2025

最新文章

• Roughness- dependent scaling of the contact area and separation gap with pressure for glassy polymers AI翻译
  作者：Patil, Utkarsh; Kumar, Shubhendu; Merriman, Stephen; Dhinojwala, Ali
  作者单位：University System of Ohio; University of Akron
  摘要：The contact between two rough surfaces has been a topic of significant interest since early studies on Coulombic friction and remains crucial for numerous technological applications. However, theoretical progress has outpaced experiments due to the challenges in measuring contact areas across scales ranging from subnanometers to macroscopic dimensions. Here, we demonstrate the use of commonly available infrared-based (IR) spectroscopy in combination with finite-difference time-domain (FDTD) op...
• Photothermal catalysis of waste plastics into propionic acid and hydrogen via Ni single- atom site isolation effect AI翻译
  作者：Yue, Shuai; Liu, Yixiao; Zhao, Zhiyong; Zhao, Guanshu; Yang, Mengxue; Zhang, Tao; Li, Fei; Liu, Kewang; Wang, Pengfei; Zhan, Sihui; Jia, Jinhu
  作者单位：Nankai University; University of Toronto; Tianjin University
  摘要：Currently, catalytic recycling of polyethylene (PE) into high-value chemicals using solar energy often faces poor product selectivity and low efficiency. This is mainly due to the difficulty in effectively controlling the intermediates during PE photoreforming and the long-standing challenge of inefficient charge dynamics. Here, we present a solar-driven photothermal catalytic approach for the selective conversion of PE waste into propionic acid and hydrogen under ambient conditions. Atomicall...
• Measurement of the dynamic charge susceptibility near the charge density wave transition in ErTe3 AI翻译
  作者：Chaudhuri, Dipanjan; Jiang, Qianni; Guo, Xuefei; Chen, Jin; Kengle, Caitlin S.; Hoveyda-Marashi, Farzaneh; Bernal-Choban, Camille; de Vries, Niels; Chiang, Tai-Chang; Fradkin, Eduardo; Fisher, Ian R.; Abbamonte, Peter
  作者单位：University of Illinois System; University of Illinois Urbana-Champaign; University of Illinois System; University of Illinois Urbana-Champaign; Stanford University; University of Illinois System; University of Illinois Urbana-Champaign
  摘要：A charge density wave (CDW) is a phase of matter characterized by a periodic modulation of valence electron density coupled with lattice distortion. Its formation is closely tied to the dynamical charge susceptibility, x(q, 0)), which reflects the collective electron dynamics of the material. Despite decades of study, x(q, 0)) near a CDW transition has never been measured at nonzero momentum, q, with meV energy resolution. Here, we investigate the canonical CDW transition in ErTe3 using moment...
• Measuring premature and cumulative family member bereavement: Racial disparities and later mortality risk AI翻译
  作者：Chang, Michelle; Robles, Theodore F.
  作者单位：University of California System; University of California Los Angeles
  摘要：Though racial disparities in shortened life expectancy have been well established, racial disparities in the burden of bereavement after such premature deaths are severely understudied. This is, in part, due to a lack of measurement tools for characterizing lifetime exposure to loss. We propose three indices that simultaneously quantify premature and cumulative lifetime loss-two typically unmeasured dimensions of loss. Using a longitudinal US sample of 27,985 participants from the Health and R...
• Bias-aware training and evaluation of link prediction algorithms in network biology AI翻译
  作者：Yilmaz, Serhan; Yorgancioglu, Kaan; Koyuturk, Mehmet
  作者单位：University System of Ohio; Case Western Reserve University
  摘要：For biomedical applications, new link prediction algorithms are continuously being developed. These algorithms are typically evaluated computationally, using test sets generated by sampling the edges uniformly at random. However, as we demonstrate, this evaluation approach introduces a bias toward rich nodes, i.e., those with higher degrees in the network. More concerningly, this bias persists even when different network snapshots are used for evaluation, as recommended in the machine learning...
• A specific negatively charged sequence confers intramolecular regulation on Munc13-1 function in synaptic exocytosis AI翻译
  作者：Zhao, Kexu; Zhang, Li; Lei, Mengshi; Jin, Ziqi; Du, Tianxin; Zhang, Hong; Sheng, Yin; Hu, Zhitao; Wang, Shen; Ma, Cong
  作者单位：Huazhong University of Science & Technology; Zhengzhou University; Huazhong University of Science & Technology; City University of Hong Kong; Huazhong University of Science & Technology; Huazhong University of Science & Technology; Guangzhou Medical University
  摘要：Munc13 family proteins are crucial for the secretion of neurotransmitters and hormones necessary for cell communication. They share a conserved C-terminal region that includes C2 and the MUN domains, which facilitate membrane interactions and the assembly of soluble N-ethylmaleimide sensitive factor attachment protein receptor (SNARE) complexes. Neuronal isoforms of Munc13 possess a variable N-terminal region that is essential for neurotransmitter release and short-term plasticity, although th...
• Humanized mice to model rare human diseases AI翻译
  作者：Suva, Larry J.
  作者单位：Texas A&M University System; Texas A&M University College Station
• An endosymbiotic origin of the crimson pigment from the lac insect AI翻译
  作者：Vaishally; Pal, Sourajyoti; Thyagarajan, Kedhar R.; Shukla, Shantanu P.
  作者单位：Indian Institute of Science (IISC) - Bangalore; Indian Institute of Science (IISC) - Bangalore
  摘要：Symbioses with microorganisms expand the genetic and metabolic repertoire of many insects. The lac insect Kerria lacca (Hemiptera: Sternorrhyncha) is a phloem-feeding scale insect that is brightly colored due to the presence of natural polyhydroxy-anthraquinone pigments called laccaic acids. The deep red pigments possibly provide defense against pathogens and predators and are commercially important as dyes in textiles, lacquerware, and cosmetics. Laccaic acids are categorized as polyketides c...
• Multiple sources of atmospheric CO2 activated by AMOC recovery at the onset of interglacial MIS 9 AI翻译
  作者：Krauss, Florian; Baggenstos, Daniel; Schmitt, Jochen; Tuzson, Bela; Menking, James A.; Machler, Lars; Silva, Lucas; Grimmer, Markus; Capron, Emilie; Stocker, Thomas F.; Bauska, Thomas K.; Fischer, Hubertus
  作者单位：University of Bern; University of Bern; Australian Antarctic Division; University of Tasmania; Swiss Federal Institutes of Technology Domain; Swiss Federal Laboratories for Materials Science & Technology (EMPA); Commonwealth Scientific & Industrial Research Organisation (CSIRO); INRAE; Communaute Universite Grenoble Alpes; Universite Grenoble Alpes (UGA); Institut de Recherche pour le Developpement (IRD); UK Research & Innovation (UKRI); Natural Environment Research Council (NERC); NERC British Antarctic Survey
  摘要：Using high-precision ice core measurements of CO2, S13C-CO2, CH4, and N2O, this study provides carbon isotope constraints on a sizeable, centennial-scale CO2 jump at the onset of Marine Isotope Stage 9 (MIS 9). The very end of the Heinrich stadial (HS) characterizing Termination IV (T-IV, ca. 343 to 333 ka ago) shows a 250-y-long jump in greenhouse gas concentrations, followed by a 1.3 ka gradual decline back to the initial concentration. During this so-called overshoot, CO2 and CH4 reach thei...
• Control of seed- to- seedling transition by an upstream open reading frame in ABSCISIC ACID DEFICIENT2 AI翻译
  作者：Wang, Zhen; Zhang, Xiaofan; Zhou, Can; Cao, Xiaofeng
  作者单位：Chinese Academy of Sciences; Institute of Genetics & Developmental Biology, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS
  摘要：The start of seed germination is a major decision point in plant life cycle, which relies on seed stored mRNA. However, the underlying translational mechanism remains less illustrated. Here, we demonstrate that inhibiting translation using translation inhibitors and ribosome-defective mutants delays germination inArabidopsis. Through comprehensive transcriptome deep sequencing (RNA-seq) and polysome profiling analyses, we elucidated the dynamic interplay of regulation at the transcriptional an...