magistrsko delo
Nejc Valcl (Author), Špela Malovrh (Reviewer), Alenka Levart (Mentor), Janez Salobir (Co-mentor)

Abstract

Proizvodnja oljčnega olja iz leta v leto narašča, zaradi česar nastane vedno več stranskih proizvodov, kot so oljčni listi in tropine. Oljčni listi in tropine niso dober vir hranil in energije, a so bogat vir polifenolov. Polifenoli imajo tudi antioksidativno delovanje in tako prispevajo k zaščiti živali pred oksidativnim stresom. Cilj raziskave je bil ugotoviti vpliv dodajanja oljčnih listov in tropin v krmne mešanice na kazalnike oksidativnega stresa pri rastočih prašičih. V sklopu poskusa smo v bilančne kletke individualno uhlevili 24 rastočih prašičev, težkih 10–12 kg, starosti 40–55 dni. Razdeljeni so bili v tri skupine po osem živali. Živali v skupini Kontrola smo krmili z osnovno krmno mešanico, živali v skupini Listi z osnovno krmno mešanico z dodatkom 7,5 % oljčnih listov, živali v skupini Tropine pa z osnovno krmno mešanico z dodatkom 7,5 % oljčnih tropin. Živali smo krmili restriktivno. Med poskusom smo zbirali blato in seč, na koncu smo jim odvzeli vzorce krvi. Rezultati so pokazali ugoden vpliv dodajanja oljčnih listov na maščobnokislinsko sestavo krvne plazme, povečanje aktivnosti encimov desaturaz v krvni plazmi, a poslabšanje absorpcije maščobnih kislin. Dodajanje oljčnih listov in tropin ni imelo vpliva na koncentracije vitamina E, antioksidativna kapaciteta v maščobah topnih antioksidantov (ACL) in antioksidativna kapaciteta v vodi topnih antioksidantov (ACW) v krvni plazmi. Prav tako dodatka nista imela vpliva na preučevane kazalnike oksidativnega stresa: malondialdehid (MDA), F2-izoprostanov, oksidirani lipoproteini majhne gostote (oxLDL) in 8-hidroksi-2'-deoksigvanozin (8-OHdG).

Keywords

prašiči;prehrana živali;oljčni listi;oljčne tropine;oksidativni status;magistrske naloge;

Data

Language: Slovenian
Year of publishing:
Typology: 2.09 - Master's Thesis
Organization: UL BF - Biotechnical Faculty
Publisher: [N. Valcl]
UDC: 636.4.084/087(043.2)
COBISS: 20889091 Link will open in a new window
Views: 688
Downloads: 156
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Other data

Secondary language: English
Secondary title: Effects of olive leaves and cake on parameters of oxidative stress in growing pigs
Secondary abstract: Olive oil production is increasing year by year, resulting in increased quantities of by-products, such as olive leaves and cake. Olive leaves and cake are not a good source of nutrients and energy, but are an abundant source of polyphenols. Polyphenols act as antioxidants and thus help to protect the animals from oxidative stress. The goal of this study was to evaluate the effect of adding olive leaves and cake to feed mixtures on parameters of oxidative stress in growing pigs. As a part of the experiment, 24 growing pigs, weighing 10–12 kg and aged 40–55 days, were individually housed in metabolic cages. They were divided in three groups of eight animals. Control group (Kontrola) was fed with basic feeding mixture, leaves group (Listi) was fed with basic feeding mixture with added olive leaves in concentration of 7.5 %, and the cake group (Tropine) was fed with basic feeding mixture with added olive cake in concentration of 7.5 %. During the experiment, faeces and urine were collected, and at the end of the experiment blood samples were collected. The results showed a beneficial effect of adding olive leaves on fatty acid composition in plasma and on increase in the activity of the desaturase enzymes in plasma but also showed an impairment of the absorption of fatty acids. Supplementation of olive leaves and cake had no effect on the concentrations of vitamin E, lipid-soluble antioxidant capacity (ACL), and water-soluble antioxidant capacity (ACW) in blood plasma. The supplements also had no effect on the markers of oxidative stress: malondialdehyde (MDA), F2-isoprostanes, oxidised low-density lipoprotein (oxLDL), and 8-hydroxy-2’ –deoxyguanosine (8-OHdG).
Secondary keywords: pigs;animal nutrition;olive leaves;olive cake;oxidative status;
Type (COBISS): Master's thesis/paper
Study programme: 0
Embargo end date (OpenAIRE): 1970-01-01
Thesis comment: Univ. v Ljubljani, Biotehniška fak., Oddelek za zootehniko
Pages: X, 53 f.
ID: 11872282