Results 131 to 140 of about 1,747 (185)

A CIÊNCIA É MASCULINA? É, sim senhora!...

open access: yesContexto & Educação, 2013
Partindo do princípio de que não somos sociedades machistas por acaso, são analisadas três vertentes que nos constituíram como humanos no mundo ocidental: a grega (os mitos e a Filosofia), a judaica (cosmogonia e a Torá) e a cristã (Apóstolo Paulo e outros doutores da Igreja Cristã).
openaire   +1 more source

东菲律宾海新型铁锰结壳中元素的赋存状态

open access: yes, 2007
为了解东菲律宾海新型铁锰结壳中元素的赋存状态,采用化学提取方法对3个结壳样品进行了物相分析.不同类型结壳中成矿和稀土元素的赋存状态总体一致,表明它们形成于相近的地质和海洋环境中.成矿元素中的Fe和Cu绝大部分赋存在残渣态中,Mn、Co和Ni则主要赋存在锰氧化物结合态、有机结合态和残渣态中,并且埋藏型结壳样品锰氧化物结合态中赋存了相对更高比例的成矿元素.三价稀土元素主要集中在锰氧化物结合态中.两个沉积物表层结壳样品中的Ce主要集中在残渣态中.而埋藏型结壳样品中的Ce则主要赋存在锰氧化物结合态中 ...
孟庆勇   +4 more
core  

Sex differences in association of mixed exposure to blood cadmium, lead, mercury, selenium, manganese with osteoporosis. [PDF]

open access: yesZhong Nan Da Xue Xue Bao Yi Xue Ban
Shi L   +7 more
europepmc   +1 more source

废碱锰电池焙烧过程中汞的形态研究

open access: yes, 2006
以废碱锰电池为试验材料,在小型管式炉中进行焙烧实验.借鉴燃煤中汞的形态研究分析方法(Ontario-Hydro分析法)研究了废碱锰电池焙烧过程中汞的形态及其分布.结果表明,汞脱除率达100%,尾气中总汞浓度为186.41~194.86mg·m^-3,Hg^0占气态汞总量的82.88%~86.64%,Hg^占6.02%~6.29%.研究结果说明在本试验条件下,废碱锰电池中的汞在焙烧+过程中绝大部分以单质形式进入尾气,实际生产中可直接将尾气通过强制冷却,使汞冷凝 ...
王德汉   +3 more
core  

氧化亚铁硫杆菌耦合砷黄铁矿还原浸出软锰矿

open access: yes, 2015
将氧化亚铁硫杆菌(T.f)用于砷黄铁矿与软锰矿共同浸出,设置无菌体系作为对照,提出有氧和无氧条件下Fe As S-Mn O2的反应模型。研究结果表明:氧化亚铁硫杆菌对砷黄铁矿还原浸出软锰矿具有明显的催化作用,在砷黄铁矿与软锰矿的质量比为1:3.6、反应p H为1.8的最优条件下,有菌体系下锰的浸出率达99%,后续金的氰化浸出率达95%以上;Mn2+会抑制细菌的生长,当ρ(Mn2+)≥30 g/L时,Mn2+对细菌有致死作用;从软锰矿与砷黄铁矿的循环伏安曲线可看出两矿均有明显的氧化还原峰 ...
冯雅丽   +4 more
core  

[Research progress on antioxidant therapy and prevention in noise- induced hearing loss]. [PDF]

open access: yesLin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi, 2021
Gu X, Dai Y, She M.
europepmc   +1 more source

Progress in research and development of biodegradable metallic vascular stents. [PDF]

open access: yesZhong Nan Da Xue Xue Bao Yi Xue Ban
Yang Y   +6 more
europepmc   +1 more source

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