e0y ch\u1ec9 gi\u1edbi h\u1ea1n \u1edf m\u1ee9c \u0111\u1ed9 ph\u1ea3n \u00e1nh ch\u00ednh m\u00f4 h\u00ecnh c\u1ee5 th\u1ec3 do tr\u00ean th\u1ef1c t\u1ebf r\u1eebng tr\u1ed3ng kh\u00f4ng \u0111\u1ed3ng nh\u1ea5t v\u1ec1 \u0111i\u1ec1u ki\u1ec7n sinh th\u00e1i, ngu\u1ed3n gi\u1ed1ng, m\u1eadt \u0111\u1ed9 tr\u1ed3ng, k\u1ef9 thu\u1eadt l\u00e2m sinh.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Keo lai, Keo tai t\u01b0\u1ee3ng, k\u00edch th\u01b0\u1edbc s\u1ea3n ph\u1ea9m, th\u00e0nh th\u1ee5c c\u00f4ng ngh\u1ec7<\/td>\n<\/tr>\n

\n

<\/a>Criteria and methodology to determine\u00a0technology – age of\u00a0Acacia mangium<\/em> and acacia hybrid plantation in\u00a0the Northeast, Central and Southeast Vietnam<\/strong><\/p>\n

Acacia hybrid (Acacia hybrid = A. mangium<\/em> \u00b4 A. auriculiformis<\/em>) and Acacia mangium<\/em> (Acacia mangium<\/em>) are the popular forest plantation tree species in Vietnam. Products of plantation forest are wood raw materials when buying, using, or processing, people only care about the dimension. The funiture raw material need a minimum length is 2 meters and their diameter with no bark at least 15 cm; the wood raw material to produce laminated need a minimum length from 1 meter to 1.3 meter and their diameter from 10 cm to 15 cm; the wood raw material to produce plywood need diameter from 5 cm to 10 cm. Product dimension is the basis for determining the age of technological maturity. The tree reach the technical maturity when they get at least one log required the product need. The age of plantation forest achivement technical maturity when the average growth rate of the target product is highest. In order to determine the age of technological maturity for plantation, it is necessary to establish a standard plot, to analyze the trees to determine the volume of growth of products through correlation functions. The technology maturity has been determined based on the product dimension and the soil level through the survey of A. hybrid<\/em> and A. mangium<\/em> plantation models in 14 provinces in the North East, Central and Southeast regions in Vietnam including 192 standard plots and 576 trees identified for analysis. However, this result is only limited to the level of reflection in the survey specific models because in reality, the plantation forests are not identical in terms of ecological conditions, seed sources, density and silvicultural techniques.<\/p>\n

Keywords:<\/em><\/strong> Acacia hybrid, Acacia mangium<\/em>, product dimension, technical maturity<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U S\u1ea2N XU\u1ea4T THAN BIOMASS T\u1eea PH\u1ebe LI\u1ec6U CH\u1ebe BI\u1ebeN G\u1ed6<\/p>\n

<\/a>Nguy\u1ec5n V\u0103n \u0110\u1ecbnh, \u0110\u1eb7ng \u0110\u1ee9c Vi\u1ec7t, Nguy\u1ec5n V\u0103n Gi\u00e1p, T\u1ea1 Th\u1ecb Thanh H\u01b0\u01a1ng<\/p>\n

Vi\u1ec7n Nghi\u00ean c\u1ee9u C\u00f4ng nghi\u1ec7p r\u1eebng<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Nghi\u00ean c\u1ee9u s\u1eed d\u1ee5ng ngu\u1ed3n ph\u1ebf li\u1ec7u t\u1eeb ch\u1ebf bi\u1ebfn g\u1ed7 \u0111\u1ec3 t\u1ea1o vi\u00ean than Biomass thay th\u1ebf than t\u1ed5 ong l\u00e0 r\u1ea5t c\u1ea7n thi\u1ebft kh\u00f4ng nh\u1eefng mang l\u1ea1i hi\u1ec7u qu\u1ea3 kinh t\u1ebf, m\u00e0 c\u00f2n g\u00f3p ph\u1ea7n gi\u1ea3m thi\u1ec3u \u00f4 nhi\u1ec5m m\u00f4i tr\u01b0\u1eddng v\u00e0 t\u0103ng hi\u1ec7u qu\u1ea3 s\u1eed d\u1ee5ng ngu\u1ed3n ph\u1ebf li\u1ec7u. K\u1ebft qu\u1ea3 \u0111\u1ea1t \u0111\u01b0\u1ee3c c\u1ee7a \u0111\u1ec1 t\u00e0i: X\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c c\u00e1c y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng v\u00e0 th\u00f4ng s\u1ed1 c\u00f4ng ngh\u1ec7 (\u00e1p l\u1ef1c \u00e9p P, nhi\u1ec7t \u0111\u1ed9 \u00e9p t v\u00e0 th\u1eddi gian \u00e9p T) t\u1ed1i \u01b0u khi \u00e9p vi\u00ean than Biomass t\u1eeb ph\u1ebf li\u1ec7u g\u1ed7. Thi\u1ebft k\u1ebf v\u00e0 ch\u1ebf t\u1ea1o m\u00e1y \u00e9p \u0111\u00f9n b\u1eb1ng tr\u1ee5c v\u00edt xo\u1eafn ph\u1ee5c v\u1ee5 s\u1ea3n xu\u1ea5t than Biomass (c\u00f4ng su\u1ea5t \u0111\u1ed9ng c\u01a1 18 kW, n\u0103ng su\u1ea5t 250 kg\/h). K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u n\u00e0y s\u1ebd g\u00f3p ph\u1ea7n ho\u00e0n thi\u1ec7n c\u00f4ng ngh\u1ec7 s\u1ea3n xu\u1ea5t vi\u00ean than Biomass t\u1eeb ph\u1ebf li\u1ec7u c\u1ee7a ng\u00e0nh ch\u1ebf bi\u1ebfn g\u1ed7.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Vi\u00ean than Biomass, m\u00e1y \u00e9p vi\u00ean, m\u00f9n c\u01b0a<\/td>\n<\/tr>\n

\n

<\/a>Study on manufacturing biomass pellets from the waste of wood processing<\/strong><\/p>\n

Researching on the use of wood processing scrap sources to create Biomass coal pellets to replace honeycomb coal is essential but not only economical, but it also contributes to reduce environmental pollution and increase the efficiency of using resources scrap. Result of the research: Determining the influencing factors and technological parameters (P – pressure of pressing, t – press temperature, and T – molding time) are optimal when pressing Biomass coal pellets from wood scraps. Design and manufacture of screw – screw extruders for Biomass pellet production (motor power 18 kW, the yield of 250 kg\/h). The result of this research will contribute to accomplish technology for processing Biomass pellet.<\/p>\n

Keywords:<\/em><\/strong> Biomass pellet, wood pellet presses, sawdust<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>K\u1ebeT QU\u1ea2 NGHI\u00caN C\u1ee8U C\u00d4NG NGH\u1ec6 CHE S\u00c1NG DI \u0110\u00d4\u0323NG CHO C\u00c1C NH\u00c0 \u01af\u01a0M C\u00c2Y GI\u1ed0NG L\u00c2M NGHI\u1ec6P<\/p>\n

<\/a>Nguy\u1ec5n V\u0103n Gi\u00e1p1<\/sup>, L\u00ea Xu\u00e2n Ph\u00fac1<\/sup>, Nguy\u00ea\u0303n Tro\u0323ng Tu\u00e2n1<\/sup>, Cao Chi\u0301 C\u00f4ng1<\/sup>,
\nNguy\u1ec5n V\u0103n Minh2<\/sup><\/p>\n

1 <\/sup>Vi\u1ec7n Nghi\u00ean c\u1ee9u C\u00f4ng nghi\u1ec7p r\u1eebng
\n2 <\/sup>Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Ca\u0301c nha\u0300 \u01b0\u01a1m c\u00e2y gi\u00f4\u0301ng l\u00e2m nghi\u00ea\u0323p hi\u00ea\u0323n co\u0301 trong n\u01b0\u01a1\u0301c v\u01a1\u0301i h\u00ea\u0323 th\u00f4\u0301ng che sa\u0301ng c\u00f4\u0301 \u0111i\u0323nh kh\u00f3 \u0111i\u00ea\u0300u ti\u00ea\u0301t \u0111\u01b0\u01a1\u0323c a\u0301nh sa\u0301ng trong m\u00f4i tr\u01b0\u01a1\u0300ng nh\u00e2n gi\u00f4\u0301ng n\u00ean chi\u0309 s\u01b0\u0309 du\u0323ng \u0111\u01b0\u01a1\u0323c trong giai \u0111oa\u0323n co\u0301 khi\u0301 h\u00e2\u0323u th\u01a1\u0300i ti\u00ea\u0301t thu\u1eadn l\u1ee3i (co\u0301 n\u0103\u0301ng nhi\u00ea\u0300u nh\u01b0ng i\u0301t no\u0301ng, kh\u00f4ng la\u0323nh). C\u00e1c nh\u00e0 k\u00ednh, nha\u0300 ma\u0300ng nh\u00e2\u0323p n\u00f4\u0323i co\u0301 k\u00ea\u0301t c\u00e2\u0301u kh\u00f4ng phu\u0300 h\u01a1\u0323p v\u01a1\u0301i c\u00f4ng ngh\u00ea\u0323 nh\u00e2n gi\u00f4\u0301ng c\u00e2y l\u00e2m nghi\u00ea\u0323p trong \u0111i\u00ea\u0300u ki\u00ea\u0323n sa\u0309n xu\u00e2\u0301t Vi\u00ea\u0323t Nam, gia\u0301 tha\u0300nh cao, chi phi\u0301 sa\u0309n xu\u00e2\u0301t l\u01a1\u0301n va\u0300 bi\u0323 hi\u00ea\u0323u \u01b0\u0301ng nha\u0300 ki\u0301nh r\u00e2\u0301t ma\u0323nh n\u00ean hi\u00ea\u0323u qua\u0309 s\u01b0\u0309 du\u0323ng th\u00e2\u0301p. C\u00f4ng ngh\u1ec7 che s\u00e1ng di \u0111\u1ed9ng \u0111\u01b0\u01a1\u0323c nghi\u00ean c\u01b0\u0301u m\u01a1\u0301i cho nh\u00e0 \u01b0\u01a1m c\u00e2y gi\u1ed1ng l\u00e2m n\u00f4ng nghi\u1ec7p \u01a1\u0309 vu\u0300ng nhi\u00ea\u0323t \u0111\u01a1\u0301i co\u0301 mu\u0300a \u0111\u00f4ng la\u0323nh, \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng v\u00e0o s\u1ea3n xu\u1ea5t, \u0111\u1ea3m b\u1ea3o ph\u00f9 h\u1ee3p \u0111i\u1ec1u ki\u1ec7n l\u00e2m nghi\u1ec7p \u1edf n\u01b0\u1edbc ta, ho\u1ea1t \u0111\u1ed9ng t\u1ed1t trong ca\u0309 giai \u0111o\u1ea1n kh\u00ed h\u1eadu, th\u1eddi ti\u1ebft kh\u1eafc nghi\u1ec7t nh\u1ea5t do t\u00e1c \u0111\u1ed9ng m\u1ea1nh c\u1ee7a gi\u00f3 L\u00e0o v\u00e0 gi\u00f3 m\u00f9a \u0110\u00f4ng B\u1eafc. Nh\u00e0 gi\u00e2m hom c\u1ea3i ti\u1ebfn v\u1edbi h\u1ec7 th\u1ed1ng che s\u00e1ng di \u0111\u1ed9ng, \u0111i\u1ec1u khi\u1ec3n t\u1ef1 \u0111\u1ed9ng, b\u00e1n t\u1ef1 \u0111\u1ed9ng c\u00f3 kh\u1ea3 n\u0103ng \u0111i\u1ec1u ti\u1ebft MTGH, n\u00e2ng cao hi\u1ec7u qu\u1ea3 s\u1eed d\u1ee5ng, c\u00f3 th\u1ec3 s\u1ea3n xu\u1ea5t c\u00e2y gi\u1ed1ng \u1edf c\u1ea3 12 th\u00e1ng trong n\u0103m, t\u1ef7 l\u1ec7 s\u1ed1ng \u0111\u1ea1t h\u01a1n 90% cao h\u01a1n so v\u1edbi c\u00e1c nh\u00e0 \u01b0\u01a1m c\u00e2y gi\u1ed1ng th\u00f4ng d\u1ee5ng.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> C\u00f4ng ngh\u1ec7 che s\u00e1ng di \u0111\u1ed9ng, h\u00ea\u0323 th\u00f4\u0301ng \u0111i\u00ea\u0300u khi\u00ea\u0309n ba\u0301n t\u01b0\u0323 \u0111\u00f4\u0323ng va\u0300 t\u01b0\u0323 \u0111\u00f4\u0323ng che sa\u0301ng, nh\u00e0 \u01b0\u01a1m c\u00e2y gi\u1ed1ng c\u1ea3i ti\u1ebfn<\/td>\n<\/tr>\n

\n

<\/a>The results of movabile lighting technology for the nursery house<\/strong><\/p>\n

Existing domestic seedling nurseries with fixed shade systems find it difficult to regulate the light in the propagating environment, so they can only be used in favorable weather climates (there is a lot of sunshine but little hot, not cold). Imported greenhouses and greenhouses are not suitable for forest breeding technology in Vietnamese production conditions, high prices, large production costs and strong greenhouse effect. Very low use. New mobile shading technology has been newly researched for nurseries for agricultural forestry seedlings in tropical areas with cold winters, applied in production, ensuring appropriate forestry conditions in our country and operating well in During the whole climatic period, the weather is the most severe due to the strong impacts of Lao winds and northeast monsoon. Improved cuttings with a mobile shade system, automatic control, semi – automatic ability to regulate the propagating environment, improve use efficiency: can produce seedlings at all 12 months of the year, the rate of the survival rate is 90% higher than that of conventional nursery nurseries.<\/p>\n

Keywords:<\/em><\/strong> Movabile light – shielding technology, semi – automatic and automatic light control system, improved seedling nursery<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U THI\u1ebeT K\u1ebe H\u1ec6 TH\u1ed0NG THI\u1ebeT B\u1eca TH\u00cd NGHI\u1ec6M S\u1ea4Y G\u1ed6 R\u1eeaNG TR\u1ed2NG B\u1eb0NG N\u0102NG L\u01af\u1ee2NG M\u1eb6T TR\u1edcI DUNG T\u00cdCH 0,5 M3<\/sup><\/p>\n

<\/a>Nguy\u1ec5n V\u0103n Gi\u00e1p1<\/sup>, B\u00f9i Duy Ng\u1ecdc1<\/sup>, H\u00e0 Ti\u1ebfn M\u1ea1nh1<\/sup>, L\u00ea Th\u1ecb H\u01b0ng1<\/sup>, T\u00f4 Qu\u1ed1c Huy2<\/sup><\/p>\n

1 <\/sup>Vi\u1ec7n Nghi\u00ean c\u1ee9u C\u00f4ng nghi\u1ec7p r\u1eebng
\n2<\/sup> Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

\u1ee8ng d\u1ee5ng n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi (Solar Energy) trong s\u1ea5y g\u1ed7 \u1edf giai \u0111o\u1ea1n ti\u1ec1n s\u1ea5y l\u00e0 m\u1ed9t h\u01b0\u1edbng \u0111i m\u1edbi, nh\u1eb1m ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng, gi\u1ea3m \u0111\u00e1ng k\u1ec3 th\u1eddi gian s\u1ea5y trong l\u00f2, gi\u1ea3m thi\u1ec3u \u00f4 nhi\u1ec5m m\u00f4i tr\u01b0\u1eddng, t\u0103ng ch\u1ea5t l\u01b0\u1ee3ng g\u1ed7 s\u1ea5y, \u0111\u1eb7c bi\u1ec7t \u0111\u1ed1i v\u1edbi c\u00e1c lo\u1ea1i g\u1ed7 kh\u00f3 s\u1ea5y v\u00e0 g\u1ed7 c\u00f3 chi\u1ec1u d\u00e0y l\u1edbn. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u thi\u1ebft k\u1ebf, ch\u1ebf t\u1ea1o v\u00e0 th\u1eed nghi\u1ec7m h\u1ec7 th\u1ed1ng thi\u1ebft b\u1ecb s\u1ea5y g\u1ed7 r\u1eebng tr\u1ed3ng b\u1eb1ng n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi (NLMT) c\u00f3 k\u1ebft h\u1ee3p v\u1edbi h\u1ec7 th\u1ed1ng c\u1ea5p b\u00f9 nhi\u1ec7t b\u1eb1ng b\u01a1m nhi\u1ec7t, thi\u1ebft b\u1ecb s\u1ea5y g\u1ed7 th\u00ed nghi\u1ec7m c\u00f3 k\u00edch th\u01b0\u1edbc (2,15 \u00b4 2,26 \u00b4 1,56) m, c\u00f4ng su\u1ea5t 0,5 m3<\/sup>\/m\u1ebb, nhi\u1ec7t \u0111\u1ed9 s\u1ea5y max kho\u1ea3ng 70o<\/sup>C. Thi\u1ebft b\u1ecb s\u1ea5y g\u1ed7 r\u1eebng tr\u1ed3ng \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf s\u1eed d\u1ee5ng NLMT l\u00e0 t\u00e1c nh\u00e2n s\u1ea5y ch\u00ednh, h\u1ec7 th\u1ed1ng c\u1ea5p b\u00f9 nhi\u1ec7t ch\u1ec9 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong tr\u01b0\u1eddng h\u1ee3p th\u1eddi ti\u1ebft kh\u00f4ng c\u00f3 n\u1eafng ho\u1eb7c v\u00e0o ban \u0111\u00eam nh\u1eb1m \u0111\u1ea3m b\u1ea3o s\u1ef1 ho\u1ea1t \u0111\u1ed9ng li\u00ean t\u1ee5c c\u1ee7a thi\u1ebft b\u1ecb trong \u0111i\u1ec1u ki\u1ec7n th\u1eddi ti\u1ebft \u0111\u1eb7c tr\u01b0ng. K\u1ebft qu\u1ea3 s\u1ea5y th\u1eed nghi\u1ec7m cho keo lai tr\u00ean h\u1ec7 th\u1ed1ng thi\u1ebft b\u1ecb s\u1ea5y cho th\u1ea5y v\u1edbi ch\u1ebf \u0111\u1ed9 s\u1ea5y U = 3,2 th\u00ec thu \u0111\u01b0\u1ee3c th\u1eddi gian s\u1ea5y g\u1ed7 l\u00e0 ng\u1eafn nh\u1ea5t (kho\u1ea3ng 22 ng\u00e0y) v\u1edbi \u0111\u1ed9 \u1ea9m s\u1ea5y y\u00eau c\u1ea7u l\u00e0 30% v\u00e0 t\u1ef7 l\u1ec7 khuy\u1ebft t\u1eadt trong kho\u1ea3ng (0,5 – 0,7)%. H\u1ec7 th\u1ed1ng thi\u1ebft b\u1ecb s\u1ea5y g\u1ed7 b\u1eb1ng NLMT \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf ch\u1ebf t\u1ea1o \u0111\u00e1p \u1ee9ng t\u1ed1t c\u00e1c y\u00eau c\u1ea7u k\u1ef9 thu\u1eadt v\u1ec1 s\u1ea5y g\u1ed7 x\u1ebb r\u1eebng tr\u1ed3ng \u1edf Vi\u1ec7t Nam.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> S\u1ea5y g\u1ed7, n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi, s\u1ea5y g\u1ed7 b\u1eb1ng n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi<\/td>\n<\/tr>\n

\n

<\/a>Research designing the system of testing equipment for forest planting with solar environment 0.5 m3<\/sup><\/strong><\/p>\n

Application of solar energy in wood drying in the pre – drying stage is a new direction, to save energy, significantly reduce drying time in the oven, minimize environmental pollution, increase wood quality. Drying, especially for hard – to – dry and thick – dense timbers. Results of research, design, manufacture and testing of a system of solar wood drying equipment by solar energy (solar energy) combined with heat pump compensation and heat treatment system, laboratory equipment with size (2.15 \u00b4 2.26 \u00b4 1.56) m, capacity of 0.5m3<\/sup>\/batch, max drying temperature of about 70o<\/sup>C. Plantation wood drying equipment is designed to use solar energy as the main drying agent, heat – compensating system is only used in case the weather is not sunny or at night to ensure the continuous operation of the equipment in typical weather conditions. Test drying results for acacia hybrid on the drying equipment system showed that with drying mode U = 3.2, the wood drying time was the shortest (about 22 days) with the required drying humidity of 30% and the disability rate is within (0.5 – 0.7%). The system of solar energy drying equipment is designed and manufactured to meet the technical requirements of drying sawn timber in Vietnam.<\/p>\n

Keywords:<\/em><\/strong> Wood drying, solar energy, solar wood drying<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>\u0110\u00c1NH GI\u00c1 KH\u1ea2 N\u0102NG S\u1eec D\u1ee4NG G\u1ed6 C\u00c2Y THANH TH\u1ea4T (Ailanthus triphysa<\/em> Alston)<\/p>\n

<\/a>Nguy\u1ec5n T\u1eed Kim1<\/sup>, Ph\u1ea1m Th\u1ebf D\u0169ng2<\/sup>, Ph\u1ea1m V\u0103n B\u1ed1n2<\/sup>,
\nNguy\u1ec5n Th\u1ecb Tr\u1ecbnh1<\/sup>, \u00a0Nguy\u1ec5n Tr\u1ecdng Ngh\u0129a1<\/sup><\/p>\n

1<\/sup> Vi\u1ec7n Nghi\u00ean c\u1ee9u C\u00f4ng nghi\u1ec7p r\u1eebng
\n2<\/sup> Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Nam B\u1ed9<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Thanh th\u1ea5t (Ailanthus triphysa <\/em>(Dennst) Alston) \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn l\u00e0 lo\u00e0i c\u00e2y g\u1ed7 sinh tr\u01b0\u1edfng nhanh, th\u00edch \u1ee9ng v\u1edbi nhi\u1ec1u v\u00f9ng sinh th\u00e1i kh\u00e1c nhau \u1edf Vi\u1ec7t Nam. G\u1ed7 Thanh th\u1ea5t m\u1ec1m, th\u1edb m\u1ecbn v\u00e0 th\u1eb3ng, d\u1ec5 gia c\u00f4ng ch\u1ebf bi\u1ebfn, d\u1ec5 b\u00f3c v\u1ecf v\u00e0 d\u1ec5 ch\u00e1y, c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng v\u00e0o c\u00f4ng nghi\u1ec7p s\u1ea3n xu\u1ea5t di\u00eam. Nghi\u00ean c\u1ee9u m\u1ed9t s\u1ed1 t\u00ednh ch\u1ea5t v\u1eadt l\u00fd, c\u01a1 h\u1ecdc g\u1ed7 Thanh th\u1ea5t g\u00f3p ph\u1ea7n cung c\u1ea5p c\u01a1 s\u1edf khoa h\u1ecdc cho vi\u1ec7c s\u1eed d\u1ee5ng lo\u00e0i c\u00e2y n\u00e0y. K\u1ebft qu\u1ea3 cho th\u1ea5y g\u1ed7 Thanh th\u1ea5t c\u00f3 nhi\u1ec1u t\u00ednh ch\u1ea5t v\u1eadt l\u00fd, c\u01a1 h\u1ecdc th\u1ea5p (kh\u1ed1i l\u01b0\u1ee3ng th\u1ec3 t\u00edch 0,37 g\/cm3<\/sup>, h\u1ec7 s\u1ed1 co r\u00fat th\u1ec3 t\u00edch 0,55, \u0111\u1ed9 b\u1ec1n n\u00e9n d\u1ecdc th\u1edb 23,8 MPa, \u0111\u1ed9 b\u1ec1n khi u\u1ed1n t\u0129nh 46,5 MPa, \u0111\u1ed9 b\u1ec1n u\u1ed1n va \u0111\u1eadp 37,2 kJ\/m2<\/sup>) n\u00ean c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng g\u1ed7 cho nh\u1eefng m\u1ee5c \u0111\u00edch kh\u00f4ng \u0111\u00f2i h\u1ecfi ch\u1ecbu l\u1ef1c, t\u01b0\u01a1ng \u0111\u1ed1i ph\u00f9 h\u1ee3p cho m\u1ee5c \u0111\u00edch l\u00e0m nguy\u00ean li\u1ec7u s\u1ea3n xu\u1ea5t v\u00e1n b\u00f3c, v\u00e1n l\u1ea1ng. G\u1ed7 m\u1ec1m, h\u1ec7 s\u1ed1 co r\u00fat trung b\u00ecnh n\u00ean thu\u1eadn l\u1ee3i khi s\u1eed d\u1ee5ng \u1edf \u0111i\u1ec1u ki\u1ec7n trong nh\u00e0. G\u1ed7 Thanh th\u1ea5t t\u01b0\u01a1ng \u0111\u01b0\u01a1ng m\u1ed9t s\u1ed1 lo\u1ea1i g\u1ed7 x\u1ebfp nh\u00f3m VI khi ph\u00e2n lo\u1ea1i theo c\u00e1c t\u00ednh ch\u1ea5t c\u01a1 l\u00fd \u00e1p d\u1ee5ng cho c\u00e1c lo\u1ea1i g\u1ed7 d\u00f9ng \u0111\u1ec3 ch\u1ecbu l\u1ef1c ch\u1ee7 y\u1ebfu l\u00e0 trong x\u00e2y d\u1ef1ng v\u00e0 giao th\u00f4ng v\u1eadn t\u1ea3i. G\u1ed7 Thanh th\u1ea5t d\u1ec5 b\u1ecb n\u1ea5m bi\u1ebfn m\u00e0u t\u1ea5n c\u00f4ng ngay sau khi ch\u1eb7t h\u1ea1, do v\u1eady c\u1ea7n c\u00f3 bi\u1ec7n ph\u00e1p x\u1ebb, s\u1ea5y ngay sau khi khai th\u00e1c ho\u1eb7c ch\u1ed1ng n\u1ea5m.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Thanh th\u1ea5t, t\u00ednh ch\u1ea5t v\u1eadt l\u00fd, t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc, s\u1eed d\u1ee5ng g\u1ed7<\/td>\n<\/tr>\n

\n

<\/a>Assessment of the possibility in wood utilization of Ailanthus triphysa<\/em> Alston<\/strong><\/p>\n

Ailanthus triphysa<\/em> (Dennst) Alston is known as a fast growing timber tree, adapting to many different ecological regions in Vietnam. Wood of Ailanthus triphysa<\/em> is soft, smooth and straight, easy to process, peeled and inflammable material, and can be used for match production. Research on some physical and mechanical properties of Ailanthus triphysa<\/em> wood contributes to providing a scientific basis for the use of this tree. The results show that there are many low physical and mechanical properties (density: 0.37 g\/cm3<\/sup>, volume shrinkage coefficient: 0.55, compression parallel to grain: 23.8 MPa, static bending: 46.5 MPa, impact strength: 37.2 kJ\/m2<\/sup>) so wood can be used for purposes that do not require a high load, suitable for veneer producing. Soft wood, average shrinkage coefficient should be convenient in case of indoor using. Wood is classified in Group VI according to the mechanical properties requirments for construction and transportation. Green wood is easily attacked by discolored fungi after felling, it is necessary to process and dry in short time right after harvesting or preservation.<\/p>\n

Keywords:<\/em><\/strong> Ailanthus triphysa<\/em>, wood physical properties, wood machenical properties, wood utilization<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>X\u00c1C \u0110\u1ecaNH TH\u00d4NG S\u1ed0 C\u00d4NG NGH\u1ec6 S\u1ea4Y S\u01a0 B\u1ed8 G\u1ed6 X\u1eba KEO TAI T\u01af\u1ee2NG (Acacia mangium<\/em>) B\u1eb0NG L\u00d2 S\u1ea4Y N\u0102NG L\u01af\u1ee2NG M\u1eb6T TR\u1edcI<\/p>\n

<\/a>H\u00e0 Ti\u1ebfn M\u1ea1nh, B\u00f9i Duy Ng\u1ecdc, \u0110\u1eb7ng \u0110\u1ee9c Vi\u1ec7t, Tr\u1ea7n \u0110\u1ee9c Trung<\/p>\n

Vi\u1ec7n Nghi\u00ean c\u1ee9u C\u00f4ng nghi\u1ec7p r\u1eebng<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Nghi\u00ean c\u1ee9u n\u00e0y \u0111\u00e3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c th\u00f4ng s\u1ed1 c\u00f4ng ngh\u1ec7 v\u00e0 \u0111\u1ec1 xu\u1ea5t quy tr\u00ecnh s\u00e2\u0301y s\u01a1 b\u00f4\u0323 ph\u00f9 h\u1ee3p cho g\u1ed7 xe\u0309 Keo tai t\u01b0\u1ee3ng (Acacia mangium<\/em>) r\u1eebng tr\u1ed3ng b\u1eb1ng l\u00f2 s\u1ea5y n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi, sau khi ti\u1ebfn h\u00e0nh c\u00e1c m\u1ebb s\u1ea5y th\u00ed nghi\u1ec7m t\u1eeb \u0111\u1ed9 \u1ea9m 50% v\u1ec1 30% \u1edf c\u00e1c d\u1ed1c s\u1ea5y kh\u00e1c nhau (U = 2,4; U = 2,8; U = 3,2). G\u1ed7 Keo tai t\u01b0\u1ee3ng khi s\u1ea5y \u1edf ch\u1ebf \u0111\u1ed9 s\u1ea5y c\u1ee9ng nh\u1ea5t (d\u1ed1c s\u1ea5y U = 3,2) c\u00f3 m\u1ee9c \u0111\u1ed9 n\u1ee9t v\u1ee1 l\u00e0 l\u1edbn nh\u1ea5t (0,72%), v\u1eabn \u0111\u01b0\u1ee3c x\u1ebfp h\u1ea1ng B theo ti\u00eau chu\u1ea9n AS\/NZ 4787:2001. M\u1ee9c \u0111\u1ed9 cong v\u00eanh c\u1ee7a g\u1ed7 Keo tai t\u01b0\u1ee3ng c\u0169ng r\u1ea5t nh\u1ecf, trung b\u00ecnh l\u00e0 0,051% v\u00e0 ch\u00eanh l\u1ec7ch kh\u00f4ng nhi\u1ec1u, kh\u00f4ng theo quy lu\u1eadt gi\u1eefa c\u00e1c ch\u1ebf \u0111\u1ed9 s\u1ea5y. S\u1ef1 kh\u00f4ng theo quy lu\u1eadt n\u00e0y c\u0169ng x\u1ea3y ra khi x\u00e1c \u0111\u1ecbnh t\u1ef7 l\u1ec7 co r\u00fat theo chi\u1ec1u d\u00e0y (1,423%) v\u00e0 t\u1ef7 l\u1ec7 co r\u00fat theo chi\u1ec1u r\u1ed9ng (1,308%). B\u00ean c\u1ea1nh \u0111\u00f3, th\u1eddi gian s\u1ea5y \u1edf d\u1ed1c s\u1ea5y U = 3,2 l\u00e0 ng\u1eafn nh\u1ea5t (20,06 ng\u00e0y). D\u1ed1c s\u1ea5y U = 3,2 \u0111\u00e3 \u0111\u01b0\u1ee3c l\u1ef1a ch\u1ecdn \u0111\u1ec3 l\u00e0m ch\u1ebf \u0111\u1ed9 s\u1ea5y s\u01a1 b\u1ed9 b\u1eb1ng n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi cho g\u1ed7 Keo tai t\u01b0\u1ee3ng.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> L\u00f2 s\u1ea5y n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi, ch\u1ebf \u0111\u1ed9 s\u1ea5y s\u01a1 b\u1ed9, g\u1ed7 Keo tai t\u01b0\u1ee3ng<\/td>\n<\/tr>\n

\n

<\/a>Investigation into the pre – drying procedure for Acacia mangium<\/em> sawn timber in solar kiln<\/strong><\/p>\n

This study investigated the suitable pre – drying technological parameters and procedure for Acacia mangium<\/em> plantation sawn timber in solar kiln. Experimental drying batches with the different drying gradients (U = 2.4; U = 2.8; U = 3.2) were conducted to dry timber from 50% to 30% moisture content (MC). The percentage of checks and splits was highest (0.72%) at the harsh drying schedule (U = 3.2). This value met class B according to the cracking classification for dried wood in Australian Standard AS\/NZ 4787:2000 AS\/NZ 4787:2001. The degree of warping was also very small (0.051%) and slightly different. This was not in accordance with any drying schedules selected. This trend also occured when determining the shrinkage ratio in thickness and width (1.423% and 1.308% on average, respectively). In addition, the drying time was fastest (20.06 days) at the drying gradient of 3.2. The drying gradient of 3.2 was selected for the pre – drying schedule using solar energy for Acacia mangium<\/em> sawn timber.<\/p>\n

Keywords:<\/em><\/strong> Solar drying kiln, pre – drying schedule, Acacia mangium<\/em><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>C\u00d4NG NGH\u1ec6 BI\u1ebeN T\u00cdNH H\u00d3A NHI\u1ec6T V\u1edaI C\u00c1C H\u1ee2P CH\u1ea4T N-METHYLOL, SILICONE V\u00c0 D\u1ea6U V\u1ece H\u1ea0T \u0110I\u1ec0U NH\u1eb0M N\u00c2NG CAO \u0110\u1ed8 B\u1ec0N T\u1ef0 NHI\u00caN V\u00c0 GI\u00c1 TR\u1eca GIA T\u0102NG CHO C\u00c1C S\u1ea2N PH\u1ea8M V\u00c1N M\u1eceNG V\u00c1N D\u00c1N T\u1eea G\u1ed6 R\u1eeaNG TR\u1ed2NG<\/p>\n

<\/a>Nguy\u1ec5n H\u1ed3ng Minh, Nguy\u1ec5n Quang Trung, L\u00ea Th\u1ecb H\u01b0ng<\/p>\n

Vi\u1ec7n Nghi\u00ean c\u1ee9u C\u00f4ng nghi\u1ec7p r\u1eebng<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Th\u1ef1c hi\u1ec7n ch\u00ednh s\u00e1ch \u0111\u00f3ng c\u1eeda r\u1eebng t\u1ef1 nhi\u00ean c\u1ee7a Ch\u00ednh ph\u1ee7, c\u00e1c gi\u1ea3i ph\u00e1p k\u1ef9 thu\u1eadt c\u1ea7n \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a m\u1ed9t c\u00e1ch \u0111\u1ed3ng b\u1ed9 h\u01b0\u1edbng t\u1edbi s\u1ef1 chuy\u1ec3n \u0111\u1ed5i t\u1eeb g\u1ed7 r\u1eebng t\u1ef1 nhi\u00ean sang g\u1ed7 r\u1eebng tr\u1ed3ng. Vi\u1ec7c nghi\u00ean c\u1ee9u v\u00e0 \u1ee9ng d\u1ee5ng c\u00f4ng ngh\u1ec7 bi\u1ebfn t\u00ednh g\u1ed7 h\u00f3a nhi\u1ec7t v\u1edbi c\u00e1c h\u00f3a ch\u1ea5t th\u00e2n thi\u1ec7n m\u00f4i tr\u01b0\u1eddng nh\u01b0 N-methylol, d\u1ea7u v\u1ecf h\u1ea1t \u0111i\u1ec1u v\u00e0 c\u00e1c h\u1ee3p ch\u1ea5t silicon gi\u00fap n\u00e2ng cao gi\u00e1 tr\u1ecb s\u1ea3n xu\u1ea5t v\u00e0 s\u1eed d\u1ee5ng v\u00e1n m\u1ecfng, v\u00e1n d\u00e1n t\u1eeb g\u1ed7 r\u1eebng tr\u1ed3ng l\u00e0 m\u1ed9t y\u1ebfu t\u1ed1 quan tr\u1ecdng \u0111\u1ea3m b\u1ea3o cho qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i di\u1ec5n ra th\u00e0nh c\u00f4ng. \u0110\u1ec1 t\u00e0i nghi\u00ean c\u1ee9u c\u1ea5p Nh\u00e0 n\u01b0\u1edbc \u201cNghi\u00ean c\u1ee9u c\u00f4ng ngh\u1ec7 s\u1ea3n xu\u1ea5t v\u00e0 s\u1eed d\u1ee5ng v\u00e1n m\u1ecfng (v\u00e1n b\u00f3c v\u00e0 v\u00e1n l\u1ea1ng) ch\u1ea5t l\u01b0\u1ee3ng cao \u0111\u1ea3m b\u1ea3o ti\u00eau chu\u1ea9n xu\u1ea5t kh\u1ea9u t\u1eeb g\u1ed7 keo v\u00e0 b\u1ea1ch \u0111\u00e0n\u201d thu\u1ed9c Ch\u01b0\u01a1ng tr\u00ecnh Khoa h\u1ecdc v\u00e0 C\u00f4ng ngh\u1ec7 tr\u1ecdng \u0111i\u1ec3m c\u1ea5p Nh\u00e0 n\u01b0\u1edbc giai \u0111o\u1ea1n 2011 – 2015. Nghi\u00ean c\u1ee9u \u1ee9ng d\u1ee5ng v\u00e0 Ph\u00e1t tri\u1ec3n C\u00f4ng ngh\u1ec7 sau thu ho\u1ea1ch n\u1eb1m trong b\u1ed1i c\u1ea3nh t\u1ed5ng th\u1ec3 c\u1ee7a qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i t\u1eeb s\u1eed d\u1ee5ng g\u1ed7 r\u1eebng t\u1ef1 nhi\u00ean sang g\u1ed7 r\u1eebng tr\u1ed3ng v\u1edbi gi\u00e1 tr\u1ecb gia t\u0103ng cao. Nghi\u00ean c\u1ee9u \u0111\u00e3 \u0111\u1ea1t \u0111\u01b0\u1ee3c m\u1ee5c ti\u00eau \u0111\u1ec1 ra, x\u00e2y d\u1ef1ng \u0111\u01b0\u1ee3c c\u00e1c quy tr\u00ecnh c\u00f4ng ngh\u1ec7 s\u1ea3n xu\u1ea5t v\u00e1n b\u00f3c, v\u00e1n l\u1ea1ng v\u00e0 v\u00e1n d\u00e1n ch\u1ea5t l\u01b0\u1ee3ng cao t\u1eeb g\u1ed7 keo v\u00e0 b\u1ea1ch \u0111\u00e0n \u0111\u1ea1t ti\u00eau chu\u1ea9n xu\u1ea5t kh\u1ea9u theo c\u00e1c ti\u00eau chu\u1ea9n EN, JAS, ASTM hi\u1ec7n h\u00e0nh nh\u01b0: Ch\u1ea5t l\u01b0\u1ee3ng v\u00e1n m\u1ecfng: EN 635 – 2; Kh\u1ea3 n\u0103ng ch\u1ed1ng ch\u1ecbu th\u1eddi ti\u1ebft v\u00e0 n\u1ea5m bi\u1ebfn m\u00e0u: EN 927 – 3, EN 152; \u0110\u1ed9 b\u1ec1n t\u1ef1 nhi\u00ean: EN 335 – 1, EN 350 – 1, EN 113, EN 152, ASTM – 3345; C\u01b0\u1eddng \u0111\u1ed9 c\u01a1 h\u1ecdc v\u00e0 v\u1eadt l\u00fd c\u1ee7a v\u00e1n d\u00e1n bi\u1ebfn t\u00ednh, v\u00e1n s\u00e0n bi\u1ebfn t\u00ednh: EN 323:1993, EN 317:1993, EN 322, JAS 233:2003, EN 310:1993, EN 314, ASTM D 4060, BS EN 636:2003; Ti\u00eau chu\u1ea9n ki\u1ec3m so\u00e1t m\u1ee9c \u0111\u1ed9 ph\u00e1t th\u1ea3i Formaldehyde v\u00e0o m\u00f4i tr\u01b0\u1eddng – E1 cho v\u00e1n d\u00e1n bi\u1ebfn t\u00ednh EN 717-3.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Keo tai t\u01b0\u1ee3ng, Keo l\u00e1 tr\u00e0m, B\u1ea1ch \u0111\u00e0n urophylla, N-methylol, Dimethyloldyhydroxyethyleneurea (DMDHEU), Modified Dimethyloldyhydroxyethylene urea (mDMDHEU), Epoxy functional polysiloxane (ES), Quaternary ammonium polysiloxane (QAS),
\nD\u1ea7u v\u1ecf h\u1ea1t \u0111i\u1ec1u.<\/p>\n<\/td>\n<\/tr>\n

\n

<\/a>Technological research on producing and use of high quality veneer and plywood made of acacia and eucalyptus for export<\/strong><\/p>\n

In the transition context of the production and use of wood from plantations are being promoted as a substitute for natural forest timber in Vietnam, the technical solutions should be optimized in an uniform direction to shift from natural forest wood to plantation timber. The research and technology applications on thermal chemical modification of wood with environmentally friendly chemicals such as N-methylol, cashew nut shell liquid and silicon compounds produced the enhanced properties veneer and plywood using plantation Acacia and Eucalyptus timber, thereby created one of the important manner to ensure the transition process would be proceeded successfuly. The State Level Research Project (KC 07.03\/11 – 15) on: \u201cTechnological research on producing and use of high quality veneer and plywood made of acacia and eucalyptus for export<\/em>\u201d is performed within the frame of State level Key Program (2011 – 2015) of Science and Technology on Post – harvest technology, Ministry of Science and Technology. Applied research and development of post – harvest technology in the overall context of the use transition of timber from natural forests to plantation timber with higher added value. The Research has achieved its objectives, building the production technologies process of hight quality veneer and plywood made of acacia and eucalyptus meeting standards EU, USA and Japan for export and initial starting successful application of technology to production realistic. The high quality properties of modified veneer and plywood achived are: The high ability resistance to weather: EN 927 – 3, EN 152, EN 335 – 1 (Very durable Class 3), durable to very durable Class 1 & 2 according to EN 350 – 1 standard & EN 113 (fungal decay), EN 152 (resistant to fungal discoloration, Very durable – Class 1), ASTM – 3345 (very durable); Hight Physio Mechanical strength for the indoor and outdoor furniture: BS EN 636: 2003; satisfied EN 635 – 2 for veneer quality; E1 Environmental standard for plywood according to EN 717 – 3.<\/p>\n

Keywords:<\/em><\/strong> Acacia mangium<\/em>, Acacia auriculuformis<\/em>, Eucalyptus urphylla<\/em>, N-methylol, Dimethyloldyhydroxyethyleneurea (DMDHEU), Modified Dimethyloldyhydroxyethylene urea (mDMDHEU), Epoxy functional polysiloxane (ES), Quaternary ammonium polysiloxane (QAS), Cashew nut shell liquid – CNSL<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>INVESTIGATION INTO UV – DRIVEN DISCOLORATION OF DYED WOOD VENEERS<\/p>\n

<\/a>Ngoc Bao Nguyen1,*<\/sup>, Barbara Ozarska2<\/sup>, Bui Duy Ngoc1<\/sup>,
\nMacarthur Fergusson3 <\/sup>and Peter Vinden2<\/sup><\/p>\n

1<\/sup><\/strong>Research Institute of Forest Industries, Vietnamese Academy of Forest Sciences
\n2<\/sup><\/strong>University of Melbourne, Victoria, Australia;
\n3<\/sup><\/strong> RMIT Universities, Victoria, Australia;<\/p>\n\n\n\n
SUMMARY<\/p>\n

This study investigated mitigation of UV – driven discoloration of dyed wood veneers peeled from Eucalyptus globulus<\/em> grown on plantations in Australia. The veneers from the tight and loose side of sapwood and heartwood samples with different moisture content (MC) levels were used and were called green veneer (80 \u00b1 5% MC) and dried veneer (12% MC). The veneers were dyed with 2% concentration of the reactive dye Procion Brown PX – 2R at a vacuum time of – 100 kPa for 15 minutes prior to a pressure of 1000 kPa. The dyed veneers were irradiated (1.2 W\/m2<\/sup>\/nm at 351 nm) in QUV accelerated weathering tester at a chamber temperature of 60o<\/sup>C and the colour change of the dyed veneers were then measured by using the CIE lab system after 12 different periods of the UV light exposure. A stable color change was observed at 504 hours of UV exposure. Results showed that there was no significant difference in the color change of the tight and loose sides of sapwood and heartwood of the dyed green and dry veneer samples after 504 hours of the UV light exposure.<\/p>\n

Keywords:<\/em><\/strong> Eucalyptus globulus,<\/em> UV exposure, CIE lab system, tight\/loose side, dye wood veneer<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U KH\u1ea2 N\u0102NG PH\u00d2NG CH\u1ed0NG N\u1ea4M M\u1ed0C H\u1ea0I G\u1ed6 C\u1ee6A THU\u1ed0C B\u1ea2O QU\u1ea2N BORACOL<\/p>\n

<\/a>Nguy\u1ec5n Th\u1ecb B\u00edch Ng\u1ecdc1<\/sup>, B\u00f9i Th\u1ecb Th\u1ee7y2<\/sup>, \u0110o\u00e0n Th\u1ecb B\u00edch Ng\u1ecdc2<\/sup>,
\nHo\u00e0ng Th\u1ecb T\u00e1m2<\/sup>, Nguy\u1ec5n Th\u1ecb H\u1eb1ng2<\/sup>, B\u00f9i V\u0103n \u00c1i2<\/sup>, Nguy\u1ec5n V\u0103n \u0110\u1ee9c2<\/sup><\/p>\n

1<\/sup>Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam
\n2<\/sup>Vi\u1ec7n Nghi\u00ean c\u1ee9u C\u00f4ng nghi\u1ec7p r\u1eebng<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

G\u1ed7 v\u00e0 c\u00e1c s\u1ea3n ph\u1ea9m g\u1ed7 r\u1ea5t d\u1ec5 b\u1ecb x\u00e2m h\u1ea1i b\u1edfi n\u1ea5m m\u1ed1c khi g\u1eb7p \u0111i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng \u0111\u1ed9 \u1ea9m cao. C\u00e1c c\u00f4ng th\u1ee9c thu\u1ed1c b\u1ea3o qu\u1ea3n g\u1ed7 th\u00ed nghi\u1ec7m d\u1ea1ng Boracol l\u00e0 h\u1ed7n h\u1ee3p g\u1ed3m Disodium octaborate tetrahydrate (DOT) tan trong Propylen glycol (PG) c\u00f3 b\u1ed5 sung ph\u1ee5 gia Didecyldimethylammonium Chloride (DDAC) \u0111\u00e3 \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u \u0111\u00e1nh gi\u00e1 hi\u1ec7u l\u1ef1c ph\u00f2ng ch\u1ed1ng n\u1ea5m m\u1ed1c cho g\u1ed7 keo lai v\u00e0 Th\u00f4ng nh\u1ef1a g\u1ed7 theo ph\u01b0\u01a1ng ph\u00e1p nh\u00fang. Hi\u1ec7u l\u1ef1c ph\u00f2ng ch\u1ed1ng n\u1ea5m m\u1ed1c t\u0103ng l\u00ean theo c\u1ea5p n\u1ed3ng \u0111\u1ed9 DOT t\u0103ng t\u1eeb 10 – 20% v\u00e0 th\u1eddi gian nh\u00fang t\u0103ng t\u1eeb
\n1 – 10 ph\u00fat. \u1ede c\u1ea5p n\u1ed3ng \u0111\u1ed9 DOT 10 – 12%, nh\u00fang 10 ph\u00fat, v\u1edbi l\u01b0\u1ee3ng dung d\u1ecbch th\u1ea5m \u0111\u1ea1t 0,10 – 0,14 kg\/m2<\/sup> (\u0111\u1ed1i v\u1edbi g\u1ed7 keo lai) v\u00e0 0,38 – 0,49 kg\/m2<\/sup> (\u0111\u1ed1i v\u1edbi g\u1ed7 Th\u00f4ng nh\u1ef1a), c\u00f4ng th\u1ee9c thu\u1ed1c \u0111\u1ea1t hi\u1ec7u l\u1ef1c \u1edf c\u1ea5p 2 – c\u1ea5p c\u00f3 hi\u1ec7u l\u1ef1c kh\u00e1. T\u1ea1i c\u1ea5p n\u1ed3ng \u0111\u1ed9 15% v\u00e0 18%, nh\u00fang 10 ph\u00fat, l\u01b0\u1ee3ng dung d\u1ecbch th\u1ea5m \u0111\u1ea1t 0,16 – 0,22 kg\/m2<\/sup> (\u0111\u1ed1i v\u1edbi g\u1ed7 keo lai) v\u00e0 0,57 – 0,72 kg\/m2<\/sup> (\u0111\u1ed1i v\u1edbi g\u1ed7 Th\u00f4ng nh\u1ef1a), \u0111\u1ea1t c\u1ea5p \u0111\u1ed9 0 – 1, \u0111\u1ea1t hi\u1ec7u l\u1ef1c t\u1ed1t v\u00e0 r\u1ea5t t\u1ed1t ph\u00f2ng ch\u1ed1ng n\u1ea5m m\u1ed1c. V\u1edbi n\u1ed3ng \u0111\u1ed9 DOT 20%, thu\u1ed1c \u0111\u1ea1t hi\u1ec7u l\u1ef1c t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi n\u1ed3ng \u0111\u1ed9 18%.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Boracol, n\u1ea5m m\u1ed1c, hi\u1ec7u l\u1ef1c ph\u00f2ng ch\u1ed1ng<\/td>\n<\/tr>\n

\n

<\/a>Studying on the protective effectiveness of wood treated with boracol preservatves against mold<\/strong><\/p>\n

Wood and wood – based products are easily attacked by mold under conditions of high environmental. Humidity Boracol preservative – a mixture of Disodium octaborate tetrahydrate, Propylen glycol, Didecyldimethylammonium Chloride and surface treatment – has been studiedand evaluated effectively with mold for acacia hybrid and Pinus merkusii<\/em> wood. The mold preventive performancewas enhanced when concentration of DOT and treated time increased with the ranges of 10 – 20% DOT and 1 – 10 minutes duration respectively. Wood specimens weresubmergedin 10 minutes with DOT 10 – 12%, which retention of preservatives are 0.10 – 0.14 kg\/m2<\/sup> (acacia hybrid) and 0.38 – 0.49 kg\/m2<\/sup> (Pinus merkusii<\/em>), that lead to the mold preventive capability level 2. In case of wood specimens were dippedin 10 minutes with DOT 15 – 18%, the retention resultsare 0.16 – 0.22 kg\/m2<\/sup> (acacia hybrid) and 0.57 – 0.72 kg\/m2<\/sup> (Pinus merkusii<\/em>), deliver the performance of accepatable level 0 and 1 respectively. The exceeded treatment with DOT 20% did not prove significant better performance than 18% concentration.<\/p>\n

Keywords:<\/em><\/strong> Boracol, mold, protective effectiveness<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U KH\u1ea2 N\u0102NG PH\u00d2NG CH\u1ed0NG N\u1ea4M M\u1ee4C H\u1ea0I G\u1ed6 C\u1ee6A THU\u1ed0C B\u1ea2O QU\u1ea2N D\u1ea0NG BORACOL<\/p>\n

<\/a>Nguy\u1ec5n Th\u1ecb B\u00edch Ng\u1ecdc1<\/sup>, B\u00f9i Th\u1ecb Th\u1ee7y2<\/sup>, B\u00f9i V\u0103n \u00c1i2<\/sup>, Nguy\u1ec5n V\u0103n \u0110\u1ee9c2<\/sup>,
\n\u0110o\u00e0n Th\u1ecb B\u00edch Ng\u1ecdc2<\/sup>, Ho\u00e0ng Th\u1ecb T\u00e1m2<\/sup>, Nguy\u1ec5n Th\u1ecb H\u1eb1ng2<\/sup>,<\/p>\n

1<\/sup>Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam
\n2<\/sup>Vi\u1ec7n Nghi\u00ean c\u1ee9u C\u00f4ng nghi\u1ec7p r\u1eebng<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

C\u00e1c c\u00f4ng th\u1ee9c thu\u1ed1c b\u1ea3o qu\u1ea3n g\u1ed7 th\u00ed nghi\u1ec7m d\u1ea1ng Boracol l\u00e0 h\u1ed7n h\u1ee3p g\u1ed3m Disodium octaborate tetrahydrate (DOT) tan trong Propylen glycol (PG) ho\u1eb7c Etylene glycol (EG) c\u00f3 b\u1ed5 sung ph\u1ee5 gia Didecyldimethylammonium Chloride (DDAC) \u0111\u00e3 \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u \u0111\u00e1nh gi\u00e1 hi\u1ec7u l\u1ef1c ph\u00f2ng ch\u1ed1ng n\u1ea5m m\u1ee5c Trametes corrugata T1 h\u1ea1i g\u1ed7 Th\u00f4ng nh\u1ef1a Pinus merkusii<\/em> theo ph\u01b0\u01a1ng ph\u00e1p nh\u00fang. Hi\u1ec7u l\u1ef1c ph\u00f2ng ch\u1ed1ng n\u1ea5m m\u1ee5c \u1edf c\u1ea5p n\u1ed3ng \u0111\u1ed9 DOT 5 – 7% \u0111\u1ea1t m\u1ee9c kh\u00e1 v\u1edbi th\u1eddi gian nh\u00fang 1 ph\u00fat, l\u01b0\u1ee3ng dung d\u1ecbch thu\u1ed1c th\u1ea5m \u0111\u1ea1t 0,68 – 0,70 kg\/m2<\/sup> (hao h\u1ee5t kh\u1ed1i l\u01b0\u1ee3ng m\u1eabu 5,3 – 6,5% v\u00e0 5,8 – 7,9%, t\u01b0\u01a1ng \u1ee9ng v\u1edbi dung m\u00f4i PG v\u00e0 EG), \u0111\u1ea1t m\u1ee9c t\u1ed1t v\u1edbi th\u1eddi gian nh\u00fang 5 ph\u00fat v\u00e0 10 ph\u00fat, l\u01b0\u1ee3ng dung d\u1ecbch thu\u1ed1c th\u1ea5m \u0111\u1ea1t 0,70 – 0,76 kg\/m2 <\/sup>(hao h\u1ee5t kh\u1ed1i l\u01b0\u1ee3ng m\u1eabu 0 – 3,8% v\u00e0 1,1 – 4,5%, t\u01b0\u01a1ng \u1ee9ng v\u1edbi dung m\u00f4i PG v\u00e0 EG). \u1ede c\u00e1c c\u1ea5p n\u1ed3ng \u0111\u1ed9 DOT 10 – 15%, th\u1eddi gian x\u1eed l\u00fd 1 – 10 ph\u00fat, l\u01b0\u1ee3ng dung d\u1ecbch thu\u1ed1c th\u1ea5m \u0111\u1ea1t 0,70 – 0,76 kg\/m2<\/sup> (hao h\u1ee5t kh\u1ed1i l\u01b0\u1ee3ng m\u1eabu t\u1eeb 0 – 3,4%), \u0111\u1ec1u \u0111\u1ea1t hi\u1ec7u l\u1ef1c t\u1ed1t ph\u00f2ng ch\u1ed1ng n\u1ea5m m\u1ee5c v\u1edbi c\u1ea3 2 lo\u1ea1i dung m\u00f4i PG v\u00e0 EG.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Boracol, n\u1ea5m m\u1ee5c, thu\u1ed1c b\u1ea3o qu\u1ea3n g\u1ed7, b\u1ea3o qu\u1ea3n g\u1ed7<\/td>\n<\/tr>\n

\n

<\/a>Studying on the protective effectiveness of wood treated with Boracol preservatives against wood destroying basidiomycetes<\/strong><\/p>\n

The formulae of wood preservatives in the form of Boracol used for experimentation is a mixture of Disodium octaborate tetrahydrate (DOT) dissolved in Propylen glycol (PG) or Etylene glycol (EG) with added Didecyl dimethylammonium Chloride (DDAC). The solutions have been used for laboratory tests aiming to determine the efficacy of the compounds against basidiomycetes Trametes corrugata T1 attack on Pinus merkusii<\/em> wood treated with dipping method. The efficacy of Boracol preservatives was valued at good – grade when dipping in DOT concentration 5 – 7% for 1 minutes corresponding to retention of preservatives 0.68 – 0.70 kg\/m2 <\/sup>(The mass losses 5.3 – 6.5% and 5.8 – 7.9% with PG and EG, respectively); it valued as very good when 5 and 10 minutes duration with retention of preservatives at 0.70 – 0.76 kg\/m2<\/sup> (The mass losses 0 – 3.8% and 1.1 – 4.5% with PG and EG, respectively). The efficacy of Boracol preservatives was excellent at DOT concentration 10 – 15% and 1 – 10 minutes duration, corresponding to retention of preservatives 0.70 – 0.76 kg\/m2 <\/sup>(The mass losses 0 – 3.4% with both PG and EG).<\/p>\n

Keywords:<\/em><\/strong> Boracol, basidiomycetes, wood preservatives, wood preservation<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>HI\u1ec6U L\u1ef0C PH\u00d2NG M\u1ed0I G\u00c2Y H\u1ea0I L\u00c2M S\u1ea2N C\u1ee6A THU\u1ed0C B\u1ea2O QU\u1ea2N G\u1ed6 D\u1ea0NG BORACOL<\/p>\n

<\/a>Nguy\u1ec5n Th\u1ecb B\u00edch Ng\u1ecdc1<\/sup>, Ho\u00e0ng Th\u1ecb T\u00e1m2<\/sup>, B\u00f9i V\u0103n \u00c1i2<\/sup>, Nguy\u1ec5n V\u0103n \u0110\u1ee9c2
\n<\/sup>Nguy\u1ec5n Th\u1ecb H\u1eb1ng2<\/sup>, \u0110o\u00e0n Th\u1ecb B\u00edch Ng\u1ecdc2<\/sup>, B\u00f9i Th\u1ecb Th\u1ee7y2<\/sup><\/p>\n

1<\/sup>Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam
\n2<\/sup>Vi\u1ec7n Nghi\u00ean c\u1ee9u C\u00f4ng nghi\u1ec7p r\u1eebng<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Thu\u1ed1c b\u1ea3o qu\u1ea3n d\u1ea1ng Boracol d\u00f9ng trong nghi\u00ean c\u1ee9u l\u00e0 h\u1ed7n h\u1ee3p g\u1ed3m Disodium octaborate tetrahydrate (DOT) h\u00f2a tan trong Propylen glycol (PG) c\u00f3 b\u1ed5 sung ph\u1ee5 gia Didecyldimethylammonium Chloride (DDAC). C\u00e1c c\u00f4ng th\u1ee9c th\u00ed nghi\u1ec7m \u0111\u01b0\u1ee3c kh\u1ea3o nhi\u1ec7m hi\u1ec7u l\u1ef1c ph\u00f2ng m\u1ed1i nh\u00e0 Coptotermes formosamus<\/em> Shiraki trong ph\u00f2ng th\u00ed nghi\u1ec7m. \u1ede c\u1ea5p n\u1ed3ng \u0111\u1ed9 DOT 5%, thu\u1ed1c c\u00f3 hi\u1ec7u l\u1ef1c trung b\u00ecnh \u0111\u1ed1i v\u1edbi m\u1ed1i. \u1ede c\u1ea5p n\u1ed3ng \u0111\u1ed9 DOT 7%, 10%, 15% th\u1eddi gian x\u1eed l\u00fd thu\u1ed1c l\u00e0 1 ph\u00fat, 5 ph\u00fat, 10 ph\u00fat theo ph\u01b0\u01a1ng ph\u00e1p nh\u00fang, hi\u1ec7u l\u1ef1c ph\u00f2ng ch\u1ed1ng m\u1ed1i t\u0103ng l\u00ean \u0111\u1ec1u \u0111\u1ea1t m\u1ee9c t\u1ed1t v\u1edbi tr\u00ean hai lo\u1ea1i g\u1ed7 keo lai v\u00e0 Th\u00f4ng nh\u1ef1a.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Boracol, m\u1ed1i, thu\u1ed1c b\u1ea3o qu\u1ea3n g\u1ed7, b\u1ea3o qu\u1ea3n g\u1ed7<\/td>\n<\/tr>\n

\n

<\/a>Effects on termite of wood treated by Boracol wood preservativer<\/strong><\/p>\n

Boracol wood preservatives – a mixture of Disodium octaborate tetrahydrate, Propylen glycol, Didecyldimethylammonium Chloride. Laboratory termite resistance tests were then performed to determine the efficacy of the compounds against termite (Coptotermes formsanus<\/em> Shiraki) attack on acacia hybrid and Pinus merkusii<\/em> wood. Effective test results show that at the level of 5% DOT concentration has moderate effect on termite. The efficacy of Boracol preservatives was enhanced when DOT concentration was increased up to7%. The concentration of DOT at 7, 10, 15%; treatment time 1, 5, 10 minute by dipping method, the resistance to termite is at good level.<\/p>\n

Keywords:<\/em><\/strong> Boracol, termite, wood preservatives, wood preservation<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U DI\u1ec4N BI\u1ebeN C\u01af\u1edcNG \u0110\u1ed8 B\u1ee8C X\u1ea0 M\u1eb6T TR\u1edcI TA\u0323I B\u00ccNH \u0110\u1ecaNH PH\u1ee4C V\u1ee4 S\u1ea4Y G\u1ed6 R\u1eeaNG TR\u1ed2NG<\/p>\n

<\/a>B\u00f9i Duy Ng\u1ecdc, L\u00ea Xu\u00e2n Ph\u00fac, Nguy\u1ec5n V\u0103n Gi\u00e1p, L\u00ea Th\u1ecb H\u01b0ng<\/p>\n

Vi\u1ec7n Nghi\u00ean c\u1ee9u C\u00f4ng nghi\u1ec7p r\u1eebng<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

B\u00ecnh \u0110\u1ecbnh l\u00e0 t\u1ec9nh c\u00f3 ti\u1ec1m n\u0103ng n\u0103ng l\u01b0\u01a1\u0323ng m\u0103\u0323t tr\u01a1\u0300i (NLMT) l\u1edbn. Trung b\u00ecnh h\u00e0ng n\u0103m \u1edf khu v\u1ef1c n\u00e0y c\u00f3 s\u1ed1 gi\u1edd n\u1eafng kho\u1ea3ng 2.500 gi\u1edd\/n\u0103m v\u1edbi t\u1ed5ng l\u01b0\u1ee3ng b\u1ee9c x\u1ea1 trong n\u0103m kho\u1ea3ng 2.400 kWh\/m2<\/sup> v\u00e0 v\u1edbi \u01b0u th\u1ebf n\u00e0y th\u00ec vi\u1ec7c nghi\u00ean c\u1ee9u \u1ee9ng d\u1ee5ng NLMT v\u00e0o c\u00f4ng \u0111o\u1ea1n s\u1ea5y g\u00f4\u0303 r\u01b0\u0300ng tr\u00f4\u0300ng l\u00e0 ho\u00e0n to\u00e0n kh\u1ea3 thi. T\u1eeb th\u00e1ng 2 \u0111\u00ea\u0301n tha\u0301ng 9, th\u1eddi ti\u1ebft kh\u00ed h\u1eadu \u1edf B\u00ecnh \u0110\u1ecbnh r\u1ea5t th\u00edch h\u1ee3p cho vi\u1ec7c s\u1ea5y g\u1ed7 m\u00e0 kh\u00f4ng c\u1ea7n s\u1eed d\u1ee5ng gi\u1ea3i ph\u00e1p k\u1ef9 thu\u1eadt v\u00e0 ngu\u1ed3n n\u0103ng l\u01b0\u1ee3ng kh\u00e1c. \u0110\u1eb7c bi\u1ec7t t\u1eeb th\u00e1ng 3 \u0111\u00ea\u0301n tha\u0301ng7, c\u01b0\u1eddng \u0111\u1ed9 NLMT tr\u00ean b\u1ec1 m\u1eb7t r\u1ea5t l\u1edbn, n\u1ebfu c\u00f3 gi\u1ea3i ph\u00e1p t\u00edch l\u0169y t\u1ed1t NLMT thu \u0111\u01b0\u1ee3c trong ng\u00e0y l\u00e0m n\u00f3ng kh\u00ed s\u1ea5y v\u00e0o ban \u0111\u00eam s\u1ebd ch\u1ec9 c\u1ea7n d\u00f9ng NLMT \u0111\u1ec3 s\u1ea5y g\u1ed7 m\u00e0 kh\u00f4ng c\u1ea7n s\u1eed d\u1ee5ng n\u0103ng l\u01b0\u1ee3ng kh\u00e1c. Trong th\u00e1ng 1, n\u1eeda \u0111\u1ea7u th\u00e1ng 2 v\u00e0 th\u00e1ng 9, ch\u1ec9 c\u00f3 th\u1ec3 t\u1eadn d\u1ee5ng NLMT \u0111\u1ec3 s\u1ea5y b\u1ea3o qu\u1ea3n t\u1ea1m th\u1eddi, hong ph\u01a1i g\u1ed7. V\u00e0o th\u1eddi gian c\u00f3 m\u01b0a nhi\u1ec1u (t\u1eeb kho\u1ea3ng gi\u1eefa th\u00e1ng 10 \u0111\u1ebfn th\u00e1ng 12) kh\u00f4ng th\u1ec3 khai th\u00e1c s\u1eed d\u1ee5ng s\u1eed d\u1ee5ng NLMT v\u00e0o vi\u1ec7c s\u1ea5y g\u1ed7.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> N\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi, s\u1ea5y g\u1ed7 r\u01b0\u0300ng tr\u00f4\u0300ng<\/td>\n<\/tr>\n

\n

<\/a>Investigation intothesolar radiation cycle in Binh Dinh for wood drying<\/strong><\/p>\n

Binh Dinh is a province having a great solar energy potential. The average annual amount of sunshine in the area was about 2.500 hours with the total amount of solar radiation per year was approximately 2.400 kWh\/m2<\/sup>. As the solar radiation and temperature levels were high, this was a suitable location to implement solar kilns for drying timber. Between February and September, the climate in Binh Dinh wasi deal for drying wood without using technical solutions and other energy sources. In particular, during the period from March to July, the solar energy on the surface wasmassive, and therefore, if solar energy is well – obtained in daylight hours, timbers can beeffectively dried out without using other energy sources. In January, first half of February and September, solar energycould be only used for drying timber temporarily. Duringthe rainy season (between mid – October and December), it was impossible to implement solar kilns for drying timber.<\/p>\n

Keywords:<\/em><\/strong> Solar energy, drying timber<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>\u1ea2NH H\u01af\u1edeNG C\u1ee6A PLASMA \u0110\u1ebeN B\u1ec0 M\u1eb6T V\u00c1N B\u00d3C G\u1ed6 D\u01af\u01a0NG SAU KHI S\u1ea4Y \u1ede NHI\u1ec6T \u0110\u1ed8 CAO<\/p>\n

<\/a>Nguy\u1ec5n Th\u1ecb Ph\u01b0\u1ee3ng, V\u0169 \u0110\u00ecnh Th\u1ecbnh<\/p>\n

Vi\u1ec7n Nghi\u00ean c\u1ee9u C\u00f4ng nghi\u1ec7p r\u1eebng<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

V\u00e1n b\u00f3c g\u1ed7 D\u01b0\u01a1ng sau khi s\u1ea5y \u1edf nhi\u1ec7t \u0111\u1ed9 cao b\u1ec1 m\u1eb7t v\u00e1n b\u1ecb \u2018th\u1ee5 \u0111\u1ed9ng\u2019, n\u0103ng l\u01b0\u1ee3ng t\u1ef1 do gi\u1ea3m d\u1eabn \u0111\u1ebfn kh\u1ea3 n\u0103ng d\u00e1n d\u00ednh gi\u1ea3m, \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ch\u1ea5t l\u01b0\u1ee3ng s\u1ea3n ph\u1ea9m. Nghi\u00ean c\u1ee9u s\u1eed d\u1ee5ng c\u00f4ng ngh\u1ec7 Plasma x\u1eed l\u00fd b\u1ec1 m\u1eb7t v\u00e1n d\u00e1n g\u1ed7 D\u01b0\u01a1ng, c\u1ea3i thi\u1ec7n b\u1ec1 m\u1eb7t v\u00e1n b\u00f3c, t\u0103ng c\u01b0\u1eddng kh\u1ea3 n\u0103ng d\u00e1n d\u00ednh c\u1ee7a v\u00e1n d\u00e1n. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y: x\u1eed l\u00fd Plasma tr\u00ean b\u1ec1 m\u1eb7t v\u00e1n b\u00f3c g\u1ed7 D\u01b0\u01a1ng l\u00e0m t\u0103ng kh\u1ea3 n\u0103ng d\u00e1n d\u00ednh c\u1ee7a v\u00e1n r\u00f5 r\u1ec7t. C\u00f4ng su\u1ea5t x\u1eed l\u00fd Plasma l\u00e0 6kW, n\u0103ng l\u01b0\u1ee3ng t\u1ef1 do b\u1ec1 m\u1eb7t v\u00e1n t\u0103ng l\u00ean, g\u00f3c ban \u0111\u1ea7u v\u00e0 g\u00f3c c\u00e2n b\u1eb1ng c\u1ee7a keo UF gi\u1ea3m 16,5% v\u00e0 42,3% so v\u1edbi khi ch\u01b0a x\u1eed l\u00fd, \u0111\u1ed9 b\u1ec1n d\u00e1n d\u00ednh t\u0103ng 52%. Khi t\u1ed1c \u0111\u1ed9 x\u1eed l\u00fd Plasma l\u00e0 8 m\/ph\u00fat g\u00f3c ti\u1ebfp x\u00fac ban \u0111\u1ea7u v\u00e0 c\u00e2n b\u1eb1ng c\u1ee7a keo gi\u1ea3m 23% v\u00e0 27,6%; \u0111\u1ed9 b\u1ec1n d\u00e1n d\u00ednh c\u1ee7a v\u00e1n d\u00e1n t\u0103ng 52,3%. V\u00e1n b\u00f3c g\u1ed7 D\u01b0\u01a1ng sau khi x\u1eed l\u00fd Plasma v\u1edbi \u0111i\u1ec1u ki\u1ec7n 4,5 kW; 8 m\/ph\u00fat v\u1ecb tr\u00ed \u0111\u1ec9nh th\u00e0nh ph\u1ea7n methyl, methylene, hemicellulose v\u00e0 lignin kh\u00f4ng thay \u0111\u1ed5i, nh\u01b0ng \u0111\u1ed9 cao c\u1ee7a m\u1ed9t s\u1ed1 \u0111\u1ec9nh thay \u0111\u1ed5i \u0111\u00e1ng k\u1ec3. T\u1ea1i v\u1ecb tr\u00ed b\u01b0\u1edbc s\u00f3ng 1.031 cm-1<\/sup>, 1.156 cm-1<\/sup> sau khi x\u1eed l\u00fd Plasma \u0111\u1ed9 cao c\u1ee7a \u0111\u1ec9nh t\u0103ng, ch\u1ee9ng t\u1ecf s\u1ed1 l\u01b0\u1ee3ng C – O t\u0103ng l\u00ean, \u0111\u1ec9nh t\u1ea1i v\u1ecb tr\u00ed 2.848 cm-1<\/sup> \u0111\u1ed9 cao t\u0103ng, s\u1ed1 l\u01b0\u1ee3ng C – H t\u0103ng.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> V\u00e1n b\u00f3c g\u1ed7 D\u01b0\u01a1ng, n\u0103ng l\u01b0\u1ee3ng b\u1ec1 m\u1eb7t, x\u1eed l\u00fd Plasma<\/td>\n<\/tr>\n

\n

<\/a>Effect of plasma treatment on surface roughness of Poplar veneer after drying at high temperature<\/strong><\/p>\n

Surface roughness of the Poplar veneer was occurred after drying at high temperature, the surface free energy was decreased, resulted in reducing the adhesive ability, which affects the quality of final products. Study on plasma technology for the surface treatment of Poplar veneers improved the surface of the wood veneers, which had higher adhesive bonding strength of the products. Results showed that the plasma treatment on the surface of Poplar peeled veneers increased the adhesive bonding of the final products. Plasma energy of 6kW was used for the treatment. Compared to the untreated veneer samples, there was an increase of free energy of veneer surfaces in the plasma treated veneers. The initial angle (zero contact angle) and contact angle of UF adhesive were also decreased by 16.5% and 42.3% respectively, which led to the adhesion strength increased by 52%. When the speed of the plasma treatment was 8 m\/min, the initial angle and contact angle of the adhesive decreased by 23% and 27.6%; The adhesion strength of plywood increases 52.3%. At the treatment condition of 4.5 kW and 8 m\/min, the peaks of methyl, methylene, hemicellulose and lignin components of the treated veneers remained unchanged while the height of some peaks changed significantly. After the plasma treatment at the wavelength of 1,031 cm-1<\/sup> and 1,156 cm-1<\/sup>, the height of the peaks increased. It was evident that the C – O stretch increased, the peak at the wavelength of 2,848 cm-1<\/sup> height increased, the number of C – H increased.<\/p>\n

Keywords:<\/em><\/strong> Poplar veneer, surface roughness, plasma treatment<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>\u0110\u00c1NH GI\u00c1 PH\u01af\u01a0NG PH\u00c1P B\u1ea2O T\u1ed2N G\u1ed6 KH\u1ea2O C\u1ed4 NG\u1eacP N\u01af\u1edaC B\u1eb0NG COLOPHAN V\u00c0 POLYETHYLENE GLYCOL<\/p>\n

<\/a>Nguy\u1ec5n \u0110\u1ee9c Th\u00e0nh1<\/sup>, B\u00f9i Duy Ng\u1ecdc1<\/sup>, Nguy\u1ec5n Th\u1ecb B\u00edch Ng\u1ecdc2<\/sup><\/p>\n

1 <\/sup>Vi\u1ec7n Nghi\u00ean c\u1ee9u C\u00f4ng nghi\u1ec7p r\u1eebng
\n2 <\/sup>Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u th\u00ed nghi\u1ec7m x\u1eed l\u00fd b\u1ea3o qu\u1ea3n 03 lo\u1ea1i g\u1ed7 kh\u1ea3o c\u1ed5 ng\u1eadp n\u01b0\u1edbc (archaeological waterlogged wood – WW) b\u1eb1ng colophan (COL) v\u00e0 polyethylene glycol 4.000 (PEG) cho th\u1ea5y s\u1ef1 \u1ed5n \u0111\u1ecbnh k\u00edch th\u01b0\u1edbc c\u1ee7a m\u1eabu th\u00ed nghi\u1ec7m \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3. T\u00f9y thu\u1ed9c v\u00e0o t\u1eebng lo\u1ea1i g\u1ed7, h\u1ec7 s\u1ed1 ch\u1ed1ng co ng\u00f3t (ASE) c\u1ee7a m\u1eabu th\u00ed nghi\u1ec7m \u0111\u01b0\u1ee3c x\u1eed l\u00fd b\u1eb1ng COL \u0111\u1ea1t t\u1eeb 90 \u0111\u1ebfn 95%, trong khi \u0111\u00f3 h\u1ec7 s\u1ed1 n\u00e0y c\u1ee7a m\u1eabu th\u00ed nghi\u1ec7m x\u1eed l\u00fd b\u1eb1ng PEG \u0111\u1ea1t t\u1eeb 86% \u0111\u1ebfn 97%. Quan s\u00e1t c\u1ea5u tr\u00fac g\u1ed7 b\u1eb1ng k\u00ednh hi\u1ec3n vi \u0111i\u1ec7n t\u1eed qu\u00e9t cho th\u1ea5y m\u1eabu th\u00ed nghi\u1ec7m sau khi \u0111\u01b0\u1ee3c x\u1eed l\u00fd v\u1eabn duy tr\u00ec \u0111\u01b0\u1ee3c c\u1ea5u tr\u00fac v\u00e0 h\u00ecnh d\u1ea1ng t\u1ebf b\u00e0o ban \u0111\u1ea7u c\u1ee7a ch\u00fang. PEG ch\u1ee7 y\u1ebfu \u0111i\u1ec1n v\u00e0o c\u00e1c kho\u1ea3ng tr\u1ed1ng trong g\u1ed7 g\u1ed3m m\u1ea1ch g\u1ed7 v\u00e0 ru\u1ed9t s\u1ee3i g\u1ed7, trong khi \u0111\u00f3 COL l\u1ea1i h\u1ea5p th\u1ee5 v\u00e0o c\u00e1c v\u00e1ch t\u1ebf b\u00e0o g\u1ed7. T\u1ef7 l\u1ec7 ph\u1ea7n tr\u0103m t\u0103ng kh\u1ed1i l\u01b0\u1ee3ng m\u1eabu (R) m\u1eabu x\u1eed l\u00fd b\u1eb1ng PEG cao g\u1ea5p \u0111\u1ebfn 2 l\u1ea7n so v\u1edbi m\u1eabu x\u1eed l\u00fd b\u1eb1ng COL. B\u00ean c\u1ea1nh \u0111\u00f3, m\u1eabu \u0111\u01b0\u1ee3c x\u1eed l\u00fd b\u1eb1ng COL c\u00f3 m\u00e0u s\u1eafc s\u00e1ng h\u01a1n so v\u1edbi x\u1eed l\u00fd b\u1eb1ng PEG. Nh\u00ecn chung, m\u1eabu x\u1eed l\u00fd b\u1eb1ng COL c\u00f3 \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh k\u00edch th\u01b0\u1edbc t\u1ed1t h\u01a1n, ph\u1ea7n tr\u0103m t\u0103ng kh\u1ed1i l\u01b0\u1ee3ng th\u1ea5p h\u01a1n, m\u00e0u g\u1ed7 s\u00e1ng h\u01a1n v\u00e0 g\u1ed7 gi\u1eef \u0111\u01b0\u1ee3c c\u1ea5u tr\u00fac ban \u0111\u1ea7u n\u00ean c\u00f3 th\u1ec3 l\u1ef1a ch\u1ecdn \u0111\u1ec3 thay th\u1ebf PEG trong x\u1eed l\u00fd b\u1ea3o t\u1ed3n g\u1ed7 kh\u1ea3o c\u1ed5 \u1edf Vi\u1ec7t Nam.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> G\u1ed7 kh\u1ea3o c\u1ed5 ng\u1eadp n\u01b0\u1edbc, \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh k\u00edch th\u01b0\u1edbc, colophan, polyethylene glycol<\/td>\n<\/tr>\n

\n

<\/a>Conservation of historical wood using colophony and polyethylene glycol<\/strong><\/p>\n

In this article, the conservation of three archaeological waterlogged woods (WW) with colophony (COL) and polyethylene glycol (PEG) 4,000 was investigated. The results showed that the dimensional stability of WWs significantly improved after the different treatments. The anti – shrink efficiency (ASE) values of the WWs treated with COL ranged between 90% and 95% depending on the species and degree of wood degradation. These values varied from 86% to 97% for the WWs treated with PEG. Microscopic observations showed that the chemically treated woods maintained their original cell structures, forms, and shapes. It was also revealed that the reinforcement of cell walls by the COL treatment was different from those observed for the PEG treatments. It was observed that PEG primarily filled the wood voids, while COL predominantly absorbed on the cell walls. Based on the improved dimensional stability of wood, removability of chemical, and aesthetic results obtained from the treatment, the COL exhibited as alternatives to PEG for the treatment of WW in Vietnam.<\/p>\n

Keywords:<\/em><\/strong> Archaeological waterlogged wood, dimensional stability, colophony, polyethylene glycol<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U C\u00c1C B\u01af\u1edaC C\u00d4NG NGH\u1ec6 T\u1ea0O S\u1ea2N PH\u1ea8M TRE \u00c9P KH\u1ed0I L\u00c0M V\u1eacT LI\u1ec6U X\u00c2Y D\u1ef0NG<\/p>\n

Nguy\u1ec5n Quang Trung, Nguy\u1ec5n Th\u1ecb Ph\u01b0\u1ee3ng, Ph\u1ea1m Th\u1ecb Thanh Mi\u1ec1n<\/p>\n

Vi\u1ec7n Nghi\u00ean c\u1ee9u C\u00f4ng nghi\u1ec7p r\u1eebng<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

S\u1eed d\u1ee5ng Lu\u1ed3ng (Dendrocalamus barbatus<\/em>) khai th\u00e1c t\u1ea1i Thanh H\u00f3a \u0111\u1ec3 s\u1ea3n xu\u1ea5t tre \u00e9p kh\u1ed1i l\u00e0m v\u1eadt li\u1ec7u x\u00e2y d\u1ef1ng. C\u00e1c b\u01b0\u1edbc c\u00f4ng ngh\u1ec7 ch\u00ednh t\u1ea1o s\u1ea3n ph\u1ea9m tre \u00e9p kh\u1ed1i g\u1ed3m: T\u1ea1o nan nguy\u00ean li\u1ec7u \u0111\u00e3 lo\u1ea1i b\u1ecf s\u1ea1ch c\u1eadt v\u00e0 b\u1ee5ng; x\u1eed l\u00fd nhi\u1ec7t cho nan tre y\u00eau c\u1ea7u nhi\u1ec7t \u0111\u1ed9 \u0111\u1ea1t 140o<\/sup>C, th\u1eddi gian t\u1ed1i thi\u1ec3u 3 gi\u1edd; nhi\u1ec7t \u0111\u1ed9 s\u1ea5y nan c\u1ea7n \u0111\u1ea1t 100o<\/sup>C trong 6 ng\u00e0y; Nh\u00fang nan tre v\u00e0o dung d\u1ecbch keo P – F v\u1edbi t\u1ef7 l\u1ec7 pha keo: n\u01b0\u1edbc = 1:1, th\u1eddi gian ng\u00e2m 15 ph\u00fat, nhi\u1ec7t \u0111\u1ed9 s\u1ea5y nan sau ng\u00e2m keo kh\u00f4ng \u0111\u01b0\u1ee3c qu\u00e1 80o<\/sup>C, \u0111\u1ed9 \u1ea9m sau s\u1ea5y ph\u1ea3i \u0111\u1ea1t 12 – 15%; \u00e1p l\u1ef1c \u00e9p ngu\u1ed9i tre \u00e9p kh\u1ed1i l\u00e0 80 MPa; nhi\u1ec7t \u0111\u1ed9 s\u1ea5y khu\u00f4n t\u1eeb 90 – 140o<\/sup>C, \u0111\u01b0\u1ee3c chia l\u00e0m 6 v\u00f9ng nhi\u1ec7t \u0111\u1ed9, th\u1eddi gian s\u1ea5y 11 gi\u1edd. K\u1ebft qu\u1ea3 s\u1ea3n ph\u1ea9m tre \u00e9p kh\u1ed1i t\u1ea1o ra t\u1eeb qu\u00e1 tr\u00ecnh c\u00f4ng ngh\u1ec7 tr\u00ean \u0111\u1ea1t c\u00e1c ch\u1ec9 ti\u00eau ch\u1ea5t l\u01b0\u1ee3ng: \u0110\u1ed9 \u1ea9m 10,7%; Kh\u1ed1i l\u01b0\u1ee3ng th\u1ec3 t\u00edch: 1,05 g\/cm3<\/sup>; \u0110\u1ed9 b\u1ec1n n\u00e9n d\u1ecdc: 60,2 Mpa; \u0110\u1ed9 b\u1ec1n k\u00e9o d\u1ecdc: 103,3 Mpa; \u0110\u1ed9 b\u1ec1n u\u1ed1n t\u0129nh: 100,1 MPa.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Lu\u1ed3ng, tre \u00e9p kh\u1ed1i<\/td>\n<\/tr>\n

\n

<\/a>Research technology steps to create bamboo products for building materials<\/strong><\/p>\n

Using Luong bamboo (Dendrocalamus barbatus<\/em>) Thanh Hoa, to produce pressed bamboo block. The steps of product creation technology must be ensured as follows: Creating raw materials (bamboo has removed all the inner skin and outer skin); The heat treatment temperature for banboo is required to reach 140o<\/sup>C, the minimum time is 3 hours; materials drying temperature needs to reach 100o<\/sup>C for 6 days. The rate of glue mixing: water = 1:1, time of soaking for 15 min, the temperature of drying materials after soaking is not more than 80o<\/sup>C, the humidity after drying must be maintained from 12% ~ 15%; pressure of cold pressed bamboo blocks of construction materials is 80MPa; Mold drying temperature is divided into 6 drying temperature zones in 11 hours. Product results achieved through the above technology process: Humidity 10.7%. Volume of volume: 1,05 g\/cm3<\/sup>. Vertical compressive strength: 60.2 MPa. Vertical tensile strength: 103.3 MPa. Static bending strength: 100.1 Mpa<\/p>\n

Keywords:<\/em><\/strong> Dendrocalamus barbatus<\/em>, pressed bamboo block<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

T\u1ea0P CH\u00cd KHOA H\u1eccC L\u00c2M NGHI\u1ec6P S\u1ed0 CHUY\u00caN SAN – 2019 1. Vi\u1ec7n Nghi\u00ean c\u1ee9u C\u00f4ng nghi\u1ec7p r\u1eebng 45 n\u0103m x\u00e2y d\u1ef1ng v\u00e0 ph\u00e1t tri\u1ec3n (1974 – 2019) Nguy\u1ec5n Quang Trung B\u00f9i Duy Ng\u1ecdc Nguy\u1ec5n V\u0103n Gi\u00e1p V\u0169 \u0110\u00ecnh Th\u1ecbnh 3 2. Ti\u00eau ch\u00ed v\u00e0 ph\u01b0\u01a1ng ph\u00e1p x\u00e1c \u0111\u1ecbnh tu\u1ed5i th\u00e0nh th\u1ee5c c\u00f4ng ngh\u1ec7 theo […]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[26,24,45],"tags":[],"_links":{"self":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/1739"}],"collection":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/users\/12"}],"replies":[{"embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/comments?post=1739"}],"version-history":[{"count":4,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/1739\/revisions"}],"predecessor-version":[{"id":2402,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/1739\/revisions\/2402"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/media?parent=1739"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/categories?post=1739"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/tags?post=1739"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}