Before we can assign a structural formula to a compound, we must first know its molecular formula.
在确定一个化合物的结构式之前，首先应知道它的分子式。
The calculation of molecular formula of compounds was described by13C NMR (com, DEPT) data in this paper. It is a useful method for unknown compounds.
介绍了用13cNMR (COM,DEPT)数据计算化合物的分子式，该方法有利于未知化合物的分子式计算。
The average condensed formula of molecular structure is effective to derive the composition of the peripheral substituents of porphyrins, especially geoporphyrins with identical carbon numbers.
卟啉的平均分子结构简式衡量其取代基的组成，尤其对地质体中相同碳数的卟啉“ 混合物” 大环外取代基的构成十分有效。
On the basis of production practice, the reaction mechanism of highly efficient aliphatic water reducer was analyzed in-depth, its molecular formula was put forward.
在生产实践的基础上对脂肪族高效减水剂的合成反应机理进行了深入的分析，提出了脂肪族减水剂的分子示意式。
The aim of the paper is to provide helpful Suggestions for the formula design and development of microspheres loaded with small molecular and water soluble drugs.
探讨微球制剂的载药、释药机制，为处方设计和水溶性小分子药物微球制剂的开发提供指导。
Based on the valence bond theory, a general molecular formula for organic com - pounds is derived.
本文根据价键理论导出了一个有机化合物的分子总通式。
The molecular formula, C6H14, does not show anything except the total number of carbon and hydrogen atoms.
分子式C6H14只用来表示碳原子和氢原子的总数。
Facing thees numerous and complicated molecular formula, he doesn't know what to do, because he is a layman to them. His major is art.
面对着这些纷繁的分子式，他不知如何是好，因为他对它们一窍不通，他是学艺术的。
With high technology content is made from the root of herbaceous peony extract technology products, extracted C23H28O11, molecular formula: 480.45.
芍药苷是用高新技术精制提取技术从白芍中提取出来的产品，分子式：C23H28O11、分子量480.45。
Through molecular structure design and material selection formula and the development process of orthogonal test of a new generation of KH high efficiency foaming agent.
通过分子结构设计和材料优选配方与工艺正交试验研制的新一代KH高效发泡剂。
Wedge perspective formula is one of methods to expresses organic molecular formula 's stereoscopic construction, the means to write it in Chemistry textbook isn't very dearly.
楔形式是有机分子立体结构表示方法之一，有机化学教科书中的书写方法不够清楚。
Thee molecular formula, C6H14, does not show anything except the total number of carbon and hydrogen atoms.
分子式c 6h14只用来表示碳原子和氢原子的总数。
Gives a formula for calculation of crude oil molecular weight and compares the results calculated from crude oil samples.
给出了一个原油分子量计算公式，并对原油样品的计算结果进行了比较。
It is calculated in practice by summing the atomic weights of the atoms making up the substance's molecular formula.
实际计算中是把组成该物质分子式的各原子的原子量求和而得。
According to the principle of isomeric chemistry, when organic substances have the same molecular formula and the same functional groups, their chemical and physical properties are very similar.
根据同分异构的化学原理，有机物有相同的分子式和相同的官能团时，它们的化学性质和物理性质很相似。
At last confirming the pigment was delphinidin-3-O-glucoside, the molecular formula is C21H21O12.
最后确定样品可能是飞燕草色素-3-葡糖苷，分子式为C21H21O12。
Ammonium di-iso-butyl dithiophosphate and ammonium din-butyl dithiophosphate is isobutyl isomers, they have the same molecular formula, only alkyl isomers.
异丁基铵黑药和正丁基铵黑药是同分异构体，它们有相同的分子式，只烷基异构。
The result shows that the measurement results agree well with standard values by choosing simulative average molecular formula on balance.
结果表明，采用模拟的平均分子式作为平衡项处理，测定结果与给出的标准值吻合。
This paper estimates the carbon content of different trees by the plant molecular formula, and estimated the forest carbon sequestration in our country using the carbon content as parameter.
本文通过植物分子式的方法确定不同树种的含碳量，以此为参数对我国的森林碳汇量进行了估算。
Menthol is a chemical agent, menthol by the mint leaves and stems in the extract, white crystals, molecular formula C10H20O, mint, and peppermint oil to the main ingredient.
薄荷脑是一种化学药剂，薄荷脑系由薄荷的叶和茎中所提取，白色晶体，分子式c 10h20o，为薄荷和欧薄荷精油中的主要成分。
To provide the molecular formula and molecular weight, as the substance has a unique and defined molecular structure according to item III of your notification form.
根据申报表项填写情况，申报物质有唯一确定的分子结构，所以应准确填写申报物质的分子式和分子量。
The invention provides a perfluorinated ion exchange resin and a preparation method and application thereof. The molecular formula of the perfluorinated ion exchange resin is shown as the formula m.
本发明提供了一种全氟离子交换树脂，该全氟离子交换树脂的分子式如式m所示。
The invention discloses coal water slurry additive of polyacrylic acid series. The general molecular formula is shown in the right formula.
本发明公开了聚丙烯酸系列水煤浆添加剂，其结构通式如右式。
The purified compound showed a molecular formula of C28H44O3, displaying characteristic features of epidioxy sterols and was reverted to ergosterol when submitted to S. schenckii enzymatic extract.
纯化化合物展示了分子式C28H44O3，显示过氧甾醇的特征和复归麦角提交给美国时，申克酶提取。
Norvasc Amlodipine Besylate Molecular formula: C26H31ClN2O8S Properties: white or light yellow crystalline powder, odorless, bitter taste, soluble in water, methanol.
络活喜AmlodipineBesylate 分子式：C26H31ClN2O8S性质：白色或淡黄色结晶性粉未，无臭、味苦，易溶于水、甲醇。
Its Molecular Formula for ozone, oxygen is the same allotrope, with its own unique character, in natural conditions, the ozone is slightly special light blue fresh smell of gas.
其分子式为O3，是氧气的同素异形体，具有它自身的独特性质，在自然条件下，臭氧是略带有特殊新鲜气味的淡蓝色气体。
Their general molecular formula were characterized with elemental analysis, ir, UV, XRD, TEM, TG-DTA and TPR techniques.
通过元素分析、IR、UV、XRD、TEM、TG DTA、TPR等测试手段对其组成、结构、颗粒大小、热稳定性以及表面性能进行了表征。
Their general molecular formula were characterized with elemental analysis, ir, UV, XRD, TEM, TG-DTA and TPR techniques.
通过元素分析、IR、UV、XRD、TEM、TG DTA、TPR等测试手段对其组成、结构、颗粒大小、热稳定性以及表面性能进行了表征。
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