bring about chemical changes, and some of theproducts of a modern refinery complex are chemicals by any definition. The termpetrochemicalis used to describe these chemical operations, but, because they are often carried out at the same plant as the primary distillation, the distinction between petr...
In the dynamic landscape of global supply chains, chemical companies are encountering both significant challenges and new opportunities. Geopolitical disruptions, climate disruptions, and regional changes in policies and regulations, in addition to shifts in supply and demand, have made supply chain resili...
aSuch thoroughgoing transformations, in which all the properties of a material are altered, so that a completed different materials is obtained, are called chemical transformations, chemical changes or chemical reactions. 这样彻底变革,材料所有物产被修改,因此完整不同的材料得到,叫化工变革、化学变化或者化...
this reaction, which is an example of acombustion reaction, changes occur in the way that the carbon, hydrogen, and oxygen atoms are bound together in the compounds. mercury (Hg)Mercury (chemical symbol: Hg) is the only metal element that is liquid at room temperature....
Gathered here are those chemical properties which are not covered under the general headings of phase equilibria and crystal structure. The chemical properties of a feldspar can be considered from many viewpoints: thus a crystal chemist emphasizes the ch
A catalyst changes the transition state to lower the activation energy. A biological catalyst is called enzyme. active compound (pharm .) Generic medicinal products contain the same active compounds as the original products. active ingredient (pharm. ) Acronym: AI A drug is normally not ...
2. of or made from or using substances produced by or used in reactions involving atomic or molecular changes; "chemicalfertilizer" 同义词辨析 drug, medicine, medication, remedy, cure, chemical 这些名词都有"药"之意。 drug: 普通用词,含义广泛,可指任何用于预防或治疗肉体上或精神上疾病的药品。用...
Ambitions towards a circular economy are increasingly vocalised across academia, policymaking and industry. The endeavour of realising these ambitions prov
a. of or made from or using substances produced by or used in reactions involving atomic or molecular changes chemical的用法和例句: 1.It's essentially thechemicalused to separate otherchemicals from each other. 甲醇主要被用于 分离其它化学物 ...
(24-hour period for particles <10 μm); 35 μg/m3(24-hour period for particles <2.5 μm)contributes to formation of haze as well as acid rain, which changes the pH balance of waterways and damages foliage, buildings, and monumentsirritation of breathing passages, aggravation of asthma, ...