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  • Author or Editor: R. Božac x
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Authors: R. Božac, I. Kos, Z. Janječić, Ž. Kuzmanović, M. Konjačić and J. Nežak

An investigation has been carried out on the effect of different crossbreeds on chemical and sensory profiling of Croatian representative pork products, Istrian hams. Due to the original trimming of hams (without skin and subcutaneous adipose tissue) the total weight loss was significantly higher (41.67–43.69%) in all three genotypes (Swedish Landrace×Dutch Large Whit ×Pietrain (SL×DLW×P), Dutch Large White×Swedish Landrace (DLW×SL) and Dutch Large White×Duroc (DLW×D)) in comparison with the Italian and Spanish hams with skin and subcutaneous adipose tissue. Hams from DLW×D genotype had a significantly lower (P<0.01) total weight loss (41.67%) and, in comparison with the Spanish and Italian hams, Istrian ham contains much less moisture (45.05–46.35%). The content of total saturated, monounsaturated, polyunsaturated fatty acids and cholesterol was similar in all crossbreeds (P>0.05). The cholesterol level is low (541.9–555.9 mg kg−1), which makes Istrian dry-cured ham a dietary product. Hams from DLW×D had significantly more visible intramuscular fat (P<0.01) than hams from SL×DLW×P crossbreeds. The colour of muscle tissue, seasoned flavour, taste, saltiness, total mouth consistency (tender, melting, stringy) and tactile consistency were best in genotype DLW×D.

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The effect of feeding different levels (10 and 20%) of dehydrated olive cake pulp on certain blood parameters and on the catalytic activity of serum enzymes was studied in fattening rabbits. A total of 60 rabbits were divided into a control group (C) and two experimental groups (E1, E2), each comprising 10 males and 10 females. Rabbits of Group C received no dehydrated olive cake pulp in their diet, while rabbits of Group E1and Group E2were fed 10% and 20% dehydrated olive cake pulp, respectively. After Day 56 of the experiment, blood samples were obtained by cardiac puncture and certain blood parameters as well as the catalytic activity of serum enzymes were determined. Following the experimental feeding period no significant differences were found between Group C and Groups E1and E2in red blood cell (RBC) and white blood cell (WBC) count, haemoglobin concentration and haematocrit value. Similarly, after 56 days of experimental fattening no significant differences were found between the control group and the experimental groups in the catalytic activity of the serum enzymes alkaline phosphatase (AP), aspartate aminotransferase (AST), gamma-glutamyltransferase (GGT), and lactate dehydrogenase (LDH). However, Group E2 rabbits manifested a significantly higher alanine aminotransferase (ALT) activity in the serum than did rabbits of Group E1. The results indicate that the inclusion of dehydrated olive cake pulp in the diet at the rate of 10% or 20% caused no changes in the investigated blood parameters and serum enzyme activities of fattening rabbits.

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