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1670篇 您的检索式:作者名="Allen F"
    题名 作者 年代 出处 被引量
1Linking water and nutrients through the vadose zone: a fungal interface between the soil and plant systems显示文摘Plant water availability, use, and management have largely focused on physical processes of infiltration and the role of roots in uptake and transpiration. However, roots and mycorrhizal fungi redistribute water in complex patterns. Here I describe some of our observations and experiments showing that mycorrhizal fungi play key roles in moving water for both transpiration and to facilitate nutrient acquisition under dry conditions. Mycorrhizal fungal hyphae grow from both surface and deep roots even into bedrock to help extract water under dry conditions. In both deep and surface roots, mycorrhizal fungi acquire water from pores too small for roots and root hairs to access, and at distances from roots and root hairs. Mycorrhizal fungi are also able to utilize hydraulic-lifted water from plants to obtain nutrients in extremely dry surface soils. The importance of these root symbionts in water and nutrient dynamics, and as integrators of surface and deeper water dynamics need further investigation.Michael F ALLEN 2011Journal of Arid Land2011,3,3:4
2Chinese NGOs in action against HIV/AIDS显示文摘Chinese nongovernmental organizations (NGOs) have played a significant role in the battle against AIDS in the People’s Republic of China. This article provides a brief overview of the structure of these organizations, as well as an analysis of their principle accomplishments. Of great significance in this analysis is the fact that Chinese NGOs have effectively dealt with many sensitive health education areas that government authorities have felt reluctant to handle directly. As such, they have provided an indispensable component in the HIV/AIDS prevention and control calculus on the mainland.Hua XU Yi ZENG Allen F ANDERSON 2005Cell Research2005,15,11:4
3吉林省受艾滋病影响儿童青少年相关情况及关怀与支持活动调查显示文摘目的了解吉林省受艾滋病影响儿童青少年的家庭经济生活、心理、学习和医疗保健等方面情况,以及近年来对其开展的关怀支持活动效果,探讨有效措施和方法保证其健康成长。方法在两个感染者相对集中、属于艾滋病综合防治示范区的县区随机选取58名7.18岁受艾滋病影响儿童青少年进行调查。结果58名受艾滋病影响儿童青少年均生活在农村,父母双亡1人,单亡11人;父母均患有艾滋病9人,一方患有艾滋病37人。家庭年平均收人2400元,低于当地的平均收人水平(3000元)。45名(77.59%)在校学习。自述得知父母患有艾滋病后学习成绩没有发生变化25名(55.56%),学习成绩下降11名(24.44%),学习成绩不稳定6名(13.33%),学习成绩有所提高3名(6.67%)。19名(32.76%)存在心理压力。24人(41.38%)担心父母的病情,不愿让他人知道父母患有艾滋病。51人(87.93%)了解艾滋病预防知识。58名受艾滋病影响儿童青少年都希望没有歧视、平等的生活,能够得到基本的医疗保健。当地政府落实了国家“四免一关怀”政策,学校内外进行了反歧视教育、生活技能培训及关怀与支持活动。结论受艾滋病影响儿童青少年在生活、心理、学习、医疗保健方面需要社会的帮助,开展关怀与支持活动能够促进他们的健康成长。侯祥 Allen F Anderson 孟向东 徐迪祥 李志和 Hillary E Anderson 张新刚 范吉祥 郎莹 张孝伟 臧力权 2006中国卫生工程学2006,5,2:3
4Parturition and urinary incontinence in primiparas 1 1 Statistical analysis was done by Pantelis Andreou.显示文摘Scott A Farrell Victoria M Allen Thomas F Baskett 2001Obstetrics & Gynecology2001,,3:2
5Competition between plants of different successional stages:Mycorrhizae as regulators显示文摘Allen E B Allen M F 1984Can J Bot1984,62,:2
6Water source partitioning among trees growing on shallow karst soils in a seasonally dry tropical climate显示文摘Querejeta J I Estrada-Medina H Allen M F 2007Oecologia2007,152,:1
7In vivoFate ofUnimers and Micelles ofa Poly(ethylene glycol)-block-poly(caprolactone)Copolymer inMice Following IntravenousAdministration显示文摘Liu J Zeng F Allen C 2007Eur J Pharm2007,65,3:1
8Wide band imped- ance matching: H∞ performance bounds显示文摘SCHWARTZ D F ALLEN J C 2004IEEE Transactions on Circuit and Systems--II: Express Briefs2004,51,7:1
9Bubbles, Crises and policy显示文摘Allen F Gale D 1998Oxford Review of Economic Policy1998,15,3:1
10Spectral sensitization of the heterogeneous photocatalytic oxidation of hydroquinone in aqueous solutions at phthalocyanine - coated titanium dioxide powders显示文摘Fu - Ren F Fan Allen J Bard 1979J Am Chem Soc1979,101,20:1
11Deleterious rhizosphere bacteria:An integrating perspectice显示文摘Nehl D B Allen S J Brown J F 1996Applied Soil Ecology1996,5,:1
12Recording of EEG during fMRI experiments:patient safety显示文摘Lemieux L Allen PJ Franconi F 1997Magn Reson Med1997,38,6:1
13Diversity of opinion and financing of new technologies 显示文摘Allen F Gale D 1999Journal of Financial Intermedia- tion1999,8,:1
14Control of leaf morphogenesisby mircroRNAs 显示文摘Palatnik J F Allen E Wu X L 2003Nature2003,425,6955:1
15Arbitrage, short sales, and financial innovation 显示文摘Allen F Gale D 1991Econometrica: Journal of the Econometric Society1991,,:1
16The genome sequence of the psychrophilic archaeon, Methanococcoides burtonii: the role of genome evolution in cold adaptation显示文摘Allen M A Lauro F M Williams T J 2009ISME J2009,3,9:1
17Process and temperature compensation in a 7-MHz CMOS clock osctllator显示文摘Sundaresan K Allen P E Ayazi F 0,,02:1
18The relationship between inflammatory bowel disease and socioeconomic variables显示文摘Charles N Bernstein Allen Kraut James F Blanchard Patricia Rawsthorne Nancy Yu Randy Walld 2001The American Journal of Gastroenterology2001,,7:1
19Towards a General Theory of Action and Time显示文摘J F Allen 1984Artificial Intelligence1984,23,:1
20Identification and characterization of human cytomegalovirus-encoded microRNAs显示文摘Grey F Antoniewicz A Allen E 2005J Virol2005,79,12:1
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