检索结果-南通市图书馆

Transcatheter aortic valve implantation： a revolution in the therapy of elderly and high-risk patients with severe aortic stenosis

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

Journal of Geriatric Cardiology 2017年第3期14卷 204-217页

作者： teoman Kilic Irem Yilmaz Invasive Cardiology Research and Application Unit Department of Cardiology Kocaeli University Kocaeli Turkey Department of Cardiology Kocaeli University Kocaeli Turkey

Transcatheter aortic valve implantation （TAV1） represents a real revolution in the field of interventional cardiology for the treatment of elderly or high-risk surgical patients with severe symptomatic aortic valve stenosis. Today, TAVI seems to play a key and a reliable role in the treatment of intermediate and maybe low-risk patients with severe aortic stenosis. TAVI has also evolved from a complex and hazardous procedure into an effective and safe therapy by the development of new generation devices. This article aims to review the background and future of TAVI, elinieal trials and registries with old and new generation TAVI devices and to focus on some open issues related to post-procedural outcomes.

关键词： High risk patients The elderly Transcatheter aortic valve implantation

Changes in carbon stocks of soil and forest floor in black pine plantations in Turkey

在线全文

学校读者我要写书评

暂无评论

Journal of Forestry Research 2021年第1期32卷 339-347页

作者： Sükrüteoman Güner Dilek Güner General Directorate of Forestry Research Institute for Forest Soil and Ecology26160 EskisehirTurkey

The objectives of this study were:(1)to determine carbon stock changes in the soil and forest floor of black pine(Pinus nigra ***)plantations in Turkey;(2)to determine the effects of thinning on annual carbon accumulation in both;and,(3)to investigate relationships between annual carbon storage in soil and forest floor and stand characteristics of black *** were taken in 90 plots from stands at the pole(dbh=11.0–19.9 cm)and sawlog(dbh=20.0–35.9 cm)*** analyses of soil and forest floor samples showed that in unthinned plantations signifi cant organic carbon was sequestered an average of 1.47 Mg ha^−1 a^−1 in the soil and 0.20 Mg ha^−1 a^−1 in the forest *** carbon sequestered annually in the soil was signifi cantly lower in thinned than in unthinned stands,while diff erences in the forest floor were insignifi *** were positive correlations between carbon sequestered in the soil and stand age,average DBH,mean stand height,basal area,and site *** sequestered the forest floor increased with basal *** a result,carbon sequestered in the soil should not be ignored in greenhouse gas inventories because carbon stored belowground was approximately 70%of the aboveground pool.

关键词： Pinus nigra Belowground Forest floor Carbon sequestration Thinning

Diameter distributions in Pinus sylvestris ***:evaluating modelling approaches including a machine learning technique

在线全文

学校读者我要写书评

暂无评论

Journal of Forestry Research 2023年第6期34卷 1829-1842页

作者： Şükrü teoman Güner Maria J.Diamantopoulou Ramazan Özçelik Department of Forestry Ulus Vocational SchoolBartın University74600 UlusBartınTurkey Faculty of Agriculture Forestry and Natural EnvironmentSchool of Forestry and Natural EnvironmentAristotle University of Thessaloniki54124 ThessalonikiGreece Faculty of Forestry Isparta University of Applied ScienceEast Campus32260 IspartaTurkey

The diameter distribution of trees in a stand provides the basis for determining the stand’s ecological and economic value,its structure and stability and appropriate management *** pine(Pinus sylvestris L.)is one of the most common and important conifers in Turkey,so a well-planned management schedule is *** distribution models to accurately describe the stand structure help improve management strategies,but developing reliable models requires a deep understanding of the growth,output and constraints of the *** most important information derived by diameter distribution models is primary data on horizontal stand structure for each diameter class of trees:basal area and volume per unit *** predictions are required to estimate the range of products and predicted volume and yield from a forest ***,to construct an accurate,reliable diameter distribution model for natural Scots pine stands in the Türkmen Mountain region,we used Johnson’s SBdistribution to represent the empirical diameter distributions of the stands using ground-based measurements from 55 sample plots that included1219 trees in natural distribution zones of the *** an alternative,nonparametric approach,which does not require any predefined function,an artificial intelligence model was constructed based on support vector machine *** error index was calculated to evaluate the ***,both Johnson’s SB probability density function with a three-parameter recovery approach and the support vector regression methodology provided reliable estimates of the diameter distribution of these stands.

关键词： Diameter distribution Johnson’s S_(B) Support vector regression Scots pine Türkmen mountains

Modelling the site index of Pinus pinaster plantations in Turkey using ecological variables

在线全文

学校读者我要写书评

暂无评论

Journal of Forestry Research 2021年第2期32卷 589-598页

作者： Cezmi Özel Şükrüteoman Güner Mehmet Türkkan Selda Akgül Özdemir Şentürk Research Institute for Forest Soil and Ecology EskisehirTurkey Southwest Anatolian Forest Research Institute AntalyaTurkey Poplar and Fast Growing Forest Trees Research Institute KocaeliTurkey Gölhisar Vocational School Burdur Mehmet Akif Ersoy UniversityBurdurTurkey

The determination of site productivity in forest ecosystems plays a crucial role in resource *** study was carried out to identify relationships between site characteristics and height growth of Corsican maritime pine(Pinus pinaster Ait.)plantations in ***-nine sample plots>20 years of age were selected from locations with different inclinations,aspects,elevations,slope positions and site *** samples were taken at various *** and age were measured on a dominant tree after felling in each *** and chemical properties of the soil were *** between site index(SI 25)and physiographic factors,climatic attributes as well as soil properties were evaluated using correlation analysis and multiple regression *** index was significantly related with annual precipitation,mean spring rainfall,rainfall June to September,rainfall of the driest month,length of the dry period,mean maximum temperature,mean temperature of the warmest month,stoniness of the soil,sand,silt,clay,pH,electrical conductivity,and available water *** regression accounted for 57.9%of variations in height *** models obtained can be used to determine the site index of potential areas in Turkey for maritime *** can be said that the productivity of maritime pine may decline in the future due to global climate change.

关键词： Pinus pinaster Afforestation Ecology Site index

A Cytogenetic Study on Spermophilus Xanthoprymnus(Bennett,1835)in Isparta Province

在线全文

学校读者我要写书评

暂无评论

Research in Ecology 2021年第2期3卷 1-4页

作者： Şengül AKSAN KuyaşHEKİMLERÖZTÜRK teoman KANKILIÇ Department of Wildlife Ecology and Management Faculty of ForestryIsparta University of Applied SciencesIspartaTurkey Department of Medical Genetics School of MedicineSüleyman Demirel UniversityIspartaTurkey Department of Biotechnology Faculty of Science and LettersNigde Omer Halisdemir UniversityNigdeTurkey

This study was conducted to explain the karyological characteristics of *** from Gencali in *** chromosomes of the specimens were traditionally stained and examined according to standard *** chromosomes were determined according to centromere positions by examining the photographs of metaphase *** karyotype of *** contained 42 chromosomes(2n=42)and fundamental number of chromosomal arms NF=81 and the number of autosomal arms NFa=*** karyotype includes four metacentric chromosomes ranging from large to small,three pairs of large and medium-sized submetacentric autosome,twelve ranging from large to medium size subtelocentric,and a pair of acrocentric *** X chromosome was determined as large subtelocentric and Y chromosome as small *** to there is no karyological information and geographical distribution of existentence cytotypes in Turkey,revelation of chromosomal structure in Anatolian ground squirrel populations will provide properly assessment of taxonomy of those rodents in further studies.

关键词： Spermophilus xanthoprymnus Isparta Karyotype

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

埋设管道抗震分析的新发展

世界地震工程 1982年第2期 1-5页

作者： teoman Ariman Gregory E.Muleski 梁传珏

引言众所周知,对不同类型的结构体系在地震作用下的性能曾做过许多工作,以研究建筑物和其他地面上的结构物的设计准则。然而,对城市地区的生活来说,至关重要的一个主要结构系统(例如生命线系统),还没有引起足够的重视。天然气和石油管... 详细信息

引言众所周知,对不同类型的结构体系在地震作用下的性能曾做过许多工作,以研究建筑物和其他地面上的结构物的设计准则。然而,对城市地区的生活来说,至关重要的一个主要结构系统(例如生命线系统),还没有引起足够的重视。天然气和石油管道、自来水和污水管道、煤气和石油储

关键词：抗震分析结构分析位移幅值埋设管道地下管道系统抗震性能土壤刚度地震波轴向变形地面运动地壳运动管道轴