• Title, Summary, Keyword: FIA

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On-line Monitoring of Glucose and Starch by a Flow Injection Analysis Technique (흐름주입분석 기술에 의한 글루코우스와 전분의 온라인 모니터링)

  • 김준홍;박돈희;이종일
    • KSBB Journal
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    • v.16 no.5
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    • pp.459-465
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    • 2001
  • The on-line monitoring technique for the concentrations fo glucose and starch by FIA(Flow Injection Analysis)system was studied. Glucose oxidase(GOD) and amyloglucosidase(AMG) were immboilized on VA-Fpoxy carrier and integrated into the FLA system. The pH, buffer flow rate and temperature were optimized and the effects of salts and metabolites dissolved in the sample on the activity of immobilized enzyme were investigated. GOD-FIA and AMG/GOD-FIA were applied for the on-line monitoring of the glucose and starch in a simulated bioprocess. The on-line measurements of glucose concentrations by GOD-FIA agreed with off-line data well and the AMG/GOD-FIA with single cartidge system took and advantage over the FIA system with two separated cartridges for the on-line monitoring of starch concentrations.

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On-line Monitoring of Glucose and Acetate by Flow-Injection Analysis in Escherichia coli Fermentation Process (대장균 발효공정에서 흐름주입분석을 이용한 글루코스와 초산의 온라인 모니터링)

  • 이종일
    • KSBB Journal
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    • v.13 no.3
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    • pp.244-250
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    • 1998
  • Flow-injection analysis (FIA) for on-line monitoring of glucose and acetate are described and employed in E.coli fermentation process. Glucose oxidase (GOD) for the detection of glucose is immobilized on epoxy polymer support, which is packed in a small cartirdge, and applied to a GOD-FIA system. The detection of acetate is based on the inhibition of acetate to the oxidation of sarcosine by sarcosine oxidase (SOD). SOD is also immobilized on epoxy polymer support and used for a SOD-FIA system. GOD-FIA system is characterized as well as SOD-FIA system by the investigation of the effects of pH, temperature and metabolites in samples on the peak height. GOD-FIA and SOD-FIA systems were also applied for on-line On-line measurements buy FIA measurements by FIA were in god agreement with off-line measurements.

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Automatic Analysis of Volatile Basic Nitrogen of Pork with an On-line Flow Injection Analysis System (온-라인 FIA시스템에 의한 돈육의 휘발성염기질소의 자동분석 -연구노트-)

  • 이형춘
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.29 no.5
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    • pp.965-967
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    • 2000
  • An on-line FIA system in place of traditional Conway method was used for quicker and simpler analysis of volatile basic nitrogen of pork. The on-line system was developed by connecting an FIA apparatus with an ammonia electrode as a detector to a personal computer. The data from Conway method and from the on-line FIA system were in good agreement and the correlation coefficient was 0.981. One sample could be analyzed in about 4 min.

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Development of On-line Monitoring Techniques for Fumaric Acid and Succinic Acid by Flow Injection Analysis (흐름주입분석기술에 의한 푸마르산과 숙신산의 모니터링 기술 개발)

  • 손옥재;김춘광;이종일
    • KSBB Journal
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    • v.18 no.5
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    • pp.377-384
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    • 2003
  • On-line monitoring techniques for fumaric acid and succinic acid were developed by flow injection analysis (FIA). For the determination of fumaric acid, two enzymes, fumarase and malic dehydrogenase were immobilized on VA-epoxy Biosynth E3-carrier and integrated into a FIA-system with a fluorescence detector. For the analysis of succinic acid, isocitrate lyase and isocitrate dehydrogenase were also immobilized on VA-epoxy polymer support and used in a FIA system. The immobilized enzymes in two FIA systems were characterized systematically, e.g. optimum pH and temperature, inhibitory effects etc. Two FIA systems were also used to on-line monitor the concentrations of fumaric acid and succinic acid in biotechnological processes. Good agreement between on-line monitored data and off-line data measured by HPLC showed extensive application of the FIA systems in bioprocesses.

흐름주입분석 기술을 이용한 젖산의 온라인 모니터링

  • Kim, Jun-Hong;Lee, Jong-Il;Kim, Mi-Seon
    • 한국생물공학회:학술대회논문집
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    • pp.241-243
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    • 2001
  • On-line monitoring technique for the concentration of lactate by a FIA(Flow Injection Analysis) system was studied. The lactate oxidase(LOD) was immboilized on VA-Epoxy carrier and integrated into the FIA system. The pH, buffer flow rate and temperature for the LOD-FIA were optimized, and the effects of salts and metabolites dissolved in the sample on the activity of immobilized enzyme were investigated. The LOD-FIA has been applied to monitor the concentrations of lactate in a simulated bioprocess. The on-line monitoring data by the LOD-FIA agreed with the off-line data measured by a fluorescence spectroscopy well.

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Development a glucose-FIA system with a fiber optic oxygen sensor

  • Sohn, Ok-Jae;Lam, Tuan-Hung;Rhee, Jong-Il
    • 한국생물공학회:학술대회논문집
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    • pp.730-734
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    • 2005
  • Flow injection analysis (FIA) system was developed to monitor glucose concentrations in biotechnological processes. A fiber optic oxygen sensor was used to determine consumption of oxygen concentration by reaction of immobilized glucose oxidase (GOD). The GOD was immobilized on VA-Epoxy carrier and integrated into FIA system. A calibration curve for glucose was obtained in the range of 0.5 $g/L{\sim}3.0$ g/L.

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Potentiometric Determination of L-Malate Using Ion-Selective Electrode in Flow Injection Analysis Syste

  • Kwun, In-Sook;Lee, Hye-Sung;Kim, Meera
    • Preventive Nutrition and Food Science
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    • v.4 no.1
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    • pp.79-83
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    • 1999
  • A potentiometric biosensor employing a CO3-2 ion-selective electrode(ISE) and malic enzyme immobilization in al flow injection analysis (FIA) system was constructed. Analytical parameters were optimized for L-malate determination . The CO3-2 -ISE-FIA system was composed of a pump, an injector, a malic enzyme (EC1.1.1.40) reactor, a CO3-2 ion-selective electrode, a pH/mV meter and a recorder. Cofactor NADP was also injected with substrate for theenzyme reaction into the system. Optimized analytical parameters for L-malate determination in the CO3-2 ISE-FIA system were as follows ; flow rate, 14.5ml/hr ; sample injection volume, 100ul; enzyme loading in the reactor, 20 units ; length of the enzyme reactor , 7 cm ; tubing length form the enzyme reactor to the detector as a geometric factor in FIA, 15 cm . The response time for measuring the entire L-malate concentration range (10-2 ~10-5 mol/L ; 4 injections )was <15minutes . In this CO3-2 -ISE-FIA system, the potential differences due to th eformation of CO3-2 by the reaction of malic enzyme on L-malate were correlated to L-malate concentration in the range of 10-2 ~10-5mol/L ; the detection limit was 10-5 mol/L. This potentionmetric CO3-2 ISE--FIA system was found to be useful for L-malate measurement.

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A Study on the Measurement of Dissociation Constant of Organic Acid with FIA (FIA에 의한 유기산의 해리상수 측정에 관한 연구)

  • Rhee, Jae-Seong;Park, Hyun-Mee;Kim, Hee-Jin;Lee, Kang-Bong;Dasgupta, Purnendu K.
    • Analytical Science and Technology
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    • v.7 no.2
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    • pp.173-179
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    • 1994
  • The point of present study was focused on developing the method for the determination of dissociation constant by means of FIA conjunction with Diode Array Spectrphotometry or spectrophotometry along with small amount of Bromocresol Green(mg order) within short time. On the calculation with computer, the indicator with pK=7 has been shown the most sensitive reaction when little amount of base or acid has been added. The pKa of Bromothymol Blue and Bromocresol Green were measured as 7.31 and 4.82 respectively with spectrophotometry after activity correction by Kielland method (Reported value by Bishop, 7.30 and 4.79). The pKa of Bromocresol Green by FIA was obtained as 4.78 and was comparable with other values determined by other methods.

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Evaluation of Masticatory Efficiency and Oral Health Related Quality of Life in Temporomandibular Disorder Patients (측두하악장애 환자에서 저작 효율 및 구강건강관련 삶의 질 평가)

  • Lee, Yong-Seung;Byun, Young-Sub;Choi, Jong-Hoon;Ahn, Hyung-Joon
    • Journal of Oral Medicine and Pain
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    • v.35 no.2
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    • pp.135-147
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    • 2010
  • In this study, the objective masticatory efficiency of two groups of temporomandibular disorder patients, pain and sound groups, was compared with that in a normal group using the MAI (mixing ability Index). The subjective chewing ability was evaluated using questionnaires, such as the Food Intake Ability Index (FIA) and Visual Analogue Scale (VAS). The Oral Health Impact Profile (OHIP)-49K of the patients was also examined to measure the oral health-related quality of life. The results were as follows: 1. The MAI, FIA and VAS in the pain group were significantly lower than in the normal and sound groups. This shows that the chewing efficiency of the pain group was lower than the normal and sound groups (P<0.05). However, there was no significant difference between the sound and normal groups. 2. The OHIP-49K for the oral health-related quality of life showed a significant increase in both the pain and sound groups compared with normal group. This means that the oral health-related quality of life was lower in both the pain and sound groups. 3. There was a correlation between the MAI, FIA and VAS (P<0.01) in all subjects (71 persons). The OHIP-49K was associated with the FIA and VAS. 4. There was a correlation between the FIA and VAS (P<0.05) in the sound group but no correlation in the other groups. 5. There was a correlation between the FIA and VAS in all groups. 6. The VAS was increased significantly in the pain group according to the level of pain reduction after treatment (P<0.05). However, there was no significant increase in the MAI, even though there was an improvement in masticatory efficiency. In addition, there was no difference in the FIA and OHIP-49K according to the level of pain reduction after treatment. In this study, it is believed that pain is a main factor decreasing the masticatory efficiency in patients with temporomandibular disorders. Moreover, TMJ sounds decrease the quality of life but do not decrease the masticatory efficiency. Therefore, it is important to control the pain in order to improve the masticatory efficiency in temporomandibular disorder patients. Moreover, managing both pain and sound can improve the quality of life.

Is Definitive Surgery Necessary for Fistula-in-ano in Infant (영아기 치루와 수술의 필요성)

  • Lee, Myung-Duk
    • Advances in pediatric surgery
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    • v.8 no.1
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    • pp.6-10
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    • 2002
  • To clarify the necessity of surgery for fistula-in-ano (FIA) in infant, a retrospective analysis of 82 cases FIA in infant were performed for 11 years period from 1987 to 1998. Group A included 44 cases in the period of surgery oriented treatment to 1992, and group B contained 38, period of feeding control oriented management (FC) after 1993. FC, that was indicated in case with loose stool and eczematoid perianal skin (LSES), composed of quit breast feeding, change of cow milk or complete weaning. Surgical decision was made after improvement of stool condition. Fistulectomy was performed in 29 cases (65.9 %) of group A. However, in group B, only 15 cases (39.5 %) required surgery (p=0.0036). Thirty-four cases in B had the history of LSES, and Fe was applied in 25, and was effective in 24. Among 24 cases, 21 showed complete healing with FC, 3 had surgery because of the persistent FIA, and 1 got operation due to no improvement of stool condition. In conclusion, Fe has to be applied to FIA in infant before surgery, particularly in cases with history of LSES. As one of the etiologic factors for FIA, LSES could be considered to this particular age group.

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