Darbo tikslas: atlikti vartotojų apklausą apie ekologiškos kiaulienos pasirinkimą, palyginti ekologinėmis ir įprastinėmis sąlygomis išaugintų Lietuvos baltųjų kiaulių mėsos savybes. Darbo uždaviniai: atlikti vartotojų apklausą apie ekologiškos kiaulienos pasirinkimą, jų žinias apie Lietuvos baltųjų kiaulių veislės kiaulienos savybes; atlikti Lietuvos baltųjų kiaulių išaugintų ekologinėmis sąlygomis skerdenos kokybės, mėsos fizinių, cheminių rodiklių tyrimą, mėsos kai kurių technologinių savybių (vandens rišlumo, tekstūros rodiklių ir kt.) analizę; gautus tyrimo rezultatus palyginti su Lietuvos baltųjų kiaulių, išaugintų įprastinėmis sąlygomis, mokslinėje literatūroje pateiktais skerdenos kokybės, mėsos fiziniais, cheminiais rodikliais ir kai kuriomis technologinėmis savybėmis. Tyrimai atlikti 2013 m. LSMU ir Kauno technologijos universiteto Maisto instituto Chemijos laboratorijose. Skerdenas atvėsinus (praėjus 24 val.) buvo nustatytas: lašinių storis (ties 10 šonkauliu), ilgiausiojo nugaros raumens skerspjūvio plotas, kumpio masė (kg), aktyvusis rūgštingumas (pH), raumeningumas. Ekologinėmis sąlygomis išaugintų Lietuvos baltųjų veislės 6 kiaulių skerdenų, sveriančių apie 90 kg, mėsos cheminei sudėčiai, fiziniams bei technologiniams rodikliams, buvo paimti 6 mėginiai. Praėjus 48 val. po skerdimo, buvo nustatytas: mėsos spalvingumas, mėsos vandens rišlumas, virimo nuostoliai, mėsos vandeningumas, mėginių tekstūros savybės bei baltymai. Gauti rezultatai. Atlikus apklausą... [toliau žr. visą tekstą] / Purpose: to do consumers survey about about organic pork selection, to compare Lithuanian white swine meat properties of Lithuanian white swines raised in organic and typical conditions. Tasks: to do consumers survey about organic pork choice their knowledge of Lithuanian White pig breed pork qualities; to do Lithuanian White pigs reared in organic conditions research of carcass quality, meat physical, chemical indicators, some of meat technological properties (water holding capacity, texture parameters, etc.). analysis; these results compare with Lithuanian White pigs, reared under typical conditions, in the scientific literature carcass quality, meat physical, chemical indicators and some technological properties. Research were carried out in 2013 LSMU and Kaunas University of Technology, Institute of Food Chemistry labs. Carcasses after chilling (24 hrs.) were observed: backfat thickness (10th rib), loin muscle cross-sectional area, ham weight (kg), the active acidity (pH), lean meat. Organic grown Lithuanian white breed pigs 6 carcasses about 90 kg weight of study meat chemical composition, physical and technological characteristics were taken 6 samples. At 48 h post-mortem was set meat color, meat water holding capacity, cooking loss, drip of meat, the texture characteristics of the samples and proteins. Results. Found out that more expensive organic pork purchases by respondents' income was not statistically significant (p = 0.941). In assessing whether the purchase... [to full text]

Introduction. At low temperature the preservation of foodstuffs is one of the best ways of their storage and therefore this method is widely used in meat industry. The low temperature suppresses the activity of microorganisms and tissue ferments. Therefore the meat preserved by freezing keeps for a long time its initial properties and there are only minimal changes of food value and taste. At low temperature the activity of ferments slows down but does not stop. Work object. The work object is the determination of the change of physical-chemical properties of meat during freezing and keeping in - 180 C and - 860 C temperature. Work methodics. The research as fulfilled at the laboratory of the evaluation of the cattle meat properties and the meat quality. For the rersearch taken 14 Lithuanian white pig meat samples the mean weight of which was 500 g. were taken. They were put into special freezing bags and were frozen at temperature -180 C, and -860 C. Before freezing it the physical-chemical properties of the meat were determined. Two examples from each meat samples were researched. The determination of the physical-chemical properties of the meat was fulfilled every month. Also were was taken 6 Lithuanian white pig meat samples the mean weight of which was 500 g. Before freezing it the physical-chemical properties of the meat were determined. After that was made green tea extract, 500 ml. Water ant 50 g tea. All extract was inject in to the meat samples. They were put... [to full text]