The concept ofelectronegativityintroduced in the 1930s by Linus Pauling, a great American chemist, refers to the ability of an atom to attract el...
阅读全文Could there be a way to chemically manipulate small, confined areas on cellular surfaces? Scientists have developed a microfluidic probe to send ...
阅读全文A research group at KAIST has engineered a bacterium capable of producing a natural red colorant, carminic acid, which is widely used for food ...
阅读全文For centuries, people in Baltic nations have used ancient amber for medicinal purposes. Even today, infants are given amber necklaces that they c...
阅读全文As the world awaits the upcoming Olympic games, a new method for detecting doping compounds in urine samples could level the playing field for ...
阅读全文Gasoline, the primary transportation fuel, contains hydrocarbons with 5-11 carbons (C5-11) and is almost derived from petroleum at present.
阅读全文In a September 2020 essay inNature Energy, three scientists posed several"grand challenges"—one of which was to find suitable materials for therma...
阅读全文Chemical reactions and physical processes that involve water surfaces will be easier to model thanks to the discovery by an all-RIKEN team of how the molecules at water surfaces lose energy.
阅读全文催化剂配体的合理设计是现代有机金属催化的主要发展方向之一。然而,由于催化反应常包含多个基元步骤,而配体的电子及位阻效应对不同基元步骤会产生不同的影响。这意味着柔性配体...
阅读全文醛的不对称炔丙基化可产生多种手性高炔丙醇产物,因此在有机合成中十分重要。为了实现不对称合成,常常将联烯基金属物种(如Si、B、Al、Cu、Sn、Cr、In等)用作炔丙基亲核试剂(图...
阅读全文在自然界中,二羟基苯丙氨酸(多巴)通常由非血红素含铁酶催化合成。近年来,含血红素的L-酪氨酸羟化酶(TyrH)作为一类新型的多巴生成酶被逐渐报道。该类酶在抗菌抗癌类天然产物...
阅读全文据最新一期《科学》杂志报道,奥地利格拉茨技术大学物理研究所联合法国南巴黎大学固体物理实验室,首次成功地对纳米表面声子进行了三维成像,有望促进新的更有效的纳米技术的发展。
阅读全文将羰基化合物转化为α,β-不饱和羰基化合物是一类重要的有机反应。传统的合成策略是先将羰基的α-位官能团化,然后利用消除反应得到目标双键。在各种羰基化合物中,...
阅读全文Specialized pro-resolving mediators (SPM) 是一类由多聚不饱和脂肪酸 (如鱼油成分DHA和EPA) 代谢产生的具有生物活性的小分子。根据分子结构可分为Resovlins、Protectin/Ne...
阅读全文Six genetic variants add up to determine the risk of several blood cancers in pre-disposed dog breeds, according to a study by Benoît H&ea...
阅读全文