维普中文期刊产品整合服务
767篇 您的检索式:作者名="Wulff"
    题名 作者 年代 出处 被引量
1河流盆地的硅持留:对沿海及海洋环境生物地球化学和水生食物网的深远影响显示文摘河流的拦截调蓄和河流盆地的富营养化大大地降低了溶解态硅(DSi)向黑海和波罗的海的输入。尽管流域中的人为输入可以补偿湖泊和水库中去除的N和P,但却不能补偿DSi。看来河流径流中营养物组成(DSi:N:P比)的变化是黑海浮游植物种类构成戏剧性转变的原因。在波罗的海,DSi浓度和DSi:N比从60年代以来一直在下降,表现为春天旺发的硅藻比例下降,而鞭毛藻却增加了。这对黑海和波罗的海沿海生物地球化学循环和食物网结构的影响可能是深远的,因为它表明,随着以调蓄河水为目的的水坝建设的不断增加,河流输送的DSi的下降可能正在世界范围发生。Christoph Humborg Daniel J. Conley Lars Rahm Fredrick Wulff Adriana Cociasu Venugopalan Ittekkot 张国梁 2000AMBIO-人类环境杂志2000,29,1:9
2Associations between the physical environment and park-based physical activity:A systematic review显示文摘Background:With an increase in the evidence for the associations between park-based physical activity(PA)and physical environments(especially park and neighborhood environments),researchers face an important challenge in interpreting and summarizing the evidence to develop environ?mental change interventions.An updated review is needed to better inform policymaking and environmental interventions.The current study aimed to systematically review the research on the associations of park-based PA with park and neighborhood environmental characteristics.Methods:We targeted English peer-reviewed articles from 5 electronic databases using keywords related to park-based PA,park environments,and neighborhood environments.Of the 4071 identified papers,25 studies published between 2008 and 2016 met all the eligibility criteria and were included in this review.Results:The characteristics of physical environment that received consistent support included paths/trails,lighting,and incivilities(e.g.,broken glasses and litter).Mixed findings were revealed for 6 park environmental factors(unspecified active facilities,playgrounds and skating areas,fit?ness stations,picnic areas,greenness,and park size)and 2 neighborhood environmental factors(park density and park proximity).Conclusion:It can be concluded that paths/trails,lighting,and incivilities are 3 key physical environmental attributes of park-based PA.Given the inconsistent findings on park and neighborhood environmental factors,more robust designs such as prospective investigation are required.Ru Zhang Hagen Wulff Yanping Duan Petra Wagner 2019Journal of Sport and Health Science2019,8,5:7
3Bone mineral density in lifelong trained male football players compared with young and elderly untrained men显示文摘Purpose: The purpose of the present controlled cross-sectional study was to investigate proximal femur and whole-body bone mineral density(BMD), as well as bone turnover profile, in lifelong trained elderly male football players and young elite football players compared with untrained age-matched men.Methods: One hundred and forty healthy, non-smoking men participated in the study, including lifelong trained football players(FTE, n = 35)aged 65—80 years, elite football players(FTY, n = 35) aged 18—30 years, as well as untrained age-matched elderly(UE, n = 35) and young(UY,n = 35) men. All participants underwent a regional dual-energy X-ray Absorptiometry(DXA) scan of the proximal femur and a whole-body DXA scan to determine BMD. From a resting blood sample, the bone turnover markers(BTMs) osteocalcin, carboxy-terminal type-1 collagen crosslinks(CTX-1), procollagen type-1 amino-terminal propeptide(P1NP), and sclerostin were measured.Results: FTE had 7.3%—12.9% higher(p < 0.05) BMD of the femoral neck, wards, shaft, and total proximal femur in both legs compared to UE,and 9.3%—9.7% higher(p < 0.05) BMD in femoral trochanter in both legs compared to UY. FTY had 24.3%—37.4% higher(p < 0.001) BMD in all femoral regions and total proximal femur in both legs compared to UY. The whole-body DXA scan confirmed these results, with FTE showing similar whole-body BMD and 7.9% higher(p < 0.05) leg BMD compared to UY, and with FTY having 9.6% higher(p < 0.001) wholebody BMD and 18.2% higher(p < 0.001) leg BMD compared to UY. The plasma concentration of osteocalcin, CTX-1, and P1NP were 29%,53%, and 52% higher(p < 0.01), respectively, in FTY compared to UY.Conclusion: BMD of the proximal femur and whole-body BMD are markedly higher in lifelong trained male football players aged 65—80 years and young elite football players aged 18—30 years compared to age-matched untrained men. Elderly football players even show higher BMD in femoral trochanter and leg BMD than untrained young despite an age difference of 47 years.Marie Hagman Eva Wulff Helge Therese Hornstrup Bjorn Fristrup Jens Jung Nielsen Niklas Rye Jorgensen Jesper Lovind Andersen Jorn Wulff Helge Peter Krustrup 2018Journal of Sport and Health Science2018,7,2:5
4Catalytically active, molecularly imprinted polymers in bead form显示文摘ALEXANDE S HRADIL J WULFF G 2003Reactive & Functional Polymer2003,54,:2
5内部生态系统反馈加重了固氮蓝藻细菌藻华并使波罗的海管理复杂化显示文摘波罗的海的富营养化可能已潜在地增加了蓝藻细菌藻华发生的频率和规模。富营养化导致有机沉积物的增加,底层缺氧状况的加剧以及随后的系统内磷负荷的加重。此外,低氧水体积呈现与无机氮库负相关的关系,提示随低氧程度的增加,总氮的消除也会增加。系统内磷负荷加重和溶解的无机氮消除的增加将导致较低的氮磷比,而低的氮磷比是促进固氮蓝藻细菌藻华发生的主要原因之一。因为波罗的海开阔水域的蓝藻细菌藻华似乎被其内部作用所强有力地调控,因此,外部营养物质消减的影响与尺度相关。在较长的时间尺度上,外部磷负荷的减少可能会降低蓝藻细菌藻华的发生;然而,在较短时间尺度上,内部磷负荷可能会抵消外部磷负荷的降低。这些可诱导内部负荷(增加)、氮清除以及固氮蓝藻细菌占优势的耦合的过程,可被定性地描述为一种具有潜在自驱式的'恶性循环'。为了有效抑制蓝藻细菌藻华以及所有的富营养化征象,削减氮和磷外部负荷似乎是至关重要的。Emil Vahtera Daniel J.Conley Bo G.Gustafsson Harri Kuosa Heikki Pitknen Oleg P.Savchuk Timo Tamminen Markku Viitasalo Maren Voss Norbert Wasmund Fredrik Wulff 陈欣然 2007AMBIO-人类环境杂志2007,36,2:2
6Distribution and quantification of Candidatus Liberibacter americanus, agent of huanglongbing disease of citrus in S?o Paulo State, Brasil, in leaves of an affected sweet orange tree as determined by PCR显示文摘Diva C. Teixeira Colette Saillard Carole Couture Elaine C. Martins Nelson A. Wulff Sandrine Eveillard-Jagoueix Pedro T. Yamamoto Antonio J. Ayres Joseph M. Bové 2008Molecular and Cellular Probes2008,,3:2
7Suppression of performance curve instability of an axial-flow pump by using a double-inlet-nozzle 显示文摘Perez Flores P Kosyna G Wulff D 2008International Journal of Rotating Machinery2008,,53:1
8Use of polymers with enzyme-analogous structures for the resolution of racements显示文摘Wulff G Sarhan A 1972Angew Chem Int Ed Engl1972,11,4:1
9Racemic resolution of free sugars with macroporous polymers prepared by molecular imprinting selectivity dependence on the arrangement of functional groups versus spatial requirements显示文摘Wulff G Schauhoff S 1991J Org Chem1991,56,:1
10Domain swapping and gene shuffling identify sequences required for induction of an Avr-dependent hypersensitive response by the tomato Cf-4 and Cf-9 proteins显示文摘Wulff B B H Thomas C M Smoker M 2001Plant Cell2001,13,:1
11显示文摘WULFF G VESPER W EINSLER R G 1977Makromol Chem1977,178,11:1
12The use of polymers with enzyme-analogous structures for the resolution of racemates显示文摘WULFF G SARHAN A 1972An gew Chem Int Ed1972,11,4:1
13查看详情显示文摘Wulff G 0,,:1
14Localization of mrna for vascular endothelial growth factor (Vegf), angio- poietins and their receptors during the peri-implanta- tion period and early pregnancy in marmosets (Cal- lithrix Jacchus) 显示文摘Rowe A J Wulff C Fraser H M 2003Reproduction2003,126,2:1
15A new enzyme model for enantioselective esterases based on molecularly imprinted polymers 显示文摘EMGENBROICH M WULFF G 2003Chem Eur J2003,9,17:1
16Prospects of molecular markers in Fusarium species diversity显示文摘Chandra N S Wulff E G Udayashankar A C et ol 2011Applied Microbiology and Bioteehnology2011,90,:1
17Clinical lymph node staging--in-fluence of slice thickness and reconstruction kernel on volumetryand RECIST measurements显示文摘Fabel M Wulff A Heckel F 2012Eur J Radiol2012,81,:1
18Herpes simplex keratitis after photorefractive keratectomy 显示文摘Wulff K Fechner PU 1997Refract Surg1997,13,7:1
19Uber die anwendung von enzymanalog egbauten polymeren zur racemattren nung 显示文摘Wulff G Sarhan A 1972Angew Chem1972,84,8:1
20Design of a potent and selective inhibitor of the intermediate-conductance Ca^2+-activated K^+ channel, IKCal: a potential immunosup- pressant显示文摘Wulff H Miller M J Hansel W 2000Proc Natl Acad Sci USA2000,97,14:1
返回顶部 每页显示:
共39页 首页 上一页 第1页 下一页 末页 /39 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费