Results 11 to 20 of about 7,097 (154)
É pique, é pique-bandeira fração
Instrumento: Revista de Estudo e Pesquisa em Educação, 2021 Este estudo tem como objetivo narrar a experiência da aplicação do jogo pique-bandeira fração construído a partir da perspectiva interdisciplinar entre as disciplinas Matemática e Educação Física em turmas do 5º ano do Ensino Fundamental de uma instituição federal de ensino.
Joycimar Lemos Barcellos Zeferino +1 more
openaire +2 more sources
Zhejiang Daxue xuebao. Lixue ban, 2007 讨论了以TAN为衍生试剂，用Triton X-114非离子表面活性剂浊点萃取富集铁（Ⅱ )、钴（Ⅱ )、镍（Ⅱ )的各种条件，并于ODS柱上，用内含4.5 m mol • L-1十六烷基三甲基溴化铵(CTMAB)和0.03 mol • L-1 pH5.5HAc-NaAc缓冲溶液的甲醇/水溶液（体积比为69 ： 31）作流动相，检测波长为565 nm，流速为0.8 mL • min-1，发展了浊点萃取-高效液相色谱法测定铁、钴、镍的新方法.在选定条件下，大多数离子不干扰测定，方法灵敏度高，对铁、钴 ...
XIEXia-feng(谢夏丰) +2 more
doaj +1 more source
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Vanadium‐bearing solid wastes (VBSWs) have emerged as a key research priority in resource recovery and environmental remediation because of their high resource value, large generation volume, and complex phase composition. However, practical utilization of these wastes still faces major challenges, including heavy environmental burdens, ill ...
Bowen Duan +7 more
wiley +1 more source
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Metal nanoclusters provide abundant catalytically active sites and unique electronic structures that are highly beneficial for enhancing photocatalytic performance; however, their practical application is often hindered by poor photostability.
Yiying Qin +6 more
wiley +1 more source
甘氨酸修饰大孔纤维素微球的制备及其对Cr3+、Fe3+的吸附研究
Gongye shui chuli, 2011 以碳酸钙固体颗粒为致孔剂，采用热熔胶转化再生纤维素法制备了大孔纤维素微球，并用甘氨酸修饰成阳离子吸附剂，以Cr3+、Fe3+为模型组分考察了该新型吸附剂的吸附性能。采用扫描电子显微镜对吸附剂的结构性能进行了表征，并探讨了吸附时间、初始浓度、温度、pH 对吸附性能的影响。结果表明，吸附在270 min 达到平衡，对Cr3+、Fe3+的饱和吸附量分别为52.5、48.9 mg/g，吸附过程可用Freundlich 等温方程拟合。
李江 +4 more
doaj +2 more sources
Glycerophosphocholine‐Mediated Dual Regulation for Highly Stable Aqueous Iron‐Ion Batteries
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Iron‐ion batteries (FeIB) offer the advantages of low cost and high capacity, demonstrating potential for large‐scale energy storage. However, severe hydrogen evolution reaction (HER) occurs during cycling, which significantly impacts battery lifespan.
Tian Yang +6 more
wiley +1 more source
Gongye shui chuli, 2003 提出一种用磺基水杨酸作显色剂测定循环水中铁的新方法, 试验结果表明:此方法的标准偏差小于3.0%, 相对标准偏差小于5.0%, 加标回收率为99%～102%;此方法所用仪器简单、所需药剂较少、简便快速, 具有较高的准确性, 可在生产实际中应用。
刘群, 余伟明
doaj +2 more sources
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Ultrathin, lightweight, and mechanically compliant electromagnetic interference (EMI) shields are increasingly required for high‐frequency electronic devices. However, conventional metallic shields predominantly rely on conductivity‐driven reflection mechanisms, which become ineffective at reduced thickness and may cause severe secondary ...
Zida Zhang +7 more
wiley +1 more source