Medical research

Making a homemade COVID mask? Study explains best fabric choices

Health authorities believe COVID-19 spreads by the transmission of respiratory droplets, and the Centers for Disease Control and Prevention recommends homemade cloth face coverings for use in public spaces. Starting today, ...

Health

Low-calorie sweeteners promote fat accumulation in human fat

Low-calorie, artificial sweeteners appear to play havoc with the body's metabolism, and large consumption of these sugar substitutes could promote fat accumulation, especially in people who are already obese, preliminary ...

Diseases, Conditions, Syndromes

COVID-19: Distancing and masks are not enough

Wear a mask, keep your distance, avoid crowds—these are the common recommendations to contain the COVID-19 epidemic. However, the scientific foundations on which these recommendations are based are decades old and no longer ...

Diseases, Conditions, Syndromes

How do you become infected with the coronavirus?

The new coronavirus has traveled unseen paths from Wuhan, China, to virtually all corners of the globe. Evidence of its movements abound, from the proliferation of people wearing face masks to the sudden absence of toilet ...

Diseases, Conditions, Syndromes

Droplets with coronaviruses last longer than previously thought

It is easier to get infected in winter than in summer—this is true for the Corona pandemic, for influenza and for other viral diseases. Relative humidity plays an important role in this. Outdoors, it is much higher outside ...

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Drop (liquid)

A drop or droplet is a small volume of liquid, bounded completely or almost completely by free surfaces. A drop may form when liquid accumulates at the lower end of a tube or other surface boundary, producing a hanging drop called a pendant drop. Drops may also be formed by the condensation of a vapor or by atomization of a larger mass of liquid.

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