• humans
  • It can be age-related, akin to the lightening of skin and graying of hair in humans. (thenest.com)
  • As some humans moved away from the equator to places where the sun's rays are not nearly as intense, they lost pigmentation, said Jablonski, who reports on her research today (Feb. 16) at the annual meeting of the American Association for the Advancement of Science in Boston. (healthcanal.com)
  • In earlier studies, researchers found that early humans had pinkish skin that was covered with black fur, much like today's chimpanzees. (healthcanal.com)
  • However, following the loss of body hair - which helped the early humans stay active without overheating - permanent dark pigmentation became a crucial evolutionary tool to manage exposure to ultraviolet rays, according to Jablonski. (healthcanal.com)
  • While there is a biological basis for differences in human phenotypes, most notably in skin color, the genetic variability of humans is found not amongst, but rather within racial groups - meaning the perceived level of dissimilarity amongst the species has virtually no biological basis. (wikipedia.org)
  • By the time modern Homo sapiens evolved, all humans were dark-skinned. (wikipedia.org)
  • Studies into these populations indicates that dark skin is a retention of the pre-existing high UV adapted state of modern humans before the out of Africa migration and not a later evolutionary adaptation. (wikipedia.org)
  • The earliest primate ancestors of modern humans most likely had light skin, like our closest modern relative - the chimpanzee. (wikipedia.org)
  • Sodium/potassium/calcium exchanger 5 (NCKX5), also known as solute carrier family 24 member 5 (SLC24A5), is a protein that in humans is encoded by the SLC24A5 gene that has a major influence on natural skin colour variation. (wikipedia.org)
  • SLC24A5 appears to have played a key role in the evolution of light skin in humans of European ancestry. (wikipedia.org)
  • In humans, skin pigmentation varies among populations, and skin type can range from dry to oily. (wikipedia.org)
  • damage
  • 1 Hence, it's important to keep an eye on any changes in pigmentation, as this might hint at damage being done to your skin. (obagi.com)
  • UV radiation from the sun or other sources, such as tanning parlors, can cause many types of damage to the skin and has been associated with a process that leads to many types of skin cancers. (emaxhealth.com)
  • Individuals with lighter skin incur greater damage from UV and thus have significantly higher risk for skin cancer. (emaxhealth.com)
  • What's the best way to treat uneven skin pigmentation due to sun damage? (healthtap.com)
  • A broad spectrum sunscreen with ecamsule, avobenzone and octocrylene significantly reduces the skin damage associated with UV exposure in human subjects. (wikipedia.org)
  • The loss of body hair led to the development of dark skin, which acted as a mechanism of natural selection against folate depletion, and to a lesser extent, DNA damage. (wikipedia.org)
  • It also contains DNA repair enzymes that help reverse UV damage, such that people lacking the genes for these enzymes suffer high rates of skin cancer. (wikipedia.org)
  • removal
  • Your Skin Care specialise in facial treatment, hair cut, threading and hair removal. (streetdirectory.com)
  • Get good skin painlessly without unsightly hair through our safe, proven hair-removal procedures by our experienced staff using cutting edge technology. (streetdirectory.com)
  • Freckle / Skin Pigmentation Removal IPL RF Beauty Equipment Systems Durable I Theory: Advanced technologies, bipolar radio frequency + IPL , can be used together or separately. (frbiz.com)
  • FDA approved skin care medical beauty equipment ipl hair removal skin rejuvenation IPL beauty machine Trait and advantage: 1. (frbiz.com)
  • However, shaving is also the most temporary hair removal method since shaving cuts hair at the surface of the skin instead of removing hair by its follicles. (wikipedia.org)
  • lesions
  • Our work takes as departing point biological data regarding human skin, the pigmentary system and the melanocytes life cycle and presents a reaction-diffusion model for the simulation of the shape features of human‐pigmented lesions. (eg.org)
  • Symptoms include: yellow-brown, banana-shaped fibers caviar-like papules brown-grey or blue-black hyper-pigmentation The majority of the lesions will be seen on areas of the body that get the most sun. (wikipedia.org)
  • color
  • However, while it's important to focus on the end result, it's also important to understand what's happening underneath your skin to affect its pigmentation, or color. (obagi.com)
  • Skin color comes from four different pigments present in our skin: 1. (healthtap.com)
  • Deoxygenated hemoglobin (in the veins) - blue skin color is the combination of these four. (healthtap.com)
  • That skin is colored by the same chemicals that color their hair, albeit in less vibrant hues. (thenest.com)
  • Odds are your cat's skin color is a lighter version of whatever color or colors his hair is. (thenest.com)
  • The latter reflects light in the red to yellow color range as fur and pink as skin. (thenest.com)
  • Sometimes a cat's skin and hair will change color. (thenest.com)
  • The following column discusses the latest technological advancements in the fields of hair care, skin care, oral care, sunscreen, color cosmetics and more. (cosmeticsandtoiletries.com)
  • Dark skin is a naturally occurring human skin color that is rich in eumelanin pigments and having a dark color. (wikipedia.org)
  • In a number of countries, societal variables affect classification as much as skin color, and the social criteria for "blackness" vary. (wikipedia.org)
  • For example, in North America the term black people is not necessarily an indicator of skin color or ethnic origin, but is instead a socially based racial classification related to being African-American, with a family history typically associated with institutionalized slavery. (wikipedia.org)
  • Drug induced pigmentation may take on many different appearances, one of the most common being a change in the color, or pigmentation, of the skin. (wikipedia.org)
  • It was only during the 18th century, that this floating category was transformed in a quasi-scientific system of race and skin color relations. (wikipedia.org)
  • According to anthropologist Nina Jablonski: In ancient Egypt as a whole, people were not designated by color terms […] Egyptian inscriptions and literature only rarely, for instance, mention the dark skin color of the Kushites of Upper Nubia. (wikipedia.org)
  • We know the Egyptians were not oblivious to skin color, however, because artists paid attention to it in their works of art, to the extent that the pigments at the time permitted. (wikipedia.org)
  • Religious conversion was sometimes described figuratively as a change in skin color. (wikipedia.org)
  • This has led to the classification of people(s) on the basis of skin color. (wikipedia.org)
  • melanoma
  • Melanoma, a cancer of melanocytes, is the most deadly of the skin cancers, and its incidence is rising in the United States. (emaxhealth.com)
  • dark
  • She mentioned that I had pigmentation on my skin and my skin was in general very dark. (healingwell.com)
  • I am olive toned so I tend to get a little dark regardless and I always chauked it up to that reason but my husband is more olive skin than me and he doesn't seem to get darker and he hardly wears any sun protection (against my nagging :) ) so you got me wondering now. (healingwell.com)
  • The first two are dark skins and light skins. (ag3derm.com)
  • Wild cats usually have tawny skin, often between dark and light skin. (thenest.com)
  • Tortoiseshell cats and their white-stricken siblings, calico cats, have patches of both dark and light skin. (thenest.com)
  • In rare instances -- most often an XXY sterile male -- male cats will have both dark and light fur and skin. (thenest.com)
  • The evolution of dark skin is believed to have begun around 1.2 million years ago, in light-skinned early hominid species after they moved from the equatorial rainforest to the sunny savannas. (wikipedia.org)
  • Dark-skinned people who live in high latitudes with mild sunlight are at an increased risk - especially in the winter - of vitamin D deficiency. (wikipedia.org)
  • Genetic evidence also supports this notion, demonstrating that around 1.2 million years ago there was a strong evolutionary pressure which acted on the development of dark skin in early members of the genus Homo. (wikipedia.org)
  • The effect of sunlight on folic acid levels has been crucial in the development of dark skin. (wikipedia.org)
  • Numerous communities of dark-skinned peoples are present in North Africa, some dating from prehistoric communities. (wikipedia.org)
  • Egyptian President Anwar Sadat had a mother who was a dark-skinned Nubian Sudanese woman and a father who was a lighter-skinned Egyptian. (wikipedia.org)
  • and the Egyptians - quite like the Colchians - as melánchroes (μελάγχροες, "dark-skinned") and curly-haired. (wikipedia.org)
  • protein
  • This study, led by investigators in the National Cancer Institute (NCI), part of the National Institutes of Health, confirms the importance of SOX9 to adult skin cells and is the first to show that a protein in the SOX family can be regulated by UV radiation. (emaxhealth.com)
  • pregnancy
  • Skin conditions in pregnancy. (obagi.com)
  • http://www.webmd.com/baby/skin-conditions-pregnancy. (obagi.com)
  • Skin pigmentation changes in pregnancy consist of a deepening of the colour of the areolae, and appearance of the linea nigra on the abdomen, together with a change in colour of the vagina and cervix from pink to a deep purple colour due to venous dilatation. (rightdiagnosis.com)
  • pigmentary system
  • Our reaction-diffusion system was developed based on biological data regarding human skin, pigmentary system and melanocytes life cycle. (ufrgs.br)
  • differences
  • citation needed] The assignment of positive and negative connotations of white and black to certain persons date to the very old age in a number of Indo-European languages, but these differences were not necessarily used in respect to skin colors. (wikipedia.org)
  • Sequence variation in the SLC24A5 gene, particularly a non-synonymous SNP changing the amino acid at position 111 in NCKX5 from alanine to threonine, has been associated with differences in skin pigmentation. (wikipedia.org)
  • light
  • The former absorbs almost all light, which makes it appear black as fur and gray as skin. (thenest.com)
  • That's because even short hairs reflect light, giving your cat's skin a shading close to that of his coat. (thenest.com)
  • In the past, that farmer had the right amount of light pigmentation to make it possible for him to produce enough vitamin D in his skin in the summer to satisfy most of his yearly needs. (healthcanal.com)
  • The Egyptians are depicted as a light reddish brown, the Nubians (modern Sudan) as black skinned, the Semites from the Levant (modern Syria) and Canaan (modern Lebanon, Israel and Jordan) as light skinned, and the Berbers of ancient Libya as similarly fair. (wikipedia.org)
  • The SLC24A5 gene's derived threonine or Ala111Thr allele (rs1426654) has been shown to be a major factor in the light skin tone of Europeans compared to Africans, and is believed to represent as much as 25-40% of the average skin tone difference between Europeans and West Africans. (wikipedia.org)
  • cancer
  • Skin Cancer Facts & Statistics. (obagi.com)
  • Skin Cancer Foundation. (obagi.com)
  • http://www.skincancer.org/skin-cancer-information/skin-cancer-facts. (obagi.com)
  • Jablonski said that there are ways to increase vitamin D without increasing the risk of skin cancer through exposure to the sun. (healthcanal.com)
  • UVA rays cause wrinkling and may have some role in development of skin cancer. (wikipedia.org)
  • In studies done in mice it reduces the formation of UV induced pyrimidine dimers and delays the onset of skin cancer. (wikipedia.org)
  • A mouse study shows that it does not increase the probability of promoting skin cancer. (wikipedia.org)
  • help
  • After all, understanding what's happening at a scientific level can provide you with more tools to help you keep your skin as healthy as possible. (obagi.com)
  • To help combat your skin problems, make sure you protect yourself from the sun whenever you are outside for long periods of time. (skincarebeautyzone.com)
  • lighter skin
  • It is theorised that selection for the derived allele is based on the need for sunlight to produce the essential nutrient vitamin D. In northerly latitudes, where there is less sun, greater requirement for body coverage due to colder climate, and frequently, diets poor in vitamin D, making lighter skin more suitable for survival. (wikipedia.org)
  • This may be due to aesthetic or social standing reasons, in areas where a lighter skin tone is considered to be a sign of wealth or beauty. (wikipedia.org)
  • patterns
  • White fur doesn't necessarily signify total albinism: There are several gene combinations that result in partial, lightly colored coats and skin patterns. (thenest.com)
  • harmful
  • This keratinized layer of skin is responsible for keeping water in the body and keeping other harmful chemicals and pathogens out, making skin a natural barrier to infection. (wikipedia.org)
  • venous
  • advances Skin pigmentation becomes brown, Skin venous stasis ulcers may develop, aching and cramping in legs. (coursehero.com)
  • Venous Insufficiency Venous obstruction of venous drainage ↑capillary hydrostatic pressure edema, stasis pain risk of pulmonary embolus stasis ulcers and skin changes Deep Vein Thrombosis Deep Acute venous obstruction due to a thrombus, Acute trauma, thermal injury, septic state and is most commonly seen in the lower extremity. (coursehero.com)
  • infections
  • Minocycline is also used for other skin infections such as MRSA as well as Lyme disease, as the one pill twice daily 100 mg dosage is far easier for patients than the four times a day required with tetracycline or oxytetracycline. (wikipedia.org)
  • human
  • After showing that melanocytes in normal human skin express SOX9 under normal conditions, the investigators exposed normal human melanocytes to UV radiation, and compared the levels of SOX9 between radiated and non-radiated cells. (emaxhealth.com)
  • The researchers exposed normal human melanocytes and reconstructed skin samples to a chemical called forskolin, which stimulates the cAMP pathway. (emaxhealth.com)
  • Thus, we also present a method to transfer the results of our simulation model for textures and images of human skin. (ufrgs.br)
  • In this context, our model contributes to the generation of more realistic skin textures and consequently for the generation of more realistic human models. (ufrgs.br)
  • The outermost layer of human skin is composed of dead stratified squamous, keratinized epithelial cells. (wikipedia.org)
  • The human skin is the outer covering of the body. (wikipedia.org)
  • Human skin is similar to that of most other mammals, and human skin is very similar to pig skin. (wikipedia.org)
  • Though nearly all human skin is covered with hair follicles, it can appear hairless. (wikipedia.org)
  • Such skin variety provides a rich and diverse habitat for bacteria that number roughly 1000 species from 19 phyla, present on the human skin. (wikipedia.org)
  • The skin is the largest organ in the human body. (wikipedia.org)
  • For the average adult human, the skin has a surface area of between 1.5-2.0 square meters (16.1-21.5 sq ft. (wikipedia.org)
  • better source needed] The average human skin cell is about 30 micrometers in diameter, but there are variants. (wikipedia.org)
  • Common
  • The gene's function in pigmentation was discovered in zebrafish as a result of the positional cloning of the gene responsible for the "golden" variety of this common pet store fish. (wikipedia.org)