نتایج جستجو برای: reticulate pigmentation

تعداد نتایج: 12004  

Journal: :Journal of Computational Biology 2013

Journal: :American journal of physical anthropology 2006
Heather L Norton Jonathan S Friedlaender D Andrew Merriwether George Koki Charles S Mgone Mark D Shriver

Skin and hair pigmentation are two of the most easily visible examples of human phenotypic variation. Selection-based explanations for pigmentation variation in humans have focused on the relationship between melanin and ultraviolet radiation, which is largely dependent on latitude. In this study, skin and hair pigmentation were measured as the melanin (M) index, using narrow-band reflectance s...

Journal: :Investigative ophthalmology & visual science 1980
L N Thibos W R Levick R Morstyn

Ocular pigmentation in white cats with blue and yellow eyes and in Siamese cats was examined ophthalmoscopically and histologically. Yellow-eyed white cats had entirely normal ocular pigmentation. Blue eyes of white cats had normal pigmentation of the iridial and retinal pigment epithelia but no stromal pigmentation of the iris or choroid. This deficit is apparently due to the absence of stroma...

2014
Katayama Ono

The pigmentation of human gingival tissue is derived from melanin granules, which are synthesized in the melanosomes of melanocytes [1,2]. The nicotine present in tobacco activates melanocytes to promote melanin secretion [3]. Therefore, the melanin pigmentation in gingival tissues has a strong correlation with smoking [4,5]. In 1977, Hedin et al. [5] first reported that smokers showed more pig...

Journal: :Molecular ecology 2016
Dingqiao Wen Yun Yu Matthew W Hahn Luay Nakhleh

The role of hybridization and subsequent introgression has been demonstrated in an increasing number of species. Recently, Fontaine et al. (Science, 347, 2015, 1258524) conducted a phylogenomic analysis of six members of the Anopheles gambiae species complex. Their analysis revealed a reticulate evolutionary history and pointed to extensive introgression on all four autosomal arms. The study fu...

2014
Carlos Tamulonis Jaap Kaandorp

The filamentous cyanobacterium, Pseudanabaena, has been shown to produce reticulate patterns that are thought to be the result of its gliding motility. Similar fossilized structures found in the geological record constitute some of the earliest signs of life on Earth. It is difficult to tie these fossils, which are billions of years old, directly to the specific microorganisms that built them. ...

Journal: :Proceedings of the National Academy of Sciences 2014

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