نتایج جستجو برای: human age
تعداد نتایج: 2307072 فیلتر نتایج به سال:
The International Database of Longevity (IDL) offers detailed information on thoroughly validated cases of supercentenarians. These data are used to estimate human mortality after age 110. The procedure properly accounts for the country-specific sampling frames in the IDL. The analysis confirms that human mortality after age 110 is flat at a level corresponding to an annual probability of death...
Background: The negative impact of age on reproductive success has been well demonstrated for women, but age-related changes in the male reproductive system appear to be more subtle. Diminishing testicular function is indicated by a decline in testosterone levels, accompanied by an increase in gonadotropins. Some studies have shown increased age-related numerical and structural sperm chromosoma...
Trace element analyses was carried out using Atomic Absorption Spectrophotometer and XRF on a small collection of bones and teeth from horse and human bone samples to check the ratio of strontium and calcium and other elements like zinc and copper. Interestingly the copper representation in humans is much higher compared to that of Sr/Ca. This shows that their diet consisted mainly of animal me...
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