人绒毛膜促性腺激素β-亚基基因疫苗在动物肌肉组织中的表达

为观察pCMV4—hCGβ重组质粒经肌肉途径接种后在宿主体内的表达，本实验以昆明小白鼠为实验材料，将实验组鼠经后腿股四头肌注射重组质粒pCMV4—hCGβ100μg，对照组注射pCMV4 100μg，于接种后第7d和第30d取小鼠股四头肌免疫组化染色。结果显示 在注射部位肌肉的肌膜和肌间隙处见到棕褐色分泌颗粒，对照组则未见阳性颗粒，本研究探索了hCGβ基因导人小鼠骨骼肌并在肌肉组织内进行表达的情况，为hCGβ基因疫苗的研制提供了体内表达的依据。     

High-contrast imaging for weakly diffracting specimens in coherent diffraction imaging

Coherent diffraction imaging (CDI) and ptychography techniques bypass the difficulty of having high-quality optics in X-ray microscopy by using a numerical reconstruction of the image that is obtained by inverting the diffracted intensity recorded by a charge-coupled device array. However, the reconstruction of the image from the intensity data obtained from a weakly diffracting specimen is known to be difficult because of the obvious reduction in signal-to-noise ratio (SNR). In this case, the specimen only slightly modifies the probe diffraction pattern, resulting in difficulty in the identification of the detailed structure of the specimen from the reconstructed image because of the poor contrast and sharpness of the image. To address this situation, a modification in the image retrieval algorithms used in the iterative reconstruction of the image is suggested. This modification should double the presence of high spatial frequencies in the diffraction pattern to enhance the contrast and edge detection in existing imaging techniques.     

沼螨属一新种描述（蜱螨亚纲：绍螨科）

描述了采自江西的沼螨属1新种：三裂沼螨Limnesia(Limnesia)trifurcata,新种的模式标本保存于南昌大学生物科学工程系。     

江西菱属二新变种

<正> 南昌格菱新变种 Trapa pseudoincisa Nakai var. nanchangensis W. H. Wan, var. nov. A varictac pscudoincisa differt flore et fructu axillisfoliis pinnatisectis submersis et foliis fluitantibus affixis; fructibus rhombideltoideis. 2 cornibus pa-     

南昌地区药用苔藓植物调查

<正> 苔藓植物种类多,分布广,是地被的主要成分和丰富的层外植物。南昌地区地形复杂多样,水热条件充沛,适于苔藓植物的生长繁育。自1983年起,我们先后赴市内、郊区、望城、梅岭、西山等地调查、研究,采集苔藓植物标本400余号,常见的药用种类如下:     

分析仪器标本实物学习平台构建及教学实践探索——以分光光度计为例

针对本科生在分析仪器学习中存在的困难,探索构建分析仪器实物学习平台,将抽象的仪器原理和功能学习实物化、具体化;以学习者为主体制作仪器标本和多媒体自学课件,激活了学生自身的学习、创新能力;经过4年的教学实践,说明新模式提高了学习效率和教学效果。     

Experimental study on electrical resistivity measurement of a specimen at high temperature

A new technique is developed to measure the electrical resistivity of conductor with a nonuniform tem- perature profile. The calculation method is derived from the temperature dependence of the electrical resistivity. The apparatus consists mainly of a high temperature environmental chamber, a power circuit of heating, a twenty-wavelength pyrometer, and a scanning pyrometer. After getting the resistance from the voltage drop of the specimen, the electrical resistivity in a wide temperature range of the specimen can be obtained by our calculation model. Preliminary results of the electrical resistivity of SRM 8424 over a wide temperature range （1000-3000 K） are presented. The perfect consistency between the measurement results and the nominal values justifies the validity of this technique.     

格里利（Greely，Adolphus Washington 1844-1935）美国探险家（Explorer，America）

第一次国际极地年期间（1882-1883），在由11个国家资助的联合科学研究计划中，指挥部设在埃尔斯米尔岛东北部康格尔堡的美国观测站。从1881年8月至1883年8月，由格里利等25名官兵组成的探险队记下了500个每天天气和潮汐的观测记录，并且收集和研究了矿物、动物和植物标本。他们乘雪橇考察时发现了迪斯卡弗里西岸的黑曾湖和格里利峡江。     

江西钝绥螨属二新种(蜱螨目:植绥螨科)

<正> 钝绥螨是重要的捕食性天敌,近年来已引起国内外生物防治工作者的注意。本文报导江西采集的钝绥螨属二新种。模式标本保存于江西大学生物系。     

我国西北地区植绥螨三新种记述(蜱螨目:植绥螨科)

<正> 1978年6—8月间作者在青海、甘肃、陕西等西北高原地区采集到一批植绥螨标本,经整理鉴定发现三新种。分隶属于植绥螨科的纯缓螨属和盲走螨属。模式标本保存于江西大学生物系。