Inert gas narcosis, the high pressure neurological syndrome, and the critical volume hypothesis

The hypothesis that general anesthesia or pressure-induced convulsions occur when a hydrophobic region is expanded or compressed, respectively, by critical amounts is consistent with recent data obtained with mice. Calculations show that anesthesia occurs at an expansion of 1.1 percent and convulsions at a compression of 0.85 percent, the latter site of action being more compressible.     

Pleistocene avifaunas and the overkill hypothesis

At the end of the North American Pleistocene, birds and mammals suffered comparable degrees of generic extinction. Both the magnitude and pattern of avian extinction are incompatible with the hypothesis that humans played a major role in causing the demise of numerous North American mammalian genera at this time.     

鸡蛋蛋白过敏综述

鸡蛋过敏是一种复杂的无序状态,许多鸡蛋蛋白均可引起过敏。鸡蛋蛋白过敏受多种免疫机制驱动,过敏发生率和占主导地位的过敏机制随年龄改变而改变。鸡蛋过敏一般为免疫球蛋白E(IgE)介导型过敏反应,鸡蛋蛋白中主要的过敏原为卵白蛋白、卵类黏蛋白、卵转铁蛋白、溶菌酶。鸡蛋过敏真实患者或疑似患者及早避食蛋制品和及时给予喂养指导十分重要。通过对过敏的诱发和免疫机理的了解探讨了导致鸡蛋过敏反应的过敏原特征和检测手段,并对过敏反应的预防策略进行分析。     

Mechanism of transmitter release: voltage hypothesis and calcium hypothesis

The calcium hypothesis of synaptic transmission has been challenged by experimental results using the crayfish neuromuscular junction that suggest that presynaptic depolarization can trigger transmitter release directly without calcium influx. Results from electrophysiological experiments using the same preparation do not support this voltage hypothesis, but are consistent with the calcium hypothesis. Voltage may modulate, but not elicit, transmitter release.     

牛乳乳清蛋白过敏性研究进展

乳清蛋白是引起牛乳过敏的主要成分,其中,β-乳球蛋白(β-Lg)和α-乳白蛋白(α-La)是最主要的过敏原。通过蛋白质改性的方法,可以控制和消除乳清蛋白的过敏性。综述了β-Lg和α-La引起过敏的主要结构片段,并介绍了常用的降低乳清蛋白过敏性的改性方法。     

松树枯萎病枝条内的寄生虫和微生物群落

对松树枯萎病枝条内的寄生虫和微生物群落进行分离研究,结果发现枯萎松枝条内有大量的寄生虫和微生物,主要是线虫、原虫、真菌和细菌。经形态观察,线虫为松材线虫（Bursaphelenchus xylophilus （Steiner and Btihrer）Nikle）、拟松材线虫（B．mucronatus Mamiya and Enda）和小杆线虫（Rhabditida sp．）;原虫为一种纤毛虫（Paramoecium sp．）;真菌是长喙壳孢（Ceratocystis Ell．et Hals）;细菌主要是假单胞杆菌（Pseudomanus sp．）和芽孢杆菌（Bacillus sp．）。     

Controlling and coordinating development in vector-transmitted parasites

Vector-borne parasites cause major human diseases of the developing world, including malaria, human African trypanosomiasis, Chagas disease, leishmaniasis, filariasis, and schistosomiasis. Although the life cycles of these parasites were defined over 100 years ago, the strategies they use to optimize their successful transmission are only now being understood in molecular terms. Parasites are now known to monitor their environment in both their host and vector and in response to other parasites. This allows them to adapt their developmental cycles and to counteract any unfavorable conditions they encounter. Here, I review the interactions that parasites engage in with their hosts and vectors to maximize their survival and spread.     

水产养殖动物寄生虫及环境的相互关系

随着水产养殖集约化程度地不断提高,鱼类传染性疾病暴发所带来的损失愈发严重,鱼类病害已成为制约水产养殖业健康发展的关键问题,其中寄生虫病发生较为频繁,同时由于原发寄生虫所造成继发感染其它的疾病也给水产养殖业造成了损失.当前,传统的化学药物防治鱼类疾病带来了病原体抗药性增加和药物残留等新问题,这与今天我们所倡导的绿色养殖、生态养殖的观点是不相适宜的,所以我们只有了解和掌握水产养殖动物、寄生虫及环境的相互关系,才能从根本上提出有效的防治方法.本文从寄生虫对寄主造成的损伤方式、寄主对寄生虫的作用、寄生虫与各种环境因子的关系等方面进行论述,以期能对水产养殖中的寄生虫防治有指导作用.     

会计假设的图解研究与探索

会计假设在财务会计理论与实务研究中占有重要地位,它是理解和掌握会计基本理论与核算方法的基础。由于会计假设比较抽象,而且由会计假设引出的基本理论较为复杂,如何直观、清晰地讲解会计假设,以便更好地理解和掌握会计的基本理论?本文根据在教学实践中设计的会计假设图解,介绍了会计理论框架中的会计假设、发出存货计价中的会计假设和固定资产折旧中的会计假设以及图解的应用。     

Evidence for the neutral hypothesis of protein polymorphism

Data for some 400 polymorphic proteins were examined with special reference to molecular evolution, by using a statistic that depends on neither mutation rate, population structure, nor other ecological factors. The result indicates that most of these polymorphisms are maintained in a population by mutation and random genetic drift.     

肉用美利奴羔羊肺炎链球菌感染的诊断与防治

对一起进口美利奴胚胎羔羊发生的以脑炎、关节炎、肺炎为特征的链球菌感染 ,进行了诊断 ,并采取措施 ,有效控制了病情。     

利福昔明乳房注入剂的局部刺激性与过敏性试验研究

为了科学、客观地评价干乳期利福昔明乳房注入剂在奶牛临床上应用的安全性,根据相关技术指导原则,分别进行家兔的皮肤刺激性试验、阴道刺激性试验及豚鼠主动皮肤过敏性试验,试验结果显示,利福昔明乳房注入剂给药部位的皮肤和生理盐水对照组都没有出现红斑和水肿,刺激强度的评分为0分;阴道刺激试验的试验组和对照组的阴道粘膜没有出现明显的白细胞浸润、充血和水肿现象,阴道粘膜刺激指数为0.25;在皮肤过敏性试验中,给药组动物皮肤未见红斑与水肿,各时间的皮肤刺激反应积分为0。因此,利福昔明乳房注入剂对家兔的皮肤和阴道无刺激性;对豚鼠不产生明显的皮肤过敏性反应。