• 멤브레인
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• 제23권4호
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• pp.297-303
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• 2013

혈액 속의 글루코우즈의 농도를 측정하기 위해 포스파젠 고분자로 만들어진 진단막을 제조하였다. 혈액 속에 존재할 가능성이 있는 장애성분들이 글루코우즈의 농도측정에 미치는 영향을 조사하였다. 그러한 물질들 중, ascorbic acid (AA)는 기준 플라즈마 용액보다 3~9% 정도 높은 K/S 결과치를 나타내었고, tolbutamide (TA)는 기준용액보다 11~13% 정도 낮은 K/S 결과치를 나타내었고, triglycerides와 bovine serum albumin (BSA)은 기준용액 보다 20~25% 정도 낮은 K/S 결과치를 나타내었다. 그러나 위의 물질들을 제외하고는 대부분의 장애성분들이 포스파젠 고분자 진단막을 이용한 혈당측정에 큰 영향을 미치지 않는다는 것을 보여 주었다.

• 한국자기공명학회논문지
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• 제16권2호
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• pp.122-132
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• 2012

The effects of the sample viscosity and volume on the convective flows induced by temperature gradient in PGSE-NMR self-diffusion measurements at high temperature have been investigated. The experimental results showed that the viscosity of the liquid sample strongly affects the magnitude of the convective flows as well as the diffusion coefficient itself. It was also found that the convective flows increase as the sample volume increase.

• 대한음성학회:학술대회논문집
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• 대한음성학회 2002년도 11월 학술대회지
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• pp.145-149
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• 2002

This study was performed to find out changes in acoustic measurements of voice after eating egg, apple and pear. Ten college students vocalized /a/ before and after eating egg, apple and pear. Dr. Speech was utilized to obtain changes of subjects's acoustic measurements. A t-test was peformed to determine acoustic changes of voice before and after eating egg, apple and pear. No significant difference was observed in acoustic measurements before and after eating egg, apple and pear. However, the subjects seemed to show some improvements in Jitter, HNR, and NNE in the order of egg, apple, and pear even though they did not reach a statistical significance. It was concluded that a more systematic research paradigm is needed in order to objectively reject or substantiate a variety of conceptions on food items and their effects on voice.

• Corrosion Science and Technology
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• 제11권6호
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• pp.247-256
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• 2012

Harmonic current was measured for a dummy cell with various values of resistance, and the procedure developed through the measurements was applied to the investigation of effects of the amplitude of applied frequency and applied potential on the harmonic current of a stainless steel and a carbon steel in chloride containing solutions. From the measurements of harmonic current in the dummy cell, the optimum values of applied frequency and applied potential in harmonic current measurements were found to be 1 mHz and 20 mV (or lower), respectively. Increase in harmonic current with applied frequency was observed in the case where the level of harmonic current is low as in a stainless steel. Decrease in polarization resistance was also noted in this corrosion system with either increasing applied frequency or decreasing applied potential. However, no obvious effects of applied frequency was observed on harmonic current and polarization resistance in a carbon steel in which the level of harmonic current is high.

• Bulletin of the Korean Chemical Society
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• 제31권11호
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• pp.3139-3144
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• 2010

A model system has been established for the evaluation of the uncertainty of the value from measurements of multiple subsamples by isotope dilution mass spectrometry (IDMS). In this report, we apply this model system for the evaluation of measurement uncertainty in determination of folic acid in infant formula. Five subsamples were analyzed by IDMS. The mean of the measurement results of the five subsamples was assigned as the final measurement value. The standard deviation (s) of the results from five subsamples was attributable to repeatability of the measurement. The uncertainty components in the IDMS measurement methods were categorized into two groups. Group I includes uncertainty components which give common systematic effects to all subsamples and do not contribute to the variation among multiple measurements (repeatability). Group II includes uncertainty components that give random effects on the measurement results, and are related with the measurement repeatability. These random effects are attributed to s. Therefore, the uncertainty of the final value was calculated by combining the standard deviation of the mean of multiple measurements, $s/{\surd}n$ (where n = 5), and the measurement uncertainty associated with the uncertainty components that give systematic effects.

• Nutrition Research and Practice
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• 제17권4호
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• pp.698-716
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• 2023

BACKGROUND/OBJECTIVES: The aim of this study was to evaluate the sensory properties of antioxidant-rich bread made by adding pomegranate peels and their effects on anthropometric measurements and metabolic and oxidative parameters of individuals with type 2 diabetes after consumption. SUBJECTS/METHODS: This randomized, double-blind, placebo-controlled study was conducted with 22 individuals aged between 19 and 64 years who had been diagnosed with type 2 diabetes for at least 5 years, used only metformin, did not lose more than 10% of their body weight in the last 6 months, and had a body mass index of ≥ 25.0 kg/m². While the study group (n = 11) consumed bread containing 500 mg pomegranate peel daily for 8 wk, the control group (n = 11) consumed standard bread. Anthropometric measurements and metabolic and oxidative parameters of individuals were evaluated at the beginning and end of the study. RESULTS: Decreases were detected in the waist circumference, waist/hip and waist/height ratios, body fat percentages, blood pressure, and serum insulin, triglyceride, and total cholesterol levels in the individuals in the treatment group, compared with those in the control group (P < 0.05). CONCLUSIONS: Pomegranate peel consumption by individuals with type 2 diabetes may have positive effects on anthropometric measurements and glycemic and lipid parameters.

• 멤브레인
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• 제25권3호
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• pp.239-247
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• 2015

새로운 형태의 포스파젠 진단막을 제조해 혈액 속의 글루코우즈의 농도를 측정하였다. 혈액 속에 존재할 가능성이 높은 장애성분들을 4가지 그룹으로 분류하여 혈당 측정에 미치는 영향을 조사하였다. 가장 낮은 농도를 나타내는 시리즈 I의 경우, 대부분의 첨가물들이 혈당 측정에 큰 영향을 미치지 않았으나, 오직 ascorbic acid (AA)만이 기준 용액보다 5~8% 정도 높은 K/S 결과치를 나타내었다. 시리즈 II의 경우, 네 가지 첨가물 모두 기준 용액의 K/S 결과치보다 3~4% 다소 낮은 값을 보였으나 농도에 따른 일정한 값을 보여 주었다. 시리즈 III의 경우, 세 가지 첨가물 모두 기준 용액에서 얻어지는 K/S 결과치와 큰 차이를 보이지 않았다. 가장 높은 농도를 나타내는 시리즈 IV의 경우, 두 가지 물질 모두가 기준 값보다 11~15% 정도 낮은 수치를 나타내었으나 혈당 측정에 크게 영향을 주지는 않았다.

• 멤브레인
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• 제18권4호
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• pp.268-273
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• 2008

혈액 속에 있는 글루코우즈의 농도를 측정하기 위해 폴리아크릴로니트릴로 만들어진 진단막을 제조하였다. 혈액속의 글루코우즈의 농도를 변화시켜 가며 폴리아크릴로니트릴 진단막을 가지고 680nm에서의 최종흡광도를 측정하였다. 시간에 따른 흡광도 변화량(K/S)의 최종결과치가 글루코우즈의 농도가 증가함에 따라 직선적으로 증가함을 알 수 있었다. 혈액 속에 존재할 가능성이 있는 화합물들이 글루코우즈의 농도측정에 미치는 영향을 조사하였다. 그 결과 대부분의 화합물들이 글루코우즈의 농도측정에 큰 영향을 미치지 않는 것을 알 수 있었다.

• Structural Engineering and Mechanics
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• 제55권5호
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• pp.965-977
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• 2015

Determination of dynamic parameters of a structure such as predominant frequency and damping ratio is one of the most important subjects in dynamics of structures. Different methods are used to determine predominant frequency. These methods are different in the cost, implement accessibility, accuracy, speed, applicability in different conditions, simplicity of calculations and required data accessibility. Calculation of damping ratio by using common experimental procedures is very difficult and costly, then it is assumed as a constant value in most calculations. Microtremor measurements and using spectral ratio method to determine the predominant frequency and damping ratio of structure is of interest in recent years. In this paper, as a case study, the effects of retrofitting on structural dynamic parameters of two four-story buildings by using microtremor measurements and also finite element analysis, is investigated. The results of this study show that microtremor measurements can be utilized to assess the improvement of dynamic behavior of the retrofitted structure and the effectiveness of the method of retrofitting.

• 한국해양공학회지
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• 제34권6호
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• pp.377-386
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• 2020

This paper discusses the effectiveness of onboard measurements and data extracted from weather information for speed-power analysis. Furthermore, validation results of hull and propeller cleaning and painting during dry-docking are discussed. Wind and wave information can be obtained from onboard measurements or weather information from the National Oceanic and Atmospheric Administration (NOAA). The weather information of a specified position and time is extracted from NOAA weather data and compared with onboard measurements. In addition, to validate the effects of hull cleaning and painting during dry-docking, speed-power analysis results of before and after dry-docking are compared. The results show that both onboard measurements and weather information show acceptable reliability when added resistance and speed-power analysis results are compared with each other. Moreover, the ship performance analysis (SPA) software clearly shows the effects of hull cleaning and painting, and it can provide reliable analysis results with either onboard measurements or weather information. In conclusion, it is confirmed that the analysis method and SPA software used in this study are effective in analyzing the ship's speed-power performance.