The effect of B-pyracin and the Lactobacillus casei factor upon hemoglobin regeneration following hemorrhage

In severe experimental hemorrhagic anemia in hens, the injection of beta-pyracin and Lactobacillus casei factor, alone and in combination, was found to hasten the regeneration of hemoglobin. When these factors were administered together, however, the rise in hemoglobin was much more rapid and the level reached was higher than in the lots administered the factors alone. The hemoglobin levels in the control lots rose above the "pre-bleeding" values and then began an almost immediate decline to approximately the original level. In the lots receiving beta-pyracin and Lactobacillus casei factor, alone or in combination, the hemoglobin levels also rose above the "pre-bleeding" values but were maintained for some time after injections were discontinued before declining to the original values.     

Thalidomide: effect upon pregnancy in the rhesus monkey

Thalidomide was administered to 44 female rhesus monkeys immediately after they had mated. There were no live births from these animals, whereas there were 11 live births in 57 untreated monkeys. The results are statistically significant. The hypothesis is advanced that thalidomide killed the embryo prior to implantation.     

The effect of GTPase activating protein upon ras is inhibited by mitogenically responsive lipids

Bacterially synthesized c-Ha-ras protein (Ras) was incubated with guanosine triphosphatase (GTPase) activating (GA) protein in the presence of various phospholipids. The stimulation of Ras GTPase activity by GA protein was inhibited in some cases. Among the lipids most active in blocking GA protein activity were lipids that show altered metabolism during mitogenic stimulation. These included phosphatidic acid (containing arachidonic acid), phosphatidylinositol phosphates, and arachidonic acid. Other lipids, including phosphatidic acid with long, saturated side chains, diacylglycerols, and many other common phospholipids, were unable to alter GA protein activity. The interaction of lipids with GA protein might be important in the regulation of Ras activity during mitogenic stimulation.     

溴氰虫酰胺对红火蚁工蚁的毒杀活性及行为影响

为了研究溴氰虫酰胺对红火蚁工蚁的致死作用及活动能力的影响,采用水试管法测定溴氰虫酰胺对红火蚁工蚁的毒杀活性和行为影响。结果表明,1mg/L和5mg/L溴氰虫酰胺处理12h后,工蚁校正死亡率分别为34.74%和62.82%,高于0mg/L对照(16.67%)。0mg/L(对照)、1mg/L和5mg/L处理12h后,工蚁校正攀附率分别为80.00%、68.05%和30.43%,校正抓附率分别为80.00%、58.45%和30.38%,校正行走率分别为91.67%、70.97%和0,行走速率分别为2.07、1.07cm/s和0,校正聚集率分别为92.86%、86.35%和39.40%。溴氰虫酰胺对红火蚁工蚁具有较好的毒杀活性,可显著抑制工蚁的行为活动能力,在红火蚁防控中具有广阔的应用前景。     

4种水生植物对污染水体净化效果的研究

采用生态浮床技术对污染水体净化效果进行了研究.结果表明,鸢尾、旱伞草、莼菜、红掌对水体的氮、磷均有良好的去除效果,对总氮的去除能力从大到小依次为红掌、旱伞草、鸢尾、莼菜,对总磷的去除能力从大到小依次为鸢尾、旱伞草、红掌、莼菜.进一步对不同植物搭配组合进行试验,发现对水体TN去除效果最好的组合是旱伞草+鸢尾,去除率为58.24％,对TP去除最好的组合是旱伞草+红掌,去除率为62.08％.     

Disruption of the yeast N-myristoyl transferase gene causes recessive lethality

The structural gene for N-myristoyl transferase (NMT1) has been cloned from the budding yeast Saccharomyces cerevisiae. The gene encodes a polypeptide of 455 amino acids (Mr = 52,837) that has no identifiable significant primary sequence homology with any protein in currently available databases. Overexpression of NMT activity was achieved by means of the yeast episomal plasmid YEp24 without obvious effects on growth kinetics, cell morphology, or acylprotein metabolic labeling patterns. Insertional mutagenesis of the NMT1 locus on yeast chromosome XII caused recessive lethality, indicating that this protein acyltransferase activity is necessary for vegetative cell growth.     

抗逆锻炼与植物的抗逆性

对植物在逆境下的生理反应进行了论述,提出了适度逆境胁迫能够提高植物的抗逆性。依据植物在逆境下的生理基础,把抗逆锻炼应用到生产实践上,取得了一定的效果。并提出了在植物抗逆锻炼研究中存在的问题及今后的研究方向。     

网络传播对大学育人环境的影响

本讨论了网络传播给校园育人环境带来的变化，以及这种变化对大学生的学习、生活、心理、人格特征等方面造成的影响，对目前较普遍存在的夸大网络负面影响的倾向作了具体分析，并就如何建设高校网络育人环境提出了对策。     

过剩空气系数对原油加热炉热效率的影响

通过实际测试和理论分析过剩空气系数与排烟热损失、气体不完全燃烧热损失及加热炉热效率的关系,讨论了过剩空气系数对原油加热炉热效率的影响,给出了过剩空气系数的最佳范围。结合实践生产,介绍了加热炉送风自控系统的特点及应用价值。     

抚育间伐对人工林红松木材材质的影响

对间伐与未间伐人工林红松（Pinus koraisensis)木材材质进行系统测定、统计分析，结果表明：间伐对木材材质有很大的影响，间伐林的管胞长度、管胞直径、纤丝角、生长速率、生长轮宽度、顺纹抗压和抗拉强度、抗劈力和冲击韧性大于未间伐林；间伐林木材晚材率、生长轮密度、壁厚、壁腔比、抗弯强度和局部抗压强度小于未间伐林。其中管胞直径、生长轮宽度、壁厚、壁腔比、抗变强度、顺纹抗压和抗拉强度、横纹局部抗压强度的差异达到显著水平，表明间伐能显著地提高木材力学性能。采用综合坐标法，对间伐与未间伐人工林红松木材材质进行评定，其材质的综合性能和纸浆材性能未间伐林好于间伐林，建筑材料性能间伐林好于未间伐林。     

制造技术对CAD技术的影响

我国作为最大的发展中国家,在新一轮国际产业结构调整中,正逐渐成为世界重要的制造业基地.制造业是全面建设小康社会的第一位支柱产业,是国家高技术产业的基础和国家安全的重要保障,而先进制造技术AMT(Advanced Manufacturing Technology)是保障制造业高水平持续快速发展的基础.     

全光雾插自动喷雾装置的改进

本文根据“全光雾插自动喷雾装置”使用中存在的问题,分析了原因,提出改进意见,并通过实验加以验证。     

包申格效应对X65管道钢管强度的影响

进口X65卷板制管后屈服强度明显下降，通过包申格效应试验，分析制管过程中的应力，应变对钢管屈服强度的影响，对进口卷板制管前后屈服强度的变化情况进行了详细研究，指出了影响钢管强度的几个主要因素。     

含水量对黄土结构强度影响的定量分析

分析了黄土强度的特点和各种影响因素，并以杨陵地区渭河北台原黄土为例，对影响黄土强度的主要因素，即黄土的结构强度和含水量对强度的影响进行了试验研究，探讨了不同生成时代风成黄土的结构强度与含水量的关系，建立了黄土结构强度随含水量变化的回归关系。