Results 41 to 50 of about 2,846 (161)
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT The sluggish kinetics of the oxygen reduction reaction (ORR) necessitate developing oxygen electrodes with enhanced electrocatalytic activity for practical zinc–air battery applications. In this study, an iron‐doped copper sulfide electrocatalyst (CuFeNS‐PNC) anchored on metal–organic framework‐derived carbon substrates was designed, featuring
Taichong Chitboonyakasem +4 more
wiley +1 more source
Study of the Diversity of Exopolysaccharide-producing Bacteria in South China Sea and the Bioavailability of Representative Bacterial Exopolysaccharide [PDF]
, 2014 海洋溶解有机物质（DOM）在海洋碳的生物地球化学循环中占有重要地位。储存在DOM中的碳可以与大气中的CO2相当，是海洋最大的有机碳库。海洋细菌生产的胞外多糖（EPS）是高分子量的糖类聚合物，是重要的DOM成分之一。EPS不仅为微生物提供适于其生存活的微环境，同时参与海洋中各个生物化学过程，对海洋物质与能量循环具有重要生态意义。海洋细菌普遍具有合成分泌胞外多糖的能力，然而海洋细菌生产的EPS对DOM的贡献尚不明确。关于EPS生产菌株的报道目前主要集中在从极地、热泉、冷泉等极端环境地区分离出来的菌株 ...
陈弋
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Porous Mn2O3@C Cathode With High Activity and Long Lifespan for Aqueous Zinc Ion Batteries
Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT Manganese‐based oxides are widely employed as cathode materials for aqueous zinc ion batteries (AZIBs) due to their low toxicity and high theoretical specific capacity. However, their inherent poor electrical conductivity, coupled with the dissolution of manganese into the electrolyte, often leads to structural degradation of the cathode.
Cheng‐Jie Yin +5 more
wiley +1 more source
Shuitu Baochi Xuebao, 2016 为了解若尔盖高寒草地沙化对土壤活性有机碳组分的影响，采用空间代替时间的方法，通过野外土壤采集，并结合室内化验分析，研究了若尔盖高寒草原不同沙化阶段土壤有机碳及其活性组分的含量和变化特征。结果表明：沙化对高寒草地0—60 cm土层土壤有机碳含量具有显著影响，随沙化程度加剧，土壤总有机碳、溶解性有机碳、易氧化有机碳和微生物量碳含量均呈现显著下降的特征，极重度沙化阶段较潜在沙化阶段分别减少了74.76%，80.24%，76.02%和83.24%；活性有机碳组分的损失较土壤总有机碳明显 ...
费 凯 +5 more
doaj
On the dissolved carbohydrates and the decompositon of dissolved organic matter in the Pearl River estuary, China [PDF]
, 2007 碳水化合物是生物圈中分布最广的生化物质，也是构成溶解有机物(DOM)的最不稳定的组分之一。本文调查了珠江口夏季(2005年8月)和春季(2006年3月)水体中溶解单糖、多糖及总糖浓度。针对珠江口上游区域常年存在的表层缺氧现象，通过在暗条件下DOM降解的现场培养实验，研究上游区DOM的可利用性、特别是DOM的降解及耗氧情况。 夏季上游单糖浓度范围4.5~36.0μMC，占溶解有机碳(DOC)比例范围3~7%，多糖浓度范围14.9~103.7μMC，占DOC比例范围8~22%，总糖浓度范围20.5~139 ...
陈洪梅
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Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT Sodium‐ion capacitors (SICs) offer high energy and power density with long cycle life, but developing kinetically compatible electrodes remains challenging. This work developed a simple and sustainable strategy to synthesize homologous carbon electrodes from the inner shells of durian husks (ISDH) for high‐performance SICs.
De‐Bing Yan +7 more
wiley +1 more source
Shuitu Baochi Xuebao, 2006 主要分析不同森林植被下有机碳的分解动态和土壤碳库各组分大小、周转时间。结果表明：土壤样品培养90天，CO2累计释放量表层大致为1723～5065mg／kg、下层大致为178～642mg／kg。分解速率总的趋势是前期快，后期慢，表层明显大于下层。大小顺序为：冷杉林〉针阔混交林和阔叶林〉针叶林。在不同植被下的表层和下层土壤中，活性碳占总有机碳的0．54％～1．67％，0．45％～5．48％．平均驻留时间为11～56天、60～88天；缓效性碳占总有机碳的23．0％～63．3％，33．2％～72．2 ...
邵月红 +3 more
doaj +2 more sources
, 2019 微生物是驱动海洋元素循环的主体,在调节全球气候变化中起着重要作用.近半个世纪海洋研究的一个谜团就是"为什么有着一个相当于大气CO2碳总量的惰性溶解有机碳(Recalcitrant Dissolved Organic Carbon, RDOC)库在海洋中长期存在?".生物泵(Biological Pump, BP)和微食物环(Microbial Loop, ML)研究加深了我们对生物在海洋碳循环中作用的理解,但直到微型生物碳泵(Microbial Carbon Pump, MCP)理论的提出 ...
刘纪化, 孙军, 张传伦, 蔡阮鸿
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Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT Carbon dots (CDs) have emerged as promising modifiers for boosting the photocatalytic H2O2 production, yet their precise role remains to be quantitatively elucidated. Herein, S, N‐codoped lignin‐derived carbon dots (SN‐LCDs) and lignin‐derived carbon dots (LCDs) were synthesized and employed to modify TiO2.
Bin‐Peng Zhang +6 more
wiley +1 more source
, 2012 气候变化受到全球关注,大气CO2含量与气候变化息息相关.海洋是地球上最大的活跃碳库,在气候变化中扮演着举足轻重的作用,一个根本的机制就是生物固碳.然而,海洋浮游植物光合固碳量远远大于海洋调节大气CO2的能力和容量.本文指出,“固碳“不等于“储碳“,只有长期储存在海洋中的那部分碳才能对气候变化起到调节作用.但已知的海洋储碳机制(包括依赖于理化过程的“溶解度泵“以及依赖于颗粒有机碳沉降的“生物泵“等)并不能解释海洋碳汇有关的若干现象和问题.究其原因,还在于没有认识占海洋总有机碳90%以上的溶解有机碳(dOC)
焦念志
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