• Title/Summary/Keyword: Binding capacity

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Antimutagenic Effect of Insoluble Dietary Fibers from Some Green Yellow Vegatagles and Soybean by Binding the Carcinogens (녹황색채소류 및 대두에서 분리한 불용성 식이섬유의 항돌연변이 효과)

  • Lee, Seon-Mi;Rhee, Sook-Hee;Park, Kun-Young;Rh-ew, Tae-Hyong;Kim, Byeong-Gee;Chung, Hae-Young
    • Journal of Life Science
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    • v.5 no.1
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    • pp.26-32
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    • 1995
  • The antimutagenic effects of insoluble dietary fibers(IDF) extracted from some green-yellow vegetables(kale, carrot, spinach, broccoli and soybean sprout) and soybean by binding the carcinogens of MeIQ (2-amino-3,4- dimethyl-imidazo(4,5-f) quinoline) and Trp-P-2(3-amino-1-methyl-5H-pyrido[4,3-b] indole) in Salmonella tylhimirium TA100 and TA98 were studied. All of the insoluble dietary fiber samples which binded MeIQ exhibited high antimutagenic effects by removing the mutagen. Among the samples, IDFs from kale and soybean showed strong binding capacity fo the carcinogen and revealed about 90% of the antimutagenic activity. the IDF samples showed somewhat lower binding capacity to the Trp-p-2. The lignin which extracted from kale, soybean and carrot, and the cellulose strongly removed the mutagenicity of MeIQ by the binding. Among the samples, the level of lignin in kale revealed the highest(about 10%), and it seemed that the higher content of lignin in kale is one of the reasons to increase its antimutagenic effect.

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The Binding of Aflatoxin $B_1$ Modulates the Adhesion Properties of Lactobacillus casei KCTC 3260 to a HT29 Colon Cancer Cell Line

  • Hwang, Kwon-Tack;Lee, Won-Jae;Kim, Gye-Yeop;Lee, Shin-Kyung;Lee, Jeong-Min;Jun, Woo-Jin
    • Food Science and Biotechnology
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    • v.14 no.6
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    • pp.866-870
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    • 2005
  • The 14 lactic acid bacteria (LAB) have been evaluated to determine the binding capacity to HT29 cell and Aflatoxin $B_1$ ($AFB_1$). The interaction of LAB to HT29 cells has been further investigated to identify the possibility of competing the binding sites with $AFB_1$. Of 14 LAB strains, Lactobacillus casei KCTC 3260 demonstrated the higher adhesiveness to HT29 and $AFB_1$ with the rate of 19.6% and 46.3%, respectively. In competitive analysis for binding sites, the adhesion of L. casei KCTC 3260 to HT29 cells was reduced with 100 nmol $AFB_1$ by 31.2%. The protoplast of L. casei KCTC 3260 showed no binding capacity to HT29 cells with increment of $AFB_1$ concentration, indicating that cell wall components might serve as a critical factor for the binding. To discriminate the major component influencing on L. casei KCTC 3260 binding to HT29 cells and $AFB_1$, four different pre-treatments (lipase, pronase E, sodium m-periodate, and urea) were employed. Of those, sodium m-periodate treatment caused the lower adhesion of L. casei KCTC 3260 to HT29 cells with the increment of $AFB_1$ concentration. These results indicated that carbohydrate moiety on the cell wall of L. casei KCTC 3260 might be the most critical component in binding to both HT29 cells and $AFB_1$.

Effect Extraction Conditions on Bile acids Binding Capacity in vitro of Alginate Extracted from Sea Tangle (Laminaria spp.) (다시마 alginate와 bile acids의 결합능에 미치는 추출조건의 영향)

  • YOU Byeong-Jin;IM Yeong-Sun;JEONG In-Hak;LEE Kang-Ho
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.30 no.1
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    • pp.31-38
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    • 1997
  • Changes in bile acid binding rapacity in vitro and physical properties of alginate extracted from sea tangle (Laminaria spp.) and residue after extracting alginate (RAEA) were investigated. For the purpose, extraction conditions controlled under 1, 3 and $5\%$ of sodium carbonate solution, and 1, 3, 5 and 10 hours of extraction time at $60^{\circ}C$. The less sea tangle had particle size and the higher concentration of sodium carbonate solution increseded, the more yield of alginate gained. High concentration of sodium carbonate solution and long extraction time resulted in weakly binding capacity in vitro by alginate. Among four bile acids, binding capacites with alginate were in the order of cholic, taurocholic acid>glycocholic acid>deoxycholic acid. The binding capacity of RAEA was rated at almost same degree of alginate. For increasing the binding capacity of bile acids by alginate, it was subject to high viscosity and degree of polymerization.

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Isolation of a Calcium-binding Peptide from Chlorella Protein Hydrolysates

  • Jeon, So-Jeong;Lee, Ji-Hye;Song, Kyung-Bin
    • Preventive Nutrition and Food Science
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    • v.15 no.4
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    • pp.282-286
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    • 2010
  • To isolate a calcium-binding peptide from chlorella protein hydrolysates, chlorella protein was extracted and hydrolyzed using Flavourzyme, a commercial protease. The degree of hydrolysis and calcium-binding capacity were determined using trinitrobenzenesulfonic acid and orthophenanthroline methods, respectively. The enzymatic hydrolysis of chlorella protein for 6 hr was sufficient for the preparation of chlorella protein hydrolysates. The hydrolysates of chlorella protein were then ultra-filtered under 5 kDa as molecular weight. The membrane-filtered solution was fractionated using ion exchange, reverse phase, normal phase chromatography, and fast protein liquid chromatography to identify a calcium-binding peptide. The purified calcium-binding peptide had a calcium binding activity of 0.166 mM and was determined to be 700.48 Da as molecular weight, and partially identified as a peptide containing Asn-Ser-Gly-Cys based on liquid chromatography/electrospray ionization tandem mass spectrum.

A Study on Water Holding Capacity of Fish Meat Paste Products (어육(魚肉) 연제품(煉製品)의 보수력(保水力)에 관(關)한 연구(硏究))

  • Kim, Mu-Nam;Jo, Sang-Joon;Lee, Kang-Ho;Choi, Jin-Ho
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.7 no.1
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    • pp.43-52
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    • 1978
  • It is well known that water holding capacity plays an important role in processing such meat products as frankfurter-type sausage and fish meat paste products as kamaboko and fish sausage. Consumer qualities of meat products, such as appearance, flavor, as well as drip and shrinkage on cooking, depend greatly on the degree of water binding. In this paper, the water holding capacities of fish paste and salt added paste of white corvenia, Argyrosomus argentatus and file fish, Novodon modestus were measured by centrifuging and press method before and after cooking. And the effects of the addition of phosphates and starch to enhance water binding and stabilize gel formation were also discussed. In addition, the experimental conditions which are suitable to determine the water binding of fish meat paste product were suggested. The results were expressed in percent of water absorbed by the filter paper when pressed or released by pressor or centrifuge to the weight of sample. From the results. a proper condition to measure the water holding capacity of fish meat paste was that 3.0 g of sample which was previously added with 10 percent water was centrifuged at 13,400 G or 12,000 rpm for 15 minutes for the centriguging method and for press method, 0.3 g sample with 10 percent of water added was extracted by an oil pressor at $30\;kg/cm^2$ for 1 minute. Water holding capacity of fresh paste of white corvenia was relatively higher than that of file fish and the difference between species of fish was greater than the difference between measurments by two methods. Sodium chloride had a great effect on enhancing the water holding capacity of fish meat paste giving better effect when 3.0 percent of salt was added. Phosphates used except calcium phosphate revealed a certain enhancement in water binding, yielding best effect at 0.3 percent addition, and metaphosphate seemed to be more effective in order. The addition of corn starch, however, appeared to be not so effective for enhancement of water binding in fresh-salt-added fish meat paste but in cooked fish paste which might be attributed to absorption of water by starch grain and swelling during the heating and consequently enforced gel strength of cooked fish paste. And the water holding capacity of cooked fish paste was proportionally related to its gel strength.

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Chloride Binding Capacity of Fly Ash Cement Pastes. (플라이 애쉬 첨가 시멘트 페이스트외 염화물 고정화율)

  • 이순지;소형석;소승영;소양섭
    • Proceedings of the Korea Concrete Institute Conference
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    • 1995.04a
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    • pp.106-110
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    • 1995
  • Chloride ion is considered one of the most common culprits in the corrosion of steel in concrete. It breaks down the passive film and allows the steel to corrode actively at a high rate. The main objective of this study is to determine the critical chloride ion concentrations in the pore solutions and chloride binding effect of cement pastes made with and without fly ash. Cement pastes with water-ratio of 0.5 allowed to hydrate in sealed containers for 28 days and to express poresolution. T도 expressed pore fluids were analyzed for chloride and hydroxyl ion concentrations. It was found that the replaced cement with fly ash have little effect on Chloride binding capacity ratio.

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TREATMENT OF ZINC DEFICIENCY IN SHEEP BY ZINC CONTAINING BOLUSES

  • Khandaker, Z.H.;Telfer, S.B.
    • Asian-Australasian Journal of Animal Sciences
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    • v.3 no.1
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    • pp.53-59
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    • 1990
  • A study was conducted to investigate the release pattern of zinc form the zinc containing boluses and to see whether the released zinc can cure a zinc deficiency in sheep. Three sheep were used in this experiment and were fed a low zinc semi-synthetic diet throughout the experimental period. Each sheep was given a single pre-weighed zinc containing bolus when blood variables showed continuous zinc deficiency. The zinc containing boluses when placed within the reticulo-rumen of zinc deficient sheep, release zinc at the rate of 106.6 mg zinc/day for 39 days. At the end of depletion period there was a reduced feed consumption, plasma zinc concentration, plasma alkaline phosphatase activity and increased plasma zinc binding capacity which were 409 g, 0.18 mg/l, 87 U/l and 88.7% respectively and 521 g, 0.18 mg/l, 142 U/l, and 89.5% respectively before first and second blousing. After the administration of the first and second boluses, the feed consumption, plasma zinc levels and plasma alkaline phosphatase activities rose rapidly and far exceeded the starting values. The zinc binding capacity was reduced to 21.9% due to the administration of the first and second boluses. It is concluded that zinc boluses can be used for curing a zinc deficiency in sheep.

Effect of Addition of Potato peel , Guar gum , Polydextrose on Quality of Backsulgies (감자 껍질 , Guar gum 및 Polydextrose 첨가에 의한 백설기의 품질특성 변화)

  • Choi, Young-Seon;Kim, Young-A
    • Korean journal of food and cookery science
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    • v.8 no.3
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    • pp.333-341
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    • 1992
  • The physicochemical, rheological and sensory characteristics of 'BACKSULGIES', which was added with potato peel, guar gum or polydextrose, were investigated. The maximum acceptable addition ratio of dietary fiber to 'BACKSULGI' was 10%. And optimal addition ratio was 3% for all samples. The water binding capacity was affected by dietary fiber sources and incubation conditions (temperature and time). The Guar gum had me highest value of water binding capacity. The solubility was highly related with water binding capacity and me swelling power was increased with temperature increment. The degree of gelatinization was not significantly different with dietary fiber sources. But me values of gelatinization of 'BACKSULGIES' added with dietary fibers were significantly higher than mose of 'BACKSULGI' with no dietary fiber. Generally hardness and brittleness incresed along with storage time. But me hardness of 'BACKSULGIES' added with dietary fibers was significantly lower man those of 'BACKSULGI' with no dietary fiber. The retardation effect of dietary fibers for retrogradation of 'BACKSULGIES' was also proved by time constant determination of Avrami equation. Sernsory evaluation revealed that me addition of dietary fibers did not reduce the organoreptic quality. Therefore potato peel 3%, guar gum 3%, polydextrose 3% were optimum addition ratio which could be accepted as conventional 'BACKSULGI'. As me results of this study, it was proved mat the additions of dietary fibers to 'BACKSULGI' had the retardation effect of retrogradation.

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Effects of Brazilin on Glucose Metabolism in Primary Cultured Rat Hepatocytes

  • Moon, Chang-Kiu;Lee, Soo-Hwan;Chung, Jin-Ho;Kim, Seong-Gon;Chung, Mung-Kiu;Moon, Chang-Hyun
    • Archives of Pharmacal Research
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    • v.13 no.4
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    • pp.355-358
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    • 1990
  • In order to investigate the cellular mechanisms of hypoglycemic of brazilin, hepatocyte monolayer culture was introduced and, glycogen synthesis rate and insulin binding were measured as parameters. Glycogen synthesis and insulin sensitivity were remarkably augmented by the treatment of brazilin. Brazilin slightely increased insulin binding. Scatchard analysis revealed that this increase in insulin binding was not due to increase in the binding capacity but in binding affinity. These results suggest that the augmentation of hepatic glycogenesis and insulin sensitivity by brazilin may play an important role in the improvement of hyperglycemia.

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