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Ozbek I.Y.,Ataturk University | Boydas M.G.,Ataturk University | Kara M.,Ataturk University | Demir B.,Provincial Directorate of Agriculture
Postharvest Biology and Technology | Year: 2014

This study presents a low cost measurement setup for estimating apple bruise volume during drop impact tests. The proposed measurement system consists of three main stages namely recording impact sound, signal processing, and estimating bruise volume. In the recording stage, the impact sound occurred when striking the apple on the surface was recorded by a piezoelectric microphone into computer. The impact sound was converted into Shannon entropy signals based on the Kernel density approach, and two measurable quantities namely entropy peak and pulse-width time were extracted from Shannon entropy signals in the signal processing stage. In the bruise volume estimating stage, the regression curves that map entropy peak and pulse-width features into bruise volume are estimated using measurements data. To evaluate the performance of the proposed method, we conducted several drop experiments with six different drop heights and two different temperatures (1 and 19. °C). Experimental results showed that bruise volume was exponentially proportional to the entropy peak and it was inversely proportional to pulse-width time as power functions, and all the curves were fitted with coefficients of determination of more than 0.98. Moreover, it was found that colder apples developed less bruise volume then warmer ones. © 2014 Elsevier B.V. Source

Parlak O.,Provincial Directorate of Agriculture | Zorba O.,Abant Izzet Baysal University | Kurt S.,Adiyaman University
Journal of Food Science and Technology | Year: 2014

This study was accomplished to determine the effects of egg yolk, egg white and sodium carbonate on textural properties of beef patties by using Central Composite Design of Response Surface Methodology. Meat patties were prepared using beef, lamb tail fat and spices. Effects of addition of egg yolk powder (0-1%), egg white powder (0-1%) and sodium carbonate (0-1%) on textural properties were studied by using a texture analyzer. The TPA and cutting force tests were measured in the samples. Effects of sodium carbonate were found to be significant (P∈<∈0.01) on springiness, hardness and cohesiveness values of beef patties. However, effects of egg white and egg yolk on the textural parameters were not found significant (P∈>∈0.05). The levels of sodium carbonate up to 0.72% improved the textural properties of beef patties. © 2011 Association of Food Scientists & Technologists (India). Source

Ali S.,Karakoram International University | Masud T.,Pmas Arid Agriculture University | Abbasi K.S.,University of Haripur | Mahmood T.,Pmas Arid Agriculture University | Hussain I.,Provincial Directorate of Agriculture
Pakistan Journal of Nutrition | Year: 2013

Fresh fruits are increasingly focused in the recent years for their nutritional and health benefits. Research involving simple and safe preservation technologies is at a high demand to satisfy consumer concerns and harvest maximum market potential. The present study was therefore undertaken to assess the response of chemical and bioactive compounds (pH, acidity, ascorbic acid, total phenolics, carotenoids, free radical scavenging capacity and enzyme activity) in apricot under the effect of calcium treatments (1, 2, 3 and 4%) at ambient storage. The results revealed that ascorbic acid, phenolic compounds and carotenoids were least affected in 3 and 2% calcium as compared to control, 1 and 4% CaCl2. Similarly, higher antioxidant capacity and lower enzymatic activity was retained in the same concentrations. Titratable acidity and ascorbic acid decreased in all treatments during storage and higher reduction was observed in control, 1 and 4% as compared to 3 and 2% calcium, respectively. pH, phenolics, carotenoids, antioxidant and enzymatic activity increased initially and it was rapid up to 6th day, followed by a slight decrease during subsequent storage. The overall results demonstrated higher compositional losses in control followed by 1 and 4% calcium treated fruits, while 3 and 2% treatments exerted pronounced effects on keeping quality of apricot during ambient storage up to 12th day. © Asian Network for Scientific Information, 2013. Source

Eken C.,Ardahan University | Eken C.,Ataturk University | Bulut S.,Erciyes University | Ozturk A.,Ataturk University | And 3 more authors.
Journal of Animal and Plant Sciences | Year: 2011

Pink snow mold, caused by Microdochium nivale, is a serious disease of winter wheat (Triticum aestivum) in the Northern Hemisphere. A field study with artificial inoculation was conducted using 38 winter wheat cultivars during the 2002-2003 at Erzurum, Turkey. Significant differences were detected among cultivars for reaction and yield components to the M. nivale. The most resistant winter wheat cultivars were Harmankaya and Pehlivan, and the most susceptible ones were Aytin-97, Ki{dotless}rgi{dotless}z-95 and Bayraktar. Yield components decreased significantly in inoculated plants. Pink snow mold resulted in decreased number of spikes per m2, the grain yield and the plant height of 71.1, 67.3 and 13.2% respectively. Source

Guclu S.,Ataturk University | Ak K.,Black Sea Agricultural Research Institute | Eken C.,Ataturk University | Eken C.,Ardahan University | And 4 more authors.
Bulletin of Insectology | Year: 2010

Lecanicillium muscarium (Petch) Zare et Gams is a widely occurring entomopathogenic fungus. The effect of L. muscarium against Ricania simulans (Walker) (Rhynchota Ricaniidae) was studied under laboratory and field conditions. In laboratory studies, six isolates of L. muscarium were assessed against nymphs of R. simulans, at a single dose (1 × 107 conidia/ml) on tea leaflets. Mortality percentage caused by L. muscarium isolates after a seven-day period varied from 50.95 to 74.76% and median lethal time (LT50) values ranged from 2.34 to 3.90 days. In a field experiment, L. muscarium strain Lm4 was assessed against nymphs and adults of R. simulans, at a single dose (1 × 107 conidia/ml) on kiwifruit plants. The LT50 values for nymphs and adults of R. simulans were 4.18 days and 6.49 days, respectively. The results of the field study indicated that R. simulans nymphs were more susceptible to the fungus than adults. L. muscarium strain Lm4 could be considered as an environmentally friendly alternative for biocontrol of R. simulans. Source

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