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.
摘要：
The rheological analysis on dynamic shear rate-viscosity relationship of tea-oil extracted from tea-oil tree seeds by supercritical extraction method was carried out at gradient temperatures and constant shear rate, respectively. The results show that at 20, 40, 60 and 80°C, once the shear rate increases gradually, the torque enlarges correspondingly, while the viscosity shows little difference. However, at the constant shear rate, the rising temperature results in a steady downtrend on tea-oil viscosity. This results reveal that tea-oil viscosity is not closely correlated with shear rate at constant temperature, yet negatively correlated with temperature at constant shear rate.
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.
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.
