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关键词： BIOCHEMISTRY   PERIODICALS  

摘要： Presents corrections on an article on F-actin interaction with intact talin and talin head and tail fragment by W.H. Goldmann, Z. Guttenberg, S. Kaufmann, D. Hess, R.M. Ezzell and G. Isenberg in the 'European Journal of Biochemistry,' vol. 250, no. 2.

关键词： 网上售书合同   合同形式   法律完善   格式合同   合同订立   合同成立   法律效力  

摘要： 如今图书网上销售如火如荼,在新浪网上输入"网上书店",可以搜索到175家中文网上书店,其中不乏我们熟知和经常光顾的.网上图书销售在带给人们方便、优惠的同时,也暴露出不如人意的一面,如交易条款欠缺买卖合同的必要条款或显失公平,有时订单得不到满足,出现纠纷顾客很难维护自身合法权益等.这其中当然有我国电子商务发展水平较低、社会配套服务尚不完善、法律调整滞后等原因,但一些网上书店在某种程度上对合同的疏忽也是重要原因.

关键词： 金刚石   冲击试验   破坏形式   筛分法   工具  

摘要： 用筛分法把冲击后的金刚石划分为未破碎、微破碎和完全破碎三种类型 ,不仅可以更好地监控金刚石的质量 ,而且还与金刚石颗粒在工具中的实际破坏形态相对应。通过改变冲击条件 ,利用冲击韧性测定仪模拟了人造金刚石颗粒在实际使用中的受力状况。

关键词： 毒品检验   信息情报   定性分析   定量分析  

摘要： 禁毒离不开情报 ,情报工作是禁毒工作中的重要组成部分 ,对禁毒工作起着信息支持作用 ,对打击毒品犯罪具有举足轻重的作用。毒品检验是刑事科学技术工作的组成部分 ,是揭露和证实毒品犯罪的重要技术手段 ,在禁毒斗争中具有十分重要的情报作用。本文研究介绍几种毒品检验方法和特点 。

关键词： 质量作用域   出口   烟花爆竹检验   法理依据   运输区域   存储区域   销售使用区域  

摘要： 一、引言 烟花爆竹是涉及安全的产品,各国为了加强对其管理纷纷制定有关法律、法规、标准及条例(以下统称为国外技术法规)对其进行严格管理.这对保障烟花爆竹的安全生产、运输、储存、使用起到了积极的作用.但由于各国标准不尽相同,甚至存在某种程序的冲突,给出口烟花爆竹检验工作带来了许多难题.如主要输往美国的小礼花弹类产品,我国标准规定引线时间为8-12秒,而美国标准则规定为3-9秒,如果同时必须满足两国的标准,将此产品的引线时间定在8-9秒间,这在实际上是不可能做到的.

关键词： 法律处理   侵权责任   违约责任   责任竞合   竞合问题   当事人利益   侵权人   探求   现实   解释  

摘要： 合同法和侵权行为法的既相对独立又局部重叠是产生违约责任和侵权责任竞合的根本原因。对责任竞合的法律处理不能纯依概念或逻辑推理 ,应立足于本国立法现实 ,从立法旨意和平衡当事人利益去探求。而今各国对责任竞合法律处理的三种制度 ,都未能根本解决竞合问题 ,竞合问题的最终处理将归结于侵权人最后应承担的责任 ,其应承担的不是一个违约责任或一个侵权责任 ,也不是双重责任 ,而双重责任减去二个责任的重合部分责任。这种规定在我国现行法中没有体现 。

关键词： discriminant partial least square model   back-propagation artificial neural network model   environmental soil sample   MULTILAYER FEEDFORWARD NETWORKS   FATTY-ACID PROFILES   GENETIC ALGORITHMS   WAVELENGTH SELECTION   MICROBIAL COMMUNITIES   PATTERN-RECOGNITION   OPTIMIZATION   REGRESSION   PLS   TUTORIAL  

摘要： Two variable selection methods were evaluated by comparing their predictions with respect to differentiating among environmental soil samples. The focus of this work is to determine which input variables are most relevant for prediction of soil sources using discriminant partial least square (D-PLS) and back-propagation artificial neural network (BP-ANN) models. The methods investigated were stepwise variable selection method and genetic algorithms (GAs). Microbial community DNA was extracted from 48 environmental soil samples derived, from different field crops and soil sources. After amplification of bacterial ribosomal RNA genes by polymerase chain reaction (PCR), the products were separated by gel electrophoresis. Characteristic complex band patterns were obtained, indicating high bacterial diversity. Two hundred and twenty-three, DNA band patterns produced in the gels of the soil samples were used in the analysis, after removal of included DNA standard markers. Based on the brightness of the bands, densitometric curves of the selected DNA band pattern were extracted from the gel images. The curves were smoothed using Savitsky-Golay method band scaled to the DNA standard markers. The prediction results based on the two variable selection methods for PLS and ANN models are presented and compared. Both methods gave good results before any variable selection methods, with the ANN being better than D-PLS. The prediction performance of both methods specially the D-PLS were improved by applying the stepwise variable selection and the GA variable selection method. The study also shows that GA variable selection had a significant improvement of the predictive ability than the stepwise variable selection method. (C) 2001 Elsevier Science B.V. All rights reserved.

关键词： LIQUID-CHROMATOGRAPHY   GANGLIOSIDES   PURIFICATION   MIGRATION   MUCIN  

摘要： Simultaneous analysis of sialic acids has been a challenging target, because sialic acids having N- or O-acetyl, glycolyl, and sulfonic acid ester groups are labile during their release from carbohydrate chains and analytical procedures. In the present paper, we propose a method using high-performance liquid chromatography coupled with eletrospray ionization mass spectrometry (HPLC-ESI-MS). The method was evaluated by applying to the analysis of sialic acids in various tissues, especially digestive organs in mice and rats. The method was based on the in situ precolumn derivatization of sialic acids after releasing them by hydrolysis. The sialic acids were derivatized with 1,2-diamino-4,5-methylenedioxybenzene to form highly fluorescent quinoxaline derivatives. By using two different hydrolysis conditions (i.e., with 2 M acetic acid and with 0. 1 M hydrochloric acid), both total sialic acids and sialic acid distributions were easily determined. We found that sialic acids showed characteristic distributions in the tissues of mice and rats. Further, HPLC-ESI-MS revealed that all the tissues examined in mice and rats commonly contained highly acetylated sialic acids and 8-O-sulfated N-acetylneuraminic acid.

关键词： CONTRACTS (International law)   INTERNATIONAL trade   EXPORT sales contracts   COMMERCIAL law  

摘要： Identifies the battle of the forms problem and the domestic solutions in the United States and Canada. Information on the battle of the forms problem; How to harmonize the contracts for the international sale of goods (CISG) with domestic laws; Discussion on the need for uniform interpretation of the CISG.

关键词： 合同的形式   当事人   书面形式   发生法律效力   订立合同   合同范本   合同的效力   合同书   房地产转让合同   协议书  

摘要： 甲公司因生产需要,急需一批铝锭,于是该厂采购科人员打电话给乙厂,要求乙厂马上送一批铝锭到甲公司。双方在电话中对铝锭的规格、数量和单价达成一致意见。但当乙厂将铝锭送到甲公司时,甲公司却以“双方未签署正式的合同”为由,拒绝接收乙厂送来的铝锭。乙厂诉至法院。法院判决认定双方已通过口头方式订立合同。