a他发现学习化学很有趣 He discovered study chemistry is very interesting[translate] achinese students are doing far better than american students in their studies 中国学生在他们的研究中做着更好比美国学生[translate] achinese students strong belief in hard work 中国学生坚定的信心在坚苦工作[translate] ...
Reported key examples of successful applications of ionic liquids are critically reviewed,, bearing in mind their physicochemical meaning. Information on retention mechanisms is also briefly analyzed. Ionic liquids demonstrate advantages and potential in chromatographic field....
The derivatization reaction was found to be selective, fast, quantitative, and allows good sensitivity when monitored at 368 nm detection wavelength (absolute limit of quantitation is placed around 0.1 µg/mL, meaning 0.01% with respect to the amount of loratadine used in the test ...
Carry-over between samples, meaning the appearance of an analyte in a sample from a preceding sample, can occur in analytical methods. Since it may have an impact on the accuracy and precision of the study sample concentrations, the potential of carry-over was thus investigated in the present...
and recovery experiment as illustrated in Fig.3. This differential washout or elution of compounds is the basis for the HPLC separation10. Although HPLC is simple to set up and operate, the operator must have a thorough understanding of the system, its columns, and the chemistry of the compou...
As far as coatings are concerned, SilcoTek’s coatings are unique in the way that they are applied. Many coating technologies such as diamond-like carbon, ceramics, epoxies, or polymer applications are applied via line of sight techniques, meaning only the part that is facing the source of ...
probability values of most responses except rhein were less than 0.05, indicating most responses were significant; the “lack of fit” values for six responses were not significant, indicating the fitness of these models was good; adequate precision of responses were greater than 4, meaning these ...
The transformation of KET 1 to KET 2 and later to KET 5 was observed after 1 min exposure, meaning after the degradation of KET 1. The formation of two other TPs (KET 3 and 4) was observed as well. As long as the amount of KET 3 increased slowly along irradiation time until 1 ...
The term “HPLC” has herein its art understood meaning and refers to a particular type of liquid chromatography that characteristically operates under high-pressure conditions. In a liquid chromatography system, the molecules of “analytes” (i.e., compounds or agents under investigation) interact ...
However, all of them were more abundant in wines than in musts, meaning that they were formed in the course of fermentation. This was confirmed by the attribution of major signals to tryptophol, formed from tryptophan by yeast metabolism, and to coumarins and caffeic acid derivatives (e.g.,...