检索结果-南通市图书馆

BIOINSECTICIDES AS FUTURE MAINSTREAM PEST CONTROL AGENTS: OPPORTUNITIES AND CHALLENGES

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Agricultural Science and Engineering 2022年第1期9卷 82-97页

作者： Mingbo QU Hans MERZENDORFER bernard MOUSSIAN Qing YANG School of Bioengineering Dalian University of TechnologyDalian 116024China State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijing 100193China Institute of Biology University of Siegen57076 SiegenGermany Interfaculty Institute of Cell Biology University of Tübingen72076 TübingenGermany Shenzhen Branch Guangdong Laboratory for Lingnan Modern AgricultureGenome Analysis Laboratory of the Ministry of Agriculture and Rural AffairsAgricultural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhen 518120China

Bioinsecticides are naturally-occurring substances from different sources that control insect *** bioinsecticides should have low toxicity to non-target *** should also be easily degraded in sewage treatment works and natural environments,highly effective in small quantities and affect target pests *** concerns about possible side-effects of synthetic pesticides have accelerated bioinsecticide research and ***,to develop bioinsecticides into mainstream products,their high production costs,short shelf-life and often uncertain modes of action need to be *** review summarizes current progress on bioinsecticides which are categorized as biochemical insecticides and their derivatives,plant-incorporated protectants,and microbial *** current constraints that prevent bioinsecticides from being widely used are discussed and future research directions are proposed.

关键词： biochemical insecticide bioinsecticide microbial bioinsecticides plant-incorporated protectant RNA insecticide

Application of the Point-Descriptor-Precedence representation for micro-scale traffic analysis at a non-signalized T-junction

在线全文

学校读者我要写书评

暂无评论

Geo-Spatial Information Science 2023年第3期26卷 406-430页

作者： Amna Qayyum bernard De Baets Laure De Cock Frank Witlox Guy De Tré Nico Van de Weghe Department of Geography Ghent UniversityGhentBelgium Department of Data Analysis and Mathematical Modelling Ghent UniversityGhentBelgium Department of Telecommunications and Information Processing Ghent UniversityGhentBelgium

An intersection of two or more roads poses a risk for potential conflicts among *** the reasons triggering such conflicts are not clear,as they might be too subtle for the human *** environment also plays a part in understanding where,when,and why a particular vehicle interaction has occurred in a certain ***,it is of paramount importance to dive deeper into the vehicle interaction at a micro-scale within the embedded geographical environment,particularly at the *** would in turn assist in evaluating the association of vehicle interactions with conflict risks and near-miss ***,detection of such micro traffic interactions could also be used to improvise the complexity of the already established transport ***,traffic at intersections has been explored mainly for flow estimation,capacity and width measurements,and traffic congestion,etc.,whereas the detection of micro-scale traffic interactions at intersections remains relatively *** this paper,we present a novel approach to retrieve and represent micro-scale traffic movement interactions at a non-signalized T-junction by extending a recently introduced qualitative spatiotemporal Point-Descriptor-Precedence(PDP)*** study how the PDP representation offers a fine solution to study the interaction of traffic flows at *** permits tracking the micro-movement of vehicles in much finer detail,which is used later to retrieve movement patterns from a motion *** conventional approaches,we start our approach with the actual movements before modeling the static intersection ***,with the aid of illustrative examples,we discuss how the length,width,and speed of the vehicles can be exploited in our approach to detect specific patterns more ***,we address the potential benefits of our approach for traffic safety assessment and how it can be extended to a network of

关键词： Vehicle interaction traffic research pattern identification traffic safety spatiotemporal representation movement pattern

Aerosol scattering coefficients and major chemical compositions of fine particles observed at a rural site in the central Pearl River Delta,South China

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2012年第1期24卷 72-77页

作者： Xinming Wang Xiang Ding Xiaoxin Fu Quanfu He Shaoyi Wang Francois bernard Xiuying Zhao Dui Wu State Key Laboratory of Organic Geochemistry Guangzhou Institute of GeochemistryChinese Academy of Sciences Guangzhou 510640China Graduate University of Chinese Academy of Sciences Beijing 100049China Guangzhou Environmental Monitoring Center Guangzhou 510030China Institute of Tropical and Marine Meteorology China Meteorological AgencyGuangzhou 510080China

During November–December 2010 aerosol scattering coefficients were monitored using a single-waved （525 nm） Nephelometer at a regional monitoring station in the central Pearl River Delta region and 24-hr fine particle （PM 2.5） samples were also collected during the period using quartz filters for the analysis of major chemical components including organic carbon （OC）,elemental carbon （EC）,sulfate,nitrate and *** average,these five components accounted for about 85% of PM 2.5 mass and contributed 42% （OC）,19% （SO 4 2 -）,12% （NO 3 -）,8.4% （NH 4＋） and 3.7% （EC）,to PM 2.5 mass.A relatively higher mass scattering efficiency of 5.3 m 2/g was obtained for fine particles based on the linear regression between scattering coefficients and PM 2.5 mass *** extinction budget based on IMPROVE approach revealed that ammonium sulfate,particulate organic matter,ammonium nitrate and EC in average contributed about 32%,28%,20% and 6% to the light extinction coefficients,respectively.

关键词： scattering coefficients visibility fine particle (PM 2.5) chemical compositions

White light luminescence in Dy/Tm co-doped yttria stabilized zirconia single crystals

在线全文

学校读者我要写书评

暂无评论

Journal of Rare Earths 2023年第12期41卷 1904-1910,I0003页

作者： Xing Hong Lei Zhang Shoulei Xu Zeyu Cheng Yazhao Wang bernard A.Goodman Dingkang Xiong Wen Deng School of Physical Science and Technology Guangxi UniversityNanning530004China Electronic Information School Wuhan UniversityWuhan430072China

A series of high quality Dy_(2)O_(3) and Tm_(2)O_(3)co-doped yttria stabilized zirconia(YSZ) single crystals was *** crystals have a single cubic structure,and exhibit the characteristic of Dy^(3+)(blue and yellow emissions) and Tm^(3+)(blue emission) under excitation with NUV *** rtantly,the hue can be varied between blue and white by modifying the Tm^(3+)/Dy^(3+)*** photoluminescence and decay curves are consistent with the existence of resonance-type energy transfer from Tm^(3+)to Dy^(3+)ions via an electric multipole interaction *** luminescence intensity is observed in YSZ doped with 0.50 mol% Tm_(2)O_(3) and 0.75 mol% Dy_(2)O_(3),and this sample has CIE coordinates(x = 0.33,y = 0.33) in accordance with those for white ***,the outstanding luminescence properties of these single crystals suggest potential applications in white light emission devices.

关键词： YSZ single crystal Tm^(3+)/Dy^(3+)co-doping Optical floating zone method Resonance energy transfer White light emission Rare earths

Efficacy and safety profile of LCR35 complete freeze-dried culture in irritable bowel syndrome:A randomized,double-blind study

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2012年第17期18卷 2067-2075页

作者： Michel Dapoigny Thierry Piche Philippe Ducrotte bernard Lunaud Jean-Michel Cardot Annick Bernalier-Donadille Médecine Digestive Centre Hospitalier Universitaire(CHU) Estaing CHU Clermont-FerrandClermont UniversitéInserm UMR 76663001 F-Clermont-FerrandFrance Department of Gastroenterology and Inserm 576 Hpital de l'Archet 206202 NiceCedex 3France Department of Hepatogastroenterology and Nutrition Hpital Charles NicolleInserm UMR 107376031 RouenCedexFrance Department of Gastroenterology Centre République63000 Clermont-FerrandFrance Biopharmacy Department Faculty of Pharmacy63000 Clermont-FerrandFrance UR454 Microbiology Division Institut National de la Recherche AgronomiqueResearch Centre of Clermont-Ferrand-Theix63122 Saint Genès-ChampanelleFrance

AIM:To assess the effects and safety of Lactobacillus casei rhamnosus LCR35 complete freeze-dried culture(LCR35) in patients suffering from irritable bowel syndrome(IBS).METHODS:A randomized,double-blind pilot study was performed in 50 patients complaining of IBS symptoms complying with RomeⅢ*** were allocated to receive either LCR35(n = 25) at a minimum daily dose of 6 × 108 colony forming units or placebo(n = 25) for 4 *** inclusion,after treatment and 2 wk later,patients completed the IBS severity *** from baseline in the IBS severity score at the end of treatment was the primary efficacy *** were compared between groups in the whole population and in IBS subtypes(IBS with predominance of constipation,IBS with predominance of diarrhoea,mixed IBS,unsubtyped IBS).The presence of lactobacillus casei rhamnosus in stools was investigated at inclusion and at the end of *** gastrointestinal quality of life questionnaire and the hospital anxiety and depression(HAD) scale were also ***:Both groups were balanced for baseline *** 85% of patients,stool analyses showed that lactobacillus casei rhamnosus able to survive in the digestive *** the whole population,improvements in the IBS severity score did not differ significantly between treatments with a 25% decrease after 4-wk treatment,and a 15% decrease from baseline 2 wk later in both *** IBS subgroups,statistical analysis could not be performed due to small sample size,but a clinical response in favour of LCR35 was observed in IBS patients with predominance of diarrhoea:no change in the symptom severity score was seen with the placebo after 4 wk treatment,whereas a clinically relevant decrease occurred with LCR35(-37% vs-3%).Furthermore,in spite of an increase in symptom intensity,the IBS severity score was maintained below the baseline value 2 wk later with LCR35(-19% from baseline),whilst a slight 5% increase from baseline was observ

关键词： Irritable bowel syndrome Lactobacillus casei rhamnosus Probiotics Symptom severity score

Platelet-activating factor in cirrhotic liver and hepatocellular carcinoma

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2006年第17期12卷 2773-2778页

作者： Muriel Mathonnet bernard Descottes Denis Valleix Véronique Truffinet Franois Labrousse Yves Denizot Service de Chirurgie Digestive Endocrinienne et Générale CHU Dupuytren2 avenue Luther King87042 LimogesFrance Service de Chirurgie Viscérale et Transplantation CHU Dupuytren 2 avenue Martin Luther King87042 LimogesFrance UMR CNRS 6101 Faculté de Médecine 2 rue du Docteur Marcland87025 LimogesFrance Supported by "La Ligue Nationale Fran(?)aise Centre le Cancer" (Comité de la Corrèze) Service d'Anatomo-Pathologie CHU Dupuytren 2 avenue Luther King87042 LimogesFrance UMR CNRS 6101 Faculté de Médecine 2 rue du Docteur Marcland87025 LimogesFrance Supported by "La Ligue Nationale Franaise Centre le Cancer" (Comité de la Corrèze)

AIM： Platelet-activating factor （PAF） is a pro-inflammatory and angiogenic lipid mediator. Here we aimed to investigate levels of PAF, lyso-PAF （the PAF precursor）, phospholipase A2 （PLA2, the enzymatic activity generating lyso-PAF）, acetylhydrolase activity （AHA, the PAF degrading enzyme） and PAF receptor （PAF-R） transcripts in cirrhotic liver and hepatocellular carcinoma （HCC）. METHODS： Twenty-nine patients with HCC were enrolled in this study. Cirrhosis was present in fourteen patients and seven had no liver disease. Tissue PAF levels were investigated by a platelet-aggregation assay. Lyso- PAF was assessed after its chemical acetylation into PAR AHA was determined by degradation of [^3H]-PAE PLA2 levels were assessed by EIA. PAF-R transcripts were investigated using RT-PCR. RESULTS： Elevated amounts of PAF and PAF-R transcripts 1 （leukocyte-type） were found in cirrhotic tissues as compared with non-cirrhotic ones. Higher amounts of PAF and PAF-R transcripts 1 and 2 （tissue-type） were found in HCC tissues as compared with non-tumor tissues. PLA2, lyso-PAF and AHA levels were not changed in cirrhotic tissues and HCC. CONCLUSION： While the role of PAF is currently unknown in liver physiology, this study suggests its potential involvement in the inflammatory network found in the cirrhotic liver and in the angiogenic response during HCC.

关键词： Hepatocellular carcinoma Cirrhosis Platelet- activating factor PAF receptors

Dieback intensity but not functional and taxonomic diversity indices predict forest productivity in different management conditions: Evidence from a semi-arid oak forest ecosystem

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Arid Land 2022年第2期14卷 225-244页

作者： Mona KARAMI Mehdi HEYDARI Ali SHEYKHOLESLAMI Majid ESHAGH NIMVARI Reza OMIDIPOUR YUAN Zuoqiang bernard PREVOSTO Faculty of Natural Resources Chalus BranchIslamic Azad UniversityChalus 46615/397Iran Department of Forestry Chalous BranchIslamic Azad UniversityChalous 46615/397Iran Department of Rangeland and Watershed Management Faculty of Natural Resources and Earth SciencesShahrekord UniversityShahrekord ***Iran Key Laboratory of Forest Ecology and Management Institute of Applied EcologyChinese Academy of SciencesShenyang 110164China INRAE Aix Marseille UniversityUMR RECOVERMediterranean Ecosystems and RisksAix-en-Provence 13128France

The relationships between different aspects of diversity(taxonomic,structural and functional)and the aboveground biomass(AGB)as a major component of global carbon balance have been studied extensively but rarely under the simultaneous influence of forest dieback and *** this study,we investigate the relationships between taxonomic,functional and structural diversity of woody species(trees and shrubs)and AGB along a gradient of dieback intensity(low,moderate,high and no dieback as control)under two contrasted management conditions(protection by central government *** management by natives)in a semi-arid oak(Quereus brantii Lindl.)forest *** was estimated and taxonomic diversity,community weighted average(CWM)and functional divergence indices were *** found that the aerial biomass was significantly higher in the intensively used area(14.57(±1.60)t/hm^(2))than in the protected area(8.70(±1.05)t/hm^(2))due to persistence of some large trees but with decreasing values along the dieback intensity gradient in both *** of height(H),leaf nitrogen content(LNC)and leaf dry matter content(LDMC)were also higher in the traditional managed area than in the protected *** contrast,in the protected area,the woody species diversity was higher and the inter-specific competition was more intense,explaining a reduced H,biomass and *** to the results of CWM,none of the functional diversity traits(FDvar)was affected by dieback intensity and only FDvar values of LNC,leaf phosphorus content(LPC)and LDMC were influenced by *** also found significantly positive linear relationships of AGB with CWM and FDvar indices in the protected area,and with taxonomic and structural diversity indices in the traditional managed *** results emphasize that along a dieback intensity gradient,the leaf functional traits are efficient predictors in estimating the AGB in protected forests,while taxonomic and structural indices provide bett

关键词： environmental stress sudden oak dieback degradation conservation selection effect hypothesis

Time and Quantity Based Hybrid Consolidation Algorithms for Reduced Cost Products Delivery

在线全文

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2021年第10期69卷 409-432页

作者： Muhammad Ali Memon Asadullah Shaikh Adel Sulaiman Abdullah Alghamdi Mesfer Alrizq bernard Archimède Department of Information Technology University of SindhJamshoroSindh76090Pakistan College of Computer Science and Information Systems Najran UniversityNajran61441Saudi Arabia University of Toulouse INP-ENIT47 Avenue d’AzereixBP1629F-65016Tarbes CedexFrance

In today’s competitive business environment,the cost of a product is one of the most important considerations for its *** are heavily involved in research strategies to minimize the cost of elements that can impact on the final price of the *** is one such *** products arrive from diverse locations to consumers in today’s digital era of online ***,the logistics sector faces several dilemmas from order attributes to environmental changes in this *** has specially been noted during the ongoing Covid-19 pandemic where the demands on online businesses have increased several ***,the methodology to optimise delivery cost and its impact on environmental focus by reducing CO_(2) emissions has gained *** resultant strategy of Shipment Consolidation that has evolved is an approach that combines one or more transport orders in the same vehicle for *** Consolidation has been categorized in three order scheduling approaches:Time based consolidation,Quantity based consolidation,and a Hybrid(Time-Quantity)based *** this paper,a new Hybrid Consolidation approach is *** the Hybrid approach,it has been shown that order delivery can be facilitated by taking into account not only the order pick up time,but also the total order *** results have shown that if a time window is available in respect of the order delivery time,then the order can be delayed from pickup to consolidate it with other orders for cost *** hybrid approach is based on four consolidation principles,two of which work on fixed departure and two,on demand *** of these rules have been implemented and tested here with an application case *** analysis of the results is illustrated with different planning evaluation *** Result analyses indicate that consolidation of orders is increased with each implemented rule hence motivating us towards t

关键词： Consolidation transportation supply chain cost minimization

A validation of WEPP water quality routines in uniform and nonuniform agricultural hillslopes

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Soil and Water Conservation Research 2024年第3期12卷 487-505页

作者： Ryan P.McGehee Dennis C.Flanagan bernard A.Engel John E.Gilley Department of Agricultural and Biosystems Engineering Iowa State University4352 Elings Hall605 Bissel RoadAmesIA50011USA USDA-Agricultural Research Service National Soil Erosion Research Laboratory275 South Russell StreetWest LafayetteIN47907USA Department of Agricultural and Biological Engineering Purdue University225 South University StreetWest LafayetteIN47907USA USDA-Agricultural Research Service Agroecosystem Management Research UnitRoom 238Chase HallUniversity of NebraskaLincolnNE68583USA

Current watershed-scale,nonpoint source pollution models do not represent the processes and impacts of agricultural best management practices on water quality with sufficient detail.A Water Erosion Pre-diction Project-Water Quality(WEPP-WQ)model was recently developed which is capable of simulating nonpoint source pollutant transport in nonuniform hillslope conditions such as those with ***,WEPP-WQ has not been validated for these conditions,and prior validation work only eval-uated calibrated performance rather than uncalibrated performance,with the latter being most relevant to model *** study evaluated uncalibrated and calibrated model performance in two plot-scale,artificial rainfall studies.179 observations were compared to corresponding WEPP-WQ simulations of runoff,sediment yield,and soluble and particulate nutrient forms for both nitrogen and *** validation results were mixed for the different field conditions,model configurations,and prediction ***-Sutcliffe Efficiencies for uncalibrated simulations of uniform conditions were generally greater than 0.6 except for soluble nitrogen predictions which were *** of nonuniform conditions were generally'unsatisfactory'except for runoff predictions which were quite good(NSE=0.78).Performance was improved substantially for almost all endpoints with *** exceptions to this occurred because the objective function for calibration was based on log-space differences so as to more equally-weight calibration of unsaturated conditions that tend to produce lesser runoff volumes and sediment *** results for both uniform and nonuniform condi-tions were generally'satisfactory'or'good'according to widely accepted model performance criteria.

关键词： Water quality Nonpoint Validation Vegetative filter strip Best management practice WEPP