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39 articles from ScienceDaily

After more than a decade, ChIP-seq may be quantitative after all

For more than a decade, scientists studying epigenetics have used a powerful method called ChIP-seq to map changes in proteins and other critical regulatory factors across the genome. While ChIP-seq provides invaluable insights into the underpinnings of health and disease, it also faces a frustrating challenge: its results are often viewed as qualitative rather than quantitative, making...

Polar climate affects trade wind strength in tropics

The impact of sea surface temperature variations in the tropical Pacific on global climate has long been recognized. For instance, the episodic warming of the tropical Pacific during El Niño events causes melt of sea ice in far-reaching parts of the Southern Ocean via its effect on the global atmospheric circulation. A new study demonstrates that the opposite pathway exists as well.

Memories create 'fingerprints' that reveal how the brain is organized

While the broad architecture and organization of the human brain is universal, new research shows how the differences between how people reimagine common scenarios can be observed in brain activity and quantified. These unique neurological signatures could ultimately be used to understand, study, and even improve treatment of disorders such as Alzheimer's disease.

Biophysics: Geometry supersedes simulations

Physicists have introduced a new method that allows biological pattern-forming systems to be systematically characterized with the aid of mathematical analysis. The trick lies in the use of geometry to characterize the dynamics.

Ribosome assembly: The final trimming step

Ribosomes synthesize all the proteins in cells. Studies mainly done on yeast have revealed much about how ribosomes are put together, but a team now reports that ribosome assembly in human cells requires factors that have no counterparts in simpler model organisms.

There are microplastics near the top of Mount Everest too

Researchers analyzing snow and stream samples have found evidence of microplastic pollution on Mount Everest. While the highest concentrations of microplastics were around Base Camp where hikers and trekkers spend the most time, the team also found microplastics as high up as 8,440 meters above sea level, just below the summit.

A biochemical random number

Scientists have generated a huge true random number using DNA synthesis. It is the first time that a number of this magnitude has been created by biochemical means.

Light-controlled nanomachine controls catalysis

The vision of the future of miniaturization has produced a series of synthetic molecular motors that are driven by a range of energy sources and can carry out various movements. A research group has now managed to control a catalysis reaction using a light-controlled motor.

New insights into memristive devices by combining incipient ferroelectrics and graphene

Scientists are working to create neuromorphic computers, with a design based on the human brain. A crucial component is a memristive device, the resistance of which depends on the history of the device - just like the response of our neurons depends on previous input. Materials scientists analyzed the behavior of strontium titanium oxide, a platform material for memristor research and used the 2D...

Rare species of small cats inadequately protected

The Indian subcontinent is a hotspot for wild felines. A new study now shows that only 6-11 per cent of the areas where three rare cat species have their habitat are protected. Lack of knowledge about these species has been an obstacle to understanding their needs for reserves.