کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2175710 1093850 2006 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
In the beginning… Animal fertilization and sea urchin development
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی بیولوژی سلول
پیش نمایش صفحه اول مقاله
In the beginning… Animal fertilization and sea urchin development
چکیده انگلیسی

What I most wished to discover [in my study] was the role that spermatozoids play in fertilization. In order to determine this, I put a droplet of red liquid, and at a small distance, a similar droplet of white liquid in a little trough on the viewing slide of the microscope; then, after covering all of this with a thin strip of glass, I added a drop of sea water. I was then able to watch the spermatozoids advance progressively towards the eggs. Some of [the eggs] were soon encircled by a compact mass of moving corpuscles; others, farther away, only found themselves in contact with a very small number [of sperm]; in both cases, I saw the signs of fertilization.The first apparent effect of this union is the almost immediate appearance of a perfectly transparent envelope that encircles the yolk at a certain distance, which is manifested by the appearance of a circular line. I saw this envelope manifest when in contact with a very small number of spermatozoids (three or four, sometimes even one only).

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Developmental Biology - Volume 300, Issue 1, 1 December 2006, Pages 15–26
نویسندگان
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