检索结果-南通市图书馆

物理化学学报 2018年第6期34卷 683-691页

作者： FRANCO-p.rez Marco GáZQUEZ josé L. AYERS paul W. VELA Alberto Departamento de Quimica Universidad Aut6noma Metropolitana-Iztapalapa Av. San Rafael Atlixco 186 Ciudad de Mexico 09340 Mexico. Department of Chemistry McMaster University Hamilton Ontario L8S 4M1 Canada. Departamento de Quimica Centro

A new definition of the dual descriptor,namely,thethermodynamic dual descriptor,is developed within the grand canonicalpotential *** new definition is formulated to describe the same △f_r(r)=β/2C[f^+(r)-f^-(r)](C>0) physical phenomenon as the original definition proposed by Morell,Grand,and Toro-Labbé(***.A2005,109,205),which is characterized by a second-order response of the electron density towards an electron *** formulate the new definition,we performed two successive partial derivatives of the average electron density,one with respect to the average number of electrons,and the other with respect to the chemical potential of the electron *** the derivative is expressed in terms of the three-state ensemble model,in the regime of low temperatures up to temperatures of chemical interest,one finds that the thermodynamic dual descriptor can be expressed as?f_T(r)=(β/2)C[f^+(r)-f^-(r)],whereβ=1/k_BT,Cis a global quantity that depends on the temperature and global electronic properties of the molecule(the first ionization potential and the electron affinity),C=1 for systems with zero fractional charge,and C=C_ω>0(albeit very close to zero)for systems with nonzero fractional charge,,and f^+(r)and f^-(r)are the nucleophilic and electrophilic Fukui functions,*** quantity within the square brackets is the original definition of the dual *** the local terms(the ones containing regioselectivity information)are equal to those of the dual descriptor,?f_T(r)has the same regioselectivity information,multiplied by the global quantity(β/2)*** implies that the regioselectivity information contained in the original dual descriptor is preserved at all temperatures different from zero,and for any value of C>*** of the most important features of this new definition is that it avoidsthe undesired Dirac delta behavior observed when the second order partial derivative of the average density is taken with respect to the average

关键词： Dual descriptor Chemical stability Finite temperature chemical reactivity theory Fractional average number of electrons Amphiphilicity

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 Input–Output Ex Ante Regional Model to Assess the Short-Term Net Effects of the 16 April 2016 Earthquake in Ecuador

引用

International Journal of Disaster Risk Science 2021年第4期12卷 510-527页

作者： Jorge Salgado joséRamírez-Álvarez Diego Mancheno Faculty of Economics Pontificia Universidad Católica del Ecuador17012184QuitoPichinchaEcuador

The 16 April 2016 earthquake in Ecuador exposed the significant weaknesses concerning the methodological designs to compute—from an economic standpoint—the consequences of a natural hazard-related disaster for productive exchanges and the accumulation of capital in *** study addressed one of these challenges with an innovative ex ante model to measure the partial and net short-term effects of a natural hazard-related catastrophe from an interregional perspective,with the 16 April 2016 earthquake serving as a case *** general,the specified and estimated model follows the approach of the extended Miyazawa model,which endogenizes consumption demand in a standard input–output model with the subnational interrelations and resulting *** to the country’s limitations in its regional account records the input–output matrices for each province of Ecuador had to be estimated,which then allowed transactions carried out between any two sectors within or outside a given province to be identified by means of the RAS *** estimations provide evidence that the net short-term impact on the national accounts was not significant,and under some of the simulated scenarios,based on the official information with respect to earthquake management,the impact may even have had a positive effect on the growth of the national product during 2016.

关键词： Earthquake impact Ecuador Input–output RAS method Regional model

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

Climate-driven variations in productivity reveal adaptive strategies in Iberian cork oak agroforestry systems

引用

Forest Ecosystems 2022年第1期9卷 83-93页

作者： josé Carlos p.rez-Girón Emilio Rafael Díaz-Varela pedro Álvarez-Álvarez Department of Organisms and Systems Biology Polytechnic School of MieresUniversity of OviedoE-33600MieresAsturiasSpain Research Group on planning and Management in Complex Adaptive Socio-Ecological Systems(COMpASSES).School of Engineering University of Santiago de CompostelaE-27002LugoSpain

Background:Cork oak agroforestry systems(AFS)have been managed for centuries by humans to produce cork and other goods and services and have recently been recognised as an important reservoir for biodiversity improvement and ***,despite having recently been included as a natural habitat of community-wide interest within the EU Habitats Directive,these systems are in a critical situation of *** other factors,they are strongly threatened by climate change,the effects of which are also expected to be particularly severe in the Mediterranean *** this study,we aimed to evaluate the influence of climate variability by examining primary production indicators and also to analyse whether the geographical location may have a role in the incidence of the adverse effects of ***:Cork oak AFS were identified in the Forest Map of Spain and the Land use map of portugal and categorized on the basis of canopy *** climate data from 2001 to 2020 were used to model relationships with climate predictors and proximity to the *** analysis was conducted to identify significant spatial clusters of high-and low-efficiency ***:The responses to the influence of climatic conditions differed among the various cork oak AFS categories,particularly in the forest category,which was less dependent on climate *** humidity and water availability were the main drivers of net primary production(Npp).Carbon use efficiency(CUE)was limited by relative humidity and spring temperature in open *** to the coast proved beneficial,especially in years with adverse weather conditions,but was not a limiting factor for survival of the ***,the results of the hotspot analysis supported the other findings,highlighting high-efficiency areas close to the coast and cold spots grouped in specific areas or dispersed ***:Canopy plays a key role in the influence of climatic conditions,particu

关键词： Net primary production Carbon use efficiency Climate Quercus suber Agroforestry system

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

Evaluation of Mandibular Deprogramming Using TENS (Transcutaneous Electrical Nerve Stimulation) in patients at the Specialty Clinic of the Juarez Autonomous University of Tabasco from 2022 to 2024

引用

Journal of Biosciences and Medicines 2024年第7期12卷 245-251页

作者： Christian C. Aguilar-Caamal Landy V. Limonchi-palacio Crystell G. Guzmán-priego Jeannette Ramírez-Mendoza josé M. Lehmann-Mendoza Miguel A. López-Alvarado Xavier E. Moreno-Enriquez Jorda A. Albarrán-Melzer Academic Division of Health Sciences Juarez Autonomous University of Tabasco Villahermosa Tabasco Mxico Cardiometabolism Laboratory Academic Division of Health Sciences Juarez Autonomous University of Tabasco Villahermosa Tabasco Mxico

Temporomandibular disorders (TMD) negatively affect quality of life, causing pain and restricted jaw movements. This study evaluates the effectiveness of Transcutaneous Electrical Nerve Stimulation (TENS) on TMD patients before orthodontic treatment at the Juarez Autonomous University of Tabasco. A quantitative, quasi-experimental study was conducted with 30 patients who met the inclusion criteria: aged 18 to 65 years, with TMJ pain symptoms, diagnosed with temporomandibular disorders using the Helkimo index, and who had provided informed consent for the study. The range of mandibular movement and the Visual Analog Scale (VAS) were measured to record values before therapy. The electrodes of the TENS therapy were positioned on both sides of the jaw in the preauricular area and the masseter muscle, the therapy was administered for 40 minutes, utilizing a frequency of 2 - 4 Hz and a pulse duration of 300 microseconds. Following this, the range of mandibular movement and the VAS were reassessed to evaluate the outcomes., significantly improved maximum mouth opening (37.7 ± 6.4 mm to 44.6 ± 5.88 mm), right laterality (3.86 ± 1.57 mm to 5.43 ± 1.21 mm), left laterality (3.13 ± 1.63 mm to 4.53 ± 1.61 mm), protrusion (4.01 ± 1.7 mm to 5.36 ± 1.32 mm), and pain perception (4.56 ± 2.045 to 2.03 ± 1.5) (p py enhances mandibular movement and reduces pain, making it a well-tolerated, non-invasive complementary treatment for TMD.

关键词： TENS Opening Deprogramming Electrostimulation TMJ (Temporomandibular Joint)

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

Laparoscopic gastrojejunostomy for gastric outlet obstruction in patients with unresectable hepatopancreatobiliary cancers: A personal series and systematic review of the literature

引用

World Journal of Gastroenterology 2018年第18期24卷 1978-1988页

作者： Alba Manuel-Vázquez Raquel Latorre-Fragua Carmen Ramiro-p.rez Aylhin López-Marcano roberto De la plaza-Llamas josé Manuel Ramia Department of General and Digestive Surgery University Hospital of Guadalajara

The major symptoms of advanced hepatopancreaticbiliary cancer are biliary obstruction, pain and gastric outlet obstruction(GOO). For obstructive jaundice, surgical treatment should de consider in recurrent stent complications. The role of surgery for pain relief is marginal nowadays. On the last, there is no consensus for treatment of malignant GOO. Endoscopic duodenal stents are associated with shorter length of stay and faster relief to oral intake with more recurrent symptoms. Surgical gastrojejunostomy shows better long-term results and lower re-intervention rates, but there are limited data about laparoscopic approach. We performed a systematic review of the literature, according pRISMA guidelines, to search for articles on laparoscopic gastrojejunostomy for malignant GOO treatment. We also report our personal series, from 2009 to 2017. A review of the literature suggests that there is no standardized surgical technique either standardized outcomes to report. Most of the studies are case series, so level of evidence is low. Decisionmaking must consider medical condition, nutritional status, quality of life and life expectancy. Evaluation ofthe patient and multidisciplinary expertise are required to select appropriate approach. Given the limited studies and the difficulty to perform prospective controlled trials, no study can answer all the complexities of malignant GOO and more outcome data is needed.

关键词： Duodenal obstruction Gastrojejunostomy Gastroenterosmy Gastric outlet obstruction Gastric bypass Laparoscopy Laparoscopic surgery Sytematic review

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

Sticky-MARTINI as a reactive coarse-grained model for molecular dynamics simulations of silica polymerization

引用

npj Computational Materials 2022年第1期8卷 467-479页

作者： Andrép.Carvalho Sérgio M.Santos Germán p.rez-Sánchez joséD.Gouveia joséR.B.Gomes Miguel Jorge CICECO-Aveiro Institute of Materials Department of ChemistryUniversity of AveiroCampus Universitário de Santiago3810-193AveiroPortugal Department of Chemical and process Engineering University of Strathclyde75 Montrose StreetGlasgowG11XJUK

We report a molecular modeling paradigm to describe silica polymerization reactions in aqueous solutions at conditions that are representative of realistic experimental processes like biosilicification or porous silica synthesis–*** close to ambient temperatures and over a wide range of *** key point is to describe the Si-O-Si chemical bond formation and breakage processes through a continuous potential with a balance between attractive and repulsive interactions between suitably placed virtual sites and sticky *** simplicity of the model,its applicability in standard parallelized molecular dynamics codes,and its compatibility with the widely used MARTINI coarse-grained force-field allows for the study of systems containing millions of atoms over microsecond time *** model is calibrated to match experimental results for the temporal evolution of silica polymerization in aqueous solution close to the isoelectric point,and can describe silica polymerization and self-assembly processes during encapsulation of a surfactant micelle.

关键词： silica polymerization dynamics

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

Seed provenance determines germination responses of Rumex crispus (L.) under water stress and nutrient availability

引用

Journal of plant Ecology 2019年第6期12卷 949-961页

作者： María p.rez-Fernández Carole pElliott Alex Valentine joséAntonio Oyola Ecology Area University Pablo de OlavideCarretera de Utrera Km 141013 SevillaSpain Kings park Science Botanic Garden and Parks AuthorityDepartment of BiodiversityConservation and AttractionsKattidj CloseKings ParkWA 6005Australia School of Biological Science The University of Western AustraliaCrawleyWA 6009Australia Department of Botany and Zoology Stellenbosch UniversityPrivate Bag X1Matieland 7602South Africa physics Department University of ExtremaduraAvenida de Elvas s/n06006 BadajozSpain

Aims Seeds of Rumex crispus from six provenances were studied in relation to their germination under drought and presence of nitrogen in the germination and emergence *** also investigated whether adaptation to soil increases the ability of the species to colonize and establish in contrasting environments along a longitudinal gradient in western Spain by means of a reciprocal transplantation *** We conducted a germination trial in the lab to test for the germination responses to water scarcity along a polyethylene glycol gradient and to varying concentrations of nitrogen *** reciprocal transplantations experiment was conducted,where seeds from six provenances were grown in the soils from the very same *** emergence,survivorship and fitness-related variables were measured in all *** Findings We found that *** has a cold-stratification requirement that enhances its *** differences between the six provenances were detected for time-to-germination,total seedling emergence,plant mortality and reproductive effort in all the *** differences between provenances with respect to germination were confirmed by the significant statistical analyses of the variance,thus providing evidence that seeds from parent plants grown in different environmental conditions have an intrinsically different abilities to germinate and *** nitrogen content where seed germination and seedlings establish also play an important role in their performance in terms of survivorship and reproduction,being the higher levels of inorganic nitrogen and of microbial biomass those that increased biomass production,enhanced inflorescence formation and reduced plant *** conclude that one of the main reasons for the spread and maintenance of *** would be the increased levels of nitrogen in agricultural soils.

关键词： seed provenance germination latitudinal gradient drought N-compounds soil properties

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

Relation of atrophic gastritis with Helicobacter pylori-CagA^+ and interleukin-1 gene polymorphisms

引用

World Journal of Gastroenterology 2008年第42期14卷 6481-6487页

作者： Rafaela Sierra Clas Une Vanessa Ramírez Warner Alpízar-Alpízar María I González josé A Ramírez Antoine de Mascarel patricia Cuenca Guillermo p.rez-p.rez Francis Mégraud Institute of Health Research University of Costa Rica San José 2060 Costa Rica Department of Statistics University of Costa Rica San José 2060 Costa Rica Department of pathology Calderón Guardia Hospital Costa Rica San José 2060 Costa Rica University Victor Segalen Bordeaux 2 146 rue Leo-Saignat Case 76 Bordeaux Cedex 33076 France Departments of Medicine and Microbiology New York University School of Medicine NYU. Langone Medical Center 550 First Avenue New York 10016 United States

AIM： To determine the association of Helicobacter pylori （H pylorl） CagA^＋ infection and pro-inflammatory polymorphisms of the genes interleukin （IL）-IRN and IL-1B with the risk of gastric atrophy and peptic ulcers in a dyspeptic population in Costa Rica, a country with high incidence and mortality of gastric cancer. METHODS： Seven biopsy specimens, a fasting blood sample and a questionnaire concerning nutritional and sociodemographic factors were obtained from 501 consecutive patients who had undergone endoscopy for dyspeptic symptoms. A histopathological diagnosis was made. pepsinogen concentrations were analyzed by enzyme linked immunosorbent assay （ELISA）. Infection with H pylori CagA^＋ was determined by serology and polymerase chain reaction （pCR）. IL-1B and IL-1RN polymorphisms genotyping was performed by pCRrestriction fragment length polymorphism （pCR-RFIp）and pCR respectively. RESULTS： In this dyspeptic population, 86% were Hpylori positive and of these, 67.8% were positive for CagA. Atrophic antral gastritis （AAG） was associated with CagA^＋ status [odd ratio （OR） = 4.1; p 〈 0.000] and fruit consumption （OR = 0.3; p 〈 0.00）. Atrophic body gastritis （ABG） was associated with pepsinogen pGI/pGII 〈 3.4 （OR = 4.9; p 〈 0.04） and alcohol consumption （OR = 7.3; p 〈 0.02）. Duodenal ulcer was associated with CagA^＋（OR = 2.9; p 〈 0.04） and smoking （OR = 2.4; p 〈 0.04）. pGI 〈 60 μg/L as well as pGI/pGII 〈 3.4 were associated with CagA^＋. CONCLUSION： In a dyspeptic population in Costa Rica, H pylori CagA^＋ is not associated with ABG, but it is a risk factor for AAG. The pro-inflammatory cytokine poly- morphisms IL-1B ＋ 3945 and IL-1RN are not associated with the atrophic lesions of this dyspeptic population.

关键词： Atrophic gastritis pepsinogen pepticulcers Helicobacterpylori-CagA Interleukins

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

physical exercises for preventing injuries among adult male football players:A systematic review

引用

Journal of Sport and Health Science 2022年第1期11卷 115-122页

作者： Jorge p.rez-Gómez joséCarmelo Adsuar pedro EAlcaraz Jorge Carlos-Vivas Health EconomyMotricity and Education(HEME)Research GroupFaculty of Sports SciencesUniversity of ExtremaduraCaceres 10003Spain UCAM Research Center for High performance Sport Catholic University of MurciaMurcia 30107Spain Faculty of Sport Sciences Catholic University of MurciaMurcia 30107Spain

Background:Football is the most practised sport in the world and is associated with the risk of injuries in the *** studies have been published that identify injury prevention programs,but there is no review of the full body of evidence on injury prevention programs for use by football *** aim of this article was to carry out a systematic review of published studies on injury prevention programs for adult male footballers,identify points of common understanding and establish recommendations that should be considered in the design of injury prevention ***:pubMed and EMBASE databases were used to identify relevant published articles using the following keywords:"soccer"AND"injury"AND"prevention".Results:A total of 2512 studies were identified initially,but only 11 studies met the inclusion criteria,and their outcomes are *** revealed that injury prevention programs in football have focused on strength training,proprioceptive training,multicomponent programs(balance,core stability,and functional strength and mobility),and warm-up ***:Based on results from the studies analyzed,football players can lower the incidence of match and training injuries by participating in dynamic warm-up programs that include preventive exercises before games or during training sessions,and by adding strength,balance,and mobility training to the training sessions.

关键词： Balance Core stability Injury prevention programs Soccer Warm-up

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

Bayesian regularized quantile regression:A robust alternative for genome-based prediction of skewed data

引用

The Crop Journal 2020年第5期8卷 713-722页

作者： paulino p.rez-Rodríguez Osval A.Montesinos-López Abelardo Montesinos-López joséCross Colegio de postgraduados MontecillosEdo.de México 56230Mexico Facultad de Telemática Universidad de ColimaColima 28040Mexico Departamento de Matemáticas Centro Universitario de Ciencias Exactas e Ingenierías(CUCEI)Universidad de GuadalajaraGuadalajaraJalisco 44430Mexico International Maize and Wheat Improvement Center(CIMMYT) Km 45 Carretera México-VeracruzTexcocoEdo.de México 56237Mexico

Genomic prediction(Gp)has become a valuable tool for predicting the performance of selection candidates for the next breeding cycle.A vast majority of statistical linear models on which Gp is based rely on the assumption of normality of the residuals and therefore on the response variable *** this study,we propose to use Bayesian regularized quantile regression(BRQR)in the context of Gp;the model has been successfully used in other research *** evaluated the prediction ability of the proposed model and compared it with the Bayesian ridge regression(BRR;equivalent to genomic best linear unbiased predictor,GBLUp).In addition,BLUp can be used with pedigree information obtained from the coefficient of coancestry(ABLUp).We have found that the prediction ability of BRQR is comparable to that of BRR and,in some cases,better;it also has the potential to efficiently deal with outliers.A program written in the R statistical package is available as Supplementary material.

关键词： Laplace distribution Robust regression Bayesian quantile regression Genomic-enabled prediction

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：