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The results show: the strongest bond is the Al-Al bond in the segregated cell without containing vacancy, where the Al atomic covalence radius is greater than that of Li atom in the cell; while the strongest bond is the Al-Li bond in the segregated cell containing vacancy, and the Al atomic covalence radius in the cell is less than that of Li atom. Since the difference of electronagativity between the Al and Li atoms is obvious, it is inclined to formed the Al-Li segregated cell of short range order structure in the condition of vacancy present. The short range order structure containing vacancy is probably the embryo or precursor structure of the metastable phase δ′(Al3Li). Because the strongest covalent bond in the Al-Li-vacancy segregated cell in alloy formed in quenching is the main strength reason for supersaturated solid solution of alloy. The bond net of succeeding precipitation of δ′(Al3Li) has the picture of anisotropic Al-Al bonding and the bond intensity enhanced. Since the δ′(Al3Li) is coherence with matrix, the bond net strength is enhanced by the precipitation of δ′(Al3Li) and so strengthen the alloy.
计算结果表明:不包含空位的偏聚晶胞的键络最强键为Al—Al键,其中Al原子的共价半径较Li原子的共价半径要大;而含空位的偏聚晶胞的最强键为Al—Li键, Al原子的共价半径要比Li原子的共价半径要小;在空位存在的情况下,由于Al原子与Li原子的电负性相差明显,促使Al和Li原子结合,倾向形成Al-Li短程序结构偏聚区,这种含空位的短程序结构很可能就是δ′(Al3Li)亚稳相的前兆结构和生长胚胎;由于Al-Li-空位有序偏聚晶胞的Al—Li键络比基体键络要强许多,因此,淬火过程中合金生成的Al-Li-空位偏聚晶胞对合金过饱和固溶体起主要强化作用;后续析出的δ′(Al3Li)亚稳相键络各项异性显著,键络强度明显提高;由于Al3Li与基体共格,其大量均匀弥散析出起到提升基体整体键络强度,同样对合金产生强化作用。
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The results show: the strongest bond is the Al-Al bond in the segregated cell without containing vacancy, where the Al atomic covalence radius is greater than that of Li atom in the cell; while the strongest bond is the Al-Li bond in the segregated cell containing vacancy, and the Al atomic covalence radius in the cell is less than that of Li atom. Since the difference of electronagativity between the Al and Li atoms is obvious, it is inclined to formed the Al-Li segregated cell of short range order structure in the condition of vacancy present. The short range order structure containing vacancy is probably the embryo or precursor structure of the metastable phase δ'(Al3Li). Because the strongest covalent bond in the Al-Li-vacancy segregated cell in alloy formed in quenching is the main strength reason for supersaturated solid solution of alloy. The bond net of succeeding precipitation of δ'(Al3Li) has the picture of anisotropic Al-Al bonding and the bond intensity enhanced. Since the δ'(Al3Li) is coherence with matrix, the bond net strength is enhanced by the precipitation of δ'(Al3Li) and so strengthen the alloy.
计算结果表明:不包含空位的偏聚晶胞的键络最强键为Al-Al键,其中Al原子的共价半径较Li原子的共价半径要大;而含空位的偏聚晶胞的最强键为Al-Li键,Al原子的共价半径要比Li原子的共价半径要小;在空位存在的情况下,由於Al原子与Li原子的电负性相差明显,促使Al和Li原子结合,倾向形成Al-Li短程序结构偏聚区,这种含空位的短程序结构很可能就是δ'(Al3Li)亚稳相的前兆结构和生长胚胎;由於Al-Li-空位有序偏聚晶胞的Al-Li键络比基体键络要强许多,因此,淬火过程中合金生成的Al-Li-空位偏聚晶胞对合金过饱和固溶体起主要强化作用;后续析出的δ'(Al3Li)亚稳相键络各项异性显著,键络强度明显提高;由於Al3Li与基体共格,其大量均匀弥散析出起到提升基体整体键络强度,同样对合金产生强化作用。
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Results showed that L-THP possessed negative inotropic and negative chronotropic action, lowed left ventricular pressure and it's infinitesimal calculus, decreased heart output in per min., shorten 〓 and 〓 of action potential of ventricular papillary muscle of guinea pig and even the plate-phase of action potential disappeared in larger dose group , but prolonged 〓. we studied transmembrane transportation of 〓 after administering L-THP , L-THP not only depressed uptake and increased release of Ca 2+ in normal myocardium, but also it showed stronger inhibition in cell injured by ISO, and fully eliminated the effect of ISO increasing uptake and decreasing release of 〓. By detecting the 〓 content of ventricular single myocyte using fluorescent probe Fluo-3/AM, results correspond to that done above, L-THP decreased 〓 content inside of cell significantly. Using whole-cell mode, we observed the effect of L-THP on Ica in ventricular single cell, it was found that L-THP decreased Ica, the effect increased with increasing it's dose, and had voltage, frequency-dependency. Dose highly corelated to effect, corelative constant is 0.87. When washing cell with normal tyre's solution, Ica could recover, which proved the blocked action of L-THP on calcium channel once again. Meanwhile, L-THP reduced production of MDA in heart injured by ISO in dose-dependent manner, improved content of GSH-Px, in case tissue or cell free from free radical damage.
结果显示,该药物具有负性肌力和负性频率作用,降低左室压及其微分,终使每分心输出量减少;缩短豚鼠心室乳头肌动作电位时程的〓和APD〓,大剂量使动作电位平台消失,〓延长;同位素示踪法研究证实L-THP抑制〓摄取,促进〓释放,降低细胞内的〓含量;单通道水平的研究证实,L-THP减少豚鼠心室肌单细胞内向钙电流,且具有剂量,电压,频率依赖性,其作用易于洗脱,药物剂量与Ica也具有高度相关性(相关系数r为-0.87);L-THP还可抑制ISO损伤心肌组织所致的丙二醛含量增加,增加谷胱甘肽过氧化物酶的量,使组织细胞免受损伤。L-THP阻断L-型〓通道,抑制〓的摄取,促进〓的释放,降低细胞内〓含量L-THP作用的离子基础。
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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。
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In the course of establishing standard operating procedure, The temperature, time , the feasibility without decorticating and efficiency were investigated when alliinase was deactivated used a dry heating apparatus in tunnel type, but the efficiency can be achieved less than 70%, need to be improved; The reformative cribriform plate has been proved to be good in practice result in pulping enzyme-deactivated garlic without dehulling; The extraction efficiency achieved more than 90% when volumic ratio of 20% alcohol and water is 3 I 1 and 2:1 was adopted to extract alliin two times respectively; During exact filtration, the ratio of diatomite in precoating and filtration was 3% and 1% respectively, the losses of alliin adsorbed by diatomite in extraction solution were not remarkable. In the stage of alliin isolation by ion exchange resin, three simple and sensitive detected measures were successfully adopted to control the whole process; the efficiency of alliin isolation was similar to laboratory results; The alliin yield was over 50% in acidic fractions and the purity quotient of alliin achieved above 50% after drying; Furthermore, the phenomenon was found that losses of alliin were seriously affected by the temperature and time periods in concentration.
在制定中试生产标准操作规程中,考察了隧道式干热烘干机杀酶的温度、时间和效率,干热灭酶效率只能达到70%,待改进;改良的筛板使带皮打浆效果良好,证明非脱皮熟蒜打浆的可行性,减少了工序,降低了成本;提取过程中,20%酒精分别1∶3和1∶2提取2次,效率达90%以上;硅藻土板框过滤时,探索了精滤过程中提取液中预涂和过滤时硅藻土的比例分别为3%和1%,并考察硅藻土对蒜氨酸的吸附损失,滤液澄明度良好,蒜氨酸损失很少;在树脂吸附分离阶段,采用三种简便灵敏检测手段控制生产过程,分离蒜氨酸的效果与实验室一致,酸性流分中蒜氨酸收率可达50%以上,干燥后蒜氨酸纯度达50%以上;试验发现浓缩蒜氨酸洗脱液时温度和浓缩时间对蒜氨酸损失的具有很大影响。
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In this paper, we have proposed a flexible encryption blocks selection buyer-seller watermarking protocol integrated the RSA asymmetric encryption system and homomorphism mechanism to protect the ownership of digital contents and fit real life. And consider the secondhand transaction in the real life. We also propose a buyer-reseller watermarking protocol based on the flexible encrypt blocks selection buyer-seller watermarking protocol to offer a solution of secondhand transaction. In our scheme, it's more light data transport requirement than other schemes. All roles in protocol will benefit by their participation. Our scheme can overcome various of the known attacks and security problems in the buyer-seller watermark protocol, such as buyer's right problem, unbinding problem, piracy tracing problem, conspiracy problem, buyer's participation in the dispute resolution problem, man-in-the-middle attack problem and anonymous problem. Furthermore, the seller and arbiter can verify the buyer's watermark without decrypting it in our scheme.
本文除应用RSA非对称式加密与秘密同态机制,提出了一个符合现实生活中买卖交易行为、可弹性调整加密范围数位内容买卖浮水印协定,强化了目前研究中对於数位内容买-卖浮水印协定的安全性,并进一步的考量二手商品交易行为,在可弹性调整加密范围数位内容买卖浮水印协定基础上,提出一个结合数位内容二手买卖与盗版追踪的二手数位内容买卖浮水印协定,达到让参予买卖的角色可以在安全的情形下完成二手数位内容所有权的移转并从中获取相对应利益的目标的数位内容转卖浮水印协定来增强了目前数位内容买卖浮水印协定研究中对於二手交易欠缺之处,解决了数位内容买卖浮水印协定中所可能遭遇的重要安全性议题,如:买方权益、盗版追踪、资讯不连结、共谋、买方需要参与仲裁、中间者攻击及匿名性问题。
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It can be seen that mercury contents in sulfides of the density fractions are different from each other in the same coal, which implied that mercury is distributed in sulfide unhomogeneously. The reasons of the unhomogeneity of mercury distribution in sulfide may be that mercury exist in sulfide in form of submicrometer size individual mineral such as cinnabar, and not in form of solid solution in pyrite, or that in coal, there are multi-stage and multi-origin sulfides among which the distribution and modes of mercury are different from each other.
这种差异性说明煤中黄铁矿中汞的分布是不均匀的,这表明:汞在黄铁矿中可能不是以固溶体形式存在,而可能是以细小的呈机械包裹物的独立矿物形式赋存于黄铁矿中;或者煤中存在多期、多成因的黄铁矿,不同期次成因的黄铁矿间汞的分布和赋存状态具有差异性。
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Methods Thirty ASA Ⅰ~Ⅱ adult patients were randomly divided into 3 groups: group A was infused with 6% HES (20 mL/kg) in speed of 80~100 mL/3 min before operation followed by Ringer's lactate solution; group B was infused with 4% gelofusine; group C was infused with Ringer's lactate solution.
30例肾功能正常,ASAⅠ~Ⅱ级的择期胃肠手术患者随机分为3组,A组、B组和C组以80~100 mL/3 min的速度分别输入20 mL/kg的6%羟乙基淀粉、4%琥珀酰明胶和乳酸林格液进行AHHD,术中以乳酸林格液补充其余液体需要量。
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To compute the solution to the nonlinear equation of pressure in the Riemann problem for the pressure grdient equations, the Godunov scheme gives a reasonable approximate value for the exact solution. By using the Newton-Ruphson iteration method and some necessary computation, we get the inter-cell numerical flux directly.
为求压差方程黎曼问题中关于压力的非线性方程的解,Godunov格式给出一个合理的初始近似值,利用Newton迭代法和一些必要的计算得到格式中的数值流。
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Based on the analysis of The Magician of Lublin by Issac Bashevis Singer, the American Jewish writer, this thesis is to spotlight on the western spiritual puzzlement Jewish writers often concern themselves with, on the solution to their spiritual problems, and to discuss the universality of the solution in modern Western society.
本文通过对美国现代犹太作家艾·巴·辛格的小说《卢布林的魔术师》的解读,分析了现代犹太作家所关注的西方文化中的精神困惑,揭示出了作者在小说中探讨的精神困惑之出路对现代西方社会的普遍意义,并解释了其中包含的宗教因素的合理性。
- 推荐网络例句
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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。
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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
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The eˉtiology of hemospermia is complicate,but almost of hemospermia are benign.
血精的原因很,以良性病变为主。