scholarly journals Influence of impurities and hull content in material for pressing on sensory quality cold-pressed sunflower oil

2010 ◽  
pp. 69-76 ◽  
Author(s):  
Tamara Premovic ◽  
Etelka Dimic ◽  
Aleksandar Takaci ◽  
Ranko Romanic
Keyword(s):  
Sunflower Oil ◽  
Sensory Quality ◽  
Screw Press ◽  
Simultaneous Presence ◽  
Negative Effect ◽  
Effect Of Impurities ◽  
Cold Pressed ◽  
Time Decrease ◽  
Influence Of Impurities

This paper analyzes influence of different percentage of impurities and hull in the material for pressing on sensory quality (appearance, smell, taste, aroma and colour) of edible nonrefined sunflower oil. It has been concluded that simultaneous presence of impurities and hull in the starting material, especially presence of bigger quantities of impurities, has a rather negative effect on sensory quality of sunflower oil, made by cold pressing on a screw press. Apart from sensory analysis, the effect of impurities and hull on oil colour has also been identified by transparency determining, i.e. content of total pigments - carotenoids and chlorophyll. It has been concluded that presence of bigger quantities of impurities and hull cause the increase of content of both carotenoids and chlorophyll, and at the same time, decrease of transparency value in cold-pressed sunflower oil.

scholarly journals Quality Parameters for Cold Pressed Edible Argan Oils

2013 ◽  
Vol 8 (1) ◽  
pp. 1934578X1300800 ◽  
Author(s):  
Bertrand Matthäus
Keyword(s):  
Oxidative Stability ◽  
Vegetable Oils ◽  
Sensory Quality ◽  
Screw Press ◽  
Raw Material ◽  
High Price ◽  
Argan Oil ◽  
Accelerated Storage ◽  
Cold Pressed

Argan oil belongs to the high-price vegetable oils on the market. Therefore, consumers have the right to purchase a high-quality product. The quality of edible vegetable oils is defined in food standards in which sensory quality is the most important feature. Additional parameters are defined to assess the identity of oils or to evaluate their oxidative state. The sensory quality of cold pressed argan oil is altered if the production has not been performed with reasonable care regarding raw material and extraction. Only oil from roasted seeds extracted by a screw-press had a sufficient sensory quality over a period of 20 weeks without unacceptable sensory attributes. Under accelerated storage conditions oil from roasted seeds extracted by a screw-press remained below the limits given by the Codex Alimentarius or the German guideline for Edible Fats and Oils for peroxide and totox value. Oil from unroasted seeds or oil from goat- digested roasted seeds and extracted by a screw-press, as well as oil from roasted seeds traditionally extracted, exceeded these limits. Initial oxidative stability of oil from unroasted seeds was significantly lower than that of the other oils. After 35 days under accelerated storage, oil from roasted seeds obtained using a screw-press showed the highest oxidative stability. Moreover, tocopherol and phytosterol compositions are useful features of argan oil.

scholarly journals Effects of the contents of impurities and seed hulls on the quality of cold-pressed sunflower oil

2012 ◽  
Vol 30 (No. 4) ◽  
pp. 343-350 ◽  
Author(s):  
E. Dimić ◽  
T. Premović ◽  
A. Takači
Keyword(s):  
Adverse Effect ◽  
Oxidative Stability ◽  
Sunflower Oil ◽  
Screw Press ◽  
Raw Material ◽  
Chemical Characteristics ◽  
Chemical Quality ◽  
Adverse Influence ◽  
Cold Pressed

The effects of different contents of impurities and seed hulls in the raw material on the sensory characteristics, chemical quality, and oxidative stability of sunflower oil prepared by the procedure of cold pressing on a screw press were investigated. It was found that the presence of impurities (up to 10%) and hulls (up to 32%) had an adverse effect on the sensory and chemical characteristics of the oil. The adverse influence on the oils colour was also evidenced from the results of measuring their transparency, which ranged from 14.75% to 43.60%. The presence of impurities and seed hulls caused also a decrease in the oxidative stability of oils, as the values of the induction period ranged from 3.63 h to 4.63 h, while the Totox values were in the range from 2.25 to 5.87.  

Replacing sunflower oil by rumen-protected fish oil has only minor effects on the physico-chemical and sensory quality of Angus beef and beef patties

Meat Science ◽  
2019 ◽  
Vol 154 ◽  
pp. 109-118 ◽  
Author(s):  
C. Wolf ◽  
J. Messadène-Chelali ◽  
S.E. Ulbrich ◽  
M. Kreuzer ◽  
K. Giller ◽  
...  
Keyword(s):  
Fish Oil ◽  
Sunflower Oil ◽  
Sensory Quality ◽  
Beef Patties ◽  
Physico Chemical

scholarly journals Experimental Study to Support Local Sunflower Oil Chains: Production of Cold Pressed Oil in Central Italy

Agriculture ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 231 ◽  
Author(s):  
Foppa Pedretti ◽  
Del Gatto ◽  
Pieri ◽  
Mangoni ◽  
Ilari ◽  
...  
Keyword(s):  
Supply Chain ◽  
Sunflower Oil ◽  
Central Italy ◽  
Central Area ◽  
Market Demand ◽  
Oilseed Crops ◽  
National Production ◽  
Cold Pressed ◽  
By Products

Sunflower is one of the most important oilseed crops cultivated in the world for different purposes. In Italy, the production is mostly located in the central area, representing 70% of Italian production. The market demand for sunflower oil is higher than the national production. There is an increasing request for cold pressed sunflower oil for food application. The success of this activity is linked to a correct setting up and management of the production and supply chain with a valorization of products and by-products. To this aim, information is needed, and this paper is focused on the cultivation of sunflower in central Italy using suitable hybrids, as well as on the study of the cold extraction performance of the sunflower seed produced and the quality of by-products and residues. Results indicate that, on average, a range of about 1.0–1.5 t ha−1 of cold pressed oil and different amounts of by-products can be obtained. According to a proposed scenario, 30 ha cultivated with sunflower are needed to create a complete supply chain within the farm, avoiding many additional passages and maintaining all the value for the farmer. It is important to use suitable hybrids for obtaining good yield, but also the cold extraction performances are important because they also affect the quality of by-products and residues that can be valorized themselves to improve sustainability.

scholarly journals Performances and sensory quality of broilers fed with different levels of extruded rapeseed meal

2012 ◽  
Vol 28 (4) ◽  
pp. 827-834
Author(s):  
D. Milic ◽  
V. Stanacev ◽  
V. Stanacev ◽  
N. Milosevic ◽  
N. Puvaca ◽  
...  
Keyword(s):  
Sensory Quality ◽  
Rapeseed Meal ◽  
Control Group ◽  
Hybrid Line ◽  
Breast Meat ◽  
Heat Treated ◽  
Negative Effect ◽  
Treated Breast ◽  
Different Levels

In this paper the effect of extruded rapeseed meal on the performance and sensory quality of the breast meat of broilers was investigated. The experiments were performed with hybrid line ROSS 308. The control group was fed soybean meal, and two levels of extruded rapeseed meal were added in experimental groups, 4% and 8% during a period of 42 days. Final body masses of chicken in the experimental groups were lower for 1.79% and 3.05% than the control group. Conversion of feed was satisfactory in all groups, and the best in the control group. Including extruded rapeseed meal in the meal did not show negative effect on the sensory quality, the smell and the colour, of fresh breast meat. Sensory quality (smell, taste and sensitivity) of heat-treated breast meat of the chickens in the control and experimental groups was marked as "very good", or optimal.

scholarly journals Impact of the seed storage time on the quality of cold-pressed sunflower oil

2014 ◽  
pp. 67-77 ◽  
Author(s):  
Tamara Premovic ◽  
Sanja Dimic ◽  
Olga Radocaj ◽  
Etelka Dimic
Keyword(s):  
Oxidative Stability ◽  
Sunflower Oil ◽  
Storage Time ◽  
Seed Storage ◽  
Oxidation Products ◽  
Sensory Profile ◽  
Quality Aspects ◽  
Cold Pressed ◽  
The Impact

The objective of this study was to investigate the impact of seed storage time on the quality of cold-pressed sunflower oil. The quality and oxidative stability of oil was determined in samples of domestic varieties of sunflower hybrid, linoleic type seeds, obtained from fresh seeds and from seeds stored in silo cell for 6 and 12 months at temperature below 30oC and in good ventilation conditions. It was found that the longer storage time of seeds had a negative impact on many quality aspects of the oil, such as flavor, odor and aroma, primarily on the sensory profile. Chemical characteristics and oxidative stability of oil were also influenced by the storage time, which was confirmed by increased values of the acid value (AV) and peroxide value (PV) of the oil samples. Fresh seed oil had an AV of 0.49?0.01 mgKOH/g, while oils that were obtained from one-year old seeds had an AV of 1.95?0.02 mgKOH/g. Content of the primary oxidation products in the oil obtained by cold-pressing of the fresh seeds was 1.73?0.02 mmol/kg (measured as PV), and 2.22?0.07 mmol/kg in that from the seeds stored for 12 months. The anisidine value for the oil obtained from the seeds stored for 12 months was 0.86?0.04 (100A1% 350nm).

scholarly journals Effect of Various Cooking Methods on Technological and Sensory Quality of Atlantic Salmon (Salmo salar)

Foods ◽  
2019 ◽  
Vol 8 (8) ◽  
pp. 323 ◽  
Author(s):  
Głuchowski ◽  
Czarniecka-Skubina ◽  
Wasiak-Zys ◽  
Nowak
Keyword(s):  
Salmo Salar ◽  
Sensory Quality ◽  
Consumer Preference ◽  
Sensory Profile ◽  
Cooking Methods ◽  
Steam Cooking ◽  
Negative Effect ◽  
Raw Fish ◽  
Sous Vide

The aim of the study was to evaluate the effect of heat treatment salmon quality using the sous-vide method (57 °C, 20 min and 63 °C, 80 min) in comparison with traditional methods (steam cooking, roasting). The yield of process and sensory quality (sensory profile, consumer liking) and the color and texture of salmon was measured. Salmon processed with the sous-vide method was characterized by a statistically significantly (p ≤ 0.05) higher yield and water content than the samples prepared by steaming and roasting. Statistically higher (p ≤ 0.05) consumer preference for salmon prepared using higher parameters of the sous-vide process (63 °C, 80 min) compared with low parameters (57 °C, 20 min) was stated. Parameters of the sous-vide processing (57 °C, 20 min) have a negative effect on salmon quality. It was observed that as the temperature and time of the process increased, the intensity of the flavor and odor attributes of cooked fish also increased, while the intensity of raw fish, juiciness, tenderness, and softness decreased. The color of salmon also changed. Based on the results, we recommend the following parameters of process in preparing salmon using the sous-vide method: 63 °C for 80 min.

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