The radioprotective ability of L-tryptophan, tryptamine, 3-indoleacetic and indole (10~4 m), on UV and gamma irradiated DNA (10-4 m) is studied. UV radioprotection is accomplished in the following order of efficiency: L-Tryptophan and 3-indoleacetic acid > indole and tryptamine. The corresponding DRF measured as absorbancy loss at 260 nm, were: L-Tryptophan and 3-indoleacetic acid around 3 and ...

Background: Tea is a refreshing drink that contains polyphenol compounds, namely catechins are used for medicine and cosmetics. This study was to assess the content of catechin compounds in green tea, oolong black tea products from Indonesia, China Taiwan. Methods: Some brewed at varying temperatures (75±2; 85±2 95±20 C) times (5; 10 15 minutes). Identification carried out using chemical reagen...

UV-VIS spectrophotometry is one of the methods used toperform qualitative and quantitative analysis organic andinorganic compounds. However, until now there has been nofurther research that studies describes detailedanalysis spectral data in terms determining thestructure chemical Therefore, this papercontains guidelines are as information on how toread interpret from spectrum termsof structure...

Determination of Total Levels White Turmeric Flavonoids (Curcuma zedoria Rosc.) with Variation Solvent Types. turmeric is a herbal plant that has many health benefits in healing several diseases. It can grow wild the open moist soil. The purpose this study was to determine total levels white flavonoids various types solvents. solvents used were water and ethanol. quantitative test extract querc...

Clinical laboratory wastewaters are of important environmental concern due to the highly complex chemical reagents and dyes used identify various pathologies, which difficult degrade by conventional treatment methods. The present research aimed assess effects ilmenite use in discoloration process clinical wastewater. wastewater originates from a Gram staining pathogenic microorganisms biologica...

Abstract Fluorine substituent effects associated with the and (n=0, 2, 4, TCNQ=7,7,8,8‐tetracyanoquinodimethane) half‐cell reactions provide access to a wide driving force range (∼850 mV) which is available tune redox reactions; in this case oxidation of by or . The ‐ / chemistry was studied steady‐state transient cyclic voltammetry UV‐visible spectrophotometry acetonitrile containing 5 % water...