Plant essential oils (EOs) serve as a «safe» alternative to chemical or synthetic antimicrobials and antioxidants to struggle with the food borne pathogens or spoilage organisms, inhibiting lipid oxidation and thus extend shelf life of ground beef application. In our study, we investigated the effectiveness of thyme oil (Thymus vulgaris) at concentrations (1%, 1.5% and 2%) and cinnamon oil (Cinnamomum zeylanicum) at concentrations (0.5%, 1% and 1.5%) as natural preservatives as well as their ability to increase the shelf life of minced meat and also their effects on chemical, microbial analysis and sensory properties of minced meat when been stored at 2°C for 12 days storage period. thyme and cinnamon oils at different concentrations effect on improving sensory properties of minced meat, act as antioxidant, antimicrobial agent and extend shelf life of minced meat for 6 days more than control samples, thyme>cinnamon. High concentration of oil more effective in meat quality and shelf life more than lower concentrations used. thyme and cinnamon oils at different concentrations effect on improving sensory properties of minced meat, act as antioxidant, antimicrobial agent and extend shelf life of minced meat for 6 days more than control samples, thyme>cinnamon. High concentration of each of oil more effective in meat quality and shelf life more than lower concentrations used.

The objective of the present study was to investigate the effects on growth performance, meat quality parameters and fatty acids of meat by restricted diet amount on finishing Berkshires. A total of 180 pigs (Berkshire, initially 52 kg BW) at 100 days of age were allotted in arrangement in a completely randomized design (10 pigs per pen), blocked arrangement of treatments with 3 replications. The variables were market ages (180, 200 and 220 days) and in which was also included sex (gilts and barrow). All the pigs were restrictively fed so that day could be marked at 103 kg. Pork quality was evaluated from 4 pigs of each treatment. Average daily gain (ADG) and average daily feed intake (ADFI) were decreased (p<0.05) with age increase. The ratio of feed to gain was increased (p<0.05) at 200 and 220 days compared to that of 180 days. Moisture and crude protein of longissimus dorsi muscle (LM) at 180 days were increased (p<0.05) compared to 200 and 220 days. Crude fat was increased (p<0.05) by age and crude ash was lower (p<0.05) at 180 days than at 220 days. Red to green meat color scale (CIE a*) increased (p<0.05) at 200 and 220 days more than at 180 days. Regarding fatty acid composition in meat, saturated fatty acids (SFA) was increased more (p<0.05) at 220 days than at 180 and 200 days. The results indicate that even with a restricted diet of low nutrient supplement, there was an improvement in Berkshire meat quality parameters.

This experiment was conducted to determine the effects of dietary copper levels on performance, carcass characteristics, and economical analysis in Hanwoo steers. Fifteen Hanwoo steers weighing about 300 kg were randomly allotted into one of three treatments. The three treatments consisted of Control(7 mg Cu/kg feed), TI(12 mg Cu/kg feed) and TII(17 mg Cu/kg feed). Copper was formulated with concentrate from copper sulfate(CuSO4) and animals were fed the diets supplemented with copper from 300 kg untill about 630 kg of body weight.Dietary copper levels did not affect daily weight gain, feed intake and feed efficiency during the whole feeding period. Dressing percentage, rib eye area and backfat thickness were not different between animals fed the diets supplemented with copper. Animals fed the diets supplemented with copper received the same B grade in yield grade.Animals fed the diets supplemented with copper received same marbling score. Beef color, fat color, texture and maturity were not affected by Cu supplementation in diet. Animals received the same first grade between treatments in quality grade. Animals fed the diet supplemented with 12 mg of copper per kg diet was higher in profit by 13.3% than animals fed the control diet.According to these results, it may be concluded that performance, yield and quality grade were not affected by the Cu levels of 7 to 17 mg per kg feed but crude income was enhanced when Hanwoo steers were fed the diet containing 12 mg Cu/kg feed.