2024-03-23 21:04:22动物植物
白色念珠菌毒素在消化道定植中起特殊作用

Candida albicans is a fungus that occurs naturally in the digestive tract of most people. However, the fungus is not always harmless. It can cause mild to severe infections throughout the body. A toxin, candidalysin, is involved in these infections. It ap

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2024-03-23 20:53:33动物植物
1.5亿年前,射线的多样性比以前想象的要多

In a new study published in the journal Papers in Palaeontology, an international team of scientists led by paleobiologist Julia Türtscher from the University of Vienna has explored the puzzling world of rays that lived 150 million years ago and

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2024-03-23 20:39:10动物植物
研究人员确定了玉米根周围微生物组组成的遗传贡献

In order for plants to grow, they absorb water and nutrients through their roots. In doing so, they rely on tiny helpers: bacteria and fungi in particular are found in a thin layer around the roots. These microbes also ward off organisms that are harmful

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2024-03-23 20:28:15动物植物
植物叶片中的细胞如何自我组织以确保光合作用的最佳区域

Plant leaves need a large surface area to capture sunlight for photosynthesis. Dr. Emanuele Scacchi and Professor Marja Timmermans from the Center for Plant Molecular Biology at the University of Tübingen, together with an international team, have now dis

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2024-03-23 20:15:32动物植物
“求爱”基因在两种果蝇中表现出不同的效果

A gene associated with courtship behavior in fruit flies does not operate the same way in two different fruit fly species, a new study finds. The work demonstrates that conserved genes—the same genes found across species—do not necessarily have the same f

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2024-03-23 20:04:36动物植物
研究人员以青蛙科米特的名字命名史密森学会收藏的史前两栖动物祖先

Scientists have uncovered the fossilized skull of a 270-million-year-old ancient amphibian ancestor in the collection of the Smithsonian's National Museum of Natural History. In a paper published today, March 21, in the Zoological Journal of the Linnean

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2024-03-23 19:54:13动物植物
生物多样性的丧失可能加速生态系统的不稳定

What maintains stability within an ecosystem and prevents a single best competitor from displacing other species from a community? Does ecosystem stability depend upon the presence of a wide variety of species, as early ecologists believed, or does divers

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2024-03-23 19:41:46动物植物
破解三把锁需要两把钥匙才能更好地设计血管

Blood vessels engineered from stem cells could help solve several research and clinical problems, from potentially providing a more comprehensive platform to screen if drug candidates can cross from the blood stream into the brain to developing lab-grown

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2024-03-23 19:28:54动物植物
偶然发现一种新的毛茸茸的甲虫

A researcher from The University of Queensland has discovered a remarkable new genus of fluffy longhorn beetle while camping within a rainforest in the Gold Coast hinterland.

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2024-03-23 19:17:16动物植物
研究小组首次确定了油菜素甾体植物激素的神秘出口国

When you are reading this article, there are multiple hormones working diligently inside your body to stabilize your health status. Just as in human beings, it is impossible for plants to grow and reproduce without being regulated by phytohormones. One of

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2024-03-23 19:04:22动物植物
进化生物学家首次发现了一种影响热带蝴蝶视觉偏好的基因

Tropical Heliconius butterflies are well known for the bright color patterns on their wings. These striking color patterns not only scare off predators—the butterflies are poisonous and are distasteful to birds—but are also important signals during mate s

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2024-03-23 18:52:09动物植物
研究揭示了未来药物快速靶向开发的新起点

Many important medicines, such as antibiotics and anticancer drugs, are derived from natural products of bacteria. The enzyme complexes that produce these active ingredients have a modular design that makes them ideal tools for synthetic biology. By explo

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