薄层色谱法测定戊二酰基-7-氨基头孢烷酸酰化酶的活力

用薄板层析分离ＧＬ＿７＿ＡＣＡ酰化酶反应的产物和底物,然后用薄层扫描仪进行扫描定量,经过与ＧＬ＿７＿ＡＣＡ和７＿ＡＣＡ标准品的薄层扫描相比较,得出酶反应液中的７＿ＡＣＡ浓度,从而计算出ＧＬ＿７＿ＡＣＡ酰化酶的活力     

Stimulation of glucagon and inhibition of insulin secretion evoked from carotid baroreceptors.

The influence from carotid baroreceptors on portal immuno-reactive glucagon and insulin levels and on arterial plasma glucose concentration was studied in vagotomized cats by sectioning of the sinus nerves. Such a complete elimination of the afferent baroreceptor discharge caused a prompt and pronounced increase in the glucose and glucagon levels, whereas the insulin concentration significantly decreased. The role of vascular barorecptors in the hyperglycemic response to hemorrhage is discussed.     

Genetic control by the HLA region of the immune response to factor VIII in hemophilic patients]

In 10 sibships of haemophilic A patients, every one including 1 haemophilic brother with an antibody to factor VIII and 1 haemophilic brother without antibody, pattern of HLA segregation was analysed. All sibships were HLA haploidentical or different and not HLA identical. This fact suggested a linkage between the major histocompatibility complex and an "Ir" gene to factor VIII.     

Effect of insulin on immunological phagocytosis by macrophages.

It was shown that, in physiological concentrations, insulin enhances, in vitro, the immunological phagocytosis of sensitized sheep erythrocytes by cultured mouse peritoneal macrophages. Insulin seems to stimulate macrophage phagocytosis as a cholinomimetic agonist by increasing the intracellular levels of cyclic GMP.     

Pyrogen fever in rabbits pretreated with p-chlorophenylalanine or 5, 6-dihydroxytryptamine.

The hyperthermic effect of a bacterial pyrogen has been studied in rabbits pretreated or not with p-chlorophenylalanine or 5, 6-dihydroxytryptamine. The results obtained indicate that a selective reduction of cerebral 5-hydroxytryptamine levels by these drugs do not significantly affect pyrogen hypertermia.     

浅析市场经济条件下的政府行为

政府从产生之日起,改革的实践就从未停止过。在现今市场经济条件下,更需要因时制宜地就政府行为作调整。本文试图就中国在经济发展过程中,政府行为的特征、作用、范围及其方式的演进做一浅析,明确我们在社会主义市场经济条件下怎样更好地进行政府运作。     

改变不可持续生产模式的技术方案

面对不断恶化的生态环境，以及日趋枯竭的资源、能源，必须改变不可持续的生产模式.本文基于产业生态学的基本原理，针对我国的环境、资源状况，提出了改变不可持续生产模式的技术方案。     

添加剂在脉冲放电烟气脱氮过程中的作用

脱硝反应器由针电极和线电极组成,针电极采用不锈钢细管制成,添加剂从针电极喷出;当针电极接脉冲高压电源电晕放电时,添加剂生成自由基,用以脱除烟气中的氮氧化物.实验结果表明:当氨气和丙烯同时加入时,氮氧化物的去除率随着丙烯加入量及能量密度的增加而增加;在能量密度为2 W·h/m3,氮氧化物的初始体积分数约为80×10-6时,NO的脱除效率达到76%,NOx的脱除率达到54%.