Redirigiendo al acceso original de articulo en 24 segundos...
Inicio  /  Applied Sciences  /  Vol: 12 Par: 18 (2022)  /  Artículo
ARTÍCULO
TITULO

Assessment of Antioxidant and Scavenging Activities of Various Yogurts Using Different Sample Preparation Procedures

Eugenia Papadaki and Ioannis G. Roussis    

Resumen

Antioxidant activities of various yogurts were assessed using different sample preparation procedures. Specifically, full-fat cow, goat and ewe yogurts as well as cow yogurts with different fat content (4%, 2% and 0%) were employed. Antioxidant activities were determined in two different water-soluble yogurt extracts and also in a total yogurt preparation using the ?Clarifying Reagent? for dairy products. Full-fat ewe yogurt preparations exhibited higher antioxidant activities in FRAP and Folin assays as well as higher scavenging capacities against DPPH, hydroxyl and superoxide anion radicals than full-fat cow and goat yogurt preparations. Bradford, Lowry and Ellman?s assays confirmed that the strong antioxidant potential of the ewe yogurt was associated with its high protein content. In addition, antioxidant activities appeared to be related with the fat content of cow yogurt. Particularly, in DPPH, FRAP and Folin assays, and also in assays for scavenging of DPPH, hydroxyl and superoxide anion radicals, it was demonstrated that the fat removal led to the increase of the antioxidant/scavenging activities of the cow yogurts due to the increase of their protein/peptide water-soluble content. Moreover, for the first time, results show that the ?Clarifying Reagent? for dairy products can be used for the determination of antioxidant and radical scavenging activities of whole yogurt using the FRAP assay as well as the hydroxyl and superoxide anion radicals scavenging assays.

Palabras claves

 Artículos similares

       
 
Teresa Leszczynska, Barbara Pieklo, Aneta Kopec and Benno F. Zimmermann    
This study compares the content of basic nutrients (proteins, fats, digestible carbohydrates, dietary fiber and ash), steviol glycosides, selected antioxidants (vitamin C, total polyphenols) and antioxidant activity in dried leaves of Stevia rebaudiana B... ver más
Revista: Applied Sciences

 
Najah M. Al-Baqami and Reham Z. Hamza    
Cadmium (Cd) is widely used in some industries and emitted from fossil fuels. It is a heavy metal with a number of side effects, including hepatotoxicity. Resveratrol (Rs) is considered an important polyphenol, which is a secondary plant metabolite and h... ver más
Revista: Coatings

 
Nesrine H. Youssef, Sameer H. Qari, Said I. Behiry, Eldessoky S. Dessoky, Ehab I. El-Hallous, Moustafa M. Elshaer, Ahmed Kordy, Viviana Maresca, Ahmed Abdelkhalek and Ahmed A. Heflish    
Alternaria species, mainly air-borne fungi, affect potato plants, causing black spots symptoms. Morphological identification, pathogenicity assessment, and internal transcribed spacer (ITS) molecular identification confirmed that all isolates were Altern... ver más
Revista: Applied Sciences

 
Pierluigi Carbonara, Walter Zupa, Isabella Bitetto, Sébastien Alfonso, Mariano Dara and Matteo Cammarata    
Three groups of European sea bass (Dicentrarchus labrax) were fed for seven months, with either a conventional diet or two different organic diets, which contain organic vegetables and a natural antioxidant compound. The two organic diets differed themse... ver más

 
Kulwa Mtaki, Margareth S. Kyewalyanga and Matern S. P. Mtolera    
The current study assessed antioxidants contents (total phenolics and total flavanoids, ß-carotene and lycopene) present in Chlorella vulgaris (C. vulgaris) cultivated in low cost media and their free radical scavenging activities. Microalgae was culture... ver más
Revista: Applied Sciences