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Full-Text Articles in Life Sciences

Color, Phenolic Composition, And Antioxidant Properties Of Hardaliye(Fermented Grape Beverage) Under Different Storage Conditions, Buket Aşkin, Azi̇ze Ati̇k Jan 2016

Color, Phenolic Composition, And Antioxidant Properties Of Hardaliye(Fermented Grape Beverage) Under Different Storage Conditions, Buket Aşkin, Azi̇ze Ati̇k

Turkish Journal of Agriculture and Forestry

This study was conducted to determine the effects of storage temperature and time on color and antioxidant properties of hardaliye. Hardaliye was obtained from papazkarası blue-black grapes as a potential source of anthocyanin pigment and high antioxidant activity. Grape variety plays a significant role in color, flavor, and chemical properties. However, the effects of storage conditions on products and especially on phenolic composition and antioxidant properties are not known because there is not any research about storage effects at different temperatures. For this purpose, hardaliye was produced by the conventional method. After having been exposed to lactic acid fermentation, it …


Utilization Of Color Parameters To Estimate Moisture Content And Nutrient Levels Of Peanut Leaves, Muharrem Keski̇n, Sema Karanlik, Serap Görücü Keski̇n, Yurtsever Soysal Jan 2013

Utilization Of Color Parameters To Estimate Moisture Content And Nutrient Levels Of Peanut Leaves, Muharrem Keski̇n, Sema Karanlik, Serap Görücü Keski̇n, Yurtsever Soysal

Turkish Journal of Agriculture and Forestry

Leaf nutrient levels are traditionally quantified by laboratory chemical analysis, which is time-consuming and requires intensive labor and investment. The objective of this study was to predict the moisture content (MC) and nutrient content of peanut leaves from color parameters (CIE Lab) using a chromameter. This method is faster and requires less labor and investment compared to laboratory chemical analysis. Fifty peanut leaf samples were collected from a commercial peanut field. The samples were analyzed for MC, N, P, K, Ca, Mg, Fe, Mn, Zn, and Cu concentrations after color parameters were acquired by chromameter. A positive and high correlation …


Quality Parameters And Total Phenolic Content In Tomato Fruits Regarding Cultivar And Microclimatic Conditions, Nina Kacjan Marsic, Lea Gasperlin, Veronika Abram, Maja Budic, Rajko Vidrih Jan 2011

Quality Parameters And Total Phenolic Content In Tomato Fruits Regarding Cultivar And Microclimatic Conditions, Nina Kacjan Marsic, Lea Gasperlin, Veronika Abram, Maja Budic, Rajko Vidrih

Turkish Journal of Agriculture and Forestry

The aim of this research was to evaluate the color, firmness, and total phenolic (TP) content in tomatoes according to cultivar and growing conditions. Cultivars with oval, elongated, round, and cherry-shaped fruits of determinate tomato were grown in Mediterranean (Dragonja Valley) and continental regions. Experiments in the continental region were conducted outdoors (Ljubljana-field) and under a low tunnel (Ljubljana-tunnel). Results indicated that the color and firmness were significantly influenced by the typology of the cultivars and by the maturity stage associated with the climatic conditions. Oval, elongated, and cherry fruits had darker and more intensely red fruit skins, with significantly …


The Effect Of Tying And Wrapping Materials And Their Color On Budding Success In Kiwifruit, Hamdi̇ Zengi̇nbal, Hüseyi̇n Çeli̇k, Muharrem Özcan Jan 2006

The Effect Of Tying And Wrapping Materials And Their Color On Budding Success In Kiwifruit, Hamdi̇ Zengi̇nbal, Hüseyi̇n Çeli̇k, Muharrem Özcan

Turkish Journal of Agriculture and Forestry

We studied the effect of tying and wrapping materials and their color on budding success in kiwifruit. The work was done in the open field during 2002-2003. Three-year-old, gallon container grown Hayward seedlings were chip-budded with Hayward chip-bud sticks in the first quarter of May. Raffia (black), cannabis fiber, leathery polyethylene band (white), soft rubbery polyethylene tape (white), paper tape, cotton yarn and plastic string (white) were used as tying and wrapping material in the first experiment. Green, red, black and white raffia was used as wrapping material in the second experiment. In the first trial, the soft rubbery plastic …


Kinetics Of Nonenzymatic Browning Reaction In Citrus Juice Concentrates During Storage, Nuray Koca, Hande Selen Burdurlu, Feryal Karadeni̇z Jan 2003

Kinetics Of Nonenzymatic Browning Reaction In Citrus Juice Concentrates During Storage, Nuray Koca, Hande Selen Burdurlu, Feryal Karadeni̇z

Turkish Journal of Agriculture and Forestry

The kinetics of nonenzymatic browning in citrus juice concentrates (orange, lemon, grapefruit and tangerine) during 8 weeks of storage at 28, 37 and 45 ºC were investigated. Browning development was followed by measuring absorbance at 420 nm (A_{420}) and using CIE-Lab color system. Analysis of kinetic data from A_{420} values suggested a zero-order reaction for nonenzymatic browning, while changes in L* and b* parameters followed a first-order reaction. Activation energy for nonenzymatic browning determined by A_{420} values ranged from 17.60 to 35.27 kcal mol^{-1}, while those for L* and b* parameters were 6.67-28.99 kcal mol^{-1} and 15.38-34.2 kcal mol^{-1}, respectively. …


Variation In Lightness Of White Oak Dimension Stock, Douglas D. Stokke, Anton D. Pugel, John E. Phelps Oct 1995

Variation In Lightness Of White Oak Dimension Stock, Douglas D. Stokke, Anton D. Pugel, John E. Phelps

Douglas D. Stokke

The objectives of this research were to generate a set of sample parameters for the lightness of planed white oak dimension stock, to investigate the effect of grain angle on lightness values, and to determine the level of sampling needed to color match white oak dimension stock on the basis of lightness or darkness as quantified by the parameter L* (psychometric lightness). This information is important when used to determine the feasibility of low-cost portable instruments for evaluating color in an edge-glued hardwood panel production setting. Color measurements were obtained with a portable spectrophotometer interfaced with a notebook computer. The …