Effects of Perceived Brand Localness on Consumer Purchase Intentions : the Role of Brand Authenticity

장신유,김민호 한국무역학회 2023 한국무역학회 세미나 및 토론회 Vol.2023 No.2

The impact of R&D intensity on firm performance in the short-and long-term: the moderating role of internationalization

?宸瑜(장신유) 한국무역학회 2023 한국무역학회 국제학술대회 Vol.2023 No.7

The Impact of Perceived Local Brand Identity on Consumer Purchase Intentions: Exploring the Significance of Brand Authenticity

Zhang Chenyu(장신유) 한국무역학회 2023 한국무역학회 학술대회 Vol.2023 No.4

예비동결 온도에 따른 숙지황 분말의 이화학적 특성

장귀영,박찬흠,최재훈,윤지혜,신유수,정헌상,김동휘 한국약용작물학회 2018 한국약용작물학회지 Vol.26 No.1

Background: Rehmanniae radix preparata (RRP) has been used as a traditional medicine and is one of the most important oriental herbal medicines. However, the physical characteristics of RRP are not suitable for use in industry. The present study was undertaken to determined the preparation method of RRP powder and the physicochemical characteristics of RRP powder by milling under different pre-freezing temperatures. Methods and Results: Moisture content, powder yield, particle size, bulk density, compressive stress, extraction yield, and 5-HMF content of PRR powders by milling with pre-freezing temperatures (−20, −40, −60, and −80℃) were analyzed, and correlation among these factors was determined. Powder yield increased and particle size decreased in a pre-freezing temperature-dependent manner from −20 to −60℃. The Hausner ratio increased from 1.186 to 1.225 with decreasing temperature from −20 to −80℃, whereas compressive stress showed the opposite trend. Extraction yield and 5-HMF content were not significantly different between RRP powder. Significant correlations were observed among pre-freezing temperature and physical characteristics (e.g., yield, particle size, Hausner ratio, and compressive stress). Conclusions: These results suggest that the pre-freezing temperature is an important factor affecting the physical characteristics of PRR powder and applicable to the industrial production of RRP powder.

숙성 조건에 따른 지황의 환원당 및 카탈폴 함량 변화

장귀영,정헌상,박찬흠,신유수,김동휘,최재훈 한국약용작물학회 2018 한국약용작물학술대회 발표집 Vol.2018 No.05

Background : Rehmannia glutinosa root (R. root) has been used as traditional medicine, and is important resource for natural medicines and functional foods. However, R. root have catalpol which have bitterness, and undigested sugars, including stachyose, raffinose, and verbascose as main compounds, and these compounds can cause diarrhea and abdominal pain. Therefore, this study was performed to determine the changes in reducing sugar producted from undigested sugars and catalpol contents as a bitter taste compound in R. root with aging treatment conditions. Methods and Results : R. root was treated at 10 - 70℃ for 0 - 48 h, and extracted with 50% ethanol solution. Their catalpol content was analyzed using HPLC-UVD, reducing sugar content generated from undigested sugars was measured by the Nelson-Somogyi methods, and these reaction rates were calculated from their variation according to aging time and temperature. During aging treatment, reducing sugar content increased and catalpol content decreased. Their formation and degradation rates were highest at 50℃ and 30 - 40℃, and their rates were 1.89 ㎎/g·h and 23.09 - 23.33%/h, respectively. Conclusion : These results indicated that aging treatment can positively affect the sweetness and digestibility of R. root slurry. Therefore, aging treatment could be considered for improving the sensory qualities and digestibility of R. root.

격자 해상도에 따른 EFDC의 새만금호 모의

신유리 ( Yu Ri Shin ),장정렬 ( Jeong Ryeil Jang ),최정훈 ( Jung Hoon Choi ),조영권 ( Young Kweon Cho ) 한국물환경학회 2012 한국물환경학회지 Vol.28 No.5

This study area was Saemangeum Reservoir in Korea and the applied model was Environmental Fluid Dynamics Code(EFDC). It was the same as the scenarios to the boundary and initial conditions except the resolutions of the model grids. The resolutions were about 800 and 2,000 cells. It was considered scenario 1 and 2. The model was performed to simulate the water temperature, salinity, water quality parameters such as dissolved oxygen(DO), chemical oxygen demand(COD), total nitrogen(T-N), and total phosphorus(T-P) at 2008. The simulation results of the two scenarios were reflected in the trend of observed data tolerably. However, water flow, water temperature, and salinity showed high confidence level at the scenario 1. The water quality items did not present high confidence level at the scenario 1 because which concept was considered to biochemical and physical processes. This result shows that grid resolution has an influence on the water transport and the effect is reflected directly shallow and narrow water area. But, the selection of grid resolution should be considered the purpose of model simulation and the process of target items.

간척지 논 농업배수 처리에 적합한 인공습지 설계 기법

장정렬,신유리,정지연,최강원,Jang, Jeong-Ryeol,Shin, Yu-Ri,Jung, Ji-Yeon,Choi, Kang-Won 한국관개배수위원회 2011 한국관개배수논문집 Vol.18 No.1

The standard design methodology was suggested to construct wetland system for reducing non-point source pollution from Saemangeum reclaimed paddy land. To set for the design flow and concentrations, runoff and water quality survey were conducted during the irrigation period in 2008 at Gyehwa reclaimed paddy land located at near Saemangeum lake. It is rational that 1ha is the optimum constructed wetland size. To meet this size, the moderate drainage area of reclaimed paddy field was 50ha under the conditions that rainfall is 30mm, average runoff coefficient is 0.83, and runoff capture ratio is 0.6. At these condition, the runoff volume from 50ha was 10,520 $m^3/d$ including base flow during irrigation period. To select the optimum wetland system, several case studies were conducted by focusing on the tidal reclaimed land areas having wetland systems in Seokmun. Pond-Wetland system was selected as the standard model because of showing the highest reduction efficiency. Single variable regression equation were delivered to estimate effluent water concentrations from the designed wetland by using long-term monitoring data from the Seokmun experiment site. The effluent concentration from the designed wetland using these equation were showed moderately range.

숙성처리에 따른 지황 슬러리의 환원당 및 카탈폴 변화

장귀영,김동휘,박찬흠,신유수,강태수,정헌상,최재훈,Jang, Gwi Yeong,Kim, Dong Hwi,Park, Chan Hum,Shin, Yu Su,Kang, Tae Su,Jeong, Heon Sang,Choi, Jehun 한국식품영양학회 2018 韓國食品營養學會誌 Vol.31 No.4

Rehmannia glutinosa root (R. root) has been used as an traditional medicine, and is important resource for natural medicines and functional foods. However, R. root contains catalpol which is bitter, and undigested sugars, including stachyose and raffinose, which can cause diarrhea. Therefore, this study was performed to identify the changes in reducing sugar from undigested sugars and in catalpol contents in R. root slurry induced by aging treatments. R. root slurry was treated at $10{\sim}70^{\circ}C$ for up to 72 hr; and extracted with a 50% ethanol solution. The catalpol content was analyzed using HPLC-UVD. Reducing sugar content generated from undigested sugars was measured by the Nelson-Somogyi methods, and the reaction rates were calculated from their variation according to aging time and temperature. During the aging treatment, reducing sugar increased and catalpol decreased. Their formation and degradation rates were highest at $50^{\circ}C$ and $30{\sim}40^{\circ}C$, and their rates were $2.05mg/g{\cdot}hr$ and 23.09 to 23.33%/hr, respectively. These results indicated that aging treatment can positively affect the sweetness and digestibility of R. root slurry. Therefore, an aging treatment could be considered for improving the taste and digestibility of R. root.

예비동결 온도를 달리하여 제조한 숙지황 분말의 이화학적 특성

장귀영,정헌상,박찬흠,신유수,김동휘,최재훈 한국약용작물학회 2018 한국약용작물학술대회 발표집 Vol.2018 No.05

Background : Prepared Rehmanniae root (PRR) has been used as traditional medicine, and is one of the most important oriental herbal medicines. However, physical characteristics of PRR are not suitable for use in industry. This study was performed to suggest preparation method of PRR powder, and determine the physicochemical characteristics of PRR powder with different pre-freezing temperatures. Methods and Results : Moisture content, powder yield, particle size, bulk density, compressive stress, extraction yield, and 5-HMF content of PRR powders with different pre-freezing temperatures (-20℃, -40℃, -60℃, and -80℃) were analyzed, and correlation among these factors was determined. Powder yield increased and particle size decreased in a pre-freezing temperature-dependent manner from -20℃ to -60℃. Hausner ratio increased from 1.186 to 1.225 with decreasing temperature from -20℃ to -80℃, and compressive stress showed the opposite trend. Extraction yield and 5-HMF content were not significantly different between PRR and powder. Significant correlations were observed among pre-freezing temperature and physical characteristics (yield, particle size, hausner ratio, and compressive stress). Conclusion : These results suggest that pre-freezing temperature was important factors affecting physical characteristics of PRR powder, and the results of this study are industrially applicable to production of PRR powder.

Ginsenoside Rg1 전환에 대한 에탄올 농도와 유기산의 영향

장귀영(Gwi Yeong Jang),김민영(Min Young Kim),이윤정(Yoon Jeong Lee),이상훈(Sang Hoon Lee),황인국(In Guk Hwang),최재훈(Jehun Choi),신유수(Yu Su Shin),이준수(Junsoo Lee),정헌상(Heon Sang Jeong) 한국식품영양과학회 2018 한국식품영양과학회지 Vol.47 No.8

본 연구에서는 유기산과 에탄올 농도가 인삼의 주요 사포닌인 ginsenoside Rg1의 전환에 미치는 영향을 확인하기 위하여, ginsenoside Rg1 용액에 유기산(citric acid, malic acid 및 succinic acid)과 에탄올 농도를 달리하여 130°C에서 가열 후 Rg1의 변화를 확인하였다. Ginsenoside Rg1은 증류수 조건에서는 130°C에서도 매우 안정하였으며, 유기산이 존재하는 조건에서는 minor ginsenoside로 쉽게 전환되었다. Rg1으로부터 가수분해 반응으로 C-20에 결합한 glucose가 이탈한 Rh1(S) 및 Rh1(R)이 생성되고 가수분해 된 ginsenoside로부터 탈수반응으로 C-20의 OH기가 이탈한 Rk3와 Rh4가 생성되었으며, ginsenoside Rg1의 전환반응은 유기산의 종류와 농도 및 에탄올 농도에 의존적이었다. 또한, Rg1과 Rg1으로부터 생성되는 ginsenoside, 유기산, 에탄올 및 가열시간 간에 유의적인 상관관계를 나타내었다. 이러한 결과는 인삼의 추출용매로서 흔히 사용되는 에탄올이 가열과정에서 ginsenoside의 전환에 많은 영향을 미칠 있으며, 에탄올 농도의 조절이 인삼가공품의 품질지표성분인 ginsenoside 조성을 조절하는 데 활용될 수 있을 것으로 판단된다. This study was performed to determine the influence of ethanol concentration and organic acids on conversion of ginsenoside Rg1 under heating. Ginsenoside Rg1 solution was treated with various ethanol concentrations (0∼50%) and organic acids (0∼3 mM of citric acid, malic acid, and succinic acid) at 130°C, then analyzed using a HPLC-UVD. The ginsenoside Rg1 was highly stable at 130°C in distilled water, whereas Rg1 was readily converted to minor ginsenosides, including Rh1(S), Rh1(R), Rk3, and Rh4 in distilled water with organic acids. The conversion ratio of ginsenosides increased with increasing acid concentration and heating time, whereas it decreased when ethanol concentration increased. The conversion level of Rg1 differed according to types of organic acids. The independent variables (heating time, organic acid, and ethanol concentration) were significantly correlated with ginsenoside conversion (P<0.001). Taken together, these results indicate that the ginsenoside conversion level differed according to ethanol concentration under the same conditions. Therefore, ethanol could be used as a regulator for the conversion of ginsenosides during ginseng extraction and processing.