Articles tagged with Hair
A new study compares celebrities from People magazine's World's Most Beautiful lists in 1990 and 2017, revealing increased representation of darker skin types and older age groups. The researchers found that traditional beauty standards are evolving as people become more exposed to diverse cultures and media influences.
Researchers at Berkeley Lab have found a way to reversibly change the atomic structure of a 2-D material by injecting electrons, using far less energy than current methods. This process has potential for new electronic memory and low-power switching in ultra-thin devices.
Neandertal DNA has been linked to various human characteristics, including skin tone, hair color, and sleep patterns. The study suggests that sun exposure plays a crucial role in shaping these traits, with Neandertal genes contributing to lighter or darker skin tones.
A team of chemists has developed particles that can form endless architectures from a handful of basic pieces, self-assembling without human intervention. This technology enables the creation of microscopic building blocks with on-board instruction manuals, mimicking nature's manufacturing technology.
Researchers develop eco-friendly leather processing method using molten salts to remove hair and open fibers, reducing pollution output and treatment time. The new process eliminates the use of harsh chemicals like lime and sodium sulfide.
Przewalski's horses have shifted their diet from desert shrubs and leaves in winter to herbaceous plants at all seasons, unlike their ancestors in the past. This change occurred after humans expelled them from steppe communities and forced them into near-desert habitats.
Researchers at UT Austin found that fossilized hair is extremely rare, unlike feathers, due to its composition and preservation conditions. The team analyzed a massive database of fossilized body coverings to determine the frequency of different types of body coverings in exceptional sites.
A recent study published in BMC Ecology found that grey mouse lemurs with high hair cortisol levels had a lower chance of survival. The researchers discovered that low cortisol levels were associated with a 13.9% higher chance of survival compared to those with high levels.
A UBC study found that consumers with low self-esteem are more likely to dislike clothing on mannequins, while those with higher self-esteem see no issue. The effect was not seen in less aesthetically pleasing mannequin displays.
Researchers found that angled hairs can affect fluid flow, slowing it down like a grate. This discovery may help illuminate the role of hairy surfaces in the body and enable the design of new microfluidic devices.
A national survey of pubic hair grooming habits found that 76.1% of participants reported a history of grooming, with 25.6% experiencing injuries such as cuts, burns, and rashes. The study's findings may contribute to the development of clinical guidelines for safe pubic hair removal.
Research highlights the disproportionate impact of beauty product-related chemicals on women of color, who face higher levels of exposure and health risks. The study suggests that marketing practices and societal pressure contribute to this issue, emphasizing the need for improved testing and disclosure to advance environmental justice.
Researchers have identified a cyclic peptide that can bind to hair under shampooing conditions, increasing the deposition of fragrance compounds. This results in stronger fragrance smells on hair for up to 24 hours after shampooing.
Researchers found that Przewalski's horses, now protected in the Gobi Desert, consume only high-quality grass throughout the year due to improved human attitudes. In contrast, Khulan wild asses also live in the same habitat but are still hunted and have a more restricted diet.
A new Northwestern University study reveals that cosmetic complaints have more than doubled from 2015 to 2016, with hair care products being the biggest offender. The lack of regulatory scrutiny and poor reporting by consumers and manufacturers lead to significant under-reporting of adverse events, with only 200-400 reported annually
A study analyzed 5,144 reported adverse events from 2004 to 2016, with a significant increase in hair care product-related incidents between 2015-2016. The findings highlight the need for better cosmetic surveillance due to limited FDA reporting obligations and potential consumer attributions of serious health outcomes.
A new study by Cornell University researchers estimates the densities of black bears in southern New York, finding an average density of about 13 bears per 38.6 square miles. The findings provide clues for how bears might continue to use landscapes farther north as their ranges expand.
A new innovative method developed by Disney Research makes it possible to realistically simulate hair by observing real hair in motion. The framework considers the dynamics of hair and can be used with a wide variety of simulation methods.
When an insect touches the Venus flytrap's sensory hairs, it triggers a chain reaction involving calcium and hormone jasmonate. The plant's glands then produce acidic vesicles filled with hydrochloric acid to decompose the prey.
A prospective observational study found a high association between grey hair and coronary artery disease in adult men. Researchers discovered that as age increases, so does the incidence of both atherosclerosis and hair greying due to similar biological pathways.
Researchers have developed a new scientific technique that can analyze human hair to provide clues about a person's lifestyle. The technique uses liquid chromatography in conjunction with isotope ratio mass spectrometry (LC-IRMS) to identify 15 isotope ratio measurements that potentially yield crucial information about certain lifestyl...
Researchers found that over a fourth of 80 samples tested positive for new psychoactive substances, with 'bath salts' being the most common detected. Hair analysis proved a reliable tool to investigate drug exposure and consumption patterns in this high-risk population.
Researchers at Georgia Tech studied the honeybee cleaning process and found that hair spacing is essential for removing up to 15,000 particles in three minutes. The unique spacing allows the forelegs to collect as much pollen as possible with each swipe.
A study published in Nature found that Aboriginal populations have been continuously present in the same regions for up to 50,000 years, supporting their cultural connection to country. The research analyzed mitochondrial DNA from hair samples collected during anthropological expeditions across Australia and revealed a single founding ...
Researchers created a potentially safer alternative to common hair dye ingredient PPD by mimicking melanin using polydopamine. The new dye lasts through multiple wash cycles without causing noticeable side effects.
Research by UCL scientists found a strong association between long-term stress and obesity, with people experiencing chronically elevated cortisol levels being more prone to weight gain and persistent overweight status.
A study by Russian scientists analyzed the hair of petrochemical workers, finding higher levels of As, Hg, Sn, I, and Si in office workers compared to those in other departments. Essential elements like Cr, Fe, and I were found in higher concentrations in primary oil refining employees, while toxic element content was generally lower i...
Researchers found that high cortisol levels in hair samples tracked closely with standard diagnostic techniques for Cushing Syndrome. The study's findings suggest that hair analysis may prove useful as a less-invasive screening test or confirmatory tool for the condition.
Scientists create new structural color material that showcases consistent color from all viewing directions, overcoming conventional wisdom about long-range order photonic structures. The innovative design has a wide viewing angle of 160 degrees, making it suitable for applications such as phone and television screens.
Surgical site infections affect up to 300,000 patients annually, with an estimated annual cost of $3.5 billion to $10 billion. The new guidelines recommend measures such as quitting smoking, controlling blood sugar, and using antibiotic sutures to reduce the risk of SSIs.
Researchers at UC San Diego discovered that hair behaves differently depending on stretching speed, with faster stretches making it stronger. The team found a unique structural transformation allowing hair to withstand high stress without breaking.
Scientists have combined hair-like wires with electronic skin to make a more versatile sensor for robots and prosthetics. The new device can detect air flow, pressure, and slip forces, allowing it to mimic the sensations felt by humans.
Research found that pubic hair grooming is associated with a heightened risk of acquiring sexually transmitted infections, particularly among high frequency and intensity groomers. Grooming was linked to an 80% increased risk of infection, with certain practices causing higher risks for specific infections.
Researchers analyzed hair samples from Tycho Brahe's remains and found significantly higher levels of gold than expected in a typical person. This suggests that Brahe was exposed to gold through his daily life, potentially through jewelry, elixirs, or alchemy.
Hair loss and breakage caused by acquired trichorrhexis nodosa (TN) can be reduced with proper cleansing and styling. Researchers recommend choosing the right shampoo based on hair type and minimizing frequent washing for those with tightly curled or dry hair. Conditioners, especially protein-containing ones, are also crucial for healt...
Researchers found mutations in three genes involved in forming the hair shaft, which causes uncombable hair syndrome, a rare condition affecting around 100 documented cases worldwide. The discovery provides insights into mechanisms of healthy hair formation and secures clinical diagnosis with molecular genetic methods.
Researchers at U of T Engineering developed an AI algorithm that learns directly from human instructions, exceeding conventional training methods by 160% and outperforming its own training by 9%. The algorithm's potential lies in applying heuristic training to fields like medicine and transportation.
Researchers have discovered that adding melanin to polyurethane increases its tensile strength and toughness by up to 10 times. The enhanced material can stretch farther before breaking, making it a promising alternative for various applications.
Researchers identify Alx3 gene as key to African striped mouse's characteristic light-colored stripes. Analysis reveals similar stripe patterns in North American chipmunks, indicating independent evolution of trait.
Researchers developed a new method using atomic force microscopy to quantify the mechanical properties of hair, documents, fingerprints, and explosives. This can help improve the accuracy and reliability of forensic practices.
A new species of leggy millipede, named Illacme tobini, has been discovered in a California cave. The species boasts over 414 legs, similar to its cousin Illacme plenipes, but with unique features like poison glands and silk-secreting hairs.
A new study found that elevated cortisol levels measured in hair can predict IVF success rates, with women having almost a third less chance of conceiving. The technique enables doctors to measure cumulative hormonal function over 3-6 months, providing a more reliable measure than short-term methods.
Beardedness is associated with increased attractiveness in women when evaluating long-term relationships due to its signal of formidability and potential benefits. Stubble appears most appealing for short-term connections, while full beards are preferred for long-term partnerships.
Researchers discovered that jumping spiders can detect sounds at distances of over three meters, a finding that changes scientists' understanding of the world spiders live in. The spiders' hearing is most sensitive to frequencies associated with the wingbeats of parasitoid wasp enemies, prompting a startle response.
Researchers fabricate fur-like, rubbery pelts to trap warm pockets of air in dense layers of fur. The findings provide a detailed mechanical understanding of how mammals insulate themselves while diving underwater.
Researchers found that bonobos' diets differ with social rank in males and reproductive stages in females, revealing a high protein diet during pregnancy and an energy-rich diet during lactation. These findings suggest that the diet of great apes may be influenced by sociodemographic factors.
Researchers have identified a unique set of protein markers in human hair that could be used to distinguish individuals. The findings demonstrate the robustness of these proteins and estimate that they would be sufficient to provide a unique pattern for an individual among a population of one million.
A survey of 122 people found that men with hair transplants were rated as more youthful, attractive, successful, and approachable compared to those without. Hair loss was associated with a negative perception of attractiveness.
Scientists have created a new material called Nanofur that mimics the water-repellent and oil-absorbing properties of aquatic fern leaves. This innovative material is highly effective in cleaning up oil spills, with some leaves absorbing up to 30 seconds' worth of oil.
African-American adolescent girls prefer straightened hair and avoid sweating during exercise due to concerns about ruining their hairstyle. The study explores the impact of cultural pressure on physical activity among black teens, finding a consistent theme across three states.
After decades of research, scientists have made significant progress in understanding and treating PCOS, identifying potential biomarkers and developing new diagnostic tests. The review highlights innovative approaches, including genetic testing and hormone analysis, to improve early treatment strategies and prevent long-term complicat...
The study reveals dynamic changes of poly(A) tails in eggs and embryos, furthering understanding of how the fabric of life is shaped. The improved sequencing tool mTAIL-seq allows for enhanced sequencing depth to measure poly(A) tail length at a genomic scale.
A new system called Dreambit predicts how a person would look with different hairstyles, colors, and appearances by analyzing input photos and searching the internet for similar images. The software can also age-progress faces and help identify missing children or people evading the law.
A survey of 3,316 US women found that 84% reported grooming their pubic hair, with daily grooming rare. Factors influencing grooming habits include partner preference and education level.
A new Colombian tarantula species has been discovered, featuring extraordinary defensive hairs that challenge traditional attack methods. The species, Kankuamo marquezi, is named after Gabriel Garcia Marquez and honors an indigenous people from the Caribbean coast.
Researchers demonstrate that hairs, feathers and scales share a common evolutionary origin, developing from placodes with similar molecular signatures. The study provides new insights into the evolution of skin appendages and their diversity.
Scientists from Wits University discovered that mammal-like reptiles evolved hair around 240-246 million years ago, assisting their survival. This discovery suggests a possible link between the evolution of hair and whiskers with the development of mammals.
The researchers designed arrays of hair-like structures with resolutions as low as 50 microns, printing coarse bristles to fine fur onto flat and curved surfaces. They demonstrated the technology's capabilities by creating Velcro-like bristle pads, sensing systems, and actuation devices.
Researchers at the University of Bristol discovered that bumblebees' tiny hairs deflect in response to electric fields, but only the hairs alert the bee's nervous system. This finding suggests that electroreception in insects may be more common than previously thought.
Researchers from Bonn University discovered calcium phosphate as a structural biomineral in rock nettle plants, providing them with a hardened defense mechanism against herbivores. The unique material, structurally similar to reinforced concrete, is used instead of silica or calcium carbonate in most plants.