Early warning signals heralded fatal collapse of Krakatau volcano

On 22 December 2018, a flank of the Anak Krakatau plunged into the Sunda strait between the Indonesian islands of Sumatra and Java, triggering a tsunami that killed 430 people. An international research team has now shown that the volcano produced clear warning signals before its collapse. The researchers recommend to use their study to improve monitoring of volcanoes.

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Product authentication at your fingertips

Chemists have fabricated for the first time plasmonic color-switchable films of silver nanoparticles. Until now, such color changing of nanoparticles was mainly achieved in liquids, limiting their potential for practical applications. The technology has a number of applications: product authentication, color displays, signage, sensors, and information encryption.

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Protozoans and pathogens make for an infectious mix

The new observation that strains of V. cholerae can be expelled into the environment after being ingested by protozoa, and that these bacteria are then primed for colonization and infection in humans, could help explain why cholera is so persistent in aquatic environments. The disease-causing bacteria are protected in the protozoan gut and ejected into the environment in membrane-bound expelled food vacuoles (EFVs).

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Gene responsible for lutein esterification in bread wheat identified

Researchers have identified and confirmed the gene responsible for lutein esterification in bread wheat. The activity of this gene controls the timing of esterification in grain, which is related to storage and nutritional qualities of bread wheat and other grains.

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Stem cell treatments for shoulder and elbow injuries flourish, but so far there's little evidence they work

Two critical reviews examine the current status of biologic approaches for common shoulder and elbow problems. The authors discuss areas where the current evidence base is weak or controversial and recommend where further studies are required.

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