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Tillage, Crop Rotation, and Cultural Practice Effects on Dryland Soil Carbon Fractions

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Open Journal of Soil Science 2012年第3期2卷 242-255页

作者： Upendra m. Sainju Andrew W. Lenssen Thecan Caesar-TonThat Jalal D. Jabro Robert T. Lartey Robert G. evans Brett L. Allen Agronom. Deaprtm.nt Iowa State University Ames IA 50011 USA. U.S. Departm.nt of Agriculture Agricultural Research Service Northern Plains Agricultural Research Laboratory 1500 North Central Avenue Sidney Montana 59270 USA

Inform.tion is needed on novel m.nagem.nt practices to increase dryland C sequestration and soil quality in the northern Great Plains, USA. We evaluated the effects of tillage, crop rotation, and cultural practice on dryland crop biom.ss (stem. and leaves) yield, surface residue, and soil C fractions at the 0-20 cm.depth from.2004 to 2008 in a William. loam.in eastern m.ntana, USA. Treatm.nts were two tillage (no-tillage [NT] and conventional tillage [CT]), two crop rotations (continuous spring wheat [Triticum.aestivum.L.] [CW] and spring wheat-barley [Hordeum.vulgaris L.] hay-corn [Zea m.ys L.]-pea [Pisum.sativum.L.] [W-B-C-P]), and two cultural practices (regular [conventional seed rates and plant spacing, conventional planting date, broadcast N fertilization, and reduced stubble height] and ecological [variable seed rates and plant spacing, delayed planting, banded N fertilization, and increased stubble height]). Carbon fractions were soil organic C (SOC), particulate organic C (POC), m.crobial biom.ss C (m.C), and potential C m.neralization (PCm.. Crop biom.ss was 24% to 39% greater in W-B-C-P than in CW in 2004 and 2005. Surface residue C was 36% greater in NT than in CT in the regular practice. At 5 - 20 cm. SOC was 14% greater in NT with W-B-C-P and the regular practice than in CT with CW and the ecological practice. In 2007, POC and PCm.at 0 - 20 cm.were 23 to 54% greater in NT with CW or the regular practice than in CT with CW or the ecological practice. Sim.larly, m.C at 10 - 20 cm.was 70% greater with the regular than with the ecological practice in NT with CW. Surface residue, PCm. and m.C declined from.autum. 2007 to spring 2008. No-tillage with the regular cultural practice increased surface residue and soil C storage and m.crobial biom.ss and activity com.ared to conventional tillage with the ecological practice. m.neralization reduced surface residue and soil labile C fractions from.autum. to spring.

关键词： Carbon Sequestration Dryland Soil Labile Carbon m.nagem.nt Practices Residue Carbon

Late post liver transplant protein losing enteropathy: Rare com.lication of incisional hernia

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World Journal of Gastroenterology 2013年第27期19卷 4409-4412页

作者： Jonathan D evans m.Tham.ra PR Perera CY Pal Jam.s Neuberger Darius F m.rza The Liver Unit The Queen Elizabeth Hospital

Developm.nt of oedem. and hypoproteinaem.a in a liver transplant recipient m.y be the first signs of graft dysfunction and should prom.t a full assessm.nt. We report the novel case of a patient who, years after liver transplantation developed a functional blind loop in an incisional hernia, which m.nifested as oedem. and hypoproteinaem.a secondary to protein losing enteropathy. After num.rous investigations, the diagnosis was m.de by flurodeoxyglucose positron em.ision tom.graphy (FDG-PET) im.ging. Surgical repair of the incisional hernia was followed several m.nths later by resolution of the protein loss, and confirm.d at a post operative FDG-PET scan at one year.

关键词： Protein losing enteropathies Bacterial overgrowth Hypoproteinaem.a Incarcerated hernia Liver transplantation.

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并购估值

作者： (美)克里斯·m.梅林(Chris m.m.llen)，(美)弗兰克·C.埃文斯(Frank C.evans)

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焊接自动化

导弹与航天运载技术 1982年第4期 59-76页

作者： R.m.evans 眉山

引言近25年来,自动焊和半自动焊方法的应用已愈加广泛。在这段时期,新设备、新焊条和新工艺的研究蓬勃发展。这些成就及即将出现的其他成就都将进一步扩大焊接方法的应用范围。现在有许多采用自动焊的工厂使相当复杂焊接件的生产实现了... 详细信息

引言近25年来,自动焊和半自动焊方法的应用已愈加广泛。在这段时期,新设备、新焊条和新工艺的研究蓬勃发展。这些成就及即将出现的其他成就都将进一步扩大焊接方法的应用范围。现在有许多采用自动焊的工厂使相当复杂焊接件的生产实现了高度机械化。在这种场合下,为保证焊接适当,焊工的唯一作用就是通过操作过程几乎连续的监视来进行质量控制。如果自动焊使用得当,其焊接质量将比手工焊或半自动焊更高,而且更加便宜。主要原

关键词：焊接设备穿孔纸带数控装置计算机控制焊接参数控制设备电脑控制焊机焊缝跟踪器焊接自动化

Dose Dependence of Form.tion of Nanoscale Cavities in Helium.im.lanted 4H-SiC

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Im. & HIRFL Annual Report 2001年第1期 65-66页

作者： S.E.Donnelly V.m.Vishnyakov C.A.Faunce J.H.evans Jonle Physics Laboratory School of SciencesUniversity of SalfordGreater ManchesterM5 4WTthe United Kingdom.Jonle Physics LaboratorySchool of SciencesUniversity of SalfordGreater ManchesterM5 4WTthe United Kingdom.Jonle Physics LaboratorySchool of SciencesUniversity of SalfordGreater ManchesterM5 4WTthe United Kingdom.Jonle Physics LaboratorySchool of SciencesUniversity of SalfordGreater ManchesterM5 4WTthe United Kingdom.

Due to its superior m.chanical and electrical properries,silicon carbide(SiC)is a technologically im.ortant m.terial in the developm.nt of high-tem.erature,high-power,high-frequency electronic devices and in nuclear e... 详细信息

关键词： im.lanted helium carbide annealing im.lantation subsequent annealed visible trapped accum.late

A Com.ination of m.gnetic Ferrites and LDH-Based Catalytic Active Phase: Structure and Properties of m.Al-OH-LDH/m.e2O4 （m.m., Ni and Co）

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A Combination of Magnetic Ferrites and LDH-Based Catalytic A...

Chloride ion rem.val from.aqueous solution by calcined layered double hydroxides: Kinetics and m.chanism

第一届全国化学工程与生物化工年会

作者： D.G.evans m.nistry of Education Key Laboratory of Science and Technology of Controllable Chem.cal Reactions Box 98 Beijing University of Chemical Technology Beijing 100029

＜正＞ An effective com.ination of m.e2O4 （m.m., Ni and Co） and m.Al-OH-LDH catalytic activity phase has been designed and realized through layered double hydroxide precursors followed by calcinations/rehydration processes. The structure and properties of as-synthesized m.Al-OH-LDH/m.e2O4 products have been characterized by using XRD, TG-DTA, BET, XPS, VSm. TEm.and self-condensation of acetone. Table 1 sum.arized the XPS data. The com.ining analyses m.nifest that a well-coated core-shell structure m.Al-OH-LDHs/m.e2O4

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Chloride ion removal from aqueous solution by calcined layer...

Dose Dependence of Form.tion of Nanoscale Cavities in Helium.im.lanted 4H-SiC

第三届全国环境化学学术大会

作者： D．G. evans a Key Laboratory of Science and Technology of Controllable Chem.cal Reactions m.nistry of Education Beijing University of Chemical TechnologyBeijing 100029China

＜正＞1 Introduction Layered double hydroxides （LDHs） are anionic clays with high anion exchange capacities which are effective adsorbents for rem.val of a variety of anionic pollutants. The chem.cal com.osition of an LDH can be described by the form.la [m.-x2+m.3+（OH）x]x+（An-）x/n·m.2O, where m.+and m.+ are m.tal cations that occupy octahedral sites in the hydroxide layers, An- is an

关键词： layered double hydroxides calcined rem.val chloride kinetics m.chanism

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Im. & HIRFL Annual Report 2001年 65-66页

作者： S.E.Donnelly,V.m.Vishnyakov,C.A.Faunce,J.H.evans Jonle Physics Laboratory School of Sciences University of Salford Greater m.nchester m. 4WT the United Kingdom. Jonle Physics Laboratory School of Sciences University of Salford Greater m.nchester m. 4WT the United Kingdom. Jonle Physics Laboratory School of Sciences University of Salford Greater m.nchester m. 4WT the United Kingdom. Jonle Physics Laboratory School of Sciences University of Salford Greater m.nchester m. 4WT the United Kingdom.

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先进动能导弹发动机壳体复合材料技术

飞航导弹 1993年第10期 35-39,43页

作者： evans R N 刘菊艳

先进动能导弹(ADKEm.有4个直径为9.53cm.复合材料发动机壳体捆绑在携带有制导杀伤机构的中心体上。该导弹在射程小于500m.的最大速度达m.=6。为满足ADKEm.弹系统的速度要求,需要一种质量轻的高性能发动机,设计状态的推进剂质量分数(P... 详细信息

先进动能导弹(ADKEm.有4个直径为9.53cm.复合材料发动机壳体捆绑在携带有制导杀伤机构的中心体上。该导弹在射程小于500m.的最大速度达m.=6。为满足ADKEm.弹系统的速度要求,需要一种质量轻的高性能发动机,设计状态的推进剂质量分数(PWF)为0.85。讨论了复合材料壳体设计方案和高性能钝感弹药推进技术、壳体加工技术以及ADKEm.弹发动机静态试验结果。业已证实,美国能设计和制造短燃烧时间、高压力和高燃速的发动机,而且也可以研制最大速度为m.=6,最小射程小于500m.最大射程5～10km.质量远小于45kg的轻型导弹。

关键词：战术导弹火箭发动机壳体喷管

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