Now showing items 1-10 of 134
Rapid and direct volatile compound profiling of black and green teas (Camellia sinensis) from different countries with PTR-ToF-MS
(Elsevier Science, 2016-05)
Volatile profiles of 63 black and 38 green teas from different countries were analysed with Proton Transfer Reaction-Time of Flight-Mass Spectrometry (PTR-ToF-MS) both for tea leaves and tea infusion. The headspace volatile ...
Antioxidant activity and phenolic composition of herbal infusions consumed in Brazil
Processed tea and herbal infusions were Studied for their phenol content, antioxidant activity and main flavonoids. Total phenolics were determined by Folin-Ciocalteu method and ranged from N.D. to 46.46 +/- 0.44 mg/g GAE. ...
Increasing the antioxidant power of tea extracts by biotransformation of polyphenols
(Elsevier Sci LtdOxfordInglaterra, 2011)
Absolute determination of soluble potassium in tea infusion by gamma-ray spectroscopy
(ELSEVIER SCI LTD, 2009)
Potassium content in tea brew was determined by gamma-ray spectroscopy, Using the 1461 keV gamma-ray fro M (40)K, the naturally occurring radioactive isotope of potassium. We measured radiation with a shielded HPGe detector ...
Protective effect of boldo and tea infusions on the visible light-mediated pro-oxidant effects of vitamin B2, riboflavin
The effect of Boldo and black tea infusions on the pro-oxidant effects of vitamin B-2, riboflavin (R-F), when exposed to the action of visible light was studied. The amounts of antioxidants present in Boldo and tea infusions ...
The phenolic compounds and the antioxidant potential of infusion of herbs from the Brazilian Amazonian region
(Elsevier Science BvAmsterdamHolanda, 2013)
Evaluation Of Direct Analysis For Trace Elements In Tea And Herbal Beverages By Icp-ms
(SOC BRASILEIRA QUIMICASAO PAULO, 2015)
Determination of catechins in green tea infusions by reduced flow micellar electrokinetic chromatography
(ELSEVIER SCI LTD, 2011)
A sulfated-beta-cyclodextrin (s-beta-CD) modified reduced flow micellar electrokinetic chromatography (RF-MEKC) method was developed and validated for the determination of catechins in green tea. The optimal electrolyte ...