نتایج جستجو برای: hair color
تعداد نتایج: 155697 فیلتر نتایج به سال:
The MC1R gene plays a crucial role in pigmentation synthesis. Loss-of-function MC1R variants, which impair protein function, are associated with red hair color (RHC) phenotype and increased skin cancer risk. Cultured cutaneous cells bearing loss-of-function MC1R variants show a distinct gene expression profile compared to wild-type MC1R cultured cutaneous cells. We analysed the gene signature a...
Background: Although the expansion of innovation in the industry has led to an increase in the fast of works, production and productivity, it has also imposed an increase in the incidence of musculoskeletal disorders. So, the aim of this study was determination the risk level of work posture by REBA and RULA method among workers of assembly line of a cosmetic manufacturing factory. Methods: Th...
BACKGROUND There is evidence that glycosaminoglycans (GAGs) are present in the hair shaft within the follicle but there are no studies regarding GAGs isolation and measurement in the human hair shaft over the scalp surface, it means, in the free hair shaft. OBJECTIVE The purpose of our research was to isolate and measure the total GAGs from human free hair shaft. METHODS Seventy-five health...
BACKGROUND Allogeneic skin grafts onto C57BL/6 mice are rejected, and the rejected skin is replaced by surrounding skin with black hair. In contrast, syngeneic skin grafts are tolerated, and gray hair grows on the grafts. METHODS To explore the mechanism of gray hair growing on the tolerated skin grafts, we prepared full-thickness skin (2-cm square) autografts, 2 (2 cm + 2 cm) horizontal or v...
Modern sophisticated analytical tools have enabled toxicologists to investigate hair specimens for the presence of drugs. Although great sensitivity and specificity in hair analysis have been already achieved, some concerns about bias due to hair color, lack of reference materials, and dose versus concentration relationship make the quantitative data sometimes debatable. The most commonly held ...
One of the oldest and most well-known cosmetics, hair color has been used by numerous ancient cultures throughout history on both men women. It involves treating with various chemical compounds for changing color. According to how long they remain in hair, these products are primarily divided into two categories: temporary permanent. This classification is consistent types active substances dye...
Individuals with two red hair colour (RHC)-MC1R genetic variants have light skin and blond/reddish hair and, in comparison with those without such alleles, are at an increased risk of developing melanoma. Our study investigated the association of RHC variants and the Total Dermo-scopy Score (TDS), and the items that make up the TDS, in those with atypical naevi and melanomas from high risk mela...
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