研究潘多拉菌属这种神秘且耐药细菌的科学家们意外发现:这些病原体不仅构成威胁,还能产生强大的天然化合物。通过研究新发现的pan基因簇,科学家鉴定出两种新型分子——潘多拉菌素A和B。这些分子能让细菌从环境中窃取铁元素,使它们在人体等缺铁环境中获得生存优势;同时通过饿死竞争对手抢夺铁资源,可能重塑囊性纤维化等疾病中的微生物群落结构。
阅读全文尽管经历了2000万年的进化分离,两种微型蠕虫在基因开关调控方面仍展现出惊人的相似模式。科学家绘制了发育过程中每个细胞的活动图谱,发现关乎肌肉、消化等基础功能的基因基本保持稳定,而与感知环境或大脑功能相关的基因则呈现更多变异。这种物种间全细胞级别的高分辨率比对研究,可能有助于揭示生命在维持外观稳定的前提下实现进化和适应的奥秘。
阅读全文颠覆传统认知的是,研究人员发现,在密度变化的类海洋流体中,由于吸收盐分的特殊机制,微小的多孔颗粒下沉速度反而比大颗粒更快。科学家通过分层水柱中3D打印琼脂模型进行的精密实验证实:孔隙率和颗粒形态是决定沉降速度的关键因素。这一发现将彻底改变我们对碳循环、微塑料行为的理解,甚至影响海洋碳捕获策略的设计。
阅读全文Ships operate in every ocean, and even the most remote waters aren't off-limits. When they anchor, they leave behind a footprint. Anchoring cannot only disrupt marine life but may also damage undersea cables or pipelines, disrupt communication and cu
阅读全文When Victoria Glynn came to Panama to study the effects of extreme ocean temperatures on coral reefs at the Smithsonian Tropical Research Institute (STRI) as a pre-doctoral fellow in professor Rowan Barrett's lab at McGill University, she drew corals
阅读全文Some queens don't rule nonstop. A new study from the University of California, Riverside shows that even bumble bee queens, the sole founders of their colonies, take regular breaks from reproduction—likely to avoid burning out before their first work
阅读全文Just a few meters beneath the clear, blue waters of Okinawa, reef-building corals known as Scleractinia have quietly lived for centuries. Slowly, layer by layer, they have constructed intricate, rigid structures made of calcium carbonate to form the vibra
阅读全文A team of researchers from Japan, China, and Brazil have discovered a new species of pterosaur from the Late Cretaceous of Japan, marking the first time a pterosaur has been named based on body fossils found in the country.
阅读全文In a major step forward for sustainable pigment production, scientists have successfully engineered the oilseed crop Camelina sativa to produce high levels of astaxanthin—a valuable red antioxidant used to color farmed salmon and shrimp—using plant-derive
阅读全文The question of how life could have emerged is one of the most long-standing mysteries in science. In a new study, the laboratory of LMU Professor Dieter Braun has uncovered an unexpected form of molecular collaboration between the fundamental components
阅读全文Picture a living cell as if it were a city. If you were the urban planner for this (very little, very alive) city, one of the things you would have to decide is how to allocate space for different functional uses.
阅读全文While kelp forests persist along northern Maine's rocky coast, kelp abundance has declined by as much as 80% on the southern coast in recent decades. In its stead, carpet-like turf algae have moved in.
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