This study was performed to investigate the effect of drying temperature on the quality characteristics and antioxidant activity of blueberry. Blueberries were dried at different times and temperatures, including A ($40^{\circ}C$, 72 hr), B ($40^{\circ}C$, 48 h and $50^{\circ}C$, 24 hr), C ($50^{\circ}C$, 72 hr), and D ($60^{\circ}C$, 72 hr). The yield and pH ranges of blueberry were determined to be 17.73~31.17% and 3.20~3.25, respectively. The yield rate of A treatments, soluble solid of D treatments, was the highest. The yield rate and soluble content was the highest in the treatment of A and D, respectively. The moisture content and water activity were significantly decreased with the increase in drying temperature (p<0.05). The L value of A treatment, and a and b values of D treatment were the greatest. In the analysis of texture analyzer, hardness, springiness, cohesiveness, gummiess and chewiness were significantly increased with the increase in drying temperature (p<0.05). In the sensory evaluation of blueberry, the appearance and color were the highest in the A treatment. The moisture, texture and taste was highest in the B treatment. The overall acceptability was in the order of B > A > C >D. The total polyphenol content and DPPH radical-scavenging activity were 9.21~13.05 mg/GAEg and 61.90~81.42%, respectively, which were significantly decreased with the increase in drying temperature (p<0.05). Therefore, the optimum time and temperature for blueberry drying was founded to be B treatment ($40^{\circ}C$, 48 hr and $50^{\circ}C$, 24 hr) among other treatments.
Kim, Byung-Oh;Cha, Won-Seup;Ahn, Dong-Hyun;Cho, Young-Je
Food Science and Preservation
/
v.22
no.4
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pp.512-519
/
2015
In this study, the effects of gamma-radiation treatment on cell wall composition and physiological characteristics of astringent persimmon fruit were investigated. The soluble tannin contents of gamma-radiated samples were reduced by the radiation treatment. The hardness of the radiated fruit was decreased when compared to non-radiated fruit. Alcohol-insoluble component of the cell wall in the radiated fruit was decreased from 39.3 mg/g to 37.2 mg/g. The water-soluble content of the radiated fruit was increased from 11.4 mg/g to 13.9 mg/g. The cell wall content of the non-radiated fruit was 26.6 mg/g whereas the cell wall content of radiated fruit was decreased to 23.1 mg/g. Due to the maturation of astringent persimmon fruit by gamma-radiation, water-soluble compounds were increased whereas decreasing in cell wall compounds. The contents of lignin, pectin, and cell wall were decreased from 0.82 mg/g and 3.56 mg/g to 0.77 mg/g and 3.14 mg/g, respectively. Acid-soluble hemicellulose content was decreased by gamma-radiation, while alkali-soluble hemicellulose and cellulose contents were increased. Activities of sotening enzyme as polygalacturonase, pectinesterase and $\beta$-galactosidase existed in persimmon fruit were increased by gamma-radiation. In the sensory evaluation, gamma-radition treated persimmon showed very low astringent taste when compared to the non-radiated fruit. In hardness test, the non-radiated persimmon maintained the hardness while gamma-treated persimmon showed softened outer layer due to the condensation of tannin during radiation treatment. Therefore, gamma-radiation treatment will be used for the removal of its astringency of persimmon fruit and for enhancement of its maturation.
The qualities of the grape wines brewed with the varieties of Steuben, Muscat Bailey A, Merlot, Campbell Early and Alden were compared, and studied the mashing methods of the wine with a variety of Muscat Bailey A. and then investigated the aging effects of ultrasonic wave and the baking treatments on the new wines. The results obtained were as follows. 1. Extracts of the new wines brewed with the varieties of Steuben and Alden were 2.55 and 1.88 per cent respectively and the color densities of the wines with Merlot and Alden were 3.5 and 1.05 (optical density) respectively, and the other contents were not significantly different beween varieties. On the Otherhand, the results of sensory test showed that the order of favorite was the wines brewed with Steuben, Muscat Bailey A, Merlot, Campbell Early and Alden. 2. The effect of pasteurization ($55^{\circ}C$, 20 min.) on the inhibition of the growth of undesirable microorganism was appeared almost the same degree as the case of sulfiting (100 ppm), and the pasteurized must was more dense in color but slightly turbid than the case of sulfiting. 3. Glucose syrup was in adequate as a materials for supplemental sugar, and the quality of the new wine further fermented the free-run wine added the alcohol to be a constant alcohol content was almost the same as that of control. 4. Baking at $50^{\circ}C$. for 50 days to t he new wine from 0.45 to 0.65 per cent, and color density was also thicken from 2.8 to 3.17 (O. D). 5. Baking at $40^{\circ}C$. for 50days to the new wine brewed with Muscat Bailey A, increased the ester content of the wine from 0.37 to 0.65 per cent and color density was-also thicken from 3. to 4.2 (O.D). 6. Ultrasonic wave (150 watt, 20Kc) treatment for 10 hours to the new wine brewed with Muscat Bailey A, increased the ester content of the wine from 0.37 to 0.47 per cent.
Red pepper paste were prepared by using various raw materials such as rice, glutinous rice, polished barley, polished wheat and corn powder, and their chemical compositions including reducing sugar, amino-N and ethanol were analyzed during the period of aging in order to elucidate effects of these starchy materials on the compositions and qualities of the products. The results obtained are summarized as follows: 1) Koji of these materials were manufactured respectively by inoculating a strain of Asporyzae and their activities of protease and saccharifying amylase were determined. Wheat koji was found to have the highest level of protease activity among the koji, while glutinous rice koji had the strongest amylase activity. 2) Contents of moisture, crude protein, crude fat, and sodium chloride in the red pepper pastes were not changed significantly, however total sugar content was decreased during the period of aging. 3) After 60 days of aging, the highest amount (160mg%) amino nitrogen was detected in the red pepper paste of polished wheat, but higher levels of reducing sugar and ethanol contents were detected in that of glutinous rice. 4) Amino acids in the products were analyzed after 60 days of aging: a) Total 17 amino acids were detected. b) Free amino acid ratio to total amino acid content was approximately 35 percent in average. c) Free glutamic acid was higher than any other free amino acid In the amount and free ratio, but free methionine was lower. d) Lysine content was relatively high, while histidine and glycine were detected in trace. 5) Sensory tests including color, odor and taste on the products resulted in the highest mark for the red pepper paste of glutinous rice but in the lowest mark for that of corn powder.
Journal of the Korean Society of Food Science and Nutrition
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v.36
no.3
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pp.366-370
/
2007
Wild grapes contain various organic acids, vitamins, and inorganic salts compared to other various fruits. Their anthocyanin compounds are also known to have excellent effects in preventing cancers and heart diseases. Wild grapes are supposed to be a superior material for wine fermentation. This study was performed for searching optimum conditions for producing wild grape wines to improve their quality and taste. Four wild strains were isolated from Muscat Bailey A, ‘Kyoho’ grapevine, and wild grapes. For wild grape wine production, an optimum initial sugar concentration was $24^{\circ}Brix$ and an optimum temperature was $24^{\circ}C$. Sensory characteristics of the wild grape wine were evaluated for incense, sour taste, astringency, and sweet taste. Quality properties of the wild grape wine produced under the optimized fermentation conditions were analyzed. Total sugar, polyphenol contents, and acidity of the wild grape wine were 50.00 mg/mL, 25.30 mg/mL, and 0.95%, showing higher value than those of commercial grape wines. Amino acids, tannins, alcohol contents, and pH were 1.80 mg/mL, 1.88 mg/mL, 12%, and 3.59, respectively. The optimum fermentation conditions can be used to improve quality of the wild grape wine.
The purpose of this study was to investigate the physicochemical properties of modified green gochujang, produced by Chengyang pepper powder and roasted soy powder. The moisture content of control gochujang (CON) made by red pepper powder was 32.64% whereas the content of sample 1 gochujang (S1) made by Chengyang pepper powder was 26.50%. Crude fat content of CON was 1.81% while the content of S1~S4 was a range of 2.64~2.80%. Furthermore, crude protein content of CON was 5.58% while the content of S4 was the highest value of 9.01 % In crude ash cases, S1~S4 groups were also increased to a range of 10.32~10.37% when compared to 9.91% of CON. Color properties of modified gochujang made by Chengyang pepper powder were significantly decreased in values of redness and yellowness, compared to that of CON. In pH test, it showed that pH 6.15 of S4 was significantly increased, compared to ph 5.26 of CON (p < 0.001). Total acidity of all sample groups has significantly decreased according to increased roasted soy powder than that of CON (p < 0.001). In textural properties, hardness of gochujang was a range of 622.33~3670.70 and S2 showed the highest value among others. Meanwhile, S4 showed the highest value in the adhesiveness, and S2 showed the highest gumminess. According to these results, modified gochujang was increased in nutritive values such as protein, fat, and various minerals, even though it was decreased in color and water contents. Therefore, modified gochujang would have beneficial effects on health, but it could be needed to find out the optimizing condition through a sensory evaluation for developing a new sauce using Chengyang.
Journal of the Korean Society of Food Science and Nutrition
/
v.38
no.9
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pp.1195-1201
/
2009
Dietary effects of Agaricus bisporus powder (ABP) on the quality characteristic of eggs from hens (Hy-Line) were investigated. Experimental groups (100 hens/group) were divided into normal control group (Control), 0.3% ABP supplemented diet group (M-0.3) and 0.6% ABP supplemented diet group (M-0.6), then fed for 12 weeks. There were no significant differences in shell thickness, while Haugh unit in M-0.3 and M-0.6 groups were 18.3$\sim$27.6% higher than that of control groups. Color $L^*$ and $b^*$ values of egg albumen and yolk in the M-03 and M-0.6 groups were lower whereas $a^*$ values were higher than those of NC group. In the yolk of M-03 and M-0.6 groups compared with control groups, the levels of total phospholipids and HDL-cholesterol were 4.5$\sim$13.9% and 86.1$\sim$87.0% higher, respectively, while the levels of total cholesterol, triglyceride and LDL-cholesterol were 29.4$\sim$31.9%, 51.9$\sim$52.4% and 49.1$\sim$53.5% lower than those of control groups, respectively. There were no significant differences in fatty acids. In the result of sensory evaluation, gory odor of raw eggs in the M-03 and M-0.6 groups was slightly lower compared with control groups. These results suggest that the feed containing mushroom of Agaricus bisporus can be used to reduce the egg yolk cholesterol content and gory odor from raw egg, and also to increase the phospholipids as a functional feed. Further studies on the mechanism are required.
Jang, Min Sun;Lee, Jung-Soo;Chandra, Dulal;Choi, Jee Won;Lee, Jin-Su;Park, Me Hea;Choi, Hyun Jinn;Hong, Yuun Pyo;Kim, Ji Gang
KOREAN JOURNAL OF PACKAGING SCIENCE & TECHNOLOGY
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v.23
no.3
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pp.143-150
/
2017
Effects of packaging methods for maintaining the shelf-life and postharvest quality of Korean chive (Allium tuberosum Rotter) usually called buchu in Korea was studied during fall season. Buchu, which has high moisture content and active metabolism after harvest, is characterized by the greater changes in quality during storage and distribution. It is usually packaged in paper box during distribution in domestic channel in Korea where the marketability ends within few days of harvest. In order to maintain the commercial quality of buchu, we tried to use inner film with or without absorbent paper in commercial paper box packaging. The 'Greenbelt' cultivar of buchu was harvested in october and packaged in corrugated paper box (A), in corrugated paper box with micro-perforated high density polyethylene (HDPE) film as inner material (B), a layer of absorbent paper both at the bottom and top of buchu in corrugated paper box (C) and a combination of HDPE film as inner material along with a layer of absorbent paper both at the bottom and top of buchu in corrugated paper box (D), and stored at $5^{\circ}C$ for up to 21 days. Several quality parameters such as fresh weight loss, respiration rate, color, chlorophyll content and sensory qualities were monitored during storage. When buchu was packaged only in paper box, the appearance and quality deteriorated rapidly through decay development thereby sample became unmarketable within 12 days. On the other hand, buchu packaged with inner HDPE film maintained its quality, good visual appearance and exhibited a longer period of marketable life compared to the samples stored in other treatments. However, the use of absorbent paper did not have any significant effect in maintaining quality of buchu. The uses of inner HDPE film was effective in reducing weight loss that resulted better visual appearance of buchu. Results suggest that the use of inner HDPE film in bulk type corrugated paper box packaging and storing at $5^{\circ}C$ could be the optimum condition for commercial storage of buchu. Further investigation on other quality parameters and packaging methods would be useful in maintaining the quality aspects of buchu at postharvest stages.
Kim, Kyoung Mi;Kim, Yong Woo;Hong, In Gi;Park, Soo Nam
Applied Chemistry for Engineering
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v.29
no.1
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pp.81-96
/
2018
In this study, physicochemical properties of the natural jadeite powder were investigated and also the wash-off pack and liquid foundation containing the jadeite powder were prepared. In addition, each of these formulations was evaluated by various functional effects, sensory evaluation, stability and skin safety. In the wash-off pack, the far-infrared ray emissivity and radiation energy values increased as a function of the jadeite powder content. At a 3% jadeite powder content, the skin temperature increased by about $0.5^{\circ}C$ when the jadeite powder-containing formulation was applied to the skin. Besides, the chroma of the liquid foundation containing the jadeite powder more clearly expressed the original color of the skin. Moisture content measurements of the wash-off pack and liquid foundation containing the jadeite powder showed the highest moisture uptake of 5.0% and 63.0%, respectively. In sensorial test, the wash-off pack formulations containing the jadeite powder demonstrated improved affinities toward a skin, adherency, and moistness and combatted itching. The liquid foundation containing jadeite powder showed also improved affinities except for the coverage when compared to control formulations. Furthermore, the stability evaluation for 8 weeks revealed neither discoloration nor separation phenomenon for the formulations containing the jadeite powder. Moreover, the pH was found to be stable up to 8 weeks and the viscosity up to 4 weeks. Skin safety assessments showed that all formulations containing the jadeite powder were non-irritating. These results suggest that the jadeite powder as an inorganic pigment may serve as a new multi-functional cosmetic ingredient with stability and safety.
In order to investigate the effects of pickle carrier on physico-chemical characteristics of seasoning chicken products, chicken were cured in seasoning containing 100 ppm germanium water, green tea, water soluble mineral and mixtures(100 ppm germanium water+green tea+water soluble mineral) after addition of 0.1% concentration to the weight of chicken. The determination of pH, salt and sugar contents were carried out, according to curing time. The salt content showed 1.11 %, 1.21 % in cured at 24 hours in control of breast and leg, irrespective of chicken parts, in which showed 19.94 brix, 18.89 brix in sugar content, respectively. These results mean that breast and leg meat added with natural extracts and functional water showed higher sugar content than that of control, in which revealed shortening of curing time by increasing penetrating velocity of salt and sugar content. Thus, salt and sugar content tended to be increased as the curing time of pickle carrier were extended in seasoning chicken after dipping in pickle containing water soluble mineral ions for 6 hours. The seasoning chicken treated with natural extracts and functional water showed a lower than that of control in hardness, irrespective of chicken parts. Overall, the seasoning chicken treated with natural extracts and functional water showed a low TBARS value and Log CFU/g, in which revealed antioxidative and antimicrobial activity. The sensory evaluations of seasoning chicken added with natural extracts and functional water containing water-soluble mineral ions were not significantly different(P<0.05). The glutamic acid among free amino acid contents showed a high in seasoning chicken treated with green tea, compared to control. This amino acid played a important role in taste of seasoning meat. The doneness appearance in seasoning chicken added with natural extracts and functional water containing water-soluble mineral ions tended to not be different, compared to those of control. These results revealed that seasoning chicken added with natural extracts and functional water containing water-soluble mineral ions would be attractive in fast food market on the basis of improvement of tenderness, shortening of curing time and uniformity of roasting appearance in seasoning chicken.
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