物理化学

Objective: To evaluate the physicochemical characteristics of hair fibers among 41 youth of Chinese Han, and to provide a theoretical basis both for further cosmetic product and dermatological medication.

目的：分析41例汉族青年头发的物理化学特性，为毛发疾病的发病机制和治疗研究提供基础。

In the study, physical and chemical mutagenesis and protoplast fusion technique were used to select strains with low-yielding diacetyl, acetaldehyde, total higher alcohols and other excellent characteristics.

本研究采用物理化学诱变和原生质体融合的方法，选育具有低产双乙酰、乙醛和总高级醇等优良特性的啤酒酿造酵母菌株。

By bioactivity-guided isolation, 14 compounds were obtained from the active fractions. 13 of them were determined as 9,9'-dihydroxy-8,8'-dimethoxy- l,r-methyl-lH,lH'-[4,4']binaphtha

本研究利用稻瘟霉筛选体系对红葱的60％乙醇提取物及其氯仿、正丁醇和水的萃取部分进行了活性筛选，并对活性部位的活性化学成分进行了跟踪分离，从中分离得到十四个化合物，利用物理化学和光谱学的方法对其中十三个化合物的结构进行了鉴定，分别为9，9'-二羟基-8，8'-二甲氧基-1，1'-二甲基-1H，1H'-[4，4']双萘并

The method for the physicochemical phase analysis of a directionally solidified Ni-based cast superalloy was studied.

系统研究了一种定向凝固镍基铸造高温合金的物理化学相分析方法。

The physical and chemical properties of complex sodium disilicate as a new builder were studied.

研究了新型助剂复合二硅酸钠的物理化学性能。

The chemical stability of red beds is not good for the dissolvable chemical composition of red beds and evaporite.

蒸发岩和红层岩土体中可溶成份在水作用下，容易发生岩溶、腐蚀、渗流等物理化学问题。

For example ,the non－ polar materials like hydrocarbons are heavy and draggy as compared to polar emollients,isoparaffins are light and smooth,the polar esters were significantly lighter and smoother,the branched chain and unsaturated esters were exceptionally light and smooth,in the case of straight chain esters,as the emollients become smoother and lighter ,the oiliness increases,in the case of unsaturated and branched chain esters,the emollient becomes lighter ,as well as less oily,when the alcohol chain length is decreased.

研究结果表明，物理化学特性明显影响润肤剂的轻柔感和油亮感，例如类似碳氢化合物的非极性物质相对于极性物质要粘稠些，异构烷烃则轻柔和光滑，带分支链的不饱和酯特别具有轻柔感和光滑感，带分支的不饱和酯相对直链饱和酯在油亮感方面有着特别的不同，直链酯随着产品光滑感和轻柔感的增加，油亮感也增加，对于带分支的不饱和酯而言，产品变得更轻柔，油亮感下降。

It is also important to improve the physico-chemical and electrocatalytic properties of these porous carbon materials.

此外改善这些介孔材料的物理化学以及电催化性质也是很重要的。

In addition, based on a project case under water-inrush hazard, the field experiment has also been carried out; contrasted to other types of grout, such as cement with super fine slag, cement and water glass double grouts, and urea resin harnstoffharz, the applications and advantages of this chemical grout on inrush of high-pressure water controlling has further been proved.

以深部地下工程的加固和高压突水治理为研究对象，对一种新型化学注浆材料的化学反应封堵机制进行了可行性分析，并针对化学浆液的流动性、渗透性、抗冲刷性以及固结体的强度、水质毒理等因素进行了室内试验研究，详细地分析了浆液的物理化学特征，给出了浆液最佳配比值以及相应的性能指标。

The author analyses on how the physical and chemical elements spoil halogenate silver negatives and meanwhile lists out some of the technigues and methods for preserving.

摘 要：分析了物理化学因素损坏银盐底片的作用机理，提出了银盐底片保管的新途径。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷