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  • Author: Zbigniew J. Dolatowski x
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Karolina M. Wójciak, Monika Trząskowska, Danuta Kołożyn-Krajewska and Zbigniew J. Dolatowski

Abstract

The objective of this work was to study the oxidative stability of organic dry fermented probiotic sausages during long-term storage (6 months). Four test samples were prepared: sample A - control sausage, sample B - with 0.05% addition of sodium ascorbate, sample C - with addition of Lb. casei LOCK 0900 (2x106 CFU/g) probiotic strain, 0.6% of glucose, and 0.05% of sodium ascorbate, and sample D - with 0.05% of sodium ascorbate, probiotics, and 0.6% of lactose. The study covered evaluation of the ripening process (21 d) by evaluating loss in the sausage weight. The pH value, oxidation-reduction potential, TBARS values, acid number, peroxide number, browning index after ripening (0) and after 2nd, 4th, and 6th month of chilling storage were identified. The total colour difference of sausages subjected to 3 h exposure to fluorescent light, texture parameters, and count of lactic acid bacteria (LAB) were identified after ripening (0) and after 6 months of storage. It was observed that an addition of probiotic bacteria and glucose (sample C) contributed to a significant decrease in the pH value and water activity in the sausage directly after ripening and during the entire chilling storage period. In samples with probiotics the option with glucose had a lower (P≤0.05) pH value by ca. 0.5 unit as compared to the sample with lactose. Significantly higher (P≤0.05) values of TBARS were observed in samples with probiotics as compared to control samples. The greatest oxidation stability during the entire chilling storage period was found in the sample with sodium ascorbate. Among samples with probiotic strain, the sample with glucose had the lowest peroxide number value (0.58-3.56 meqO2/kg) and TBARS (1.10-2.08 mg MDA/kg) but also the greatest colour stability during exposure to light. The order of decline in oxidative stability was: sample B > sample C > sample D > sample A.

Open access

Małgorzata Karwowska, Małgorzata Grabowicz, Joanna Stadnik, Piotr Szterk, Zenon Bernacki and Zbigniew J. Dolatowski

Abstract

The aim of this study was to assess the production parameters of White Koluda® geese fed with a corn or beet pulp silage supplemented diet. The oxidative stability of breast and thigh muscles during frozen storage and the fatty acid composition of abdominal fat were also investigated. Measurements were carried out on a total of 42 geese of the White Koluda® W31 strain that were divided into three experimental groups: group I (control) - basal diet, group II - basal diet with corn silage addition, group III - basal diet with pressed beet pulp silage addition. Diets containing ad libitum maize silage or sugar beet pulp silage supplemented with a limited amount of commercial diets, significantly reduced BW (about 9%) and ADG (about 27%) of birds compared to the control group in the 14th week of rearing. Feeding corn or sugar beet pulp silage to geese did not affect pH values, heme iron content, colour parameters but decreased lipid oxidation values in muscles 3 days after slaughter. The abdominal fat of geese fed with the pressed beet pulp silage supplemented diet was characterized by a significantly higher content of myristic and linoleic acid and a lower content of oleic acid. In conclusion, feeding geese with limited amount of commercial mixtures supplemented with maize or sugar beet pulp silages may be recommended primarily for increasing financial efficiency in White Koluda® geese farms but also for improving the quality of goose carcasses, due to their low fat and high quality of meat.