检索结果-南通市图书馆

Microsystems & Nanoengineering 2022年第2期8卷 59-71页

作者： Claude Meffan julian Menges Fabian Dolamore daniel Mak Conan Fee Renwick C.j.Dobson Volker Nock Department of Electrical and Computer Engineering University of CanterburyChristchurch 8041New Zealand Department of Microengineering Kyoto University615-8540 KyotoJapan School of Biological Sciences University of CanterburyChristchurch 8041New Zealand Biomolecular Interaction Centre School of Biological SciencesUniversity of CanterburyChristchurch 8041New Zealand School of Product Design University of CanterburyChristchurch 8041New Zealand Department of Biochemistry and Molecular Biology Bio21 Molecular Science and Biotechnology InstituteUniversity of MelbourneParkvilleVIC 3010Australia The MacDiarmid Institute for Advanced Materials and Nanotechnology Wellington 6140New Zealand

Controlling fluid flow in capillaric circuits is a key requirement to increase their uptake for assay *** action off-valves provide such functionality by pushing an occluding bubble into the channel using a difference in capillary ***,we utilized the binary switching mode of this structure to develop a powerful set of fundamental fluidic valving *** this work,we study the transistor-like qualities of the off-valve and provide evidence that these structures are in fact functionally complementary to electronic junction field effect *** view of this,we propose the new term capillaric field effect transistor to describe these types of *** support this conclusion,we present a theoretical description,experimental characterization,and practical application of analog flow resistance *** addition,we demonstrate that the valves can also be *** show modulation of the flow resistance from fully open to pinch-off,determine the flow rate-trigger channel volume relationship and demonstrate that the latter can be modeled using Shockley's equation for electronic ***,we provide a first example of how the valves can be opened and closed repeatedly.

关键词： transistors effect field

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Predicting the synthesizability of crystalline inorganic materials from the data of known material compositions

引用

npj Computational Materials 2023年第1期9卷 733-743页

作者： Evan R.Antoniuk Gowoon Cheon George Wang daniel Bernstein William Cai Evan j.Reed Materials Science Division Physical and Life Sciences DirectorateLawrence Livermore National LaboratoryLivermoreCAUSA Department of Chemistry Stanford UniversityStanfordCAUSA Department of Applied Physics Stanford UniversityStanfordCAUSA Google Research Mountain ViewCAUSA Department of Physics Stanford UniversityStanfordCAUSA Department of Mathematics Stanford UniversityStanfordCAUSA Department of Computer Science Stanford UniversityStanfordCAUSA Department of Materials Science and Engineering Stanford UniversityStanfordCAUSA

Reliably identifying synthesizable inorganic crystalline materials is an unsolved challenge required for realizing autonomous materials *** this work,we develop a deep learning synthesizability model(SynthNN)that leverages the entire space of synthesized inorganic chemical *** reformulating material discovery as a synthesizability classification task,SynthNN identifies synthesizable materials with 7×higher precision than with DFT-calculated formation *** a head-to-head material discovery comparison against 20 expert material scientists,SynthNN outperforms all experts,achieves 1.5×higher precision and completes the task five orders of magnitude faster than the best human ***,without any prior chemical knowledge,our experiments indicate that SynthNN learns the chemical principles of charge-balancing,chemical family relationships and ionicity,and utilizes these principles to generate synthesizability *** development of SynthNN will allow for synthesizability constraints to be seamlessly integrated into computational material screening workflows to increase their reliability for identifying synthetically accessible materials.

关键词： inorganic crystalline utilize

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Polypeptide analysis for nanopore-based protein identification

引用

Nano Research 2022年第11期15卷 9831-9842页

作者： Mazdak Afshar Bakshloo Safia Yahiaoui Fabien Piguet Manuela Pastoriza-Gallego Régis daniel jérôme Mathé john j.Kasianowicz Abdelghani Oukhaled CY Cergy Paris Université CNRSLAMBE95000CergyFrance UniversitéParis-Saclay Univ EvryCNRSLAMBE91025Evry-CourcouronnesFrance University of South Florida Dept.of PhysicsTampaFL 33620USA Freiburg Institute for Advanced Studies Universität FreiburgFreiburg 79104Germany

Presently,proteins are identified by cleaving them with proteases,measuring the mass to charge ratio of the fragments with a mass spectrometer,and matching the fragments to segments within known proteins in *** earlier demonstrated that a nanometer-scale pore formed by aerolysin(AeL)can discriminate between,and therefore identify,three similar size proteins from their trypsin-cleaved polypeptide *** this nanopore-protease method,the protein’s identity is instead determined from characteristic ionic current blockade patterns caused by the polypeptide fragments that enter the *** results also suggested that not all of the theoretically expected cleavage products partition into the *** better understand the mechanism by which polypeptide fragments are captured,and how different polypeptides reduce the pore’s ionic current,we studied the effects of 11 identical length polypeptides with different net charges and charge *** show that under certain experimental conditions,negative,positive,and neutral polypeptides are driven into the AeL pore by the same applied voltage *** capture rate and dwell time of polypeptides in the pore depend strongly on the ionic strength,the magnitude of the applied voltage,and the net charge and charge distribution of the *** dwell time distribution depends nonmonotonically on the applied voltage(regardless of the polymer’s net charge),and its maximum value depends on the polypeptide net charge and charge *** maximum dwell time for different polypeptides does not occur at the same applied voltage amplitude,which conceivably might complicate the detection and discrimination of some polypeptide *** additional experiments,computer simulations,and artificial intelligence research are needed to better understand how to optimize the partitioning of enzymatically cleaved fragments into the AeL nanopore,the method is still capable of accurately identifying

关键词： protein identification nanopores trypsin enzymatic degradation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The effect of EMG magnitude on the masseter vestibular evoked myogenic potential(mVEMP)

引用

journal of Otology 2022年第4期17卷 203-210页

作者： daniel j.Romero Gary P.jacobson Richard A.Roberts Department of Hearing and Speech Sciences Division of Vestibular SciencesVanderbilt University Medical Center121521st Ave.South6308 Medical Center EastNashvilleTN37232-8718USA

Introduction:The masseter vestibular evoked myogenic potential(mVEMP)is a bilaterally generated,electromyographically(EMG)-mediated response innervated by the trigeminal *** purpose of the present investigation was to 1)determine whether subjects could accurately achieve and maintain a range of EMG target levels,2)to examine the effects of varied EMG levels on the latencies and amplitudes of the mVEMP,and 3)to investigate the degree of side-to-side asymmetry and any effects of EMG ***:Subjects were nine neurologically and otologically normal young adults.A high-intensity tone burst was presented monaurally while subjects were seated upright and asked to match a range of EMG target levels by clenching their *** were made from the ipsilateral and contralateral masseter muscles referenced to the ear being monaurally ***:We found that the tonic EMG target had no effect on mVEMP ***,although mVEMP amplitudes“scaled”to the EMG target,there was a tendency for the subjects’EMG level to“undershoot”the EMG target levels greater than 50 *** some individuals did generate differences in EMG activation between sides,there were no significant differences on average EMG activation between ***,while average corrected amplitude asymmetry was similar across EMG targets,some individuals demonstrated large,corrected amplitude asymmetry ***:The results of this investigation suggest that,as with cVEMP recordings,the underlying EMG activation may vary between subjects and could impact mVEMP amplitudes,yet could be mitigated by amplitude correction *** it is important to be aware that even young normal subjects have difficulty maintaining large,tonic EMG activity during the mVEMP recording.

关键词： Vestibular evoked myogenic potentials (VEMPs) Masseter VEMPs Electromyography(EMG) Vestibulomasseteric reflex(VMR) EMG target Level

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Soil water content and nitrogen differentially correlate with multidimensional leaf traits of two temperate broadleaf species

引用

Plant Diversity 2023年第6期45卷 694-701页

作者： Ming-Yue jin daniel j.johnson Guang-Ze jin Qing-Xi Guo Zhi-Li Liu Center for Ecological Research Key Laboratory of Sustainable ForestEcosystem Management-Ministry of EducationNortheast Asia Biodiversity Research CenterNortheast Forestry UniversityHarbin 150040HeilongjiangChina School of Forest Resources and Conservation University of FloridaGainesvilleFLUSA

The variation and correlation of leaf economics and vein traits are crucial for predicting plant ecological strategies under different environmental ***,correlations between these two suites of traits and abiotic factors such as soil water and nitrogen content remain *** measured leaf economics and vein traits as well as soil water and nitrogen content for two different shade-tolerant species(Betula platyphylla and Acer mono)in four mixed broadleaved-Korean pine(Pinus koraiensis)forests along a latitudinal gradient in Northeast *** found that leaf economics traits and vein traits were decoupled in shade-intolerant species,Betula platphylla,but significantly coupled in a shadetolerant species,*** found stronger correlations among leaf traits in the shade tolerant species than in the shade intolerant ***,leaf economic traits were positively correlated with the soil water gradient for both species,whereas vein traits were positively correlated with soil water gradient for the shade intolerant species but negatively correlated in the shade tolerant *** economic traits were positively correlated with soil nitrogen gradient in shade intolerant species but not correlated in shade tolerant species,vein traits were negatively correlated with soil nitrogen gradient in shade tolerant species but not correlated in shade intolerant *** study provides evidence for distinct correlations between leaf economics and vein traits and local abiotic factors of species differing in light *** recommend that the ecological significance of shade tolerance be considered for species when evaluating ecosystem functions and predicting plant responses to environmental changes.

关键词： Leaf trait multidimensionality Economics traits Vein traits Soil water content Soil total nitrogen Shade tolerance

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Mating system and genetic diversity of a rare desert legume Ammopiptanthus nanus (Leguminosae)

引用

journal of Systematics and Evolution 2009年第1期47卷 57-66页

作者： daniel j CRAWFORD Department of Ecology and Evolutionary Biology and the Natural History Museum and Biodiversity Research CenterThe University of Kansas

Ammopiptanthus nanus is an endangered evergreen shrub endemic to the deserts of central Asia and plays an important role in delaying further desertification. We examined allozyme variation and AFLP diversity in A. nanus populations and investigated the mating system of this species using progeny arrays assayed for poly-morphic allozyme loci. Mating system analysis in the Keyi’eryongke’er population showed low levels of out-crossing, and strong inbreeding depression. Low levels of genetic variation were detected at both population (allozyme, Pp=14.0%, A=1.14, He=0.031; AFLP, Pp=14.5%, Shannon’s information index I=0.063) and species (allozyme, Pp=21.1%, A=1.21, He=0.040; AFLP, Pp=20.9%, I=0.083) levels; while moderate genetic differentiation existed among populations, as indicated by allozymes (GST=0.081) and AFLP (GST=0.151-0.193). Founder effect, bottlenecks in evolutionary history, the mixed mating system and co-ancestry may have influenced the level of genetic diversity in A. nanus. Markers of both types provide new insights for conservation management, indicating that the Biao’ertuokuoyi and Keyi’eryongke’er populations should be given priority for in situ conservation and regarded as seed sources for ex situ conservation.

关键词： AFLP allozyme Ammopiptanthus conservation endangered plant genetic structure outcrossing rate

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Observation of a single protein by ultrafast X-ray diffraction

引用

Light(Science & Applications) 2024年第1期13卷 80-90页

作者： Tomas Ekeberg Dameli Assalauova johan Bielecki Rebecca Boll Benedikt j.Daurer Lutz A.Eichacker Linda E.Franken Davide E.Galli Luca Gelisio Lars Gumprecht Laura H.Gunn janos Hajdu Robert Hartmann Dirk Hasse Alexandr Ignatenko jayanath Koliyadu Olena Kulyk Ruslan Kurta Markus Kuster Wolfgang Lugmayr jannik Lübke Adrian P.Mancuso Tommaso Mazza Carl Nettelblad Yevheniy Ovcharenko daniel E.Rivas Max Rose Amit K.Samanta Philipp Schmidt Egor Sobolev Nicusor Timneanu Sergey Usenko daniel Westphal Tamme Wollweber Lena Worbs Paul Lourdu Xavier Hazem Yousef Kartik Ayyer Henry N.Chapman jonas A.Sellberg Carolin Seuring Ivan A.Vartanyants jochen Küpper Michael Meyer Filipe R.N.C.Maia Laboratory of Molecular Biophysics Department of Cell and Molecular BiologyUppsala UniversityHusargatan 3(Box 596)SE-75124 UppsalaSweden Deutsches Electronen-Synchrotron DESY Notkestrasse 8522607 HamburgGermany European XFEL Holzkoppel 422869 SchenefeldGermany Diamond Light Source Harwell Science&Innovation CampusDidcot OX110DEUK University of Stavanger Centre Organelle ResearchRichard-Johnsensgate 44021 StavangerNorway Leibniz Institute for Experimental Virology(HPI) Centre for Structural Systems BiologyNotkestraße 8522607 HamburgGermany Dipartimento di Fisica“Aldo Pontremoli” Universitàdegli Studi di Milanovia Celoria 1620133 MilanoItaly Center for Free-Electron Laser Science DESY22607 HamburgGermany Plant Biology Section School of Integrative Plant ScienceCornell UniversityIthacaNY 14853USA PNSensor GmbH Otto-Hahn-Ring 6D-81739 MünchenGermany Biomedical and X-Ray Physics Department of Applied PhysicsAlbaNova University CenterKTH Royal Institute of TechnologySE-10691 StockholmSweden ELI Beamlines/IoP Institute of Physics AS CR v.v.i.Na Slovance 218221 Prague 8Czech Republic Multi-User CryoEM Facility Centre for Structural Systems BiologyNotkestr.8522607 HamburgGermany University Medical Center Hamburg-Eppendorf(UKE) Martinistrasse 5220246 HamburgGermany The Hamburg Center for Ultrafast Imaging Universität HamburgLuruper Chaussee 14922761 HamburgGermany Department of Physics Universität HamburgLuruper Chaussee 14922761 HamburgGermany Department of Chemistry and Physics La Trobe Institute for Molecular ScienceLa Trobe UniversityMelbourneVIC 3086Australia Division of Scientific Computing Science for Life LaboratoryDepartment of Information TechnologyUppsala UniversityBox 337SE-75105 UppsalaSweden European Molecular Biology Laboratory c/o DESYNotkestrasse 8522607 HamburgGermany Department of Physics and Astronomy Uppsala UniversityBox 516SE-75120 UppsalaSweden Max Planck Institute for the Structure and Dynamics of Matter Luruper Chaussee 14922761 HamburgGe

The idea of using ultrashort X-ray pulses to obtain images of single proteins frozen in time has fascinated and inspired *** was one of the arguments for building X-ray free-electron *** to theory,the extremely intense pulses provide sufficient signal to dispense with using crystals as an amplifier,and the ultrashort pulse duration permits capturing the diffraction data before the sample inevitably *** was first demonstrated on biological samples a decade ago on the giant *** then,a large collaboration has been pushing the limit of the smallest sample that can be *** ability to capture snapshots on the timescale of atomic vibrations,while keeping the sample at room temperature,may allow probing the entire conformational phase space of *** we show the first observation of an X-ray diffraction pattern from a single protein,that of Escherichia coli GroEL which at 14 nm in diameter is the smallest biological sample ever imaged by X-rays,and demonstrate that the concept of diffraction before destruction extends to single *** the pattern,it is possible to determine the approximate orientation of the *** experiment demonstrates the feasibility of ultrafast imaging of single proteins,opening the way to single-molecule time-resolved studies on the femtosecond timescale.

关键词： smallest intense ultrafast

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Towards a business model for second-life batteries: Barriers,opportunities, uncertainties, and technologies

引用

journal of Energy Chemistry 2023年第3期78卷 507-525,I0014页

作者： Carlos Antônio Rufino júnior Eleonora Riva Sanseverino Pierluigi Gallo daniel Koch Yash Kotak Hans-Georg Schweiger Hudson Zanin Advanced Energy Storage Division New Energy Innovation CenterUniversity of Campinas(UNICAMP)Campinas 13083-852Brazil Engineering Department University of Palermo(UNIPA)Palermo 90128Italy Consorzio Nazionale Interuniversitario per le Telecomunicazioni(CNIT) Parma 43124Italy Technische Hochschule Ingolstadt Institute for ElectricConnected and Safe Mobility(C-ECOS)Ingolstadt 85049Germany

Electric vehicles(EVs) and the recent pandemic outbreak give cities a new trend to primarily private and shared mobility with low noise and less air *** factors for the widespread of EVs are the electrical charging infrastructure,driving range,and the reduction of the cost of battery *** this reason,there is a massive effort from manufacturers,governments,and the scientific community to reduce battery costs and boost sustainable electrical production and *** reuse is an alternative to reduce batteries’ costs and environmental ***-life batteries can be used in a wide variety of secondary ***-life batteries can be connected with off-grid or on-grid photovoltaic and wind systems,vehicle charging stations,forklifts,and frequency *** present work aims to analyze the main challenges imposed on the reuse of batteries,the leading technologies for their reuse,and the different types of batteries in terms of their feasibility for second-life *** main novelty of this work is the discussion about the barriers,opportunities,uncertainties,and technologies for the second life *** we summarize the present state of the art in reusing lithium-ion batteries discussing technical and economic feasibility,environmental impacts,and *** results show five business models that have been proposed in the literature,three types of markets for trading second-life batteries,and the main opportunities and barriers for each actor in the battery supply chain.

关键词： Business models Batteries Sustainability Electric vehicles Challenges Opportunities Lithium-ion batteries Reuse

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Balancing nutrients in a toxic environment: the challenge of eating

引用

Insect Science 2022年第1期29卷 289-303页

作者： Peng Wang daniel G.Vassão Bettina Raguschke Michael j.Furlong Myron P.Zalucki School of Biological Sciences The University of QueenslandSt LuciaQueenslandAustralia Department of Biochemistry Max Planck Institute for Chemical EcologyJenaGermany

Insect herbivores can regulate their food intake by mixing food sources with different nutrient content, but face the resulting challenge of ingesting various plant secondary metabolites. How insects deal with toxins in a complex nutrient environment is unclear. Here we investigated the influence of a classic plant secondary metabolite, allyl glucosinolate (sinigrin), and its hydrolyzed product allyl isothiocyanate (AITC), on the development of Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) when fed on diets with different protein-to-carbohydrate (p : c) ratios. We also examined the effects of these toxins on larval biochemistry, by chemically analyzing the frass produced by insects feeding on the different diets. As expected, AITC had a greater negative effect than sinigrin on H. armigera life-history traits. However, AITC at low concentration appeared to have a positive effect on some traits. Both sinigrin and AITC-induced detoxification activity in the gut, and the reaction was related to diet protein concentration. High-protein diets can provide the required free amino acid, especially cysteine, needed for the detoxification process. The nutrient content of the diet influences how plant secondary metabolites are handled, and the use of artificial diets in experiments investigating the metabolic fate of plant secondary compounds needs to be carefully evaluated.

关键词： diet protein glucosinolate gut metabolism Helicoverpa armigera isothiocyanate

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Trees species’ dispersal mode and habitat heterogeneity shape negative density dependence in a temperate forest

引用

森林生态系统:英文版 2023年第5期10卷 589-596页

作者： Lishunan Yang daniel j.johnson Zhichun Yang Xiaochao Yang Qiulong Yin Ying Luo Zhanqing Hao Shihong jia School of Ecology and Environment Northwestern Polytechnical UniversityXi’anShaanxi710072China Shaanxi Key Laboratory of Qinling Ecological Intelligent Monitoring and Protection Northwestern Polytechnical UniversityXi’anShaanxi710072China School of Forest Fisheriesand Geomatics SciencesUniversity of FloridaGainesvilleFLUSA School of Geography and Tourism Shaanxi Normal UniversityXi’anShaanxi710062China

Conspecific negative density dependence(CNDD)is a potentially important mechanism in maintaining species *** previous evidence showed habitat heterogeneity and species’dispersal modes affect the strength of CNDD at early life stages of trees(e.g.,seedlings),it remains unclear how they affect the strength of CNDD at later life *** examined the degree of spatial aggregation between saplings and trees for species dispersed by wind and gravity in four topographic habitats within a 25-ha temperate forest dynamic plot in the Qinling Mountains of central *** used the replicated spatial point pattern(RSPP)analysis and bivariate paircorrelation function(PCF)to detect the spatial distribution of saplings around trees at two scales,15 and 50 m,*** the signal was not apparent across the whole study region(or 25-ha),it is distinct on isolated areas with specific characteristics,suggesting that these characteristics could be important factors in ***,we found that the gravity-dispersed tree species experienced CNDD across habitats,while for wind-dispersed species CNDD was found in gully,terrace and low-ridge *** study suggests that neglecting the habitat heterogeneity and dispersal mode can distort the signal of CNDD and community assembly in temperate forests.

关键词： Biodiversity Conspecific negative density dependence Dispersal Replicated point patterns Temperate forest Topographic habitat

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：