• 대한청각학회지
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• 제23권2호
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• pp.112-117
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• 2019

Background and Objectives: The purpose of this study was to evaluate the efficacy of revision cochlear implant (CI) surgery for better speech comprehension targeting patients with low satisfaction after first CI surgery. Subjects and Methods: Eight patients who could not upgrade speech processors because of an too early CI model and who wanted to change the whole system were included. After revision CI surgery, we compared speech comprehension before and after revision CI surgery. Categoies of Auditory Performance (CAP) score, vowel and consonant confusion test, Ling 6 sounds, word and sentence identification test were done. Results: The interval between surgeries ranged from eight years to 19 years. Same manufacturer's latest product was used for revision surgery in six cases of eight cases. Full insertion of electrode was possible in most of cases (seven of eight). CAP score (p-value=0.01), vowel confusion test (p-value=0.041), one syllable word identification test (p-value=0.026), two syllable identification test (p-value=0.028), sentence identification test (p-value=0.028) had significant improvement. Consonant confusion test (p-value=0.063), Ling 6 sound test (p-value=0.066) had improvement but it is not significant. Conclusions: Although there are some limitations of our study design, we could identify the effect of revision (upgrade) CI surgery indirectly. So we concluded that if patient complain low functional gain or low satisfaction after first CI surgery, revision (device upgrade) CI surgery is meaningful even if there is no device failure.

• 한국염색가공학회지
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• 제11권4호
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• pp.24-30
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• 1999

Cotton fabric was dyed with indigo at different pHs, dye concentrations, and repeated dyeings. And the K/S value and dye uptake of the dyed materials at those conditions were determined. The decrease of pH during the reduction process of indigo stock solution was observed. As a result the decrease of pH of the dye stock solution depended on the dye concentration and initial pH. The highest K/S value was shown at fabric dyed at pH 11 and the relationship between K/S value and dye uptake depended on initial pH of reduction bath and the slope was lower as the pH increased to 13.

• 분석과학
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• 제33권5호
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• pp.215-223
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• 2020

The objectives of the present study were to assess the oxidative stability of South Korean n-3 (omega-3 fatty acid) supplements carried out from 2018 to 2019 and evaluate the influence of product characteristics on oxidative safety. A total of 76 n-3 supplements were analysed for oxidation safety by four markers, including acid value (AV), primary oxidation (peroxide value, PV), secondary oxidation (p-anisidine value, pAV) and total oxidation value (TOTOX). Among the supplements tested, 5.3 %, 55.3 %, 28.9 % and 46.1 % exceeded the international voluntary recommended levels for AV, PV, pAV and TOTOX, respectively. Purity (%) of products, remainder of expiration date (suggested shelf life), package in press through package (PTP) and products with additives had statistically significant differences oxidation assessment levels (p < 0.05). In addition, n-3 group found in Algae oil had significantly lower AV levels than the group that did not, and product with Alaska pollack oil, had significantly higher pAV levels than without group (p < 0.05). The high oxidation status of South Korean n-3 products in the present study could not be considered a public health problem right now. However, the levels of oxidation may affect a lot the efficacy and safety of using n-3 supplements. Thus, current oxidation safety limits should be reestablished by regulatory bodies to ensure the safety and efficacy of n-3 supplements, so that the standards could be applied to the products available to consumers.

• 한국치위생학회지
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• 제13권3호
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• pp.439-448
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• 2013

Objectives : The objective of this study is to investigate the work value factors and the professional attitude factors of dental hygienists and provide basic data for dental hygiene curricula. Methods : A total of 329 dental hygiene students in 4 universities completed the questionnaire which consisted of 15 questions for the work value factors and 10 questions for the professional attitude factors. Correlation between the work value factors and the professional attitude factors was analyzed. Results : The "students with no clinical practice experience (4.34 points)" were seen to be statistically significant (p= .013) in the work value factors, as compared to the "students with clinical practice experience (4.19 points)". In accordance with the grade level (p= .000), conformity in aptitude (p= .022), satisfaction level for the major (p= .000), desired duration of career (p= .009), and presence of recommendation for dental hygiene department (p= .000), the professional attitude factors had statistically significant differences. The higher the scores of the work value factors of dental hygiene students, the higher the scores of the professional attitude factors appeared, there by showing a positive (+) correlation (r= .367). Conclusions : For the cultivation of work value factors and professional attitude factors for dental hygiene students, it is necessary to improve the educational system that reflects the operation of a counseling and mentoring by the utilization of structured personality type testing tools and an improvement of interpersonal relationships.

• Asian-Australasian Journal of Animal Sciences
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• 제4권1호
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• pp.67-71
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• 1991

The purpose of this study was to investigate the possibility of using the buffer index curve as a criterion of silage quality evaluation. The buffer index (or buffer capacity, $\beta$) value is the amount of 0.1N NaOH consumed in titrating from the beginning to the end of the chosen pH step. This value equals the slope of the titration curve at the chosen pH range (${\beta}={\Delta}NaOH/{\Delta}pH$). There were two patterns of buffer index curve. Poorly preserved silages had a peak at pH 5.0, whereas with well preserved silages the peaks tended to rise to the pH 3.75 or 4.00. Well preserved, wilted silages with high pH also appeared to have peak values at pH 3.75 or 4.00. There was a high positive correlationship between the concentration of lactic acid and peak value of good quality silage (r = 0.994, p < 0.01). Also a high positive correlationship (r = 0.899, p < 0.001) was found between the sums of concentration of acetic and butyric acids and the peak values of poor quality silages. The results of these experiments verified the value of the buffer index method as a criterion of silage quality evaluation.

• 유통과학연구
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• 제10권2호
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• pp.19-28
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• 2012

포화상태에 이른 우리나라 종합슈퍼들의 심각한 경쟁으로 인한 부작용을 해결할 수 있는 단서를 찾기 위해 본 연구는 종합슈퍼들의 다양한 마케팅 커뮤니케이션 요인들이 소비자들의 점포충성도에 미치는 직접적인 영향과, 마케팅 커뮤니케이션 요인들과 소비감정, 점포충성도 각각에 대해 소비가치와 소비감정이 유인가(valence)를 이끌어낼 수 있는지를 확인하고자 하였다. 특히 미래의 소비자인 대학생들의 관점에서 구성한 연구모델을 분석함으로써 장기적인 차원에서 종합슈퍼들이 경쟁력 강화를 위해 얻을 수 있는 단서를 찾고자 하였다. 본 연구의 수행을 위해 먼저 마케팅 커뮤니케이션의 각 요인들로는 선행연구를 근거로 광고, 퍼블리시티, 판매촉진, 구전, 물리적 환경을 채택하였으며, 가치는 쾌락적 가치와 실용적 가치로 나누어 분석하였다. 연구 결과는 다음과 같다. 첫째, 종합슈퍼들의 마케팅 커뮤니케이션 각 요인들이 점포충성도에 미치는 영향을 분석한 결과 광고, 퍼블리시티, 판매촉진, 구전, 물리적 환경의 각 요인들이 모두 통계적으로 유의미한 정(+)의 영향을 미치는 것을 확인하였다. 마케팅 커뮤니케이션 하위 요인들 중 어떤 요인이 점포충성도에 미치는 영향이 더 큰지를 확인한 결과에는 구전요인(β =.53, p<.01)만이 통계적으로 유의미한 결과를 보였다. 이에 대해서는 대학생들은 다른 요인들에 비해 구전 요인을 좀 더 점포를 신뢰하는데 중요한 요인으로 생각한다고 해석하는 것이 바람직할 것이다. 둘째, 종합슈퍼들의 마케팅 커뮤니케이션 각 요인들과 점포충성도의 관계에서 쾌락적 가치와 실용적 가치의 조절효과를 검증한 결과 유일하게 퍼블리시티와 점포충성도간에 실용적 가치만이 통계적으로 유의미한 영향을 미치는 것으로 나타났다. 흥미로운 것은 실용적 가치가 퍼블리시티와 점포충성도 간에 부(-)적인 영향을 미치는 것으로 분석되었는데, 이는 최근까지 이슈화된 종합슈퍼들에 대한 매스미디어의 부정적 기사들에 대해 대학생들이 민감하게 반응한 결과로 해석할 수 있다. 셋째, 마케팅 커뮤니케이션 각 요인들과 소비감정 간에 소비가치의 조절효과를 검증한 결과 쾌락적 가치만이 퍼블리시티와 소비감정에 조절효과를 보이지 않았으며, 모든 요인들이 조절효과가 있음을 확인하였다. 따라서 대학생들이 인지하는 소비가치는 마케팅 커뮤니케이션과 점포충성도 간의 관계보다 소비감정 간에 더 영향을 미치고 있음을 알 수 있었다. 마지막으로, 마케팅 커뮤니케이션의 각 요인들과 점포충성도의 관계에서 소비감정의 매개효과를 검증한 결과 판매촉진을 제외하고 모든 요인들이 완전 매개 또는 부분 매개하는 것으로 나타났다. 이는 소비감정이 점포충성도를 높이는데 중요한 요인임을 시사하고 있으며 종합슈퍼들이 긍정적 소비감정의 증대를 위한 노력을 하여야 함을 의미한다고 판단된다. 말미에는 이 연구결과를 통해 얻을 수 있는 영향을 제시하였으며 향후에는 범위를 넓혀 일반인들을 대상으로 한 연구와 함께 세대 간 차이를 확인할 필요가 있음을 제안하였다.

• 한국근적외분광분석학회:학술대회논문집
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• 한국근적외분광분석학회 2001년도 NIR-2001
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• pp.1275-1275
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• 2001

The pH value of grass silages is one important parameter to determine the quality of the forages. In an attempt to use NIRS spectra taken for other quality parameter of grass silage it has been shown that a good correlation between NIR spectra of the dried forage and pH value of the fresh forage could be determined. Further investigations revealed that the B coefficients of the pH value calibration were almost the same as the B coefficients of the sugar calibration multiplied with -1. And indead the pH value - in the fresh sample material - of the calibration set is strongly correlated with the sugar concentration - in the dried sample material. It is concluded that next to scientific tools in research the scientist and the user of NTRS equippment has to scrutinze his own work. Examples are given. NIRS is a powerfull technique, but pitfalls are present in surplus.

• 한국농공학회논문집
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• 제55권2호
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• pp.37-45
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• 2013

The aim of this study was to investigate chemical characteristic of livestock compost in association with livestock manure types (poultry, cattle, swine, and mixed manure). The livestock compost was collected from local nonghyup branches on a si-gun level. Chemical composition (nutrients, heavy metals etc.) of the samples was analyzed and Pearson's correlation analysis was performed. Quality of most compost samples met the standard of fertilizer specifications. Poultry compost contains greater nutrients especially $P_2O$ (p-value<0.01) and $NH_4$-N (p-value<0.05). Meanwhile swine compost has higher concentration in water content (p-value<0.05) and heavy metals (p-value<0.01 for Cd, Cu and Zn). Overall, poultry compost was correlated positively with nutrients while swine compost has positive correlation with water content and heavy metals. We expect that the study results can provide base data for determining compost types and amount for crop production.

• Journal of Ginseng Research
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• 제22권3호
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• pp.193-199
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• 1998

The purpose of this study was to Investigate characteristics of the water soluble browning reaction products (WS-BRPs) from Korean red ginseng by heat treatment. Absorbance of WS- BRPs was increased with increases of heating temperature and time, but pH value were decreased In Muter color value L and b value were decreased, while a value was increased. and absorbance at 280 nm in spectrum of the WS-BRPs was increased according to the increase of heating temperature. When the WS-BRPs were applied on Bio-Gel P-30 column after heating and pH treatment, two majors browning products increased according to the progress on time. And pH 3.0 increased in quantity of high molecular fractions and pH 8.0 increased in quantity of low molecular fractions.

• 한국식품조리과학회지
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• 제4권2호
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• pp.1-9
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• 1988

This study was carried out in order to study the foaming properties of mungbean protein. Mungbean protein isolate was tested for the purpose of finding out the effect of pH, addition of sucrose on foaming properties. The results were summarized as follows: 1. Foam expansion values were generally depen. dent on protein concentration to 3% protein suspension. From 1% to 3% suspension, foam expansion values increased. However over 3% suspension, the values decreased. In 1% mungbean protein suspension, the foam expansion value of suspension at pH 4.5 was greater than that of at pH9. In 3%, 5%, and 10% suspensiona the foam expansion values of suspension at pH 7 was the lowest. Foam expansion value significantly decreased by the addition of sucrose. 2. The foam stability appeared the greatest value as protein concentration increased. It appeared the greatest value at pH 4.5. When sucrose was added, the foam stability increased. The more sucrose was added, the better foam stability was.