ELECTRONIC DISCLOSURE AND FINANCIAL KNOWLEDGE MANAGEMENT

1. Introduction Majority of financial information are disseminated through the Internet, every day, huge amount of financial information are generated but the utilization is not good enough: according to the 10th WWW User Survey by the Graphics, Visualization, and Usability Centre (GVU 1998), more than 45 percent of the respondents felt that they were not able to find the information they needed. A study of the Internet demography showed that searching, retrieving, and utilizing the avail…     

Purification and characterization of myosin from wheat mitochondria

Myosin was purified from wheat mitochondria using DE-52 anion exchange chromatography and Sephacryl S-300 gel filtration. The molecular weight of its heavy chain is about 210 ku, similar to that of muscle myosin Ⅱ(205 ku), and it could be recognized by the polyclonal antibodies against human skeletal muscle myosin Ⅱ. The ATPase activity of the mitochondrial myosin stimulated by F-actin from chicken muscle is 202.5 nmoles Pi/min·mg. The mitochondrial myosin could be activated by Ca²⁺ and was not inhibited by Ca²⁺ at high concentration. The results demonstrate that the myosin of wheat mitochondria shares some similarities with the skeletal muscle myosin Ⅱ.     

专用起重机塔架自振特性的研究

本文应用模态参数识别与试验模态分析技术．对专用起重机塔架系统的自振特性进行了试验研究．同时对其振动横态参数做了理论计算，取得了较为一致的成果．     

可控硅相控触发电路分析与设计

本文介绍了一种新型可控硅相控触发电路的工作原理，其特点是电路简单，集成化程度高，生产调试容易，不仅不需要专门的同步变压器，而且整个触发电路对电源无相序要求，是三相桥式全控整流弧焊电源的理想触发电路。     

含硫、氮席夫碱-3d-金属配合物的研究(Ⅰ)——2,4-二羟基苯甲醛缩氨基硫脲及其铜(Ⅱ)配合物的合成、表征和抗菌活性~*

本文报导了2,4-二羟基苯甲醛缩氨基硫脲与铜(Ⅱ)的配合物的合成方法、红外光谱、紫外光谱、元素分析等特征及抗菌活性。它们都是未见文献报导的新的化合物。     

Neurofibrillary tangles, amyotrophy and progressive motor disturbance in mice expressing mutant (P301L) tau protein

Neurofibrillary tangles (NFT) composed of the microtubule-associated protein tau are prominent in Alzheimer disease (AD), Pick disease, progressive supranuclear palsy (PSP) and corticobasal degeneration (CBD). Mutations in the gene (Mtapt) encoding tau protein cause frontotemporal dementia and parkinsonism linked to chromosome 17 (FTDP-17), thereby proving that tau dysfunction can directly result in neurodegeneration. Expression of human tau containing the most common FTDP-17 mutation (P301L) results in motor and behavioural deficits in transgenic mice, with age- and gene-dose-dependent development of NFT. This phenotype occurred as early as 6.5 months in hemizygous and 4.5 months in homozygous animals. NFT and Pick-body-like neuronal lesions occurred in the amygdala, septal nuclei, pre-optic nuclei, hypothalamus, midbrain, pons, medulla, deep cerebellar nuclei and spinal cord, with tau-immunoreactive pre-tangles in the cortex, hippocampus and basal ganglia. Areas with the most NFT had reactive gliosis. Spinal cord had axonal spheroids, anterior horn cell loss and axonal degeneration in anterior spinal roots. We also saw peripheral neuropathy and skeletal muscle with neurogenic atrophy. Brain and spinal cord contained insoluble tau that co-migrated with insoluble tau from AD and FTDP-17 brains. The phenotype of mice expressing P301L mutant tau mimics features of human tauopathies and provides a model for investigating the pathogenesis of diseases with NFT.     

Effect of internal deletion of Myosin II on growth and development ofDictyostelium discoideum

Four deletion mutantDictyostelium myosin II heavy chain genes, MyΔ824-941 (Δ1/ 3S2), MyΔ934-1454 (ΔS2), MyΔ934-1194 (ΔS2-1) and MyΔ1 157–1454 (ΔS2-2), were transformed by standard electfoporation into mhcA-cells (T-null), a mutantDictyostelium cell devoid of endogenous myosin II heavy chain gene. The growth, development and formation of fruiting bodies of cells expressing those mutant myosin II s under suspension culture were investigated by comparison with the wild type cell. The results indicate that internal deletion of myosin II affeds the growth and development ofDictyastelium. Furthermore, the longer the length of deletion, the more serious the defect in phenotype.     

复合助剂对VPO催化剂物性的影响

以V2O3、浓H3PO4为原料,浓Hcl和柠檬酸作还原剂,加入一定含量不同金属离子作为助剂采用超临界流体干澡法制备了VPO催化剂,并在不同气氛下进行活化．应用BET、XRD、XPS等表征手段,考察了各VPO催化剂粒子的比表面积、晶相结构及表面V离子价态等物性．实验表明：采用超临界流体干燥法可使催化剂的比表面积显著增加,助剂的种类和量不同,活化气氛不同,对催化剂比表面积的影响也不同,助剂的种类对催化剂的晶相结构也有一定的影响．但对催化剂表面V离子价态影响不大．     

夫妻分别财产制与债务处理探析

夫妻分别财产制是适应社会发展趋势的新型夫妻财产关系。在市场经济条件下，完善夫妻分别财产制、规范债务处理，使经济生活秩序化，使婚姻质量得到提高，这对维护夫妻双方及第三人的合法权益，都有十分重要的现实意义。