Earth
Hot summer weather, stressful situations and intense workouts can produce unpleasant sweaty odors. But what if clothing could cover up these embarrassing smells with a burst of fragrance? Now, researchers have modified cotton fabric to emit a lemony citronella aroma upon contact with sweat. They report their body-odor-fighting strategy in ACS Applied Materials & Interfaces.
Studies of youth and their experiences with depression have tended not to include Indigenous youth. A new study that analyzed data on the development of depressive symptoms among Indigenous youth in the United States and Canada found that many of the youth had experienced these symptoms during adolescence. The study also identified the risks associated with developing symptoms of depression and how depressive symptoms were associated with alcohol use disorder.
Understanding how antibiotic scaffolds are constructed in nature can help scientists prospect for new classes of antibiotics through DNA sequencing and genome mining. Researchers have used this knowledge to help solve the X-ray crystal structure of the enzyme that makes obafluorin -- a broad spectrum antibiotic agent made by a fluorescent strain of soil bacteria. The new work from Washington University in St. Louis and the University at Buffalo is published July 31 in the journal Nature Communications.
Late in pregnancy, the human body carefully prepares fetuses for the rigors of life outside the protection of the womb. Levels of cortisol, a stress hormone, ramp up and spike during labor. Catecholamines, another stress hormone, also rise at birth, helping to kick start the necessary functions that the baby will need to regulate breathing, heartbeat, blood pressure and energy metabolism levels at delivery. Oxytocin surges, promoting contractions for the mother during labor and stimulating milk production after the infant is born.
Imagine your favorite beach filled with thousands of ducks and gulls. Now envision coming back a week later and finding condos being constructed on that spot. This many ducks in one place surely should indicate this spot is exceptionally good for birds and must be protected from development, right?
It depends, say Michigan State University researchers.
COLUMBIA, Mo. - Research has shown that, despite great efforts, one in three children continue to experience bullying in school. However, research also has indicated that environmental and psychological factors might play an important role in minimizing bullying behaviors.
Cloud top temperatures provide information to forecasters about where the strongest storms are located within a tropical cyclone. NASA's Aqua satellite took Tropical Storm Flossie's cloud top temperatures to get that information.
NASA's Aqua satellite analyzed the storm on July 29, at 6:35 a.m. EDT (1035 UTC) using the Atmospheric Infrared Sounder or AIRS instrument. The stronger the storms, the higher they extend into the troposphere, and they have the colder cloud temperatures.
CORVALLIS, Ore. - West Coast forest landowners are expected to adapt to climate change by gradually switching from Douglas-fir to other types of trees such as hardwoods and ponderosa pine, according to a new Oregon State University study.
The study, the first to estimate an economic model of forest-planting choices by landowners as a function of climate, is published in the Journal of the Association of Environmental and Resource Economists.
Hurricane Erick has become the first tropical cyclone to enter the Central Pacific Ocean during the 2019 Hurricane Season and Hawaii is keeping an eye on the storm. NASA's Aqua satellite is also keeping eyes on Erick, too, and analyzed the water vapor content within the storm.
WASHINGTON, D.C., July 23, 2019 -- Several screening tests for cervical cancer have been developed in recent years. One technique uses immunofluorescent staining to determine the levels of biomarkers to indicate a cell is undergoing HPV-related cancerous growth. Immunostaining for these proteins, however, can be time-intensive. One new approach, discussed in this week's Biomicrofluidics, from AIP Publishing, looks to provide a way to screen cervical cells with immunostaining more efficiently, drawing inspiration from an unlikely source.
Osaka, Japan - The bacterial genus Mycobacterium has the dubious honor of including species responsible for two of the best-known chronic human infectious diseases: tuberculosis and leprosy. But unlike their more famous cousins, for which effective treatment strategies have long been available, it is the 200 or so lesser known Mycobacterium species that are currently causing a resurgence in pulmonary diseases in recent times.
Physical activity has many well-known health benefits, but its association with lung function in childhood and adolescence is not well understood. A new study by the Barcelona Institute for Global Health (ISGlobal), a centre supported by "la Caixa", has for the first time demonstrated an association between regular physical activity during childhood and higher lung-function values in adolescent girls.
For the first time, researchers from the University of Copenhagen have studied and outlined the development of sebaceous glands in the skin. The study provides greater insight into the development and maintenance of the skin and how cancer mutations affect the behaviour of stem cells.
Most people are familiar with the sebaceous glands which are responsible for moisturising the skin, and during puberty sometimes more so. But even though the glands are a main component of our skin, scientists know surprisingly little about how they form and how they are subsequently maintained.
The cell polarity protein Par3 controls mechanic changes in the skin and plays an important role in cell division. Malfunction can lead to DNA damages. The balance of the system is of great importance: while too much differentiation leads to loss of stem cells and therefore premature aging, too many cell divisions can be a cause of skin cancer. The new study by a team around Sandra Iden about how polarity regulators control cellular mechanics in the skin was now published in Nature Communications.
The human ranging style is unique among hominoids. The Mbendjele BaYaka people move from camp to camp every few months, and thus have a large lifetime range of approximately 800 square meters. Human foragers collect food and take it back to their camp to process and share. Furthermore, the Mbendjele BaYaka have created a trail system and walk mostly on trails. In contrast, one of our closest living relatives, chimpanzees, live in a relatively smaller area (25 square meters) and spend most of their adult lives within the same home range.