Results 91 to 100 of about 1,857,802 (193)
考察了零价铁和生物填料的投加对洁霉素废水水解酸化处理效果的强化作用,试验在3个平行的反应器中进行:投加零价铁的反应器(R1)、投加生物填料的反应器(R2)以及普通反应器(R0)。结果表明:在稳定运行时期,R1和R2的COD去除率、酸化率和出水B/C均明显高于R0。零价铁和生物填料的投加都对水解酸化起到了强化作用,提高了废水的可生化性,同时也都提高了反应器抗水质冲击负荷的能力。
郜白璐, 买文宁, 程婷, 唐启
doaj
微波强化甲烷氧化偶联-乙烷二氧化碳氧化脱氢耦合反应制乙烯工艺
一种微波强化甲烷氧化偶联-二氧化碳氧化乙烷脱氢耦合反应制乙烯工艺,依下述过程进行:含甲烷、氧气反应气首先在甲烷氧化偶联催化剂作用下进行甲烷氧化偶联反应;产物不经分离和换热与含乙烷气直接混合,在二氧化碳氧化乙烷脱氢催化剂作用下,生产乙烯;先用常规加热方式将催化剂加热并维持在某一温度300~700℃,再馈入微波能用来触发并维持反应。本发明可以强化甲烷氧化偶联-二氧化碳氧化乙烷脱氢制乙烯反应,特别是第二段的二氧化碳氧化乙烷脱氢吸热反应,提高乙烷处理量,进一步提高乙烯收率 ...
田志坚 +9 more
core
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
本发明涉及通过多相催化氧化制备环氧化物的化学反应过程,具体地说是一种催化氧化官能化烯烃生成环氧化物的方法;在有机溶剂中以工业用三氯异氰脲酸作为环氧化试剂,以负载在氧化铝上的氟化钾为固体碱,催化氧化官能化烯烃生成环氧化物,反应温度为0~80℃,反应时间为0.1-20h。本发明的优点为:原料的转化率高,目标产物的选择性好,反应时间短,效率高、反应条件温和,操作易于控制、成本低,整个过程对环境没有污染 ...
张国富 +4 more
core
A link between increased temperature and avian body condition in a logged tropical forest
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
一种4-吡啶甲醇衍生物的制备方法,是由4-氰基吡啶在碱金属钠或锂作用下,在适当的醚类溶剂中,与酮、醛发生脱氰基羟烃基化反应,一步合成产物。这咱方法反应条件温和,反应过程简单,产率高 ...
曾宪谋, 顾以健, 蔡家强
core
Abstract Recognition and engagement of Indigenous Peoples and local communities (IP&LCs) and other traditional knowledge (TK) holders in formal biodiversity governance remain limited, despite their significant contribution to the conservation and sustainable use of biodiversity through their knowledge, innovations, practices, and land stewardship.
Kinga Öllerer +8 more
wiley +1 more source
近年来,分子标记、基因克隆、RNA干扰和基因芯片等分子生物学技术已应用于蕨类植物的系统进化、遗传多样性、孢子萌发以及生理代谢分子机制的研究。本文介绍近年来分子生物学技术在蕨类植物研究中的应用进展。中文核心期刊要目总览(PKU)中国科技核心期刊(ISTIC)中国科学引文数据库(CSCD)006625 ...
戴绍军, 刘红梅, 石雷, 杜红红
core
Representation of obligate groundwater‐dwelling copepod diversity in European protected areas
Abstract Groundwaters sustain diverse surface ecosystems and are populated by metazoan species, mostly invertebrates, that provide fundamental ecological functions and are often of prominent conservation value due to narrow endemism and high phylogenetic rarity.
Francesco Cerasoli +7 more
wiley +1 more source
脱氮效率不高一直是困扰人工湿地应用的问题之一,如何强化人工湿地脱氮已成为近年来的研究热点。人工湿地对于氮的去除作用主要有氮的挥发、水生植物的吸收、基质的吸附、沉淀以及微生物的硝化与反硝化作用,也发现了一些新的脱氮途径,如短程硝化反硝化、同步硝化反硝化等。从湿地结构改进、运行方式优化、建立湿地组合系统、基质优选、植物筛选、微生物调控等方面详细论述了人工湿地强化脱氮措施及净化效果,以期为人工湿地技术优化与工程应用提供参考。
陶敏, 贺锋, 王敏, 吴振斌
doaj

