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Enzyme from fungi shows molecules which way to turn
A small fungal enzyme could play a significant role in simplifying the development and manufacture of drugs, according to scientists. The Rice lab of chemical and biomolecular engineer Xue Sherry Gao and collaborators isolated a biocatalyst known as CtdE after identifying it as the natural mechanism that controls the chirality — the left- or right-handedness…
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Three critical factors in the end-Permian mass extinction
252 million years ago, volcanic eruptions led to massive climate changes. Around the globe, roughly 75 percent of all land-based organisms and roughly 90 percent of all marine organisms died out as a result. Researchers have now used a new form of machine learning to unravel the causes of the mass extinction in the oceans.…
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Changes in rainfall and temperatures have already impacted water quality
Changes in temperature and precipitation have already impacted the amount of nitrogen introduced into US waterways. This can lead to toxin-producing algal blooms or low-oxygen dead zones called hypoxia. Nitrogen from agriculture and other human activities washes into waterways, which, in excess, creates a dangerous phenomenon called eutrophication. This can lead to toxin-producing algal blooms…
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New CRISPR technology offers unrivaled control of epigenetic inheritance
Scientists have figured out how to modify CRISPR’s basic architecture to extend its reach beyond the genome and into what’s known as the epigenome — proteins and small molecules that latch onto DNA and control when and where genes are switched on or off. In a paper published April 9, 2021, in the journal Cell,…
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Rare African script offers clues to the evolution of writing
Writing evolves to become simpler and more efficient, according to a new study based on the analysis of an isolated West African writing system. But despite its impact on daily life, we know little about how writing evolved in its earliest years. With so few sites of origin, the first traces of writing are fragmentary…
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Increasing frequency of El Nino events expected by 2040
Global weather fluctuations called El Nino events are likely to become more frequent by 2040, a new study shows. El Nino — the unusual warming of surface waters in the eastern tropical Pacific Ocean -affects climate, ecosystems and societies worldwide. The study examined four possible scenarios for future carbon emissions, and found increased risk of…
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Contagion model predicts flooding in urban areas
Inspired by the same modeling and mathematical laws used to predict the spread of pandemics, researchers have created a model to accurately forecast the spread and recession process of floodwaters in urban road networks. With this new approach, researchers have created a simple and powerful mathematical approach to a complex problem. «We were inspired by…
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Long-lasting effects of ironwork on mammal distributions over the last millennium
Pre-modern energy-intensive industries have had long-lasting impacts on macro-ecological patterns. A new study revealed that the impact of pre-modern ironwork starting over 1000 years ago can still be seen in the distributions of small mammals in Japan today. The study offers insights into the history of biodiversity and provides practical knowledge that can be used…
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Like a molten pancake
Why magma flowed along a curved pathway during the 2018 eruption of a Galapagos volcano is explained by a new model. Even before the eruption, the geoscientists in California had seen in radar satellite data that the surface of the flank of the 1140-metre-high Sierra Negra volcano had bulged to a height of about two…
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Balancing food security and nitrogen use
In a new study, researchers explored the possible effects that current nitrogen related mitigation options could have on reconciling regional food security and environmental targets for nitrogen. Nitrogen is crucial to the agricultural sector. Every year, more than 100 million tonnes of nitrogen are applied to crops in the form of fertilizer to ensure that…