Results 1 to 10 of about 3,631 (92)
Abstract Background In humans, the acidic pH of the ear canal plays a protective role against infection and a change towards alkalinity of the external auditory canal (EAC) is a local factor in the progression of acute to chronic otitis externa (OE).
Pauline Panzuti +5 more
wiley +1 more source
以皇竹草为原料制备活性炭(PAC),采用氯氧化锆(ZrOCl2·8H2O)和十六烷基三甲基溴化铵(CTAB)对其联合改性,制备出复合材料Zr-CTAB-PAC,探讨了吸附剂投加量、接触时间、pH、磷酸盐和硝酸盐初始浓度等因素对Zr-CTAB-PAC吸附水中硝酸盐及磷酸盐性能的影响。结果显示,Zr-CTAB-PAC是一种比表面积大、含有多种含氧官能团的材料,可同时吸附水中的硝酸盐及磷酸盐。在pH为5~9、Zr-CTAB-PAC用量为0.3 g、初始磷酸盐和硝酸盐质量浓度分别为15 mg/L和30 mg/L、
李建敏 +6 more
doaj +2 more sources
火电厂磷酸盐水化学工况从最初的协调磷酸盐处理到最后的平衡磷酸盐处理、低磷酸盐处理的发展过程实际上是从高磷酸盐处理到低磷酸盐处理的一个发展过程。作者对磷酸盐暂时消失现象发生的原因及实质进行了探讨,并介绍了为避免磷酸盐暂时消失现象发生而提出的几种方法,讨论了不同磷酸盐处理的原理、控制指标及实用效果,对各种处理方法进行了比较。结果表明,平衡磷酸盐处理 (或超低磷酸盐处理 )是首选的炉水处理方式。
林根仙, 管淑敏
doaj +2 more sources
Read the free Plain Language Summary for this article on the Journal blog. Abstract Soil organic nitrogen (SON) transformation is critical for global nutrient cycling and ecosystem productivity, yet how its responsiveness to climate change differs across diverse land use types remains poorly resolved.
Xinyi Yang +10 more
wiley +1 more source
Read the free Plain Language Summary for this article on the Journal blog. Abstract Anthropogenic nitrogen (N) deposition is a major driver of global change. However, its effects on the developmental plasticity of plant nutrient strategies remain poorly understood.
Quan Li +11 more
wiley +1 more source
ABSTRACT Thermo‐responsive hydrogels based on poly(N‐isopropylacrylamide) (PNIPAM) are promising candidates for soft actuation, yet their practical applications are often constrained by sluggish thermo‐responsive kinetics and insufficient mechanical robustness.
Hui Liu +5 more
wiley +1 more source
针对水体富营养化现象,以青霉素菌渣为原料制备生物炭,通过共沉淀法在所制备生物炭上负载铁、锆离子,得到了一种新型除磷吸附剂ZrFe-HBC,研究了其对水中磷酸盐的吸附特性及吸附机理。结果表明,ZrFe-HBC具备多层级孔隙结构,铁、锆离子以氧化物形式结合于生物炭之上。ZrFe-HBC吸附磷酸盐的过程符合准二级动力学和Freundlich模型,为多分子层的化学吸附,在25 ℃时饱和吸附量为18.26 mg/g。ZrFe-HBC对磷酸盐的吸附量随pH降低而增加,适合在酸性条件下对磷酸盐进行吸附处理 ...
刘艳芳 +6 more
doaj +2 more sources
Jellyfish blooms restructure plankton dynamics and trophic linkages in coastal waters
Read the free Plain Language Summary for this article on the Journal blog. Abstract Jellyfish blooms are increasing globally in frequency and intensity, introducing complex ecological interactions, yet the mechanisms by which they alter ecosystem structure remain poorly characterized due to a lack of sustained field observations.
Pengpeng Wang +4 more
wiley +1 more source
测定循环冷却水中聚磷酸盐含量的新方法——差示分光光度法直接测定聚磷酸盐
本文在考察了正磷酸盐和聚磷酸盐在铝兰测定法中显色特性差异的基础上,建立了不同还原剂用量的差示分光光度法。该方法可直接测定循环冷却水中的六偏磷酸盐、三聚磷酸盐或者六偏与三聚的含量,省去了测定正磷的步骤。方法简便快速,准确度高,回收率为98~102%,工作曲线线性范围为0.04~50ppm。可能共存的正磷酸根及硅酸根等离子对本方法不产生干扰。
王占文, 陈玉銮, 于志刚
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ABSTRACT Driven by global energy transition and sustainability, sodium‐ion batteries (SIBs) have emerged as key alternatives to lithium‐ion batteries for low‐to‐medium energy storage, because of abundant sodium resources and low cost. However, their commercialization is hindered by the lack of anodes with high capacity, fast kinetics, and long‐term ...
Shuang‐Lin Cai +13 more
wiley +1 more source

