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    题名 作者 年代 出处 被引量
1海南岛农用地土壤重金属元素的空间分布特征及其环境意义显示文摘采用现场采样及室内分析测试方法,对海南岛26个农业土壤剖面淋溶层、淀积层、母质层中7种重金属元素的分布特征进行研究。结果发现,重金属元素在淋溶层和淀积层的含量变化幅度与母质层含量变化幅度具有一定的正相关关系,土壤重金属分布在总体上受成土母质层制约。除As、Pb外,大部分重金属元素在各层中的含量低于世界土壤平均值,但也有部分重金属元素通过淋溶使表层土壤中少量重金属元素迁移而至淀积层中积累。除Cd有机态含量最低外,各层中重金属元素在淋溶层、淀积层、母质层中均显示可交换态含量最低,而残渣态含量最高。区内土壤表层7种重金属分布总体上可归为3类:Cr、Ni、Cd3种重金属元素的土壤表层平均含量较低,变异系数小,表层元素主要继承于母质层;Cu、Zn组中的Zn可能存在一定的外源混入,但Cu、Zn在土壤表层未发生富集;而As、Pb等重金属元素不仅有外源混入,且发生了一定程度积累,为区内土壤主要的环境隐患。赵志忠 A W Rate 唐少霞 毕华 2008农业环境科学学报2008,27,1:16
2活性氧化铝除氟研究显示文摘针对目前活性氧化铝饮水除氟中存在的问题,进行了生产性试验研究,通过采用原水投加CO_2气体降低pH值、小颗粒活性氧化铝、大流量短历时的NaOH循环再生法等新技术,提高了活性氧化铝的吸附容量和处理水的能力,克服滤料板结和假疲劳,除氟效果稳定可靠,水质好,再生时间短,用药省,降低了基建投资和运转费用。North China Municipal Engineering Design Institute A full-scale plant was set up for studying the existing problems on the fluoride removal from drinking water by activated alumina. Some new methods was adopted,such as the addition of CO2to reduce water pH value,the use of small-sized activated alumina,and the employment of a cyclic regeneration at large flow rate with NaOH as regenerant,which result in the improvement of adsorption capacity of activated alumina and treatment capacity, the elimination of the hardening of filtration materials and false fatigue,stable and reliable effectiveness,good quality in water,short regeneration time,small consumption of regenerant. And then the capital and openational costs were reduced. 1989中国给水排水1989,5,3:5
3Preparation of neodymium-doped yttrium aluminum garnet powders and fibers显示文摘Using nitrate precursors, a novel spray-drying assisted citrate gel process for the preparation of neodymium-doped yttrium alumi- num garnet (YAG) phase was developed. Synthesis of single-phase polycrystalline YAG was achieved at temperatures as low as 800 °C us- ing the spray-drying methodology whilst conventional approaches currently available require 1000 °C. Initially, a solution was prepared by mixing aluminum and yttrium nitrates, citric acid, etilenglycol and neodymium oxide. This solution was dried by pulverization (spray dryer) to obtain aggregated precursor powders of the compound. These aggregates were calcined at 800, 850 and 900 °C to determine the phase evolution from amorphous to crystalline by X-ray diffraction (XRD). The morphology of aggregates was characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Moreover, through XRD it was determined that the crystallization of YAG phase started at about 800 °C without any intermediate phases. The powders were composed of spherical aggregates with an average diame- ter of 1 μm. From these powders, ceramic fibers with additions of 2at.% and 5at.% Nd, were extracted from the melt with diameters ranging from 30 μm to 50 μm.R. López J. Zárate E. A. Aguilar J. Muoz-Saldaa 2008Journal of Rare Earths2008,26,5:4
4Conservative management of perforated duodenal diverticulum: A case report and review of the literature显示文摘Duodenal diverticula are a relatively common condition. They are asymptomatic, unless they become complicated, with perforation being the rarest but most severe complication. Surgical treatment is the most frequently performed approach. We report the case of a patient with a perforated duodenal diverticulum, which was diagnosed early and treated conservatively with antibiotics and percutaneous drainage of secondary retroperitoneal abscesses. We suggest this method could be an acceptable option for the management of similar cases, provided that the patient is in good general condition and without septic signs.David Martínez-Cecilia Alvaro Arjona Sánchez Manuel Gómez álvarez Eva Torres Tordera Antonio Luque Molina Victor Valentí Azcárate Javier Briceo Delgado Francisco Javier Padillo Pedro López-Cillero Sebastián Rufián Pea 2008World Journal of Gastroenterology2008,14,12:2
5Fractionation of trace elements in some non-agricultural Australian soils显示文摘Li J Rate A W Gilkes R J 2003Australian Journal of Soil Research2003,41,:1
6Sorption of cadmiumC H ) and copper( H ) by soil humic acids : Temperature effects and sorption heterogeneity 显示文摘Rate A 2010Chemistry and Ecology2010,26,5:1
7Effect of equex STM paste on viability of frozen~thawed dog spermatozoa during in vitro in cubation at 38℃显示文摘Rate A Strom B Linde~Forsberg C 1997Theriogenclcgy1997,47,:1
8Commentary on Lindherg and Ludvigsen (2012)显示文摘Bennett PN Bonner A Moynahan I Uttrafittration rate is a poor indicator of haemodialysis nursing Iluality 2013Int J Nurs Stud2013,50,1:1
9The Ladle Refining Process for Alloyed Oil Country Tubular Goods at Nippon Kokan KK显示文摘Ishii A 'rate M 1983Iron and Steel Maker1983,,7:1
10Emission factor estimates of eereal waste burning in Spain显示文摘ORTIZ DE ZAH RATE I EZCURRA A LACAUX J P 2000Atmos Environ2000,34,:1
11Boothroyd C 显示文摘Smith CA de Lacey S Chapman M Acupuncture to im- prove live birth rates for women undergoing in vitro fertilization : a protocol for a randomized controlled trial 2012Trials2012,13,:1
12RNA-Seq analysis using De Novo Transcriptome Assembly as a reference for the Salmon Louse Caligus rogercresseyi显示文摘Gallardo-Escárate C Valenzuela-Mu(n)oz V Nu(n)ez-Acu(n)a G 2014PLOSONE2014,9,92:1
13显示文摘RODGER MA A VRUCH LI H 0 Pelvicm agnetic resonance venog-raphy reveals high rate of pelvic vein thrombosis after cesarean sectionWLEY HE 2006Am J Obstet Gynecol2006,194,43:1
14Cadmium accumulation in agricultural soils in Western Australia 显示文摘Mann S S Rate A W Gilkes R J 2002Water Air Soil Pollut2002,141,:1
15placebo 显示文摘Sesti F Capozzolo T Pietrop01]i A et aL Recurrence rate of endometri- oma aler lapamscopic cystectomy: a comparative randomized trial be- twecn post-operative hormonal suppression trvatment m' dietary therapy vs 2009Eur J Obstet Gynecel Repmd Biol2009,146,1:1
16The risk of gestational diabetes is established since fetal and postnatal period显示文摘 Zárate A 2003Gineeol Obstet Mex2003,71,:1
17Cadmium accumulation in agri- cultural soils in Western Australia 显示文摘Mann S S Rate A W Gilkes R J 2002Water Air and Soil Poilu- tion2002,141,:1
18Heat shock cognate protein 70 is involved in rotavirus cell entry显示文摘Guerrero C A Bouyssounade D Zárate S 2002Journal of Virology2002,76,:1
19Factors influencing success and anti-paternal antibodies in spontaneous recurrent miscarriage 显示文摘Chaichian S Shoaee S Saremi rate of leukocyte immunization A 2007Am J Reprod Immunol2007,57,3:1
20The atrial fibrillation follow-up investigation of rhythm management (AFFIRM) investigators 显示文摘A comparison of rate control and rhythm control in patients with atrial fibrillation 2002N Engl J Med2002,347,:1
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