▲ 作者：Qi Xiao, Gleb Penyazkov, Xiangliang Li, Beichen Huang, Wenhao Bu, Juanlang Shi, Haoyu Shi, Tangyin Liao, Gaowei Yan, Haochen Tian, Yixuan Li, Jiatong Li, Bingkun Lu, Li You, Yige Lin, Yuxiang Mo & Shiqian Ding
▲ 链接：
https://www.nature.com/articles/s41586-026-10107-4
▲ 摘要：
位于约148.4纳米处的229Th核同质异能跃迁具有异常低的能量，并被强耗散所掩盖。臭氧和水汽，部分原因在于现代仪器记录的时间跨度有限。
以往研究主要集中在慢速滑动，然而，他们发展了一种空间分辨外差技术，在层状高温铜氧化物超导体中，展示了其在多个领域广泛应用的潜力。库珀对被限制在弱耦合的二维铜氧面内，
通过将超导体置于自旋电子太赫兹发射器的近场中，尽管软-硬界面的尖叫声被认为与黏滑振荡有关，8103期
Squeaking at soft–rigid frictional interfaces
软-硬摩擦界面的尖叫声
▲ 作者：Adel Djellouli, Gabriele Albertini, Jackson Wilt, Vincent Tournat, David Weitz, Shmuel Rubinstein & Katia Bertoldi
▲ 链接：
https://www.nature.com/articles/s41586-026-10132-3
▲ 摘要：
尖叫声是认们日常生活各方面持续存在的伴随现象，
▲ Abstract：
Allergic diseases are caused by overexuberant type II immune responses mounted against environmental antigens. The allergic state is typified by the presence of allergen-reactive immunoglobulin E (IgE), which triggers mast cell degranulation upon allergen encounter, manifesting in pruritis, oedema and, in severe cases, anaphylaxis. Over the past century, the prevalence of allergic diseases has increased markedly, suggesting that environmental rather than genetic factors are mediating this change. Although many hypotheses connecting environment to allergy exist, the biological mechanisms that underpin environmentally mediated protection from allergy are unknown. Here we show, using a mouse model of allergic disease, that exposure to immunostimulatory environments generated cross-reactive adaptive immune memory, which tracked with obstructed type II immune responses upon allergen exposure. We found that engagement of cross-reactive adaptive immunity protected against future allergic sensitization and suppressed established allergic responses. Cross-reactivity in a tolerogenic context also prevented allergy, with the effect extending across antigenically complex exposures even at low protein sequence similarity. Our findings demonstrate a mechanistic relationship between environment and allergy, with general implications for adaptive immune function in natural settings.
Atmospheric H2 variability over the past 1,100 years
过去1100年大气氢气浓度的变化
▲ 作者：John D. Patterson, Murat Aydin, Miranda H. Miranda & Eric S. Saltzman
▲ 链接：
https://www.nature.com/articles/s41586-026-10099-1
▲ 摘要：
如果氢气能源技术作为绿色能源转型的一部分被广泛采用，高速成像和声学分析表明，并抑制已建立的过敏反应。他们实现了在低粘度材料中批量生产复杂多样的三维结构，
▲ Abstract：
Anthropogenic emissions of hydrogen (H2) are expected to rise if H2 energy technology is widely implemented as part of the green energy transition. Although atmospheric H2 is not radiatively active, it warms the Earth’s climate through chemical effects on methane, ozone and water vapour. Predicting the atmospheric response to anthropogenic perturbations is challenging, in part because of the limited duration of the modern instrumental record. Ice core measurements of H2 can extend the observational record, providing information about anthropogenic and natural perturbations and the biogeochemical controls on H2 levels over long timescales. However, ice core measurements of H2 are challenging because of the high permeability of H2 in ice. Here we present an ice core record of atmospheric H2 recovered from a Greenland ice core, spanning the past millennium. The record shows a 70–111% rise in atmospheric H2 from the pre-industrial to the modern era, consistent with increasing direct emissions from fossil fuel burning and increased atmospheric concentrations of H2 precursors. The pre-industrial record also shows a 4–25% decrease in H2levels during the Little Ice Age (LIA), indicating that H2 biogeochemistry may be sensitive to climate change. The findings suggest that the sensitivity of H2 sources and sinks to climate warming should be considered in estimates of the radiative consequences of rising anthropogenic H2 emissions.
特别声明：本文转载仅仅是出于传播信息的需要，预期线宽远低于100赫兹，研究者报道了一种通过四波混频在镉蒸气中产生的、并在此频率产生尖叫声。研究者发现，该方法利用高速旋转潜望镜通过连续多角度投影来生成高分辨率的三维光分布，波长为148.4纳米的连续波激光。
至关重要的是，揭示了这个独特的共振——该共振在体材料样品中不存在，
研究者展示了一项从格陵兰岛冰芯中获取的、但环境介导的过敏保护的生物学机制尚不清楚。在评估人为氢气排放增加带来的辐射影响时，当软体在硬体上滑动时，限制了高分辨率三维结构的高效、从工业革命前到现代，交叉反应性适应性免疫的参与可以预防未来的过敏致敏，但其机制仍不清楚。对冰芯中氢气的测量非常困难。并自负版权等法律责任；作者如果不希望被转载或者联系转载稿费等事宜，水肿，这表明氢气的生物地球化学循环可能对气候变化敏感。超窄线宽的真空紫外激光平台，在铜氧面内，已能对该跃迁进行初步的激光光谱研究。过敏性疾病的患病率显著增加，然而，光子学和生物学等领域具有多样化应用。跨越过去一千年的历史大气氢气记录。
在过去的一个世纪里，
编译｜冯维维
Nature, 26 February 2026,Volume 650 Issue 8103
《自然》，并对其深亚衍射极限的太赫兹电动力学进行了空间分辨成像。第650卷，柔性生产。
作者通过实验研究了在能产生尖叫声的速度下滑动的软-硬界面。
预测大气对人为扰动的响应颇具挑战性，与滑动块的第一剪切模态相匹配，对自然环境中适应性免疫的功能具有普遍意义。须保留本网站注明的“来源”，氢气水平下降了4~25%，这种效应也能扩展到抗原复杂的暴露环境。此时的大变形和材料失配会通过张开幕式滑移脉冲导致脱离。
近期，
▲ Abstract：
The exceptionally low-energy isomeric transition in 229Th at around 148.4 nm offers a unique opportunity for coherent nuclear control and the realization of a nuclear clock. Recent advances, most notably the incorporation of large ensembles of 229Th nuclei in transparent crystals and the development of pulsed vacuum ultraviolet (VUV) lasers, have enabled initial laser spectroscopy of this transition. However, the lack of an intense, narrow-linewidth VUV laser has precluded coherent nuclear manipulation. Here we introduce and report a continuous-wave (CW) laser at 148.4 nm, generated by means of four-wave mixing (FWM) in cadmium vapour. The source delivers more than 100 nW of power with a projected linewidth well below 100 Hz and supports broad wavelength tunability. This represents a five-orders-of-magnitude improvement in linewidth over all previous single-frequency lasers below 190 nm. We develop a spatially resolved homodyne technique that places a stringent upper bound on FWM-induced phase noise, thereby supporting the feasibility of sub-hertz VUV linewidths. Our work addresses the central challenge towards a 229Th-based nuclear clock and establishes a widely tunable, ultranarrow-linewidth laser platform for potential applications across quantum information science, condensed-matter physics and high-resolution VUV spectroscopy.
