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Climate Change Misconceptions Common Among Teachers,Study Finds
Climate Change Misconceptions Common Among Teachers
2017/7/21
Recent studies have shown that misconceptions about climate change and the scientific studies that have addressed climate change are pervasive among the U.S. public. Now, a new study by Benjamin Herma...
Altered protamine 2 expression is uncommon in donors of known fertility, but common among men with poor fertilizing capacity, and may reflect other abnormalities of spermiogenesis
Semen sperm chromatin fertilization IVF infertility
2008/12/29
During the spermatid elongation stage of spermiogenesis approximately 85% of sperm nuclear histones are replaced by protamines. Protamines increase the packing ratio of sperm chromatin, presumably fac...