Ahmet Ünver

Ahmet Ünver
Necmettin Erbakan Üniversitesi · Department of Food Engineering

Associate Professor Doctor

About

35
Publications
18,105
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1,101
Citations
Citations since 2017
2 Research Items
610 Citations
2017201820192020202120222023020406080100120
2017201820192020202120222023020406080100120
2017201820192020202120222023020406080100120
2017201820192020202120222023020406080100120

Publications

Publications (35)
Article
Full-text available
Erratum to: Erwerbs-Obstbau 2019 10.1007/s10341-019-00417-5 The original version of this article unfortunately contained a mistake. Mehmet Hakan Sonmete was not listed among the authors. The original article has been …
Article
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The influence of drying parameters on drying characteristics, colorimetric differences, antioxidant capacity and total phenols of sliced kiwifruit were researched. The kiwi fruits dried between 2.6 h and 12.1 h for different drying conditions. Total phenol content of dried fruits were ranged from 2.03–2.71 mg GAE/L. Free radical scavenging activity...
Article
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Nowadays, the concern of meat consumption, safety and quality has been popular due to some health risks such coronary heart disease, stroke and diabetes caused by the content as saturated fat, cholesterol content and carcinogenic compounds, for consumers. The importance of the need of new non-destructive and fast meat analyze methods are increasing...
Article
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Oil seeds are commonly used in cooking, frying and as salad oil and have commercial and economic importance. Since the seeds are roasted before pressing of the oil, changes occur in their composition; thus it is crucial to modify roasting process to minimise adverse effects. This study reflects the effects of different roasting temperatures (90, 15...
Article
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Einkorn (Triticum monococcum L.) is one of the ancient wheat varieties which is rich in various functional components. The present research evaluated peroxide, refractive index, fatty acids composition, total carotenoids, chlorophyll content and colour values of einkorn grain and its oil. Total phenolic content and 2,2-diphenyl-1-picrylhydrazyl rad...
Article
Full-text available
The crude oils obtained from the kernels of apple (Malus spp.), plum (Prunus domestica L.), apricot (Prunus armeniaca L.), sweet cherry (Prunus avium L.), mandarin (Citrus mitis), peach (Prunus persica L.), sour cherry (Prunus cerasus L.) and grape (Vitis vinifera L.) fruits were examined for some of their physicochemical properties and fatty acid...
Article
The antibacterial activity of the extracts of myrtle black and white leaves was determined. By the increase of the concentration of the extracts, antibacterial activity also increased. The most effective extract was the methanol extract of the leaves of the white myrtle against S. aureus. While, effect of ethyl acetate extracts of white and black m...
Article
This study was carried out on the monovarietal virgin olive oils from three olive varieties (Saurani, Halhali{dotless} and Karamani) growing in the Mediterranean region of Turkey. Saurani oil showed high oleic acid levels rising to 78% especially in both the harvest dates. At the same time, saturated fatty acids were found at lower concentrations i...
Article
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The essential oil for the present investigation was obtained from the air-dried leave +flowers of Salvia cryptantha as described in the experimental. Composition ofwater-distilled essential oils of S. cryptantha growing wild in Turkey were analysed by GC and GC-MS. At least 16 compounds were isolated and identified, corresponding to 98.5 % of the o...
Article
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Inhibitory effects of methanol-water (90:10; v/v) extract from sage (Salvia officinalis L.), laurel (Laurus nobilis L.) and thyme (Thymbra spicata L.) were tested in vitro on clinical isolates of eleven species of yeasts (C. krusei, C. clus, Rhodotorula rubra, C. albicans 10039, C. tropicalis, C. glabrata 70164, C. parasilosis, C. insane, C. rhodot...
Article
The total polyphenol and biologically important thiol content of aqueous extracts of ten spices were determined and the antioxidant activity of the spice extracts was examined. High performance liquid chromatography technique was used to determine thiols: glutathione, cysteine, N-acetylcysteine, and homocysteine. DPPH scavenging activities of the s...
Article
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In this paper, the effects of heat treatment on some physicochemical characteristics (brix, pH, colour, hydroxyl methyl furfural (HMF)) and sensory properties (consistency, odour, colour, flavour) of pine and blossom honey samples were determined. Heating temperature and time were found to have important effects, especially on HMF content of the sa...
Article
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Fatty acids and tocopherols in appropriate quantities are invaluable attributes that are desirable in seeds of agricultural products. Studies have generally focused on the evaluation of the oil and tocopherol components of oil crops. Recently, investigations revealed that the grape seed has robust potential in the production of healthy fatty acids...
Article
Chemical compositions of essential oils obtained by hydrodistillation and microwave extraction systems from sage (Salvia fruticosa Mill.), rosemary (Rosmarinus officinalis L.), basil (Ocimum basilicum L.), summer savory (Satureja hortensis L.), winter savory (Satureja thymbra L.) and mint (Mentha spicata L.) were determined with gas chromatography...
Article
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Biochemical and technological properties were determined in developing Myrtus communis L. fruits (myrtle) from Mersin to investigate potential uses. Completely ripe black and white fruits contained ash, crude protein, crude oil, water- and alcohol soluble extracts, tartaric, malic and citric acids, and minerals including Ca, K, P, Mg and Na. Proxim...
Article
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The fatty acid (FA) compositions of carp and yag fish oils provided in April 2009, July 2009 and March 2010, and November 2009 and March 2010 periods were determined via Gas Chromatography (GC). While the main fatty acids of carp oils are determined oleic, palmitic and palmitoleic acids were established as major fatty acids of yag fish oil. Oleic a...
Article
Percentages of crude oil, protein, fibre and ash of grape seeds obtained from Turkish cultivars were of the ranges 5.40-10.79, 5.24-7.54, 17.6-27.1, and 1.2-2.6, respectively. The highest crude oil, crude protein and crude fibre were determined in Siyah pekmezlik, Karadimrit and Antep grape seeds. The energy values of seeds were established to be b...
Article
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The rutin, quercetin, total phenol contents and antioxidant activity of different parts of buckwheat (Fagopyrum esculentum) harvested at the different growing period in year 2009 were determined. Harvest period and plant parts had affected on these bioactive properties (p < 0.01). Rutin values ranged from 1874.97 (stem) to 3329.99 (leaf) mg/g. Quer...
Article
In this study, crude ash, protein, oil, mineral and total phenolic contents, and antioxidant properties of Enteromorpha intestinalis (L.) Kütz. and Cladophora glomerata (L.) Kütz. seaweeds were determined. The samples were collected from Acıgöl Lake in Karapınar town of Konya in Turkey. The crude ash, crude oil and protein content of E. intestinali...
Article
The proximate properties, the fatty acid and mineral contents of different almond kernel varieties were determined. The crude protein contents of kernels ranged between 12.7% (guara) and 16.3% (cristomorto). The oil yields from these kernels were established between 48.8% (cristomorto) and 55.7% (ferragnes). The acidity value of oils were found bet...
Article
Some physico-chemical characteristics, fatty acids and mineral contents of pumpkin, sweet pumpkin, melon, watermelon, paprika, tomato and cucumber seeds were determined. All seeds contained at the high levels of lipid (15.6–51.8 %) and protein (19.8–39.9 %). Among the cultivars studied, tomato seed contained the highest potassium (10542.1 mg/Kg). K...
Article
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The nutrients and physical properties of the five samples of apricot (Prunus armeniaca L.) kernels were determined in this study. Physical properties such as mass, length, width, thickness, geometric average diameter, sphericity, surface values, volume, bulk density, kernel density, porosity, terminal velocity, projected area and rupture strength,...
Article
Fatty acid composition of pericarp and seed of Rhus coriaria L., grown wild from ten different regions of Turkey, was determined. Fatty acid analysis was carried out by gas chromatography (GC). The main fatty acids of pericarps were oleic (33.78-52.57%), palmitic (16.99-29.76%), linoleic (11.60-21.91%) and linolenic (0.33-1.33%) acids. In addition,...
Article
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The antioxidant activity and total phenolic content of some spices (M. piperita L., R. coriaria L., T. spicata, S. officinalis, R. officinalis L., C. ovata L., O. vulgare L., L. nobilis L. and C. annum L.) were determined. The higher TEAC values (mmol TE/g extract) were obtained for sage (1.783) and rosemary (1.241). The IC value (mg/ml) ranged bet...
Article
Lactic acid, citric acid, yogurt and starter culture (Lactobacillus plantarum) inoculation were tested singly in brines for the fermentation of raw caper buds (Capparis ovata Desf. var. canescens). The buds were divided into two different sizes, small and big, according to their diameters before fermentation, and the effects of bud size on the ferm...
Article
Sage (Salvia fruticosa L.), anise (Pimpinella anisum L.), Hawthorn (Crataegus orientalis), rosemary (Rosmarinus officinalis L.), mountain tea (Sideritis spp), basil (Ocimum basilicum L.), lime flower (Tilia cordata), nettle (Urtica dioica L.), thyme (Thymbra spicata), coriander (Coriandrum sativum L.), rosehip (Rosa canina L.), mentha (Mentha piper...
Article
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Olive varieties from different locations in Turkey and their natural oils which were obtained using traditional methods were used. Five olive samples were considered for their moisture, crude oil, crude protein, crude ash, crude energy, crude fiber, pH and alcohol-soluble extract. Olives contained approximately 17.7 %-43.5 % olive oil. The crude fi...
Article
Leaves of three different cultivars of Vitis vinifera L., Ekşikara, Hesapali and Siyah pekmezlik were fermented in 10% brine and 10% brine + 1% citric acid concentration for 5 weeks. Percent dry matter, average weight, protein and dimethyl sulfide content of fresh leaves were determined. During the fermentation time, chemical properties of brine (t...
Article
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The chemical composition of the flower and unripe and ripe fruits from fennel (bitter) (Foeniculum vulgare ssp. piperitum) has been examined by gas chromatography and gas chromatography-mass spectrometry. The main identified components of the flower and unripe and ripe fruit oils were estragole (53.08%, 56.11%, and 61.08%), fenchone (13.53%, 19.18%...
Article
Sun drying and oven drying (50 °C) characteristics of basil (Ocimum basilicum L.) were determined. The effect of these drying methods on the mineral content of fresh, oven dried and the wire basket sun dried basil were compared. Oven drying resulted in increased drying rates and shorter drying time. Basil can be oven dried at 50 °C to 17.31% moistu...
Article
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Sideritis species are traditionally used as teas, flavoring agents and for medicinal purposes in Turkey. In this study, the antioxidant and antimicrobial activities of Sideritis condensata Boiss. & Heldr. (SC) and Sideritis eryhrantha var. erythrantha Boiss. & Heldr. (SE) endemic species' extracts of Lamiaceae were determined. These extracts were i...
Article
Bee pollen and propolis were collected from Apis mellifera colonies in five regions of Turkey. The antifungal properties of methanol extracts of pollen and propolis (2% and 5% concentrations) were determined on Alternaria alternata and Fusarium oxysporium f. sp. melonis. The least active concentration towards the tested fungi was 2% concentration o...
Article
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Phytochemicals, antioxidant capacity and minerals of 4 different varieties of wild strawberry obtained from Tokat regions and one variety of strawberry (Fragaria arten) abtained from Konya-Akşehir region in Turkey were determined. While the highest anthocyanin content in strawberries was determined as 273,89 mg/kg for F.arten variety, the less anth...
Article
Bee polen and propolis were collected from Apis mellifera colonies in 5 regions of Turkey. The antifungal pr operties of methanol extracts of pollen and propolis (2% and 5% concentrations) were determined on Alternaria alternata and Fusarium oxysporium f. sp . melonis . The least active concentration towards the tested fungi was 2% concentration of...
Article
Full-text available
Recently, more attention has been focused on the utilization of food processing by products and wastes, as well as un-der-utilization agricultural products. Some physical and chemical properties, mineral contents and fatty acid composi-tion of apricot kernel and oils were determined. The oil yields from kernels changed from 42.2% to 57.2%. The crud...

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