南瓜籽和西瓜籽中的脂肪酸和油

近年来,人们逐步对食品加工中的副产品和废料利用重视起来,对目前尚未被利用起来的某些农副产品也产生了极大的兴趣。这显然是件好事,因为这样可以最大限度地利用现有的资源,可以为食品和饲料增加更多的品种,还可以减少食品工业对环境的污染,解决了废料的处理问题。     

有孔虫和放射虫的采集和保存

采集对于有孔虫的采集,可以借助于放大镜的帮助,直接从珊瑚藻等藻类上采集。也可将一个下面紧缚着一块细筛绢的筛,浸在海水里,里面放上几撮海藻并加以摇荡。这样,透过筛底的有孔虫就可以被下面的筛绢所收集。还可以把从海底捞上来的泥沙,倒入盛有海水的容器中,加以搅拌,活的有孔虫即可沉到水底。倒掉上部的水和微粒,即可收集。浮游的种类,可用拖网采集。     

糖类和蛋白质相互作用的应用和展望

既然糖和蛋白质相互作用与许多生理和病理过程有关,那么糖和蛋白质相互作用的研究也就有其广泛的应用价值。 (一)免疫毒素和“生物导弹”目前用于肿瘤治疗的免疫毒素被通俗地别称为“生物导弹”,很是引人注目。原因是免疫毒素以对肿瘤细胞表面特征抗原专一的单克隆抗体作为“导向”分子,使与之相连的作为“弹头”的毒素富集到肿瘤细胞内,从而既能提高疗效又能降低毒素对正常细胞的伤害。就“生物导弹”这一词而言,凡是能把某种分子或组份定向地送到特定的靶细胞或靶器官,     

单克隆抗体和功能细胞株的进展和应用

本书为专论单克隆抗体杂交瘤专著:这还是生物分析研究领域中开辟的新的领域。该书重点介绍了重组单克隆抗体和分子遗传分析技术,阐述了在分子水平上研究基因和基因产物的结构与功能的相互关系,并进一步介绍了单克隆抗体在医学领域中应用的潜力。本书可供遗传学、免疫学、生物工程学、医学、分子生物学等科研和教学人员参考。     

观察导管和管胞的材料和方法

在实驗课中通常感到困难的是材料問題,其次是因受地区季节限制,往往在介紹的經驗中不适于其他地区。因之会严重的影响教学的进行,甚至会引起部分学生对課堂传授的知識发生怀疑。为了避免这种傾向;切合实际选择材料作好实驗,是非常重要的。茲将在做实驗中所获得的結果介紹如下: 一、观察导管的材料和方法课本上和在我們工作中对导管实驗,往往限于用     

药理学科研和培养人才的经验和体会

吕富华教授自三十年代至今从事药理学教学和科研,工作五十年,积累了非常丰富的经验。他的与困难做斗争和严谨的治学精神,值得人们很好地学习。特约本文简略介绍他几十年来的研究成果,从中可以看出其严谨的理论概念和实验方法,以及培养干部和研究生的态度,给我们很多启发。     

当代磁性材料和磁学的研究和应用

本文论述了当代磁性材料和磁学的若干新的研究和应用 ,主要包含 :①高频磁性材料与磁谱学 ;②微波磁性材料与磁共振 ;③纳米磁性材料与介观磁学 ;④磁的普遍存在与交叉磁学     

猪和牛轮状病毒的分离和鉴定

我国对动物轮状病毒的研究报道尚少。用细胞培养法分离轮状病毒又比较困难。本文报道用非洲罗猴胎肾细胞MA-104,结合胰酶处理及旋转培养技术,从北京地区腹泻仔猪和犊牛的粪便中成功地分离到6株猪轮状病毒(暂名为PRV1,PRV2,PRV8,PRY11,PRV15和PRV17)和4株牛轮状病毒(暂名为BRV6555,BRV6551,BRV6571和BRV6576)及其初步鉴定结果。     

Investigation of the mechanism of temperature sensitivity of the electroreceptors of ampullae of lorenzini

In experiments on Black Sea skates (Raja clavata), the potential of the receptor epithelium of the ampullae of Lorenzini and spike activity of single nerve fibers connected to them were investigated during electrical and temperature stimulation. Usually the potential within the canal was between 0 and –2 mV, and the input resistance of the ampulla 250–400 k. Heating of the region of the receptor epithelium was accompanied by a negative wave of potential, an increase in input resistance, and inhibition of spike activity. With worsening of the animal's condition the transepithelial potential became positive (up to +10 mV) but the input resistance of the ampulla during stimulation with a positive current was nonlinear in some cases: a regenerative spike of positive polarity appeared in the channel. During heating, the spike response was sometimes reversed in sign. It is suggested that fluctuations of the transepithelial potential and spike responses to temperature stimulation reflect changes in the potential difference on the basal membrane of the receptor cells, which is described by a relationship of the Nernst's or Goldman's equation type.I. P. Pavlov Institute of Physiology, Academy of Sciences of the USSR, Leningrad. I. M. Sechenov, Institute of Evolutionary Physiology and Biochemistry, Academy of Sciences of the USSR, Leningrad. Pacific Institute of Oceanology, Far Eastern Scientific Center, Academy of Sciences of the USSR, Vladivostok. Translated from Neirofiziologiya, Vol. 12, No. 1, pp. 67–74, January–February, 1980.     

Principles of organization and evolution of systems of regulation of functions

Evolution of living organisms is closely connected with evolution of structure of the system of regulations and its mechanisms. The functional ground of regulations is chemical signalization. As early as in unicellular organisms there is a set of signal mechanisms providing their life activity and orientation in space and time. Subsequent evolution of ways of chemical signalization followed the way of development of delivery pathways of chemical signal and development of mechanisms of its regulation. The mechanism of chemical regulation of the signal interaction is discussed by the example of the specialized system of transduction of signal from neuron to neuron, of effect of hormone on the epithelial cell and modulation of this effect. These mechanisms are considered as the most important ways of the fine and precise adaptation of chemical signalization underlying functioning of physiological systems and organs of the living organism