Articles tagged with Hair
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Scientists found that mice lost 85% of their hair when treated with radiation in the morning, compared to a 17% loss in the evening. This discovery suggests that delivering cancer radiotherapy later in the day may reduce hair loss.
A recent study found that long-term cortisol exposure in seniors is associated with an increased risk of heart disease and stroke. The study used scalp hair analysis to measure cortisol levels over a three-month period, revealing a clear link between chronically elevated cortisol levels and cardiovascular disease.
A study found that pubic hair removal, particularly shaving, can increase the risk of spreading Molluscum contagiosum. Researchers believe micro trauma from hair removal facilitates transmission of the pox virus through self-infection or scratching.
Researchers found that whale baleen traps food particles at natural swimming speeds by tangling in flowing water. The flexible material, composed of keratin, forms plates with internal fibrous cores and bristly fringes that trap particles as whales skim or lunge through the ocean.
Researchers explore nano-channels to selectively unknnot DNA, with potential applications in sequencing and understanding cell metabolism. The study reveals varying channel widths can drastically change DNA knot complexity.
Early humans lost hair to efficiently sweat away heat, later using decorative methods like tattooing and makeup to increase attractiveness. Researchers found evidence of early skin decoration through fossil records and molecular genetics.
A recent study using an animal model revealed that a single genetic mutation led to several common traits in East Asian populations, including thicker hair and denser sweat glands. The researchers found that the mutation is at least 15,000 years old and emerged around 30,000 years ago in central China.
A team of researchers created an animal model of recent human evolution, revealing a single mutation that produced several traits common in East Asian peoples. The study found that the mutation arose around 30,000 years ago in central China and is linked to thicker hair, denser sweat glands, and other skin features.
A tiny insect that eats plants has developed a unique strategy to evade its beetle predator: using the plant's trichomes for physical protection. This clever tactic allows the pest to crawl between the plant hairs and feed on cycad sap, while the larger beetle cannot follow suit.
A study of US biobank collections reveals their vast diversity, with varying reasons for establishment, specimen types, and funding sources. The findings emphasize the need for nuanced policies addressing issues like privacy, research goals, and efficient use of specimens.
A new study uses DNA analysis to reconstruct hair and eye color from ancient human remains, confirming the blue eyes and blond hair of a Polish general. The HIrisPlex system was also able to identify details from medieval samples, including a mysterious woman buried in a 12th-14th century crypt.
A study by Wake Forest Baptist Medical Center reveals that hair care complications are a primary factor deterring African-American women from exercising. The research found that over 40% of respondents reported avoiding exercise due to hair-related issues, with many using heat straighteners or chemical products to style their hair.
A recent study found that nearly 40% of African-American women avoid exercise due to their hair. Hair care and hairstyle maintenance can be costly and lead to sweating, which may deter women from engaging in physical activity. Women with normal scalps were more likely to participate in aerobic exercises.
Health research often focuses on quantifiable aspects, but soccer fans appreciate complexities that make top players excel. Researchers need to tap into these 'intangibles' when evaluating treatments and interventions.
Researchers have successfully synthesized fluorescent gold nanoparticles within human hair for potential use in hair dyeing, electronic sensors, and medical diagnostic tests. The gold particles were formed inside the hair's central core cortex after soaking white hairs in a solution of a gold compound.
The Illacme plenipes, a millipede species from California, boasts the most legs of any animal group, with females reaching up to 750 legs. Its unique anatomy and adaptations enable it to thrive in its limited habitat near San Juan Bautista, where thick fog accumulation provides a specialized environment.
Researchers have discovered the mechanism behind pond skaters' ability to walk on water. They use their middle leg to create swirling vortices, similar to those made by oars in a rowing boat, allowing them to move forward without sinking. The waxy hairs covering their legs also repel water and help generate an upward force.
A new study suggests that elephant skin hair plays a role in heat dissipation, allowing them to maintain a constant body temperature in hot regions. Researchers found that sparse skin hair increases heat loss from the skin, benefiting large terrestrial mammals like elephants.
Scientists at Karolinska Institutet have discovered that the hairs in the inner ear not only move sideways but also change in length when stimulated by sound waves. This finding provides new fundamental knowledge about the mechanisms of hearing and may help develop a new treatment for impaired hearing.
Researchers identified a molecular basis of coat patterning in mammals, revealing that a single gene mutation causes striped tabbies to have blotchy coats. The study used DNA samples from feral cats, captive cheetahs, and domestic cats to uncover the role of a protease called Taqpep.
Researchers at Disney Research developed a system to digitize facial hair and skin, capturing individual strands of facial hair and storing them separately from the human face. The system employs multi-view stereo (MVS) reconstruction to create 3D models of faces with various hairstyles.
Researchers found high levels of exposure to three antiretroviral medications in the hair samples of HIV uninfected infants at twelve weeks of life. The findings indicate a moderate transfer of efavirenz both in the womb and during breastfeeding, while lopinavir and ritonavir were transferred exclusively in the womb.
Research found that wild boars with more reddish hair have higher levels of oxidative stress due to the consumption of glutathione by pheomelanin production. However, surprisingly, gray-haired boars showed signs of good condition and lower oxidative damage. This study suggests that different levels of melanin may have physiological con...
Researchers develop method for separating liquids using individual carbon nanotubes, which act as separation channels for chemically distinct molecules. This technology could prove useful in forensic studies and analyzing molecules from single cells, enabling analysis of trace evidence and invisible stains.
Scientists develop SMARTS, a customizable platform for autonomously regulating chemical reactions and temperature, mimicking biological systems. The material's dynamic feedback loops enable it to sense and modulate desired stimuli without external power, paving the way for intelligent medical implants and efficient buildings.
Researchers found that geckos' toe pads have microscopic hairs that clean themselves by hyperextending their toes. This discovery could lead to reusable adhesives like duct tape.
A novel technique using stable hydrogen isotopes enabled researchers to determine the summer origins of tens of thousands of bats hibernating in three Michigan mines. This could help predict and manage the spread of white-nose syndrome by identifying connected hibernation sites.
The American Chemical Society reports a boom in research on ingredients for 'enhanced cosmetics,' with major companies investing in encapsulation technology to improve appearance. New approaches include microcapsules, water droplets coated in silica, and insulin sugar delivery systems.
A Stanford University School of Medicine study has identified a homegrown genetic variant responsible for naturally blond hair in the indigenous people of the Solomon Islands, distinct from European genes. The research found that the gene variant accounted for 50% of the variance in hair color among the islanders.
Researchers have identified a functional genetic variant responsible for the highest prevalence of blonde hair outside of Europe in the Melanesian population. This finding explains over 45% of the variance in hair color in the Solomon Islands.
Spotted hyenas adapt to changing human food sources during the 55-day Abye Tsome (Lent) fast, shifting from scavenging to hunting, with donkey hairs found in their droppings increasing significantly during Lent
A recent study published in the Journal of the American Academy of Dermatology found that UV photographs can predict melanoma risk factors in 12-year-olds. The study's results suggest that primary care physicians can use UV photography to provide better sun protection counseling, potentially preventing melanoma cases.
Research highlights the importance of proper styling practices for preventing hair and scalp diseases in African-Americans. Dr. Jackson-Richards recommends using natural hair oils and gentle grooming techniques to reduce the risk of conditions like seborrheic dermatitis and alopecia.
Researchers discovered that spiders' legs are protected by branching hairs and a chemical coating, allowing them to move without getting stuck. By carefully maneuvering their legs, spiders minimize adhesive forces while constructing their webs.
Scientists have developed a new form of buckypaper, which eliminates a major drawback of these sheets of carbon nanotubes by introducing a 'shish kebab' structure that controls pore size and conductivity. This innovation has potential applications in body armor, batteries, and electronics.
Researchers at NIST tracked and analyzed ultrafine particles emitted by household appliances, revealing that coagulation, deposition, and ventilation play a significant role in their fate. The study provides valuable insights into the dynamics of these tiny air contaminants and their impact on indoor environments.
A study by University of Illinois at Chicago demographer S. Jay Olshansky found that most US presidents live longer than expected for men of their same age and era. On average, a president's lifespan was 79.8 years during the first eight presidencies
Researchers found that ABCB4, a protein responsible for moving auxin, also removes excess hormone when it accumulates, potentially affecting root growth. The study suggests that the herbicide 2,4-D may impact plants thought to be resistant due to its effect on this protein.
Researchers at Ohio State University developed a high-tech waterproof coating inspired by the unique texture of the Brazilian fern Salvinia molesta. The coating performs similarly to the plant's hairy surface, which traps air and provides stability in water.
Researchers created a dry tape inspired by insects' hairy feet, showing improved adhesive properties and resistance to peeling. The tape can be reused thousands of times without losing its grip, making it suitable for various applications.
The use of nanoparticles in sunscreens has sparked controversy over potential health effects. Scientific evidence suggests a link between particle penetration and undesirable body reactions, but proven benefits in reducing skin cancer risk outweigh theoretical concerns.
Researchers identified three groups of genes required for extensin production, crucial for root hair growth and nutrient uptake. The study sheds light on the assembly of plant cell wall components regulating growth, with potential applications for sustainable agriculture and forestry.
Researchers found that O-glycosylation is essential for root hair growth in Arabidopsis thaliana, increasing growth by 200 times. Blocking this reaction inhibits growth, while over-expressing enzymes involved doubles length and density.
Researchers have discovered a chromosomal mutation responsible for a very rare condition called CGH, which causes individuals to grow excess hair on their bodies. The study found that the insertion of chromosome 5 into the X chromosome appears to turn on a gene, likely SOX3, leading to excessive hair growth.
P&G is pioneering the 'Omics' revolution in beauty and grooming by applying genomics, proteomics, and metabolomics tools to map the entire biological system. This approach enables scientists to identify molecular pathways associated with common concerns in skin and hair biology.
Research by Jennifer K. Bosson and Joseph A. Vandello finds that men's 'precarious' manhood is defined by achievements, not biology, making it vulnerable to social transgressions. This vulnerability leads to aggression as a way to restore manhood, with negative consequences on mental health.
A study of 326 African American women found a high prevalence of central hair loss with clinical signs of scarring, linked to diabetes, bacterial scalp infections, and hairstyles causing traction. Hair styles associated with braids and weaves may lead to prolonged folliculitis and scarring.
A Spanish study reveals that babies who sleep with their smoker parents exhibit three times higher nicotine levels than those in separate rooms. The researchers found that ventilating bedrooms does not effectively reduce toxin exposure from passive smoking.
New research in hair dyeing aims to create longer-lasting, more-natural-looking colors using nano-sized colorants. Gene therapy is also being developed to reverse gray hair, offering new prospects for a younger appearance.
Researchers at UCLA and the Veterans Administration may have accidentally discovered a solution to regrow hair by blocking a stress-related hormone, according to an article published in PLoS One. The compound, astressin-B, induced long-term hair growth in chronically stressed mutant mice through a short-duration treatment.
A French study found that men who start losing hair at age 20 are twice as likely to develop prostate cancer compared to healthy men. The study also suggested that balding may be a potential risk factor for prostate cancer.
Researchers have discovered that DNA can accurately predict a person's hair color, including red, black, blond, and brown, with accuracy rates of over 90%, 80% and 70-80%. The new DNA approach allows for differentiation between similar hair colors.
Researchers at Brown University have developed a method to cut single-walled carbon nanotubes with precision, enabling the creation of higher-quality nanotubes for various applications. The technique involves sonicating the nanotubes in water, causing them to fracture due to compressive atom ejection.
A new study by the University of Utah found that the LouseBuster is highly effective in killing head lice and nits, with 94.8% mortality rate. The device uses warm air to dry out lice and nits, making it a safe and easy treatment option.
Researchers have discovered that specialized bacterial filaments, known as nanowires, can conduct electricity, allowing microbial colonies to thrive. The findings suggest a new way for bacteria to transfer electrons and support each other, potentially leading to breakthroughs in biofilm resistance and sustainable energy.
Researchers at the University of Western Ontario have discovered a link between chronic stress and heart attacks using hair cortisol levels as a biological marker. The study found that heart attack patients had higher cortisol levels in their hair samples compared to control group, suggesting chronic stress as a contributing factor.
Researchers discovered that Venus flytraps convert sugars into carbon dioxide and energy to power their traps, contradicting the idea of passive plants. The plants' digestive process provides a means to capture prey, allowing them to thrive in nutrient-poor environments.
Researchers found that beverage isotopes in hair can serve as chemical fingerprints to pinpoint geographic regions where individuals have been. The study analyzed isotope patterns in bottled water, soda pop, and beer from 33 cities, revealing characteristic 'iso-signatures' for each region.
Severe adverse effects, such as burns and scarring, have been reported from untrained laser hair removal operators. The Canadian Medical Association Journal recommends setting minimum training standards for operators to ensure safe and effective procedures.
Research involving over 5000 people found hair dye and smoking increase risk of primary biliary cirrhosis, a progressive autoimmune liver disease. Smoking was also more common among those with PBC compared to the general population.