What is a diastereomer in organic chemistry?StereoisomersStereoisomers are compounds having the same molecular formula but differ in the arrangement of atoms in the tridimensional space. Stereoisomers can be categorized into two: configurational and conformational isomers. Configurational isomers are inter...
Chemical formula: A chemical formula is an abbreviation of the number of atoms in a single compound, or molecule. Molecule: A molecule is a substance made of two or more atoms that are bonded together. There are two main types of bonds that occur in molecules, covalent and ionic. ...
根据 He lets the ice cream warm up to about 12"FHarrison explains,“You get more flavor from wamer ice cream, which is why some kids like to stx it, greating ice cream soup.(他让起洪淋加热到12华氏度。哈里森解释说:“温暖的冰洪淋味道更好,这 就是为什么有些孩了喜欢搅拌它,做冰...
On the opposite end isdeepflow, which is what most people associate with flow.Deepflowstates are subjectively more intense and are elicited from activities that are longer in duration and relatively more complex, requiring a high degree of skill. For example, cruising a boat across the ocean (Ma...
根据第三段第一句 “As a matter of fact, the main reason why many people do not excel in mathematics is the widespread worry and unease.(事实上,许多人数学不擅长的主要原因是普遍存在的担忧和 不安。 )”可知,人们不擅长数学的主要因素是与这个学科相关的担忧和焦虑。故选B。 【13题详解】 词句猜测...
APPTEST is a novel protocol for the automatic prediction of peptide tertiary structures. Brief Bioinform. 2021;22(6). doi: 10.1093/bib/bbab308 (Open in a new window)Web of Science ®(Open in a new window)Google Scholar Alam N, Goldstein O, Xia B, et al. High-resolution global ...
They start to organize into secondary structures by the formation of intramolecular hydrogen bonds at the pentamer level. Microscopy and diffraction of the oligomers indicated a crystalline character for only the shorter ones.WileyChemistry - A European Journal...
This interlinking of many units has given the polymer its name, poly meaning 'many' and mer meaning 'part'( in Greek). As an example, a gaseous compound called butadiene, with a molecular weight of 54, combines nearly 4000 times and gives a polymer known as polybutadiene (a synthetic rub...
In chemistry, an enantiomers from Greek (enantios) meaning opposite and (meros) meaning part, are also named optical isomer, antipode, or optical antipode. Isomers are different compounds with the same molecular formula but that are structurally different in some way. It is important to be ...
However, the Chinese nomenclature had also a great impact on the development of Japanese terms in chemistry. So the influence of the Chinese terms is no doubt a point to be discussed when considering chemical terms in Japanese. The term huaxue (chemistry), for example, was coined in the ...