淳安县林业骨干苗圃建设的探讨

林业骨干苗圃的建设，是发展“一优二高”林业的物质基础，针对淳安县林业骨干苗圃的建设，科学地确定了建设的原则和规模，并对目前骨干苗圃的建设形式及存在问题提出了一些建议。     

1994年采自新疆的真菌鉴定报告

记述了１９９４年采自新疆布尔津，贾登玉，南山林场等地部分植物寄生真菌的３５个种。从采集的标本中初步鉴定出３５个种，其中白粉菌１６种，锈菌１３种，其他菌类６种。其中有５个种为新疆新记录，并对其进行了较详细的特征描述。     

南京裂爪螨种群消长与生态因子关联分析

研究结果表明:4个生态因子与南京裂爪螨(Schigotetranychusnanjingensis)卵量消长的关联序为湿度>天敌>降雨>气温;与幼、若、成螨量关联序为湿度>降雨>气温>天敌;与整个种群数量关联序为湿度>降雨>天敌>气温.     

生物源杀虫剂菜喜对菜蛾的药效测定

菜蛾(Plutella xylostella L.)是我国分布极广的重要十字花科蔬菜害虫,目前,该虫在哈尔滨地区对有机磷和拟除虫菊酯类药剂已产生抗药性,导致防效很差.为此,寻找高效低毒的更新换代农药防治此虫已是生产所必需.     

成功的启示——南京奶业(集团)公司经营分析

南京奶业 (集团 )公司扭亏为盈 ,并取得骄人业绩的启示是 :企业正确定位 ;实行企业 (集团 )经营的公司型运作方式 ;实行低成本扩张和品牌战略 ;引进国外先进技术设备 ,走与国际奶业接轨的发展道路 ;改善产业结构 ,实行多元化经营。     

职业教育投入现状及结构优化的对策研究——以泰州地区为例

当前泰州职业教育的经费投入结构单一,已经成为事业发展的最大障碍。优化职业教育投入结构,完善职业教育经费保障机制,这既是泰州职业教育率先发展、内涵发展的必然追求,也是职业教育积极主动服务经济社会发展转型升级的根本保证。     

香根鸢尾挥发油的化学成分分析及抗菌活性研究

采用GC-MS技术分析了新鲜的和自然陈化的鸢尾挥发油的化学组成,确定了各种成分的化学结构与GC含量,并采用滤纸片琼脂平板扩散法与微量肉汤稀释法针对3种真菌和12种细菌(包括7种临床致病菌)进行了挥发油的药敏实验。结果表明:新鲜鸢尾挥发油共鉴定出26种成分,占总峰面积的92.09%,由醛类、酮类、酸类、酯类等化合物组成,其中十四酸(31.77%)、己酸(15.33%)、3-甲基丁酸(12.20%)、戊酸(9.29%)、庚酸(7.91%)、3-甲基戊酸(7.25%)、辛酸(2.44%)、2,4′-二羟基-3′-甲基苯乙酮(1.04%)是主要成分;自然陈化3年鸢尾挥发油共鉴定出45种成分,占总峰面积的85.63%,主要由醛类、酮类、酸类、酯类、醇类、酚类等化合物组成,其中十四酸(28.02%)、十四酸乙酯(10.42%)、(Z,Z)-9,12-十八碳二烯酸(7.67%)、十二酸(6.41%)、己酸(5.14%)、十六酸(4.44%)、十二酸乙酯(4.09%)、亚油酸乙酯(3.87%)、十六酸乙酯(3.13%)、油酸乙酯(2.85%)、6-甲基-α-紫罗兰酮(1.39%)、n-癸酸(1.31%)是主要成分;新鲜鸢尾挥发油对大部分微生物均具有很好的抗菌作用,其最低抑菌浓度(MIC)为0.25g/L,最低杀菌浓度(MBC)为0.35g/L;自然陈化3年鸢尾挥发油对大部分微生物均具有很好的抗菌作用,其MIC为0.05g/L,MBC为0.08g/L。     

Effects of berberine on IL-1 or tumour necrosis factor induced polymorphonuclear leucocyte－endothelium adhesion

AIM:To investigate the effect of berberine on IL-1 or tumour necrosis factor (TNF) induced polymorphonuclear leucocyte(PMN)-endothelium adhesion and adhesion molecules.METHODS:Based on the model of human umbilical vein endothelial cell (HUVEC), this study adopted Rose Bengal Stain, cell ELISA, immunocyto-chemical techniques to investigate the effect of berberine on PMN-endothelium adhesion and the expression of cell adhesion molecules (CAMs).RESULTS:Berberine inhibited IL-1, TNF-induced HUVEC adhesion for PMN when pretreated HUVEC and antagonised IL-1, TNF-induced upregulation of ICAM-1 on HUVEC. Meanwhile, TNF-stimulated PMN adhesion for HUVEC and CD18 upexpression on PMN was diminished in the presence of berberine.CONCLUSION: Inhibite PMN-endothelium adhesion by downregulating the CAMs expression to inhibite PMN migration across endothelium is one of the mechanisms of antiinflammation of berberine.     

Polyamines enhance chilling tolerance of cucumber (Cucumis sativus L.) through modulating antioxidative system

Cucumber chilling-resistant cultivar Changchun mici and -sensitive cultivar Beijing jietou were used in this study to investigate the effects of exogenous PAs on protection against chilling injury as well as on changes of physiological features, and the fluctuation of free PAs content in the leaves under chilling stress. Upon chilling treatment, free spermidine (Spd), spermine (Spm) and putrescine (Put) were remarkably induced in the leaves of cv. Changchun mici 1 day after treatment. The induction of Put declined thereafter, whereas Spd and Spm levels increased steadily. In the leaves of cv. Beijing jietou, Put content was increased only at 1 day after chilling while Spd content decreased significantly upon chilling treatment. Chilling reduced soluble protein content, and decreased the activities of antioxidant enzymes, including superoxidase dismutase (SOD), peroxidase (POD), catalase (CAT) and ascorbate peroxidase (APX) only in Beijing jietou. However, these changes could be renovated by exogenous application of Put and Spd. It was also found that pretreatment with Put and Spd diminished the increased electrolyte leakage and malondialdehyde (MDA) content caused by chilling in the leaves of both cultivars. Pretreatment of methyglyoxal-bis-(guanylhydrazone) (MGBG), the PAs biosynthetic inhibitor cancelled the effects of PAs in most of the treatments. Moreover, histochemical staining and quantitative measurements showed that exogenous application of Put and Spd eliminated but MGBG exaggerated the hydrogen peroxide (H₂O₂) accumulation caused by chilling stress, especially in leaves of Beijing jietou. Interestingly, Changchun mici was found to contain higher endogenous free PAs contents compared to Beijing jietou. While no significant difference of SOD, POD and CAT activities was found between non-chilling Changchun mici and Beijing jietou seedlings, the former exhibited higher APX activity than the latter. These results suggest that PAs play important roles in the tolerance of cucumber against chilling stress, which is most likely achieved by acting as oxidative machinery against chilling injury.