• Asian-Australasian Journal of Animal Sciences
• /
• v.24 no.3
• /
• pp.351-357
• /
• 2011

An experiment was conducted to evaluate the effects of castration on growth performance, carcass characteristics, and meat quality of goat kids. Fourteen Boer-cross buck and wether goat kids (n = 7; initial body weight (BW) $38.0{\pm}0.35\;kg$ and $34.8{\pm}0.35\;kg$, for bucks and wethers, respectively) were grazed on annual Marshall ryegrass (Lolium multiflorum Lam.) for 56 days. Body weights were recorded after 4 h withdrawal from feed and water for two consecutive days, every 2 wk. After d 56, animals were harvested and hot carcass weight (HCW), cold carcass weight (CCW), dressing percent (DP), kidney and pelvic fat (KPF), longissimus muscle (LM) area, back fat (BF), and other carcass parameters were measured. Day 0 BW was used as a covariate for analyses. However, bucks were heavier than wethers at d 15 (p = 0.09), 42 (p = 0.001) and 56 (p = 0.001). Bucks had higher ADG (146 vs. 74 g/d; p = 0.001), HCW (21.2 vs. 18.8 kg; p = 0.06) and CCW (20.3 vs. 17.9 kg; p = 0.04) when compared with wether goats. Dressing percentage (51 vs. 47%; p = 0.06), KPF (0.44 vs. 0.16%; p = 0.02) and BF (0.41 vs. 0.21 cm; p = 0.05) were higher in wethers vs bucks, respectively; however, USDA live or carcass grades were similar. Longissimus muscle tissue from wethers and bucks were similar in darkness ($L^*$) and redness ($a^*$), but wethers had more (p = 0.02) yellow tint ($b^*$). Palmitic (C16:0), stearic (C18:0) and oleic (C18:1) acids were higher (p = 0.001) in muscle tissue from wethers compared to bucks. The saturated fatty acid (SFA) and monounsaturated fatty acid (MUFA) contents of muscle tissue were lower (p = 0.001) for bucks with no difference in polyunsaturated fatty acids (PUFA). Longissimus muscle initial temperature was higher in bucks (p<0.04) and pH change post-mortem was similar for bucks and wethers. These results indicated that castration of young market goats reduced growth performance and produced carcasses with more fat and higher SFA.

• Journal of Life Science
• /
• v.14 no.3
• /
• pp.525-530
• /
• 2004

This study has been performed to examine physico-chemical properties and composition of venison in Deer breeds. According the results, moisture content in the venison ranged between 74% and 75%, and there were no significant differences among the breeds, or among the cutting parts. Fat content in the meats was estimated as less than 1% except in loin, protein contents was estimated as more than 22%, and ash content was estimated as more than 1.5%. For the contents of inorganic material in the loin, Fe$^{3+}$ content was higher in Elk than in other breeds, the contents of $Cu^{2+}$, $Mn^{2+}$, $K^{+}$, $Mg^{2+}$ and $Ca^{2+}$were higher in Red deer than in others, and the contents of $Fe^{3+}$, $K^{+}$, and $P^{+}$ were higher in Sika deer than in others. For the contents of inorganic material in the leg, the contents of $Cu^{2+}$, $Zn^{2+}$, $K^{+}$, $Ca^{2+}$ and $Mg^{2+}$ were higher in Elk than in other breeds, the contents of $Fe^{3+}$ and$P^{+}$ were higher in Red deer than in others, and the contents of $Cu^{2+}$ and $Fe^{3+}$were higher in Sika deer than in others. Amino acid contents in the venison alanine, proline, glycine, lycine and histidine were highly contained. and the contents of asparagine, cysteine, isoleucine and threonine were low. For the differences of amino acid contents among the breeds, the level was the higher in Sika deer than those of others. For the fatty acid in loin, the contents of myristic acid, oleic acid and linolenic acid in Sika deer were higher than those of others, the contents of myristic acid, palmitoleic acid, oleic acid and arachidonic acid in Red deer were higher than those of others and in Elk, the contents of palmitic acid and stearic acid were higher than those of others. For the contents of unsaturated fatty acid and polyunsaturated fatty acids, the level was higher in Red deer than those of others. For the fatty acid in leg, the contents of oleic acid, linolenic acid, linolenic acid and arachidonine acid in Sika deer were higher than those of others, the contents of myristic acid, palmitic acid, palmitoleic acid and oleic acid in Red deer were higher than those of others and in Elk, the contents of stearic acid and linolenic acid were higher than those of others. For the contents of saturated fatty acid, the level was lowest in Sika deer. For the contents of unsaturated fatty acid and polyunsaturated fatty acids were respectively highest in Sika deer. Comparing the contents inorganic materials between loin and leg, the concentrations in leg were generally higher than that of loin.n.

• Korean Journal of Fisheries and Aquatic Sciences
• /
• v.39 no.5
• /
• pp.376-383
• /
• 2006

The chemical components, lipid class, and fatty acid composition of the viscera from male and female common squid, Todarodes pacificus, were examined to evaluate the possible utilization of the liver, reproductive organs, and gills. In male and female squid, the viscera comprise 21% and 27% of the body weight, respectively. The protein content of the viscera was slightly higher in females (17.7-19.5%) than in males (15.6-17.2%). This was especially marked in the female reproductive organs, while there was little difference in the gill. The liver contained the largest amounts of lipids (17.2-18.6%) and the levels were higher in males than in females (P<0.01). By contrast, the reproductive organs of females contained more lipids than did those of males (4.68% vs. 1.65%, p<0.01). The prominent non-polar lipid (NL) classes were triacylglycerol (51.9-55.4% of the NL content) and sterol ester (16.3-21.8%) in the liver, and free sterol (47.0-68.5%) and free fatty acids (31.5-41.2%) in the reproductive organs. However, there were no significant differences in the NL classes between sexes. The percentage of the most prominent phospholipid (PL) class, phosphatidylcholine (PC), was highest in the liver (78.1-79.6% of the PL content), and there was no significant difference between the sexes. By contrast, phosphatidylethanolamine (PE) was highest in the reproductive organs (33.4%), and was higher in males than in females (P<0.05). All the visceral organs contained 36.4-48.5% of n-3 polyunsaturated fatty acids (PUFA), such as docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA). The DHA level was highest in female reproductive organs (32.3%), while EPA was high in male reproductive organs. These results demonstrate that the viscera of male and female common squid are a good source of DHA and EPA.

• Journal of Nutrition and Health
• /
• v.25 no.5
• /
• pp.351-359
• /
• 1992

This study was conducted to compare the effects of perilla oil or corn oil on lipid peroxidation and eicosanoid productions which are associated with the promotion of carcinogenesis. in liver or blood in rats. Male Sprague-Dawley8 weaning rats were fed on semisynthetic diets containing 15%(w/w) beef fat(BF). corn oil(CO) or perilla oil(PO) Three weeks after the half of rats in each diet group were injected with a single dose of 50mg 2-acetylaminofluorene (AAF)/Kg BW hepatocarcinogen intraperitoneally 3 times at 2-day interval and all of the rats were sacrificed after 8 weeks from the first injection. The rats fed on different dietary fats without 2-AAF treatment had not different MDA produc-tion and conjugated diene content in liver microsome. CO+AAf group had significantly higher conjugated diene content than BF+AAF and PO+AAF groups. and lower glucose-6-phospha-tase activity than BF+AAF group But PO+AAF had similar conjugated diene content to BF+AAF group and significantly lower MDA production than BF+AAF and CO+AAF groups. The hepatic mocrosomal lipid peroxidation was slightly greater in CO group than in PO group though perilla oil(P/S=9.67) has much more polyunsaturated fatty acids than corn oil(P/S=2.92) PG E2 level in liver and TX B2 level in plasma were significantly higher in CO group than in BF and PO groups. TX B2 level was lowered in CO and BF groups by 2-AAF treatment. These results reach to the contclousion than the type of dietary fatty acid as well as the P/S ratio has effect on hepatic microsomal lipid peroxidation and eicosanoid production and perilla oil or linolenic acid(n3) might be less effective on lipid peroxidation or PG E2 and TX B2 mediated tumor promotion than corn oil or linoleic acid(n6).

• Nutrition Research and Practice
• /
• v.13 no.4
• /
• pp.286-294
• /
• 2019

BACKGROUND/OBJECTIVES: Docosahexaenoic acid (DHA), an n-3 long chain polyunsaturated fatty acid (LCPUFA), is acquired by dietary intake or the in vivo conversion of ${\alpha}$-linolenic acid. Many enzymes participating in LCPUFA synthesis are regulated by peroxisome proliferator-activated receptor alpha ($PPAR{\alpha}$). Therefore, it was hypothesized that the tissue accretion of endogenously synthesized DHA could be modified by $PPAR{\alpha}$. MATERIALS/METHODS: The tissue DHA concentrations and mRNA levels of genes participating in DHA biosynthesis were compared among $PPAR{\alpha}$ homozygous (KO), heterozygous (HZ), and wild type (WT) mice (Exp I), and between WT mice treated with clofibrate ($PPAR{\alpha}$ agonist) or those not treated (Exp II). In ExpII, the expression levels of the proteins associated with DHA function in the brain cortex and retina were also measured. An n3-PUFA depleted/replenished regimen was applied to mitigate the confounding effects of maternal DHA. RESULTS: $PPAR{\alpha}$ ablation reduced the hepatic Acox, Fads1, and Fads2 mRNA levels, as well as the DHA concentration in the liver, but not in the brain cortex. In contrast, $PPAR{\alpha}$ activation increased hepatic Acox, Fads1, Fads2, and Elovl5 mRNA levels, but reduced the DHA concentrations in the liver, retina, and phospholipid of brain cortex, and decreased mRNA and protein levels of the brain-derived neurotrophic factor in brain cortex. CONCLUSIONS: LCPUFA enzyme expression was altered by $PPAR{\alpha}$. Either $PPAR{\alpha}$ deficiency or activation-decreased tissue DHA concentration is a stimulus for further studies to determine the functional significance.

• Korean Journal of Food Science and Technology
• /
• v.43 no.3
• /
• pp.282-290
• /
• 2011

Two species of demersal fish, Liparis tessellates (cubed snailfish) and Hemitripterus villosus (shaggy sea raven), were investigated in relation to seasonal chemical composition. Total fat contents of the two fish were very low and were not appreciably different throughout the year, whereas their fatty acid compositions were significantly different depending on season. Noticeable changes in the moisture and protein contents in the two fishes were observed before and after spawning. Cubed snailfish showed relatively high amounts of total amino acids and free amino acids during summer months, whereas the levels of those in shaggy sea raven remained relatively unchanged throughout the year. Regardless of season, the major fatty acid of the two fishes was palmitic acid and most of polyunsaturated fatty acids (PUFAs) were n-3 PUFAs. Lead was over the legislative limit in some samples of the two fishes.

• Korean Journal of Fisheries and Aquatic Sciences
• /
• v.43 no.2
• /
• pp.109-116
• /
• 2010

This study investigated the effects of astaxanthin, which is used to improve the muscle color of fish, on the nutritional composition of rainbow trout (Oncorhynchus mykiss). The trout were fed extruded pellets containing astaxanthin (pigmented rainbow trout) or without astaxanthin (non-pigmented rainbow trout). No significant differences in the contents of crude protein and crude ash between the two muscles of the two groups were observed. However, the crude fat composition of the muscle of pigmented rainbow trout was about two times higher than that of control muscle. In the muscle of pigmented rainbow trout, the contents of docosahexaenoic acid (DHA, 22:6n-3) and eicosapentaenoic acid (EPA, 20:5n-3), which are functional polyunsaturated fatty acids, were 1.6 fold higher than in non-pigmented muscle. In addition, the contents of minerals such as Zn and Fe, vitamins (B group, C, and E), free amino acids, carotenoids and astaxanthin were increased in the muscle of rainbow trout fed pellets supplemented with astaxanthin. Specifically, the content of the bioactive compound astaxanthin, was increased six times in the pigmented muscle, as compared to the control muscle. The results suggest that a diet supplemented with astaxanthin improves the nutritional composition of rainbow trout muscle as well as improving the muscle color.

• Journal of Food Hygiene and Safety
• /
• v.4 no.2
• /
• pp.133-153
• /
• 1989

The present study was carried out to investigate the preventive effects of lamprey oil and corn oil on atherosclerotic rats induced by oral administration of cholesterol and vitamin $D_2$. The obtaind results were summarized as fellows; 1. The group, fed only the mixture of cholesterol and vitamin $D_2$ showed the significant increase of total lipid, total cholesterol phospholipid, LDL&HDL-cholesterol in the serum, triglyceride and cholesterol in the heart and the aorta, but the significant decrease of triglyceride in the liver, as comparing with normal control group (p<0.05). The aorta showed the severe damage of disorganization, calcification, necrosis and lipid deposition in the aortic wall. 2. The group, adminstered the mixture of cholesterol and vitamin $D_2$ and fed 15% lamprey oil diet, showed the significant decrease of total lipid, triglyceride, total cholesterol, phospholipid and LDL&VLDL-cholesterol in the serum, triglyceride and cholesterol in the heart and the aorta, but the significant increase of cholesterol in the liver, as comparing with atherogenic control group (p<0.05). The aorta showed slight calcification and no lipid deposition in the aortic wall as comparing with atherogenic control group. 3. The group, administerd the mixture of cholesterol and vitamin $D_2$ and fed 15% corn oil diet, showed the decrease of total lipid, triglyceride and VLDL-cholesterol in the serum, and triglyceride in the heart and the aorta, as comparing with atherogenic control group (p<0.05). The aorta showed calcification and no lipid deposition in the aortic wall. In reviewing above results it was concluded that lamprey oil and corn oil in polyunsaturated fatty acids had the preventive effect on atherosclerotic rats induced by cholesterol and vitamin $D_2$. And the effect of lamprey oil in n-3 polyunsaturated fatty acids was higher than that of corn oil rich in n-6 polyunsturated fatty acids.

• Journal of the Korean Society of Food Science and Nutrition
• /
• v.30 no.5
• /
• pp.787-795
• /
• 2001

For the developing natural fisheries flavoring substances using crustacea, the flavor constituents of enzyme hydrolysates from shore swimming crab (crab) and spotted shrimp (shrimp) were investigated. In taste-active compounds of both enzyme hydrolysates, total free amino acid contents of crab and shrimp enzyme hydrolysates were 5,226.7 mg% and 8,757.3 mg%, respectively. The major amino acids were taurine, glutamic acid, proline, asparagine, glycine, alanine, valine, leucine, lysine anserine and arginine. As for ATP related compounds, AMP was the principal component and small amounts of IMP was detected in both enzyme hydrolysates. In the quarternary ammonium bases, betaine was the principal component (593.8mg%), and contents of TMAO and betaine in both samples were 60.7 mg% and 850.0 mg%, 124.1 mg% and 755.9 mg%, respectively. The major components were Na, K, P and Cl in inorganic ions. The major fatty acids of both sample were 14 : 0, 16 : 0, 16 : 1n7, 18 : 1n9, 20 : 5n3 and 22 : 6n3, and composition ration of n3 polyunsaturated fatty acids of were 27.8% and 28.5%, respectively. Total 99~109 volatile compounds were detected as a cooked odor of crab and shrimp enzyme hydrolysates by SDE apparatus/gas chromatography/mass spectrometry. The volatile flavor compounds identified from cooked crab enzyme hydrolysate were composed of 6 acids, 10 alcohols, 7 aldehydes, 11 ketones, 1 ester, 5 phenols, 4 benzenes, 22 hydrocarbons, 1 furan, 21 nitrogen containing compounds and 11 micellaneous compounds. And the volatile flavor compounds indentified from cooked shrimp enzyme hydrolysate were composed of 13 acids, 10 alcohols, 6 aldehydes, 10 ketones, 3 esters, 2 phenols, 5 benzenes, 36 hydrocarbons, 1 furan, 14 nitrogen containing compounds and 8 micellaneous compounds.

• Food Science and Preservation
• /
• v.21 no.5
• /
• pp.702-709
• /
• 2014

This study was conducted to provide basic date on the proximate composition and amino acid, fatty acid, sugar, and mineral contents of commercial dried lavers cultivated in Korea (in Seocheon, Wando, Goheung and Busan). The moisture, crude ash, crude fat, crude protein, and carbohydrate content ranges of the dried lavers were 5.67~7.43%, 8.01~8.95%, 1.54~2.25%, 37.77~39.98%, and 43.83~46.24%, respectively. The total amino acid, free amino acid, and essential amino acid concentrations were highest (25,982.15 mg/100 g, 4,545.44 mg/100 g, and 9,048.28 mg/100 g) in the dried lavers cultivated from Wando. The compositions of the fatty acids in four dried lavers were 16.30~22.15% saturated fatty acids, 6.04~7.73% monounsaturated fatty acids, and 70.33~76.03% polyunsaturated fatty acids. The sugar contents per 100 g of dried lavers were 3,678.84~4,052.52 mg of galactose, 2,112.30~2,473.86 mg of fructose, 1,103.74~1,648.39 mg of mannose, 361.67~590.21 mg of glucose, 8.63~10.38 mg of ribose, and 21.43~48.32 mg of xylose. The mineral concentrations in the dried lavers cultivated from Wando and Busan were low (Cu < Mn < Zn < Fe < Ca < Mg < Na < K), as were those in the dried lavers cultivated from Seocheon and Goheung (Cu < Mn < Zn < Fe < Mg < Ca < Na < K).