Search

Your search keyword '"Jarosova, Alzbeta"' showing total 9 results
Start Over Author "Jarosova, Alzbeta"
9 results on '"Jarosova, Alzbeta"'

5. PROTEIN DEGRADATION AND FAT OXIDATION CHANGES IN SALTED MEAT PROCESSING.

Author

Cubon, Juraj, Hascik, Peter, Pavelkova, Adriana, Tkacova, Jana, Hleba, Lukas, Bucko, Ondrej, Jarosova, Alzbeta, and Cisarova, Miroslava

Subjects
PROTEOLYSIS, VACUUM packaging, MEAT analysis, MEAT packaging, OXIDATION, MEAT
Abstract

The study presents the results salted, smoked vacuum package pork meat during short maturation time. Samples were as fresh meat before salting, after salting and curing (7th days), and after 28 days of maturation in vacuum package. The average fat content of the fresh semimembranosus muscle (SM) was 1.10 g.100g-1 and in the fresh longissimus dorsi muscle (LDM) 5.58 g.100g-1. The SAFA content in fresh SM was 35.58 g.100g-1 FAME and similar in the LDM was 35.08 g.100g-1 FAME. The MUFA content in fresh SM was 50.18 g.100g-1 and in LDM was higher 51.29 g.100g-1 FAME. The PUFA content in fresh SM was 13.28 g.100g-1 FAME and in LDM and was 13.56 g.100g-1 FAME. The TVB-N content in fresh SM was 6.35 mg.100g-1, after 7 days of salting and curing was similar 6.61 mg.100g-1 and after 28 days maturing increased to 19.65 mg.100g-1. The TVB-N content in the fresh LDM was 7.22 mg.100g-1, after 7 days of salting 7.58 mg.100g-1 and after 28 days of maturing increase to 22.09 mg.100g-1. The content of MDA in fresh SM was 0.056 mg.kg-1 after 7 days of salting and curing was similar 0.06 mg.kg-1 and after 28 days of maturation increased to 0.11 mg.kg-1. The content of MDA in the fresh LDM was 0.046 mg.kg-1 after 7 days of salting 0.05 mg.kg-1 and after 28 days of maturation process 0.09 mg.kg-1. The acid number in the fresh SM was 0.88 mg.KOH.g-1, after 7 days of salting 2.15 mg.KOH.g-1 and after 28 days of ripening 2.26 mg.KOH.g-1. The acid number of fresh LDM was 1.13 mgKOH.g-1, after 7 days salting and curing 2.04 mgKOH.g-1 and after 28 days maturation 2.61 mgKOH.g-1. The peroxide number in the fresh SM was 0.58 mekvO2.kg-1, after 7 day salting 1.03 mekvO2.kg-1, and after 28 days maturation 2.23 mekvO2.kg-1. The peroxide number of fresh LDM was 0.59 mekvO2.kg-1, after 7 days salting 0.98 mekvO2.kg-1, and after 28 days maturation 5.31 mekvO2.kg-1. [ABSTRACT FROM AUTHOR]

Published
2019
Full Text
View/download PDF

8. INFLUENCE OF TIME ON PHTHALATE ESTERS CONCENTRATIONS IN VEHICLE PLASTIC MATERIALS DURING VEHICLE OPERATION.

Author

Kucera, Michal, Jandlova, Marcela, Jarosova, Alzbeta, and Cornak, Stefan

Subjects
*PHTHALATE esters, *PLASTICS, *HIGH performance liquid chromatography, *DIBUTYL phthalate, *CARCINOGENICITY
Abstract

The aim of this work was to determine the concentrations of phthalic acid esters (PAEs) in plastic materials used in automobiles and monitor the changes in concentrations over time. The phthalates can be released into the car interior during the operation of the vehicle and thereby inhaled by the driver, or the PAEs can migrate from plastics to the surrounding contact materials. Esters of phthalic acid are used as plasticizer of plastics. They are not chemically bonded in polymers, so they can migrate into materials, which are in contact with them, leach or evaporate into the environment. Phthalic acid esters have teratogenic and carcinogenic effects and negative effects on the male reproductive system. In this study the most commonly used phthalates were determined: dibutyl phthalate (DBP) and di-(2-ethylhexyl) phthalate (DEHP). Nine samples of plastic materials that are used in the car interior were analysed. The samples were new plastics, which were made for car mounting. Each sample of the plastic material was subdivided into individual components, from which the sample consists, and each part of every sample was analysed separately. The first sample analysis was performed immediately after the obtaining of the plastic samples (after the plastics production) and subsequently after 3 months. The samples of plastic automobile components were transported in the car in the period between the two analyses. The car was used in normal operation. It simulated the actual plastic environment, where these plastics are normally placed. All analyses were performed in triplicate. In total, they were 18 samples of plastics analysed and 108 analyses were performed. Phthalic acid esters were determined by high pressure liquid chromatography. [ABSTRACT FROM AUTHOR]

Published
2018
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results