摘要：
Masson pine (Pinus massoniana L.) wood is one of the most important raw materials used as pulp and papermaking, which contains abundant rosin. The extractives can not only aggravate the water pollution, but waste bleaching agent. In order to explore the efficiently extracting technology on the leaching of micro-nano particles from masson pine chips in the process of pulping, the research on the extracting technology was carried out by means of the orthogonal test method. The results indicate: (1) Based on the volume fraction as the evaluating indicator, temperature has significant effect (at the level of 0.1) on the extracted quantity of the micro-nano particles with the diameter of less than 50.7nm, 50.7-106nm and 220-396nm, while weak effect (at the level of more than 0.5) on micron particles with the diameter of 106-220nm and more than 396nm. Based on the number fraction as the evaluating indicator, temperature only has significant effect (at the level of 0.1) on the extraction of nano particles with the diameter of less than 50.7nm. (2) Time has slight effect (at the level of more than 0.5) on the extraction of nano particles, while significant effect (at the level of 0.1) on micron particles. (3) Pressure has significant effect (at the level of 0.1) on the extraction of micron particles with the diameter of 106-220nm and more than 396nm. Therefore, we can conclude that the optimized extracting technology of micro-nano particles in masson pine wood are temperature of 120 degrees C, pressure of 0.4Mpa, time of 5h and ethanol fraction of 12.5%.
作者机构：
College of Materials Science and Engineering,Central South University of Forestry and Technology,410;State Key Lab of Pulp and Paper Engineering,South China University of Technology,510640,P.R.China
会议名称：
第二届国际造纸与环境学术会议(The Second International Papermaking & Environment Conference)
会议时间：
2008-05-14
会议地点：
天津
会议论文集名称：
第二届国际造纸与环境学术会议(The Second International Papermaking & Environment Conference)论文集
摘要：
Eucalyptus wood begins to be used for pulping.However,water and other chemical aids are severely wasted because the content of extractives is high.What is the worst,water pollution from the extractives is very serious.Therefore,the chemical components from fresh E.camaldulensis wood were extracted with benzene/ethanol and identified by Py-GC/MS after concentration.Relative content of each component was determined by area normalization.56 compounds of the extractives were identified.The main constituents were stigmasterol,22,23-dihydro-(19.11％),stigmastan-3,5-diene(4.98％),stigmastanol(4.77％),ethanediai(4.13％),stigmast-4-en-3-one(4.06％),acetone(3.3％),n-hexadecanoic acid(3.11％),1-hexacosanol(2.71％),9,19-cyclolanost-25-en-3-ol,24-methyl-(2.45％),9,12-octadecadienoic acid(z,z)-(2.17％),9,19-cycloergost-24(28)-en-3-ol,4,14-dimethyl-(2.16％),vitamin E(2.12％),cyclopropa[5,6]stigmast-22-en-3-one,3',6-dihydro-(1.77％),acetic acid(1.34％),ethanol(1.19％),cedrol(1.12％),benzene(1.09％),(1.04％),etc.The main components of benzene/ethanol extractives of fresh E.camaldulensis wood are not only abundant and healthy to human,but can also be used as bioenergy materials.
摘要：
Eucalyptus wood is mainly used for pulping．But water and other chemical aids ale severely wasted because the content of extractives is high．What’s worse,water pollution from the extractives is very serious in South China．Therefore，the benzene／ethanol extractives of E.camaldulensis wood meal were identified by Py-GC／MS．The main constituents were phenol，2-methoxy-4-(1-propenyl)-(6．33％)，phenol,2,6-dimethoxy-4-(2-propenyl)-(6．28％)，phenol,2，6-dimethoxy-(5．7％)，hexadecanoic acid(5．1％)，ethanone，1-(3-methoxyphenyl)-(5．09％)，ergosta-4，6，22-trien-3．beta．-ol(4-38％)，beta-sitostexol(4．05％)，etc．So the benzene／ethanol extractives can be used as biomedicine，bioenergy,and so on.
作者机构：
College of Materials Science and Engineering,Central South University of Forestry and Technology,P.R.China,410004
会议名称：
2008 International Seminar on Education Management and Engineering(2008教育管理科学与工程国际研讨会)
会议时间：
2008-09-22
会议地点：
成都
会议论文集名称：
2008 International Seminar on Education Management and Engineering(2008教育管理科学与工程国际研讨会)论文集
关键词：
engineering students;enterprise;forestry university in China;specialized practice
摘要：
In recent years, there is a steep rise in the number of engineering students from forestry universities in China. The harmonious cooperating system of specialized practice between universities and enterprises has been broken up, and the specialized practice of engineering students runs into plight. Based on many-year experience, this essay discussed the reasons of this situation dated from universities, enterprises, and engineering students themselves, and proposed the measures and approaches to improve the poor situation of specialized practice for engineering students, providing a foundation of cultivating students with high quality.
作者机构：
[Peng Wan-Xi; Wu Yi-Qiang; Zhang Dang-Quan] Cent S Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.;[Li Kai-Fu] South China Agr Univ, Coll Forestry, Guangzhou 510640, Peoples R China.
通讯机构：
[Peng Wan-Xi] C;Cent S Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.
会议名称：
The Fifth International Conference on Physical and Numerical Simulation of Materials Processing(第五届材料与热加工物理模拟及数值模拟国际会议)
会议时间：
2007-10-23
会议地点：
郑州
关键词：
Gas chromatography;Mass spectrometry;Red 1;NaOH Extractives;E. Urograndis
摘要：
The extractives from the fresh E. urograndis wood were obtained through red 1%NaOH solution. The chemical components for the extractives were identified by GC-MS. Relative content of each chemical component was determined by area normalization. Ninteen kinds of compounds representing 52.99% of the extractives which take on 36 peaks were identified. The result showed that the principal constituents were 9-octadecenoic acid (z)-, methyl ester (cas) (11.34%), 3-diphenyl-5-(3-methoxyphenyl)pyrrole(10.77%), hexadecanoic acid, methyl ester (cas) (6.23%), 9,12-octadecadienoic acid (z,z)-, methyl ester(6.16%), 9-octadecenoic acid (z)-, ethyl ester (cas) (3.17%), di-(9-octadecenoyl)-glycerol(3.14%), hexadecanoic acid, ethyl ester (cas) (1.93%), ethyl linoleate(1.81%), 3-acetoxychol-5-ene(1.62%), ethyl linoleate(1.60%), octadecanoic acid, methyl ester(1.05%)and so on. Therefore, this result reported in the present study for the first time provides the scientific basis for the further exploitation and development of E. urograndis wood. At the same time, the pollution prevention of the waste water of paper mill, wood industry would being realized from the results.
作者机构：
[Wu, Yiqiang; Zhou, Jianbo; Yan, Qing; Yuan, Guangming; Peng, Wanxi] Cent S Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.
会议名称：
2nd International Papermaking and Environment Conference
会议时间：
MAY 14-16, 2008
会议地点：
Tianjin, PEOPLES R CHINA
会议主办单位：
[Wu, Yiqiang;Yuan, Guangming;Peng, Wanxi;Zhou, Jianbo;Yan, Qing] Cent S Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.
关键词：
bamboo;fibre morphology;chemical components;paper and pulping;South China
摘要：
In order to explore the suitability on bamboo for pulping and papermaking, the fibre morphology and chemical components of five bamboo species, including Dendrocalamus barbatus, Gigantochloa sp., Bambusa blumeana, Dinochloa puberula and Phyllostachys pubescence, were determined and analyzed. The results indicates that: (1) Variation of fibre morphology in five species of bamboo takes on similar trends in their radical and longitudinal directions, with the exception of the ratio of fibre length to width. The changes in fibre length and width are middle > outside > inner side in the radial direction, and the fibre length, fibre width and the slenderness increase in longitudinal direction with height above ground upward. When reaching a certain maximum value, they begin decreasing gradually. (2) Compared to P. pubescence, the fibre morphology is more excellent, the content of holocellouse is higher and the content of lignin and various extractives (cold and hot water, organic solvents, 1%NaOH) are lower for G. sp. From the viewpoint of the performance index in paper and pulp and the pulping yield, it is conclude that G. sp. is the best, P. pubescence is the worst and other three species of bamboo vary in between those two. Based on the comprehensive evaluation, it is made apparent that all five species of bamboo are suitable for paper and pulping materials.
摘要：
Eucalypt, widely planted in south China, is the most potential tree species used for high value-added solid wood products supplanting natural forest. However, collapse-shrinkage characteristics in cells during heat-treatment process severely restrains its above-mentioned potenial. In order to explore the effects of heat-treatment patterns on the collapse-shrinkage characteristics, the total shrinkage and amount of collapse were measured by means of image analysis technique on wood from low-density plantation-grown eucalypt (Eucalyptus urophylla and E. grandis) and high-density ones (E. cloeziana and E. pellita) under continuous and intermittent heat-treatment conditions, respectively. The results showed that (1) with continuous heat-treatment temperature rising, the total shrinkage and collapse increase rapidly on low-density eucalypt, which was resulted from the instantaneous cell collapse in more wall-thickness fibre and parenchyma cells being transformed into the residual collapse, while slightly increase on high-density eucalypt, which may be brought on by only a few wall-thickness fibre cells and some parenchyma cells' collapse occurring; (2) with intermittent heat-treatment temperature increasing, except the total shrinkage and collapse increasing slightly on high-density eucalypt, while the total shrinkage and collapse in low-density eucalypt decrease rapidly, the main reasons are that, on one hand, the more fibre cells participating in instantaneous collapse occurance are easier to be recovered, while the parenchyma cells being concerned with instantaneous cell collapse development are more difficult to be recovered, on the other hand, the instantaneous collapsed cells under high temperature may last the shorter time whenever reducing 10% mc, it may be probable for the instantaneous collapsed wall-thickness fibre cells to be recovered and for the instantaneous collapsed parenchyma cells to be transformed into the residual collapse. Accordingly, we can draw a conclusion that the continuous heat-treatment pattern may be more suitably applied to high-density eucalypt wood, while intermittent heat-treatment pattern is fit for low-density eucalypt.
摘要：
Now industrialization of scientific research in university is not only slow, but also very much non-ideal because the project management of university's industrialization has no effective system of evaluation The datum comparison is important in the strategic planning of project management. It is an effective method to enhance the maturity and the achievements of project management. Influential role of datum comparison were determined. The six kinds of datum comparison were also analyzed in detail. So the datum comparisons would improve the level of project management and powerfully promote the development of the university's industrialization.
摘要：
The increasing demand for paper in Asia is being met by the use of Phyllostachys heterocycla to a large extent. However, some pulp mills may be forcedly closed because the Phyllostachys heterocycla chips contain extractives severely enough to pollute the water. In this paper, the chemical components in the benzene/ethanol extractives of fresh Phyllostachys heterocycla slub were isolated and identified by Py-GC/MS. The relative content of each component was determined by peak area normalization. 66 compounds in the extractives were identified. The mainly abundant constituents were stigmasterol (9.07%), trimethylamine (8.47%), phenol, 2, 6-dimethoxy-(7.93%), phenol, 3-(1methylethyl)-(5.5%), n-hexadecanoic acid (5.2%), 2-methoxy-4-vinylphenol (4.95%), 9, 12-octadecadienoic acid (Z, Z)-(4.56%), phenol, 2, 6-dimethoxy-4-(2-propenyl)-(4.48%), 2, 4, 7 (1H, 3H, 8H)-pteridinetrione (3.95%), phenol, 2-methoxy-(3.21%), benzofuran, 2, 3-dihydro-(2.79%), 9, 12, 15-octadecatrienoic acid, methyl ester (2.42%), glycine, N, N-dimethyl-, methyl (1.88%), DL-proline, 5-oxo-, methyl ester (1.84%), phenol, 2-methoxy-4-(1-propenyl)-, ( E)(1.65%), octadecanoic acid (1.44%), benzene, 4-ethenyl-1, 2-dimethoxy-(1.29%), phenol, 2-(1-methylethyl)-(1.24%), 1, 6, 10-dodecatrien-3-ol, 3, 7, 11-trimethyl-(1.19%), and so on. The most components from benzene/ethanol extractives of fresh Phyllostachys heterocycla slub are not only abundant and healthy to human, but also can be used as fine bioenergy.
作者机构：
Department of Wood Science and Technology, Central South Forestry University, changsha, China The Un;The United Graduated School of Agricultural Sciences, Ehime University, Japan;Department of Wood Science and Technology, Central South Forestry University, changsha, China;College of Forestry, Guangxi University, Nanning, China
会议名称：
The International Conference on Plantation Eucalyptus(桉树国际会议)
会议时间：
2005-12-01
会议地点：
广东湛江
会议论文集名称：
The International Conference on Plantation Eucalyp
摘要：
The effects of continuous and intermittent drying regimes on the total shrinkage and collapse have been investigated for six species of difficult-to-dry planted Eucalyptus timbers. The results have shown that total shrinkage and collapse in all eucalypt woods examined were greater for continuous drying than intermittent drying with the exception of an intermittent drying run based on change of relative humidity (RH). Periodic cycling of RH can lead to the increase of total shrinkage and collapse in green/saturated wood in higher drying temperature conditions (more men 60℃) rather than increasing collapse recovery and was especially obvious for lower-density eucalypts. Total shrinkage and collapse increase with increasing drying temperature, in both continuous and intermittent drying regimes, while the increasing magnitude of both parameters becomes apparently larger for continuous drying than for the intermittent drying regime, in particular for higher temperature conditions. However, it is possible to elevate drying temperature to reduce drying time for the intermittent drying regime. Increasing drying duration at each intermittent drying period had a greater effect on total shrinkage and collapse for all eucalypt wood examined. When a drying duration of six hours at an intermittent drying period is used, the differences in shrinkage and collapse between continuous and intermittent drying regimes are very slight. The duration of an intermittent drying period has a comparatively larger effect on total shrinkage and collapse for five lower-density eucalypt species, but a smaller effect on two higher-density eucalypts that were included in the study. Accordingly, we may draw a conclusion that an intermittent drying regime is very likely to be a potential drying practice for collapse-prone lower-density plantation-grown eucalypt timbers.
期刊：
2008 PROCEEDINGS OF INFORMATION TECHNOLOGY AND ENVIRONMENTAL SYSTEM SCIENCES: ITESS 2008, VOL 4,2008年:19-23
通讯作者：
Wu, Yiqiang
作者机构：
[Deng, Heping; Wu, Yiqiang; Peng, Wanxi; Tian, Wenli; Qing, Yan; Song, Ye] Cent S Univ Forestry & Technol, Coll Mat Sci & Engeering, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Wu, Yiqiang] C;Cent S Univ Forestry & Technol, Coll Mat Sci & Engeering, Changsha 410004, Hunan, Peoples R China.
关键词：
Phyllostachys pubescens Mazel ex H. de Lehaie;Py-GC/MS;acetone extractives;resource utilization
摘要：
In order to explore the effect of a large amount of extractives containing in moso bamboo (Phyllostachys pubescens) on both the environmental pollution and resource utilization in the process of industrialized utilization the chemical components of acetone extractive on fresh Phyllostachys pubescens shavings were separated and identified by means of Py-GC/MS under 590 degrees C He gas condition, and relative content of each component was determined by area normalization. It was found that the abundant constituents were lupan-3-one(8.27%), benzofuran, 2,3-dihydro-(8.08%), 2-furancarboxaldehyde, 5-(hydroxymethyl)- (5.97%), lup-20(29)-en-3-one (5.89 %), phenol, 2,6-dimethoxy-(5.71%), trim. ethylamihe(5.2%), phenol, 2,3,5,6-tetramethyl-(3.60%), nonadecane(3.46%), olean-12-ene(3.13%), carbon dioxide(2.98%), acetic acid(2.88%), phenol, 2-methoxy-(2.69%),.beta.-sitostero12.22 (%), 9,12-octadecadienoic acid (Z,Z)- (1.99%), hexadecanoic acid(1.85%), 2-propanone, 1-hydroxy-(1.67%), phenanthrene, 9,10-dihydro-(1.67%), 4H-pyran4-one, 2,3-dihydro-3,5-dihydroxy-6-methyl-(1.55%), phencil(1.52%), phenol, 2,6-dimethoxy4-(2-propenyl)- (1.46%), stigmasterol(1.46%), heptadecane(1.43%), phenol, 2-methoxy-4-(1-propenyl)- (1.33%), androstan-6-one, (5.alpha.)- (1.23%), alpha.-amyrin(1.12%), 2-pentanone, 4-hydroxy-4-methyl-(1. 10%), 1-butanone,.1-(2,4,6-trihydroxy-3-methylphenyl)-(1.10%), etc. Therefore, it can be concluded that some chemical components of acetone extractive in moso bamboo maybe aggravated the environmental pollution and other chemical components can become the important raw materials of the high-grade resource utilization.
作者：
Deng Heping;Ma Qingzhi;Peng Wanxi*;Zhang Dangquan;Wu Yiqiang
期刊：
ITESS: 2008 PROCEEDINGS OF INFORMATION TECHNOLOGY AND ENVIRONMENTAL SYSTEM SCIENCES, PT 2,2008年:896-901
通讯作者：
Peng Wanxi
作者机构：
[Wu Yiqiang; Deng Heping; Peng Wanxi] Cent S Univ Forestry & Technol, Sch Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Peng Wanxi] C;Cent S Univ Forestry & Technol, Sch Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.
关键词：
Biomedical components;Superheated water extractives;Phyllostachys heterocycla;GC/MS
摘要：
The chemical components from superheated water extractive of fresh Phyllostachys heterocycla shavings were separated and identified by GC/MS after enriched. Relative content of each component was determined by area normalization. 56 compounds of the extractives were identified. The main and abundant constituents were heptacosane, 14-a-H-pregna, Tetradecane, 2,6,10-trimethyl-, methyl 9,10-difluoromethylene-9-octadecenoate, 1,2-benzenedicarboxylic acid, dibutyl ester, 2,2,4-trimethyl-3- (3,8,12,16-tetramethyl-heptadeca-3,7,11,15-tetraenyl) -cyclohexanol, isochiapin B, tetradecane, 2,6,10-trimethyl-, dibutyl phthalate, etratriacontane, phosphoric acid, tributyl ester, silicone polymer, silicate anion tetramer, 2,3-dihydro-benzofuran, quercetin 7,3',4'-trimethoxy, 1-heptatriacotanol, etc. Therefore, the rare biomedicinal materials and rare spice is riched in the superheated water extractives of fresh P. heterocycla. The by-products can be used as bioenergy.
作者机构：
[Liu Qi-mei; Ma Qing-zhi; Peng Wan-xi; Wu Yi-qiang; Zhang Dang-quan] Cent S Univ Forestry & Technol, Sch Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Ma Qing-zhi] C;Cent S Univ Forestry & Technol, Sch Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.
会议名称：
The Fifth International Conference on Physical and Numerical Simulation of Materials Processing(第五届材料与热加工物理模拟及数值模拟国际会议)
会议时间：
2007-10-23
会议地点：
郑州
关键词：
Phyllostachys heterocycla;healthful function;superheated water extractives;gas chromatography;mass spectrometry
摘要：
The chemical components from superheated water extractive of fresh Phyllostachys heterocycla shavings were separated and identified by GC/MS after enriched. Relative content of each component was determined by area normalization. 31 compounds representing 99.99% of the extractives were identified. The main and abundant constituents were as: heptacosane (35.37%), 2,2,4-trimethyl-3- (3,8,12,16-tetramethyl-heptadeca-3,7,11,15-tetraenyl)-cyclohexanol (16.25%), isochiapin B (12.24%), tetradecane, 2,6,10-trimethyl- (cas) (7.59%), dibutyl phthalate (5.66%), etratriacontane (cas) (4.89%), 1,2-benzenedicarboxylic acid, bis(2-methylpropyl) ester (cas) (3.74%), phosphoric acid, tributyl ester (cas) (2.92%), silicone polymer (2.47%), silicate anion tetramer (2.43%), 2,3-dihydro-benzofuran (2.01%), quercetin 7,3',4'-trimethoxy (1.04%), 1-heptatriacotanol (0.98%) and so on. Most components of superheated water extractives of fresh Phyllostachys heterocycla are abundant and healthy to human, indicating that there are natural health elements in Phyllostachys heterocycla.
