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With the collapse model of chous and the modified PER theory, one dimension calculation was obtained to describe the process such as liner collapse, jet formation, jet stretch and penetration of different explosive filled structure by Matlab tool and good result was attained.

采用周培基的压垮模型和改进的PER理论，针对不同装药结构的药型罩借助Matlab语言实现了药型罩压垮、射流形成、射流拉伸、侵彻等过程的一维数值计算，获得了较好的计算结果。

Results Cefoperazone/Sulbactam, Imipenem, Piperacillin/Tazobactam, Cefetamet and Quinolones had strong effects to resist Chromobacterium violaceum,while resistant effects of those antibiotics were not significant, including Ampicillin, Cefazolin, Gentamicin, Tobramycin, Aztreonam, Ceftriaxono, and Ceftazidime.

结果 12种抗菌药物中舒普深、亚胺培南、特治星、马斯平及喹喏酮类抗菌药物对紫色色杆菌均有较强的抗菌作用，而氨苄西林、头孢唑啉、庆大霉素、妥布霉素、氨曲南、头孢曲松和头孢他啶等抗菌药物抗菌效果不佳。

In this paper,sand culture experiment was carried out to study the effect of cinnamic acid,p-hydroxybenzoic acid stress on photosynthesis of cucumber seedlings.

采用砂培试验研究了有机肥对外源自毒物质苯丙烯酸、对羟基苯甲酸胁迫下黄瓜光合作用的影响。

The antimicrobial susceptibility test showed that various pathogens had high resistant rate to penicillins and cephalosporins, but sensitive to Imipenem with a sensitive rate of 80%. The sensitive rate of the gram-positive cocci to Vancomycin was more than 85%.

药敏结果显示各种病原菌对青霉素类及头孢类抗生素有较高的耐药率，而对亚胺培南-西司他丁有较高的敏感率，达80%以上，革兰阳性球菌对万古霉素敏感率达85%以上。

Nutrition solution culture, ICP-AES, the differential centrifugation technique and sequential chemical extraction method, suppression subtractive hybridization , RAPD were used in this thesis to study the mechanisms of copper tolerance and accumulation by Commelina communis grown in copper mine deposit which was reported to be a Cu hyperaccumulator, compared with C.

论文以本实验室报道的生长于矿山上的铜超富集植物鸭跖草和生长于正常土壤中的鸭跖草为试验材料，分别运用溶液培养法、ICP-AES元素测定技术、差速离心法和化学试剂逐步提取法、抑制消减杂交技术、RAPD技术研究了矿山和非矿山两种生境鸭跖草对铜的耐性和吸收积累的差异，两种生境鸭跖草在铜胁迫下养分吸收和积累的差异，两种生境鸭跖草在铜胁迫下生理反应的差异，以及铜在鸭跖草细胞内的分布及结合形态研究，矿山鸭跖草差异表达的cDNA克隆，铜对鸭跖草种群遗传分化的影响，从这几个方面探讨了矿山鸭跖草对铜的耐性机理。

Nutrition solution culture, ICP-AES, the differential centrifugation technique and sequential chemical extraction method, suppression subtractive hybridization , RAPD were used in this thesis to study the mechanisms of copper tolerance and accumulation by Commelina communis grown in copper mine deposit which was reported to be a Cu hyperaccumulator, compared with C. communis grown in normal soil. Several aspects were examined, including: difference of copper tolerance and accumulation between C. communis grown in copper mine deposit and that grown in normal soil; difference of growth and nutrient accumunation between C. communis grown in copper mine deposit and that grown in normal soil under copper treatment; physiological differences between between C. communis grown in copper mine deposit and that grown in normal soil under copper treatment; subcellular distribution and chemical forms of Cu in C. communis; identification of cDNA fragments differentially expressed in C. communis grown in copper mine deposit; genetic diversity and copper tolerance of C. communis, tolerance mechanisms to copper in C. communis are discussed.

中文题名鸭跖草对铜的耐性机理和富集特征研究副题名外文题名 Mechanisms of Cu tolerance and accumulation by Commelina communis 论文作者廖斌导师蓝崇钰束文圣学科专业环境科学研究领域\研究方向学位级别博士学位授予单位中山大学学位授予日期2003 论文页码总数128页关键词重金属污染植物修复超富集植物土壤污染铜污染鸭跖草馆藏号BSLW /2003 /X53 /12 论文以本实验室报道的生长于矿山上的铜超富集植物鸭跖草和生长于正常土壤中的鸭跖草为试验材料，分别运用溶液培养法、ICP-AES元素测定技术、差速离心法和化学试剂逐步提取法、抑制消减杂交技术、RAPD技术研究了矿山和非矿山两种生境鸭跖草对铜的耐性和吸收积累的差异，两种生境鸭跖草在铜胁迫下养分吸收和积累的差异，两种生境鸭跖草在铜胁迫下生理反应的差异，以及铜在鸭跖草细胞内的分布及结合形态研究，矿山鸭跖草差异表达的cDNA克隆，铜对鸭跖草种群遗传分化的影响，从这几个方面探讨了矿山鸭跖草对铜的耐性机理。

Empedocles' philosophy is best known for being the origin of the cosmogenic theory of the four classical elements.

恩培多柯勒的哲学由于四根说的宇宙发生论最为知名。

The different explants, hypocotyl, terminal bud, cotyledonary node, seedling were studied to induce bud or callus with different concentrations of 6-BA and to establish a better system for transformation.

利用大豆不同品种的下胚轴、顶芽、子叶节、原位再生等几种外植体进行诱导植株再生的实验，并通过添加不同浓度的6-BA来观察诱导愈伤组织和出芽的情况，为下一步的转化实验建立一个良好的组培平台。

Cruciferae vegetable crop s were chosen to compare their resistance to cadmium contamination because of many hyper-accumulation plant species reported belong to this family.

选择目前报道富集植物相对比较集中的十字花科蔬菜作物，采用室内水培方法，观察镉对种子萌发及早期幼苗生长的抑制程度，确定其毒性效应。

ObjectiveTo analyze constituents of volatile oil from Dictamnus dasycavpus.

作者：吴琴，叶冲，宋培浪，韩伟白鲜皮；，，挥发油；，，固相微萃取；，，气相色谱/质谱联用摘要：目的分析白鲜皮挥发油成分。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐