• 제목/요약/키워드: determination factors

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HPLC법에 의한 2,4-디니트로플루오로벤젠을 유도체화제로 한 Streptoalloteichus hindustanus ATCC 31218 변이균의 배양액 중 네브라마이신 펙터 2,4,5,5',6, 가나마이신 A 분석 (Determination of Nebramycin Factor 2,4,5,5',6 and Kanamycin A in Fermentation Broth of Streptoalloteichus hindustanus ATCC 31218 Mutant Using 2,4-Dinitrofluorobenzene(DNFB) as a Derivatizing Agent by High Performance Liquid Chromatography)

  • 박영근;박명용;김승철;양호길
    • 약학회지
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    • 제37권1호
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    • pp.1-8
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    • 1993
  • A procedure for the high-performance liquid chromatographic determination of Nebramycin factors in fermentation broth of Streptoalloteichus hindustanus ATCC 31218 mutant was investigated using pre-column derivatization and LTV detection. The method is based on pre-column derivatization of Nebramycin factors with 2,4-dinitrofluorobenzene(DNFB) in the presence of Tris (hydroxymethyl)aminoethane. The chromatographic separation of derivatives of Nebramycin factors and unknown impurities is achieved using reversed-phase column (NOVA-PAK $C_{18}$, Waters Co.) and AcCN : H$_{2}$O : AcOH (53.0:46.5:0.5) as a mobile phase. The mixture of these derivatives were separated within 35 minutes and the optimum wavelength($\lambda_{max}$ ) of the UV detector was 353 nm. The linearity of response for derivatives of Nebramycin factors is demonstrated for concentrations up to 500 $\mu\textrm{g}$/ml and the relative standard deviation is less than 0.79%. Detection limit was 1.67 ng for the 10 $\mu\textrm{l}$ sample volume employed.

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Decisional Balances and the Process of Change in Smoking Cessation in Patients with Coronary Artery Diseases

  • Son, Haeng-Mi
    • 대한간호학회지
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    • 제33권8호
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    • pp.1171-1177
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    • 2003
  • Purpose. Despite many smoking cessation programs, many patients with CAD continue to smoke or re-smoke. The processes of change and self-change for smoking cessation is emphasized. The purpose of present study was to investigate decisional balances and processes of change according to stages of change for smoking cessation in the patients with CAD. Methods. This descriptive study was performed using the self-reported questionnaires from 157 male patients with CAD who have smoking experiences. The questionnaires consisted of decisional balances toward smoking (pros/cons) and processes of change including 7 factors. Results. 45.2% of the subjects had myocardial infarction and 54.8% for angina pectoris. Major stages of change were maintenance, contemplation, and precontemplation in 62%, 14%, and 18% respectively. The mean score of pros smoking was 31.07 and cons smoking was 32.52. The mean scores of processes of change were high in all 7 factors, especially in self determination. The pros smoking in precontemplation stage was significantly higher than those in other stages. Between contemplation and precontemplation stages, processes of change showed significant differences in stimulus control, self determination, information management, and dramatic relief. Conclusion. This study suggests that decisional balances and processes of change are stage-specific. As this study, smoking cessation program in the patients with CAD must put priority on the patients group in pre-contemplation and contemplation stages, and stress self determination and dramatic relief.

간호학과 여학생의 절주의도 영향요인 (Factors Affecting Female Nursing Students' Intention to Control Drinking)

  • 송효숙;임소희
    • 한국학교보건학회지
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    • 제32권2호
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    • pp.116-124
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    • 2019
  • Purpose: This study was performed to measure the influence of drinking motives, drinking refusal self-efficacy, and self-determination on the intention to control drinking among nursing students. Methods: A cross-sectional survey was done with the participation of 258 nursing students attending four universities in G city. Data collection was conducted from May to June, 2018, using a self-report questionnaire. Data were analyzed using the t-test, ANOVA, $Scheff{\acute{e}}$ test, Pearson's correlation coefficients, and Hierarchical multiple regression. Results: The average scores for drinking motives, drinking refusal self-efficacy, self-determination, and intention to control drinking were 2.29, 4.54, 3.89, and 4.29 respectively. There were significant differences in the intention to control drinking according to grade, religion, and age of alcohol initiation. The factors influencing the intention to control drinking in nursing students were identified as self-determination (${\beta}=.24$), drinking refusal self-efficacy (${\beta}=.17$) and drinking motives (${\beta}=-.17$). This factor explained 26% of the nursing students' intention to control drinking. Conclusion: Therefore, it is necessary to develop a alcohol education program to improve the drinking culture of nursing college students and to improve their self-regulation skills in order to help them form a desirable drinking habit, and it is also necessary to apply the developed intervention program and test the effect.

CMM 데이터로부터 방전조건 결정 (Determination of EDM Parameters from CMM Data)

  • 주상윤
    • 한국공작기계학회:학술대회논문집
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    • 한국공작기계학회 1998년도 춘계학술대회 논문집
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    • pp.35-39
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    • 1998
  • Determination of effective EDM parameters is significant to increase productivity. However, With the complexity of EDM phenomena, a universal selection method of EDM parameters has not been established yet. Moreover, No attempt has been tried before to suggest a logical method in determining essential machining parameters for effective electrical discharge machining. Peak current, one of the most significant factors in EDM, is proportional to EDM area. This paper presents a method that can be Z-map modeling from CMM data, and calculate EDM area using Z-map.

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균열선단 특이요소를 이용한 직교이방성판의 응력확대계수 결정에 관한 연구 (A Study on Determination of Stress Intensity Factor of Orthotropic Plates Using Crack Tip Singular Element)

  • 진치섭;최현태;이홍주
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 1991년도 가을 학술발표회 논문집
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    • pp.124-128
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    • 1991
  • Wood, laminates, reinforced concrete, and some special types of metals systems with controlled grain orientation are often orthotropic and at least rectilinearly anisotropic from point to point, if regarded as homogeneous media. Orthotropic bodies where a crack is not associated with a plane of elastic symmetry may be conveniently treated as a crack problem in a generally anisotropic body. At this work, approach for the determination of the stress intensity factors (SIF) of anisotropic body using crack tip singular elements is presented. Caculated values are in good agreement with the others.

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Simultaneous Kinetic Spectrophotometric Determination of Sulfite and Sulfide Using Partial Least Squares (PLS) Regression

  • Afkhami, Abbas;Sarlak, Nahid;Zarei, Ali Reza;Madrakian, Tayyebeh
    • Bulletin of the Korean Chemical Society
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    • 제27권6호
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    • pp.863-868
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    • 2006
  • The partial least squares (PLS-1) calibration model based on spectrophotometric measurement, for the simultaneous determination of sulfite and sulfide is described. This method is based on the difference between the rate of the reaction of sulfide and sulfite with Malachite Green in pH 7.0 buffer solution and at 25 ${^{\circ}C}$. The absorption kinetic profiles of the solutions were monitored by measuring the decrease in the absorbance of Malachite Green at 617 nm in the time range 10-180 s after initiation of the reactions with 2 s intervals. The experimental calibration matrix for partial least squares (PLS-1) calibration was designed with 24 samples. The cross-validation method was used for selecting the number of factors. The results showed that simultaneous determination could be performed in the range 0.030-1.5 and 0.030-1.2 $\mu$g m$L ^{-1}$ for sulfite and sulfide, respectively. The proposed method was successfully applied to simultaneous determination of sulfite and sulfide in water samples and whole human blood.

모바일 소셜 네트워크 게임 이용만족에 영향을 미치는 요인: 품질과 자기결정성 요인을 중심으로 (Factors Affecting User Satisfaction of Mobile Social Network Games: Focusing on the Quality and Self-determination)

  • 염동섭;박경하
    • 디지털융복합연구
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    • 제14권11호
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    • pp.459-467
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    • 2016
  • 본 연구는 최근 모바일을 기반으로 급성장하고 있는 소셜 네트워크 게임에 대해 이용자들의 만족에 영향을 미치는 요인은 무엇인지 규명해보고자 진행되었다. 이를 위해 제품특성 변인인 품질요인과 소비자 특성 변인인 이용자들의 자기결정성 요인을 중심으로 남, 여 대학생 211명에게 설문조사를 실시하였다. 연구결과 첫째, 모바일 소셜 네트워크 게임에 대한 품질요인을 구성하고 있는 하위 요인 모두 이용자들의 만족에 정(+)의 영향을 미치는 것으로 확인되었다. 둘째, 모바일 소셜 네트워크 게임에 대한 자기결정성을 구성하고 있는 하위 요인 모두 이용자들의 만족에 정(+)의 영향을 미치는 것으로 확인되었다. 셋째, 모바일 소셜 네트워크 게임에 대한 품질요인과 자기결정성 요인이 이용만족에 미치는 상대적 영향력은 품질을 구성하고 있는 하위 요인들만 즉, 유희성, 사용편리성, 기능성 순으로 정(+)의 영향을 미치는 것으로 확인되었다. 본 연구결과는 그동안의 연구경향인 기술 공학적 관점과 PC기반의 온라인 게임에서의 탈피를 통해 게임관련 연구영역의 확장이라는 학술적 의의와 함께 이용자들의 편의에 맞는 양질의 게임 콘텐츠 개발을 위한 의미 있는 실무적 시사점을 제공할 수 있을 것으로 기대한다.

Ramp形 A-D 變煥器의 直線性 改善에 關하여

  • 이필재
    • 전자공학회지
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    • 제2권2호
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    • pp.37-42
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    • 1975
  • 램프형 A/D 변환기의 직선도의 정밀도에 영향을 미치는 여러 가지 원인들을 실험적으로 고찰하였다. 아울러 램프형 A/D 변환기의 직선도, 정밀도, 및 상계오차를 개선하기 위한 회로소자의 결정방법을 제안하였다. Various factors which affect the linearity and accuracy of the ramp type analog-to-digital converter have been investigated experimentally. A suggestion hav been made in the determination of circuit parameters with the emphasis on the improvement of the linearity and accuracy in the ramp type analog-to-digital conveter.

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타원균열에 작용하는 일반적인 하중에서의 응력확대계수 계산 (Determination of $k_1$in Elliptic Crack under General Ioading Conditions)

  • 안득만
    • 대한기계학회논문집A
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    • 제21권2호
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    • pp.232-244
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    • 1997
  • In this paper weight function theory is extended to the determination of the stress intensity factors for the mode I in elliptic crack. For the calculation of the fundamental fields Poisson's theorem and Ferrers's method were employed. Fundamental fields are constructed by single layer potentials with surface density of crack harmonic fundamental polynimials. Crack harmonic fundamental polynimials up to order four were given explicitly. As an example of the application of the weight function theory the stress intensity factors along crack tips in nearly penny-shaped elliptic crack are calculated.

검사과오를 고려한 자재의 품질변동과 수입검사방법의 결정 (A Study on the Fluctuations in Quality of Incoming Materials and Determination of the Acceptance Inspection Type with Inspection Error)

  • 이회식
    • 품질경영학회지
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    • 제24권2호
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    • pp.54-64
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    • 1996
  • The inspection policy and inspection error are very critical factors which influence the outgoing quality. In other words, such factors influence the acceptance rate of the incoming matarials. Hence, the outgoing lot size is varied. This paper presents a method to compute the break-even point(pb1, pb2) under these two factors, which canbe used to determine the economic acceptance inspection type.

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