The validity of the chromane helicity rule correlating the sense of twist within the dihydropyran ring with the CD sign of the (1)Lb band observed at ca. 290 nm in their electronic circular dichroism (ECD) spectra is examined using a set of natural (S)-trolox derivatives. To investigate both the scope and the limitations of the rule a combination of ECD spectroscopy, especially the temperature ...

Introduction Nutritional content in citrus fruit is enormous. Citrus grandis (L.) Osbeck underutilised crop that receives little attention due to the lack of knowledge regarding its nutritional value. waste disposal poses a problem economic and environmental factors. Methods The metabolites flavonoids, phenols antioxidant capacity dropped fruits species pomelo ( Osbeck) were examined. Results d...

Purpose: To evaluate the potential of active compounds derived from moss in the prevention and treatment of various diseases. Methods: Three species of moss were extracted with deionized water at 95 °C, and with 70.5 % ethanol at 85 °C. Analysis of total phenolic contents (TPC) of the extracts were performed by FolinCiocalteu (FC) method. The antioxidant activity of the extracts were determined...

conclusions according to the obtained data, synthesized pyridine based chalcones (3a-3j) could be proposed as potential antioxidant lead compounds. background natural chalcones and also their synthetic derivatives have attracted increasing attention due to various pharmacological applications. development and discovery of new chalcones with antioxidant activities is one of the attracting areas ...

Black carrot, which is an economically important product, produced extensively in Konya and Hatay regions Turkey. Kombucha tea a symbiotic system, comprises of bacteria yeasts cultures called as SCOBY, by fermentation sugar leaves. samples contained black carrot juice two concentrations (10 20%) compared with the green varieties were used for enrichment production investigated terms physico-che...

In the present work, an automatic flow procedure for the sequential spectrophotometric determination of Folin-Ciocalteu reducing capacity (FC assay) and 2,2'-azinobis(3-ethylbenzothiazoline-6-sulfonic acid) radical cation (ABTS*+) scavenging capacity expressed as the trolox equivalent (TEAC assay) is proposed for a comparative study of antioxidant properties in food products. Exploiting the fle...

Medicinal plants represent an essential source of active biological compounds. The current study examined the methanol extract V. iphionoides for its antibacterial, antioxidant, and antiinflammatory activities. antibacterial activity was evaluated against six bacterial strains (Staphylococcus xyloses, Escherichia coli, Klebsiella oxytoca, Enterobacter aerogenes, Achromabacter xylosoxidans, Pseu...