检索结果-南通市图书馆

Planetary Homeostasis of Reactive Nitrogen Through Anaerobic Ammonium Oxidation

Engineering 2024年第7期38卷 175-183页

作者： Guibing Zhu Bangrui Lan Shuci Liu cameron m.callbeck Shanyun Wang Liping Jiang Asheesh Kumar Yadav Jan Vymazal mike S.m.Jetten Ganlin Zhang Yongguan Zhu Research Center for Eco-Environmental Sciences Chinese Academy of SciencesBeijing 100085China Department of Environment and Science Queensland GovernmentBrisbaneQLD 4102Australia Department of Environmental Sciences University of BaselBasel 4056Switzerland CSIR-Institute of minerals and materials Technology Bhubaneswar 751013India Faculty of Environmental Sciences Czech University of Life Sciences PraguePraha 16521Czech Republic Department of microbiology Radboud UniversityNijmegen 6525 XZThe Netherlands Key Laboratory of Watershed Geographic Sciences Nanjing Institute of Geography and LimnologyChinese Academy of SciencesNanjing 210008China State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China University of Chinese Academy of Sciences Beijing 100049China

The availability of nitrogen(N)is crucial for both the productivity of terrestrial and aquatic ecosystems ***,the overuse of artificial fertilizers and the energy required to fix nitrogen have pushed the global nitrogen cycle(N-cycle)past its safe operating limits,leading to severe nitrogen pollution and the production of significant amounts of greenhouse gas nitrous oxide(N2O).The anaerobic ammonium oxidation(anammox)mechanism can counteract the release of ammonium and N2O in many oxygenlimited situations,assisting in the restoration of the homeostasis of the Earth’s N *** this work,we looked into the characteristics of the anammox hotspots’distribution across various types of ecosystems *** hotspots are present at diverse oxic-anoxic interfaces in terrestrial systems,and they are most prevalent at the oxic-anoxic transition zone in aquatic *** on the discovery of an anammox hotspot capable of oxidizing ammonium anoxically into N2 without N2O by-product,we then designed an innovative concept and technical routes of nature-based anammox hotspot geoengineering for climate change,biodiversity loss,and efficient utilization of water *** 15 years of actual use,anammox hotspot geoengineering has proven to be effective in ensuring clean drinking water,regulating the climate,fostering plant and animal diversity,and enhancing longterm environmental *** sustainable biogeoengineering of anammox could be a workable natural remedy to resolve the conflicts between environmental pollution and food security connected to N management.

关键词： Biogeochemical N-cycle Oxic-anoxic interface Nature-based solution Biogeoengineering Nitrogen sustainable development

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

An electropenetrography waveform library for the probing and ingestion behaviors of Culex tarsalis on human hands

引用

Insect Science 2024年第4期31卷 1165-1186页

作者： Anastasia m.W.Cooper Samuel B.Jameson Victoria Pickens cameron Osborne Elaine A.Backus Kristopher Silver Dana N.mitzel Department of Entomology Kansas State UniversityManhattanKansasUSA Department of Tropical medicine Tulane University School of Public Health and Tropical MedicineNew OrleansLos AngelesUSA USDA Agricultural Research Service San Joaquin Valley Agricultural Sciences CenterParlierCaliforniaUSA National Bio and Agro-Defense Facility USDA Agricultural Research ServiceManhattanKansasUSA

Culex tarsalis Coquillett(Diptera:Culicidae)mosquitoes are capable of vectoring numerous pathogens affecting public and animal ***,the probing behaviors of mosquitoes are poorly understood because they occur in opaque ***(EPG)has the potential to elucidate these behaviors by recording the electrical signals generated during *** used an AC–DC EPG with variable input resistors(Ri levels)to construct a waveform library for *** feeding on human *** events associated with mosquito probing were used to characterize waveforms at four Ri levels and with two electrical current *** optimal settings for EPG recordings of *** probing on human hands was an Ri level of 10^(7)Ohms using an applied signal of 150 millivolts alternating *** for *** included those previously observed and associated with probing behaviors in Aedes aegypti L.(Diptera:Culicidae):waveform families J(surface salivation),K(stylet penetration through the skin),L(types 1 and 2,search for a blood vessel/ingestion site),m(types 1 and 2,ingestion),N(type 1,an unknown behavior which may be a resting and digestion phase),and W(withdrawal).However,we also observed variations in the waveforms not described in ***,which we named types L3,m3,m4,and *** investigation enhances our understanding of mosquito probing *** also provides a new tool for the automated calculation of peak *** work will facilitate future pathogen acquisition and transmission studies and help identify new pest and disease management targets.

关键词： AC-DC blood feeders electrical penetration graph EPG human hands mosquitoes waveform library

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

Atomically dispersed dual-metal-site PGm-free electrocatalysts for oxygen reduction reaction:Opportunities and challenges

引用

Susmat 2022年第5期2卷 569-590页

作者： Xiaoxuan Yang cameron Priest Yang Hou Gang Wu College of Chemical and Biological Engineering Zhejiang UniversityHangzhouChina Department of Chemical and Biological Engineering University at BuffaloThe State University of New YorkBuffaloNew YorkUSA Institute of Zhejiang University-Quzhou QuzhouChina School of Biological and Chemical Engineering NingboTech UniversityNingboChina

Atomically dispersed and nitrogen coordinated single metal site(mNx,m=Fe,Co,or mn)moieties embedded in partially graphitized carbon(denoted as m–N–C)are recognized as the most promising platinum group metal-free catalysts for the oxygen reduction reaction(ORR)in proton exchange membrane fuel ***,simply regulating their coordination environments and local structures of single metal sites cannot fundamentally change active site structure,which leads to insufficient activity and stability.A second transition metal can be incorporated to design dual-metal sites,offering a new opportunity to modulate the electronic and geometric structures of m–N–C ***,exploring optimal atomically dispersed dual-metal-site is essential to designing new active sites with enhanced ORR activity,and stability,especially breaking the activity-stability *** review provides a comprehensive analysis of the advances in developing atomically dispersed dual-metal site catalysts for the ORR,including innovative synthesis methods,primary structural configurations,and the mechanisms to promote catalytic *** aim to elucidate the crucial structure–property correlation,emphasizing the inherent electronic and geometric effects of dual metal ***,we discuss the current challenges of dual-metal site catalysts concerning rational design,precise synthesis,and high-fidelity structural characterization.

关键词： dual metal sites electrocatalysis fuel cells oxygen reduction PGm-free catalyst

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

Avoiding artefacts in microCT imaging of collagen scaffolds:Effect of phosphotungstic acid(PTA)-staining and crosslink density

引用

Bioactive materials 2022年第2期7卷 210-219页

作者： Kyung-Ah Kwon Daniel V.Bax Jennifer H.Shepherd Ruth E.cameron Serena m.Best Cambridge Centre for medical materials Department of Materials Science and MetallurgyUniversity of CambridgeCambridgeUnited Kingdom School of Engineering University of LeicesterLeicesterUnited Kingdom

X-ray micro-computed tomography(μ-CT)can be used to provide both qualitative and quantitative information on the structure of three-dimensional(3D)bioactive *** performed in a dry state,μ-CT accurately reflects the structure of collagen-based scaffolds,but imaging in a wet state offers challenges with *** we have used phosphotungstic acid(PTA)as a contrast agent to visualise fully hydrated collagen scaffolds in a physiologically relevant environment.A systematic investigation was performed to understand the effects of PTA on the results of μ-CT imaging by varying sample processing variables such as crosslinking density,hydration medium and staining *** samples in 0.3% PTA solution overnight completely stained the samples and the treatment provided a successful route forμ-CT analysis of crosslinked ***,significant structural artefacts were observed for samples which were either non-crosslinked or had low levels of crosslinking,which had a heterogeneous interior architecture with collapsed pores at the scaffold *** work highlights the importance of optimising the choice of processing and staining conditions to ensure accurate visualisation for hydrated 3D collagen scaffolds in an aqueous medium.

关键词： microCT crosslinking qualitative

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

Progress of Pb-Sn mixed Perovskites for Photovoltaics: A Review

引用

Energy & Environmental materials 2022年第2期5卷 370-400页

作者： Rajapakshe mudiyanselage Indrachapa Bandara Shashini m.Silva cameron C.L.Underwood K.D.G.Imalka Jayawardena Radu A.Sporea S.Ravi P.Silva Advanced Technology Institute Faculty of Engineering and Physical SciencesUniversity of SurreyGuildford Surrey GU27XHUnited Kingdom

Pb-Sn mixed perovskites are becoming increasingly popular as narrowbandgap(1.2–1.3 eV)light absorbers in single-junction perovskite solar cells(PSCs)and as bottom cells for all-perovskite tandem solar cells,for highefficiency,low-cost,lightweight,roll-to-roll printable photovoltaic(PV)*** the first report of planar Pb:Sn mixed PSCs in 2014,the power conversion efficiencies(PCE)have increased from 10%to 21%by the end of 2020 with an exponential growth in research conducted in this *** much effort,the performance and stability of Pb-Sn mixed PSCs are still limited,which constrains their long-term use in all-perovskite tandem *** review highlights the avenues explored in improving different aspects of Pb-Sn mixed PSCs and provides a comprehensive discussion of the interdependent factors affecting the device *** includes compositional engineering of the perovskite crystal,absorber layer fabrication and crystallization methods,bandgap tuning,Sn4+reduction,and surface passivation of the absorber layer,as well as the selection of interlayers and electrodes of the final PSC.

关键词： inorganic-organic hybrids lead-tin mixed perovskites perovskites photovoltaics solution-processed

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

Outrunning the Red Queen： bystander activation as a means of outpacing innate immune subversion by intracellular pathogens

引用

Cellular & molecular Immunology 2017年第1期14卷 14-21页

作者： Alicia m Holmgren cameron A mcConkey Sunny Shin Depatment of microbiology Perelman School of Medicine University of Pennsylvania Philadelphia PA 19104-6060 USA Immunology Graduate Group Perelman School of Medicine University of Pennsylvania Philadelphia PA 19104-6060 USA

Originally described by the late evolutionary biologist Leigh Van Valen, the Red Queen hypothesis posits that the evolutionary arms race between hosts and their pathogens selects for discrete, genetically encoded events that lead to competitive advantages over the other species. Examples of immune evasion strategies are seen throughout the co-evolution of the mammalian immune system and pathogens, such as the enzymatic inactivation of nuclear factor-KB signaling or host translation by pathogen-encoded virulence factors. Such immunoevasive maneuvers would be expected to select for the evolution of innate immune counterstrategies. Recent advances in our understanding of host immunity and microbial pathogenesis have provided insight into a particular innate immune adaptation, termed bystander activation. Bystander activation occurs as a consequence of infected cells alerting and instructing neighboring uninfected cells to produce inflammatory mediators, either through direct cell contact or paracrine signals. Thus, bystander activation can allow the immune system to overcome the ability of pathogens to disarm immune signaling in directly infected cells. This review presents an overview of the general hallmarks of bystander activation and their emerging role in innate immunity to intraceUular pathogens, as well as examples of recent mechanistic discoveries relating to the bystander activation during infection with specific pathogens relevant to human health and disease.

关键词： cell-cell communication cGAS exosomes gap junctions inflammasomes innate immunity

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

A longitudinal analysis of the U.S. Air Force Reserve Officers’ Training Corps physical fitness assessment

引用

military medical Research 2020年第2期7卷 166-173页

作者： cameron Smackey Jason mDe Freitas Applied Neuromuscular Physiology Laboratory Oklahoma State University192 CRCStillwaterOK 74078USA

Background:The *** Force physical fitness assessment(PFA)is used to determine the overall fitness of their *** is currently unknown to what extent the PFA scores of Reserve Officers’Training Corps(ROTC)cadets are affected by mandatory physical *** purpose of this investigation was to longitudinally examine the PFAs of ROTC cadets over a four-year period,evaluate the results across class ranks,and evaluate the sensitivity of the classification of the ***:Air Force ROTC cadets performed the PFAs(abdominal circumference,1-min pushups,1-min sit-ups,and a 1.5-mile run)in both the spring(n=26)and fall(n=22)*** were compiled over a four-year period(Spring 2014–Fall 2017)and were performed in accordance with Air Force Instruction 36–2905.A oneway repeated measures ANOVA was performed separately for the fall and spring groups for each dependent variable across the 4 ***,a one-way between groups ANOVA was performed for each dependent variable during the time point(fall 2015;n=46)with the most recorded cadets for each class ***:Longitudinal assessments revealed a main effect of time(P=0.010)on abdominal circumference;cadets had a smaller abdominal circumference in their freshman year than in their senior year.A main effect of time(P=0.006)was also observed on sit-up quantity;cadets performed more sit-ups in their junior year than in their freshman *** between class ranks during the same year(between-subjects ANOVA)revealed a main effect of class rank on sit-up quantity(P=0.003);the freshmen completed fewer repetitions than the sophomores(P=0.018)and the juniors did(P=0.001).Conclusions:The results indicated that only the sit-up component showed differences between class *** findings suggest that the Air Force PFA may not be sensitive enough to detect changes in physical fitness or distinguish between class ranks regarding physical performance,even after years of *** limitation may b

关键词： Class ranks Fitness assessment military Physical training ROTC

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

Leveraging mathematical models of disease dynamics and machine learning to improve development of novel malaria interventions

引用

Infectious Diseases of Poverty 2022年第3期11卷 37-53页

作者： monica Golumbeanu Guo-Jing Yang Flavia Camponovo Erin m.Stuckey Nicholas Hamon mathias mondy Sarah Rees Nakul Chitnis Ewan cameron melissa A.Penny Swiss Tropical and Public Health Institute AllschwilSwitzerland Key Laboratory of Tropical Translational medicine of ministry of Education and School of Tropical medicine and Laboratory medicine The First and Second Affiliated Hospital of Hainan Medical UniversityHainan Medical UniversityHaikouHainanPeople’s Republic of China University of Basel BaselSwitzerland Center for Communicable Disease Dynamics Department of EpidemiologyHarvard T.H.Chan School of Public HealthBostonMA02115USA The Bill&melinda Gates Foundation SeattleWAUSA Innovative Vector Control Consortium LiverpoolUK malaria Atlas Project Big Data InstituteUniversity of OxfordOxfordUK Curtin University PerthAustralia Telethon Kids Institute Perth Children’s HospitalPerthAustralia

Background:Substantial research is underway to develop next-generation interventions that address current malaria control *** there is limited testing in their early development,it is difficult to predefine intervention properties such as efficacy that achieve target health goals,and therefore challenging to prioritize selection of novel candidate ***,we present a quantitative approach to guide intervention development using mathematical models of malaria dynamics coupled with machine *** analysis identifies requirements of efficacy,coverage,and duration of effect for five novel malaria interventions to achieve targeted reductions in malaria ***:A mathematical model of malaria transmission dynamics is used to simulate deployment and predict potential impact of new malaria interventions by considering operational,health-system,population,and disease *** method relies on consultation with product development stakeholders to define the putative space of novel intervention *** couple the disease model with machine learning to search this multi-dimensional space and efficiently identify optimal intervention properties that achieve specified health ***:We apply our approach to five malaria interventions under *** for malaria prevalence reduction,we identify and quantify key determinants of intervention impact along with their minimal properties required to achieve the desired health *** coverage is generally identified as the largest driver of impact,higher efficacy,longer protection duration or multiple deployments per year are needed to increase prevalence *** show that interventions on multiple parasite or vector targets,as well as combinations the new interventions with drug treatment,lead to significant burden reductions and lower efficacy or duration ***:Our approach uses disease dynamic models and machine learning to support

关键词： Infectious diseases malaria Novel interventions mathematical modelling machine learning

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

菌根真菌可减少植物的适应性差异,但其共存取决于植物内在菌根反应的差异

引用

Journal of Plant Ecology 2023年第2期16卷 125-139页

作者： cameron Wagg Andrew mcKenzie-Gopsill Fredericton Research and Development Centre Agriculture and Agri-Food CanadaFrederictonNB E3B 4Z7Canada Charlottetown Research and Development Centre Agriculture and Agri-Food CanadaCharlottetownPE C1A 4N6Canada

植物-丛枝菌根真菌(AmF)可以调节竞争植物之间的土壤资源,以影响植物资源的捕获和适应性,使AmF成为植物共存的潜在媒介。本研究使用6种菌根状态不同的植物物种,通过生态位和适应性差异评估植物共存。在有或没有AmF的情况下,将15对竞争... 详细信息

植物-丛枝菌根真菌(AmF)可以调节竞争植物之间的土壤资源,以影响植物资源的捕获和适应性,使AmF成为植物共存的潜在媒介。本研究使用6种菌根状态不同的植物物种,通过生态位和适应性差异评估植物共存。在有或没有AmF的情况下,将15对竞争植物种植在一起。AmF对共存的影响是通过参数化成对的Lotka-Volterra植物竞争模型来确定的。通过比较在没有与AmF竞争的情况下生长的单个植物的枝条生物量与没有AmF的枝条生物量来确定6种植物物种对AmF的响应。研究结果表明,接种AmF减少了竞争者之间的适应度差异,但AmF介导的共存程度取决于竞争植物物种的身份。竞争植物物种之间更大的AmF响应差异减少了生态位重叠并增加了共存。这些结果说明,虽然AmF通常会减少适应性差异,但AmF的均衡效应并不总是足以克服由于生态位重叠导致的竞争不平衡,因此并不总是导致共存。相反,不同植物物种对AmF的内在生长反应可以预测生态位重叠减少,进而导致共存。这表明菌根依赖是一种旨在降低与竞争植物物种的生态位重叠程度,从而实现更多共存的植物策略。

关键词：共存理论入侵杂草一年生耕作制度植物-土壤相互作用生态位差异适合度差异共生

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

Keratinized Nuptial Spines Are Used for male Combat in the Emei moustache Toad(Leptobrachium boringii)

引用

Asian Herpetological Research 2011年第3期2卷 142-148页

作者： cameron m. HUDSON Xianjin HE Jinzhong FU Department of Integrative Biology University of Guelph50 Stone Road East College of Life Science and Technology Southwest University for Nationalities

We describe the natural history and reproductive behaviour of the Emei moustache Toad(Leptobrachium boringii) with an emphasis on the development of keratinized nuptial spines in males and document combat behaviour for the first time in this species. Between February and march of 2011, 19 female and 43 male L. boringii from mount Emei UNESCO World Heritage Site, Sichuan, China were observed throughout the breeding season. This species exhibits male-biased sexual size dimorphism(SSD) with limited evidence of paternal care(nest guarding by males). Prior to the breeding season males grow 10 – 16 keratinized spines on their upper lip, which fall off once the season has ended. Throughout the breeding season males construct and defend aquatic nests where they produce advertisement calls to attract females. During this time we documented 14 cases involving a total of 22 males where males used their moustaches for aggressive interaction. Combat typically occurred at the beginning of the season when males would compete for a limited number of available nest sites. Neither male body size, nor body condition significantly affects the outcome of an aggressive interaction, suggesting that size may not be the only factor influencing an individual’s chance of victory. Our evidence for male competition and aggression, along with observed paternal care are potential mechanisms to explain the evolution of male-biased SSD observed in this species.

关键词： reproductive behaviour territoriality Leptobrachium boringii secondary sexual characters

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：