Earth

According to Paul Coleman, an Alzheimer's researcher at the ASU-Banner Neurodegenerative Disease Research Center (NDRC), one of the greatest difficulties plaguing efforts to find effective treatments for Alzheimer's is the enormous lag between the disease's inception and the appearance of clinical symptoms.

In a new study, Coleman and his colleagues demonstrate the promise of an early blood test for Alzheimer's disease. The results suggest that Alzheimer's can be detected even before the onset of symptoms in persons at genetic risk for Alzheimer's disease.

Former Tropical Storm Kenneth continues to maintain gale-force winds but appears to be devoid of any strong thunderstorms in satellite imagery.

At 5 p.m. EDT (2100 UTC) on Aug. 23 the National Hurricane Center (NHC) issued the final advisory on Kenneth. NHC said the center of Post-Tropical Cyclone Kenneth was located near 25.4 degrees north latitude and 135.6 degrees west longitude. Maximum sustained winds were near 40 mph (65 kph).

NASA examined Harvey as it began to intensify and organize and found heavy rainfall in the system. NASA also created an animation that showed Harvey's intensification from a low pressure area into a hurricane.

Physicist Fatima Ebrahimi at the U.S. Department of Energy's (DOE) Princeton Plasma Physics Laboratory (PPPL) has for the first time used advanced models to accurately simulate key characteristics of the cyclic behavior of edge-localized modes (ELMs), a particular type of plasma instability. The findings could help physicists more fully comprehend the behavior of plasma, the hot, charged gas that fuels fusion reactions in doughnut-shaped fusion facilities called tokamaks, and more reliably produce plasmas for fusion reactions.

NASA's Aqua satellite provided an infrared look at the newly formed Tropical Depression 16W in the Philippine Sea. 16W is known locally in the Philippines as "Jolina."

In the Philippines, public storm warning signal #1 was placed in effect for the Luzon provinces of Southern Cagayan, Isabela, and Northern Aurora.

Photosynthesis is a biological process mediating the conversion of solar energy into chemical energy. The so-called oxygenic photosynthesis, performed by plants, algae and cyanobacteria, is one of the most amazing chemical reactions on the planet. It provides food and energy for nearly all living organisms, and also contributes to the formation of the atmosphere and maintenance of the carbon-oxygen balance on the earth.

The intestine contains an extensive and diverse microbial flora, including potential pathogens and dietary antigens that needs to be tolerated. Dysregulation of mucosal responses may cause a loss of tolerance, leading to harmful intestinal inflammation such as human inflammatory bowel disease (IBD).

A majority of shark fins and manta ray gills sold around the globe for traditional medicines come from endangered species, a University of Guelph study has revealed.

Using cutting-edge DNA barcoding technology, researchers found 71 per cent of dried fins and gills collected from markets and stores came from species listed as at-risk and therefore banned from international trade.

Each atomic layer thin, tear-resistant, and stable. Graphene is seen as the material of the future. It is ideal for e.g. producing ultra-light electronics or highly stable mechanical components. But the wafer-thin carbon layers are difficult to produce. At the Technical University of Munich (TUM), Jürgen Kraus has manufactured self-supporting graphene membranes, and at the same time systematically investigated and optimized the growth of the graphene crystals. He was awarded the Evonik Research Prize for his work.

Within the next century, rising ocean temperatures around the Galápagos Islands are expected to make the water too warm for a key prey species, sardines, to tolerate. A new study by Wake Forest University biologists, published in PLOS ONE Aug. 23, uses decades of data on the diet and breeding of a tropical seabird, the Nazca booby, to understand how the future absence of sardines may affect the booby population.