Determination of fatty acid composition of -irradiated hazelnuts; walnuts; almonds; and pistachios
Hazelnut; walnut; almonds and pistachio nuts were treated with 1; 3; 5; and 7 kGy of gamma irradiation. Oil content; free fatty acid; peroxide value and fatty acid composition of the nuts were investigated immediately after irradiation. The data obtained from the experiments indicated that gamma irradiation did not cause any significant change in the […]
Identification of the 100 richest dietary sources of polyphenols: an application of the Phenol-Explorer database
BACKGROUND/OBJECTIVES: The diversity of the chemical structures of dietary polyphenols makes it difficult to estimate their total content in foods; and also to understand the role of polyphenols in health and the prevention of diseases. Global redox colorimetric assays have commonly been used to estimate the total polyphenol content in foods. However; these assays lack […]
Effects of different forms of hazelnuts on blood lipids and a-tocopherol concentrations in mildly hypercholesterolemic individuals.
Background/Objectives: Diets high in nuts reduce cholesterol; probably due to their favorable lipid profile and other bioactive substances. However; the physical form of the nut may be important as the cell wall of intact nuts may limit the hypocholesterolemic effect of nuts by reducing lipid bioavailability. Therefore; we investigated the effects on blood lipids of […]
Effects of roasting on taste-active compounds of Turkish hazelnut varieties (Corylus avellana L.)
The effect of roasting on taste-active components of 18 native hazelnut varieties; grown in the Giresun province of Turkey; was assessed. Samples were examined for their sugars; organic acids; condensed tannins; and free phenolic acids. Six sugars (fructose; glucose; sucrose; myo-inositol; raffinose; and stachyose); seven organic acids (oxalic; maleic; citric; malic; lactic; succinic; and acetic); […]
The effects of hazelnut oil usage on live weight; carcass; rumen; some blood parameters and femur head ash in Akkaraman lambs
This study was carried out to determine the effects of hazelnut oil supplementation in the diets on growth; carcass and blood parameters as well as rumen pH; protozoa quantity and femur head ash in Akkaraman lambs. Forty native Akkaraman lambs were used. The lambs were divided into two groups as treatment and control. The treatment […]
Effects of roasting on oil and fatty acid composition of Turkish hazelnut varieties (Corylus avellana L.)
A total of 18 natural and roasted hazelnut varieties (namely; Aci; Cavcava; Cakildak; Fosa; Ham; Incekara; Kalinkara; Kan; Karafindik; Kargalak; Kus; Mincane; Palaz; Sivri; Tombul; Uzunmusa; Yassi Badem; and Yuvarlak Badem); grown in the Giresun province of Turkey; were compared for their differences in oil content and fatty acid profiles. The oil content in natural […]
Hazelnut consumption decreases the susceptibility of LDL to oxidation; plasma oxidized LDL level and increases the ratio of large/small LDL in normolipidemic healthy subjects
OBJECTIVE: Nut consumption has beneficial effects on protection for development of atherosclerotic process. METHODS: Single intervention study design was used to determine the effects of hazelnut-enriched diet (1 g/kg/day) during 4 weeks period on atherogenic tendency of low-density lipoprotein (LDL) by evaluating susceptibility of LDL to oxidation; alpha-tocopherol content of LDL; LDL subfractions; plasma oxidized […]
Detection of hazelnuts and almonds using commercial ELISA test kits
Three commercial sandwich enzyme-linked immunosorbent assay (ELISA) test kits for the detection of hazelnuts and almonds were evaluated. Limits of detection and dynamic ranges were determined for hazelnuts and almonds spiked into cooked oatmeal; dipping chocolate; and muffins (baked). The limit of detection values varied from 1 to 38 mug/g; depending on the food matrix […]
Analysis of genes early expressed during Aspergillus flavus colonisation of hazelnut
Aflatoxins contamination by Aspergillus flavus is a matter of great concern for oil rich crops among which hazelnuts represent economically important agricultural commodities of Mediterranean countries; mainly used as mixed nuts or as ingredients in the bakery and confectionery industries. Since the biosynthetic pathway of aflatoxin biosynthesis has been elucidated in detail; expression analysis of […]
Cardioprotective roles of aged garlic extract; grape seed proanthocyanidin; and hazelnut on doxorubicin-induced cardiotoxicity
Doxorubicin (DXR) is a chemotherapeutic agent used effectively in the treatment of several childhood malignancies. During treatment; cardiotoxicity caused by cell damage due to the free oxygen radicals that are generated is a major limiting factor. This study was undertaken to determine whether DXR-induced cardiotoxicity could be prevented by natural foods with antioxidant properties such […]