• Title/Summary/Keyword: sugar analysis

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Role of Osmotic and Salt Stress in the Expression of Erythrose Reductase in Candida magnoliae

  • Park, Eun-Hee;Lee, Ha-Yeon;Ryu, Yeon-Woo;Seo, Jin-Ho;Kim, Myoung-Dong
    • Journal of Microbiology and Biotechnology
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    • v.21 no.10
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    • pp.1064-1068
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    • 2011
  • The osmotolerant yeast, Candida magnoliae, which was isolated from honeycomb, produces erythritol from sugars such as fructose, glucose, and sucrose. Erythrose reductase in C. magnoliae (CmER) reduces erythrose to erythritol with concomitant oxidation of NAD(P)H. Sequence analysis of the 5'-flanking region of the CmER gene indicated that one putative stress response element (STRE, 5'-AGGGG-3'), found in Saccharomyces cerevisiae, exists 72 nucleotides upstream of the translation initiation codon. An enzyme activity assay and semiquantitative reverse transcription polymerase chain reaction revealed that the expression of CmER is upregulated under osmotic and salt stress conditions caused by a high concentration of sugar, KCl, and NaCl. However, CmER was not affected by osmotic and oxidative stress induced by sorbitol and $H_2O_2$, respectively. The basal transcript level of CmER in the presence of sucrose was higher than that in cells treated with fructose and glucose, indicating that the response of CmER to sugar stress is different from that of GRE3 in S. cerevisiae, which expresses aldose reductase in a sugarindependent manner. It was concluded that regulation of CmER differs from that of other aldose reductases in S. cerevisiae.

The Study of Utilty to 'Rolly Poly 160', Type II diabetes self-management Serious Game, Using Satisfaction Analysis (제2형 당뇨 식이 기능성 게임 '롤리폴리 160'의 효용성 및 만족도 조사 연구)

  • Ahn, Tae-Hong;Yu, Mi-Sun
    • Journal of Korea Game Society
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    • v.19 no.6
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    • pp.107-116
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    • 2019
  • A diabetes self-management serious game, 'Roly Poly 160' is developed for Type II diabetes patients to decrease their blood Sugar level. For verifying the effectiveness of 'Roly Poly 160', we examined the satisfaction survey. Data were collected from the diabetes patients and public those who have used 'Roly Poly 160' through D Community health center and S Community health center in Gwangju, from November, 27, 2018 to December, 4, 2018. 67 people returned the survey through the 'Roly Poly 160' APP. The overall average satisfaction level was 3.7 out of 5.

Leaf Exudates of Vicia faba and their Effects on Botrytis fabae and Some Associated Fungi

  • Migahed, Fatma F.;Nofel, Ashraf M.
    • Mycobiology
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    • v.29 no.4
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    • pp.198-204
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    • 2001
  • Analysis of leaf exudates of Vicia faba using paper chromatography to identify individual amino acids and sugars qualitatively was investigated. The results revealed that the number of identified amino acids detected in the leaf exudates of the susceptible plants was more than those of resistant plants. The results also showed an increase in the number of amino acids exuded by infected leaves, but no marked difference in sugars of infected and non infected plants. Lithium chloride application led to decrease in amino acid and sugar contents. The number of amino acids and sugars was also decreased with leaf age. Botrytis fabae and the selected fungal species(Alternaria alternata, Fusarium oxysporum and Aspergillus niger) were used to show the effect of individual amino acid and sugar on their spore germination. It was observed that all amino acids stimulated the fungal spore germination except serine which inhibited its spore germination. In case of A. alternata, spore germination was stimulated by all amino acids except serine, alanine, glutamic acid, arginine and methionine which caused the inhibition. In case of F. oxysporum, aspartic and glutamic acids inhibited spore germination but the other amino acids stimulated its spore germination. Aspartic acid and phenyl alanine inhibited the spore germination of A. niger. All the identified sugars(galactose, glucose, fructose and rhamnose) stimulated spore germination of all tested fungi.

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Effects of Organic Nutrients on Chitinase Production in Minimal Media (배양액중의 유기영양물이 Chitinase 생산에 미치는 영향)

  • Jang, Ji-Yun;Kim, In-Cheol;Jang, Hae-Chun
    • Microbiology and Biotechnology Letters
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    • v.32 no.4
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    • pp.366-370
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    • 2004
  • Four chitinase producing bacteria, Arthrobacter nicotinae CH4, Arthrobacter nicotinae CHI3, Arthrobacter sp. CH5 and Micrococcus sp. CH3, were isolated from small crabs and shrimps. We investigated the optimum medium condition for the production of enzyme and high cell mass. The preferable medium composition was as follows: colchitin 0.1 %(w/v), glycerol 0.25%(w/v) and yeast extract 0.05%(w/v) in minimal midium ($K_{2}HPO_{4}$ 0.7 g/l, $KH_{2}PO_{4}$ 0.3 g/l, $MgSO_{4}{\cdot}5H_{2}O$ 0.5 g/l, $FeSO_{4}}{\cdot}7H_{2}O$ 0.01 g/l, $ZnSO_{4}$ 0.001 g/l, $MnCI_2$ 0.001 g/l, pH 7.0). This cell culture medium could be used directly as sample for measuring chitinase activity. Because it hardly conreducing sugar such as glucose (blank value=0), the detected reducing sugar can be considered as a chitinase reaction product. The results can be used for easy preparation method for determination of enzyme activity and analysis of enzyme-substrate reaction in step of screening of chitinase producing bacteria.

Legal Aspects for Quality Evaluation Standard of Plant Variety and Seed (식물 품종 및 종자의 품질평가 기준에 대한 규정현황)

  • 최근진
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.47
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    • pp.200-215
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    • 2002
  • There are some international standards and organization controling the quality characteristics of varieties and seeds such as UPOV, OECD, ISTA, AOSA. The National List system to check variety performance such as quality characteristics of plant varieties and seeds was established by each countries. The UPOV (International Union for the Protection of New varieties of Plant) regulates the requirement of plant variety protection that is distinctness (D), uniformity (U), stability (S) (here in after called DUS), Novelty and Denomination, and some quality characteristics are used to examine the requirement of plant variety protection by each crops. OECD (Organization for Economic Cooperation Development) seed scheme regulates the seed certification for seed trade between countries. ISTA (International Seed Testing Association) and AOSA(Association for Official Seed Analyst) regulates the seed analysis standard and methods. Most of the countries in Europe has the National List system, which check the value for cultivation and use(VCU), that is to say, variety performance such as yield, quality and stress to environment. All the seeds should be enlisted in the National List before sell the seed in their country. All the quality characteristics checked variety performance are for instance, amylose and amylopectin content in rice, molting quality, $\beta$-glucan, protein in barley, protein and sugar content in soybean, sugar and amylopectin content in corn etc. Conditions for the protection of new variety of plant are DUS. Quality characteristics may be the important characteristics and used to check DUS in crop by crop. It is very important to develop a new characteristics and establish standard method fur examine the VCU and DUS test for each crop.

Isolation and Characterization of Intestinal Immune System Modulating and Anticancer Active Fractions from the Herbal Prescriptions

  • Hwang, Jong-Hyun;Jeong, Jae-Hyun;Yu, Kwang-Won
    • Food Science and Biotechnology
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    • v.18 no.2
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    • pp.323-329
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    • 2009
  • The prescriptions (DB-1-DB-5) were prepared with the active herbal medicines, Acanthopanax senticosus, Glycyrrhiza uralensis, Polygonatum odoratum, and Cichorium intybus. The most active crude polysaccharide fraction (DB-2-3), which was isolated through the fractionation of hot-water extract from DB-2, was significantly reduced by periodate oxidation (52.7 and 63.7%) on intestinal immune system modulating and anticancer activity. When DB-2-3 was further fractionated by column chromatographies, DB-2-3IIc-2 showed the most potent activities. In addition, DB-2-3IIc stimulated the proliferation of bone marrow cells via Peyer's patch in dose-dependent pattern by oral administration. The metastasis of colon 26-M3.1 lung carcinoma had significantly inhibited in mice fed DB-2-3IIc at 1 mg/mouse (43.8%). DB-2-3IIc-2 mainly contained uronic acid (46.1%) and 42.5% of neutral sugar with a small amount of protein (7.6%), and component sugar analysis also showed that DB-2-3IIc-2 was composed Ara, Gal, and GalA (molar ratio; 0.50:0.63:1.00). It may be suggested that activities of DB-2-3IIc-2 are resulted from pectic polysaccharides containing a polygalacturonan moiety with side chain of neutral sugars, such as Ara and Gal.

A Study on Sugars in Korean Sweet Rice Drink "Sikhye"(II) -Enzymatic Analysis of Isomaltooligosaccharides and Rice Residue- (식혜의 이소말토올리고당에 관한 연구(II) -효소적 분석-)

  • 안용근
    • The Korean Journal of Food And Nutrition
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    • v.10 no.1
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    • pp.87-91
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    • 1997
  • Isomaltooligosaccharides in Sikhye were digested with enzyme (30unit/ml) of $\alpha$-amylase, $\alpha$-glucosidase and glucoamylase from Aspergillus awamori, sweet potato $\beta$-amylase and human salivary $\alpha$-amylase at 37$^{\circ}C$ for 1 hour, respectively. These amylases acted on these saccharides to give hydrolysis products with less than 20% of degree of hydrolysis, except the case of glucoamylase with 62% of high degree of hydrolysis. $\alpha$-Glucosidase plus human salivary $\alpha$-amylase hydrolyzed it to attain the hydrolysis value up to 25%, but further increment of hydrolysis was not observed. Rice residue in Sikhye has similar sugar composition and structure, judging from sugar analyses by the enzymatic hydrolysis. These results suggest that isomaltooligosaccharides and rice residue in Sikhye can be a growth factor for Bifidobacterium and dietary fiber which is useful for human health.

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Effects of Dietary Fiber and Stevioside Mixture on Quality Attributes of Sausage and the Blood Properties of Rats

  • Kang, Jong-Ok;Hong, Sung-Moon
    • Food Science of Animal Resources
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    • v.32 no.2
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    • pp.142-148
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    • 2012
  • This study was conducted to examine the physiochemical characteristics (PC) of a sausage with added dietary fiber and stevioside mixture, as well as the blood properties (BP) of rats with feeding of the sausage. There were no significant differences between the control and the treatments in the PC; in case of treatments, as additive contents of dietary fiber (1-3%) and stevioside (0.05-1.5%), redness ($a^*$) gradually increased, but yellowness ($b^*$) rapidly decreased (p<0.05). The pH level and water holding capacity (WHC) also tended to decrease. Thiobarbituric acid reactive substances (TBARS) were of little change. However, the texture of sensory evaluation and the adhesiveness of texture analysis had significantly low values (p<0.05). BP, such as blood sugar, high density lipoprotein (HDL) cholesterol, low density lipoprotein (LDL) cholesterol and triglyceride (TG), did not increase and total cholesterol (TC) actually decreased (p>0.05). However, body weights of rats increased with treatments. Overall, it is suggested that adding dietary fiber and stevioside mixture to sausages can moderately improve the redness, and also reduce the levels of sugar, cholesterol and neutral lipids in the blood without noticeably affecting the WHC, oxidant stability, appearance, and taste.

The Development of a New Method to Detect the Adulteration of Commercial Aloe Gel Powders

  • Kim, Kyeong-Ho;Lee, Jin-Gyun;Kim, Do-Gyuun;Kim, Min-Ki;Park, Jeong-Hill;Shin, Yong-Geun;Lee, Seung-Ki;Jo, Tae-Hyung;Oh, Sun-Tack
    • Archives of Pharmacal Research
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    • v.21 no.5
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    • pp.514-520
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    • 1998
  • Simple and accurate methods to detect the adulteration of commercial aloe gel powder were developed. Crude polysaccharide in aloe gel powder was isolated by precipitating with excess ethyl alcohol and total hexose in isolated polysaccharide was determineded by dubois assay. After hydrolysis of non-dialysable polysaccharides, resultant free sugar was determined by gas chronmatography for sugar recogniton and ash contents was very low while the content of total hexose was very high. And polysaccharides of these products revealed typical dextran pattern, therefore, these products could be identified that adulterated with commercial maltodextrin. The content of maltodextrin in adulterated product was determined by HPLC and TLC analysis which could be adopted as a part of a certification process.

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Factors Influencing Self-Care Behaviors Related to Insulin Therapy in Elders with Diabetes Mellitus (노인 당뇨병환자의 인슐린요법 관련 자가간호행위에 대한 영향요인)

  • Sohn, Na-Yeong;Yang, Jin-Hyang
    • Journal of Korean Academy of Fundamentals of Nursing
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    • v.20 no.1
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    • pp.27-36
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    • 2013
  • Purpose: Self-care behavior is a key dimension of healthcare quality among elderlys with diabetes mellitus. The purpose of this study was to identify factors associated with self-care behaviors related to insulin therapy among elders with diabetes mellitus. Methods: The research was a cross-sectional, descriptive design using questionnaires. The participants were 147 older adult patients with diabetes mellitus receiving insulin therapy. Data were analyzed using descriptive statistics, t-test, ANOVA and multiple regression with SPSS statistics 19.0 program. Results: Participants' self-care behaviors related to insulin therapy were not adequate. Stepwise multiple regression analysis for self-care behaviors related to insulin therapy revealed that the most powerful predictor was self-efficacy. Self-efficacy, family support and frequency of blood sugar test explained 54.4% of the variance in self-care behaviors related to insulin therapy. Conclusion: The results indicate a need to promote self-efficacy, family support and frequency of blood sugar testing with these participants. In addition, strategies to improve self-care behaviors among elderly patients should be considered by health professionals, family members and the elderly patients themselves.