• Journal of Animal Science and Technology
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• v.63 no.4
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• pp.892-903
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• 2021

The objective of this study is to investigate effect of air cleaner operated during pig breeding period on stress hormones of pigs and their pork quality. The stress hormones (cortisol, epinephrine and norepinephrine) in blood sample of pigs reared in the housing rooms with or without air cleaner have been measured according to a pig's rearing stage: 0 day (farrowing), 21st day (farrowing-weaning), 70th day (weaning-nursery), 140th day (nursery-growing), and 180th day (growing-fattening). The comparison of pork quality according to the application of an air cleaner was performed through the carcass analysis of the pigs shipped from swine house. The levels of cortisol, epinephrine, and norepinephrine in pigs reared in housing rooms with and without air cleaners were found to be within the range of normal reference values. Among pork quality evaluation items, the thickness of intermuscular fat and final carcass grade of pigs raised in housing room with air cleaner was generally superior to those of pigs raised in housing room without air cleaner (p < 0.05). Based on the results obtained from this study, it is concluded that air cleaner does not have a significant effect on reducing pig stress but contributes to improving pork quality in pig breeding.

• Food Science of Animal Resources
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• v.43 no.3
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• pp.412-427
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• 2023

The effects of wet-aging using a commercial refrigerator (CR, 4℃) and a pulsed electric field refrigerator (PEFR, 0℃ and -1℃) on the quality of sous vide pork loin were analyzed. The moisture and fat contents, pH, CIE L^*, CIE b^*, chroma, and shear force of the wet-aged samples were lower than those of the raw meat samples, whereas the water holding capacity (WHC) was higher. The PEFR group showed higher pH, CIE b^*, chroma, and WHC and lower weight loss than the CR samples. Electronic nose analysis indicated that positive flavor compounds were induced whereas negative flavor compounds were inhibited in the PEFR group. Wet-aging increased the sourness, saltiness, and umami of sous vide pork loin; the PEFR 0℃ samples showed the highest umami. Sensory evaluation indicated that wet-aging improved the color of sous vide pork loin. The PEFR 0℃ samples were rated higher than the raw meat and CR samples for all sensory traits. In conclusion, sous vide after wet-aging using a PEFR improved the quality of pork loin.

• Journal of the Korean Society of Food Science and Nutrition
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• v.26 no.6
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• pp.1109-1115
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• 1997

Hydrocarbons were analyzed in irradiated beef, pork, dried and seasoned beef, dried anchovy, dried squid, dried shrimp, and fish paste to determine whether the hydrocarbons can be used as markers for detecting post-irradiation of the imported meat and fish products. The samples were irradiated at 0.5, 1, 3, and 6 kGy. Fat was extracted with hexane, and hydrocarbons were separated from the fat through Florisil column. The hydrocarbons were analyzed with GC. Hydrocarbons 15:0, 16:1, 17:1, 16:2, 17:2, and 16:3 in beef and pork, 17:1, 16:2, and 17:2 in dried and seasoned beef, 16:2 in dried anchovy, 16:1 and 17:1 in dried squid, 16:1, 17:1, and 16:2 in dried shrimp, and 16:1, 16:2, and 16:3 in fish paste were detected in the irradiated samples, but not in the unirradiated, so that the hydrocarbons may be used as makers for detecting post-irradiation of each item.

• Journal of Life Science
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• v.17 no.7 s.87
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• pp.964-969
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• 2007

This study was carried out to investigate the effects of addition of pork fat, olive oil and soybean oil on the quality and sensory of ground pork meat. The samples consisted of the ground pork meat containing 20% pork fat (GP-P), 20% olive oil (GP-O), and 20% soybean oil (GP-S). The chemical composition, surface color, fatty acid composition, water hold-ing capacity, pH, VBN content and TBARS value were determined for the ground pork meat as the quality characteristics, and the sensory score were also evaluated. The moisture, crude protein, crude fat and crude ash content were not different among the GP-P, GP-O and GP-S. The $L^{*}$(lighaess), $a^{*}$(redness) and $b^{*}$(yellowness) of /GP-P were higher than those of the GP-O and GP-S (p<0.05). Palmitic acid was the most abundant among saturated fatty acids, and palmitic acid content of GP-P (24.384%)was higher than that of the GP-O (15.611%) and GP-5 (14.423%). In case of unsaturated fatty acids, oleic acid of GP-P (43.773%) and GP-O (65.040%) were the highest, linoleic. acid for GP-5 (40.762) was the highest. The water holding capacity of GP-P was higher than that of the GP-0 and GP-5, the pH of GP-S was higher than that of the GP-P and GP-O, and the VBN content and TBARS value of GP-P was higher than that of the GP-O and GP-5 (p<0.05). The raw color of GP-0 and GP-S were higher than that of the GP-P (p<0.05), however the raw aroma was not different among the samples. In case of roasted ground pork meat, the aroma was not different among the samples, the taste, texture and palatability or GP-S were the highest among the samples, and the juiciness of GP-O and GP-S were higher than that of the GP-P(p<0.05).

• Journal of Community Nutrition
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• v.4 no.1
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• pp.12-21
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• 2002

This study was conducted to investigate the dietary intake, anthropometric data, and association between two factors and main food sources contributing macronutrients for overweight and obese females. Subjects were 85 adult females (overweight : 28, obese 57) where mean age was 38.7y. The results are summarized as follows. Mean fat percent, BMI, obesity rate were 29.3, 23.9 and 15.1%, respectively for overweight women and 32.7, 28.3, 36.4%, respectively for obese women. There were significant differences for most of the anthropometric data between groups. Fat percent for all subjects was significantly correlated with weight, waist circumference, hip circumference, mid arm circumference or skinfold thickness for the triceps, subscapular and suprailiac (p < 0.001). The parameter which showed the highest correlation coefficient (r=0.6156) with fat Percentage was the waist to hip ratio. Any significant differences were not found in dietary intake of nutrients or in diet composition between groups. The mean energy intake was 2090.1kcal (104% of RDA) for overweight women and 2113.0kcal (106% of RDA) for obese women. PFC ratio for overweight was 17 : 24 : 59 and 18 : 23 : 58 for obese subjects, which can be regarded as higher fat and lower carbohydrate percentages compared to recommended PFC ratio (15 20 65) .4) Fat intake was positively correlated (r : 0.2301, p < 0.05) with the triceps skinfold thickness, protein intake was also positively correlated with waist circumference (r=0.2668, p < 0.05) or fat weight(r: 0.2406, p < 0.05) .5) The main food items that contributed to energy intake for overweight or obese subjects were similar (rice, pork, bread, grapes, barley) except com oil in overweight or instant noodle for obese group. The subjects in this study were taking less energy from rice and more energy from pork and bread than women from 98 National Health and Nutrition Survey. Because there were no significant differences of dietary data between overweight and obese group, further investigation considering basal metabolic rate or activity would be needed.

• Korean journal of food and cookery science
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• v.17 no.5
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• pp.490-496
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• 2001

The purpose of this study was to investigate the effects of ingredients(spices and medicinal plants) on the physicochemical properties of Pyunyuk a Korean style-cooked pork. Pyunyuk samples were prepared by the following 5 cooking conditions: Control(pork, water), A(pork, water, soy sauce), B(pork, water, soy sauce, onion, ginger), C(pork, water, soy sauce, onion, ginger, licorice, cinnamon) and D(pork, water, soy sauce, onion, ginger, licorice, cinnamon, clove and chestunt inner skin(CIS). The contents of ash, crude protein in loin and shank Pyunyuk were not significantly different among Pyunyuk samples, but crude fat content of C, D were significantly lower than control, A and B(p＜0.05). In Hunter’s color values of Pyunyuk, the lightness(L) was decreased by the addition of multiple ingredients, whereas the redness was increased. In mechanical characteristics, the hardness of control was the highest among the samples(p ＜0.05). In sensory evaluation, sample D obtained the highest score in flavor, taste, hardness, cohesiveness, springiness, gumminess and overall acceptability(p<0.05), and it was most preferred by the panels. There were higher negative-correlations between mechanical hardness and sensory characteristics of flavor, taste, cohesiveness, gumminess, brittleness and overall acceptability. From these results, it could be concluded that Pyunyuk ingredients(herbs and medicinal plants) reduce the content of crude fat, increase the tenderness and improve the flavor and taste of pork during cooking.

• Journal of agriculture & life science
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• v.46 no.2
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• pp.91-99
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• 2012

This study was carried out to compare the quality properties of pork loin from pigs fed different levels of pumpkin (Cucurbita spp.) powder. Twenty female pigs (Landrace${\times}$Yorkshire${\times}$Duroc) were fed either a control (commercial diet, based on corn and soybean meal) or the control diet supplemented with 2, 5 and 7% of pumpkin powder for 30 days. Dietary supplementation with pumpkin powder resulted in significantly higher moisture and fat contents in pork loin compared to the control (p<0.05). Dietary supplementation with pumpkin powder led to increased redness, pH and decreased shear force value and cholesterol levels in pork loin (p<0.05). In fatty acid composition, dietary supplementation with 2% or 5% pumpkin powder increased the palmitoleic acid (C16:1) in pork loin. These data suggest that supplementing pig diets with pumpkin powder can produce pork loin with low cholesterol levels and can enhance quality properties because pork loin fed a pumpkin powder-supplemented diet had better moisture, fat contents and tenderness.

• The Korean Journal of Food And Nutrition
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• v.29 no.5
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• pp.760-766
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• 2016

To increase the collagen recovery rate, bromelain (PB) and a microbial enzyme (PM) were used to treat to pork skin with single agent or combinations. The quality of collagen from the pork skin was evaluated by enzymatic treatments. The highest results for the solid contents and pork skin recovery rate obtained with the microbial-enzyme-bromelain mixtue (PMB) were 13.60% and 18.05% respectively. The result also showed that the color was affected by different types of enzyme treatments. Although PM treatment showed the highest result in the protein content of 251.30 mg/100 g, PMB treatment was the highest in the test of collagen content of 37.73 g/100 g among the treatments. However bands of the pork skin were detected widely at 130 kDa and 170 kDa ranges in SDS-PAGE. The band of PB treatment showed at the range of below 17 kDa, changed into a smaller molecular weight. The collagen content test of the pork skin by the treatments, collagen contents with combination treatment of pork skin with PMB (0.5%) resulted the highest in 43.76 g/100 g. Also the fat content at the above treatment was reduced to 11.12% compared to the other treatments. With these results of this experiment, we conclude that the enzymatic treatments were effective for the processing property of pork skin like enhancing the yield of collagen.

• Asian-Australasian Journal of Animal Sciences
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• v.32 no.1
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• pp.144-151
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• 2019

Objective: Curdlan has been widely used as a gelling agent in various food systems. This study was performed to evaluate the rheological properties of pork myofibrillar protein (MP) with different levels of curdlan (0.5% to 1.5%) and its application to low-fat model sausages (LFS). Methods: MP mixtures were prepared with 0.5%, 1.0%, and 1.5% of curdlan. Cooking loss (%), gel strength (gf), shear stress (Pa), and scanning electron microscopy were measured. Physicochemical and textural properties of LFS containing different levels of curdlan were measured. Results: The shear stress of MP mixtures increased with increasing levels of curdlan. MP gels with increased levels of curdlan decreased cooking loss and increased gel strength (p<0.05). The MPs with 1.0% and 1.5% of curdlan were observed more compact three-dimensional structure than those with 0.5% curdlan. Increased curdlan level in LFS affected redness ($a^{\star}$) and yellowness ($b^{\star}$) values. Although expressible moisture of LFS did not differ among curdlan levels, LFSs with various levels of curdlan decreased cooking loss as compared to control sausages. Hardness values (2,251 to 2,311 gf) of LFS with 0.5% and 1.0% curdlan was increased and differ from those (1,901 gf) of control sausages. Conclusion: The addition of 1.0% curdlan improved the functional and textural properties of LFS.

• Journal of the East Asian Society of Dietary Life
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• v.9 no.4
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• pp.489-500
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• 1999

The purpose of this study was to survey the recognition and the actual state of use of Native pork. The recognition on Native pork were examined using a questionary to eight hundred males and females in Kyeongbuk and Daegu. The results were as follows : The meats which they often ate in the order of pork, beef and chicken. When people eat out, 43.7% of those ate pork and 42.7% of those ate beef, the younger people liked pork more than the older people. The recognition on pork dishes showed the a high mean value of 3.38 to "I like Pork dishes" 53.5% of the respondants liked three-ply flesh and 33.6% of those liked rib among the part of pork. The favorite pork dish was pork roast meat at 48.1 o/e, Kimchichige at 13.6%, and sweet and sour pork 10.9%. Suitable and garnish food with pork were lettuce, sesame leaf and garlic, and alcoholic drinks such as soju. The Native pork showed a higher mean value than improved pork in taste(lightness, tasty) . sticky meat qualify, low fat content and good food for health. 30.9% of the respondants recognised as a traditional food. 59.1% of respondants have used the native pork, ingest place came out special eating house 42.2%. 38.3% of respondants suggested' convenience of purchase' and 31.6% of those suggested 'low price' as facts that has been improved in the native pork.tive pork.