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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Polifenolių poveikio triušių virškinimo procesams vertinimas / Evaluation of polyphenols impact on rabbits‘ digestive processes

Bingelytė, Karolina 18 June 2014 (has links)
Darbo tikslas: ištirti juodųjų serbentų (Ribes nigrum L.) produktų, pasižyminčių antioksidantinėmis savybėmis įtaką triušių virškinimo procesams ir produktyvumui. Darbo tikslas įgyvendintas sprendžiant šiuos uždavinius: 1) aukštos apykaitynės energijos gautos iš padidinto riebalų kiekio racionų sudarymas, žolės miltus pakeičiant juodųjų serbentų išspaudomis; 2) nustatyti triušių kūno svorio, priesvorio, pašarų sąnaudų su juodaisiais serbentais sąveiką; 3) ištirti juodųjų serbentų išspaudų įtaką atskirų virškinimo trakto segmentų turinio pH ir sausųjų medžiagų kiekiui;4) nustatyti juodųjų serbentų išspaudų įtaką klubinės žarnos turinio klampumui, aklosios žarnos turinio amoniako kiekiui; 5) ištirti trumpųjų grandinių riebalų rūgščių (TGRR) koncentraciją ir sudėtį aklojoje žarnoje; 6) nustatyti juodųjų serbentų išspaudų įtaką aklosios ir gaubtinės žarnų turinio baltymų, bakterijų fermentiniams (α- ir β-galaktozidaziniams, gliukozidaziniams, α- ir β-gliukozidaziniams ir β-gliukuronidazidaziniams) aktyvumams ir lakiųjų riebalų rūgščių (LRR) kiekiams; 7) nustatyt ipoveikį triušių antioksidantinio aktyvumo rodikliams; 8) nustatyti poveikį biocheminiams kraujo rodikliams; 9) ištirti triušių aterogeniškumo ir atsparumo insulinui rodiklius. Išvados: 1) Juodųjų serbentų išspaudų naudojimas pakeičiant žolės miltus, patvirtino hipotezę, kad jos gali būti laikomos veiksminga ir prieinama pašarų sudedamąją dalimi triušių racionuose. 2) Raciono papildymas juodųjų serbentų išspaudomis... [toliau žr. visą tekstą] / Researches were conducted in the Animal Husbandry Department of the Veterinary Academy of Lithuanian Health Sciences University, also in the vivarium of Lithuanian Veterinary Academy and in the Institute of Animal Reproduction and Food Research of the Polish Academy of Sciences. New Zealand rabbits were used for the researches. All rabbits were calved over one cycle of reproduction (50 percent were male and 50 percent were female). All rabbits were assigned to four groups of five individuals each. The rabbits of the control group (K) were fed a standard diet; the group KP was fed a standard diet with increased fat volume. The rabbits of the group E were subjected to a standard diet with the addition of blackcurrant polyphenolic extract (1,5 percent), the animals of the group EP were fed a standard diet with increased fat volume + blackcurrant extract (1,5 percent). Duration of the research was 45 days. Rabbits were stored in the individual flat-bottomed wire cages in closed room. Over the research all rabbits were fed and watered ad libitum. The research included observation of rabbit growth dynamics, level of ammonia in the substance of cecum, activity of microbe ferments, short-chain fatty acids, and research of overall wellness. Thegoalofthepaper: to investigate the effect of blackcurrant (Ribes nigrum L.) products distinguishing for antioxidant features on digestive processes and productivity of rabbits. The goal of the paper has been achieved by solving the following... [to full text]
2

Antioksidacinio poveikio preparatų su juodųjų serbentų (Ribes nigrum L.) uogų ekstraktu tyrimas ir vertinimas / Development and evaluation of antioxidant preparations containing black currant (Ribes nigrum L.) berries extract

Kasparavičienė, Giedrė 26 January 2006 (has links)
Growing numbers of morbidity and mortality due to the cancer and coronary heart disease is recognized as the increasing challenge in the world. The initial stage of these diseases, early diagnosis and treatment are the main objectives of current researches. According to Lithuanian Health Information Centre morbidity and mortality due to these diseases in Lithuania exceed average of European Union. The oxidative stress occurs in cells as a result of normal physiological processes and environmental interactions, and the complex antioxidant defense system are of particular importance in protecting biological systems against oxidative damage by free radicals. Recently polyphenols and anthocyanins containing foods and preparations have attracted attention due to their health promoting benefits. Anthocyanins make one of the main groups of flavonoids, and represent polyphenolic compounds, that are found in vegetables and fruits, particularly in berries. An important effect of anthocyanins is the scavenging of oxygen-derived free radicals. They can interfere with few different free radical-producing systems, and can increase the function of the endogenous antioxidants. The aim of the research is to choose sources for the products with antioxidant activity from plants cultivated in Lithuania, evaluate quality and antioxidant activity of black currant, red currant and chokeberry products, to develop and evaluate technologies of phytopharmaceuticals with antioxidant activity... [to full text]

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