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生物医学科技前线

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看看这世界生物医学科学又进步了多少？
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Showing posts older than #4791 · Back to latest

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Post #4790 119
墨西卡尔瓶中蜡虫DNA检测揭密：原来是红色毛蚕幼虫
科学家们对墨西卡尔中的蜡虫进行了DNA检测，结果发现所有采样幼虫都是红色毛蚕幼虫，而不是曾经认为的多种物种混合。虽然这一发现解决了长期的谜团，但也引发了人们对可持续性的担忧。墨西卡尔和食用幼虫的需求量在不断增加，这可能会对野生…
来源: ScienceDaily ｜ 阅读全文
发布时间: 2026-04-26 21:34 GMT+8（北京时间）
#墨西卡尔 #红色毛蚕幼虫 #DNA检测 #可持续性
ScienceDaily Mezcal worm in a bottle DNA test reveals a surprise The famous mezcal “worm” has long puzzled scientists, but DNA testing has finally cracked the case. Researchers found that all sampled larvae were actually agave redworm moth caterpillars—not a mix of species as once believed. While the discovery clears up…
Post #4789 104
DNA研究重写人类起源的历史
通过分析来自非洲多个现代群体的遗传数据，特别是与非洲人群相比，研究人员发现早期人类很可能源自数个交叉杂交的群体，持续数十万年。这些群体之间保持了联系，甚至在大约12万至13.5万年前开始分离后也在遗传基因上保持了联系。
来源: ScienceDaily ｜ 阅读全文
发布时间: 2026-04-26 18:53 GMT+8（北京时间）
#DNA #人类起源 #非洲人群 #遗传数据
ScienceDaily DNA research just rewrote the origin of human species Scientists have uncovered a surprising new picture of human origins that challenges the long-held idea of a single ancestral population in Africa. By analyzing genetic data from diverse modern African groups—especially the highly distinct Nama people—and…
Post #4788 121
恐龙骨骼中发现血管，重写恐龙科学的历史
科学家们在一块被称为斯科蒂的巨型暴龙骨骼中发现了一个保存完好的血管网络，这些血管是在66万年前的骨骼受伤后开始愈合的。通过使用强大的同步辐射X射线，从粒子加速器中，研究人员能够在不损坏的密集化石中观察到细致的铁质结构，留下了愈…
来源: ScienceDaily ｜ 阅读全文
发布时间: 2026-04-26 19:44 GMT+8（北京时间）
#恐龙 #血管 #化石 #同步辐射X射线
ScienceDaily Blood vessels found in T. rex bones are rewriting dinosaur science Dinosaur DNA may still be out of reach, but scientists are uncovering something almost as exciting—ancient blood vessels hidden inside fossilized bones. In a massive Tyrannosaurus rex nicknamed Scotty, researchers discovered a network of preserved vessels…
Post #4787 104
强悍的“绿巨人”蜥蜴正在抹杀数百万年的演化成果
研究发现，长期以来，壁蜥蜴共存了三个不同的颜色类型，每种类型都有其自身的生存策略。然而，现在一种强大的绿色变种正在占据主导地位，击败了其他两种颜色，导致黄色和橙色型蜥蜴消失。这种现象是演化可以比预期的更快地改变脚本的又一例证。
来源: ScienceDaily ｜ 阅读全文
发布时间: 2026-04-26 11:14 GMT+8（北京时间）
#壁蜥蜴 #演化 #绿巨人蜥蜴
ScienceDaily Aggressive “hulk” lizards are wiping out millions of years of evolution For ages, wall lizards coexisted in three distinct color types, each with its own strategy for survival. Now, a powerful green variant is taking over. These dominant “Hulk” lizards are outcompeting the others, causing yellow and orange morphs to vanish. It’s…
Post #4786 134
Warming waters are supercharging an invasive salmon predator in Alaska
As Alaska’s rivers warm, invasive northern pike are becoming noticeably more voracious. Scientists discovered that pike of all ages are eating more fish, with young p…
来源: ScienceDaily ｜ 阅读全文
发布时间: 2026-04-26 11:24 GMT+8（北京时间）
ScienceDaily Warming waters are supercharging an invasive salmon predator in Alaska As Alaska’s rivers warm, invasive northern pike are becoming noticeably more voracious. Scientists discovered that pike of all ages are eating more fish, with young pike increasing consumption by over 60%. Warmer water speeds up their metabolism, pushing…
Post #4785 87
石墨烯杀灭有害细菌 "超级细菌"但不伤害人类细胞
科学家们揭示了石墨烯氧化物如何实现这一壮举：它通过针对仅在细菌膜中存在的分子来猎杀和破坏有害细菌，而不伤害人类细胞。这种由碳组成的超薄材料以激光般的精确性发挥作用，提供了传统抗生素的强大替代品。更令人兴奋的是，它不仅对抗药物…
来源: ScienceDaily ｜ 阅读全文
发布时间: 2026-04-26 13:07 GMT+8（北京时间）
#石墨烯 #抗菌 #超级细菌
ScienceDaily Graphene kills harmful bacteria “superbugs” but spares human cells Scientists have uncovered how graphene oxide pulls off a remarkable trick: it hunts down and destroys harmful bacteria while leaving human cells completely unharmed. By targeting a molecule found only in bacterial membranes, this ultra-thin carbon-based material…
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Post #4784 267
鱼油可能损害大脑，新研究发现
研究人员发现，鱼油中的一种关键Ω-3脂肪酸——EPA，在人们经历反复头部轻微损伤后，可能会干扰大脑修复自己能力。相反，似乎会削弱血管稳定性，破坏愈合信号，并且还会导致与认知下降相关的有害蛋白积累。
来源: ScienceDaily ｜ 阅读全文
发布时间: 2026-04-26 13:57 GMT+8（北京时间）
#鱼油 #大脑 #脑损伤 #EPA #Ω3脂肪酸
ScienceDaily Fish oil may be hurting your brain, new study finds Fish oil has long been praised as brain-boosting, but new research suggests the story may be more complicated. Scientists found that in people with repeated mild head injuries, a key omega-3 fatty acid in fish oil—EPA—may actually interfere with the brain’s…
Post #4783 101
石墨烯杀灭有害细菌“超级细菌”但不伤害人类细胞
科学家们揭示了石墨烯氧化物如何实现这一独特功能：它能有效地捕捉并破坏有害细菌，而不伤害人类细胞。通过针对仅在细菌膜上发现的分子，石墨烯氧化物以激光般的精确性发挥作用——提供了传统抗生素的强大替代品。更令人兴奋的是，它对抗耐药“…
来源: ScienceDaily ｜ 阅读全文
发布时间: 2026-04-26 13:07 GMT+8（北京时间）
#石墨烯 #氧化物 #抗菌 #超级细菌 #耐药性
ScienceDaily Graphene kills harmful bacteria “superbugs” but spares human cells Scientists have uncovered how graphene oxide pulls off a remarkable trick: it hunts down and destroys harmful bacteria while leaving human cells completely unharmed. By targeting a molecule found only in bacterial membranes, this ultra-thin carbon-based material…
Post #4782 140
鱼油可能损害大脑，新研究发现
研究表明，鱼油中的关键ω-3脂肪酸（EPA）可能会干扰大脑修复自身的能力，尤其是在经历了反复轻度头部损伤的人群中。研究发现，EPA可能会削弱血管稳定性，干扰愈合信号，并可能导致与认知下降相关的有害蛋白积累。
来源: ScienceDaily ｜ 阅读全文
发布时间: 2026-04-26 13:57 GMT+8（北京时间）
#鱼油 #大脑 #脑损伤 #omega3脂肪酸
ScienceDaily Fish oil may be hurting your brain, new study finds Fish oil has long been praised as brain-boosting, but new research suggests the story may be more complicated. Scientists found that in people with repeated mild head injuries, a key omega-3 fatty acid in fish oil—EPA—may actually interfere with the brain’s…
Post #4781 123
科学家发现植物细胞生长不受控制的关键因素
研究人员发现，蛋白质PEX11不仅帮助这些结构分裂，还控制它们在早期生长中的大小。当关键基因发生改变时，过氧化物酶体异常增大，表明内部囊泡通常会保持它们的平衡。令人惊奇的是，酵母的蛋白质版本解决了这个问题，指向了物种之间深度保守的…
来源: ScienceDaily ｜ 阅读全文
发布时间: 2026-04-25 12:13 GMT+8（北京时间）
#植物细胞 #过氧化物酶体 #PEX11 #细胞生长
ScienceDaily Scientists just found what keeps plant cells from growing out of control Before seedlings can photosynthesize, they depend on fatty acids—and on peroxisomes to process them. Researchers discovered that the protein PEX11 not only helps these structures divide but also controls their size during early growth. When key genes were…
Post #4780 130
巨型古代昆虫不需要高氧气
科学家长期认为，高氧气水平使得巨型蝴蝶类昆虫的存在成为可能。然而，最新研究发现，昆虫的飞行肌肉并非受氧气限制。它们的呼吸系统有足够的空间扩展，说明氧气水平不足无法解释它们的巨型身形。研究人员现在正在寻找新的答案，如捕食者或昆虫…
来源: ScienceDaily ｜ 阅读全文
发布时间: 2026-04-25 12:38 GMT+8（北京时间）
#巨型昆虫 #古代地球 #氧气水平 #昆虫飞行
ScienceDaily Giant prehistoric insects didn’t need high oxygen after all, study finds Ancient Earth once buzzed with enormous dragonfly-like insects, and scientists long thought high oxygen levels made their size possible. A new study overturns that idea, revealing insect flight muscles weren’t constrained by oxygen after all. Their breathing…
Post #4779 133
史前巨型八爪鱼可能统治了100万年前的海洋
科学家通过在岩石中发现精美保存的化石下颚骨，揭示了早期八爪鱼不是胆怯、软体的漂浮生物，而是巨型掠食者，可能长达20米，具备强大的咬合力。
来源: ScienceDaily ｜ 阅读全文
发布时间: 2026-04-25 20:59 GMT+8（北京时间）
#史前巨型八爪鱼 #化石下颚骨 #古海洋生态
ScienceDaily Giant octopuses may have ruled the oceans 100 million years ago Giant, fearsome octopuses may have once ruled the ancient seas, according to new research that flips the script on their evolutionary past. By uncovering exquisitely preserved fossil jaws hidden inside rock, scientists revealed that early octopuses from the…
Post #4778 112
哈佛科学家发现肠道细菌与抑郁症之间的联系：通过一种隐藏的炎症触发剂
研究人员发现，当Morganella morganii与常见污染物相互作用时，它会产生一种分子，触发炎症，这种炎症与抑郁症密切相关。这一发现有助于解释肠道微生物如何在分子水平影响大脑健康。它还引发了一个新思路，即通过免疫系统而不是仅仅通过大…
来源: ScienceDaily ｜ 阅读全文
发布时间: 2026-04-25 23:39 GMT+8（北京时间）
#抑郁症 #肠道细菌 #炎症 #免疫系统
ScienceDaily Harvard scientists link gut bacteria to depression through hidden inflammation trigger A gut bacterium may be quietly fueling depression through an unexpected chemical twist. Researchers found that when Morganella morganii interacts with a common pollutant, it produces a molecule that triggers inflammation—something strongly linked to depression.…
Post #4777 115
儿童败血症患者的流体治疗选项无差异
一项由NIH支持的研究是迄今为止对儿童败血症患者进行的最大规模研究，旨在比较流体介入以预防儿童败血症休克患者的主要肾脏损伤。
来源: NIH ｜ 阅读全文
#儿童 #败血症 #流体治疗 #肾脏损伤
National Institutes of Health (NIH) Clinical trial finds no difference in fluid treatment options for pediatric sepsis NIH-supported study is largest ever to compare fluid interventions to prevent major kidney damage in children treated for septic shock.
Post #4776 141
世卫组织首次预先批准新生儿和婴儿用抗疟药
世界卫生组织在即将到来的世界疟疾日前宣布，预先批准了专门针对新生儿和幼儿（体重2-5公斤）的一线抗疟药物。该药物预先批准表明该药物符合国际质量、安全和有效性的标准，将有助于扩大对这一最不受惠患者群体的质量保证治疗。
来源: WHO ｜ 阅读全文
发布时间: 2026-04-25 00:11 GMT+8（北京时间）
#世界卫生组织 #预先批准 #抗疟药 #新生儿 #幼儿
World Health Organization WHO prequalifies first-ever malaria treatment for newborns and infants, adds new diagnostic tests Ahead of World Malaria Day on 25 April, the World Health Organization (WHO) has announced a significant step forward in the fight against malaria with the prequalification of the first treatment developed specifically for newborns and young infants weighing…
Post #4775 135
Scientists warn about golden oyster mushrooms sold in Florida markets
The golden oyster mushroom may be a culinary hit, but it’s becoming an ecological problem. Scientists warn it’s spreading quickly through U.S. forests, where it outco…
来源: ScienceDaily ｜ 阅读全文
发布时间: 2026-04-24 21:41 GMT+8（北京时间）
ScienceDaily Scientists warn about golden oyster mushrooms sold in Florida markets The golden oyster mushroom may be a culinary hit, but it’s becoming an ecological problem. Scientists warn it’s spreading quickly through U.S. forests, where it outcompetes native fungi and reduces biodiversity. In just a decade, it has appeared in more than…
Post #4774 117
Largest catch-up initiative delivers over 100 million childhood vaccinations
<ul><li>The Big Catch-Up, launched during World Immunization Week 2023, has delivered over 100 million vaccine doses to an estimated 18.3 million children…
来源: WHO ｜ 阅读全文
发布时间: 2026-04-24 08:01 GMT+8（北京时间）
Post #4773 114
澳大利亚农田下发现完美化石
澳大利亚新南威尔士州的麦克格拉斯平原发现了11-16百万年前的化石，化石在铁质沉积物中被保存，细节完美，包括昆虫器官、鱼眼色素和细致的蜘蛛毛。
来源: ScienceDaily ｜ 阅读全文
发布时间: 2026-04-23 15:15 GMT+8（北京时间）
#化石 #澳大利亚 #新南威尔士
ScienceDaily Scientists find perfect fossils in rust beneath Australian farmland Beneath the dry farmland of New South Wales lies a hidden window into a lost rainforest teeming with life from 11-16 million years ago. At McGraths Flat, scientists have uncovered fossils preserved in astonishing detail—not in typical rock like shale or sandstone…
Post #4772 101
1320万年前的恐龙足迹惊人，重写历史
南非南部地区的古生物学家在西海岸发现了1320万年的恐龙足迹，这是该地区发现的最年轻的恐龙足迹。
来源: ScienceDaily ｜ 阅读全文
发布时间: 2026-04-24 16:14 GMT+8（北京时间）
#恐龙 #足迹 #南非 #古生物学
ScienceDaily Stunning 132 million-year-old dinosaur tracks are rewriting history A long-standing mystery in southern Africa’s fossil record is beginning to unravel. After massive lava flows 182 million years ago seemed to erase evidence of dinosaurs in the region, scientists have now uncovered surprising new clues along the Western Cape…
Post #4771 116
约旦古代大规模坟场揭示了1,500年前的瘟疫如何摧毁一座城市
一处新确认的约旦古代大规模坟场揭示了历史上第一场瘟疫的恐怖景象。数百名瘟疫患者被埋葬在短短几天内，揭示了查士丁尼瘟疫如何摧毁整个社区。研究发现，通常散布在各地的居民突然聚集在死亡中。这是一个强有力的警示，表明瘟疫不仅仅传播疾…
来源: ScienceDaily ｜ 阅读全文
发布时间: 2026-04-24 05:44 GMT+8（北京时间）
#瘟疫 #查士丁尼瘟疫 #约旦 #历史 #考古学
ScienceDaily Ancient mass grave reveals how a pandemic wiped out a city 1,500 years ago A newly confirmed mass grave in ancient Jordan offers chilling insight into one of history’s first pandemics. Hundreds of plague victims were buried within days, revealing how the Plague of Justinian devastated entire communities. The findings show that people…
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