• Title/Summary/Keyword: Hydrolyzed products

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Effects of enzymatically hydrolyzed fish by-products in diet of juvenile rainbow trout (Oncorhynchus mykiss)

  • Bae, Jinho;Azad, Abul Kalam;Won, Seonghun;Hamidoghli, Ali;Seong, Minji;Bai, Sungchul C.
    • Fisheries and Aquatic Sciences
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    • v.22 no.1
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    • pp.1.1-1.8
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    • 2019
  • Five experimental diets were formulated to evaluate the effects of dietary enzymatically hydrolyzed tuna by-product on growth, non-specific immune responses, and hematology of juvenile rainbow trout (Oncorhynchus mykiss). A basal diet with 50% of fishmeal was used as control (CON) and four other diets replaced 12.5% ($TBB_{12.5}$), 25% ($TBB_{25}$), 37.5% ($TBB_{37.5}$), and 50% ($TBB_{50}$) of fish meal in the CON diet. Juvenile rainbow trout ($4.87{\pm}0.05g$) were randomly distributed into 15 tanks (50 L) and fed 3-4% of wet body weight two times a day. At the end of 7 weeks of feeding trial, weight gain, specific growth rate, feed efficiency, and protein efficiency ratio of fish fed CON diet were significantly higher than those of fish fed $TB_{50}$ diet (P < 0.05). But there were no significant differences among fish fed CON, $TBB_{12.5}$, $TBB_{25}$, and $TBB_{37.5}$ diets (P > 0.05). There were no significant differences in GPT levels among fish fed CON, $TBB_{12.5}$, $TBB_{25}$, and $TBB_{37.5}$ diets. Also, there were no significant differences in lysozyme, superoxide dismutase, glucose, and total protein levels in all experimental diet (P > 0.05). The broken-line analysis indicated that the minimum dietary level of enzymatically hydrolyzed tuna by-product to replace fishmeal could be 29.7% in rainbow trout. These results indicated that the optimum level of dietary enzymatically hydrolyzed tuna by-product could replace greater than 29.7% but less than 37.5% of fishmeal in juvenile rainbow trout diet.

Effects of Divalent Cations on the Spicing of Phage T4 Thymidylate Synthase Intron RNA

  • Park, In-Kook;Sung, Jung-Suk;Shin, Sook
    • Animal cells and systems
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    • v.1 no.1
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    • pp.87-91
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    • 1997
  • Effects of divalent cations such as $Mg^{2+}$, $Mn^{2+}$, $Ca^{2+}$, and $Zn^2$ on splicing activity of phage T4 thymidylate synthase intron RNA have been investigated. At the concentration of 0.5 mM, $Mn^{2+}$ in the absence of $Mg^{2+}$, a very small amount of pre-RNA was cleaved into ligation products (El-E2) but no circular or linear intron was produced. As the concentration of $Mn^{2+}$ was increased from 1 to 5 mM the pre-RNA was completely hydrolyzed. In the presence of 5 mM $Mg^{2+}$, both the linear intron and circular intron were produced but no El-E2 ligation product was produced. At both 3 and 5 mM $Mn^{2+}$ the RNA was hydrolyzed completely as observed with no $Mg^2+$ being present. In the case of $Zn^{2+}$, even at 0.5 mM concentration, the pre-RNA was completely hydrolyzed. This observation suggested that $Zn^{2+}$ facilitates RNA hydrolysis more rapidly than $Mn^{2+}$ does. at 5mM $Ca^{2+}$, the RNA was not hydrolyzed and remained intact as a primary transcript.

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Anti-inflammatory Effects of Hydrogels Containing Piroxicam and Hydrolyzed Products of Scutellariae Radix on Collagen-induced Arthritis (콜라겐으로 유발된 관절염에 대한 피록시캄 및 황금 가수분해물 복합 히드로겔의 항염 효과)

  • Kim, Tae-Kyun;Ahn, Hyo-Cho;Yun, Mi-Young;Leem, Jae-Yoon;Chae, Byeong-Suk;Kim, Dae-Keun;Park, Byung-Hyun;Yang, Jae-Heon
    • YAKHAK HOEJI
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    • v.52 no.5
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    • pp.394-401
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    • 2008
  • In order to access the suppressive effects of piroxicam (PX) and hydrolyzed products of Scutellariae Radix (PSH) on arthritis, we investigated whether PSH gel could suppress the progression of collagen-induced arthritis. PX, one of nonsteroidal anti-inflammatory drugs has been used in the systemic and topical treatment in a variety of inflammatory conditions. Scutellariae Radix, one of the herbal medicines, was used for the purpose of anti-inflammatory and anti-bacterials. For the purpose of transdermal absorption of the hydrogel preparations, two classes of hydrogels (PX, PSH) were formulated with carbomer 940, diethylene glycol monoethyl ether, polyethylene glycol-8-glyceryl caprylate/caprate and triethanolamine. In carrageenan-induced edema in rat hind paws, inhibition of foot swelling was more increased in PSH than PX hydrogel. Rheumatoid factors including serum IgG, IgM and collagen specific antibody were present much lower in PSH gel treated mice than control. Histological examination revealed that PSH hydrogel inhibited infiltration of inflammatory cells into affected paw joint, compared with control. The PSH hydrogel would be a suitable preparation to increase transdermal treatment for anti-inflammatory effects on collagen-induced arthritis.

Studies on the Anti-inflammatory Activity of Aralia continentalis (II)

  • Han, Byung-Hoon;Park, Myung-Hwan;Han, Yong-Nam;Josefina B.Manalo
    • Archives of Pharmacal Research
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    • v.6 no.1
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    • pp.75-77
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    • 1983
  • Two phenolic acids were isolated from the hydrolyzed butanol fraction of Aralia continenetalis K. in crystalline form. They were identified by chemical tests and by analysis of spectra of UV, IR and NMR as ferulic acid and caffeic acid.

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Conversion of Ginsenoside Rd to Compound K by Crude Enzymes Extracted from Lactobacillus brevis LH8 (Lactobacillus brevis LH8이 생산하는 효소에 의한 Ginsenoside Rd의 Compound K로의 전환)

  • Quan, Lin-Hu;Liang, Zhiqi;Kim, Ho-Bin;Kim, Se-Hwa;Kim, Se-Young;Noh, Yeong-Deok;Yang, Deok-Chun
    • Journal of Ginseng Research
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    • v.32 no.3
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    • pp.226-231
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    • 2008
  • Ginsenosides have been regarded as the principal components responsible for the pharmacological and biological activities of ginseng. Absorption of major ginsenosides from the gastrointestinal tract is extremely low, when ginseng is orally administered. In order to improve absorption and its bioavailability, conversion of major ginsenosides into more active minor ginsenoside is very much required. Here, we isolated lactic acid bacterium (Lactobacillus brevis LH8) having ${\beta}-glucosidase$ activity from Kimchi. Bioconversion ginsenoside Rd by this bacterium in different temperatures was investigated. The maximum activities of crude enzymes precipitated by ethanol were shown in $30^{\circ}C$ and then gradually decreased. In order to compare the effect of pH, the crude enzymes of L. brevis LH8 were mixed in 20mM sodium phosphate buffer (pH 3.5 to pH 8.0) and reacted ginsenoside Rd. Ginsenoside Rd was almost hydrolyzed between pH 6.0 and pH 12.0, but not hydrolyzed under pH 5.0 and above pH 13.0. Ginsenoside Rd was hydrolyzed after 48 h incubation, whereas ginsenoside F2 appeared from 48 h to 72 h, and ginsenoside Rd was almost converted into compound K after 72 h.

Hydrolysis of Various Substrates by Two Forms of the Purified Glucoamylase from Rhizopus oryzae (Rhizopus oryzae로 부터 정제(精製)한 두가지형의 Glucoamylase의 각종기질(各種基質)의 가수분해(加水分解))

  • Hou, Won-Nyong;Chung, Man-Jae
    • Korean Journal of Food Science and Technology
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    • v.16 no.4
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    • pp.398-402
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    • 1984
  • These experiments were conducted to investigate the substrate specificity, the hydrolysis products on the various carbohydrates and the hydrolysis rate on the various raw starches of the two purified glucoamylase produced by Rhizopus oryzae. Both of the glucoamylases hydrolyzed amylose, amylopectin, glycogen, soluble starch, pullulan, maltose, maltotriose, maltotetraose, maltopentaose, maltohexaose, maltoheptaose and maltooctaose, but did not act on ${\alpha}-cyclodextrin$, ${\beta}-cyclodextrin$, raffinose, sucrose and lactose. When the reaction mixture of glucoamylase and polysaccharides were incubated $37^{\circ}C$for 32 hours, glucoamylase I hydrolyzed amylopectin, soluble starch and amyloses completely, but hydrolyzing glycogen up to only about 88%. Glucoamylase II hydrolyzed the previous four polysaccharides up to about 100%. Both of the glucoamylases produced only glucose for various substrates and did not have any ${\alpha}-glucosyl$ transferase activity. Both of the glucoamylases hydrolyzed raw glutinous rice starch almost complety, wheras they acted on raw potato starch, raw green banana starch, raw arrow root starch, raw corn starch, raw yam starch and raw high amylose corn starch weakly. Glucoamylase II hydrolyzed raw starches at the higher rate than glucoamylase I.

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Reaction Pattern of Bacillus cereus D-11 Chitosanase on Chitooligosaccharide Alcohols

  • Gao, Xing-Ai;Jung, Woo-Jin;Kuk, Ju-Hee;Park, Ro-Dong
    • Journal of Microbiology and Biotechnology
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    • v.19 no.4
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    • pp.358-361
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    • 2009
  • The purified endochitosanase(Mw 41 kDa) from bacterium Bacillus cereus D-11 hydrolyzed chitooligomers $(GlcN)_{5-7}$ into chitobiose, chitotriose, and chitotetraose as the final products. The minimal size of the oligosaccharides for enzymatic hydrolysis was a pentamer. To further investigate the cleavage pattern of this enzyme, chitooligosaccharide alcohols were prepared as substrates and the end products of hydrolysis were analyzed by TLC and HPLC. The chitosanase split $(GlcN)_4GlcNOH$ into $(GlcN)_3+(GlcN)_1GlcNOH$, and $(GlcN)_5GIcNOH$ into $(GlcN)_4+(GlcN)_1GlcNOH$ and $(GlcN)_3+(GlcN)_2GlcNOH$. The heptamer $(GlcN)_6GlcNOH$ was split into $(GlcN)_5$ [thereafter hydrolyzed again into $(GlcN_3+(GlcN)2]+(GlcN)_1GlcNOH$, $(GlcN)_4+(GlcN)_2GlcNOH$, and $(GlcN)_3+(GlcN)_3GlcNOH$, whereas $(GlcN)_{1-3}GlcNOH$ was not hydrolyzed. The monomers GlcN and GIcNOH were never detected from the enzyme reaction. These results suggest that D-11 chitosanase recognizes three glucosamine residues in the minus position and simultaneously two residues in the plus position from the cleavage point.

Xylanase Production from Bacillus safensis Isolate by Xylan or Xylan Hydrolyzed Products (Xylan과 Xylan 가수분해물에 의한 Bacillus safensis 분리균의 Xylanase 생산)

  • Jin, Hyun Kyung;Yoon, Ki-Hong
    • Microbiology and Biotechnology Letters
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    • v.44 no.3
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    • pp.324-332
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    • 2016
  • A bacterial strain capable of hydrolyzing xylan was isolated from fermented soybean paste obtained from a domestic Buddhist temple, using enrichment culture with rice straw as a carbon source. The isolate, named YB-1301, was identified as Bacillus safensis on the basis of its DNA gyrase subunit B gene (gyrB) sequence. The xylanase productivity of strain YB-1301 was drastically increased when it was grown in the presence of wheat bran or various xylans. In particular, the maximum xylanase productivity reached above 340 U/ml in the culture filtrate from LB broth supplemented with only birchwood xylan at shake-flask level. The xylanase production was significantly induced by xylans at the stationary growth phase in LB medium containing xylan, whereas only a small amount of xylanase was constitutively produced from cells grown in LB medium with no addition of xylan. Furthermore, xylanase biosynthesis was induced more rapidly by the enzymatically hydrolyzed products of xylan than by the non-hydrolyzed xylan. In addition, the xylanase in the culture filtrate of B. safensis YB-1301 was found to have optimal activity at 55℃ and pH 6.5–7.0.

Studies on the Exo-maltotetraohydrolase of Pseudomonas stutzeri IAM 12097 -Part III. Reaction products and hydrolysis rate on various carbohydrates of Exo-maltotetraohydrolase- (Pseudomonas stutzeri IAM 12097 의 Exo-maltotetraohydrolase에 관한 연구(硏究) -제3보(第三報). 각종기질(各種基質)에 대(對)한 Exo-maltotetraohydrolase의 분해산물(分解産物) 및 분해율(分解率)-)

  • Lee, Mi-Ja;Chung, Man-Jae
    • Applied Biological Chemistry
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    • v.28 no.1
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    • pp.1-7
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    • 1985
  • Exo-maltotetraohydrolase produced by Pseudomonas stutzeri IAM 12097 was characterized with respect to substrate specificity, the reaction products and hydolysis rate on various carbohydrates. Maltopentaose, maltoheptaose, soluble starch, amylose, amylopectin, oyster glycogen and gelatinized starch of corn, potato, glutinous rice, green banana and arrow root were hydolyzed by this enzyme, but ${\alpha},{\beta},{\gamma}-cyclodextin$, sucrose, raffinose, lactose, pullulan, maltose, maltotriose and maltotetraose were not hydrolyzed. Among oligosaccharides, maltohexaose was favorably hydrolyzed by this enzyme and the main reaction product of oligosaccharides and polysaccharides was maltotetraose. Addition of pullulanase to this enzyme increased the hydolysis rate on gelatinized starches. tut it did not on raw starches. Among various starches, corn starch was favorably hydrolyzed by this enzyme, whereas it acted on potato starch, arrow root starch and high amylose corn starch weakly.

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Analysis of 3-Monochloro-1,2-Propanediol (3-MCPD) in Soy Sauce Products in Korea (국내 시판 간장에서의 3-Monochloro-1,2-propanediol(3-MCPD) 분석 평가)

  • 송현수;이병무
    • Toxicological Research
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    • v.18 no.2
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    • pp.191-194
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    • 2002
  • 3-Monochloro-1,2-propanediol(3-MCPD) was analyzed in soy sauce products commercially available in Korea. A total of 24 samples were collected and 3-MCPD was determined by GC/MS. Sources of 24 samples were classified by manufacturing methods as naturally brewed(NB), acid hydrolyzed (AH) and mixed (M = NB + AH) soy sauces. 3-MCPD was not detected in NB soy sauce products (< 0.01 ppm, mg/kg) whereas AH and M soy sauce products showed a wide range of 3-MCPD contamination (0.0l ∼ 2.038 ppm). The contaminated levels of 3-MCPD in soy sauce products were higher than the permissible or tentative permissible level of 3-MCPD in both European Community (0.02 ppm) and Korea (0.3 ppm). These data suggest that 3-MCPD levels contaminated in soy sauce products in Korea were shown to be too high and should be reduced to as low a level technologically feasible to protect Korean from the exposure to toxic chemical, 3-MCPD.