This structure has two helical chains each coiled round the same axis (see diagram). We have made the usual chemical assumptions, namely, that each chain consists of phosphate di-ester groups ...

State Key Laboratory of Chemical Resource Engineering, Beijing Engineering Center for Hierarchical Catalysts, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, China ...

While the presence and significance of melanin have long been accepted, its exact chemical makeup remains unclear. Melanin has an inherent diversity of structure and complexity, making understanding ...

Structure-based drug design is the design and optimization of a chemical structure with the goal of identifying a compound suitable for clinical testing — a drug candidate. It is based on ...

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ABSTRACT: The use of evaluative that clauses is a key linguistic feature in academic writing, reflecting authors’ stance and epistemic positioning. While prior studies have examined disciplinary ...

PHILADELPHIA (WPVI) -- A new chemical is molding a new narcotic nightmare in Philadelphia. BTMPS is shorthand for an industrial substance that's added to plastics, and it's being found in the ...

A new Formula 1 season is underway. Lando Norris made the perfect start to his title challenge in Australia as he looks to dethrone reigning champion Max Verstappen. The first sprint weekend of ...

本研究针对职业性哮喘的主要诱因——呼吸道致敏原(RSs)缺乏OECD认可测试指南的现状，荷兰国家公共卫生与环境研究所团队通过气液界面(ALI)模型，首次系统比较了piperazine、chloramine-T和TDI三种致敏原对人支气管上皮细胞Calu-3的影响。研究发现piperazine通过剂量依赖 ...