نتایج جستجو برای: human populations

تعداد نتایج: 1834991  

Ghorbanian, Mohammad taghi, Mahal Dashtian, Maryam, Makoolati, Zohreh, Naghdi, Majid,

Spermatogenesis is a highly complex and regulated process in which germ stem cells differentiate into spermatozoa. These stem cells, called spermatogonial stem cells (SSCs), are in the base of seminiferous tubules and have the ability of self-renewal and differentiation into functional germ cells. Due to this ability, SSCs can restore spermatogenesis after testicular damage caused by cytotoxic ...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد تهران مرکزی - دانشکده زبانهای خارجی 1391

the present study has tried to accomplish an analysis of margaret atwood’s novels oryx and crake, and the year of the flood in the light of posthuman and cyborg theories. considering posthumanism as a critical reading of some notions of humanism focus of which in this thesis has been identity, new definitions for humanity and human identity are formed. haraway’s cyborg, as one possible new figu...

Journal: :iranian journal of public health 0
m saadat dd farhud i saadat

the genes glutathione s-transferase m1 (gstm1) and gstt1 code for cytosolic enzymes gstµ and gstθ, respectively, which are involved in phase ii metabolism. in human, both genes may be deleted. in the present study, the genetic polymorphisms of gstm1 and gstt1 were detected by pcr method in 236 healthy individuals from shiraz population, fars province, south of iran. the frequency of gstm1 and g...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - دانشکده علوم 1388

based on the latest records of typhlops vermicularis merrem, 1820 from iran, this species is distributed in the northern and southern regions of the country. in this study, new records of typhlops vermicularis are presented and it is shown that distribution range of this species is extended towards the eastern and western iran, and according to the new distribution map, it can be assumed that t...

Journal: :گوارش 0
ashraf mohamadkhani

in general, both common illnesses and rare diseases can develop in people and their relatives in families. therefore, taking family history is an effective screening tool to detect such diseases and patients should be aware of its importance in families’ health with updating information in regular visiting. for more information on identifying the genetic pattern of diseases, in this article, we...

Journal: :Current Biology 2007
Patricia Balaresque Mark A. Jobling

Patterns of genetic variability in human populations are profoundly influenced by social organisation, including lifestyle, language, religion and social status. A nice illustration is seen among societies that have specific rules about who can marry whom.

Journal: :Science 2002
Noah A Rosenberg Jonathan K Pritchard James L Weber Howard M Cann Kenneth K Kidd Lev A Zhivotovsky Marcus W Feldman

We studied human population structure using genotypes at 377 autosomal microsatellite loci in 1056 individuals from 52 populations. Within-population differences among individuals account for 93 to 95% of genetic variation; differences among major groups constitute only 3 to 5%. Nevertheless, without using prior information about the origins of individuals, we identified six main genetic cluste...

Journal: :Current protocols in immunology 2006
Larry M Wahl Sharon M Wahl Lesley E Smythies Phillip D Smith

This unit describes the isolation of monocytes from lymphocytes by adherence, gradient sedimentation on colloidal silica particles, and flow cytometry. Because the first two methods can result in cell activation (induction of gene expression or protein secretion), and the third is technically difficult, a fourth protocol is presented which describes counterflow centrifugal elutriation. This lat...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2003
Christine Lonjou Weihua Zhang Andrew Collins William J Tapper Eiram Elahi Nikolas Maniatis Newton E Morton

Whereas the human linkage map appears on limited evidence to be constant over populations, maps of linkage disequilibrium (LD) vary among populations that differ in gene history. The greatest difference is between populations of sub-Saharan origin and populations remotely derived from Africa after a major bottleneck that reduced their heterozygosity and altered their Malecot parameters, increas...

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