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*停權中*
加入日期: Mar 2008
文章: 23
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請問如何養精子 ???
請問精子養在水缸裏,
1. 需要餵食什麼? 2. 可以養到多大? 3. 養多久後可以交配? 此文章於 2010-01-28 10:33 PM 被 仙水 忍 編輯. |
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2010-01-28, 10:26 PM
#1
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Power Member
 
加入日期: Jan 2002 您的住址: chum bucket
文章: 560
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去找幾個汁男射在針筒裡
針筒注滿之後 拿起來往你的懶蛋插下去打進去就對了
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2010-01-28, 11:18 PM
#2
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*停權中*
加入日期: Dec 2006 您的住址: 嗯..喔..耶..舒服
文章: 150
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快點弄....
集滿兩個寶特瓶 你就知道結論了  |
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2010-01-28, 11:19 PM
#3
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Regular Member
 加入日期: Jul 2009
文章: 59
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請問要如何才可以養成像你這樣?
1. 需要餵食什麼?才可以變成你這樣? 2. 要養多久才可以變成你這樣? 3. 要養多久才可以不用養了? 結論:我終於知道媽媽的偉大了  此文章於 2010-01-28 11:28 PM 被 $.$ 編輯. |
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2010-01-28, 11:26 PM
#4
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*停權中*
加入日期: Apr 2008
文章: 57
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引用:
七個人格輪流 也是蠻快的啊  |
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2010-01-28, 11:29 PM
#5
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Master Member
  
加入日期: Sep 2004 您的住址: 挖西呆巴狼
文章: 1,754
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又下雨了...
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2010-01-28, 11:30 PM
#6
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Power Member
加入日期: Aug 2006 您的住址: 超級猩猩大道
文章: 586
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精子不能養在水缸裡，太冷會死掉..通常都養在精囊..
1.也不用餵什麼，每天吃飯牠就有東西吃了，但聽說吃海鮮比較好 2.頭部的長度為5.6-6微米，寬為2.5-3微米，中段為7.5-9微米，尾巴長度為45微米 3.你有慾望的時侯 |
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2010-01-28, 11:50 PM
#7
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Amateur Member
加入日期: Nov 2003
文章: 32
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樓主可以參考一下2002/06 發表的這篇文章
https://www.hsc.virginia.edu/intern...m-stem-cell.cfm RESEARCHERS DEVELOP SPERM STEM CELL LINE Researchers have immortalized a stem cell line from the testis and used it to reproduce in culture several of the stages of sperm development, according to a study published in Science as part of Science Express web site on June 20. In a collaborative study, researchers from Georgetown University Medical Center, University of Virginia School of Medicine and Northwestern University have developed a mouse cell line capable of spermatogenesis, the process of sperm cell development. The cell line replicates and differentiates in a tissue culture dish providing an in vitro system for scientists to study sperm differentiation. Among other uses, the cell line will provide a novel tool to identify and characterize the molecular cues required for sperm differentiation. Previous efforts to create a cell line with the capacity to undergo spermatogenesis in vitro have been unsuccessful, impeding research in the field. It's a barrier to research progress that has been recognized for at least fifteen years, said John C. Herr, professor of cell biology at the University of Virginia School of Medicine and co-investigator of the study. The understanding of gene regulation during spermatogenesis has been delayed because much of the current work has to be done in transgenic animals. Spermatogenesis is an ordered sequence of molecular signals that results in dramatic cellular changes contributing to the formation of a sperm cell. During this sequence of events, spermatogonia, the immature stem cells in the testis, divide and replicate. Next, a subset of spermatogonia progress into primary and secondary spermatocytes. This developmental step is characterized by meiosis, a specialized cell division process, which decreases the genetic material in the cell. The secondary spermatocytes undergo another round of meiosis to become spermatids, which further progress through morphological changes and become mature sperm cells. The structural changes of the cellular architecture observed during spermatogenesis underscores the complex molecular signals required for this biological process, Herr said. In this study, spermatogonia were immortalized after expressing the catalytic component of telomerase, TERT. Telomerase is an enzyme involved in DNA replication and the expression of TERT has led to the immortalization of other cell types. After one year the immortalized spermatogonial cells still shared the physical and molecular characteristics of spermatogonia. To be useful as a model to study spermatogenesis, the cell line must also have the capacity to differentiate like spermatogonia in vivo, Herr said. In the body, stem cell factor (SCF), a protein ligand that activates a receptor on the surface of spermatogonia, initiates a signaling cascade that triggers the differentiation of the spermatogonia. As spermatogonia in vivo, the spermatogonial cell line treated with SCF underwent two meiotic divisions giving rise to primary and secondary spermatocytes and eventually spermatids. Although tails or flagella, a characteristic of mature sperm, were not seen, various cells had structural features and biomarkers of spermatids. The novel cell line, established from primary mouse spermatogonial cells, displayed matching characteristics of spermatogonial stem cells as they could divide and differentiate in response to the ligand SCF. A cell line has been developed that persists in culture and can be triggered with the appropriate stimulation to express markers of early spermatids, Herr said. The availability of a cell line that recapitulates at least part of the spermatogenesis process opens several new avenues for discovery. We can now isolate some of the factors involved in stage specific differentiation events during spermatogenesis. For a field of research that was once hindered because of the absence of an experimental in vitro model, these findings will prove to be a valuable tool for understanding the intricate progression of spermatogenesis and provide opportunities to transplant genetically altered cells into host animals. It also may lead to strategies to perform gene therapies on the germ line, Herr said. June 20, 2002 |
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2010-01-29, 02:25 AM
#8
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*停權中*
加入日期: Aug 2001 您的住址: my home
文章: 636
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引用:
你不是都養在浴缸裡嗎? 一不小心又造就了一個聖母... |
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2010-01-29, 02:29 AM
#9
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Junior Member
加入日期: Jul 2005
文章: 745
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來人呀~！把餵公子吃洨，把虫養在他嘴裡
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2010-01-29, 05:20 AM
#10
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