نتایج جستجو برای: population distribution
تعداد نتایج: 1252143 فیلتر نتایج به سال:
Background and purpose: Human papillomavirus (HPV) often infects humans through sexual contact. Men are carriers of the HPV virus and inadvertently transmit the virus to their sexual partners while being asymptomatic. In many countries strategies are focused on controlling the virus in women and the role of men is ignored. The aim of this study was to determine the prevalence of HPV infection a...
a field experiment was conducted to study the spatial relationships between weed seed bank and population and their distribution models in sugar beet crop (beta vulgaris) in 2009 at motahari agricultural research station of karaj. sampling from seed bank before sugar beet drilling and weed population in three stages during the growing season were done using square (50*50 cm) and rectangle (25*...
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