检索结果-南通市图书馆

Setting large-and medium-sized mammal restoration goals in a last mountain Chaco remnant from central Argentina

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Ecological processes 2023年第1期12卷 301-312页

作者： Daniel Renison Harold Rusbelth Quispe-melgar GAErica Cuyckens ana mCingolani Centro de Ecología y Recursos Naturales Renovables Dr.Ricardo LutiInstituto de Investigaciones Biológicas y TecnológicasUniversidad Nacional de Córdoba-CONICETAv.Vélez Sarsfield 1611X5016GCA CórdobaArgentina Ecosistemas argentinos 27 de abril 2050CórdobaCórdobaArgentina Facultad de Ciencias de la Salud Universidad ContinentalHuancayoPeru Centro de Estudios Territoriales Ambientales y Sociales(CETAS UNJu)Instituto de Ecorregiones Andinas(INECOAUNJu-CONICET)Alberdi 474600San Salvador de JujuyJujuyArgentina Instituto multidisciplinario de Biología Vegetal CONICET-Universidad Nacional de CórdobaAv.Vélez Sarsfield 1611X5016GCA CórdobaArgentina.

Background Setting large-and medium-sized wild mammal(≥2 kg)restoration goals is important due to their role as ecosystem engineers and generalized numeric ***,determining wild mammal restoration goals is very challenging due to difficulties in obtaining data on current mammal density and due to unclear information on what mammal density values should be used as a *** we chose a 154 ha conservation area within one of the last remnants of the mountainous Chaco from central *** suspected that extensive and unreported defaunation had occurred due to past human pressure and the introduction of non-native *** conduct the analyses,we used a simplified technique that integrates methods used in rangeland and ecological *** Eight native mammal species including only one herbivore species,and four non-native mammal species including three herbivore species were detected during 6113 camera trap *** used known cattle densities as estimated by droppings and direct counts,together with the relative abundance indexes obtained from camera trap photos to calculate the densities of the other species,correcting for mammal *** for the least and most abundant native species were 0.2 and 1.33 individuals km^(-2),respectively;and for non-native species,0.03 and 5.00 individuals km^(-2),*** and non-native species represented 0.8%and 99.2%,respectively,of the bio-mass *** values for native herbivore biomass,as estimated from net primary productivity,were 68 times higher than values estimated for the study area(3179 vs.46.5 kg km^(-2)).Conclusions There is an urgent need to increase native mammals,with special emphasis on herbivore biomass and richness,while non-native mammal numbers must be *** cattle are widespread in large portions of the globe and there is a lot of experience estimating their abundances,the ratio method we used extrapolating from cattle to other large-and medium-s

关键词： Camera trap mammal survey Reference biomass Exotic mammal

同方期刊数据库

Hepatic adenomatosis in glycogen storage disease:Radio-pathological correlation

在线全文

学校读者我要写书评

暂无评论

Hepatobiliary & pancreatic Diseases International 2021年第6期20卷 579-581页

作者： João m Louro ana m Alves JoséR Brandão manuela França Department of Radiology Centro Hospitalar Universitário do Porto EPEPorto 4099-001Portugal Department of anatomical pathology Centro Hospitalar Universitário do Porto EPEPorto 4099-001Portugal

Glycogen storage disease type I(GSD type I),also known as von Gierke disease,is an autosomal recessive disorder of the glycogen metabolism pathway,caused by a deficiency of glucose-6-phosphatase(GSD type Ia)or glucose... 详细信息

关键词： 1] metabolism trans

Kinetic and morphology study of alginate-vineyard pruning waste biocomposite vs. non modified vineyard pruning waste for dye removal

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2015年第12期27卷 158-167页

作者： Xanel Vecino Rosa Devesa-Rey Salvador Villagrasa Jose m.Cruz ana B.moldes Chemical Engineering Department School of Industrial Engineering (EEI)University of VigoCampus As Lagoas-Marcosende Defense University Center Naval AcademyUniversity of Vigo materials Engineering Department School of Industrial Engineering (EEI)University of VigoCampus As Lagoas-Marcosende

In this work a comparative bioadsorption study between a biocomposite consisting of hydrolysed vineyard pruning waste entrapped in calcium alginate spheres and non entrapped vineyard residue was carried *** have demonstrated that the biocomposite based on lignocellulose-calcium alginate spheres removed 77.3% of dyes,while non entrapped lignocellulose eliminated only removed 27.8% of colour *** experimental data were fitted to several kinetic models（pseudo-first order,pseudo-second order,Chien-Clayton model,intraparticle diffusion model and Bangham model）; being pseudo-second order the kinetic model that better described the adsorption of dyes onto both *** addition,a morphological study（roughness and shape） of alginate-vineyard biocomposite was established under extreme conditions,observing significant differences between hydrated and dehydrated alginate-vineyard *** techniques used to carry out this morphological study consisted of scanning electron microscopy（SEm）,perfilometry and 3D surface analysis.

关键词： Immobilized alginate-vineyard Dyes Kinetic studies Roughness Spherical shape

Characterization of folic acid,5-methyltetrahydrofolate and synthetic folinic acid in the high-affinity folate transporters:impact on pregnancy and development

在线全文

学校读者我要写书评

暂无评论

Reproductive and Developmental medicine 2023年第2期7卷 102-107页

作者： ana m.palacios Rachel A.Feiner Robert m.Cabrera Department of Nutritional Sciences Dell Pediatric Research InstituteUniversity of Texas at AustinAustinTexas Department of Health policy and Community Health Jiann Ping Hsu College of Public HealthGeorgia Southern UniversitySavannahGeorgia Department of Behavioral Neuroscience College of ScienceNortheastern UniversityBostonMassachusetts Center for precision Environmental Health Baylor College of MedicineHoustonTexas

Objectives:Folates are B vitamins that are essential for several molecular,cellular,and biological processes,including nucleotide synthesis,methylation,and methionine *** physiological impacts of these processes on health also extend to cell proliferation,folate deficiency anemia,and reduction of the risk of birth defects during *** primary objective of this study was to characterize the binding affinities of different folate forms,folic acid(FA),5-methyltetrahydrofolate(5mTHF),and folinic acid,to the folate receptorsαandβ,and to the bovine milk folate binding *** three dietary forms of folate are found in enriched grains(FA),various fruits and leafy vegetables(folinic acid),and red blood cells(5mTHF).methods:The half maximal inhibitory concentration values and binding curves of each of these folates for each receptor were ***:Our results indicated that FA had the highest affinity for all folate receptors,followed by 5mTHF,and lastly,by folinic acid,examined by several orders of ***:These data are expected to provide new insights into the therapeutic applications of the different forms of folate in a variety of diseases.

关键词： 5-methyltetrahydrofolate folic acid folinic acid folate receptorα folate receptorβ affinity

Torrential flood prevention in the Kolubara river basin

在线全文

学校读者我要写书评

暂无评论

Journal of mountain Science 2017年第11期14卷 2230-2245页

作者： KOSTADINOV Stanimir DRAGI?EVI? Slavoljub STEFANOVI? Tomislav NOVKOVI? Ivan pETROVI? m.ana University of Belgrade Faculty of Forestry University of Belgrade Faculty of Geography Institute of Forestry Serbian Academy of Sciences and Arts Geographical Institute "J. Cviji?"

One of the most vulnerable parts to natural hazards in Serbia is Kolubara river basin. In the past, during the period from 1929 to 2013, 121 torrential flood events in the Kolubara river basin were recorded which show that this territory is extremely vulnerable to the torrential floods. The extreme event which occurred in may 2014 causing the catastrophic material damages and casualties was the latest and historical flood. The analysis of natural conditions in the Kolubara basin uniformly showed that this area is predisposed to a greater number of torrential floods due to its geomorphological, hydrological and land use properties. Torrential floods are closely related to the intensity and spatial distribution of erosive processes in the upper part of the Kolubara basin. The estimation of soil erosion potential is generally achieved by Erosion potential model(Epm). For the purposes of determining the degree of torrential properties in various water streams in the Kolubara basin, the calculation ofsusceptibility to torrential floods was assessed by Flash Flood potential Index(FFpI). more than half of the basin area(57.2%) is located within the category of very weak and weak erosion(Z_(sr) = 0.35), but the category of medium erosion is geospatially very common. Such a distribution of medium erosion category provides conditions for generating, i.e. production of sediment which would boost torrential properties of water streams. After the classification of the obtained FFpI values it was determined that 25% of the Kolubara basin is very susceptible to torrents and this data should be seriously taken into consideration. Based on the analyses, the best and most successful manner of defence is prevention which consists of the integrated river basin management system(integrated torrent control system) so that technical works in hydrographic networks of torrents and biological and biotechnical works on the slope of the basin would be the best solution. permanent control of er

关键词： Soil erosion Torrential floods Erosioncontrol works Integrated river basin management

movement initiation of millimeter particles on a rotating rough surface: The role of adhesion

在线全文

学校读者我要写书评

暂无评论

particuology 2020年第6期18卷 92-99页

作者： Karina de los Angeles Valenzuela Aracena Rodolfo O.Unac Irene Ippolito ana m.Vidales INFAp CONICETDepartamento de FisicaFacultad de Ciencias Fisico Matematicas y NaturalesUniversidad Nacional de San LuisEjercito de los Andes 950D5700HHWSan LuisArgentina Universidad de Buenos Aires Facultad de IngenieriaGrupo de Medios PorososPaseo Colon 850C1063ACV Buenos AiresArgentina

We performed experiments to determine the critical moment for movement initiation of a millimeter bead on a rotating rough *** corresponding critical angular velocities were measured for glass and stainless-steel ball bearings over two different rough surfaces with glued glass beads.A basic theoretical analysis was developed to explain the observed *** the expectation of a simple approach with the presence of the obstacles offered by a rough surface could be sufficient to describe the problem,we prove here that the sole con sideration of these obstacles,and even friction,are insufficient to explain the results in the range of a few-millimeter glass *** the thermodynamic work of adhesion between surfaces is significant,the adhesion forces must be considered in the force balance for particle detachment:.This effect is a determinant for describing theoretically and numerically the dynamics of millimeter particles.

关键词： Detachment Adhesion Centrifugation

Thiopurine-methyltransferase variants in inflammatory bowel disease:prevalence and toxicity in Brazilian patients

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 2014年第12期20卷 3327-3334页

作者： ana Teresa p Carvalho Barbara C Esberard Renata S B Fróes Davy C m Rapozo ana B Grinman Tatiana A Simo Juliana C V C Santos Antonio José V Carneiro Luis Felipe Ribeiro-pinto Heitor S p de Souza Disciplina de Gastroenterologia e Endoscopia Digestiva Universidade do Estado do Rio de Janeiro programa de Carcinogênese molecular Instituto Nacional de Cancer Laboratório de Toxicologia e Biologia molecular Universidade do Estado do Rio de Janeiro Servi?o de Gastroenterologia Departamento de Clínica MédicaUniversidade Federal do Rio de Janeiro

AIm: To analyze the prevalence of thiopurine-methyltransferase (TpmT) genotypes and their association with drug toxicity in inflammatory bowel disease (IBD) patients from southeastern Brazil.

关键词： Inflammatory bowel disease Thiopurine-methyl-transferase Azathioprine Drug toxicity pancreatitis

multiple radial phosphorus segregations in GaAsp core-shell nanowires

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2021年第1期14卷 157-164页

作者： H.Aruni Fonseka Yunyan Zhang James A.Gott Richard Beanland Huiyun Liu ana m.Sanchez Department of physics University of WarwickCoventry CV47ALUK Department of Electronic and Electrical Engineering University College LondonLondon WC1E 7JEUK

Highly faceted geometries such as nanowires are prone toform self-formed features,especially those that are driven by *** these features is important in preventing their formation,understanding their effects on nanowire properties,or engineering them for *** elemental segregation lines that run along the radii of the hexagonal cross-section have been a common observation in alloy semiconductor ***,in GaAsp nanowires,two additional p rich bands are formed on either side of the primary band,resulting in a total of three segregation bands in the vicinity of three of the alternating *** bands are less intense than the primary band and their formation can be attributed to the inclined nanofacets that form in the vicinity of the *** formation of the secondary bands requires a higher composition of p in the shell,and to be grown under conditions that increase the diffusivity difference between As and ***,it is observed that the primary band can split into two narrow and parallel *** can take place in all six radii,making the cross sections to have up to a maximum of 18 radial segregation *** controlled growth,these features could be exploited to assemble multiple different quantum structures in a new dimension(circumferential direction)within nanowires.

关键词： compound semiconductor alloys radial segregations three-fold symmetry surface chemical potential

modeling of biodiesel production: performance comparison of Box–Behnken, face central composite and full factorial design

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2019年第7期27卷 1690-1698页

作者： Vlada B.Veljkovic ana V. Velickovic Jelena m. Avramovic Olivera S. Stamenkovic University of Nis Faculty of TechnologyBulevar oslobodenja 124Leskovac 16000Serbia Research&Development Center "Alfatec" Bulevar Nikole Tesle 63/5Nis 18000Serbia

The performances of the response surface methodology(RSm)in connection with the Box–Behnken,face central composite or full factorial design(BBD,FCCD or FFD,respectively)were compared for the use in modeling of the NaOH-catalyzed sunflower oil *** influence of temperature,catalyst loading,and ethanol-to-oil molar ratio(EOmR)on fatty acid ethyl esters(FAEE)content was *** three multivariate strategies were efficient in the statistical modeling and optimization of the influential process variables but BBD and FCCD realization involved less number of experiments,generating smaller costs,requiring less work and consuming shorter time than the corresponding *** three designs resulted in the same optimal catalyst loading(1.25%of oil)and EOmR(12:1).The reduced two-factorinteraction(2 FI)models based on the BBD and FCCD defined a range of optimal reaction temperature(25℃–75℃)and 25℃,respectively while the same model based on the 33 FFD appointed 75℃.The predicted FAEE content of about 97%–98.0%was close to the experimentally obtained FAEE content of about 97.0%–97.6%under the optimal reaction ***,the simpler BBD or FCCD might successfully be applied for statistical modeling of biodiesel production processes instead of the more extensive,more laborious and more expensive FFD.

关键词： Biodiesel Box-Behnken design model reduction Face central composite design Full factorial design Optimization