Heterogeneity of human serum high-density lipoprotein (HDL 2 )

A technique is described for the detection of free fatty acids, triglycerides, wax esters and cholesterol esters on thin-layer Chromatographic plates. The fatty acids present in each fraction can be recovered from the plates after detection and quantitatively measured by gas-liquid chiomatography. This procedure has been sucessfully applied to the analysis of skin surface lipids.     

基于SSL的远程医疗系统安全性设计与实现

随着多媒体及计算机网络技术的高速发展,基于Internet的远程医疗系统面临着严重的网络安全问题。目前,国外著名的商用浏览器和Web服务器都内嵌支持SSL（Secure Socket Layer,安全套接字层）协议,但其核心密码算法都有出口限制,并且协议源代码不公开,根本无法满足我国远程医疗网实际应用的安全需求。本文着重分析了SSL握手协议及SSL协议各部分的安全性和抗攻击能力,详细介绍了一个基于JAVA的SSL安全远程医疗系统的设计方案、技术特点与实现方法,测试结果能够满足需要。     

Diminutive Polyps With Advanced Histologic Features Do Not Increase Risk for Metachronous Advanced Colon Neoplasia

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A Cost-Effective Web-Based Teaching File System

Teaching files are common in radiology. Although there is an increasing role of digital technology in radiology departments, todays teaching files have not yet seen the application of this new technology. This may have been due in part to poor or incomplete implementation in many commercial software packages. We have demonstrated that by utilizing free software from the Internet, a web-based teaching file system, which is easy to use, low cost, and secure, can be created.     

中医药项目绩效管理信息系统设计与实现

介绍中医药项目绩效管理信息系统建改目标,阐述基于安全套接层虚拟专用网通道和电子签章技术的系统架构、功能实现、安全设计及其应用,指出该系统有利于促进中医药项目绩效评价管理信息化建设。     

Complex and rate-dependent beat-to-beat variations in Ca transients of canine Purkinje cells

Purkinje fibers play an essential role in transmitting electrical impulses through the heart, but they may also serve as triggers for arrhythmias linked to defective intracellular calcium (Ca²⁺) regulation. Although prior studies have extensively characterized spontaneous Ca²⁺ release in nondriven Purkinje cells, little attention has been paid to rate-dependent changes in Ca²⁺ transients. Therefore we explored the behaviors of Ca²⁺ transients at pacing rates ranging from 0.125 to 3 Hz in single canine Purkinje cells loaded with fluo3 and imaged with a confocal microscope. The experiments uncovered the following novel aspects of Ca²⁺ regulation in Purkinje cells: 1) the cells exhibit a negative Ca²⁺-frequency relationship (at 2.5 Hz, Ca²⁺ transient amplitude was 66 ± 6% smaller than that at 0.125 Hz); 2) sarcoplasmic reticulum (SR) Ca²⁺ release occurs as a propagating wave at very low rates but is localized near the cell membrane at higher rates; 3) SR Ca²⁺ load declines modestly (10 ± 5%) with an increase in pacing rate from 0.125 Hz to 2.5 Hz; 4) Ca²⁺ transients show considerable beat-to-beat variability, with greater variability occurring at higher pacing rates. Analysis of beat-to-beat variability suggests that it can be accounted for by stochastic triggering of local Ca²⁺ release events. Consistent with this hypothesis, an increase in triggering probability caused a decrease in the relative variability. These results offer new insight into how Ca²⁺ release is normally regulated in Purkinje cells and provide clues regarding how disruptions in this regulation may lead to deleterious consequences such as arrhythmias.     

电子病历的安全管理策略探析

目的：探索电子病历安全管理的方法与途径。方法：利用PKI技术提供的信息安全服务功能,解决电子病历安全管理中所遇到的一系列问题。结果：该安全策略可以达到增强电子病历安全管理的目的。结论：能有效地满足电子病历身份鉴别、机密性、完整性及反拒认等各项需求。