• Title/Summary/Keyword: Xylose Absorption

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Effects of Feeding Xylose on the Growth of Broilers and Nutrient Digestibility as well as Absorption of Xylose in the Portal-drained Viscera

  • Peng, Y.L.;Guo, Y.M.;Yuan, J.M.
    • Asian-Australasian Journal of Animal Sciences
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    • v.17 no.8
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    • pp.1123-1130
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    • 2004
  • Two experiments were conducted to examine the effects of dietary inclusion of xylose on growth performance, nutrient digestibility and xylose absorption in the portal-drained viscera of broiler chicks. In Exp. 1, ninety male 14 day-old broilers were used to study the effects of different inclusion levels (0, 5, 10, 20 and 40%) of D-xylose in the semi-purified diets on the growth and nutrient digestibility of broilers. In Exp. 2, One hundred and eight male broilers, fed by precision feeding at 22 day-old, were used to investigate the absorption and transportation of dietary xylose in the portal-drained viscera of broiler. The results of Exp. 1 indicated that the growth of broilers was gradually decreased as the xylose level increased (p<0.01). With the xylose supplementation increased, the moisture in broiler excreta was gradually elevated (p<0.01), AME and the digestibilities of crude protein and ether extract were significantly reduced and the digestibilities of xylose and arabinose were also decreased (p<0.01). The results of Exp. 2 showed that the concentrations of ribose, xylose and galactose in serum were significantly influenced by different dietary levels of xylose (p<0.01), but there's no apparent difference among rhamnose, glucose and arabinose (p>0.05). The xylose concentration in serum was highest in Vena Cava, middle in Portal Vein and lowest in Ulnar Vein within 6 h after precision feeding. And then the xylose concentration in Portal Vein and Ulnar Vein were higher than that of Vena Cava. The concentration of ribose, xylose and galactose in serum were also significantly changed with time prolongation (p<0.01). The concentration of xylose in serum was highest in the 40% xylose treatment, middle in the 20% xylose group and lowest in the control group. The glycogen contents in liver and muscle were linearly decreased as the level of xylose increased (p<0.01). The higher the dietary level of xylose was, the lower digestibility of dietary xylose was (p<0.10). 40% xylose markedly decreased the digestibility of dietary glucose (p<0.01). In conclusion, high levels of xylose in the diets inhibited the growth and nutrient digestibility of broiler. The outputs of xylose from the hydrolyzation of wheat-based diet by xylanase should have no adverse effects on broiler performance.

Antioxidant Activity of Amino Acid-Xylose Browning Reaction Products 2. Isolation of Antioxigenic Substrates from Browning Reaction Products by TLC and Dialysis (Amino 산-Xylose 갈변반응 물질의 항산화성 2. TLC와 투석을 이용한 항산화성 갈변물질의 분리)

  • YOU Byeong-Jin;LEE Kang-HO;LEE Jong-Ho
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.19 no.3
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    • pp.212-218
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    • 1986
  • In order to isolate antioxigenic substrates, the browning reaction products of xylose and various amino acids were analysed by TLC and dialysis. Rf values of browning reaction products of xylose and hydrophobic amino acids separated on silica gel TLC plate were shown in the range of 0.38 to 0.56 and that of basic amino acids was around 0.2. Browning reaction products made from xylose and Trp were separated on TLC into four bands with Rf values of 0.25, 0.55, 0.81 and 0.91 respectively. Among these the bands with Rf values of 0.25 and 0.55 appeared having strong antioxidant activity. The band of Rf 0.55 which showed the highest activity was positive to Prochazka reagent and had an absorption maximum at 275 nm. In dialysis of the xylose-Trp browning reaction products, the undialysed fraction (inner solution) was repsponsible to the antioxidant activity, which was separated into two bands with Rf values of 0.25 and 0.55 on TLC. The inner fractions of the browning products of xylose and His or Arg were also apparent in antioxdant activity.

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Corticosterone Administration Alters Small Intestinal Morphology and Function of Broiler Chickens

  • Hu, Xiaofei;Guo, Yuming
    • Asian-Australasian Journal of Animal Sciences
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    • v.21 no.12
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    • pp.1773-1778
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    • 2008
  • Two experiments were carried out to study the effects of corticosterone (CORT) administration on intestinal morphology and function of broilers. In both experiments, birds were randomly divided into two equal groups. One group was the control group (CTRL), and the birds were fed with a basal diet. The other was the experimental group (CORT), and the birds were fed with the basal diet plus 30 mg of CORT/kg diet. At 21 days of age, performance, morphological characteristics of intestine, D-xylose level in plasma, activities of digestive enzymes in digesta, digestibility of nutrients and 5-bromo-2-deoxyuridine (BrdUrd)-labeling index of intestinal epithelial cells were determined. CORT administration decreased feed intake, daily gain and feed conversion ratio (p<0.05). CORT also decreased duodenal and jejunal villus height (p<0.05) as well as crypt depth (p<0.05). The D-xylose level in plasma of CORT-treated broilers was lower than that of the control (p<0.05). CORT treatment caused a decrease in apparent digestibility of protein (p<0.05), whereas fat and starch apparent digestibilities were unaffected (p>0.05). CORT administration increased activities of trypsin and amylase (p<0.05), and decreased BrdUrd-labeling index of duodenal and jejunal epithelial cells (p<0.05). In conclusion, CORT administration impaired the normal morphology and absorptive capacity of the small intestine of broiler chickens.

Physicochemical Characteristics of Soybean Seed Coat and Their Relationship to Seed Lustre (콩 종피의 이화학적 특성과 광택과의 관계)

  • Kim Sun-Lim;Chi Hee-Youn;Son Jong-Rok;Park Nam-Kyu;Ryu Su-Noh
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.50 no.spc1
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    • pp.123-131
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    • 2005
  • Lipid and protein contents in whole soybean seeds have negative correlation (r=-0.693**), however, these components in seed coat showed positive correlation (r=0.746**). Fatty acids in whole soybean seeds were higher in the order of $C_{18:2}>C_{18:1}>C_{16:0}>C_{18:3}>C_{18:0}$, while those of seed coat were higher in the order of $C_{18:3}>C_{18:2}>C_{18:0}>C_{16:0}>C_{18:1}$. The average content of total amino acid in twenty Korean soybean varieties was 38,938.7 mg/100 g, while that of seed coat was 4,418.4 mg/100g. Glutamic acid showed the highest composition rate $(16.4\%)$ in whole soybean seeds, while glycine was the highest in seed coat and their composition rate was $23.8\%$. The surface of shiny-lustre seed coats was smooth and their pore size was observed smaller than dull-lustre ones. Significant quadratic regression was observed among seed coat lightness, seed coat thickness, protein, lipid, unsaturated fatty acid and crude fiber. Fucose, rhamnose, glucose, mannose, galactose, arabinose and xylose were detected as a neutral mono-saccharides in the seed coats. The arabinose and xylose showed significant correlation with seed coat lightness. The unsaturated fatty acid was significantly correlated with seed coat lightness (r=0.726**). Water absorption rate was low in the thick seed coat varieties, but the rate was high in the shiny seed coat varieties. From the obtained results, it was considered that the thinner and brighter seed coat varieties were much favorable to increase the water absorption rate than thicker and darker seed coat ones.

Studies on the pathogenesis of group A avian rotavirus infection in turkeys (Group A 조류 로타 바이러스의 병원성에 관한 연구)

  • Kang, Shien-young;Nagaraja, Kakambi V.;Newman, John A.
    • Korean Journal of Veterinary Research
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    • v.33 no.2
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    • pp.217-225
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    • 1993
  • Commercial turkey poults not previously exposed to avian rotavirus were inoculated orally with the virus alone or in combination with E coki serotype 078 at 1, 7, 14 and 21 days of age. Turkey poults of 1, 7 and 14 days of age were susceptible to infection despite the presence of maternal antibodies against avian rotavirus in their serum. However, turkey poults at 21 days of age were less susceptible compared to those ages 1, 7 and 14 days. The clinical signs in poults of all ages were mild. Viral antigens were demonstrated in the mature villous epithelial cells of the duodenum, jejunum and ilem. Histopathological lesions were characterized by vacuolation of the epithelial cells and heterophil infiltration in infected turkey poults. A significant difference in D-xylose absorption was observed between control and rotavirus infected groups at 1 and 3 days post-infection in 14 days old turkey poults.

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Effects of Dietary Glutamine and Glutamate Supplementation on Small Intestinal Structure, Active Absorption and DNA, RNA Concentrations in Skeletal Muscle Tissue of Weaned Piglets during d 28 to 42 of Age

  • Liu, Tao;Peng, Jian;Xiong, Yuanzhu;Zhou, Shiqi;Cheng, Xuehui
    • Asian-Australasian Journal of Animal Sciences
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    • v.15 no.2
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    • pp.238-242
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    • 2002
  • Seventy-four piglets were used to investigate the effects of dietary glutamine (Gln) and glutamate (Glu) on the mucosal structure and active absorption of small intestinal, DNA and RNA concentrations of skeletal muscle tissue in piglets during d 28 to 42 of age. Postweaning piglets were fed for 14 d corn- and soybean meal-based diets supplemented with 0.0 or 1.0% L-Gln or L-Glu. On d 7 and 14 postweaning, pigs' small intestinal sections and longissimus dorsi were collected, at the same time, the D-xylose absorption test was conducted. The results suggested that in comparison to control piglets, jejunal atrophy during the first week postweaning was prevented by the glutamine and glutamate supplementation (1%) and the capability of small intestine to absorb Dxylose was improved. Furthermore the RNA concentration in skeletal muscle tissue was increased. These results provide an experimental basis for use of glutamine and glutamate on alleviating the weaning stresses and improving piglets' growth performance.

Effect of Glucose, Its Analogs and Some Amino Acids on Pre-steady State Kinetics of ATP Hydrolysis by PM-ATPase of Pathogenic Yeast (Candida albicans)

  • Bushra, Rashid;Nikhat, Manzoor;M., Amin;Luqman A., Khan
    • Animal cells and systems
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    • v.8 no.4
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    • pp.307-312
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    • 2004
  • Fast kinetics of transient pH changes and difference spectrum formation have been investigated following mixing of ADP/ATP with partially purified plasma membrane PM-ATPase of the pathogenic yeast Candida albicans in the presence of five nutrients: glucose, glutamic acid, proline, lysine, and arginine and two analogs of glucose: 2-deoxy D-glucose and xylose. Average $H^+$- absorption to release ratio, indicative of population of ATPase undergoing complete hydrolytic cycle, was found to be 0.27 for control. This ratio varied between 0.25 (proline) to 0.36 (arginine) for all other compounds tested, except for glucose. In the presence of glucose, $H^+$- absorption to release ratio was exceptionally high (0.92). While no UV difference spectrum was observed with ADP, mixing of ATP with ATPase led to a large conformational change. Exposure to different nutrients restricted the magnitude of the conformational change; the analogs of glucose were found to be ineffective. This suppression was maximal in the case of glucose (80%); with other nutrients, the magnitude of suppression ranged from 40-50%. Rate of $H^+$- absorption, which is indicative of E~P complex dissociation, showed positive correlation with suppression of conformational change only in the case of glucose and no other nutrient/analog. Mode of interaction of glucose with plasma membrane $H^+$-ATPase thus appears to be strikingly distinct compared to that of other nutrients/analogs tested. The results obtained lead us to propose a model for explaining glucose stimulation of plasma membrane $H^+$-ATPase activity.

A summary on the recent studies on the nature of deficiency of Pi (비허증(脾虛證)의 본질(本質)에 대(對)한 최근(最近) 연구(硏究) 개황(槪況))

  • Won, Jin-Hee;Mun, Gu
    • The Journal of Internal Korean Medicine
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    • v.13 no.1
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    • pp.135-142
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    • 1992
  • Pi(Spleen, 脾) corresponds to central earth and is called as the basis of acquired essence as it has the function of transforting and transforming the nutrients, keeping the blood circulating, and nourishing the muscle and limbs. Recently many studies to research the nature and deficiency of Pi are actively carried out. Especially functional deficiency of Pi(脾虛證) which occupies 60 to 70% or 88% in miscell aneous disease is divided into deficiency of Qi(脾氣虛), Yang(脾陽許), and Yin(脾陰虛), and tought to be positive when three or more such symptoms as anorexia, abdominal distension, loose bowels, pale face and weakness are present. Investigating the resent studies on the nature of the deficiency of Pi shows that Pi has the function of digestive system and also should be considered as functional unit of mult system related immune, metabolic, hematic, muscular, rnddocrine and nervus system. Various experiments as ptyaline activity test and xylose absorption test are used as an indication to deficiency of Pi and would be helpful to understand its nature. As deficiency of Pi appears in many disease and has various manifestations, further studies to diagnose the symptom of Pi using various experiments and oriental medical diagnostic method should be ensued.

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Chemical Analysis of Acidic Proteo-heteroglycans with Anti-complementary Activity from the Hot-Water Extract of Fomitella fraxinea (장수버섯 자실체로부터 분리한 항보체 활성 단백다당체의 화학적 분석)

  • Yoon, Sang-Hong
    • The Korean Journal of Mycology
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    • v.26 no.4 s.87
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    • pp.502-510
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    • 1998
  • The hot-water extract of fruiting bodies in Fomitella fraxinea had potent anti-complementary activities. After fractionation of water-soluble polysaccharides by DEAE-Sephadex A-25 column chromatography, major anti-complementary activity was concentrated into the FF-AP1 among three polysaccharides (FF-NP, FF-AP1, FF-AP2). FF-AP1 was fractionated into $FF-AP1{\alpha}$ and $FF-AP1{\beta}$ obtained from the adsorbed fraction and unadsorbed fraction by affinity chromatography using a ConA-sepharose 4B column, respectively. $FF-AP1{\beta}$, which exihibited the highest anti-complementary activities had an IR absorption peak of $890cm^{-1}$, and a M.W. of about 15,000 (gel filtration). Anti-complementary activity of FF-AP1 decreased greatly by pronase treatment and periodate oxidation. $FF-AP1{\beta}$ responsible for potent anti-complemenary activities of Fomitella fraxinea was an acidic protein-containing heteroglycan consisted of 48% glucose, 13% mannose, and 12% galactose as major component sugars, 9.6% protein, 6% uronic acids.

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High-yield Production of Functional Human Lactoferrin in Transgenic Cell Cultures of Siberian Ginseng(Acanthopanax senticosus)

  • Jo, Seung-Hyun;Kwon, Suk-Yoon;Park, Doo-Sang;Yang, Kyoung-Sil;Kim, Jae-Whune;Lee, Ki-Teak;Kwak, Sang-Soo;Lee, Haeng-Soon
    • Biotechnology and Bioprocess Engineering:BBE
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    • v.11 no.5
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    • pp.442-448
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    • 2006
  • Human lactoferrin (hLf) is an iron-binding glycoprotein that has been considered to play many biological roles in the human, including the stimulation of the immune system, antimicrobial and anti-inflammatory effects, and regulation of iron absorption. We generated transgenic Siberian ginseng (Acanthopanax senticosus) cell cultures producing a functional hLf protein using the signal peptide sequence from the endoplasmic reticulum and driven by an oxidative stress-inducible SWPA2 promoter which is highly expressed in plant cell cultures. The production of hLf increased proportionally to cell growth and showed a maximal level (up to 3.6% of total soluble protein) at the stationary phase in suspension cultures. Full-length hLf protein was identified by immunoblot analysis in transgenic cell cultures of Siberian ginseng. Recombinant hLf (rhLf) was purified from suspension cells of Siberian ginseng by ammonium sulfate precipitation, cation-exchange and gel filtration chromatography. N-terminal sequences of rhLf were identical to native hLf (nhLf). The overall monosaccharide composition of rhLf showed the presence of plant specific xylose while sialic acid is absent. Antibacterial activity of purified rhLf was higher than that of nhLf. Taken together, we anticipate that medicinal Siberian ginseng cultured cells, as demonstrated by this study, will be a biotechnologically useful source for commercial production of functional hLf not requiring further purification.