Results 51 to 60 of about 17,790 (198)
Shuitu Baochi Xuebao, 2011 通过分析添加含铁材料(Fe2O3、Fe2(SO4)3)和稀土材料(CeCl3、LaCl3)后矿区污染土壤中交换态砷(As)含量和土壤pH值的变化规律,研究这2类材料对矿区土壤As的固定效果以及对土壤性质的影响。结果表明,Fe2O3对As固定效果不明显,当Fe2O3最大添加量为8g/kg(分别按Fe计)时,土壤中交换态As含量仅降低了3.81%,其他3种材料在本试验条件下表现出良好的效果,其中Fe2(SO4)3和LaCl3固定As的效果相当,CeCl3次之。当这3种材料的添加量分别为2,4,8g/kg ...
文武 +5 more
doaj
Diversidade e EducaçãoO artigo tem como objetivo fornecer subsídios legais para os/as educadores/as enfrentarem os desafios impostos por um contexto sociopolítico reacionário, promovendo práticas pedagógicas que valorizem a diversidade, os direitos humanos e a igualdade de gênero na escola.
Gabriela Bieger Reyes +2 more
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, 2016 对铬铁酸浸液除铁所得草酸亚铁进行氧气氧化?氨浸处理,回收除铁剂草酸盐并用其制备氧化铁黑颜料.考察了氨水用量、反应温度、液固比、反应时间、氧气流量、反应液p H值及晶化温度等对C2O42?浸出率和氧化铁黑质量的影响.结果表明,反应液经60℃晶化处理后,在反应温度80℃、氨水与草酸亚铁摩尔比为3、液固比5 m L/g、氧气流量0.1 L/min、p H值6.9?7.4、反应时间3 h的条件下,C2O42?的浸出接近100%,得到的氧化铁黑质量与国产722氧化铁黑产品相当.
张洋 +4 more
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Multimodal Deep Learning‐Assisted Microstructural Evaluation System for Sintered NdFeB Magnets
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT The performance of sintered NdFeB magnets, especially coercivity, is critically determined by their complex microstructure. However, a quantitative microstructural evaluation system (MES) is much needed but has long been missing in the community.
Zihao Wang +8 more
wiley +1 more source
, 2000 分析了钢铁工业的能耗和大气污染物排放量。结果表明：钢铁工业的能耗、污染物排放量远高于工业部门平均水平；在钢铁工业内部，炼铁系统的污染最严重，能耗最高。１９９６年全国重点钢铁企业吨铁净能耗（标煤）为７０４ ｋｇ，其中２９．５ ％ 用于烧结和焦化工序，且在提高原料的理化性能之后，未得到充分回收和利用，是炼铁系统能耗高的一个重要原因。炼铁系统的颗粒物和ＳＯ２ 的排放量分别占钢铁工业总排放量的６８．２ ％和７３．７ ％ ，吨铁颗粒物和ＳＯ２ 的排放量分别为７．４ ｋｇ 和７．７ ｋｇ。但是 ...
张夏, 郭占成
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Journal of Ecology, Volume 114, Issue 8, August 2026.Ectomycorrhizal roots of Pinus armandii release more carboxylates than non‐mycorrhizal root segments, mobilizing Al‐bound inorganic P. Under the lowest available P conditions, they also secrete more phosphatase, promoting the mineralization of Al‐bound organic P.
Jun Zhou +7 more
wiley +1 more source
波尔多液营养保护剂对石灰性土壤铜、铁有效性及花生产量的影响研究
Shuitu Baochi Xuebao, 2006 选用山东省花生主产区的代表性石灰性土壤，通过土培试验的方法，研究了波尔多液营养保护剂BNPP和美国铜基杀菌剂Koeide两种可湿性粉剂对石灰性土壤pH值和铜、铁有效性及其对花生产量的影响。结果表明，与CK（喷清水）相比，喷施BNPP后，土壤pH值有所降低，而土壤有效铁、铜含量都有所提高。同时喷施BNPP后土壤有效铜含量要低于Kocide处理。另外．BNPP处理花生叶绿紊、活性铁、全铁含量以及生物量都有显著提高，产量比CK提高了1．25～1．53倍。波尔多液营养保护剂效果要优于美国Kocide产品。
段路路, 张民, 杨越超, 陈海宁
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Enhanced Magnetocaloric Effect in Tb‐Co‐Ni Magnets via Chemical Pressure
Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT Magnetic refrigeration materials are significantly needed in versatile modern industries, including scientific research, aerospace, and health care, due to their potential applications in gas liquefaction and storage. Herein, a significantly enhanced magnetocaloric effect with a suitable operation temperature range of 53–114 K and a giant ...
Lei Xi +11 more
wiley +1 more source
四川大学学报. 自然科学版, 2005 采用密度泛函理论中原子簇嵌入模式的电荷自洽变分DV-Xα方法(Self-ConsistentofCharge-Discrite Variation-Embedded Cluster Model),对bcc结构用fcc结构的铁在较高压强范围内的物理参量进行了计算,得到了系统的总能随体积变化的关系,以及压强与体积的关系曲线;根据计算结果,作者得到平衡条件下,铁体心结构(bcc)晶格常数为2.75,面心结构(fcc)晶格常数为3.377;并推断出体心结构铁在17.75GPa压强下,可能转变成面心结构铁 ...
陈慧娟, 廖志君, 伍登学
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Discursos Fotograficos, 2014 Resenha de: SILVA, Mylton Severiano da. Realidade - História da revista que virou lenda. Florianópolis: Editora Insular, 2013. 320 p.
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