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159,588 articles from ScienceDaily

Shedding pounds may benefit your heart -- even if some weight is regained

Weight loss was associated with decreased risk factors for cardiovascular disease and Type 2 diabetes for at least five years -- even if some weight was regained, according to a review of research on behavioral weight loss programs. People who lost weight through an intensive behavioral weight loss program had lower systolic blood pressure levels, total cholesterol-to-good cholesterol ratio and...

The powerhouse of the future: Artificial cells

Researchers identify the most promising advancements and greatest challenges of artificial mitochondria and chloroplasts. The team describes the components required to construct synthetic mitochondria and chloroplasts and identifies proteins as the most important aspects for molecular rotary machinery, proton transport, and ATP production. The authors believe it is important to create artificial...


Temperature of a rocky exoplanet measured

An international team of researchers has used NASA's James Webb Space Telescope to measure the temperature of the rocky exoplanet TRAPPIST-1 b. The measurement is based on the planet's thermal emission: heat energy given off in the form of infrared light detected by Webb's Mid-Infrared Instrument (MIRI). The result indicates that the planet's dayside has a temperature of about 500 kelvins (roughly...

The Greenland Ice Sheet is close to a melting point of no return

A new study using simulations identified two tipping points for the Greenland Ice Sheet: releasing 1000 gigatons of carbon into the atmosphere will cause the southern portion of the ice sheet to melt; about 2500 gigatons of carbon means permanent loss of nearly the entire ice sheet. Having emitted about 500 gigatons of carbon, we're about halfway to the first tipping point.

Colorful films could help buildings, cars keep their cool

The cold blast of an air conditioner can be a relief as temperatures soar, but 'A/C' units require large amounts of energy and can leak greenhouse gases. Today, scientists report an eco-friendly alternative -- a plant-based film that cools when exposed to sunlight and comes in many textures and bright, iridescent colors. The material could someday keep buildings, cars and other structures cool...

New ways to measure curls and kinks could make it easier to care for natural hair

Black women and others with curly or kinky hair encounter a confusing array of haircare options. Advice on the best products to use for a certain type of hair is often contradictory, and the results can be highly variable. Now, scientists are bringing order to this chaos by identifying hair properties that could help users pick the perfect product and achieve consistent results.

Two meteorites are providing a detailed look into outer space

If you've ever seen a shooting star, you might have seen a meteor on its way to Earth. Those that land here can be used to peek back in time, into the far corners of outer space or at the earliest building blocks of life. Scientists have conducted some of the most detailed analyses yet on the organic material of two meteorites.

Human cells help researchers understand squid camouflage

Squids and octopuses are masters of camouflage. But some aspects of how they become reversibly transparent are still 'unclear,' because researchers can't culture cephalopod skin cells in the lab. Now, researchers have replicated the tunable transparency of squid skin in mammalian cells, which are more easily cultured.

Looking from different perspectives! Proper electronic structure of near-infrared absorbing functional dyes discovered

A research group has discovered that near-infrared absorbing dyes, which had previously been considered to have closed-shell electronic structures, have an intermediate electronic structure, between closed- and open-shell structures. They also found that as the wavelength of near-infrared light that can be absorbed becomes longer the contribution of open-shell forms increases within the dye. These...


New type of entanglement lets scientists 'see' inside nuclei

Nuclear physicists have found a new way to see inside nuclei by tracking interactions between particles of light and gluons. The method relies on harnessing a new type of quantum interference between two dissimilar particles. Tracking how these entangled particles emerge from the interactions lets scientists map out the arrangement of gluons. This approach is unusual for making use of entanglement...

Dieting: Brain amplifies signal of hunger synapses

Many people who have dieted are familiar with the yo-yo effect: after the diet, the kilos are quickly put back on. Researchers have now shown in mice that communication in the brain changes during a diet: The nerve cells that mediate the feeling of hunger receive stronger signals, so that the mice eat significantly more after the diet and gain weight more quickly. In the long term, these findings...


Eye color genes are critical for retinal health

Metabolic pathways consist of a series of biochemical reactions in cells that convert a starting component into other products. There is growing evidence that metabolic pathways coupled with external stress factors influence the health of cells and tissues. Many human diseases, including retinal or neurodegenerative diseases, are associated with imbalances in metabolic pathways.