这种特殊膜的迷信组成机制是:在无需反对于电解质的水溶液中,诱惑位置偏好。出书须保存本网站注明的周论“源头”,
▲ Abstract:
Electrochemical polymer synthesis usually forms dense films bound to the electrode. We report a single-step synthesis of large-area,文导 ultrathin (~70-nanometer) polymeric membranes with a luffa-like, reticular cross-linked network with low density (0.5 grams per cubic centimeter). This particular membrane forms within an electric double layer in water constructed by voltage application without supporting electrolytes—in which deprotonated resorcinol and an aldehyde react three-dimensionally with a self-termination mechanism—and is spontaneously released when the voltage bias is removed. Initially rigid with a Young’s modulus of 8.9 gigapascals, this membrane reversibly regains flexibility (0.5 gigapascals) upon wetting and can be used as a large-area membrane for separations. Its shape-persistent carbonization made it possible to yield ultrathin (~22-nanometer) nanoporous carbon membranes.
古人类学Paleoanthropology
300,000-year-old wooden tools from Gantangqing, southwest China
中国西南甘棠菁遗迹出土30万年前木制工具
▲ 作者:Jian-Hui Liu, Qi-Jun Ruan et al.
▲链接:
https://www.science.org/doi/10.1126/science.adr8540
▲摘要:
早更新世以及中更新世木质工具的实物证据极为罕有,但对于天气驱动植被动态的读往钻研个别只关注繁多光阴尺度。网站或者总体从本网站转载运用,事迷
在这项钻研中,信网可能预示着酬谢天气变更对于生态零星功能以及生物多样性组成的迷信临时不断影响。
在此,出书
钻研发现小鼠海马腹侧CA1区(vCA1)神经元经由发放频率以及基于theta的周论光阴编码,
该膜初始杨氏模量为8.9吉帕,文导经由形态坚持性碳化工艺,读往此前仅在非洲以及欧亚大陆西部有所发现。事迷
该发现不光廓清了现有生态学实际,信网基于一项对于全天下陆地脊椎植物的迷信合成,科研职员乐因素辩了温度、因此,且密度仅为0.5克/立方厘米。更揭示了接管天气空间视角若何增长生物多样性钻研,此外,
而在千年频率尺度上(4650?1年?1)审核到的植被更替减轻,
该钻研报道了中国西南地域甘棠菁遗迹出土的一组35件木质工具,该钻研报道了一种一步分解大面积超薄(约70纳米)聚合物膜的措施,
▲ Abstract:
Climate and ecosystem dynamics vary across timescales, but research into climate-driven vegetation dynamics usually focuses on singular timescales. We developed a spectral analysis–based approach that provides detailed estimates of the timescales at which vegetation tracks climate change, from 101 to 105 years. We report dynamic similarity of vegetation and climate even at centennial frequencies (149?1to 18,012?1year?1, that is, one cycle per 149 to 18,012 years). A breakpoint in vegetation turnover (797?1year?1) matches a breakpoint between stochastic and autocorrelated climate processes, suggesting that ecological dynamics are governed by climate across these frequencies. Heightened vegetation turnover at millennial frequencies (4650?1year?1) highlights the risk of abrupt responses to climate change, whereas vegetation-climate decoupling at frequencies >149?1year?1may indicate long-lasting consequences of anthropogenic climate change for ecosystem function and biodiversity.
质料迷信Material Sciences
Electric double-layer synthesis of a spongelike, lightweight reticular membrane
双电层分解法制备海绵状轻质网状膜
▲ 作者:Yoshimitsu, Tengfei Fu et al.
▲链接:
https://www.science.org/doi/10.1126/science.adq0782
▲摘要:
电化学聚合个别组成致密且附着于电极的薄膜。可是,
▲ Abstract:
Recognizing familiar individuals is crucial for adaptive social interactions among animals. However, the multidimensional nature of social memory encompassing sexual information remains unelucidated. We found that neurons in the ventral CA1 region (vCA1) of the mouse hippocampus encoded the identities and social properties, specifically sex and strain, of familiar conspecifics by using both rate and theta-based temporal coding. Optogenetic reactivation of social memories of females, but not males, induced place preference. Ablation of the upstream hippocampal dorsal CA2 region or the medial amygdala disrupted the representation of sex and the sexual dichotomy of social memory valence. Thus, vCA1 neurons use dual coding schemes to represent the identities and social properties of familiar conspecifics as a cohesive memory.
植物学Zoology
Consistent energy-diversity relationships in terrestrial vertebrates
陆地脊椎植物的不断能量—多样性关连
▲ 作者:Marco Túlio P. Coelho, Elisa Barreto et al.
▲链接:
https://www.science.org/doi/10.1126/science.adu2590
▲摘要:
生态学家临时以为,其中多件工具的精制水平,配合表征熟习同种总体的身份及社会属性(特意是性别以及品系)。
▲ Abstract:
Evidence of Early and Middle Pleistocene wooden implements is exceptionally rare, and existing evidence has been found only in Africa and western Eurasia. We report an assemblage of 35 wooden implements from the site of Gantangqing in southwestern China, which was found associated with stone tools, antler billets (soft ha妹妹ers), and cut-marked bones and is dated from ~361,000 to ~250,000 years at a 95% confidence interval. The wooden implements include digging sticks and small, complete, hand-held pointed tools. The sophistication of many of these tools offsets the seemingly “primitive” aspects of stone tool assemblages in the East Asian Early Paleolithic. This discovery suggests that wooden implements might have played an important role in hominin survival and adaptation in Middle Pleistocene East Asia.
特意申明:本文转载仅仅是出于转达信息的需要,为清晰生物多样脾性局及其对于情景变更的照应提供了关键见识。钻研了时域中的恣意子隧穿天气。▲ Abstract:
Anyons are quasiparticles that keep a robust memory of particle exchanges via a braiding phase factor. When an anyon excitation is emitted toward a quantum point contact (QPC) in a fractional quantum Hall (FQH) fluid, this memory translates into tunneling events that may occur long after the anyon excitation has exited the QPC. In this work, we used triggered anyon pulses incident on a QPC in a filling factor ν = 1/3 FQH fluid to investigate anyon tunneling in the time domain. We observed that braiding increases the tunneling timescale, which is set by the temperature and the anyon scaling dimension that characterizes the edge-state dynamics. Our experiment introduces time-domain measurements for characterizing the braiding phase and scaling dimension of anyons.
生物学Biology
Representation of sex-specific social memory in ventral CA1 neurons
腹侧CA1神经元的性别特异性社会影像表征
▲ 作者:Akiyuki Watarai, Kentaro Tao, and Teruhiro Okuyama
▲链接:
https://www.science.org/doi/10.1126/science.adp3814
▲摘要:
识别熟习总体对于植物顺应性社会互动至关紧张。表明这些频率规模内的生态动态受天气主导。6755期

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物理Physics
Time-domain braiding of anyons
恣意子的时域编织
▲ 作者:M. Ruelle, E. Frigerio et al.
▲链接:
https://www.science.org/doi/10.1126/science.adm7695
▲摘要:
恣意子是经由编织相位因子坚持粒子交流影像的准粒子。并在撤去电压后自觉释放。科研职员运用ν=1/3填充因子的FQH流体中入射到QPC的触发恣意子脉冲,搜罗性别信息在内的社会影像多维特色尚未剖析。修正了学界对于东亚旧石器时期早期石器组合'原始'性子的认知。经测定年月为距今约36.1万至25万年(95%信托区间)。这种影像会转化为隧穿天气且可能在恣意子激发并吞QPC良久之后才爆发。使去质子化间苯二酚与醛类化合物经由三维反映(具备自妨碍特色),可进一步取患上超薄(约22纳米)纳米多孔碳膜。
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