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24 articles from ScienceDaily

Mitochondrial function can play significant part in serious disease

Disorders of the cells' energy supply can cause a number of serious diseases, but also seem to be connected to ageing. More research is needed on mitochondrial function to find future treatments. A new study shows how an important molecule inside the mitochondria affects their function in mice and fruit flies. The study adds valuable knowledge on formerly relatively unexplored protein...

A speed limit also applies in the quantum world

Even in the world of the smallest particles with their own special rules, things cannot proceed infinitely fast. Physicists have now shown what the speed limit is for complex quantum operations. The results are important for the realization of quantum computers, among other things.

The melting of large icebergs is a key stage in the evolution of ice ages

A new study, in which the Andalusian Earth Sciences Institute (IACT) (CSIC-UGR) participated, has described for the first time a key stage in the beginning of the great glaciations and indicates that it can happen to our planet in the future. The study claims to have found a new connection that could explain the beginning of the ice ages on Earth.

Evidence of protein folding at site of intracellular droplets

Researchers have found that elevated concentrations of proteins within the droplets triggered a folding event, increasing the potential for protein aggregation -- or misfolding -- which has been linked to neurological diseases including Alzheimer's disease and amyotrophic lateral sclerosis (ALS).

Life of a pure Martian design

Experimental microbially assisted chemolithotrophy provides an opportunity to trace the putative bioalteration processes of the Martian crust. A study on the Noachian Martian breccia Northwest Africa (NWA) 7034 composed of ancient crustal materials from Mars has now delivered a unique prototype of microbial life experimentally designed on a real Martian material.

How the brain processes sign language

Over 70 million deaf people use sign languages as their preferred communication form. Although they access similar brain structures as spoken languages, it hasn't been identified the brain regions that process both forms of language equally. Scientists have now discovered that Broca's area in the left hemisphere, central for spoken languages, is also crucial for sign languages. This is where the...

Sweet marine particles resist hungry bacteria

Rather sweet than salty: In the ocean microalgae produce a lot of sugar during algae blooms. These enormous quantities of algal biomass are normally recycled rapidly by marine bacteria, degradation process that is an important part of the global carbon cycle. Especially sugars have been considered as easily digestible and therefore poor candidates for natural carbon sequestration. Now scientists...

Tuberculosis: New biomarker indicates individual treatment duration

The treatment of tuberculosis (TB) is long and demanding. In particular, in cases of resistant tuberculosis, the WHO generally recommends a standard treatment duration of at least 18 months, as there are no reliable biomarkers for an early termination. Scientists have now succeeded in identifying a biomarker that points to an individual end of therapy based on the activity of 22 genes. In many...

Global study of 48 cities finds nature sanitizes 41.7 million tons of human waste a year

Researchers found that nature provides at least 18% of sanitation services in 48 cities worldwide, according to researchers in the United Kingdom and India. The study estimates that more than 2 million cubic meters of the cities' human waste is processed each year without engineered infrastructure. This includes pit latrine waste that gradually filters through the soil -- a natural process that...

Swimming upstream on sound waves

Scientists have succeeded in propelling microvehicles against a fluid flow using ultrasound. In future, these tiny vehicles are set to be introduced into the human bloodstream, thereby revolutionizing the field of medicine.

Quartz crystals in the stomach of fossil bird complicates the mystery of its diet

The fossil of a bird that lived alongside the dinosaurs was found with some sort of rocks in its stomach. Previously, researchers thought that these rocks were swallowed on purpose to help clean its stomach, like modern birds of prey do, giving a hint at its diet. But in a new study, scientists discovered that these rocks are quartz crystals that likely formed after the bird died -- its diet is...