Results 51 to 60 of about 25,613 (137)

Alleviation of phosphorus rather than nitrogen limitation driven by permafrost and landscape effects on Dahurian larch forests

open access: yesFunctional Ecology, Volume 40, Issue 8, Page 2590-2601, August 2026.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Permafrost thaw is reshaping nutrient dynamics in boreal forests, but its impacts on tree nutrient limitation and functional strategies remain poorly understood. Clarifying these responses is crucial for predicting the response of boreal forests to climate change.
Qiyue Fu   +9 more
wiley   +1 more source

Schiff碱过渡金属配合物催化磷酸二酯水解

open access: yes四川大学学报. 自然科学版, 2005
将冠醚单Schiff碱钴(II)和锰(III)配合物作为水解酶人工模型,研究它们催化磷酸二酯(BNPP)水解的反应动力学,提出了配合物催化BNPP水解的动力学数学模型,讨论了BNPP催化水解反应机理和配体中冠醚环的影响.
唐英   +5 more
doaj  

Perceived costs as drivers of wildlife management preferences in rural Tanzanian communities

open access: yesConservation Biology, Volume 40, Issue 4, August 2026.
Abstract Effectively managing human–wildlife interactions is crucial for fostering coexistence on shared landscapes. Management options are most effective when aligned with the preferences of people directly affected by wildlife, yet little is known about how socioecological factors influence these preferences.
Christian Kiffner   +10 more
wiley   +1 more source

金属胶束催化VII:双核配合物金属胶束催化PNPP水解反应动力学

open access: yes四川大学学报. 自然科学版, 2004
研究了由双核铜配合物和表面活性剂组成的金属胶束催化PNPP水解的动力学和机理.提出了含两个水分子的双核铜配合物催化PNPP水解的动力学数学模型.结果表明:金属胶束催化PNPP水解是分子内反应;两个铜离子在催化PNPP水解过程中具有协同效应;由草酰胺桥联双核铜配合物与表面活性剂组成的金属胶束在催化PNPP水解中表现出高的活性.
胡伟   +5 more
doaj  

Does public participation foster stakeholder support for policy proposals? Evidence from the European Union

open access: yesPolicy Studies Journal, Volume 54, Issue 3, August 2026.
Abstract We examine whether and how public participation in policymaking contributes towards fostering stakeholder support for policy proposals formulated in the bureaucratic arena. We explain how key markers of procedural fairness describing both the participation process and policymakers' presentations of it during the decision justification stage co‐
Adriana Bunea, Idunn Nørbech
wiley   +1 more source

复合水解酸化-CASS工艺处理高比例印染废水的应用

open access: yesGongye shui chuli, 2020
通过在原水解酸化池中安装弹性填料并增加泥水分离池,将CASS池剩余污泥排放至水解酸化池等改造措施,采用复合水解酸化-CASS组合工艺处理高比例印染废水。改造后的运行结果表明,复合水解酸化池显著提高了废水的可生化性,BOD5/COD能稳定达到0.4左右,并使得后续的CASS工艺极大提升了对废水中有机污染物的去除率。改造后的系统出水稳定,达到《城镇污水处理厂污染物排放标准》(GB 18918-2002)一级A排放标准。
苏大雄, 张超
doaj  

完全活性污泥法处理含海水污水的基质降解动力学研究

open access: yesGongye shui chuli, 2000
作者采用完全混合活性污泥法研究了大生活用海水进入城市污水系统后,不同海水盐度下污水的基质降解动力学。得出了污水中分别含 12 %、24 %和 36%海水时的基质降解速率常数和基质降解动力学模型。随着污水中海水比例的增大,基质降解速率常数逐渐变小。
张雨山, 王静, 徐梅生
doaj  

聚醚桥连二异羟肟酸配合物催化PNPP水解的动力学研究

open access: yes四川大学学报. 自然科学版, 2005
将4种聚醚桥连二异羟肟酸过渡金属铜(II)、锌(II)、钴(II)和锰(II)配合物作为仿水解酶模型催化羧酸酯(PNPP)水解.探讨了聚醚桥连二异羟肟酸过渡金属配合物催化PNPP水解的动力学和机理;提出了配合物催化PNPP水解的动力学模型.结果表明,在25℃条件下随着缓冲溶液pH值的增大,配合物催化PNPP水解速率提高,并表现出好的催化活性.
雷光东   +6 more
doaj  

Schiff碱钴(Ⅱ)配合物催化PNPP水解研究

open access: yes四川大学学报. 自然科学版, 2007
在pH7.0~8.2和25℃下,用分光光度法研究了两种带冠醚环或吗啉环的Schiff碱钴(Ⅱ)配合物CoL1和CoL2,作为模拟水解金属酶,对羧酸酯水解的催化作用.通过对水解反应体系的特性吸收光谱的分析,提出了PNPP的催化水解的机理,并在此机理上建立了PNPP催化水解的动力学数学模型.讨论了两种Co(Ⅱ)配合物催化水解PNPP的性能,动力学和反应机理.
王莹, 胡伟, 邹立科, 胡常伟
doaj  

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