Results 111 to 120 of about 1,886,537 (208)

黑三棱内酯B衍生物及其制备方法和用途

open access: yes, 2015
本发明涉及一种天然产物黑三棱内酯B衍生物及其制备方法和用于制备抗肿瘤药物的用途。其结构式如下:其中R为氢、C1-6烷基、C3-6环烷基、C5-10芳基、吡啶基、CnH2nX、OR1或NR2R3,其中,n为1-6,X为乙烯基、乙炔基、C5-10芳基、含1-4个氮原子和1-5个碳原子的氮杂芳基、羟基、C1-4烷氧基、氨基、N,N-双C1-4烷基氨基、羧基、酰胺基、磺酰胺基、C1-4烷基氧羰基、氰基或硝基,R1为氢、C1-4烷基、苄基或甲氧基苄基,R2和R3分别为氢、C1-4烷基、苄基、甲氧基苄基或R2 ...
王超, 孙健
core  

From pollen provision to pollinator: Species‐specific sterol assimilation by wild bees in urban landscapes

open access: yesFunctional Ecology, Volume 40, Issue 6, Page 1906-1920, June 2026.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Human‐driven landscape change, particularly urbanization, is reshaping pollinator communities, yet the functional traits that mediate species persistence remain poorly understood. Dietary specialization is commonly used to predict species vulnerability.
Yan Yang   +5 more
wiley   +1 more source

改性生物炭对废水中重金属的吸附

open access: yesGongye shui chuli, 2018
简述了生物炭的制备条件,讨论了生物炭的主要改性方法(化学法、添加改性剂法及改变外界条件),分析了各改性方法的主要优点,总结了改性生物炭对废水中重金属的吸附效果。实验结果表明,改性生物炭对废水中重金属吸附效果较好,重金属的最大去除率可达99.81%。另外,探讨了改性生物炭的吸附机理、影响因素和吸附等温式,并提出了未来生物炭吸附废水中重金属需要研究的方向以及改性生物炭的应用前景。
李仕友   +4 more
doaj  

一种微生物燃料电池及其用于处理废水的方法

open access: yes, 2015
本发明涉及一种微生物燃料电池及其处理废水的方法,所述电池包括主反应区1、生物选择调节区2、溢流出水槽3、穿孔布水管4、生物阳极5、空气阴极6、电极支架6a、电极卡槽6b、阴阳极电极插孔密封圈7、参比电极8、PH及DO电极插孔9‑I和II、外电阻10、进水管11、监测口12、排空管13和14、出水管15;本发明的方法利用毛细作用巧妙地避免了MFC的阴极曝气,减少能耗,提高了MFC阴极氧气传质效率;可稳定高效脱氮除碳,COD的去除率可达到75~94.4%,总氮(TN)去除率42~99.9%
杨暖, 何晓红, 李大平, 占国强
core  

Rapid construction of insect–plant interaction networks via multiplexed long‐fragment DNA metabarcoding and NGS

open access: yesMethods in Ecology and Evolution, Volume 17, Issue 6, Page 1896-1909, June 2026.
Abstract Molecular identification of insect food webs can accurately reveal complex trophic interactions and serve as a foundation for understanding ecosystem functioning and advancing biodiversity conservation. This process typically involves DNA library construction, high‐throughput sequencing and subsequent steps, including data assembly, annotation,
Xiao‐man Zhang   +9 more
wiley   +1 more source

一种蒽林并环衍生物及其合成方法

open access: yes, 2010
本发明公开了一种重要的抗银屑病药物蒽林的并环衍生物的合成方法,并合成了一些新的蒽林并环衍生物。以蒽林(二羟蒽酚、1,8,9-蒽三酚)为起始原料,与1-苯乙炔基Fischer卡宾化合物反应,经过连续加成/环化反应以及氧化脱金属反应,得到了四种新型的蒽林并环衍生物。本发明方法利用1-苯乙炔基Fischer卡宾化合物的多反应性,使其与蒽林在温和条件下发生连续多步反应,得到了利用传统有机合成方法难以合成或者需要复杂合成步骤才能得到的蒽林并环衍生物。本发明合成反应条件温和、操作简便、原料易得、效率高 ...
罗宁, 余正坤
core  

Prioritizing bat roosts for conservation with a global multicriteria bat roost priority index based on community science

open access: yesConservation Biology, Volume 40, Issue 3, June 2026.
Abstract Prioritization in conservation is crucial for the development of efficient and effective decision‐making policies. For many decades, the importance of some species and their habitats has been assessed and applied in conservation legislation, but bats and their diurnal roosts have ofbeen overlooked.
David López‐Bosch   +6 more
wiley   +1 more source

同步脱氮除磷技术研究进展

open access: yesGongye shui chuli, 2019
为避免造成水体富营养化,污水排放前必须进行脱氮除磷处理。与传统技术相比,新型同步脱氮除磷技术具有能耗低、占地小等特点,是污水处理领域中新的工程应用方向。介绍了生物法、物理化学法、生物电化学法和生物诱导矿化法4类同步脱氮除磷技术的原理、特点及影响因素。其中,生物诱导矿化法作为新型的生物-矿物结晶耦合处理技术,在降低运行成本和磷资源回收方面具有较大的优势,成为污水脱氮除磷领域的研究热点。
林岚, 张彦隆, 曹文志, 欧阳通
doaj  

一种由1,2-二氢吡啶制备吡啶衍生物的方法

open access: yes, 2014
本发明涉及一种制备吡啶衍生物的方法,具体地说是由1,2-二氢吡啶衍生物通过脱掉亚磺酸分子制备吡啶衍生物的新方法。原料1,2-二氢吡啶衍生物不使用金属催化剂 ...
吴凡, 万伯顺, 信晓义
core  

A link between increased temperature and avian body condition in a logged tropical forest

open access: yesConservation Biology, Volume 40, Issue 3, June 2026.
Abstract The combined effects of anthropogenic disturbances, such as logging and climate change, remain poorly understood; yet, they are the main threats to tropical biodiversity. Most tropical African countries lack long‐term climate data, so climate impacts on biodiversity cannot be assessed.
Moreen Uwimbabazi   +7 more
wiley   +1 more source

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