한외여과공정을 이용한 사과주의 품질개선

정재호,목철균,임상빈,박영서,Chung, Jae-Ho,Mok, Chul-Kyoon,Lim, Sang-Bin,Park, Young-Seo 한국응용생명화학회 2003 한국농화학회지 Vol.46 No.3

사과 착즙액을 효모를 이용하여 발효시키는 과정에서 사과주의 발효패턴을 관찰하였으며 숙성과정 및 한외여과에 따른 미생물학적 변화와 이화학적 특성을 조사하였다. 사과 착즙액을 Saccharomyces cerevisiae KCCM 12224를 사용하여 $25^{\circ}C$에서 14일간 발효시킨 후 $15^{\circ}C$에서 14주간 숙성시킨 결과 발효기간 중 총세균과 효모는 각각 $1.4{\times}10^3$ CFU/ml, $4.3{\times}10^4$ CFU/ml에서 $2.8{\times}10^6$ CFU/ml, $1.2{\times}10^7$ CFU/ml로 증가하였다. 숙성과정을 거친 후에는 총세균수는 $10{\times}10^5$ CFU/ml로, 효모수는 $1.2{\times}10^4$ CFU/ml로 감소하였다. 발효기간 중 당도는 $20.0^{\circ}Brix$에서 $8.5^{\circ}Brix$로, 환원당은 9.66%에서 6.44%로 감소한 반면, 알코올 함량은 7.0%로, 산도는 0.19%에서 0.24%로 증가하였다. 14주 동안 숙성하였을 때 pH, 산도, 당도는 큰 변화를 보이지 않은 반면, 환원당과 고형물 함량은 감소하였고 알코올 함량은 11.8%까지 증가하였다. 사과주를 $0.45\;{\mu}m$ nitrocellulose 미세여과막을 이용하여 여과한 후 재질과 공경이 서로 다른 한외여과막을 사용하여 한외여과한 결과 Biomax 100k 막의 초기 $flux(121.2\;liter/m^2/h)$와 평균 flux가 사용한 한외여과막 중에서 가장 높았다. 한외여과에 의해 사과주 내에 존재하는 미생물은 완벽하게 제거되었으며 탁도와 고형물 함량은 감소하였으나 그 이외의 이화학적 특성은 변화하지 않았다. 사과주를 $15^{\circ}C$에서 6주간 저장하였을 경우 저장기간동안 미생물이 전혀 검출되지 않았으며 이화학적 특성도 변화하지 않았다. An apple wine was prepared by fermentation at $25^{\circ}C$ for 2 weeks using Saccha개myces cerevisiae KCCM 12224, followed by aging at $15^{\circ}C$ for 14 weeks, and its physicochemical and microbiological changes were investigated. The viable bacterial cell numbers, increased from $1.4{\times}10^3\;CFU/ml$ at the beginning of fermentation, to $2.8{\times}10^6\;CFU/ml$ after 2 weeks, but decreased to $1.0{\times}10^5\;CFU/ml$ after aging. The viable yeast cell numbers changed from $4.3{\times}10^4\;CFU/ml$ to $1.2{\times}10^7\;CFU/ml$ during the fermentation, and decreased to $1.2{\times}10^4\;CFU/ml$ after aging. Sugar content changed from $20.0^{\circ}Brix$ to $8.5{\circ}Brix$, and reducing sugar content was changed from 9.66% to 6.44%. Alcohol content and acidity increased to 7.0% and from 0.19% to 0.24%, respectively. No changes in acidity, pH, and sugar content were observed during the aging, but reducing sugar and solid contents decreased. When apple wine was fultered through $0.45\;{\mu}m$ nitrocellulose membrane followed by various ultrafiltration membranes with different molecular weight cut-off values, the initial flux $(121.2\;liter/m^2/h)$ and the average flux of Biomax 100k membrane were the highest among the membranes used. These membrane filtration treatments resulted in complete removal of microorganisms as well as decrease in turbidity and solid content without changes in other chemical properties. No changes in the physicochemical properties of the apple wine and no microorganisms were detected during the storage at $156{\circ}C$ for 6 weeks.

아파트가격지수와 민간소비의 동적 연관성

정재호(Chung Jae Ho),유한수(Yoo Han Soo) 韓國不動産學會 2014 不動産學報 Vol.59 No.-

본 연구에서는 경제주체들의 자산 중에 큰 비중을 차지하고 있는 자산인 주택의 가격과 민간 소비금액이 어떤 관계를 갖고 있는지에 대해 분석하였는데, 기존 연구들과 차별되는 연구를 수행하기 위해 비관측요소 모형에 의해 추정된 아파트 근본가치와 민간 소비 간의 동적 관계, 아파트 일시적 가치와 민간 소비 간의 동적 관계에 대해서도 분석하였다. 실증분석 결과를 보면, 관측된 아파트가격지수와 소매판매액지수 간의 관계 분석에서는 관측된 아파트가격지수와 소매판매액지수가 서로 양방향으로 Granger 인과관계를 갖는 것으로 나타났다. 본 연구와 기존 연구들과의 차별적인 측면이라고 할 수 있는 아파트 근본가치와 소매판매액지수 간의 관계, 아파트 일시적 가치와 소매판매액지수의 관계에 대해서 분석한 결과에서도 아파트 근본가치, 일시적 가치와 소매판매액지수가 서로 양방향의 Granger 인과관계를 갖는 것으로 나타났다. 그리고 세 경우 모두 아파트가격지수로부터 소매판매액지수로의 방향의 경우에 F통계량이 크게 나타나 상대적으로 아파트가격지수의 영향력이 큰 것으로 판단되며, 이는 아파트가격지수의 움직임이 소비행위와 관련이 있는 것으로 해석된다. 1. CONTENTS (1) RESEARCH OBJECTIVES Housing is the major component of wealth. Housing price variation may affect private consumption by changing households' perceived wealth, or by changing the value of collateral. Due to wealth effect and liquidity constraint effect, housing prices might be related with consumption. The objective of this paper is to explore the relationship between housing prices and private consumption. (2) RESEARCH METHOD In this study, Apartment Transaction-based Sales Price Index(hereafter ATSPI) is used as a proxy to housing prices and Retail Sales Index(hereafter RSI) is used as a proxy to private consumption. Johansen cointegration test and Granger causality test, and impulse response function analysis are used. (3) RESEARCH FINDINGS The findings of this paper are as follows. To examine the dynamic relationship between ATSPI and RSI, Granger causality test is conducted. First, there is bilateral Granger causality between observed ATSPI and RSI. Second, in the case of the trend component of observed ATSPI, there is two-way Granger causality between the fundamental value of ATSPI and RSI. Third, in the case of the transitory fluctuation of observed ATSPI, there is the feedback relationship between the transitory value of ATSPI and RSI. In all three cases, the F statistic in the direction from ATSPI to RSI is greater than those of the reverse direction. 2. RESULTS These empirical findings of this paper suggest that housing price is related with the movement of consumption market and housing market policy may affect private consumption.

전기투석에 의한 재래식 간장의 저염화

정재호(Jae-Ho Chung),목철균(Chulkyoon Mok),임상빈(Sangbin Lim),우건조(Gun-Jo Woo),백형희(Hyung-Hee Baek),박영서(Young Seo Park) 한국식품과학회 2002 한국식품과학회지 Vol.34 No.5

한외여과공정을 이용한 포도주의 품질개선

정재호(Jae-Ho Chung),목철균(Chulkyoon Mok),임상빈(Sangbin Lim),박영서(Young Seo Park) 한국식품과학회 2003 한국식품과학회지 Vol.35 No.3

未拂 河川敷地 補償制度 改善方案에 관한 硏究

정재호(Chung, Jae Ho),김형근(Kim, Hyeong Geun) 韓國不動産學會 2010 不動産學報 Vol.42 No.-

1. CONTENTS (1) RESEARCH OBJECTIVES The government amended the Special Measures Law on the compensation of land included in rivers on June 26, 2009, in which the land compensated by the Special Measures Law is defined as a land that falls in river areas of national rivers or the first local class rivers. The nation or local government are trying to actively solve this problem for unpaid river sites that were included in rivers, but have not yet been compensated. However, local rivers other than national rivers confront civil complaints because related compensations have been postponed due to the shortage of finances in local governments. First of all, there are some systematic problems for the land compensation of unpaid river sites even though there are various reasons under this circumstance. Therefore, this study desires to suggest reformations by figuring out compensation systems and for loss of unpaid river sites and their status including existing problems. (2) RESEARCH METHOD The time and spatial scope of this study on the reformation of compensation system for unpaid river sites is from 1971 to the present, and the object of this study is the unpaid river sites that were included in national and local rivers in Korea. For a methodology used in this study, we examined some cases that were compensated for unpaid river sites being compensated focusing on national rivers according to the 'construction project for main 4 rivers,' taking into account some cases compensated thanks to the amendment of the Law of Rivers and suggested a reformation for them. (3) RESEARCH FINDINGS The Law of Rivers in Korea acknowledges only a nation's buy-back right excluding a claim for recapture of unfair profits or 'a claim for damages' under the Civil Law according to the state-owned river system. National rivers are being claimed for purchase according to special laws of the Special Measures Law on the compensation of land included in rivers, but the land compensations for local rivers(including small rivers) are being postponed despite a lot of recent civil complaints because local governments should compensate for them by local finances. While the percentage of rivers managed by the nation is 90%, that of rivers managed by the Korean government is less than 10%. Considering that private lands are being included in local rivers due to natural disasters such as floods in summer in Korea, special measures for compensation of the land included from local and small rivers are required at this point. However, more systematic compensation measures should be taken for local and small rivers at the time when the compensation for national rivers are nearly being completed. 2. RESULTS First, we need a reformation to extend a nation's buy-back right for river sites by upgrading local rivers into national rivers. Especially, the fact that a lot of lands are being included mainly in local and small rivers mostly in summer is full of suggestions. Under this circumstance, small rivers should be expanded into local rivers, and local rivers should be expanded national rivers, and thus, they should be compensated for loss according to the special laws. Second, the finances for the compensation of unpaid sites in local rivers should be expanded. Namely, related laws and regulation should be reviewed in order that the compensation for loss can be made by giving rent profits of the land owned by the nation as finances for local governments. Third, the system for active compensation of loss should be arranged by newly establishing departments that are exclusively in charge of the enactment of ordinance for compensation of unpaid river sites and the performance of compensation. Fourth, systematic compensations should be performed by using data through researches on the actual condition of unpaid river sites.

악성 흉막액에서 CEA와 CYFRA 21-1의 진단적 유용성

정재호 ( Jae Ho Chung ),최정은 ( Jeong Eun Choi ),박무석 ( Moo Suk Park ),황상연 ( Sang Yon Hwang ),문진욱 ( Jin Wook Moon ),김영삼 ( Young Sam Kim ),장준 ( Joon Chang ),김주항 ( Joo Hang Kim ),김성규 ( Sung Kyu Kim ),김세규 ( Se 대한결핵 및 호흡기학회 2004 Tuberculosis and Respiratory Diseases Vol.57 No.1

복숭아주 발효시 이화학적 특성변화와 한외여과에 의한 품질 향상

정재호(Jae-Ho Chung),목철균(Chulkyoon Mok),임상빈(Sangbin Lim),박영서(Young-Seo Park) 한국식품영양과학회 2003 한국식품영양과학회지 Vol.32 No.4

복숭아 착즙액의 당도를 24°Brix로 조절하여 25℃에서 2주간 발효하여 제조한 후 15℃에서 14주간 숙성과정 중 복숭아주의 이화학적 성분 및 미생물의 변화를 살펴보았으며 한 외여과 후의 복숭아주의 이화학적 특성의 변화를 관찰하였다. 총 세균수는 발효 초기 2.8×10² CFU/mL에서 2주간의 발효 후에는 2.4×107 CFU/mL로 증가한 후 숙성과정을 거친 후에는 7.0×10³ CFU/mL로 다시 감소하였다. 효모의 경우에는 발효 초기 3.4×10² CFU/mL에서 발효 후에는 2.4×10^7 CFU/mL로 증가한 후, 숙성과정을 거친 후에는 4.0×10⁴ CFU/mL로 역시 감소하는 경향을 보였다. 탁도, 총당, 환원당, 고형물 함량과 b값은 발효가 진행됨에 따라 감소하였고, 산도, 알코올 함량, L값과 a값은 증가하는 경향을 나타내어 발효가 완료된 후의 산도는 0.41%, 알코올 함량은 8.2%의 값을 보였다. 숙성과정 중에는 알코올 함량이 증가한 반면 환원당 함량은 감소하였다. 복숭아주를 0.45 ㎛ nitrocellulose 미세여과막을 이용하여 여과한 후 재질과 공경이 서로 다른 한 외여과막을 사용하여 한외여과한 결과 Biomax 100K 막이초기 flux가 79 liter/㎡/h(LMH)로 가장 높았으며 평균 flux도 가장 우수하여 한외여과공정의 최적 한외여과막으로 선정하였다. 한외여과에 의해 복숭아주 내에 존재하는 미생물은 완벽하게 제거되었으며 탁도와 알코올 함량은 약간 감소하였으나 그 이외의 이화학적 특성은 크게 변화하지 않았다. 복숭아주를 30℃에서 12주간 저장하였을 경우 저장기간동안 미생물이 전혀 검출되지 않았으며 이화학적 특성도 변화하지 않았다. Peach wine was fermented at 25℃ for 2 weeks using Saccharomyces cerevisiae KCCM 12224, aged at 15℃ for 14 weeks, and its physicochemical and microbiological changes were investigated. The viable bacterial cell numbers, 1.4×10³ CFU/mL at the beginning of fermentation, increased to 2.8×10^6 CFU/mL after 2 weeks, but decreased to 7.0×10³ CFU/mL after 14 weeks. The viable yeast cell numbers were changed from 3.4×10² CFU/mL to 2.4×10^7 CFU/mL during fermentation, and decreased to 4.0×10⁴ CFU/mL after aging. Turbidity, total sugar content, reducing sugar content, solid content and b value of peach wine decreased during fermentation, but acidity, alcohol content, L and a value increased. Most physicochemical properties except alcohol content and reducing sugar content were not changed significantly during aging. When peach wine was filtered through 0.45 ㎛ nitrocellulose membrane followed by various ultrafiltration membranes with different molecular weight cut-off values, Biomax 100K membrane, with 79 liter/㎡/h (LMH) of initial flux, was suitable for ultrafiltration process of peach wine. These membrane filtration treatments resulted in complete removal of microorganisms and decrease in turbidity and alcohol content without changes in other chemical properties. The physicochemical properties of peach wine were not changed and any microorganisms were not found during the storage at 30℃ for 12 weeks.

자가치아 뼈 이식재의 발치와내 이식 후 골 치유 양상에 관한 연구

정재호(Jae-Ho Chung),이재훈(Jae-Hoon Lee) 대한구강악안면외과학회 2011 대한구강악안면외과학회지 Vol.37 No.5

Introduction: Research on dental bone graft material has been actively conducted. Recently, demineralized dentin matrix material has been developed and introduced. This study examined the effect of demineralized dentin matrix material on bone healing. Subjects and Methods: The patients who received no treatment after extraction were used as the control group and patients who underwent demineralized dentin matrix material application in the extraction socket after extraction were used as the experimental group. Panorama radiography was performed at the baseline and at 3.5 months after graft material placement and CT was taken at 3.5 months after graft material placement for a radiologic evaluation. Bony tissue specimens were collected from the alveolar crest in the middle of the extraction socket using a 2 mm trephine bur after 3.5 months for the histology and hostomorphometric study. Results: 1. On the panoramic view, a higher bone density was observed in the subject group. 2. On the panoramic view, the bone density increased significantly in the extraction socket, from the baseline to 3.5 months: a 7 and 10 gray-level scale was observed in the control and experimental group, respectively (P<0.05). 3. The CT view evaluation at 3.5 months revealed significantly higher bone density in the subject group than the control group (P<0.05). 4. The histological findings showed more active new bone and lamellar bone formation in the subject group. Dentin with osteoinduction ability and enamel with osteoconduction ability appeared. 5. On histomorphometric analysis, the subject group showed significantly more new bone, lamellar bone area and lower soft tissue area (P<0.05). The difference between the groups was significant (P<0.05). Conclusion: Bone healing was improved after the application of demineralized dentin matrix material and there was active new bone and lamellar bone formation.

흉강경술로 제거한 흉막지방종 1례

정재호 ( Jae Ho Chung ),문동석 ( Dong Seok Moon ),오화은 ( Hwa Eun Oh ),박찬섭 ( Chan Sup Park ),최정은 ( Jeong Eun Choi ) 대한결핵 및 호흡기학회 2005 Tuberculosis and Respiratory Diseases Vol.59 No.5

대외적 변동성충격에 대한 국면별 주택시장의 비대칭적 반응 연구

정재호(Chung, Jae-Ho),김종하(Kim, Jong-Ha) 한국부동산정책학회 2018 不動産政策硏究 Vol.19 No.1

The objective of this study was to empirically analyze the asymmetric response of the housing market to the volatility shocks. Two regimes were assumed for the analysis and the analysis period was from January 2004 to December 2017. The analysis results of the study implied that, first of all, the housing market revealed volatility clustering. In other words, it showed considerable variations over a substantially long period and maintained a relatively stable period alternately. Moreover, the results of this study confirmed that there was a GARCH effect within each regime. Secondly, the variables affecting the housing price earning rate varied by regime. The exchange rate was the main variable of this study and it was more influential in regime 2 than in regime 1. Therefore, it would be important to manage the interest rate politically when an external shock occurs. Thirdly, the mortgage interest rate had different effects on the housing market in regime 1 and regime 2. It adversely affected the housing price agreeing with the theoretical basis during regime 1. However, it had positive effects on the housing price during the regime 2, accompanying with abrupt volatility. In other words, if a volatility shock occurs in the South Korean housing market, the volume of the mortgage loan will increase even though the price is rising.