one of a group of cells that develop in the walls of the seminiferous tubules. Spermatogenic cells include spermatogonia, spermatocytes, and spermatidsâall of which are transitional forms between primary sexual cells and spermatozoa.
long-haul optics. Long-haul optics refers to the transmission of visible light signals over optical fiber cable for great distances, especially without or with minimal use of repeaters. Normally, repeaters are necessary at intervals in a length of fiber optic cable to keep the signal quality from deteriorating to the point of non-usability. In long-haul optical systems, the goal is to minimize the number of repeaters per unit distance, and ideally, to render repeaters unnecessary.
This first family is when the fibre is longer than 33mm and has a fibre diameter of 4.3 to 4.9. It is very high quality cotton, which is slightly better than the well-known American brand of âSupimaâ cotton. Extra-long staple fibres - The second group includes: Giza 87, Giza 88, Giza 45. To be graded as one of these 3 premium Giza qualities the fibres must be fine yarn diameter with high uniformity index.