Kim, Ju-Sang;Kim, Man-Chul;Harikrishnan, Ramasamy;Han, Yong-Jae;Heo, Moon-Soo
Korean Journal of Microbiology
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v.45
no.4
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pp.368-376
/
2009
A red pigment-producing bacterial strain was isolated from sediment sample of the East China Sea. The isolate was identified by analysis based on 16S rDNA sequence and morphological, physiological properties, biochemical characteristics and fatty acid composition. Phylogenetic analysis based on 16S rDNA sequence showed that isolate represent a phyletic lineage within the genus Zooshikella, and this strain was most closely related to Zooshikella ganghwensis KCTC $12044^T$ (AY130994) (99.79%). The strain was Gram-negative, aerobic and required NaCl at 0.5~8.0% for growth. The predominant cellular fatty acids were saturated and monounsaturated straight-chain fatty acids. Consequently, this strain was identified as a member of the genus Zooshikella and designated as Zooshikella sp. JE-34. The pigment showed characteristics similar to prodigiosin, a well-known red pigment previously detected in Serratia marcescens. The antimicrobial activity of Zooshikella sp. JE-34 bacterial pigment was tested against 18 microorganisms, which were fish and human pathogens. The Zooshikella sp. JE-34 red pigment showed high antimicrobial activity against Streptococcus iniae, S. parauberis, S. mutans, Staphylococcus aureus, and Propionibacterium acnes.
This study was conducted to investigate the proximate composition, meat color, Warner-Bratzler shear force (WBS), total collagen content (%), cooking loss (CL), fatty acid composition, amino acid composition, and mineral content of loin, strip loin, top round, and chuck tender Hanwoo beef and imported Australian beef. Protein content was significantly lower for strip loin and loin of Hanwoo QG $1^+$ and 1 beef when compared to that of Australian black Angus or cross beef (p < 0.05), whereas it was not significantly different for top round and chuck tender. Intramuscular fat content was higher for QG $1^+$ Hanwoo beef strip loin (15.48%) than that in Australian cross beef (8.83%) and it was also higher in loin for QG $1^+$ (17%) and 1 (15.52%) Hanwoo beef than that in Australian Angus beef (10.59%) and cross beef (9.21%) (p < 0.05). The CIE $L^*$ value was significantly higher for Australian cross beef strip loin than that of Hanwoo beef but the CIE $a^*$ value was not significantly different between the same cuts from different origins. However, CIE $b^*$ values were significantly higher for the Australian cross beef than those for four cuts of Hanwoo beef and Australian Angus beef (p < 0.05). No significant difference in WBS of loin, top round, or chuck tender was observed among the different beef sample origins except that strip loin had significant higher WBS for Australian cross beef (3.02 kg) but lower for Australian Angus beef (2.13 kg). Australian cross beef contained significantly higher palmitic acid, stearic acid, linolenic acid, but lower palmitoleic acid, oleic acid, eicosenoic acid content in strip loin, loin, and top round than those of QG $1^+$ and 1 Hanwoo beef (p < 0.05). QG $1^+$ Hanwoo beef had significant lower saturated fatty acid and higher monounsaturated fatty acid content than those in Australian cross beef (p < 0.05). Hanwoo $1^+$ beef had more glycine in top round and chuck tender, whereas Hanwoo QG 1 beef and Australian Angus beef had higher cysteine, methione, and glycine levels in strip loin and loin and valine and leucine in top round and chuck tender than the same cuts of Hanwoo $1^+$ beef (p < 0.05). No significant differences were observed for Ca, Fe, or Zn content among the different beef samples.
Hyun Kyoung Kim;Soon Cheol Kim;Hyeon Jin Kim;Yeong Mi Kim
The Journal of the Convergence on Culture Technology
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v.9
no.5
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pp.753-760
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2023
In this study, quality improvement of beef was attempted according to the low temperature treatment and aging period of grade 1 compared to grade 1++ beef. The fat content and shear force of beef grade 1++ were 13.03% and 114.26N, but beef grade 1 was 3.21% and 149.67N. Meanwhile, after low-temperature treatment of grade 1 beef at -26℃ for 12 hours and low-temperature aging at 0 ℃ for 14 days, the shear force was greatly reduced to 87.85N, improving overall preference, softness, dripping gravy, flavor, and chewing texture. The essential free amino acid content was as low as 22.17mg/100g in grade 1++ beef, but the contents were high at 41.31~45.11mg/100g in three samples of grade 1, and there was no change in content according to cold treatment conditions. As a specific component of beef, Taurine was 30.94~34.41mg/100g, and the difference in content was small according to beef grade, but Anserine and Creatine were low at 19.68mg/100g and 70.01mg/100g in beef grade 1++ and high at 26.38~31.23mg/100g and 154.09~167.26mg/10g in beef grade 1. The content ratio of oleic acid (c18:1)/stearic acid (c18:0) as an monounsaturated fatty acid/saturated fatty acid ratio was low at 5.29 for grade 1++ beef, but high at 6.13~6.78 for grade 1 beef. In addition, there was no trend in the content ratio of these fatty acids according to the low-temperature treatment conditions and aging period in beef grade 1. As a result of this study, it was possible to improve the quality of beef grade 1 by low-temperature treatment at -26 ℃ for 12 hours and then aging at 0 ℃ for 14 days.
Effects of quality, physicochemical properties and antioxidants in Camembert cheese added with red ginseng powder (RGP) were investigated. Cheese samples were prepared with 0.05%, 0.10%, 0.15% and 0.20% RGP. and then monitored during ripening at $14^{\circ}C$ for 28 d. The pH of the RGP amended treatment groups increased during the ripening period relative to the control (p<0.05). Moreover, the 1,2-Diphenyl-1-picrylhydrazyle (DPPH) was highest in the 0.15% RGP group from 21 d to 28 d. $ABTS^+$ radical scavenging activity was increased just like DPPH as the ripening period passed, 0.10% treatment was highest at from 7 d to 21 d. 0.15% RGP was contents of ginsenosides : 10,999.7 ppm. The Free fatty acids (FFA), controls with 0.15% treatment, while the total fat (TF) and monounsaturated fat (MuSF) were higher in the control than the 0.15% RGP group (p<0.05). The total free amino acid (FAA) was increased in the control, and 0.15% RGP, and control was highest at then 0.15% RGP. The samples had average contents of fat and protein were 29% and 18-20% respectively. Additionally, the $L^*$ value decreased, while the $a^*$ and $b^*$ values increased as the amount of RGP added increased. Sensory evaluation revealed that texture and total acceptability were higher in the control group at 12 d. Although the addition of RGP did not exert a better effect on the ripening of the camembert cheese, but the ripening grade was similar to that of the common camembert cheese, and the additional function of the cheese was reinforced. Functional cheese could be developed.
This study investigated the effect of enteral nutrition supplementation on glucose and lipid metabolism in non-insulin dependent diabetes mellitus(NIDDM) patients(n=29). Nutrition formula(400kcal/day) were supplied daily for eight weeks as a substitute for a snack or a meal. Subjects were divided into three groups based on changes of fasting blood glucose(FBG), glucose response area(GRA) on oral glucose tolerance test(OGTT), before and after intake of nutrition formula : group 1(the group of a decrease in FBG and GRA, n=20), group 2(the group of a decrease in FBG and an increase in GRA, n=4), and group 3(the group of an increase in FBF and GRA, n=5). Before nutrition supplementation, group 3 showed a longer tendency of DM duration and a lower tendency of insulin and C-peptide response are than those of group 1 and 2. At 8 weeks after nutrition supplementation, group 1 showed a significant increase in insulin and C-peptide response areas but group 2 and 3 showed no change in those areas. After nutrition supplementation, all three groups showed a tendency of decrease in glycated hemoglobin and no significant changes in the levels of serum triglycerides, HDL, LDL, total cholesterol, albumin, transferrin, creatinine, GOT and GPT. The results suggest that using an enteral nutrition formula in NIDDM patients is a good substitute for a meal or snack and could improve blood glucose control without any changes in lipid levels, and liver and kidney functions. The beneficial effect of nutrition supplementation on glycemic control resulted from components of nutrition formula had such as additional fiber and high monounsaturated fatty acid as the source of fat to be helpful 세 glycemic control in diabetics.
Proceedings of the Korean Society of Crop Science Conference
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2017.06a
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pp.255-255
/
2017
Sesame has been consumed for centuries as flavoring ingredient in eastern Asian countries, especially Korea. Sesame seeds have been used as health food for traditional medicine to prevent disease in Asian countries for several thousand years. Sesame seed has higher oil content (around 50%) than most of the known oilseeds. Sesame oil is rich in monounsaturated and polyunsaturated fatty acids. Extraction of sesame has developed significantly over the years. The mechanical method was an early means of separation which was physical pressure to squeeze the oil out. Nowadays, solvent extraction becomes the commonly used commercial technique to recover oil from oilseeds. In this study, we investigated extraction efficiency and quality of oil affected by cultivars and extraction methods of sesame seed. Different variables were investigated; roasting temperature ($170{\sim}220^{\circ}C$), extraction methods (solvent and physical pressure), forced ventilation system and cultivars. The Contents of B(a)P in sesame oil after roasting at $170{\sim}220^{\circ}C$ were 0.30~2.53 ppm. When we introduced forced ventilation system during roasting, B(a)P Contents were decreased up to 36%. The Oil extraction efficiency on sesame seed was statistically depending on the cultivars and extraction methods. The oil extraction yields of solvent and physical pressure extraction were 56.3% and 44.6%, respectively. Many of sesame cultivars and genetic resources are linolenic acid content of less than 0.5%. The results supported that we have developed a safe and high quality sesame oil processing methods for small and medium-sized companies.
Kang, Dong Hun;Chung, Ki Yong;Park, Bo Hye;Kim, Ui Hyung;Jang, Sun Sik;Smith, Zachary K.;Kim, Jongkyoo
Animal Bioscience
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v.35
no.10
/
pp.1545-1555
/
2022
Objective: Our study aimed to investigate the effects of a 2% increase in dietary total digestible nutrients (TDN) value during the growing (7 to 12 mo of age) and fattening (13 to 30 mo of age) period of Hanwoo steers. Methods: Two hundred and twenty Hanwoo steers were assigned to one of two treatments: i) a control group (basal TDN, BTDN, n = 111 steers, growing = 70.5%, early fattening = 71.0%, late fattening = 74.0%) or high TDN (HTDN, n = 109 steers, growing = 72.6%, early = 73.1%, late = 76.2%). Growth performance, carcass traits, blood parameters, and gene expression of longissimus dorsi (LD) (7, 18, and 30 mo) were quantified. Results: Steers on the BTDN diets had increased (p≤0.02) DMI throughout the feeding trial compared to HTDN, but gain did not differ appreciably. A greater proportion of cattle in HTDN received Korean quality grade 1 (82%) or greater compared to BTDN (77%), while HTDN had a greater yield grade (29%) than BTDN (20%). Redness (a*) of LD muscle was improved (p = 0.021) in steers fed HTDN. Feeding the HTDN diet did not alter blood parameters. Steers fed HTDN diet increased (p = 0.015) the proportion of stearic acid and tended to alter linoleic acid. Overall, saturated, unsaturated, monounsaturated, and polyunsaturated fatty acids of LD muscle were not impacted by the HTDN treatment. A treatment by age interaction was noted for mRNA expression of myosin heavy chain (MHC) IIA, IIX, and stearoyl CoA desaturase (SCD) (p≤0.026). No treatment effect was detected on gene expression from LD muscle biopsies at 7, 18, and 30 mo of age; however, an age effect was detected for all variables measured (p≤0.001). Conclusion: Our results indicated that feeding HTDN diet could improve overall quality grade while minimum effects were noted in gene expression, blood parameters, and growing performance. Cattle performance prediction in the feedlot is a critical decision-making tool for optimal planning of cattle fattening and these data provide both benchmark physiological parameters and growth performance measures for Hanwoo cattle feeding enterprises.
The changes in quality properties and nutritional components for two mugworts, namely, Artemisia capillaris Thumberg Artemisiae asiaticae Nakai fermented by Bacillus strains were characterized followed by rapid pattern analysis of volatile flavor compounds through the SAW-based electronic nose sensor in the GC system. After fermentation, the pH has remarkably decreased from 6.0~6.4 to 4.6~5.1 and there has been a slight change in the total soluble solids. The L (lightness) and b (yellowness) values in the Hunter's color system significantly decreased, whilst the a (redness) value increased via fermentation. The HPLC analysis demonstrated that the total amino acids increased in quantity and the essential amino acids were higher in the A. asiaticae Nakai than in the A. capillaris Thumberg, specially with high contents of glutamic and aspartic acid. After fermentation, the monounsaturated fatty acid increased in the A. asiaticae Nakai and the polyunsaturated fatty acids increased in the A. capillaris Thumberg. While the total polyphenol contents have not been affected by fermentation, the total sugar contents have dramatically decreased. Scopoletin, which is one of the most important index components in mugworts, was highly abundant in the A. capillaris Thumberg; however, it was not detected in the A. asiaticae Nakai. Small pieces of plant tissue in the surface microstructure were found in the fermented mugworts through the use of the scanning electron microscope (SEM). Volatile flavor compounds via electronic nose showed that the intensity of several peaks has increased and additional seven flavor peaks have been produced after fermentation. The VaporPrintTM images demonstrated a notable difference in flavors between the A. asiaticae Nakai and A. capillaris Thumberg, and the fermentation enabled the mugworts to produce subtle differences in flavor.
This study was carried out to compare the meat quality of beef from Hanwoo supplemented with dietary Rhus verniciflua Stokes (RVS) meal, silicate (Si), and chromium-methionine (Cr-Met) during refrigerated storage. The 26 mon-aged Hanwoo steers were fed basal diets containing 4% RVS, 4% RVS+400 ppm Cr-Met, 1.4% $SiO_2$, or 0.14% $SiO_2+400 ppm$ Cr-Met for 4 mon prior to slaughter. The M. longissimus from carcasses were then stored at $4{\pm}0.2^{\circ}C$ for 7 d. The crude fat content was higher in the Si and Si+Cr-Met groups (p<0.05). The water-holding capacity (WHC) and tenderness were highest in the Si+Cr-Met group (p<0.05). With regard to fatty acids, the polyunsaturated fatty acid (PUFA) content was lower in the Si and Si+Cr-Met groups (p<0.05), and the monounsaturated fatty acid (MUFA) content was lowest in the Si+Cr-Met group (p<0.05). The TBARS and MetMb contents were decreased in the Si, Si+Cr-Met, and RVS+Cr-Met groups. Regarding meat color during storage, the Si+Cr-Met group showed the highest L, a, b, C values and total color, and those of the Si and RVS+Cr-Met groups were higher than the RVS group (p<0.05). Consequently, beef from Si-fed Hanwoo had higher fat content, color and oxidation stability, and lower PUFA content than RVS-fed beef. And beef from Si+Cr-Met-fed Hanwoo had higher WHC, tenderness and color stability, and lower MUFA content than Si-fed beef.
Journal of the Korean Society of Food Science and Nutrition
/
v.37
no.9
/
pp.1154-1161
/
2008
The purpose of this study is to determine the possibility of using Sophorae fructus as natural health food source. To accomplish this purpose, the contents of general and antioxidative nutrients of Sophora fructus were measured. The contents of carbohydrate, crude protein, crude lipid and ash are 75.9%, 16.4%, 2.41%, and 5.2%, respectively, while the calories of Sophora fructus was 337.3 kcal. Total dietary fiber was 15.07% of total carbohydrates. The percentages of water soluble dietary fiber to insoluble dietary fiber were 1.09% and 10.36%, respectively. The protein was composed of a total of 18 different kinds of amino acids. The contents of essential and non-essential amino acids were 2,310.91 mg and 5,218.52 mg. The K was the largest mineral followed by Ca, P and Mg, which means Sophorae fructus is alkali material. The contents of saturated fatty acids, monounsaturated fatty acids and polyunsaturated fatty acids were 24.94%, 32.40%, and 32.86%, respectively. Therefore, the amount of the total unsaturated fatty acid was higher than that of any other plant. The content of vitamin C in Sophorae fructus was higher than that of any other plant, which suggests that it could increase blood elasticity. The content of rutin, which is responsible for capillary vessel permeability, was 1.78%. The contents of water soluble antioxidative materials in 1 mL of water-extracted Sophorae fructus were $4.95\;{\mu}g$ which is comparable to 1,560.96 mmol of vitamin C in antioxidant effect. The general nutrients and other antioxidatant bioactive materials in Sophorae fructus were also potential materials for good health food. It is expected that a follow up study on Sophorae fructus through developing processed food and evaluation of their functional properties would provide useful information as a source of medicinal foods.
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