固相萃取/毛细管气相色谱法测定肉桂皮中六六六、滴滴涕农药残留量

研究了肉桂皮中六六六、滴滴涕农药残留量的测定方法。以丙酮-石油醚混合溶剂为提取剂,旋涡振荡提取,采用固相萃取技术对提取液净化,优化洗脱溶剂的比例和用量,用气相色谱/微电子捕获检测器（μECD）测定。在优化条件下,BHC及DDT农药在10~1 000 μg/L质量浓度范围内线性关系良好,相关系数为0.995 8~0.998 1。2种农药在肉桂皮中的加标回收率为 92.1%~112%,相对标准偏差（RSD）为2.8%~8.1%,方法的检出限（LODs）为5.0×10-3~2.4×10-2 mg?kg-1,定量下限（LOQs）为1.3×10-2~6.0×10-2 mg?kg-1。方法具有简单、灵敏、选择性高、重现性好等优点。     

Cinnamomum cassia: an implication of serotonin reuptake inhibition in animal models of depression

The aim of the study was to explore the traditional use of Cinnamomum cassia against depression. The standardised methanolic extract of the bark of C. cassia was evaluated for antidepressant activity using various behavioural tests, i.e. tail suspension test (TST), forced swim test (FST) and locomotor activity test. The serotonergic and noradrenergic modulation was assessed using 5-hydroxytryptophan (5-HTP)-induced head twitches and yohimbine potentiation tests, respectively. The fluoxetine and phenelzine were used as positive controls in the study. The C. cassia extract significantly decreased the immobility time in TST (maximum effective dose tested was 50 mg/kg) while no effect was observed in FST and locomotor activity test. The extract significantly increased the 5-HTP-induced head twitches while yohimbine-induced lethality remained unaltered. The aforementioned results are similar to that caused by fluoxetine. The standardised methanolic extract of C. cassia demonstrated antidepressant activity that can be attributed to rise in serotonin levels.     

珀金法合成肉桂酸的条件研究

研究了珀金法合成肉桂酸的反应，探讨了原料配比，反应时间，催化剂用量等参数对产率的影响，得到了较佳的合成配比条件。     

肉桂中有机锗的分光光度法测定

本文对肉桂中有机锗进行了分光光度法研究，研究表明，肉桂中含有丰富的有机锗，本方法简便可靠，可获得满意的分析结果。     

少花桂幼苗对不同光照条件的适应性研究

研究了少花桂幼苗对不同光照条件在形态和生理方面的适应．研究结果表明,随着生境中光照的减弱,植株叶片增大、叶色加浓、光饱和点、光补偿点逐渐下降,Ｃｈｌｂ含量升高,以保持一定的光合速率,适应弱光环境．但过度遮荫导致二氧化碳补偿点提高,固定二氧化碳能力减弱．     

少花桂小孢子发生和雄配子体的发育过程

利用传统石蜡切片技术对少花桂（Cinnamomum paueiflorurn）小孢子发生和雄配子体发育过程进行了研究，结果表明，花药含4个小孢子囊，药壁发育为基本型，绒毡层属单型起源，细胞多具双核，于减数分裂时发生解体并流入花药腔内，至雄配子体早期，绒毡层细胞被发育的花粉吸收殆尽，属变形绒毡层.发育过程中药层内壁在内径向、切向壁上均发生U型或V型加厚，表皮细胞减缩退化，花粉母细胞经连续的胞质分裂后多形成左右对称形四分体，成熟花粉粒多为2-细胞花粉粒.     

海滨锦葵的耐冷性及低温弱光对其光系统的伤害

以海滨锦葵为实验材料,研究不同低温处理对海滨锦葵光合作用的伤害,探求海滨锦葵对低温胁迫的敏感温度,以及低温弱光对海滨锦葵的伤害．结果表明：在低温胁迫下,海滨锦葵的净光合速率（Pn）、光系统II实际光化学效率（ФPSII）、最大光化学效率（Fv／Fm）显著下降,说明随着温度的降低,海滨锦葵光化学活性受到抑制,13℃是其低温胁迫下的临界温度．低温弱光（6℃、200μmol·m^-2s^-1）处理4h后Fv/Fm下降了2．5％,而光系统I活性（△I／I0）下降了18．5％,说明在低温弱光条件下,海滨锦葵光系统I受到的伤害高于光系统II;在恢复过程中,光系统II在8h基本完全恢复,而光系统I和净光合速率在48h后仍没有恢复到正常水平,说明PSI的恢复速率成了光合作用的主要限制因素．     

银木和樟树遗传多样性与亲缘关系的RAPD分析

利用RAPD技术分析银木和樟树的遗传多样性与亲缘关系.用筛选出的12条引物从7株银木和7株樟树中共扩增得到91条DNA带,其中多态性条带48条,多态性条带比率为52.7%.根据Nei-Li方法进行的遗传相似性分析表明,银木植株间的遗传相似性系数在0.457～0.781,平均为0.564;樟树植株间的遗传相似性系数在0.646～0.862,平均为0.777;银木与樟树间的遗传相似性系数在0.318～0.531,平均为0.422.根据RAPD结果进行的聚类分析正确地将银木与樟树各聚为一类.这些数据说明银木植株间的遗传多样性大于樟树植株间的遗传多样性,银木与樟树之间的亲缘关系小于两种植物内部个体间的亲缘关系.     

Cinnacassides A-E, five geranylphenylacetate glycosides from Cinnamomum cassia

Cinnacassides A-E (1-5), five novel glycosides with a unique geranylphenylacetate carbon skeleton, were isolated from the stem bark of Cinnamomum cassia. Each of the cinnacassides A-D (1-4) possesses one of the four stereoisomers in the aglycone. Their structures were established by extensive spectroscopic analysis and chemical and chiroptical methods. A plausible biosynthetic route to 1-5 was also proposed.     

Rapid Extraction of Essential Oil from Dried Cinnamomum cassia Presl and Forsythia suspensa(Thunb.)Vahl by Ionic Liquid Microwave Extraction

Ionic liquid (IL) was used as the microwave absorption medium to extract essential oils from dried Cinnamomum cassia Presl and Forsythia suspensa (Thunb.) Vahl, and the ionic liquid microwave extraction (ILME) was developed. Some experimental parameters for ILME were examined. The proposed method was compared with other methods, including hydrodistillation (HD), microwave hydrodistillation (MHD), solvent‐free microwave extraction (SFME) and improved solvent‐free microwave extraction (ISFME). Experimental results showed that compared with other extraction methods the ILME had some advantages, such as time‐saving, simplicity and usage of green solvents. The extraction time was less than 18 min at the microwave power of 440 W and 1.5 mL of ionic liquid was required. The constituents of essential oils obtained by the five methods are not obviously different.