The Osmotic Properties of the Eggs of the Trout (Salmo Farjo)

Author:

GRAY J.1

Affiliation:

1. Laboratory of Experimental Zoology, Cambridge.

Abstract

1. The normal healthy eggs of the trout are impermeable both to water and to intracellular electrolytes. The barrier to diffusion of both water and salts lies in the vitelline membrane, whose static properties maintain the normal hypertonicity of the yolk without expenditure of energy. 2. When eggs are exposed to conditions which destroy the normal impermeability of the vitelline membrane, exosmosis occurs suddenly at the end of a latent period, and once it has begun exosmosis is usually rapidly completed. Exosmosis is a sign of an unhealthy cell. 3. The osmotic stability of the vitelline membrane varies with four factors: (a) the age of the eggs, (b) the degree of mechanical disturbance caused by the environment, (c) the presence or absence of calciuim in the environment, (d) the nature and concentration of the exosmotic reagent used. 4. Loss of the impermeable properties of the vitelline membrane is accompanied by a drastic change in the distribution of the material of the membrane and in the organisation of the egg cell.

Publisher

The Company of Biologists

Subject

Insect Science,Molecular Biology,Animal Science and Zoology,Aquatic Science,Physiology,Ecology, Evolution, Behavior and Systematics

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3