Evaluation of the microelement profile of Turkish hazelnut (Corylus avellanaL.) varieties for human nutrition and health

Abstract

In this study, the levels of boron (B), cobalt (Co), copper (Cu), chromium (Cr), iron (Fe), lithium (Li), nickel (Ni), selenium (Se) and zinc (Zn) microelements in 16 hazelnut samples were determined by inductively coupled plasma mass spectrometry and atomic absorption spectroscopy after microwave digestion, and are discussed for human nutrition and health. Significant differences were observed between the microelement contents of the 16 varieties (P < 0.01). The average microelements concentrations in the varieties varied in the following ranges: B, 13.63-23.87; Co, 0.47-0.82; Cr, 0.22-0.52; Cu, 16.23-32.23; Fe, 31.60-51.60; Li, 0.035-0.042; Ni, 0.58-2.58; Se, 0.96-1.39; and Zn, 22.03-44.03 mg/kg. These results showed that hazelnuts can be an important microelement source for human nutrition and health. According to our trace element data, a daily consumption of 50 g hazelnut can supply easily about 6% for B, 9% for Co, 19% for Fe, 9% for Ni and 16% for Zn of the recommended daily allowance. On the other hand, Se, Cu and Cr levels of 50 g hazelnuts are higher than the respective daily requirements, but slight overdoses of these elements are non-toxic for human health.

The effect of silicon and boron foliar application on the quality and shelf life of cherry tomatoes

“…The Si and B contents as applied to the plants were measured according to Simsek and Aykut (2007) with the help of inductively coupled plasma (ICP) -atomic emission spectroscopy (AES) Integra XL Dual (GBC Scientific Equipment Pty Ltd., Australia) succeeding astringent assimilation, and the result was recorded like a concentration (mg kg -1 dry weight). Scanning electron microscopy (SEM).…”

Scientific data on selenium status in Turkey

“…The highest Se levels were observed in hulled Tombul hazelnuts from Ferizli, and the lowest Se levels were observed in unhulled Kara Fındık and Tombul hazelnuts from Karasu. Another study by Simsek and Aykut [27] examined Se content in 16 hazelnut varieties collected in 2002 by the Hazelnut Research Institute from the provinces of Ordu and Giresun in the Black Sea Region. Reported Se levels (0.96 -1.39 μg/g) were significantly lower than those reported by Dundar and Altuntag [26].…”

The Mineral Source for Human Nutrition of Nuts in Different Hazelnut (Corylus avellana L.) Cultivars

“…Fruits and vegetables are therefore getting broader attention in a strategy to increase the nutritional value of meals while reducing energy density and intake (Demigné et al, 2004). Hazelnuts (Corylus avellana L.) have a significant place among the types of dried nuts in terms of nutrition and health owing to their special composition of fats, protein, carbohydrates, vitamins, minerals, dietary fibers and phenolic antioxidants (Demirbas, 2007;Simsek and Aykut, 2007;Solar and Stampar, 2011). The nutritional and sensory properties of hazelnuts make them a unique and ideal raw material for food products.…”