检索结果-南通市图书馆

应用多重标准评估法和GIS划分南非萨尔达尼亚海湾海岸植被缓冲带

在线全文

学校读者我要写书评

暂无评论

AMBIO－人类环境杂志 2001年第2期30卷 89-95页

作者： johannes H.van der Merwe Gene Lohrentz 石培礼南非斯泰伦博斯大学地理与环境研究系南非斯泰伦博斯大学军事地理系

萨尔达尼亚-郎厄班海岸带是南非海岸资源库的有机组成部分。海岸带作为一个可开发资源的前沿区域,如同世界上其它地区一样,迫切需要平衡发展和经济增长与自然保护之间的关系。保护学上的植被缓冲带和林荫道这两个概念业已成功地应用于... 详细信息

萨尔达尼亚-郎厄班海岸带是南非海岸资源库的有机组成部分。海岸带作为一个可开发资源的前沿区域,如同世界上其它地区一样,迫切需要平衡发展和经济增长与自然保护之间的关系。保护学上的植被缓冲带和林荫道这两个概念业已成功地应用于自然保护实践中,通过将地理信息系统作为空间决策支持系统,将它们应用到研究区,为植被缓冲区划分提供了依据。在本研究中,多重标准评估法将公众决策体现在构建缓冲区划分的客观模型中。感兴趣和受影响团体的代表参与了模型的构建和校准,最终确定了多功能植被缓冲带的空间范围。这样的植被缓冲带与一系列的功能标准相符,可以作为海岸带保护规划框架的一个环境要素。

关键词：多重标准评估法 GIS 南非萨尔达尼亚海湾海岸带植被缓冲带

期刊影响因子的特征：未被引和引证分布对认识期刊影响因子的影响

在线全文

学校读者我要写书评

暂无评论

管理科学学报 2007年第A1期10卷 85-91页

作者： Thed N. van leeuwen Henk F. Moed 任胜利（译）莫京（校） Centre for Science ＆ Technology Studies （CWTS） Leiden University Leiden （The Netherlands））

期刊影响因子在研究中起着核心作用．除了基于2年的时间框架而发展演变为期刊平均影响的影响因子这一重要文献计量指标外，还探讨了其他有关期刊影响力测度的因素．对诸如期刊产出的论文数量、未被引论文的百分比、某特定时间段内引证... 详细信息

期刊影响因子在研究中起着核心作用．除了基于2年的时间框架而发展演变为期刊平均影响的影响因子这一重要文献计量指标外，还探讨了其他有关期刊影响力测度的因素．对诸如期刊产出的论文数量、未被引论文的百分比、某特定时间段内引证频率的分布等进行了研究，并与“传统的”期刊影响因子进行了全面比较．研究结果表明，上述有关期刊影响力测度的因素起着明显作用，并且有很强的相关性．尤其是不同期刊间产出论文数的差异似乎具有重要的实际意义，与基于期刊的影响因子、未被引程度、期刊内容高于或低于影响因子值的份额等方面的不同分析结果所得出的结论相一致．

关键词：期刊内容影响因子引证特征文献计量指标论文数量发展演变实际意义

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

人肝脏可清除不对称性和对称性二甲基精氨酸

世界核心医学期刊文摘（胃肠病学分册） 2005年第7期1卷 36-37页

作者： Siroen M.P.C. van Der Sijp J.R.M. Teerlink T. P.A.M. van leeuwen 杨瑗 VU University Medical Center Department of Surgery PO Box 7057 1007 MB Amsterdam Netherlands Dr.

Asymmetric (ADMA) and symmetric dimethylarginine (SDMA) inhibit production of nitric oxide. The concentration of both dimethylarginines is regulated by urina ry excretion, although ADMA, but not SDMA, is also subject to degradation by dim ethylarginine dimethylaminohydrolase, which is highly expressed in the liver but also present in the kidney. The exact roles of the human liver and kidney in th e metabolism of dimethylarginines are currently unknown. Therefore, we aimed to investigate renal and hepatic handling of ADMA and SDMA in detail in 24 patients undergoing hepatic surgery. To calculate net organ fluxes and fractional extrac tion (FE) rates, blood was collected from an arterial line, the portal vein, hep atic vein, and renal vein, and blood flow of the hepatic artery, portal vein, an d renal vein was determined using Doppler ultrasound techniques. Results showed a significant net uptake (median [IQR]) of ADMA in both the liver (9.6 nmol/min [5.6- 13.2] ) and the kidney (12.1 nmol/min [1.3- 17.1]). SDMA uptake was pres ent not only in the kidney (12.7 nmol/min [3.5- 25.4]), but also in the liver ( 7.7 nmol/min [2.8- 16.4]). FE rates of ADMA for the liver and kidney were 5.0% (3.5% - 7.4% ) and 8.4% (1.3% - 13.9% ), respectively. For SDMA, hepat ic and renal FE rates were 3.4% (2.1% - 7.5% ) and 12.5% (3.6% - 16.2% ), respectively. In conclusion, this study gives a detailed description of the hepatic and renal elimination of dimethylarginines and shows that the clearing o f SDMA is not only confined to the kidney, but the human liver also takes up sub stantial amounts of SDMA from the portal and systemic circulation.

关键词：二甲基精氨酸不对称性尿液排泄肝静脉动脉导管多普勒超声技术肝动脉血液样本血流量肾静脉

描述甲烷在Pt(110)-(21)表面的化学吸附解离的密度泛函评估

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Physics 2021年第6期34卷 883-895,I0004页

作者：卫奋飞 Egidius W.F.Smeets johannes Vossc Geert-Jan Kroes 林森郭华福州大学化学学院能源与环境光催化国家重点实验室福州350002 莱顿大学莱顿化学研究所 Einsteinweg55荷兰莱顿2333CC SLAC国家加速器实验室 SUNCAT界面科学与催化中心美国Menlo Park 94025 新墨西哥大学化学与化学生物学系美国新墨西哥阿尔伯克基87131

本文探讨了几种梯度近似(GGA)密度泛函及元梯度近似(metaGGA)密度泛函在描述甲烷在重构的Pt(110)-(2×1)上的解离化学吸附作用的适用性.金属的体相和表面结构、甲烷的吸附能量和解离能垒等被用来评估泛函的可靠性.另外,在从头算分子动... 详细信息

本文探讨了几种梯度近似(GGA)密度泛函及元梯度近似(metaGGA)密度泛函在描述甲烷在重构的Pt(110)-(2×1)上的解离化学吸附作用的适用性.金属的体相和表面结构、甲烷的吸附能量和解离能垒等被用来评估泛函的可靠性.另外,在从头算分子动力学计算中,采用范德瓦尔斯矫正的GGA函数(optPBE-vdW)和范德瓦尔斯矫正的meta-GGA函数(MS-PBEl-rVV10)计算粘附概率.计算结果表明,使用这两种泛函能更好地与现有的实验结果吻合,从而为发展甲烷在Pt(110)-(2×1)表面解离的可靠机器学习势能面打下重要基础.

关键词：泛函甲烷解离 Pt(110)-(2×1)

在线全文

学校读者我要写书评

暂无评论

多层螺旋CT对颈动脉狭窄分级:目测或尺测

国际医学放射学杂志 2010年第1期 95-96页

作者： A.Waaijer M.Weber M.van leeuwen J.Kardux W.Veldhuis R.Lo 苗苗 University Medical Centre Utrecht Heidelberglaan 1003583 CXUtrechtThe Netherlands

评估颈动脉CT血管成像(CTA)对狭窄进行分级的最佳方法,比较目测与尺测,确定相对于数字减影血管造影(DSA)的观察者间差异及一致性。对46例有症状的颈动脉狭窄病人、55条颈动脉行CTA及DSA。CTA对狭窄的定量使用目测法(CTAVE)(方法1),与主... 详细信息

评估颈动脉CT血管成像(CTA)对狭窄进行分级的最佳方法,比较目测与尺测,确定相对于数字减影血管造影(DSA)的观察者间差异及一致性。对46例有症状的颈动脉狭窄病人、55条颈动脉行CTA及DSA。CTA对狭窄的定量使用目测法(CTAVE)(方法1),与主观最佳宽视窗下的尺测法(方法2)或预设的对比依赖

关键词：颈动脉狭窄 DSA CTA CT

饮食中添加抗氧化剂与年龄相关性黄斑变性患病风险的关系

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

世界核心医学期刊文摘（眼科学分册） 2006年第4期2卷 2-3页

作者： van leeuwen R. Boekhoorn S. Vingerling J.R. P.T.V.M. De Jong 张磊 Dr. Netherlands Ophthalmic Research Institute KNAW Meibergdreef 47 1105 BA Amsterdam Netherlands

Context: Age-related macular degeneration (AMD) is the most prevalent cause of irreversible blindness in developed countries. Recently, high-dose supplementation with beta carotene, vitamins C and E, and zinc was shown to slow the progression of AMD. Objective: To investigate whether regular dietary intake of antioxidants is associated with a lower risk of incident AMD. Design: Dietary intake was assessed at baseline in the Rotterdam Study (1990-1993) using a semiquantitative food frequency questionnaire. Incident AMD until final follow-up in 2004 was determined by grading fundus color transparencies in a masked way according to the International Classification and Grading System. Setting: Population-based cohort of all inhabitants aged 55 years or older in a middle-class suburb of Rotterdam, the Netherlands. Participants: Of 5836 persons at risk of AMD at baseline, 4765 had reliable dietary data and 4170 participated in the follow-up. Main Outcome Measure: Incident AMD, defined as soft distinct drusen with pigment alterations, indistinct or reticular drusen, geographic atrophy, or choroidal neovascularization. Results: Incident AMD occurred in 560 participants after a mean follow-up of 8.0 years (range, 0.3-13.9 years). Dietary intake of both vitamin E and zinc was inversely associated with incident AMD. The hazard ratio (HR) per standard deviation increase of intake for vitamin E was 0.92 (95%confidence interval [CI], 0.84-1.00) and for zinc was 0.91 (95%CI, 0.83-0.98). An above-median intake of all 4 nutrients, beta carotene, vitamin C, vitamin E, and zinc, was associated with a 35%reduced risk (HR, 0.65; 95%CI, 0.46-0.92) of AMD. Exclusion of supplement users did not affect the results. Conclusion: In this study, a high dietary intake of beta carotene, vitamins C and E, and zinc was associated with a substantially reduced risk of AMD in elderly persons.

关键词：年龄相关性黄斑变性患病风险抗氧化剂脉络膜新生血管饮食 β-胡萝卜素玻璃膜疣受试者

视网膜血管直径与散发性老年性黄斑病变发病的危险性:鹿特丹研究

在线全文

学校读者我要写书评

暂无评论

世界核心医学期刊文摘（眼科学分册） 2005年第11期1卷 42-43页

作者： Ikram M.K. van leeuwen R. Vingerling J.R. P.T.V.M. De Jong 张鹏 The Ne therlands Ophthal. Res. Inst. Meibergdreef 47 1105 BA Amsterdam NetherlandsDr.

Purpose: To study the relationship between retinal vessel diameters and incide nt age-relatedmacular disease (iAMD).Design: Prospective population-based coho rt study. Participants: Persons (55 years and older) from the Rotterdam Study, w ho participated at the baseline (1990-1993) and 1 of 2 follow up examinations ( 1993-1994 and 1997-1999). Methods: In the current analysis, 4345 participants who were free of AMD at baseline and had gradable macular transparencies at both baseline and follow-up examination were included. Also, arteriolar and venular diameters were measured on digitized baseline images. Stereoscopic transparenci es of the macular region were graded according to the International Classificati on and Grading System for AMD. Incidence of AMD was defined as the development o f soft distinct drusen with pigmentary changes or indistinct or reticular drusen with or without pigmentary changes (early iAMD) or atrophic or neovascular AMD (late iAMD). Logistic regression models were used to assess these associations, adjusting for age, gender, and follow-up time and, additionally, for smoking, b ody mass index, intima-media thickness, systolic blood pressure, and total and high-density lipoprotein cholesterol levels. Main Outcome Measure: Incidence of AMD. Results: After a mean follow-up time of 5.2 years, a total of 374 persons developed early and late iAMD. Neither arteriolar nor venular diameters were re lated to the risk of iAMD. The odds ratio (OR) per standard deviation (SD) decre ase in arteriolar diameter was 1.03 (95%confidence interval [CI], 0.93-1.15) , and the OR per SD increase in venular diameter was 1.04 (95%CI, 0.93-1.16). Af ter categorizing the retinal vessel diameters into quintiles, there was no trend . After stratifying on age, only persons 75 years and older with smaller arterio lar diameters were at a borderline significant increased risk of iAMD: OR/SD dec rease in arteriolar diameters adjusted for age, gender, follow-up time, and oth e

关键词：黄斑病变视网膜血管软性玻璃膜疣随访检查色素改变血管危险因素立体镜前瞻性队列研究模型评价中层厚度

Phased,chromosome-scale genome assemblies of tetraploid potato reveal a complex genome,transcriptome,and predicted proteome landscape underpinning genetic diversity

在线全文

学校读者我要写书评

暂无评论

Molecular Plant 2022年第3期15卷 520-536页

作者： Genevieve Hoopes Xiaoxi Meng John P.Hamilton Sai Reddy Achakkagari Fernanda de Alves Freitas Guesdes Marie E.Bolger Joseph J.Coombs Danny Esselink Natalie R.Kaiser Linda Kodde Maria Kyriakidou Brian Lavrijssen Natascha van Lieshout Rachel Shereda Heather K.Tuttle Brieanne Vaillancourt Joshua C.Wood Jan Mde Boer Nolan Bornowski Peter Bourke David Douches Herman Jvan Eck Dave Ellis Max J.Feldman Kyle M.Gardner johannes C.P.Hopman Jiming Jiang Walter S.De Jong Joseph C.Kuhl Richard G.Novy Stan Oome Vidyasagar Sathuvalli Ek Han Tan Remco A.Ursum M.Isabel Vales Kelly Vining Richard G.F.Visser Jack Vossen G.Craig Yencho Noelle L.Anglin Christian W.B.Bachem Jeffrey B.Endelman Laura M.Shannon Martina V.Stromvik Helen H.Tai Bjorn Usadel C.Robin Buell Richard Finkers Department of Plant Biology Michigan State UniversityEast LansingMI 48824USA Department of Horticultural Science University of MinnesotaSt.PaulMN 55108USA Department of Plant Science McGill UniversitySainte-Anne-de-BellevueQC H9X 3V9Canada Plant Breeding Wageningen University&ResearchPlant Breeding6708 PB Wageningenthe Netherlands IBG-4 Bioinformatics Forschungszentrum JülichWilhelm Johnen Str52428 JülichGermany Department of Plant Soiland Microbial SciencesMichigan State UniversityEast LansingMI 48824USA Bayer Crop Science WoodlandCA 95695USA Averis Seeds B.V. 9640 AA Veendamthe Netherlands International Potato Center 1895 Avenida La MolinaLimaPeru USDA-ARS ProsserWA 99350USA Agriculture and Agri-Food Canada Fredericton Research and Development Centre FrederictonNB E3B 4Z7Canada School of Integrative Plant Science Cornell UniversityIthacaNY 14853-1901USA Department of Plant Sciences University of IdahoMoscowID 83844USA USDA-ARS Small Grains and Potato Germplasm ResearchAberdeenID 83210USA HZPC Research B.V. Edisonweg 58501 XG Jourethe Netherlands Department of Crop and Soil Science Oregon State UniversityHermistonOR 97838USA School of Biology and Ecology University of Maine5735 Hitchner Hall OronoME 04469USA Department of Horticultural Sciences Texas A&M UniversityCollege StationTX 77843-2133USA Department of Horticulture Oregon State UniversityCorvallisOR 97331USA Department of Horticultural Science North Carolina State UniversityRaleighNC 27695-7609USA Department of Horticulture University of Wisconsin-MadisonMadisonWI 53706USA Department of Horticulture Michigan State UniversityEast LansingMI 48824USA Institute for Biological Data Science Heinrich Heine UniversityDusseldorf40225 DusseldorfGermany Plant Resilience Institute Michigan State UniversityEast LansingMI 48824USA Present address:GenNovation B.V. Wageningenthe Netherlands

Cultivated potato is a clonally propagated autotetraploid species with a highly heterogeneous *** assemblies of six cultivars including two chromosome-scale phased genome assemblies revealed extensive allelic diversity,including altered coding and transcript sequences,preferential allele expression,and structural variation that collectively result in a highly complex transcriptome and predicted proteome,which are distributed across the homologous *** species contribute to the extensive allelic diversity in tetraploid cultivars,demonstrating ancestral introgressions predating modern breeding *** a clonally propagated autotetraploid that undergoes limited meiosis,dysfunctional and deleterious alleles are not purged in tetraploid *** a quarter of the loci bore mutations are predicted to have a high negative impact on protein function,complicating breeder’s efforts to reduce genetic *** StCDF1 locus controls maturity,and analysis of six tetraploid genomes revealed that 12 allelic variants of StCDF1 are correlated with maturity in a dosage-dependent *** of the complexity of the tetraploid potato genome with its rampant structural variation and embedded deleterious and dysfunctional alleles will be key not only to implementing precision breeding of tetraploid cultivars but also to the construction of homozygous,diploid potato germplasm containing favorable alleles to capitalize on heterosis in F1 hybrids.

关键词： potato allele diversity phased assembly polyploid pan-genome wild introgressions

Chaetomium-like fungi causing opportunistic infections in humans:a possible role for extremotolerance

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

Fungal Diversity 2016年第1期76卷 11-26页

作者： Sarah A.Ahmed Ziauddin Khan Xue-wei Wang Tarek A.A.Moussa Hassan S.Al-Zahrani Omar A.A.lmaghrabi Deanna A.Sutton S.Ahmad johannes Z.Groenewald A.Alastruey-Izquierdo Anne van Diepeningen S.B.J.Menken M.J.Najafzadeh Pedro W.Crous Oliver Cornely Axel Hamprecht Maria J.G.T.Vehreschild A.J.Kindo G.Sybren de Hoog Faculty of Medical Laboratory Sciences University of KhartoumKhartoumSudan CBS-KNAW Fungal Biodiversity Centre P.O.Box 851673508 AD UtrechtThe Netherlands Institute for Biodiversity and Ecosystem Dynamics University of AmsterdamAmsterdamThe Netherlands Department of Microbiology Faculty of MedicineKuwait UniversityKuwaitKuwait State Key Laboratory of Mycology Institute of MicrobiologyChinese Academy of SciencesBeijingChina Biological Sciences Department Faculty of ScienceKing Abdulaziz UniversityJeddahSaudi Arabia Botany and Microbiology Department Faculty of ScienceCairo UniversityGizaEgypt Fungus Testing Laboratory Department of PathologyUniversity of Texas Health Science Center at San AntonioSan AntonioTXUSA Mycology Reference Laboratory National Centre for MicrobiologyCarlos III Institute of Health(Servicio deMicologíaCentro Nacional de MicrobiologíaInstituto de Salud Carlos III)MadridSpain Department of Parasitology and Mycology Mashhad University of Medical SciencesMashhadIran German Centre for Infection Research(DZIF)at Cologne/Bonn First Department of Internal MedicineUniversity Hospital of CologneCologneGermany Institute for Medical Microbiology Immunology and HygieneUniversity of CologneCologneGermany Department of Microbiology Sri Ramachandra UniversityPorurChennaiIndia Peking University Health Science Center Research Center for Medical MycologyBeijingChina Sun Yat-Sen Memorial Hospital Sun Yat-Sen UniversityGuangzhouChina Shanghai Institute of Medical Mycology Changzheng HospitalSecond Military Medical UniversityShanghaiChina 17 Basic Pathology DepartmentFederal University of ParanáStateCuritibaParanáBrazil

Members of the family Chaetomiaceae are ubiquitous ascosporulating fungi commonly,which reside in soil enriched with manure or cellulosic *** role as human pathogens is largely ***,the ability of some species to grow at high temperature enables them to play an important role as opportunistic *** family contains several genera and species that have never been reported to cause human ***,three new species are described;two belong to the genus Subramaniula and one represents a Chaetomium *** asteroides was isolated from various sources including eye and skin infections as well as from the natural environment,and *** was isolated from a toe *** anamorphosum was isolated from a kidney transplant patient suffering from fungal *** species described were previously misidentified as Papulaspora *** to the formation of cellular clumps or bulbil-like structures,which are characteristic of *** isolates failed to form sexual fruit bodies and ascospores remained absent,which is an unusual feature for the generally ascosporulating genera Chaetomium and Subramaniula;minute conidia from phialides were sometimes observed.

关键词： Chaetomium Desert fungi Keratitis Papulaspora Peritonitis Sterile fungi Subramaniula