• Title/Summary/Keyword: dried

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Physicochemical Characteristics of Cold-Air Dried Persimmons and Traditional Dried Persimmons (냉풍건조 곶감과 천일건조 곶감의 이화학적 품질특성)

  • Lee, Su-Won;Moon, Hye-Kyung;Lee, Won-Young;Kim, Jong-Kuk
    • Food Science and Preservation
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    • v.18 no.4
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    • pp.481-487
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    • 2011
  • This study was performed to investigate physicochemical properties of cold-air dried persimmon and traditional dried persimmons. Moisture contents and water activity were lower at cold-air dried persimmon than traditional persimmons. Crude protein and crude fat were not significant differences, Crude ash and N-free extracts of cold-air dried persimmon were, relatively, high as comparing to the traditional dried persimmons. Brix in cold-air dried persimmon was the highest. In the hunter's color values, L, a and b values of cold-air dried persimmon were lowed than traditional dried persimmons. There was not significant differences at the texture of semi-dried persimmons, but cold -air dried persimmon were relatively high than the traditional dried persimmons in hardness, gumminess, chewiness. Free sugars contents were only glucose and fructose in an sample. Free amino acids contents were seventeen sorts, glutamic acid and alanine were high in order of contents.

Sensory and Physical Characteristics of Bam-dduk Prepared with Different Ratio of the Ingredients (재료배합비를 달리한 밤떡의 관능적 및 물리적 특성)

  • 김지영;차경희;이효지
    • Korean journal of food and cookery science
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    • v.13 no.4
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    • pp.427-433
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    • 1997
  • Various Bam-dduk were prepared by using two kinds of chestnut flour (dried chestnut, boiled chestnut), 2 types of sugar (sugar and honey), and 3 levels of sugar (10, 20, 30 g), and they were evaluated for sensory quality, texture, moisture, and color. The addition of 10∼15% of dried chestnut flour to glutinous rice flour increased the graininess, moistness, chewiness, and sweetness of Bam-dduk, and the addition of 30∼40% boiled chestnut flour increased the graininess, moistness, and sweetness, depending up on the types and levels of sugar. The use of 10% dried chestnut flour and 30 $m\ell$ of honey gave the highest value of springiness in Bam-dduk. Gumminess, hardness and chewiness were the highest with 15% dried chestnut flour and 20 g sugar. Cohesiveness was the strongest at 30% boiled chestnut flour and 10 $m\ell$ honey. Adhesiveness was most proper when 30 g sugar was added to 10% dried chestnut flour. The use of boiled chestnut flour gave higher moisture content in Bam-dduk (32.2∼41.3%) than the use of dried chestnut flour (29.6∼34.2%). The values of 'L' (67.43) and 'b' (18.07) were most intensive in Bam-ddfik prepared with 15% dried chestnut and 20 g sugar, and the replacement of 20 g sugar with 30 $m\ell$ of honey gave the highest 'a' value, 2.33.

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A Study on the Influence of Drying Methods upon the Chemical Changes in Red Pepper (고추의 건조방법(乾燥方法)에 따른 성분(成分) 변화(變化)에 관(關)한 연구(硏究) - 제 1보 Carotenoid, Capsaicin, Vitamin C의 변화(變化) -)

  • Park, Choon-Ran
    • Journal of Nutrition and Health
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    • v.8 no.4
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    • pp.27-32
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    • 1975
  • This investigation was designed to determine the influence of drying methods on the chemical changes in red pepper. Three different drying methods were employed: 1) Sun-drying at $25{\sim}28^{\circ}C$ for 15 days, 2) Drying in oven at $60^{\circ}C$ for 49 hours, and 3) Drying in oven at $90^{\circ}C$ for 8 hours. Dried and ground peels were used for the analysis of carotenoid pigments, capsaicin, and vitamin C. The results were as follows; 1. The total carotenoid content of sun-dried sample was more significantly in creased about 4% than that of the fresh sample, but both samples dried in oven were decreased about 30%. Among carotenoid groups, diol-polyol group was chiefly increased, and both samples dried in oven were decreased in the same trend; $17{\sim}18%$ reduction was found in hydrocarbons and monols and $36{\sim}38%$ was in diol-polyols. 2. In Capsaicin content in red pepper, the sun-dried sample was increased about twice of that of the fresh sample and both samples dried in oven were also tended to increase. 3. High reduction of vitamin C content was found in each treatment; 76% for the sun-dried and 89% for the oven-dried samples, respectively.

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Growth Response and Uptake of Nitrogen and Phosphorus of Pinus thunbergii by Treatment of a Dried Swine Excrement (고형돈분 처리 시 해송 묘목의 생장반응 및 질소·인 흡수 효과)

  • Lee, Chang-Heon;Cho, Jae-Young
    • Journal of the Korean Society of Environmental Restoration Technology
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    • v.9 no.2
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    • pp.72-80
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    • 2006
  • This study was conducted to evaluate the influence of dried swine excrement on the germination of Pinus thunbergii seeds, the growth response of seedlings of Pinus thunbergii and the uptaken of nitrogen and phosphorous by seedlings of Pinus thunbergii. The germination rate of seeds of Pinus thunbergii tends to decrease according to the increasing of application amount of dried swine excrement and the application amounts of dried swine excrement which is more than 3%(w/w %) makes the rate of germination to much more decreased. Contents of nitrogen and phosphorus are much higher in a way that the dried swine excrement was treated in nursery soil. 179 days after seeds of Pinus thunbergii were sowed, nitrogen contents in soil was decreased more than 70% and phosphorus was decreased 20 to 45%. Growth response of Pinus thunbergii was much higher in treatment of dried swine excrement than in control. But growth response was not affected by increasing of application amounts of dried swine excrement. Growth response of Pinus thunbergii was the highest in 2%(w/w %) application but its growth response was decreased in treatment more than 3% (w/w %) of dried swine excrement.

Effect of Dried Powder and Juice of Aster Scaber on Lipid Metabolism and Antioxidative Capacity in Rats (참취의 건분 및 녹즙이 흰쥐의 지방대사와 항산화능에 미치는 영향)

  • 이혜진;한대석;김미경
    • Journal of Nutrition and Health
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    • v.34 no.4
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    • pp.375-383
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    • 2001
  • This study was performed to investigate the effects of dried powder and juice of Aster scaber on lipid metabolism and antioxidative capacity in rats. Twenty one male Sprague-Dawley rats weighing 170.9$\pm$15.1g were blocked into 3 groups according to body weight and raised for 4 weeks with diets containing 5%(w/w) dried powder and juice from the same amount of Aster scaber. Food intake, body weight gain, food efficiency ratio and organ weights were not different among all the experimental groups. On lipid metabolism, both dried powder and juice supplementation decreased plasma total lipid, triglyceride(TG), total cholesterol and liver cholesterol levels by increasing fecal lipid excretions. Plasma thiobarbituric acid reactive substance(TBARS) concentrations were significantly decreased in dried powder and juice groups, whereas liver TBARS concentrations were not affected by experimental diets. Red blood cell(RBC) superoxide dismutase(SOD) activities were significantly increased by dried powder and juice supplementation, while activities of other antioxidative enzymes in RBC and liver were decreased or showed no changes. In conclusion, both Aster scaber dried powder and juice had the effects on lowering lipid levels by increasing fecal lipid excretions, and inhibiting of plasma lipid peroxidation in animals and the effects of juice were higher than that of dried powder. (Korean J Nutrition 34(4) : 375-383, 2001)

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The Promise of Dried Fruits in Cancer Chemoprevention

  • Kundu, Joydeb Kumar;Chun, Kyung-Soo
    • Asian Pacific Journal of Cancer Prevention
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    • v.15 no.8
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    • pp.3343-3352
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    • 2014
  • Chemoprevention is an attempt to use nontoxic natural and synthetic substances or their mixtures to intervene the relatively early stages of carcinogenesis, before invasive characteristics are manifested. The consumption of fruits is well known to reduce the risk of human cancers. Although most fruits are available only on a seasonal basis, recent advances in food processing technologies have made it possible to extend the shelf life of fruits and fruit-products. Fruits can be preserved by applying different drying processes to reduce the moisture content. Different varieties of dried fruits are now sold in supermarkets, thereby making them readily accessible to consumers. Since oxidative stress and chronic inflammation play important roles in cancer development, dried fruits with antioxidative and anti-inflammatory properties hold promise for cancer chemoprevention. The antioxidant, anti-inflammatory and chemopreventive activities of dried fruits are largely attributed to their polyphenols and vitamins. Dried fruits contain adequate amounts of bioactive principles, such as anthocyanins, acetogenins, catechins, coumarins, phenolic acids, terpenes, xanthones, and others. Since numerous health beneficial phytochemicals in fruits are conserved even after processing, regular intake of dried fruits can help prevent cancer. This review addresses the chemopreventive potential of representative dried fruits and their active constituents.

Physiological Activities and Amino Acid Compositions of Korean Dried Laver Porphyra Products (국내산 마른 김(Porphyra)의 생리활성 및 아미노산 조성 비교)

  • Lee, Hak-Jyung;Choi, Jong-Il;Choi, Sung-Je
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.45 no.5
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    • pp.409-413
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    • 2012
  • The physiological activities and amino acid compositions of dried lavers of Porphyra from the Jangheung, Seochen and Haenam coasts were determined. The ethanol extract of the Haenam dried laver exhibited the greatest 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity (56.1%), ferric-reducing antioxidant potential (FRAP) value(86.5 mM) and total polyphenol content (3.51 ppm) of these dried laver products. In addition, there was a strong positive correlation between the antioxidative activity and total polyphenol content of the laver products, suggesting that polyphenol compounds contribute to the antioxidant capacity in the ethanol extract of dried laver. However, there was no difference among the extracts in terms of cell proliferation activity. Fourteen combined amino acids were identified in oligopeptides from the dried laver products. Of the three extracts, that of the Haenam dried laver contained the highest levels of both free and total amino acids including alanine, glutamic acid, taurine, phosphoserine, and aspartic acid.

Comparison of Equilibrium Moisture Contents for Conventional Kiln Dried- and High Temperature Dried Softwood Lumber by Moisture Content Determination (관행열기건조(慣行熱氣乾操)와 고온건조(高溫乾燥) 침엽수재(針葉樹材)의 함수율(含水率) 측정법(測定法)에 의한 평형함수율(平衡含水率) 비교(比較))

  • Jung, Hee-Suk;Smith, William B.
    • Journal of the Korean Wood Science and Technology
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    • v.22 no.4
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    • pp.37-42
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    • 1994
  • The adsorption of water vapor and equilibrium moisture content(EMC) of the specimens for four softwood species dried by conventional- and high temperature method and equilibrated to 15% of the target EMC condition at 25$^{\circ}C$ were determined by oven drying method and with moisture meters. The amount of adsorption for high temperature dried red pine was significantly higher than that of conventional kiln dried wood, while those of eastern white pine, eastern hemlock and Norway spruce were not significantly different between drying methods. EMCs of these four species determined by oven drying method and with capacitive admittance moisture meter were not significantly different between drying methods. EMC of high temperature dried red pine determined with resistance moisture meter was significantly higher than that of conventional kiln dried wood. But EMCs of other species did not show significant difference between drying methods. EMCs of conventional and high-temperature dried wood determined with electronic moisture meters, especially in the case of the capacitive-admittance moisture meter measurement, were lower than that determined by oven drying method.

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Development of manufacturing method for the honey coating semi-dried mulberry fruit using hot air dryer

  • Kim, Hyun-bok;Kwon, O-Chul;Ju, Wan-Taek;Kim, Yong-Soon;Sung, Gyoo Byung;Hong, Seong-jin;Kim, Dooho
    • International Journal of Industrial Entomology and Biomaterials
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    • v.37 no.2
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    • pp.63-68
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    • 2018
  • Semi-dried mulberry fruit can be distributed at room temperature and maintained its chewy texture and shape. It can be used for its own itself or food materials. We develop the honey coating semi-dried mulberry fruit manufacturing method through hot air dryer. After extracting the moisture from the thawing process, honey was coated and dried. Drying time for semidried mulberry fruit was shortened by manufacturing on the day of work without going through aging process. The first the mulberry fruit juice was separated from the frozen mulberry fruit at room temperature of the laboratory or in the dryer of $60{\sim}90^{\circ}C$, then the first dried by a hot air drier at $60^{\circ}C$ for 3 to 4 h. Next, it is coated with honey, which is equivalent to 20% weight of the first dried mulberry fruit, and then the second dried at a temperature of $38^{\circ}C$ for 20 ~ 30 h. The honey coating semi-dried mulberry fruit by above method was shiny on the surface and retained its shape. The moisture content was about 15% and it was confirmed that it could be stored at room temperature.

Dehydration of Opuntia ficus-indica and Aloe vera Slices Using Polyethylene Glycol and Comparison with Other Drying Methods (폴리에틸렌글리콜 처리에 의한 백년초, 알로에 절편의 탈수 및 건조와 기존 건조 방법과의 비교)

  • Yu, Dong-Jin;Wang, Suk-Mae;Song, Kyung-Bin
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.39 no.7
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    • pp.1024-1029
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    • 2010
  • Opuntia ficus-indica and Aloe vera slices were dried using 20, 30, and 40% polyethylene glycol (PEG) 4,000 as a dehydration agent, and the dried samples were compared with the hot-air dried and freeze dried in terms of rehydration ratio, color, and sensory evaluation. The moisture content of the PEG-treated samples decreased with increasing concentrations of polyethylene glycol. The rehydration ratio of the PEG-treated samples was better than those of the hot air-dried or freeze-dried samples. The color of the PEG-treated samples was similar to that of the freeze-dried samples and better than that of the hot air-dried samples. The sensory evaluation of PEG-treated samples was better than those of the hot air-dried or freeze-dried samples. These results suggest that dehydration of Opuntia ficus-indica and Aloe vera slices using PEG is very effective in terms of rehydration ratio and minimal damage of cell structure.