检索结果-南通市图书馆

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

预防性植入合成补片在腹腔镜造口术中的应用

中国实用外科杂志 2011年第8期31卷 748-751页

作者： Janson ar Janes A Israelsson LA Department of Surgery Kirurgkliniken Sundsvallssjukhus 851 86 Sundsvall Sweden Department of Surgery andPerioperative Science Umea° University Umea° Sweden

目的探究腹腔镜造口术中预防性应用补片的效果。方法将腹腔镜乙状结肠造口术中预防性地在腹膜外植入大孔径、轻量型补片的病例纳入研究。术后随访至少12个月。结果 2003-2007年共有25例病人接受了乙状结肠造口术。平均年龄为65(31～89)... 详细信息

目的探究腹腔镜造口术中预防性应用补片的效果。方法将腹腔镜乙状结肠造口术中预防性地在腹膜外植入大孔径、轻量型补片的病例纳入研究。术后随访至少12个月。结果 2003-2007年共有25例病人接受了乙状结肠造口术。平均年龄为65(31～89)岁,BMI平均为26(21～32),其中15例为女性。术后1例病人发生造口坏死,2例发生轻度切口感染。在所有接受随访的20例中(平均随访时间19个月,11～31个月),有3例(15%)发生了造口旁疝。无术后瘘管形成和造口狭窄,也未发生补片感染和再次手术移除补片的情况。结论在腹腔镜造口术中预防性地在腹膜外植入大网孔、轻量型补片是简单安全的操作,并且能有效降低术后造口旁疝的发生率。

关键词：腹腔镜造口术乙状结肠造口术造口旁疝腹壁疝

Camera traps reveal the natural corridors used by mammalian species in eastern Mexico

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

Ecological Processes 2022年第1期11卷 711-722页

作者： Jonathan O.Huerta‑Rodríguez Octavio C.Rosas‑Rosas Lauro López‑Mata JoséL.Alcántara‑Carbajal Luis A.Tarango‑arámbula Programa de Recursos Genéticos y Productividad‑Ganadería Colegio de Post‑graduadosCampus MontecilloTexcocoMexico Programa de Innovación en Manejo de Recursos Naturales Colegio de PostgraduadosCampus San Luis PotosíSan Luis PotosíMexico Programa de Dinámica y Conservación de Bosques y Selvas Macroecología y BiodiversidadColegio de PostgraduadosCampus MontecilloTexcocoMexico

Background:Habitat loss and fragmentation in the Sierra Madre Oriental(SMO)ecological corridor have negative impacts on the movement and distribution of mammalian species that are of great ecological and evolutionary *** of the SMO ecological corridor that is located in the state of Hidalgo is less studied despite being a potential dispersal route for *** objectives of this study were to evaluate the presence and activity of terrestrial mammals in the riparian and non‑riparian zones of ***:Camera traps detected 15 mammalian species(i.e.,14 native and 1 domestic)in the non‑riparian zone,and 12 mammalian species in the riparian zone(i.e.,10 wild and 2 domestic).The riparian corridor was mainly used by opportunistic medium‑sized carnivores,while large carnivores and their potential prey were more frequent in the non‑riparian ***:Our findings suggest terrestrial mammals avoid the use of natural corridors due to the presence of domestic dogs,cattle and humans and look for new dispersal routes to move through their habitat and find the resources they need to *** though some species can use disturbed corridors to move and find resources,they will change their activity patterns to avoid contact with humans and potential threats like *** is,therefore,crucial to identify not one,but several corridors that must be preserved to improve the connectivity of terrestrial mammals in disturbed landscapes.

关键词： Activity Jaguar Cattle Detectability Dog Herbivore Disturbance Prey Relative abundance

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

疟原虫“阻塞”的分子机制

国外医学（寄生虫病分册） 1995年第3期22卷 107-109页

作者： Berendt ar 杨洪

本文综述了宿主细胞表面结构与疟原虫的相互作用,以及导致细胞粘附及原虫在微血管内发生阻塞现象的分子机制。

关键词：疟原虫宿主细胞表面结构细胞粘附

Corpus callosum in schizophrenia with deficit and non-deficit syndrome:a statistical shape analysis

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

General Psychiatry 2021年第6期34卷 42-48页

作者： Yaşar Türk Ilker Ercan Ibrahim Sahin Basak Erdemli Gursel arda Uzunoglu CemÖge Elmas Beyazyüz Yakup Albayrak Department of Radiology Medical Faculty of Bülent Ecevit UniversityKozluZonguldakTurkey Department of Biostatistics Bursa Uludag University Faculty of MedicineBursaTurkey Department of Radiology Bursa Uludag University Faculty of MedicineBursaTurkey Department of Psychiatry Çorlu State HospitalÇorluTurkey Department of Psychiatry Medical Faculty of Tekirdag Namık Kemal UniversityTekirdagTurkey

Background The corpus callosum(CC)is the most targeted region in the cerebrum that integrates cognitive data between homologous areas in the right and left *** Our study used statistical analysis to determine whether there was a correlation between shape changes in the CC in patients with schizophrenia(SZ)(deficit syndrome(DS)and non-deficit syndrome(NDS))and healthy control(HC)*** This study consisted of 27 HC subjects and 50 schizophrenic patients(20 with DS and 30 with NDS).3 patients with DS and 4 patients with NDS were ***-dimensional,sagittal,T1-spoiled,gradient-echo imaging was *** anatomical landmarks were selected and marked on each image using specific *** As to comparing the Procrustes mean shapes of the CC,statistically significant differences were observed between HC and SZ(DS+NDS)(p=0.017,James’s Fj=73.732),HC and DS(pariability in the form of CC was 0.131,0.085,0.082 and 0.086 in the HC,SZ(DS+NDS),DS and NDS groups,*** This study reveals callosal shape variations in patients with SZ and their DS and NDS subgroups that take into account the CC’s topographic distribution.

关键词： schizophrenia shape analysis

ApoB-100, ApoE and CYP7A1 gene polymorphisms in Mexican patients with cholesterol gallstone disease

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 2010年第37期16卷 4685-4690页

作者： Sánchez-Cuén Jaime Aguilar-Medina Maribel arámbula-Meraz Eliakym Romero-Navarro José Granados Julio Sicairos-Medina Laura Ramos-Payán Rosalío División de Gastroenterología Hospital Regional ISSSTE Facultad de Ciencias Químico Biológicas Doctorado en Biotecnología y Maestría en Ciencias Biomédicas Universidad Autónoma de Sinaloa División de Inmunogenética Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán

AIM: To determine the possible association of the ApoB100 (Xba Ⅰ ), ApoE (Hha Ⅰ ) and CYP7A1 (Bsa Ⅰ ) gene polymorphisms, with the development of cholesterol gallstone disease (GD) in a Mexican population. METHODS: The polymorphisms were analyzed by polymerase chain reaction followed by restriction fragment length polymorphism, in two groups matched by ethnicity, age and sex: patients with GD (n = 101) and stone-free control subjects (n = 101). RESULTS: Allelic frequencies in patients and controls were: 34.16% vs 41.58% (P = 0.124) for X+of ApoB-100; 4.46% vs 5.94% (P = 0.501) for E2, 85.64% vs 78.22% (P = 0.052) for E3, 9.90% vs 15.84% (P = 0.075) for E4 of ApoE; and 25.74% vs 27.72% (P = 0.653) for C of CYP7A1. Differences in genotypic frequencies between the studied groups were not significant (P strated that no association exists between the studied polymorphisms and cholelithiasis in this high prevalent population.

关键词： Apolipoprotein CYP7A1 Gallstones Mexicans Polymorphisms

Thermal Comfort Zone for Thai People

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Engineering（科研） 2013年第5期5卷 525-529页

作者： Juntakan Taweekun ar-U-Wat Tantiwichien Department of Mechanical Engineering Faculty of Engineering Prince of Songkla University Hat Yai Songkhla Thailand

Radiant cooling system for thermal comfort of Thai people was developed. Questionnaires for subjective experiments were examined for development of radiant cooling system for thermal comfort. Thermal sensation, humid sensation and air movement sensation were used for thermal comfort assessment. The Predicted Mean Vote (PMV) value was used for thermal comfort evaluation and it was observed that the PMV values are in the comfortable ranges during 18:00 to 10:00 for air velocity 0.2 m/s and 0.4 m/s. Comfortable periods are extended for higher air velocity. Neutral temperatures are in the ranges of 26.44℃-33.60℃. The percentage number of dissatisfied (PPD) value for each air velocity was also investigate and the value of PPD is five for zero value of PMV. Simulation and experimental results were evaluated by using three indicators, namely, the coefficient of variation (CV), the mean bias error (MBE) and Chi-Square (x2). The values of CV, MBE and (x2) for mean radiant temperature are 14.52%, 1.54% and 3.95℃, respectively. Zones of acceptable thermal environment were developed for Thai People. Results revealed that the comfortable zones of Thai people are in the ranges of relative humidity 50% 70% and effective temperatures (ET) 24℃ 27℃.

关键词： Thermal Comfort Zone Radiant Cooling System Neutral Temperature

Mechanical properties characterization of different types of masonry infill walls

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 structural and Civil Engineering 2020年第2期14卷 411-434页

作者： Andre FURTADO Hugo RODRIGUES Antonio arEDE Humberto VarUM CONstrUCT-LESE Department of Civil EngineeringFaculty of EngineeringUniversity of PortoPorto 4200-465Portugal R1SCO School of Technology and ManagementPolytechnic Institute of LeiriaLeiria 2411-901Portugal

It is remarkable,the recent advances concerning the development of numerical modeling frameworks to simulate the infill panels'seismic ***,there is a lack of experimental data of their mechanical properties,which are of full importance to calibrate the numerical *** primary objective of this paper is to present an extensive experimental campaign of mechanical characterization tests of infill masonry walls made with three different types of masonry units:lightweight vertical hollow concrete blocks and hollow clay *** different types of experimental tests were carried out,namely:compression strength tests,diagonal tensile strength tests,and flexural strength tests parallel and perpendicular to the horizontal bed joints.A total amount of 80 tests were carried out and are reported in the present *** second objective of this study was to compare the mechanical properties of as-built and existing infill *** results presented and discussed herein,will be in terms of strain-stress curves and damages observed within the *** was observed a fragile behavior in the panels made with hollow clay horizontal bricks,without propagation of *** plaster increased the flexural strength by 57%.

关键词： masonry infill walls experimental characterization compression strength shear diagonal strength flexural strength

Equivalent circuit for the characterization of the resonance mode in piezoelectric systems

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 Advanced Dielectrics 2015年第4期5卷 37-41页

作者： Y.Fernández-Afonso O.García-Zaldívar F.Calderón-Piñar Centrode Estudios Avanzadosde Cuba Kilómetro 1y 1/2 Carreter a San Antonio de los Baños Valle Grande La LisaHabanaCuba Facultadde Física-Instituto de Cienciay Tecnología de Materiales Universidad de La Habana.San LázaroyL Vedado.La Habana 10400 Cuba CINVESTAV-Unidad Querétaro Libramiento Norponiente No.2000 Realde Juriquilla QuerétaroQro.76230México

The impedance properties in polarized piezoelectric can be described by electric equivalent *** classic circuit used in the literature to describe real systems is formed by one resistor(R),one inductance(L)and one capacitance C connected in series and one capacity(C_(0))connected in parallel with the ***,the equation that describe the resonance and anti-resonance frequencies depends on a complex manner of R,L,C and C_(0).In this work is proposed a simpler model formed by one inductance(L)and one capacity(C)in series;one capacity(C_(0))in parallel;one resistor(R_(p))in parallel and one resistor(Rs)in series with other *** the traditional circuit,the equivalent circuit elements in the proposed model can be simply determined by knowing the experimental values of the resonance frequency fr,anti-resonance frequency fa,impedance module at resonance frequency|Z|,impedance module at anti-resonance frequency|Za|and low frequency capacitance C_(0),without ftting the im-pedance experimental data to the obtained equation.

关键词： Piezoelectric equivalent circuit electromechanic

Endogenous motion of liver correlates to the severity of portal hypertension

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 2020年第38期26卷 5836-5848页

作者： Sigita Gelman Andrius Sakalauskas Romanas Zykus Andrius Pranculis Rytis Jurkonis Irma Kuliavienė arūnas Lukoševičius Limas Kupčinskas Juozas Kupčinskas Department of Gastroenterology Medical AcademyLithuanian University of Health SciencesKaunas 44307Lithuania Biomedical Engineering Institute Kaunas University of TechnologyKaunas 51423Lithuania Department of Radiology Medical AcademyLithuanian University of Health SciencesKaunas 44307Lithuania Institute for Digestive Research and Department of Gastroenterology Medical AcademyLithuanian University of Health SciencesKaunas 44307Lithuania

BACKGROUND Degree of portal hypertension(PH)is the most important prognostic factor for the decompensation of liver cirrhosis and death,therefore adequate care for patients with liver cirrhosis requires timely detection and evaluation of the presence of clinically significant PH(CSPH)and severe PH(SPH).As the most accurate method for the assessment of PH is an invasive direct measurement of hepatic venous pressure gradient(HVPG),the search for non-invasive methods to diagnose these conditions is actively *** To evaluate the feasibility of parameters of endogenously induced displacements and strain of liver to assess degree of *** Of 36 patients with liver cirrhosis and measured HVPG were included in the casecontrol *** motion of the liver was characterized by derived parameters of region average tissue displacement signal(dantero,dretro,dRMS)and results of endogenous tissue strain imaging using specific radiofrequency signal processing *** endogenous strainμand standard deviationσof strain were assessed in the regions of interest(ROI)(1 cm×1 cm and 2 cm×2 cm in size)and different frequency subbands of endogenous motion(0-10 Hz and 10-20 Hz).RESULTS Four parameters showed statistically significant(Pstrongest correlation was obtained for the standard deviation of strain(estimated at 0-10 Hz and 2 cm×2 cm ROI size).Three parameters showed statistically significant differences between patient groups with CSPH,but only dretro showed significant results in SPH *** to ROC analysis area under the curve(AUC)of theσROI[0…10Hz,2 cm×2 cm]parameter reached 0.71(P=0.036)for the diagnosis of CSPH;with a cut-off value of 1.28μm/cm providing 73%sensitivity and 70%*** for the diagnosis of CSPH forμROI[0…10Hz,1 cm×1 cm]was 0.78(P=0.0024);with a cut-off value of 3.92μm/cm providing 73%sensitivity and 80%*** parameter had an AUC of 0.86(P=0.0001)for the diagnos

关键词： Portal hypertension Endogenous motion strain elastography Hepatic venous pressure gradient Radiofrequency parameters