Results 21 to 30 of about 31,551 (216)
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Transition metal‐based amorphous/crystalline (a/c) heterostructured catalysts have garnered significant attention due to their exceptional activity, stability, and cost‐effectiveness. However, the precise synergistic regulation of interfacial composition and phase states remains challenging.
Haoran Li +3 more
wiley +1 more source
Shuitu Baochi Xuebao, 2011 在自然降雨条件下研究澄江尖山河流域4种不同土地类型输出地表径流的TN、TP、NO3--N、NH4+-N及溶解态磷(DP)的特征,并利用TN/TP和Inorganic-N/DP、NO3--N/DP、NH4+-N/DP等比率对4种土地类型输出径流的养分限制性和富营养化风险进行分析。结果表明,不同土地类型在防治不同土壤养分流失的能力上存在差异,NO3--N、NH4+-N、DP的输出浓度随着径流中TN、TP浓度的增大而增大;人工林和次生林输出的径流对抚仙湖水生自养生物的生长具有磷元素限制性 ...
白荣, 郎南军, 邵智
doaj
Flame Retardant Modification of Epoxy Using Phosphorus-containing POSS-based Polymers [PDF]
, 2015 环氧树脂因其具有良好的粘结性、化学稳定性、低收缩、优异的机械性能、易加工成型和成本低廉等优点，而广泛应用于粘结剂、涂料及电子封装等领域，但是由于环氧树脂存在内应力大、质脆，耐热性及阻燃性能不足而使得其应用受到限制。传统含卤素尤其是含溴阻燃剂虽被证明有很好的阻燃效果并得到广泛应用，但研究发现其在燃烧时会生成有毒物质，使得含卤阻燃剂的使用受到限制。建立新型无卤、无毒的环氧阻燃体系已成为科研工作者关注的研究热点之一。 本文以DOPO（9,10-二氢-9-氧杂-10-磷杂菲-10-氧化物 ...
陈国荣
core
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT CoP has become a research hotspot for supercapacitor electrode materials because of its considerable theoretical capacitance and metalloid nature, but its commercial application remains hampered by structural instability and sluggish ion kinetics.
Gaoliang Wang +8 more
wiley +1 more source
Shuitu Baochi Xuebao, 2011 大量施用农业化学物质在提高作物产量的同时,也导致了严重的水体污染。在北京地区不同坡度的径流小区上,通过人工模拟降雨试验,研究免耕、草篱、以及免耕与草篱复合3种措施对农田径流中氮、磷、阿特拉津3种典型农业面源污染物的去除效果。结果表明:免耕措施可减少53%的总氮、51%的总磷和56%的阿特拉津流失;草篱措施可减少68%的总氮、61%的总磷和90%的阿特拉津流失;而免耕与草篱复合措施可减少77%的总氮、76%的总磷和92%的阿特拉津流失。另外,总氮、总磷和阿特拉津流失量均与径流量呈显著的线性正相关关系 ...
李霞 +4 more
doaj
Şehir Göstergelerinin (Ç)evrilmesi: Bir İstanbul Anlatısının Başkalaşmış Yüzleri
Söylem Filoloji Dergisi, 2022 Bir eserde olayların geçtiği uzamın rastgele seçilmeyeceği düşünülürse, kurgusal veya gerçek uzamın temsil ettiği mekânla bağlantısı dikkat edilmesi gereken bir husustur. Ayrıca şehri konu alan eserlerde kimi zaman sadece şehrin değil, o kültüre ilişkin belli kalıp yargıların da ortaya koyulduğu bir gerçektir.
Didem TUNA, Begüm ÇELİK ÖZKAN
openaire +3 more sources
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT The limited osteogenic capacity of magnesium phosphate cement (MPC) has constrained its biomedical applications, underscoring the necessity to develop MPC with enhanced physical properties and bone‐forming capabilities. In this study, a multifunctional MPC system was developed by incorporating zoledronic acid‐loaded near‐infrared (NIR ...
Bin Wang +8 more
wiley +1 more source
干旱河谷-山地森林交错带植被调控模式对土壤氮、磷强度及库的影响
Shuitu Baochi Xuebao, 2011 以调控30个月的4种典型调控模式以及未调控退耕纯林为研究对象,比较分析了不同调控模式下氮、磷供强度及库容特征.结果表明,相对于纯林模式,4种调控模式均可有效缓解缺氮少磷的土壤现状,提高或增加了固氮效率以及氮、磷储量,且表现出氮、磷元素聚表分布(0-10 cm)的特征;表层土(0-10cm)中,刺槐+扁桃+紫花苜蓿模式的氨态氮含量(10.52士0.34 g/kg)、硝态氮含量(11.69±1.06 g/kg)显著高于其它模式,对植物生长极为有利,但对氮、磷的储存贡献较小;刺槐+新疆杨 ...
刘彬 +7 more
doaj
Shuitu Baochi Xuebao, 2020 稻-麦轮作是太湖流域典型的集约化粮食作物种植体系，化肥用量大，氮磷流失控制广为关注。采用大区田间对比试验，研究了习惯施肥（FP）和优化控制施肥（CM）2种施肥模式对作物产量及氮磷肥料偏生产力的影响，同时探讨了2种施肥模式下农田径流水中各形态氮、磷的特征和径流氮、磷损失的差异。结果表明：优化控制施肥水稻和小麦地上部总生物量、籽粒产量、植株地上各部位养分（氮磷钾）含量及积累量与习惯施肥差异不显著（P>0.05）；优化控制施肥水稻和小麦的氮肥偏生产力显著大于习惯施肥 ...
王新霞 +6 more
doaj
Synthesis and Characterization of the Novel Transition-Metal Fluorine-Containing Phosphates and Borophosphates [PDF]
, 2016 一维管状结构的材料凭借其独一无二的结构和优良的性能现已成为材料领域的研究热点，例如典型的一维管状材料碳纳米管在催化、吸附、储氢等领域都有着极大的潜在应用价值。由此，本文致力于合成一维管状材料。通过调控反应体系中的原料配比，成功将氟离子引入晶体结构，合成出具有孤立的一维管道结构的新型铁氟磷酸盐晶体，该结构十分罕见。氟的引入，为合成低维度的高化合价过渡金属氟磷酸盐提供了一种新思路。 （1）本文首先通过水热法合成铁磷酸盐SrFeH(PO4)2(H2O)x(x≈0~0.5)，该化合物的晶体结构为二维层状结构 ...
陈婷荷
core