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215篇 您的检索式:作者名="Scott MA"
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1Biochar increases soil microbial biomass with changes in extra-and intracellular enzyme activities:a global meta-analysis显示文摘Biochar application to soil has been proposed as a potential management strategy to enhance soil carbon(C)sequestration,reduce greenhouse gas emission,improve soil quality,and increase crop productivity.The effects of biochar on soil microbial and enzyme activities are integrally linked to the potential of biochar in achieving these benefits.We conducted a global meta-analysis to assess the effects of biochar on soil microbial biomass C and nitrogen(N)and the activities of 12 enzymes,and identify key factors affecting those soil microbial properties using 964 data points from 72 papers.We found that biochar effects on enzyme activities vary widely with soil type,biochar property and the type of enzyme studied.Biochar significantly increased microbial biomass C(MBC)and urease,alkaline phosphatase and dehydrogenase activities by 21.7%,23.1%,25.4%and 19.8%,respectively,with no significant negative effects on any of the enzymes analyzed in this study.Biochar application was more effective in increasing MBC and enzyme activities in soils with low pH(<6.5),TC(<20 g kg^(−1)),TN(<2 g kg^(−1)),and a fine texture(including clay,clay loam and silt clay).Biochars produced at pyrolysis temperature of 350-550℃ with a high pH(>10)and low C/N ratio(<50)increased MBC and urease and dehydrogenase activities.Biochar increased MBC and N-acquisition enzyme activities in the field but not in lab incubation experiments.Urease was increased in short-term studies(within 100 days of biochar application)while alkaline phosphatase was increased in long-term studies that span more than 1 year.The increase in MBC and activities of some soil enzymes in response to biochar application with no negative effects on any hydrolytic and oxidative enzymes illustrate its potential to enhance soil quality particularly in the degraded soils with low nutrient availability and fertility due to limited soil microbial and enzymatic activities.This study also shows that biochars can be designed to achieve specific properties for enhancing microbial and enzymatic activities for specific soils.Prem Pokharel Zilong Ma Scott X.Chang 2020Biochar2020,2,1:18
2Recent progress in methane dehydroaromatization: From laboratory curiosities to promising technology显示文摘Direct conversion of methane to benzene or other valuable chemicals is a very promising process for the efficient application of natural gas. Compared with conversion processes that require oxidants, non-oxidative direct conversion is more attractive due to high selectivity to the target product. In this paper, an alternative route for methane dehydrogenation and selective conversion to benzene and hydrogen without the participation of oxygen is discussed. A brief review of the catalysts used in methane dehydroaromatization (MDA) is first given, followed by our current understanding of the location and the active phase of Mo species, the reaction mechanism, the mechanism of carbonaceous deposit and the deactivation of Mo/zeolite catalysts are systematically discussed. Ways to improve the catalytic activity and stability are described in detail based on catalyst and reaction as well as reactor design. Future prospects for methane dehydroaromatization process are also presented.Shuqi Ma Xiaoguang Guo Lingxiao Zhao Susannah Scott Xinhe Bao 2013Journal of Energy Chemistry2013,22,1:17
3First dark matter search results from the PandaX-Ⅰ experiment显示文摘We report on the first dark-matter(DM)search results from PandaX-I,a low threshold dual-phase xenon experiment operating at the China JinPing Underground Laboratory.In the 37-kg liquid xenon target with 17.4 live-days of exposure,no DM particle candidate event was found.This result sets a stringent limit for low-mass DM particles and disfavors the interpretation of previously-reported positive experimental results.The minimum upper limit,3.7×10-44cm2,for the spin-independent isoscalar DM-particle-nucleon scattering cross section is obtained at a DM-particle mass of 49 GeV/c2at 90%confidence level.XIAO MengJiao XIAO Xiang ZHAO Li CAO XiGuang CHEN Xun CHEN YunHua CUI XiangYi FANG DeQing FU ChangBo GIBONI Karl L. GONG HaoWei GUO GuoDong HU Jie HUANG XingTao JI XiangDong JU YongLin LEI SiAo LI ShaoLi LIN Qing LIU HuaXuan LIU JiangLai LIU Xiang LORENZON Wolfgang MA YuGang MAO YaJun NI KaiXuan PUSHKIN Kirill REN XiangXiang SCHUBNELL Michael SHEN ManBing STEPHENSON Scott TAN AnDi TARL Greg WANG HongWei WANG JiMin WANG Meng WANG XuMing WANG Zhou WEI YueHuan WU ShiYong XIE PengWei YOU YingHui ZENG XiongHui ZHANG Hua ZHANG Tao ZHU ZhongHua 2014Science China(Physics,Mechanics & Astronomy)2014,57,11:10
4PandaX: a liquid xenon dark matter experiment at CJPL显示文摘PandaX is a large liquid-xenon detector experiment usable for direct dark-matter detection and 136Xe double-beta decay search.The central vessel was designed to accommodate a staged target volume increase from initially 120 kg(stage I)to 0.5 t(stage II)and eventually to a multi-ton scale.The experiment is located in the Jinping Deep-Underground Laboratory in Sichuan,China.The detector operates in dual-phase mode,allowing detection of both prompt scintillation,and ionization charge through proportional scintillation.In this paper a detailed description of the stage I detector design and performance as well as results established during the commissioning phase are presented.CAO XiGuang CHEN Xun CHEN YunHua CUI XiangYi FANG DeQing FU ChangBo GIBONI Karl L. GONG HaoWei GUO GuoDong HE Ming HU Jie HUANG XingTao JI XiangDong JU YongLin LI ShaoLi LIN Qing LIU HuaXuan LIU JiangLai LIU Xiang LORENZON Wolfgang MA YuGang MAO YaJun NI KaiXuan PUSHKIN Kirill REN XiangXiang SCHUBNELL Michael SHEN ManBing SHI YuJie STEPHENSON Scott TAN AnDi TARLé Greg WANG HongWei WANG JiMing WANG Meng WANG XuMing WANG Zhou WEI YueHuan WU ShiYong XIAO MengJiao XIAO Xiang XIE PengWei YE Tao YOU YingHui ZEN XiongHui ZHANG Hua ZHANG Tao ZHAO HaiYing ZHAO Li ZHOU XiaoPeng ZHU ZhongHua 2014Science China(Physics,Mechanics & Astronomy)2014,57,8:9
5Transition Metal Aluminum Boride as a New Candidate for Ambient-Condition Electrochemical Ammonia Synthesis显示文摘Achieving more meaningful N2 conversion by reducing the energy input and carbon footprint is now being investigated through a method of N2 fixation instead of the Haber-Bosch process.Unfortunately,the electrochemical N2 reduction reaction(NRR)method as a rising approach currently still shows low selectivity(Faradaic efficiency<10%)and high-energy consumption[applied potential at least-0.2 V versus the reversible hydrogen electrode(RHE)].Here,the role of molybdenum aluminum boride single crystals,belonging to a family of ternary transition metal aluminum borides known as MAB phases,is reported for the electrochemical NRR for the first time,at a low applied potential(-0.05 V versus RHE)under ambient conditions and in alkaline media.Due to the unique nano-laminated crystal structure of the MAB phase,these inexpensive materials have been found to exhibit excellent electrocatalytic performances(NH3 yield:9.2μg h^-1cm^-2mgcat^-1.,Faradaic efficiency:30.1%)at the low overpotential,and to display a high chemical stability and sustained catalytic performance.In conjunction,further mechanism studies indicate B and Al as main-group metals show a highly selective affinity to N2 due to the strong interaction between the B 2p/Al 3p band and the N 2p orbitals,while Mo exhibits specific catalytic activity toward the subsequent reduction reaction.Overall,the MAB-phase catalyst under the synergy of the elements within ternary compound can suppress the hydrogen evolution reaction and achieve enhanced NRR performance.The significance of this work is to provide a promising candidate in the future synthesis of ammonia.Yang Fu Peter Richardson Kangkang Li Hai Yu Bing Yu Scott Donne Erich Kisi Tianyi Ma 2020Nano-Micro Letters2020,12,5:3
6Neglected Rural Public Health Issue:The Case of Intestinal Roundworms显示文摘Despite increasing institutional and financial support,certain public health issues are still neglected by the Chinese Government.The present paper examines the soil-transmitted helminth(STH)infection and reinfection rates by conducting a survey on 1724 children in Guizhou Province,China.Our results indicate that 37.5 percent of children had been infected with one or more of the three types of tested STH.However,only 50.4 percent of children reported having taken deworming medicine during the 18-month period before the survey.Of those who reported being dewormed,34.6 percent tested positive for STH infections.Poverty and number of siblings are significantly and positively correlated with infection and reinfection,and parental education is significantly and negatively correlated with infection and reinfection.Given the ineffectiveness of treatment in these areas to date,for anthelmintic campaigns to actually succeed,China must pay more attention to locallevel incentives to improve children's health.Linxiu Zhang Yingping Cai Xiaobing Wang Xiaochen Ma Alexis Medina D.Scott Smith Scott Rozelle 2013China & World Economy2013,21,3:2
7Tissue-specific expression of inducible and constitutive Hsp70 isoforms in the western painted turtle 显示文摘Scott MA Locke M Buck LT 2003J Exp Biol2003,206,2:1
8Mycobacteria other than My- cobaeterium tuberculosis are not present in erythema in duratum/nodu- lar Vaseulitis: A case series and liyerature review of the clinical and histologie findings 显示文摘Bayer Gamer IB Cox MD Scott MA 2005J cutaneous patho12005,32,3:1
9Surface replacement hemiarthrop lasty for the treatment of osteonecrosis of the femoral head显示文摘Hungerford MW Mont MA Scott R 1998J Bone Joint Surg (Am)1998,11,:1
10Cigarette smoking strongly modifies the asssociation of LOC387715 and age-related maeular degeneration显示文摘Schmidt S Hauser MA Scott WK 2006Am J Hum Genet2006,78,5:1
11Engagement of CD14 mediates the inflammatory potential of monosodium urate crystals显示文摘Scott P Ma H Viniyalkosol S 2006J Immunol2006,177,9:1
12Expression of nucleic acid?sensing Toll-like receptors predicts HPV16 clearance associat?ed with an E6 - directed cell-mediated response显示文摘Scott ME Ma Y Farhat S 2015Int J Canc?er2015,136,10:1
13Expression of nuclcic acid-sensing Toll-like receptors predicts HPV16 clear- ance associated with an E6-directed cell-mediated re- sponse显示文摘Scott ME Ma Y Farhat S 2015Int J Cancer2015,136,10:1
14Customer delight from theme park experiences: The antecedents of delight based on cognitive appraisal theory显示文摘Ma J Gao J Scott N Peiyi D (2013) 2013Annals of Tourism Research2013,,:1
15The neural correlates of declining performance with age:evidence for age-related changes incognitive control显示文摘Sharp DJ Scott SK Mehta MA 2006Oxford University Press2006,16,:1
16Migration of a PEJ tube following insertion: a bizarre complication显示文摘Chaudhuri A Scott AD Kutiyanwala MA 1999Clin Nutr1999,18,1:1
17Diminished IFN - gama and IL - 10 and elevated Foxp3 mRNA expression in the cervix are ssociated with CIN 2 or 3显示文摘Scott ME Ma Y Kuzmich L 2009Int J Cancer2009,124,6:1
18Stickler syndrome without eye involvement is caused by mutations in COL11A2,the gene encoding the alpha2(XI) chain of type XI collagen显示文摘Sirko-Osadsa DA Murray MA Scott JA Lavery MA Warman ML Robin NH 1998J Pediatr1998,132,:1
19Cytomegalovirus antiviral resistance associated with treatment induced UL97 (protein kinase) and UL54 (DNA polymerase) mutations显示文摘Scott GM Isaacs MA Zeng F 2004J Med Virol2004,74,1:1
20Mental-physical comorbidity in Te Rau Hinengaro: the New Zealand Mental Health Survey 显示文摘Scott KM Oakley Browne MA McGee MA 2006Aust N Z J Psychiatry2006,40,10:1
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