Science Bulletin最新文献_第6页

Attribution of surface water changes in Jing-Jin-Ji region from satellite imagery. 基于卫星影像的京津冀地区地表水变化归因

IF 21.1 1区综合性期刊

Science Bulletin Pub Date : 2026-04-17 DOI: 10.1016/j.scib.2026.04.043

Shuqiu Yang, Bailu Liu, David Makowski, Liu Liu, Junxiong Huang, Bo Liu, Wenfeng Liu

引用次数: 0

Pathway enrichment analysis of distinct regions of the Iceman's stomach highlights heterogeneity of protein enrichment profiles. 对冰人胃不同区域的途径富集分析强调了蛋白质富集谱的异质性。

IF 21.1 1区综合性期刊

Science Bulletin Pub Date : 2026-04-16 DOI: 10.1016/j.scib.2026.04.038

Zenan Wu, Dan Ju, Tianxiang Liu, Huiyun Rao, Qiaomei Fu

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In situ SIMS Pb-Pb dating of aeschynite reveals Early Paleozoic Nb mineralization at Bayan Obo. 巴彦敖包早古生代铌成矿作用的斑长岩原位Pb-Pb定年研究。

IF 21.1 1区综合性期刊

Science Bulletin Pub Date : 2026-04-16 DOI: 10.1016/j.scib.2026.04.037

Bo Yang, Li Yang, Zhao Yan, Qing Sun, Yu Liu, Xiao-Xiao Ling, Xin-Yu Hou, Yong-Gang Zhao, Guo-Ying Yan, Jian-Yong Liu, Xian-Hua Li

{"title":"In situ SIMS Pb-Pb dating of aeschynite reveals Early Paleozoic Nb mineralization at Bayan Obo.","authors":"Bo Yang, Li Yang, Zhao Yan, Qing Sun, Yu Liu, Xiao-Xiao Ling, Xin-Yu Hou, Yong-Gang Zhao, Guo-Ying Yan, Jian-Yong Liu, Xian-Hua Li","doi":"10.1016/j.scib.2026.04.037","DOIUrl":"https://doi.org/10.1016/j.scib.2026.04.037","url":null,"abstract":"<p><p>Niobium (Nb) is a strategically critical metal with geographically concentrated global reserves that are hosted mainly in carbonatite-related deposits. The Bayan Obo deposit in northern China is the world's largest rare earth element (REE) resource, and also represents one of the most significant global Nb reserves. However, the timing and origin of Nb mineralization are still poorly constrained due to the complex multi-stage geological evolution (>1 Gyr) and diversity of Nb minerals in the deposit. Here we present the first detailed in situ SIMS Pb-Pb isotopic dating study of aeschynite, which is the dominant Nb mineral among more than 30 Nb minerals and accounts for >30% of the Nb resource in the Main and East orebodies of the Bayan Obo deposit. Eleven of the 12 samples of various ore types and orebodies yielded consistent Early Paleozoic ages between 402 ± 43 and 449 ± 56 Ma (weighted mean = 429 ± 11 Ma), indicating a regionally widespread Nb mineralization event. Integration of these new aeschynite ages with petrographic observations and previously published geochronological data demonstrates that Nb mineralization in the Main and East orebodies at Bayan Obo was controlled mainly by Early Paleozoic carbonatite-derived hydrothermal fluids. The remaining aeschynite sample yielded an age of 291 ± 55 Ma, which is interpreted to record isotopic resetting related to Permian granitic plutonism rather than a distinct mineralization event.</p>","PeriodicalId":421,"journal":{"name":"Science Bulletin","volume":" ","pages":""},"PeriodicalIF":21.1,"publicationDate":"2026-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147809594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Giant anomalous Hall and Nernst effects in a heavy fermion ferromagnet. 重费米子铁磁体中的巨异常霍尔和能司特效应。

IF 21.1 1区综合性期刊

Science Bulletin Pub Date : 2026-04-16 DOI: 10.1016/j.scib.2026.04.027

Longfei Li, Shuyue Guan, Shengwei Chi, Jianzhou Zhao, Jiawei Li, Xinxuan Lin, Gang Xu, Shuang Jia

{"title":"Giant anomalous Hall and Nernst effects in a heavy fermion ferromagnet.","authors":"Longfei Li, Shuyue Guan, Shengwei Chi, Jianzhou Zhao, Jiawei Li, Xinxuan Lin, Gang Xu, Shuang Jia","doi":"10.1016/j.scib.2026.04.027","DOIUrl":"https://doi.org/10.1016/j.scib.2026.04.027","url":null,"abstract":"<p><p>The anomalous Hall and Nernst effects refer to the perpendicular voltage drop generated by a magnetic material's magnetization in response to an applied current and temperature gradient. These effects can be harnessed to determine the Berry curvature and hold potential for future applications in electronic devices and thermoelectric energy conversion. We investigate the anomalous Hall and Nernst effects in the heavy-fermion ferromagnet CeCrGe<sub>3</sub> and its non-4f analog ferromagnet LaCrGe<sub>3</sub>. We find that CeCrGe<sub>3</sub> exhibits a giant anomalous Hall angle and an anomalous Nernst coefficient, reaching values as high as 33% and ∼10μVK<sup>-1</sup>, respectively, among the largest reported for topological magnets. Based on electronic band-structure calculations, we identify a series of topological flat bands carrying strong Berry curvature with a pronounced Ce 4f orbital character in CeCrGe<sub>3</sub>, which are absent in LaCrGe<sub>3</sub>, highlighting the crucial role of Kondo flat bands in generating large anomalous transport responses. Furthermore, we identify a breakdown of the anomalous Hall scaling relation and the nonlinear anomalous Mott relation, which we attribute to the breaking of the topological Kondo flat bands at finite temperatures.</p>","PeriodicalId":421,"journal":{"name":"Science Bulletin","volume":" ","pages":""},"PeriodicalIF":21.1,"publicationDate":"2026-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147809552","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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The crucial role of ground ice in slowing permafrost degradation 地面冰在减缓永久冻土退化中的关键作用。

IF 21.1 1区综合性期刊

Science Bulletin Pub Date : 2026-04-15 Epub Date: 2025-11-24 DOI: 10.1016/j.scib.2025.11.042

Guojie Hu , Zhe Sun , Lin Zhao , Deliang Chen , Defu Zou , Chien-Lu Ping , Wenxin Zhang , Yao Xiao , Guangyue Liu , Ren Li , Xiaodong Wu , Yifan Wu , Guodong Cheng

引用次数: 0

Near-surface ground ice map of the Northern Hemisphere 北半球近地面冰图。

IF 21.1 1区综合性期刊

Science Bulletin Pub Date : 2026-04-15 Epub Date: 2026-02-16 DOI: 10.1016/j.scib.2026.02.028

Bingquan Wang , Youhua Ran , Xin Li , Jan Hjort , Olli Karjalainen , Qingbai Wu , Yu Sheng , Huijun Jin , Defu Zou , Lin Zhao , Rui Ma , Ziyong Sun , Guodong Cheng

{"title":"Near-surface ground ice map of the Northern Hemisphere","authors":"Bingquan Wang , Youhua Ran , Xin Li , Jan Hjort , Olli Karjalainen , Qingbai Wu , Yu Sheng , Huijun Jin , Defu Zou , Lin Zhao , Rui Ma , Ziyong Sun , Guodong Cheng","doi":"10.1016/j.scib.2026.02.028","DOIUrl":"10.1016/j.scib.2026.02.028","url":null,"abstract":"<div><div>The functioning and vulnerability of permafrost are largely determined by near-surface ground ice content. However, high-quality, grid-based ground ice maps for the Northern Hemisphere are currently unavailable. This study presents the first 1-km resolution grid-based ground ice map within 5 m below the permafrost table across the Northern Hemisphere. The map integrates an unprecedented amount (1178 boreholes) of field measurement for volumetric ice content (VIC) and multisource geospatial data, especially paleoclimate, remote sensing data, and surficial geology units, using Copula-Embedded Bayesian Model Averaging (COP-BMA) techniques with multiple machine learning models and 200 ensemble simulations. The validation indicates relatively low errors (<em>R</em><sup>2</sup> = 0.86, RMSE = 7.08%VIC, bias = 0.02%VIC), while the uncertainty, represented by the 95% prediction interval (PI), is 16.08% ± 3.55%VIC. The map indicates that the total ice storage of near‐surface permafrost across the Northern Hemisphere is approximately 54,600 km<sup>3</sup> (47,800–62,300 km<sup>3</sup>), about twice the value from the International Permafrost Association map. This difference may be due to, but is not limited to, advancements in mapping techniques, the integration of additional measurement data, and improved spatial resolution. High VIC (>80%) is predominantly concentrated in low-lying plains, wetlands, and marshes. In contrast, mountainous regions, including the Qinghai–Xizang Plateau and Mongolian Plateau, exhibit lower VIC, typically ranging from 20% to 40%. The new ground ice map exhibits a spatial pattern that is largely consistent with previous maps while providing enhanced spatial detail. This high-resolution map serves as a benchmark for tracing permafrost changes and assessing impacts on climate, hydrology, ecosystems, and infrastructure in permafrost regions.</div></div>","PeriodicalId":421,"journal":{"name":"Science Bulletin","volume":"71 7","pages":"Pages 1786-1797"},"PeriodicalIF":21.1,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147321159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Gradient fluorination strategy to screen asymmetric ether for high-voltage and low-temperature lithium metal batteries 高压低温锂金属电池中不对称醚的梯度氟化筛选策略

IF 21.1 1区综合性期刊

Science Bulletin Pub Date : 2026-04-15 Epub Date: 2026-02-09 DOI: 10.1016/j.scib.2026.02.014

Junkai Shi , Rui Qiu , Zehang Peng , Ye Xiao , Liting Chen , Yuanzhu Zhong , Chao Xu , Yuepeng Cai , Fujun Li , Qifeng Zheng , Kui Ding

{"title":"Gradient fluorination strategy to screen asymmetric ether for high-voltage and low-temperature lithium metal batteries","authors":"Junkai Shi , Rui Qiu , Zehang Peng , Ye Xiao , Liting Chen , Yuanzhu Zhong , Chao Xu , Yuepeng Cai , Fujun Li , Qifeng Zheng , Kui Ding","doi":"10.1016/j.scib.2026.02.014","DOIUrl":"10.1016/j.scib.2026.02.014","url":null,"abstract":"<div><div>Fluorinated ethers have shown great potential as electrolyte solvent for lithium metal batteries (LMBs) due to their elevated oxidation stability and Li compatibility simultaneously. However, the influence of fluorination degree on electrolyte solvation and interfacial evolution has not been well clarified. Herein, we design and synthesize a family of asymmetric fluorinated 1,2-dimethoxymethane (FnDMM) as electrolyte solvent based on a gradient fluorination strategy, where the correlation of electrolyte solvation, ion transport, stability, interphase, and battery performance was systematically investigated. The combined experimental and theoretical studies reveal that the –CF<sub>2</sub>CF<sub>2</sub>H group in F4DMM solvent intensifies the H–F interaction that increases the viscosity and hinders ion migration. Meanwhile, the F3DMM with –CH<sub>2</sub>CF<sub>3</sub> group exhibits insufficient oxidation stability while F7DMM with –CF<sub>2</sub>CF<sub>2</sub>CF<sub>3</sub> group suffers from poor salt solubility. In sharp contrast, the –CF<sub>2</sub>CF<sub>3</sub> group in F5DMM solvent induces amphiphilic charge delocalization, which bestows efficient ion transport, robust interphase, and superior stability. Consequently, the F5DMM electrolyte not only bestows highly reversible Li plating/stripping Coulombic efficiency of 99.6% but also enables the stable cycling of Li||LiNi<sub>0.8</sub>Mn<sub>0.1</sub>Co<sub>0.1</sub>O<sub>2</sub> cell for 650 cycles at room temperature and 300 cycles at −40 °C.</div></div>","PeriodicalId":421,"journal":{"name":"Science Bulletin","volume":"71 7","pages":"Pages 1723-1733"},"PeriodicalIF":21.1,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147363860","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Micropillar-patterned electrodes to enhance mass transfer in low Pt-loaded fuel cells 微柱型电极在低铂负载燃料电池中增强传质。

IF 21.1 1区综合性期刊

Science Bulletin Pub Date : 2026-04-15 Epub Date: 2026-02-13 DOI: 10.1016/j.scib.2026.02.020

Yuan Wang , Linhao Fan , Yongkang Luan , Qing Du , Yalin Zhang , Xing Li , Meng Ni , Fang Liu , Zhongjun Hou , Kui Jiao

{"title":"Micropillar-patterned electrodes to enhance mass transfer in low Pt-loaded fuel cells","authors":"Yuan Wang , Linhao Fan , Yongkang Luan , Qing Du , Yalin Zhang , Xing Li , Meng Ni , Fang Liu , Zhongjun Hou , Kui Jiao","doi":"10.1016/j.scib.2026.02.020","DOIUrl":"10.1016/j.scib.2026.02.020","url":null,"abstract":"<div><div>The practical application of fuel cell vehicles is hindered by poor performance and durability of proton exchange membrane fuel cells (PEMFCs), especially at low Pt loading and low relative humidity conditions, owing to limited proton transport properties and electrochemical reaction surface areas of conventional electrode design. This study proposes a patterned design with ordered ionomer micropillars as an alternative electrode structure to enhance the performance and durability of PEMFCs with low Pt loading (0.1 mg cm<sup>−2</sup>) across a wide range of humidities. Compared to conventional electrodes, the patterned electrodes achieved up to 29% peak power density improvement under low-humidity (50% relative humidity) conditions. Pore-scale multiphysics modeling demonstrated that the ionomer micropillars inside the patterned electrodes transform the distorted transport pathways of conventional, randomly distributed catalyst layers into ordered, short-range channels for rapid oxygen and proton delivery, which significantly enhances the oxygen reduction reaction rate. Moreover, the patterned electrodes exhibited improved durability, showing lower performance loss compared to conventional electrodes after accelerated stress testing across a wide range of humidities. Strategic redesign of the ionomer micropillars demonstrated that the H1.8W0.38 electrode (with a micropillar height of 1.8 μm and width of 0.38 μm), with its increased penetration depth and appropriately adjusted width, achieves optimal performance by minimizing oxygen and proton transport resistances by 6% and 14%, respectively, compared to the pre-optimization (H1.5W0.38) electrode, under low-humidity (50% relative humidity) conditions. The proposed patterned electrode architecture offers a promising approach for advancing the development of high-performance, cost-effective, and durable fuel cells.</div></div>","PeriodicalId":421,"journal":{"name":"Science Bulletin","volume":"71 7","pages":"Pages 1703-1713"},"PeriodicalIF":21.1,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147363837","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Immunogenicity and safety of an Escherichia coli-produced 9-valent HPV vaccine in adolescents aged 9 to 17 compared with young women 大肠杆菌生产的9价HPV疫苗在9至17岁青少年与年轻女性中的免疫原性和安全性比较

IF 21.1 1区综合性期刊

Science Bulletin Pub Date : 2026-04-15 Epub Date: 2026-02-26 DOI: 10.1016/j.scib.2026.02.035

Yulin Jing , Xiaowen Hu , Li Zhang , Jiangyahui Wang , Fei Yang , Rong Wang , Ying Jiang , Lingling Nie , Zhongqiang Jin , Xuecheng Liu , Sihai Li , Chao Du , Pengjuan Wang , Kun Li , Qi Chen , Shoujie Huang , Zhaofeng Bi , Qiufen Zhang , Weijin Huang , Yingying Su , Ningshao Xia

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A highly unexpected birth-mass function of neutron stars 中子星的一个非常出乎意料的诞生-质量函数。

IF 21.1 1区综合性期刊

Science Bulletin Pub Date : 2026-04-15 Epub Date: 2026-03-03 DOI: 10.1016/j.scib.2026.03.007

Zi-Gao Dai

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