This study was carried out to investigate the effect of grape peel on the physicochemical properties of ground pork stored at 4℃ for 10 d. Four types of ground pork were evaluated: T0 without grape peel, T1 with 0.3% grape peel, T2 with 0.7% grape peel, and T3 with 1.0% grape peel. The pH increased during storage, with that of T3 the lowest (p<0.05). The L-value and a-value decreased during storage, and the a-values of T2 and T3 were significantly higher than those of T0 and T1 (p<0.05). The b-values of T0 and T1 increased with a longer storage period (p<0.05), but those of T2 and T3 were not significantly changed. The TBARS (2-thiobarbituric acid reactive substances) content increased with a longer storage period, and the TBARS content of both T2 and T3 was significantly lower than that of T0 and T1 (p<0.05). DPPH (1,1-diphenyl-2-picrylhydrazyl) free radical scavenging activity declined with a longer storage period, and the activity of T2 and T3 was significantly higher than that of T0 and T1 (p<0.05). The VBN content of T0 and T1 also increased with a longer storage period (p<0.05), but the VBN content of T2 and T3 was not significantly changed. After storage for 4 d, the water-holding capacity declined and cooking loss and hardness increased (p<0.05), and these parameters were not significantly different among any samples. Chewiness increased with a longer storage period (p<0.05). The results suggest that the addition of grape peel to ground pork can enhance its functionality.
Jung, Ho-Kyung;Sim, Mi-Ok;Jang, Ji-Hun;Kim, Tae-Muk;An, Byeong-Kwan;Kim, Min-Suk;Jung, Won Seok
Korean Journal of Plant Resources
/
v.29
no.1
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pp.1-10
/
2016
Obesity is a pro-inflammatory state that contributes to the development of metabolic disorders such as hyperlipidemia, insulin resistance, type 2 diabetes, non-alcoholic fatty liver, and cardiovascular disease. In this study, we evaluated the inhibition of adipogenesis in 3T3-L1 cells and in high-fat diet (HFD)-induced obese mice by Peucedanum japonicum Thunberg L. water extract (PJT). Lipid accumulation measurement indicates that PJT markedly inhibited adipogenesis in a dose-dependent manner. RT-PCR results demonstrated that the mRNA expression of adipogenic transcription factors such as peroxisome proliferator-activated receptor-γ (PPARγ) and CCAAT/enhancer binding protein-α (C/EBPα) in 3T3-L1 cells were significantly down-regulated by PJT treatment. Oral administration of PJT (100, 300, and 500 ㎎/㎏, b.w/daily for 4 weeks) was conducted in high-fat diet induced obese mice and C57BL/6 mice. The PJT-administered group of HFD-induced mice had a lower body weight gain, along with decreased serum levels of glucose, triglycerides, and total cholesterol compared with the control mice, however, the HDL-cholesterol/total cholesterol ratio was increased. Furthermore, the elevated mRNA expression levels of adipogenesis related genes in the white adipose tissue of obese mice were significantly suppressed by PJT. These results indicate that PJT exhibits anti-obesity effects in obese mice by decreasing in serum lipid levels and lipogenesis related gene.
This study was conducted to prolong the edible period of Kimchi by adding chitosan (0.25, 0.5%) and sodium salts of various organic acids(0.01~0.04M citrate, malate, lactate) . The edible period was estimated by measuring changes in pH. titratable acidity(TA), PH/TA ratio, ascorbic acid content and pectin fraction during Kimchi fermentation at 2$0^{\circ}C$. The results were compared by estimating the maturity of Kimchi fermentation. Kimchi with the chitosan showed higher pH and titratable acidity throughout the fermentation period than that without chitosan. The pH decreased during the fermentation in the order of control, 0.25% chitosan, 0.5% chitosan, 0.5% chitosan+Na-citrate, 0.5% chitosan+Na-malate and 0.5% chitosan+Na-lactate. But the titratable acidity increased in the order of control, 0.5% chitosan+Na-malate, 0.25% chitosan. 0.5% chitosan+Na-citrate, 0.5% chitosan and 0.5% chitosan+Na-lactate. The PH/TA ratio decreased in the order of control, 0.25% chitosan, 0.5% chitosan+Na-malate, 0.5% chitosan, 0.5% chitosan+Na-citrate and 0.5% chitosan+Na-lactate. Ascorbic acid content in Kimchi was the highest at the 3rd day and then decreased during fermentation. Ascorbic acid content in Kimchi containing 0.5% chitosan and organic acid salts was higher than others. Alcohol insoluble solids( AIS ) in Kimchi decreased during fermentation in the order of control, 0.25% chitosan, 0.5% chitosan, 0.5% chitosan+Na-palate. 7.5% chitosan+Na-lactate and 0.5% chitosan+Na-citrate. During fermentation, hot water soluble pectin (HWSP) of control increased, whereas HCI soluble pectin (HCISP) decreased. By addition of chitosan, however, the results became reverse. Chitosan addition appeared to be effective in improving preservation quality of Kimchi during fermention. The edible period become extended by using chitosan plus organic acids instead of using chitosan only. Overall. addition of 0.5% chitosan+Na-lactate seemed most effective in prolonging the edible periods during Kimchi fermentation.
This study was performed to investigate the antioxidant effect of Sansa (Crataegi fructus) extract in vitro, and to evaluate the functional effects of Sansa powder addition on the quality properties and storage characteristics of Tteokgalbi. Total polyphenol and flavonoid contents of Sansa extract were found to be 127.00 mg/g and 54.05 mg/g, respectively. The DPPH radical scavenging activity of Sansa extract was high and it was similar to the BHA and BHT. The Tteokgalbi was prepared by 0% (N), 0.1% (S1), 1% (S2), and 2% (S3) of the Sansa Powder. Addition of Sansa powder decreased the protein and lipid contents, but the ash content was significantly increased (p<0.05). Increasing the amount of Sansa powder in the pork Tteokgalbi tended to increase the water holding capacity (WHC) values and the cooking loss (p<0.05). The addition of Sansa powder increased the hardness and chewiness values, but did not affect the cohesiveness and springiness values. In the sensory evaluation, the S3 Tteokgalbi had the best score in color. Values of pH, total microbial counts, thiobarbituric acid (TBA) and volatile basic nitrogen (VBN) values decreased significantly added Sansa powder relative to the normal (p<0.05). The S3 Tteokgalbi was significantly (p<0.05) more effective for delaying lipid peroxidation than the other groups. Sansa powder addition increased the L (lightness) and a (redness) values. Therefore, the results demonstrate that adding the Sansa powder to the pork Tteokgalbi tended to improve antioxidative and antimicrobial effects during the chilled storage period.
To evaluate antiinflammation of Aloe vera peel, antiimflammation substances were extracted from Aloe vera peel and identified, and we investigated the effect of the its substance the inhibitory effect on the activity of hyaluoronidase, elastase, collagenase and prostaglandin endoperoxide synthase. The water extract from Aloe vera peel were successfully purified with solvent fractionation, silica gel column chromatography, preparative thin layer chromatography and UV spectrometer. Two purified active substances were identified as aloe-emodin and barbaloin by Mass Spectrometer, $^1H-NMR$ and FT-IR. Aloe-emodin and barbaloin. $IC_{50}$ values of aloe-emodin and barbaloin against hyaluronidase activity were 40 and $70\;{\mu}g/mL$, respectively. Leuckocyte elastase, which is related to the destruction of various tissue, $IC_{50}$ values of them were 50 and $60\;{\mu}g/mL$, respectively. $IC_{50}$ values of aloe-emodin and barbaloin against collagenase activity were 40 and $60\;{\mu}g/mL$, respectively. and $IC_{50}$ values of aloe-emodin and barbaloin aganist the prostaglandin endoperoxide synthase, which play an important role in inflammatory reactions, were 40 and $70\;{\mu}g/mL$, respectively. Inhibitory effects of aloe-emodin, barbaloin and aspirin against carrageenan paw edema were 74.9, 52.9 and 51.9% as inhibiton percentage, respectively, at dose of 100 mg/kg and that of indomethancin was 49.7 at dose of 10 mg/kg. Cell cytotoxicity of barbaloin against human gingival cells was lower than that of aloe-emodin. Aloe-emodin and barbaloin did not show cytotoxicity against human gingival cells at concentration of 1.0 and $5.0\;{\mu}g/mL$, However, aloe-emodin and barbaloin showed less cytotoxicity than chlorhexidine, which usually have been used as the agent of anticaries and antiinflammation. These results suggested that aloe-emodin and barbaloin from Aloe vera peel have the effect of anticaries and antiinflammation.
Journal of the Korea Organic Resources Recycling Association
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v.9
no.3
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pp.55-69
/
2001
To study the possibility of agricultural utilization of seafood processing wastewater sludges, the changes of temperature and humus, the form of organic matter and nitrogen and the germination ratio of plant during the composting were investigated. The results were summarized as follows. Temperature was rapidly increased at early stage of composting, reached to $67{\sim}76^{\circ}C$ in highest temperature at 3~5 days, and then decreased gradually fallen to $40{\sim}50^{\circ}C$ at 19 days after composting, at the point was upset firstly. The third upset was conducted at 60days after composting, and then the temperature was little changed. The contents of total organic matters in the compost for composting were down 4.5~8.0%. Ether extractable materials, resins and hemicellulose contents of the organic matters for composting were decreased with 35~77%, 32~69% and 19~30%, respectively. And cellulose, lignins and unknown materials contents in the organic matters for composting were increased a little, but water soluble polysaccharides of organic matters were little changed. Total nitrogen, amino sugar and amino acid nitrogen contents in the compost for composting were decreased with 20~42%, 11~49% and 23~65%, respectively. The contents of humic acid in the compost for composting were little changed, but contents of fulvic acid in the compost for composting were decreased gradually. Germination ratio of radish, chinese cabbage and cucumber were over 90%, when the compost produced at 30 days after composting was tested on plant germination.
Five barley and two oat varieties grown in Korea were investigated for soluble, insoluble, and total $(1{\to}3)$, $(1{\to}4)-{\beta}-D-glucans$. Total and insoluble ${\beta}-glucans$ after extraction of soluble ${\beta}-glucans$ with water were analyzed, and the soluble ${\beta}-glucans$ were calculated as the difference between total and insoluble ${\beta}-glucans$. The total ${\beta}-glucans$ in whole barleys were in a range of $3.3{\sim}5.6%$(average 4.4%), and those in pearled barleys were In a range of $3.3{\sim}7.1%$(average 5.2%). In whole barleys, on average, 54% of the ${\beta}-glucans$ was soluble and in pearled barley 46%. Whole oats contained $3.1{\sim}4.0%$ total ${\beta}-glucans$, and dehulling increased the groat ${\beta}-glucans$ contents to $4.0{\sim}4.8%$. Oats demonstrated considerably higher ${\beta}-glucans$ solubility of 84% than barley. ${\beta}-Glucans$ in barley and oats were rapidly extracted at the beginning of the extraction and almost all of the ${\beta}-glucans$ were extracted after $2{\sim}3 hr extraction. As extraction temperature increased from $23^{\circ}C$ to $45^{\circ}C$, more soluble ${\beta}-glucans$ were extracted. However, solubility of barley ${\beta}-glucans$ decreased at a relatively high temperature of $65^{\circ}C$. Steam-cooking reduced the analytical solubility of barley and oat ${\beta}-glucans$, while roasting seemed to render the ${\beta}-glucans$ of barley more soluble.
Kim, Hey-Suk;Choi, Seung-Hee;Hwang, Min-Jung;Song, Woo-Young;Shin, Mi-Soo;Jang, Dong-Soon;Yun, Sang-June;Choi, Young-Chan;Lee, Gae-Goo
Journal of Korean Society of Environmental Engineers
/
v.32
no.2
/
pp.165-174
/
2010
The numerical modeling of a coal gasification reaction occurring in an entrained flow coal gasifier is presented in this study. The purposes of this study are to develop a reliable evaluation method of coal gasifier not only for the basic design but also further system operation optimization using a CFD(Computational Fluid Dynamics) method. The coal gasification reaction consists of a series of reaction processes such as water evaporation, coal devolatilization, heterogeneous char reactions, and coal-off gaseous reaction in two-phase, turbulent and radiation participating media. Both numerical and experimental studies are made for the 1.0 ton/day entrained flow coal gasifier installed in the Korea Institute of Energy Research (KIER). The comprehensive computer program in this study is made basically using commercial CFD program by implementing several subroutines necessary for gasification process, which include Eddy-Breakup model together with the harmonic mean approach for turbulent reaction. Further Lagrangian approach in particle trajectory is adopted with the consideration of turbulent effect caused by the non-linearity of drag force, etc. The program developed is successfully evaluated against experimental data such as profiles of temperature and gaseous species concentration together with the cold gas efficiency. Further intensive investigation has been made in terms of the size distribution of pulverized coal particle, the slurry concentration, and the design parameters of gasifier. These parameters considered in this study are compared and evaluated each other through the calculated syngas production rate and cold gas efficiency, appearing to directly affect gasification performance. Considering the complexity of entrained coal gasification, even if the results of this study looks physically reasonable and consistent in parametric study, more efforts of elaborating modeling together with the systematic evaluation against experimental data are necessary for the development of an reliable design tool using CFD method.
The reproductive cycle of the small filefish, Rudarius ercodes was investigated based on the annual variations of gonadosomatic index(GSI) and hepatosomatic index(HSI) by electronic and photic microscophy. The specimens used were collected at the coastal area of Benden island, Sizuokagen, Japan, from September 1982 to August 1983. GSI began to increase from March, starting season of longer daylength and higher water temperature, and reached the maximum value between June and August. It began to decrease from September with the lowest value appearing between November and February without any evident variation. The annual variations of HSI were not distinct in male filefish and were negatively related to GSI in female : HSI decreased in the summer season when the ovary was getting mature and reached the maximum in the winter season when the ovary was getting retrogressive. The ovary consisted of a pair of saccular structure with numerous ovarian sacs branched toward the median cavity. Oogonia divided and proliferated along the germinal epithelium of the ovarian sac. Young oocytes with basophile cytoplasm showed several scattering nucleoli along the nuclear membrane. when the oocytes growing to about 300 ${\mu}m$, nuclear membrane to disappear with nucleus migrating toward the animal pole. The regions of protoplasm were extremely confined within the animal hemisphere in which most of cytoplasms were filled with yolk materials and oil drops. After ovulation, residual follicles and growing oocytes remaining in the ovarian sacs degenerated. But perinucleatic young oocytes without follicles formed were not degenerated, and growing continuously still in the next year. Mitochondria and endoplasmic reticula in the cytoplasm remarkably increased with oocytes maturing and yolk accumulating. Those were considered to be functionally related to the yolk accumulation. Five or six layers of possible vitellogenin, oval-shaped disc structures with high electron density, appeared in the apex of follicular processes stretching to the microvilli pits of mature oocytes. Testis consisting of a pair of lobular structures in the right and left were united in the posterior seminal vesicle, Cortex of testis was composed of several seminiferous tubules, and medulla consisting of many sperm ducts connected with tubules. Steroid hormone-secreting cells with numerous endoplasmic reticula and large mitochondria of well developed cristae were recognized in the interstitial cells of the growing testis. Axial filament of spermatozoon invaginated deeply in the central cavity of the nucleus and the head formed U-shape with acrosome severely lacking, mitochondria formed large globular paranuclei at the posterior head, and microtubular axoneme of the tail represented 9+9+2 type. The annual reproductive cycles could be divided into five successive stages : growth(March to July), maturation(May to September), Spawning(mid May to early October) and resting stages(October to February). The spawning peak occurred from June to August.
Kim, Seon-Jae;Rhim, Jong-Whan;Lee, Lan-Sook;Lee, Joon-Seol
Korean Journal of Food Science and Technology
/
v.28
no.2
/
pp.345-351
/
1996
Studies on extraction and color characteristics of purple sweet potato (PSP) pigment were performed to provide the basic information for the utilization of PSP as a new source of natural food colorant. PSP pigment was extracted well with the polar solvents such as distilled water, ethanol, and methanol. but hardly extracted with the non-polar solvents. Among the tested solvents, 20% ethanol solution containing 0.1% citric acid was found to be the most efficient for extraction of the pigment from PSP. PSP contained high amount of pigment not only in the epidermis but also in the flesh of the potato. The PSP pigment was heat stable even under pretreatments such as autoclaving and blanching of the potato before extraction. The optimum temperature of the extraction for the PSP Pigment was decided to be $30^{\circ}C$ by considering the stability and the rate of extraction. The pigment was markedly influenced by the change of pH. The color of the pigment solution was red at the pH range of $1.0{\sim}3.0$, became blue at $7.0{\sim}8.0$, then turned green at $9.0{\sim}10.0$. A characteristic batho-chromic shift of the pigment solution was observed as the pH of the solution increased.
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