BACKGROUND Red hair color is caused by variants of the melanocortin-1 receptor (MC1R) gene. People with naturally red hair are resistant to subcutaneous local anesthetics and, therefore, may experience increased anxiety regarding dental care. The authors tested the hypothesis that having natural red hair color, a MC1R gene variant or both could predict a patient's experiencing dental care-relat...

Hair dye is a cosmetic preparation intended to give the hair new color or restore original color. Purple sweet potato tuber skin contains more anthocyanin that can be used in manufacture of preparations. The extract was prepared by maceration using 96% ethanol. dyes were made into 4 formulas: Formula 0 not added with concentration copper II sulfate, while Formulas 1, 2, and 3 sulfate concentrat...

INTRODUCTION Scalp care is essential because it determines the health and condition of the hair and prevents the diseases of scalp and hair. The objectives of our study were to correlate race and hair types, to determine the awareness of hair care among Malaysian medical students, and to distinguish the factors that affect the health of hair and scalp. METHODOLOGY It was a cross-sectional stu...

*Jerry Bergman, Ph.D., Northwest State College 22-600 State Rt 34, Archbold, OH 43543 Received April 4, 2003; Revised October 13, 2003 Mammal body hair is a complex structure that involves several basic parts, including a shaft, a root, and a follicle. The most common theory currently in vogue is that hair evolved from reptile scales. Although both scales and hair preserve well in the fossil re...

1The terminology used in this report is the one adopted by the 5th International Congress of Pigment Cell Biology held at the New York Academy of Sciences in 1961. into the differentiating medullary and cortical cells of the hair. A number of genes affect hair color in mammals by controlling both the synthesis and transfer of pigment. Investigations of the melanocytes of the hair follicle with ...

Abstract Effect of hair conditioner formulated with Argan oil or Camellia was investigated on the protection damaged by bleaching. Six different rinse-off type conditioners were made basic ingredients and one following conditioning agent; (AO), (CO), Palmitic acid (PA), Stearic (SA), Oleic (OA), Linoleic (LA). L*, a*, b* color values tensile strength, elongation measured, amount protein leak ex...

Polygonum multiflorum Radix (PMR) has long history in hair growth promotion and hair coloring in clinical applications. However, several crucial problems in its clinic usage and mechanisms are still unsolved or lack scientific evidences. In this research, C57BL/6J mice were used to investigate hair growth promotion activity and possible mechanism of PMR and Polygonum multiflorum Radix Preparata...

In this study we investigated the eye colour of human commercial models registered in the UK (400 female and 400 male) and Brazil (400 female and 400 male) to test the hypothesis that model eye colour frequency was the result of negative frequency-dependent selection. The eye colours of the models were classified as: blue, brown or intermediate. Chi-square analyses of data for countries separat...

This study draws on Social Learning Theory and uses a content analysis to critically examine the representations of victims, suspects and offenders on fictional crime television shows. Specifically, four such shows were studied: Law and Order: Special Victims Unit, Criminal Minds, Body of Proof and Rizzoli & Isles. Although some previous research assessed the representations of suspects and off...

In this review article we summarize current knowledge on how variation on the DNA level influences human pigmentation including color variation of iris, hair, and skin. We review recent progress in the field of human pigmentation genetics by focusing on the genes and DNA polymorphisms discovered to be involved in determining human pigmentation traits, their association with diseases particularl...