检索结果-南通市图书馆

The effect of landscape complexity and microclimate on the thermal tolerance of a pest insect

Insect Science 2018年第5期25卷 905-915页

作者： lucy alford Kevin Tougeron Jean-Sebastien Pierre Francoise Burel Joan van Baaren UMR 6553 ECOBIO Centre National de la Recherche Scientitique Universite de Rennes I Rennes Cedex France Departement de Sciences Biologiques Insfitut de Recherche en Biologie Vegetale Universite de Montreal Montreal QC Canada Universite Europeenne de Bretagne (UEB) Rennes France

Landscape changes are known to exacerbate the impacts of climate change. As such, understanding the combined effect of climate and landscape on agroecosystems is vital if we are to maintain the fimction of agroecosystems. This study aimed to elucidate the effects of agricultural landscape complexity on the microclimate and thermal tolerance of an aphid pest to better understand how landscape and climate may interact to affect the thermal tolerance of pest species within the context of global climate change. Meteo- rological data were measured at the landscape level, and cereal aphids （Sitobion avenae, Metopolophium dirhodum and Rhopalosiphum padi） sampled, from contrasting landscapes （simple and complex） in winter 2013/2014 and spring 2014 in cereal fields of Brittany, France. Aphids were returned to the laboratory and the effect of landscape of origin on aphid cold tolerance （as determined by CTmin） was investigated. Results revealed that local landscape complexity significantly affected microclimate, with simple homogenous landscapes being on average warmer, but with greater temperature variation. Landscape complexity was shown to impact aphid cold tolerance, with aphids from complex land- scapes being more cold tolerant than those from simple landscapes in both winter and spring, but with differences among species. This study highlights that future changes to land use could have implications for the thermal tolerance and adaptability of insects. Fur- thermore, not all insect species respond in a similar way to microhabitat and microclimate, which could disrupt important predator-prey relationships and the ecosystem service they provide.

关键词： agroecosystems biological control cereal aphids climate change coldtolerance landscape ecology

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

Porphyrins,phthalocyanines,and related covalent-organic frameworks in the photochemical and electrochemical water splitting:A review

引用

Particuology 2024年第7期90卷 236-265页

作者： Oxana V.Kharissova Yolanda Peña Méndez Boris I.Kharisov Aleksandr LNikolaev Edith Luévano-Hipólito lucy T.González Universidad Autónoma de Nuevo León Ave.Universidad s/nSan Nicolás de los GarzaNuevo León66455Mexico Department of Chemistry Moscow State UniversityVorobievy HillsMoscowRussia CONACYT-Universidad Autónoma de Nuevo León Facultad de Ingeniería Civil-Departamento de Ecomateriales y EnergíaCd.UniversitariaC.P.66455San Nicolás de los GarzaNLMexico Tecnologico de Monterrey Escuela de Ingeniería y CienciasMonterreyNuevo León 64890Mexico Tecnologico de Monterrey Centro del AguaMonterreyNuevo León 64890Mexico

In this review,the possibilities of photochemical and electrochemical water splitting(WS)using porphyrins,phthalocyanines,related macrocycles,and their metal complexes are *** efforts are being carried out in order to develop novel and cheap methods for water decomposition to generate inexhaustible greener energy sources(molecular hydrogen)instead of oil and *** processes of WS in heterogeneous and homogeneous media require novel photo-and electrocatalysts,in particular those on macrocycle basis.A high WS efficiency has been observed for porphyrins and phthalocyanines,showing their suitability both for HER and OER processes are available using these relative compounds for WS *** can be used in photocatalytic and electrocatalytic WS processes both in their free forms or as metal porphyrins/porphyrinates,mainly loaded on various inorganic materials,such as Au NPs,C_(3)N_(4),GaP,KTaO_(3),GaP,and so on,as part of porphyrin-containing polymers or on electrode surface as modifying coatings,being sometimes better than commercial catalysts,such as Pt/*** H2 evolution can be considerably depended on the shape of porphyrin particles;in particular,porphyrin nanowires can yield up to 20 times more H2 than its *** certain cases,both HER and OER can be driven in the same electrolyte using metal *** capacity of metal porphyrins to generate ROS(in particular,singlet oxygen 1O_(2))under ultrasonic treatment is known and can be successfully used for H_(2)O_(2) and O_(2) *** can be used in similar processes in free form or as composites with inorganic or organic counterparts,being immobilized on nanocarbons,metal oxides and salts,or simply dissolved in water acting in a homogeneous *** additional use of ultrasound can lead to better results due to the synergistic effect of the sonochemical treatment and ***-organic frameworks are also applied for WS purposes and are mainly based

关键词： Porphyrins Phthalocyanines COFs Water splitting Photocatalysis Electrocatalysis

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

Hydroxyapatite composites with carbon allotropes:Preparation,properties,and applications

引用

Particuology 2024年第5期88卷 239-265页

作者： Boris I.Kharisov Oxana V.Kharissova lucy T.González Yolanda Peña Méndez Igor E.Uflyand Idalia Gómez de la Fuente Universidad Autónoma de Nuevo León Ave.UniversidadCiudad UniversitariaSan Nicolás de los GarzaNuevo León 66455Mexico Tecnologico de Monterrey Escuela de Ingeniería y CienciasMonterreyNuevo Leon 64890Mexico Department of Chemistry Southern Federal UniversityRostov-on-DonRussia

Hydroxyapatite(HA)and its composites with inorganic additives,dopants,and polymers is a rapidly developing branch in the materials *** particular,carbon allotropes are widely used in these composites being widely applied for medical *** a gap of insufficient generalization of recent achievements in the field of the HA/Carbon composites,in this review we present the state of the art of the field of HA composites and hybrids with classic carbon allotropes and *** composites are known for carbon nanotubes,nanofibers,graphene and its oxidized forms,as well as,in a lesser grade,for graphite,fullerenes,nanodiamonds,carbon nanofoams,*** composites can be fabricated by a variety of classic and less-common methods,such as co-precipitation(with or without ultrasonic treatment),CVD,hot isostatic pressing,hydrothermal,spark plasma sintering,biomimetic mineralization,thermal and plasma spray,electrochemical and electrophoretic deposition,self-assembling,3D printing,electrospinning,and lyophilisation,among *** of various synthesis techniques can be also carried out for composite *** or synthetic HA can be used as it is for further interaction with carbon allotropes or it can be first prepared and then reacted with carbon counterpart;similarly,carbon allotropes can be introduced into the interaction with HA directly or they can be first synthesized,in particular from *** biocompatible composites can be produced in the form of coatings,powders,and scaffolds and can additionally contain quantitative amounts of third phases,frequently natural or synthetic *** these composites,especially with O-containing functionalizing groups,HA disadvantages could be considerably decreased with simultaneous enhancement of mechanical properties,becoming similar to human bone,chemical stability and biocompatibility,as well as possessing antibacterial ***→G reduction and higher HA decoration were obs

关键词： Hydroxyapatite Carbon nanotubes Graphene Quantum dots Fullerenes Nanodiamonds

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

Half a century after their discovery:Structural insights into exonuclease and annealase proteins catalyzing recombineering

引用

Engineering Microbiology 2024年第1期4卷 39-54页

作者： lucy J.Fitschen Timothy P.Newing Nikolas P.Johnston Charles E.Bell Gökhan Tolun School of Chemistry and Molecular Bioscience and Molecular HorizonsUniversity of WollongongWollongongNSWAustralia The ARC Training Centre for Cryo-electron Microscopy of Membrane Proteins University of WollongongWollongongNSWAustralia Faculty of Science University of Technology SydneyUltimoNSW 2007Australia Department of Biological Chemistry and Pharmacology The Ohio State University College of MedicineColumbusOH 43210

Recombineering is an essential tool for molecular biologists,allowing for the facile and efficient manipulation of bacterial genomes directly in cells without the need for costly and laborious in vitro manipulations involving restriction *** main workhorses behind recombineering are bacteriophage proteins that promote the single-strand annealing(SSA)homologous recombination pathway to repair double-stranded DNA *** there have been several reviews examining recombineering methods and applications,comparatively few have focused on the mechanisms of the proteins that are the key players in the SSA pathway:a 5′→3′exonuclease and a single-strand annealing protein(SSAP or“annealase”).This review dives into the structures and functions of the two SSA recombination systems that were the first to be developed for recombineering in ***:the RecET system from *** Rac prophage and the𝜆Red system from bacteriophageλ.By comparing the structures of the RecT and Red𝛽annealases,and the RecE and𝜆Exo exonucleases,we provide new insights into how the structures of these proteins dictate their *** the sequence conservation of the𝜆λExo and RecE exonucleases gives more profound insights into their critical functional ***,as recombineering accelerates and evolves in the laboratory,a better understanding of the mechanisms of the proteins behind this powerful technique will drive the development of improved and expanded capabilities in the future.

关键词： Recombineering Redβ λExo RecE RecT Protein structure Annealase Exonuclease

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

High Dimension Multivariate Data Analysis for Small Group Samples of Chemical Volatile Profiles of African Nightshade Species

引用

Journal of Data Analysis and Information Processing 2024年第2期12卷 210-231页

作者： Lorna Chepkemoi Daisy Salifu lucy Kananu Murungi Henri E. Z. Tonnang International Centre of Insect Physiology and Ecology (ICIPE) Nairobi Kenya Department of Horticulture and Food Security Jomo Kenyatta University of Agriculture and Technology (JKUAT) Nairobi Kenya

Quantitative headspace analysis of volatiles emitted by plants or any other living organisms in chemical ecology studies generates large multidimensional data that require extensive mining and refining to extract useful information. More often the number of variables and the quantified volatile compounds exceed the number of observations or samples and hence many traditional statistical analysis methods become inefficient. Here, we employed machine learning algorithm, random forest (RF) in combination with distance-based procedure, similarity percentage (SIMPER) as preprocessing steps to reduce the data dimensionality in the chemical profiles of volatiles from three African nightshade plant species before subjecting the data to non-metric multidimensional scaling (NMDS). In addition, non-parametric methods namely permutational multivariate analysis of variance (PERMANOVA) and analysis of similarities (ANOSIM) were applied to test hypothesis of differences among the African nightshade species based on the volatiles profiles and ascertain the patterns revealed by NMDS plots. Our results revealed that there were significant differences among the African nightshade species when the data’s dimension was reduced using RF variable importance and SIMPER, as also supported by NMDS plots that showed S. scabrum being separated from S. villosum and S. sarrachoides based on the reduced data variables. The novelty of our work is on the merits of using data reduction techniques to successfully reveal differences in groups which could have otherwise not been the case if the analysis were performed on the entire original data matrix characterized by small samples. The R code used in the analysis has been shared herein for interested researchers to customise it for their own data of similar nature.

关键词： Random Forest Similarity Percentage PERMANOVA ANOSIM Non-Metric Multi-Dimensional Scaling

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

Storylines of family medicine Ⅳ:perspectives on practice—lenses of appreciation

引用

Family Medicine and Community Health 2024年第S3期12卷 33-42页

作者： William B Ventres Leslie A Stone Radeeb Akhtar Jeffrey M Ring lucy M Candib Erick Messias Ronald M Epstein Marc Tunzi Amy L Lee Christopher P Morley Carina M Brown David Slawson Jill Konkin David G Campbell Ian Couper Susan Williams Robert Brooks Lucie Walters Family and Preventive Medicine University of Arkansas for Medical Sciences College of MedicineLittle RockArkansasUSA Family Medicine and Community Health Icahn School of Medicine at Mount SinaiNew YorkNew YorkUSA Independent Health Psychologist Los AngelesCaliforniaUSA Family Medicine and Community Health UMass Chan Medical SchoolWorcesterMassachusettsUSA Psychiatry and Behavioral Neurosciences Saint Louis University School of MedicineSaint LouisMissouriUSA Family Medicine University of Rochester Medical CenterRochesterNew YorkUSA Family Medicine Residency Program Natividad Medical CenterSalinasCaliforniaUSA Family Medicine Tufts University School of MedicineBostonMassachusettsUSA Public Health and Preventive Medicine SUNY Upstate Medical UniversitySyracuseNew YorkUSA Cone Health Family Medicine Residency The University of North Carolina School of MedicineGreensboroNorth CarolinaUSA Family Medicine Atrium HealthCharlotteNorth CarolinaUSA Family Medicine University of Alberta Faculty of Medicine&DentistryEdmontonAlbertaCanada Cunninghame Arm Medical Centre Australian College of Rural and Remote MedicineLakes EntranceQueenslandAustralia Ukwanda Centre for Rural Health Stellenbosch University Faculty of Medicine and Health SciencesCape TownWestern CapeSouth Africa Adelaide Rural Clinical School The University of AdelaideAdelaideSouth AustraliaAustralia Department of Rural Health Broken Hill UniversityBroken HillNew South WalesAustralia Adelaide Rural Clinical School The University of Adelaide Faculty of Health and Medical SciencesMount GambierSouth AustraliaAustralia

Storylines of Family Medicine is a 12-part series of thematically linked mini-essays with accompanying illustrations that explore the many dimensions of family medicine,as interpreted by individual family physicians and medical educators in the USA and elsewhere around the ***‘Ⅳ:perspectives on practice—lenses of appreciation’,authors address the following themes:‘Relational connections in the doctor–patient partnership’,‘Feminism and family medicine’,‘Positive family medicine’,‘Mindful practice’,‘The new,old ethics of family medicine’,‘Public health,prevention and populations’,‘Information mastery in family medicine’and‘Clinical courage.’May readers nurture their curiosity through these essays.

关键词： thematic illustration doctor

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

Acute variceal bleeding:general management

引用

World Journal of Gastroenterology 2001年第4期7卷 466-475页

作者： David Patch lucy Dagher Liver Transplantation and Hepatobiliary Medicine 9~(th) Floor-Department of SurgeryRoyal Free Hospital NHS TrustPond Street-HampsteadLondon NW3 2QG

TREATMENT STRATEGIES FOR ACUTE VARICEAL BLEEDINGBackgoundAcute variceal bleeding has a significant mortality which ranges form 5% to 50% in patients with cirrhosis[1].Overall survival is probably improving,because of new therapeutic approaches,and improved medical ***,mortality is still closely related to failure to control hacmorrhage or carly rebleeding,which is a distinct characteristic of portal hypertensive bleeding and occures in as many as 50% of patients in the first days to 6 weeks after admission et al[2].

关键词： Acute Disease Esophageal and Gastric Varices Gastrointestinal Hemorrhage Humans

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

Seismic anisotropy of upper mantle in eastern Tibetan Plateau and related crust-mantle coupling pattern

引用

Science China Earth Sciences 2007年第8期50卷 1150-1160页

作者： Paul SILVER lucy FLESCH Carnegie Institution of Washington Washington DC 200015 USA

By using the polarization analysis of teleseismic SKS waveform data recorded at 116 seismic stations which respectively involved in China National Digital Seismograph Network, and Yunnan, Sichuan, Gansu and Qinghai regional digital networks, and portable broadband seismic networks deployed in Sichuan, Yunnan and Tibet, we obtained the SKS fast-wave direction and the delay time between fast and slow waves of each station by use of the stacking analysis method, and finally acquired the fine image of upper mantle anisotropy in the eastern Tibetan Plateau and its adjacent regions. We analyzed the crust-mantle coupling deformation on the basis of combining the GPS observation results and the upper mantle anisotropy distribution in the study area. The Yunnan region out of the plateau has dif-ferent features of crust-mantle deformation from the inside plateau. There exists a lateral transitional zone of crust-mantle coupling in the eastern edge of the Tibetan Plateau, which is located in the region between 26° and 27°N in the west of Sichuan and Yunnan. To the south of transitional zone, the fast-wave direction is gradually turned from S60°―70°E in southwestern Yunnan to near EW in south-eastern Yunnan. To the north of transitional zone in northwestern Yunnan and the south of western Sichuan, the fast-wave direction is nearly NS. From crust to upper mantle, the geophysical parameters (e.g. the crustal thickness, the Bouguer gravity anomaly, and tectonic stress direction) show the feature of lateral variation in the transitional zone, although the fault trend on the ground surface is inconsis-tent with the fast-wave direction. This transitional zone is close by the eastern Himalayan syntaxis, and it may play an important role in the plate boundary dynamics.

关键词： upper mantle anisotropy SKS wave fast-wave direction crust-mantle coupling lithospheric deformation

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

FUN TO LEARN ENGLISH lucy

引用

小学生导刊（中年级版） 2005年第9期 44-45页

作者： lucy

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

Personality and behavioral changes in Asian elephants(Elephas maximus)following the death of herd members

引用

Integrative Zoology 2021年第2期16卷 170-188页

作者： lucy RUTHERFORD Lindsay E.MURRAY School of Psychology University of ChesterChesterUK

Elephants are highly social beings with complex individual *** know that elephants have a general interest in death,investigating carcasses,not just limited to kin;however,research does not explore in depth whether individuals change their behavior or personality following traumatic events,such as the death of a *** a captive herd of Asian elephants(Elephas maximus)housed at Chester Zoo,UK,we measured social behavior and proximity and personality using the Ten-Item Personality Inventory,and found age-related and relationship-related changes in both behavior and personality following the deaths of herd ***,the herd spent less time socializing and engaging in affiliative behaviors following the death of the adult female when compared to baseline data,yet spent more time engaging in these behaviors after the death of two *** death of the central female had a dramatic impact on her infant calf,resulting in increasingly withdrawn behavior,yet had the opposite effect on her adult daughter,who subsequently established a more integrated role within the *** Stability fell in the motherless calf but rose in an adult female,who had lost her adult daughter,but had a new calf to care *** suggest that the greater impact on the behavior and personality of surviving herd members following the deaths of calves,compared to an adult member,attests to the significance of the unifying role played by calves within an elephant herd.

关键词： captive environment death elephant grief proximity

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

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：