scholarly journals Supplementary material to "Short Communication: Aging of basalt volcanic systems and decreasing CO<sub>2</sub> consumption by weathering"

2018 ◽  
Author(s):  
Janine Börker ◽  
Jens Hartmann ◽  
Gibran Romero-Mujalli ◽  
Gaojun Li
Keyword(s):  
Short Communication ◽  
Supplementary Material

Ultrastructure of primary spermatocyte in fish (Tilapia: Oreochromis niloticus): The synaptonemal complex

1986 ◽  
Vol 44 ◽  
pp. 288-289
Author(s):  
T. Guha ◽  
A. Q. Siddiqui ◽  
P. F. Prentis
Keyword(s):  
Fine Structure ◽  
Electron Microscope ◽  
Synaptonemal Complex ◽  
Oreochromis Niloticus ◽  
Short Communication ◽  
Primary Spermatocyte ◽  
Mitotic Division ◽  
Meiotic Cell ◽  
Electron Microscope Level ◽  
Homologous Chromosomes

The Primary Spermatocytes represent a stage in spermatogenesis when the first meiotic cell division occurs. They are derived from Spermatogonium or Stem cell through mitotic division. At the zygotene phase of meiotic prophase the Synaptonemal complex appears in these cells in the space between the paired homologous chromosomes. Spermatogenesis and sperm structure in fish have been studied at the electron microscope level in a few species? However, no work has yet been reported on ultrastructure of tilapia, O. niloticus, spermatozoa and spermatogenetic process. In this short communication we are reporting the Ultrastructure of Primary Spermatocytes in tilapia, O. niloticus, and the fine structure of synaptonemal complexes seen in the spermatocyte nuclei.

SHORT COMMUNICATION

1997 ◽  
Vol 61 (3) ◽  
pp. 275-279 ◽  
Author(s):  
S. MONNO ◽  
Y. MIZUSHIMA ◽  
N. TOYODA ◽  
T. KASHII ◽  
M. KOBAYASHI
Keyword(s):  
Short Communication
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