Results 51 to 60 of about 9,563 (223)
Shuitu Baochi Xuebao, 2011 采用田间调查、土壤盆栽和大田试验相结合的方法,研究山西省主要类型土壤镁素供应状况及镁肥施用效果。结果表明,山西省主要类型土壤耕层(0-20cm)交换性镁含量在78.1～641.8mg/kg范围内,平均含量为255.1mg/kg。不同类型土壤交换性镁含量高低依次为潮土>褐土>栗褐土>石灰性褐土>黄绵土>褐土性土。土壤交换性镁含量与土壤主要化学性质密切相关。生物消耗试验表明,褐土和石灰性褐土的镁生物有效性较高,其次是褐土性土和黄绵土,栗褐土和潮土的镁生物有效性最低。与不施镁肥相比,施镁大豆增产2.77%～9.
丁玉川 +5 more
doaj
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Achieving a simultaneous enhancement of strength and ductility remains a critical bottleneck for the large‐scale and cost‐effective engineering application of magnesium alloys. In this work, guided by first‐principles calculations, we tailored the τ‐Mg32(Al,Zn)49 phase and optimised twin boundary, thereby designing and successfully ...
Yun‐Xuan Zhou +8 more
wiley +1 more source
Zhejiang Daxue xuebao. Lixue ban, 2013 系统总结了华南沿海琼、粤、闽、浙4省中生代镁铁质岩的时空分布与地球化学特征，分析讨论了华南中生代区域构造环境和地球动力学背景.区内主要发育6期镁铁质岩石，分别形成于早中生代和晚中生代，即245~230、180~175、165~142、130~115、110~101和95~85 Ma.早中生代印支期(245~230 Ma)镁铁质岩，出露在海南岛，伴有A型花岗岩和碱性正长岩产出，形成于印支运动后的伸展环境.在晚中生代(180~90 Ma)的镁铁质岩中，中侏罗世(180~175 Ma ...
MAXiao-xiong(马晓雄) +4 more
doaj +1 more source
Discursos Fotograficos, 2014 Resenha de: SILVA, Mylton Severiano da. Realidade - História da revista que virou lenda. Florianópolis: Editora Insular, 2013. 320 p.
openaire +3 more sources
Multi‐Functional S‐HA/ASTA NPs Coating on Biodegradable ZE21B Alloy for Cerebrovascular Applications
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Magnesium (Mg) and its alloys have attracted extensive attention of researchers in the field of cerebrovascular implants due to their good mechanical properties and biosafety. However, rapid degradation and delayed endothelialization pose challenges. To address these issues, this study introduces a multifunctional composite coating.
Aqeela Yasin +4 more
wiley +1 more source
Sexo é maldição, ódio é amor [PDF]
Revista Latinoamericana de Psicopatologia Fundamental, 2015 e o amor. Porem nao se trata do amor idealizado, mas sim daquilo que ele comporta de paradoxal, da sua face maldita, obscena e tragica. E no estudo das obras literarias de Nelson Rodrigues, Gregorio de Matos e Fernando Pessoa que este livro demonstra a afirmacao freudiana de que os artistas ja sabiam o que mais tarde a psicana-lise veio revelar: a ...
openaire +4 more sources
New Advances of Degradable Magnesium‐Based Metal Biomaterials in the Field of Orthopedics
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Based on their outstanding biomechanical properties and superior osteogenic activity, magnesium (Mg) and its alloys have been extensively investigated for their biocompatibility and therapeutic efficacy in treating fractures and bone defects.
Jia‐Nan Yu +8 more
wiley +1 more source
, 1995 一种纳米尺寸氮化镁的合成方法是在常压或５ＭＰａ以下的压力下，３００～６００℃反应条件下，以高活性镁粉与氮反应制得的。该反应过程也可以掺杂过渡金属化合物，如含Ｎｉ，Ｔｉ，或Ｃｏ元素的化合物，使上述反应的反应速度加快，过渡金属化合物的掺杂量为０．１～２０ｍｏｌ％。本发明合成氮化镁的方法，反应所需设备简单，反应条件温度易于控制，产物收率高，产物氮化镁的颗粒直径范围为３～３０ｎｍ ...
廖世健, 崔∴, 徐筠
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Gongye shui chuli, 2003 研究了在pH为10.5的硼砂-氢氧化钾缓冲溶液和乙醇的增敏作用条件下,偶氮氯膦Ⅰ与钙镁的吸收特性,建立了多波长吸光光度法同时测定钙镁的方法。采用两种矩阵算法对实验数据进行处理,并对结果进行比较和分析。钙镁质量浓度在0～1mg/L范围内用方法2能得到准确结果。
徐丽莉, 曹顺安
doaj +2 more sources
, 2007 本发明涉及氧化镁的制备，具体地说是一种鸟窝状单分散氧化镁的制备方法，在120～140℃加热体系下，在水溶液体系中，以可溶性镁盐和可溶性碳酸盐为原料，通过共沉淀反应生成碱式碳酸镁，再经过高温焙烧得到鸟窝状的单分散氧化镁。本发明操作简单，原料易得，所得产物粒径均一、形貌易控 ...
刘中民 +5 more
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