α—蒎烯等离子体聚合反应机理研究

应用ＧＣ－ＭＳ、ＰＧＣ－ＭＳ、ＥＳＲ和ＩＲ等分析方法测定了α－蒎烯等离子体聚合过程中气相产物的组成及其聚合物结构。根据分析结果，提出α－蒎烯等离子体聚合机理是自由基聚合反应机理。     

松油醇生产中副产物化学组成及分离利用的研究

用ＧＣ和ＧＣ－ＭＳ方法研究了同醇副产物的化学组成，鉴定其主要成分为α－蒎烯、莰烯、月桂烯、α－松油烯、双戊烯（柠檬烯）、１，８－桉叶油素、γ－萜品烯、萜品油烯等单萜类化合物以及少量的松油醇类。根据组成特点，对主要组分的分离技术及副产物气相脱氢芳化成对伞花烃的过程进行了研究 。     

望春玉兰精油化学成分研究

采用水中蒸馏法蒸取木兰科植物望春玉兰的花蕾（辛夷）和鲜花的精油，用ＧＣ面积归一化法和ＧＣ／ＭＳ定性法进行其化学成分的定性和定量研究。结果表明：望春玉兰花蕾含油量高达３．１％，有独特香气，主含α－蒎烯、桧烯、柠檬烯、桉叶油素、松油醇、依兰油烯和桉叶醇等成分，总量占全油９３％以上。鲜花含油量约０．２％，香气宜人，主含α－蒎烯、桧烯、月桂烯、桉叶油素、松油醇、乙酸松油酯和依兰油烯等成分，总量占全油９５％     

高阿丁枫鲜叶精油化学成分

从云南乡土树种高阿丁枫鲜叶中提取精油，经ＧＣ／ＭＳ／ＤＳ定性、定量分析，鉴定了其中４０个化学成分，为精油总量的９３．４１％，主要成分为蒎烯和水芹烯。经评香鉴定，该精油有一定利用价值。     

超临界二氧化碳萃取砂仁精油化学成分的研究

广西阳春砂仁、经超临界的萃取得到砂仁精油。用ＧＣ－ＭＣ对精油进行化学成分研究，鉴定了十三个组分，主要是乙酸龙脑酯（６２．３３％）、樟脑（１８．１４％）、龙脑（５．３８％）、莰烯（４．６５％），还有柠檬烯、α＝蒎烯等。     

九嶷香杉精油的化学成分

采用气相色谱－质谱－计算机（ＧＣ／ＭＳＤ）联用技术．首次研究了九嶷香杉精油的化学成分，鉴定出３８种化合物．主要成分为柏木脑（ｃｅｄｒｏｌ）２４．８％，α－蒎烯（α－ｐｉｎｅｎｅ）１７．５％，柏木烯（α－ｃｅｄｒｅｎｅ）１３．２５％，γ－荜澄茄烯（γ－ｃｅｄｉｎｅｎｅ）７．５％，柠檬烯（ｌｉｍｏｎｅｎｅ）３．５５％，榄香烯（ｅｌｅｍｅｎｅ）３．２％．其次是α－檀香烯（α－ｓａｎｔａｌｅｎｅ），β－檀香醇（β－ｓａｎｔｎｌｏｌ），月桂烯酸（ｍｙｒｃｅｎｏｌ），１．８－桉叶素（１．８－ｃｉｎｅｏｌｅ）等化合物．此外，本文还报道了在杉木精油中首次发现的２１种化合物．     

α－蒎烯均共聚研究新进展

分析评价了α－蒎烯均聚和共聚反应及其产物应用研究的概况，特别是１９９１年以来研究的新进展。结果表明，复合引发体系是制备高收率和高分子量（软化点）α－蒎烯聚合物的性能优良的引发体系；经臭氧化－层析法分离分析，说明采用复合体系可在较宽松的条件下（如α－蒎烯投料比≥５０％，苯乙烯转化率＜１００％）合成纯α－蒎烯／苯乙烯共聚物，并能通过控制聚合反应制备高α－蒎烯组分含量的共聚物。     

化学气相沉积法修饰13X分子筛上α－蒎烯的异构化反应

用经化学气相沉积法（ＣＶＤ）修饰的一系列１３Ｘ分子筛催化ａ－蒎烯的异构化反应。发现随着ＣＶＤ处理时间的增加，ＳｉＯ＿２沉积量增加，烯的选择性提高。     

化学气相沉积法修饰13X分子筛上α—蒎烯的异构化反应

用经化学气相沉积法修饰的一系列１３Ｘ分子筛催化α－蒎烯的异构化反应。发现随着ＣＶＤ处理时间的增加，ＳｉＯ２沉积量增加，烯的选择性提高。     

挪威云杉幼树韧皮部挥发性物质的测定

通过GC－MS测定挪威云杉幼树主干上部与下部韧皮主要挥发性物质的化学成分与含量，结果表明：挪威云杉幼树的韧皮部挥发性物质的主要成分为α－蒎烯、茨烯、β-蒎烯、月桂烯、3－蒈烯、柠檬烯、β－水芹烯7种单萜化合物。α-蒎烯、β－蒎烯、月桂烯、3－蒈烯、β－水芹烯的含量在上部韧皮与下部韧皮有明显差异，其中上部韧皮部α－蒎烯、β－蒎烯和β－水芹烯的含量明显高于下部主干韧皮部，这为解释松树皮象的取食习性，打下了基础。     

The population structure and sex ratios of Bursaphelenchus xylophilus under a-pinene stress

Pine wood nematode(PWN), Bursaphelenchus xylophilus, is a serious pathogen of pines throughout the world. Previous work indicated that different concentrations of a-pinene could affect nematode reproduction,however the mechanism of that influence is not clear. In order to examine the reproductive strategies of PWN in response to the stress of the volatile material a-pinene, we investigated different aspects of population changes of B.xylophilus under two concentrations of a-pinene. The results show that a high concentration(214.5 mg ml-1)promoted population growth while a low concentration(56.33 mg ml-1) decreased the population. Population structure was analyzed and it was found that a high concentration of a-pinene decreased the percentage of adults but increased the percentages of larvae and eggs.Furthermore, from the results of an evaluation of sex ratios(female/male), it was determined that a high concentration could elevate sex ratios but a low concentration decreased ratios sharply. These results suggest that the PWN could regulate its population by changing sex ratios under stress of a-pinene. This study has provided a theoretical basis for the prevention and control of pine wilt disease caused by the pine wood nematode.     

Evaluation of dried-wood odors: comparison between analytical and sensory data on odors from dried sugi (<Emphasis Type="Italic">Cryptomeria japonica</Emphasis>) wood

The emissions of volatile organic compounds from air-dried, conventionally dried, and high-temperaturedried sugi wood were compared by gas chromatographymass spectrometry. Terpenes were clearly the main compound group in the air-dried wood samples, whereas acetic acid was only detected in the high-temperature-dried wood samples, indicating that considerable changes occurred in the volatile compound emission profile during hightemperature processing. The most abundant compounds in the air-dried wood and conventionally dried wood were δ-cadinene, α-muurolene, and β-cadinene (sesquiterpenes) for all specimens, and a-pinene and D-limonene (monoterpenes) for conventionally dried wood and air-dried wood. In contrast, acetic acid was detected only in the hightemperature-dried wood. Sensory evaluation of volatile organic compounds was performed by 18 male university students. Volatile compounds of air-dried wood and conventionally dried wood were assessed as being significantly more soothing than those from high-temperature-dried wood. This study was presented in part at the 57th Annual Meeting of the Japan Wood Research Society, Hiroshima, August 2007     

几种杨树树皮中酚甙和酚酸类化合物的初步研究

从毛白杨等四种树皮的热水浸提物中分离出二种酚甙结晶,经熔点测定、元素分析、薄层色谱、红外光谱、质谱等手段鉴定为水杨甙(Salicin)和杨属灵(Pop-ulin)。对树皮中的酚酸也用高效液相色谱进行分析,发现上述树皮中含有对-羟基苯甲酸等五种酚酸。     

ANALYSIS OF CHINESE LARCH (L.GMELINI)SCMP BLEACHABILITY

Experimentaldatarevealedthattherelativeratiosofmajorpo1ysaccharidecontentswereasfOllows'arabin(Ar.):xylan(Xy.)'galactosan(Gal)'mannan(Man)'glucosan(Glu)=l.oo:2.8o.5.5l.7.-o4f2l.82.Underthesulfonationconditionsinvolx:ed-dissolvingrateswereobservedtobefGal.>Ar.>Man.>Xy.xG1u.Dissolutionofligninbehaveddifferentlywthdifferentsulfonationtemperatures.C,forn1ulasforL.gmeliniheartwoodandsapwoodmilledwoodlignin(MWL)wereC,H,95O,87(OCH,51andC,H,.,o,oo(OCH,),.,'respectively.Itwasfoundthatthecarb…     

Characterization of different wood samples using a new combined method of evolved gas analysis and pyrolysis–gas chromatography/mass spectrometry

Evolved gas analysis (EGA) in combination with analytical pyrolysis is presented as a new technique for rapid investigations into wooden materials. In a first analytical step, the thermal behaviour of three wood samples was determined by EGA. Based on these results, analytical pyrolysis–gas chromatography/mass spectrometry was carried out to investigate the influence of wood-specific thermal behaviour and the chemical composition on the results. Furthermore, the influence of sample mass and particle size was examined.     

云南香荚兰挥发性成分研究

采用同时蒸馏萃取方法收集香荚兰挥发性成分,对所得的香荚兰挥发性成分二氯甲烷浓缩液用GC/MS分离,并分析鉴定其成分及质量分数,共鉴定出49个化合物,占总峰面积的79.63%。     

异长叶烯自氧化主产物的结构

通过元素分析、红外、紫外和质谱测定确认异长叶烯(2)自氧化主产物的结构为9-氧代异长叶烯(4),并讨论了质谱碎片离子峰的开裂过程。     

Chemical emissions from adhesive-bonded wood products at elevated temperatures

Pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) was employed to examine the chemical emissions from the glued wood samples at elevated temperatures (150, 200, 250, 300, 350, 400, 450, and 500°C). Two wood species, Douglas-fir (Pseudotsuga menziesii) and southern pine (Pinus palustris), one structural adhesive, phenol–resorcinol–formaldehyde (PRF), PRF-bonded Douglas-fir, and PRF-bonded southern pine were evaluated. The volatile compounds with a mass range of 35–300 m/z emitted from the pyrolysis samples were separated by gas chromatography (GC) and identified by mass spectrometry (MS). The results indicated that compared to neat wood and resin film samples, several additional pyrolysis products were observed for the PRF-bonded wood samples including (1) acetaldehyde and butanedial for PRF-bonded Douglas-fir and (2) acetaldehyde, furfural, 2-furanmethanol, butanedial, 2,3-butanedione, cyclopropyl carbinol, 1,2-benzenediol, and 1-(acetyloxy)-2-propanone for PRF-bonded southern pine. These additional compounds were possibly associated with the interaction between wood and PRF resin. The results also indicated that bonded wood products would be less thermally stable than those of neat wood and PRF resin samples.     

迷迭香提取物检测方法研究进展

介绍了迷迭香提取物的种类,综述了迷迭香提取物的分析测定方法,主要包括高效液相色谱法、胶束电动色谱法、紫外光谱分析法、红外光谱分析法、毛细管电泳法、气相色谱法、质谱法、核磁共振波谱法等,并比较了各种方法在使用上的差别.