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155.652  Articles
1 of 15.566 pages  |  10  records  |  more records»
A theoretical study on the thymoquinone compound has been performed through two theoretical methods, DFT/B3LYP and HF with 6-31G, 6-31G(d, p) and 6-31++G(d, p) basis sets using Gaussian 09 program. Some theoretical properties, like vibrational and electro... see more

Arabica coffee is being considered to be of better quality than robusta because of their superior taste and aroma. Adulteration of arabica with other cheaper coffee like robusta coffee has become a great problem related to authentication of food products.... see more

UV-Vis spectroscopy has been used as a promising method for coffee quality evaluation including in authentication of several high-economic coffee types. In this paper, we have compared the abilities of linear discriminant analysis (LDA) and support vector... see more

Spectroscopic method in the UV-Vis region is considered the most molecular spectrometric method for content determination of a single component. However, a lot of pharmaceutical dosage forms comprise two or more components which lead to peak overlapping. ... see more

Sauce is a flavoring and flavor enhancer that is thick and red in color. The sauce is suspected to contain Rhodamine-B as coloring agent because a bright red color fluorescence. This study aims to analyze qualitatively and quantitatively Rhodamin-B in the... see more

Cosmetics are preparations that are applied to the external surface of the body for the purpose of cleaning, perfuming, changing the appearance or keeping the body in good condition. Currently, people are very interested in using facial whitening cream co... see more

Saffron is considered as the most expensive spice in the world. Due to low production, high demand and high cost, saffron is very prone to adulteration for economic benefits while putting public health at risk. The most significant characteristic for dete... see more

Coffee (Coffea sp) is the second-largest beverage consumed by people around the world whose process comes from the processing and extraction of coffee beans. Coffee has a chemical compound, one of which is caffeine. Caffeine is a crystal-shaped compound. ... see more

This study aims to obtain the profile of Thin-Layer Chromatography (TLC) and Ultraviolet-Visible (UV-Vis) spectrophotometry from the ethanol extract of akar kuning stems (Arcangelisia flava) from Central Kalimantan. The TLC method is used with the orienta... see more

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