Pharmacokinetics of intravenously administered sodium dichloroacetate in rabbits

ＰｈａｒｍａｃｏｋｉｎｅｔｉｃｓｏｆｉｎｔｒａｖｅｎｏｕｓｌｙａｄｍｉｎｉｓｔｅｒｅｄｓｏｄｉｕｍｄｉｃｈｌｏｒｏａｃｅｔａｔｅｉｎｒａｂｂｉｔｓＧｕＢｉｎ（顾斌）；ＳｏｎｇＬｉｎｇ（宋岭）；ＪｉａｎｇＹｏｎｇｐｅｉ（蒋永培）；ＷｅｎＡｉｄｏｎｇ（文...     

Protection of chickens against highly lethal H5N1 and H7N1 avian influenza viruses with a recombinant fowlpox virus co-expressing H5 haemagglutinin and N1 neuraminidase genes

Inactivated whole avian influenza virus (AIV) vaccine provides protection against homologous haemagglutinin (HA) subtype virus, but poor protection against a heterologous HA virus. Moreover, it induces chickens to produce antibodies to cross-reactive antigens, especially nucleoprotein, which is limits AIV serological surveillance. In this study, a recombinant fowlpox virus co-expressing HA (H5 subtype) and NA (N1 subtype) genes of AIV was evaluated for its ability to protect chickens against intramuscular challenge with a lethal dose of highly pathogenic (HP) AIV. Susceptible chickens were also vaccinated by wing-web puncture with the parent fowlpox vaccine virus. Following challenge 4 weeks later with HPAIV, all chickens vaccinated with recombinant virus were protected, while the chickens vaccinated with either the unaltered parent fowlpox vaccine virus or unvaccinated controls experienced 100% mortality following challenge. This protection was accompanied by the high levels of specific antibody to the respective components of the recombinant vaccine. The above results showed that rFPV-HA-NA could be a potential vaccine to replace current inactivated vaccines for preventing AI.     

益气活血汤对老年肺心病心衰患者血液流变学的影响

目的探讨益气活血汤对老年肺心病心衰患者血液流变性的影响。方法将48例肺心病心衰患者随机分为两组,均采用常规西医治疗,治疗组加用益气活血汤;观察两组治疗前后血液流变学指标变化情况。结果治疗组治疗前后比较,各项血液流变学指标改变差异有显著性,对照组治疗前后比较无统计学意义;治疗组各项指标与对照组比较差异有显著性。结论益气活血汤对肺心病心衰有改善血液流变性的作用。     

Postnatal differentiation and development of the rat epididymis: A stereological study

Postnatal development and differentiation of the rat epididymis was studied in the rat from 15 to 120 days of life using stereological techniques. Both the relative volume (volume density) and absolute volume of the epithelial, interstitial, and luminal compartments in the initial segment, caput, corpus, and cauda epididymides were determined. In all segments the volume density of the epithelial compartment increased between days 15 and 30 before falling to adult values at 45 days in the initial segment (0.476 ± 0.031), at 60 days in the caput (0.258 ± 0.028) and at 90 days in the corpus (0.245 ± 0.007) and cauda (0.140 ± 0.004). The relative volume of the interstitium decreased, whilst that of the lumen increased over the same period with adult values being achieved earlier in the proximal segments than in the distal segments. In contrast to volume fraction the absolute volume of all compartments in all segments increased from day 15 to day 90. Between 90 and 120 days the absolute volumes of compartments in the initial segment and caput showed little volume change. All compartments in the corpus and cauda showed significant increases in volume over the same period. A similar pattern of development was observed with respect to the surface area of both the luminal and basement membrane aspects of the epithelium; surface area per unit volume (surface density) in all segments reached adult values at approximately 60 days, whilst the increase in absolute area of the surfaces ceased at 90 days in the initial segment and caput and continued to 120 days in the corpus and cauda. The total length of the epididymal tubule showed the same pattern with no increase in length apparent in the initial segment and caput after 90 days. Length however continued to increase in the corpus and cauda between 90 and 120 days. Tubule and luminal diameter reached their definitive values in the initial segment on day 60 but continued to increase until day 90 in the distal segments. Epithelial height increased between 15 and 30 days in all segments; in the caput, epithelial height was greatest on day 30 before decreasing slightly; and in the corpus and cauda maximal epithelial height was observed on day 45 decreasing to stable values on day 60 and 90, respectively. All the data is consistent with a proximal to distal differentiation and development of the epididymis with growth continuing in all segments after the establishment of the definitive architecture. Growth of the distal segments continued after its cessation in the proximal segments. © 1994 Wiley-Liss, Inc.     

双语教学Powerpoint课件制作探讨

针对Powerpoint软件在课件制作上常存在的屏幕背景与文字色彩对比不当、文字数量太多及字体太小、文字动画太多且乱、声音混杂等问题,结合实践就如何制作课件,尤其是双语教学课件,从总体布局、屏幕文字安排、背景与版式的设计、声音与动画等方面进行了探讨,并介绍了多种特殊效果的应用技巧.     

外周神经动作电位记录中刺激伪迹的消除方法

<正> 记录外周神经动作电位的实验中往往有难以克服的刺激伪迹。特别所记录的外周神经比较短时,此问题更为突出。一般常用的消除刺激伪迹方法亦不易奏效。通过摸索,我们找到一种简单的消除方法。现介绍如下:     

乳腺囊性增生病癌变过程中部分因素变化的意义

检测乳腺囊性增生病（ＦＣＤ）经不典型增生到癌变部分因素的变化。结果提示：从因明显ＦＣＤ症状活检至癌变为２～１０年；从Ⅱ级以上不典型增生到临床癌变需２～７年；癌变率为３．１％。ＦＣＤ患者存在性激素分泌调控失常，血浆雌激素和催乳素含量增加，导致上皮细胞增生。乳腺一般性增生细胞的ＤＮＡ含量和超微结构与正常乳腺上皮细胞相似；无肿瘤相关抗原及异常基因产物表达。而发生在一般性增生基础上的不典型增生则呈现细胞基因物质ＤＮＡ含量增加，部分为超４Ｃ的多倍体细胞；同时出现细胞膜和细胞核超微结构异常；雌激素受体含量增加，对性激素的依赖性和敏感性增强；部分不典型增生细胞出现胚胎性肿瘤相关抗原和异常基因产物表达。随不典型增生程度加重至乳腺癌，上述诸因素的变化趋势具有明显规律性。提示ＦＣＤ上皮细胞从一般性增生经不典型增生至乳腺癌为细胞生物学连续逐渐变化的过程。部分不典型增生细胞中具有癌倾向的细胞生物学行为异常和表型变化与乳腺癌发生密切相关。细胞核ＤＮＡ含量等异常变化及程度可作为乳腺癌前病变发展程度的客观标志     

骨髓腔静脉造影在特发性股骨头坏死诊断中的应用

本文介绍17例（34髋）特发性股骨头坏死、4例（4髋）正常人骨髓腔静脉造影所见。发现25髋有异常改变,并经病理证实。作者认为:①骨干返流;②2支或2支以上静脉不显影;③多条静脉明显变细;④干骺端瘀积是股骨头坏死的造影表现,前二者是可靠的诊断依据。造影结果提示髓腔静脉造影是一种安全而敏感的诊断技术。