"

Cookies ussage consent

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

I agree, do not show this message again.

Spectroscopic characterization of some grape extracts with potential role in tumor growth inhibition

I. D. POSTESCU1,* , C. TATOMIR1, G. CHERECHES1, I. BRIE1, G. DAMIAN2, D. PETRISOR2, A-M. HOSU3, V. MICLAUS3, A. POP4

Affiliation

  1. Institut of Oncology “Prof. dr. Ion Chiricuta”, Cluj Napoca, Romania
  2. “Babeş-Bolyai” University, Department of Physics, Cluj-Napoca, Romania
  3. “Babes-Bolyai” University, Department of Chemistry, Cluj Napoca, Romania
  4. University of Agricultural Sciences and Veterinary Medicine, Cluj Napoca, Romania

Abstract

Some varieties of grapes, namely, Burgund Mare (BMR), Cabernet-Sauvignon (CSR), Muscat-Hamburg (MHR), Merlot (MR), Merlot Dealu-Mare (MDM) from a wine production area in Romania, Recas, were investigated in order to find optimal efficiency of certain extraction procedures for satisfactory polyphenolic composition and to evaluate their antioxidant activities. Total polyphenols content of studied extracts, was determined according to Folin-Ciocalteu methodology. The antioxidant capacity (reducing power) was performed by ESR spectroscopy and spectrophotometry with DPPH as radical scavenger. The antioxidant activity was found following order: seeds>skins>clusters; that might be explained by a corresponding decrease of activity with decrease of total phenolic contents..

Keywords

Grapes, Antioxidants, Spectrophotometry, ESR spectroscopy, DPPH, Tempol.

Submitted at: Nov. 15, 2006
Accepted at: March 15, 2007

Citation

I. D. POSTESCU, C. TATOMIR, G. CHERECHES, I. BRIE, G. DAMIAN, D. PETRISOR, A-M. HOSU, V. MICLAUS, A. POP, Spectroscopic characterization of some grape extracts with potential role in tumor growth inhibition, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 3, pp. 564-567 (2007)