삼투압을 이용한 경구용 방출제어형 약물 전달 시스템

트란 티탄 휘엔,황성주 충남대학교 생물공학연구소 2005 생물공학연구지 Vol.11 No.2

Osmotically drug delivery systems utilize osmotic pressure as driving force for controlled delivery of drugs. The release of drug from these systems is independent of the physiological factors of the gastrointestinal tract (GI) to a large extent. Different types of osmotically controlled oral drug delivery systems (OROS) were present in a number of patents. Because patents are hard to read, to analyze, and to judge due to the different styles in which they are written. This review analyzes U.S. patents on OROS, different types of OROS with advantages, limitations and applications are discussed.

Factors Affecting Enterprise's Satisfaction toward Social Security's Online Public Service: The Case of Thanh Hoa Province, Vietnam

NGO, Chi Thanh,NGUYEN, Thi Ngoc Mai,NGUYEN, Duy Dat,LE, Hoang Ba Huyen,LE, Van Cuong,LE, Thi Binh Korea Distribution Science Association 2020 The Journal of Asian Finance, Economics and Busine Vol.7 No.9

The study aims to investigate factors affecting enterprise's satisfaction and loyalty toward the Social Security's online public services, looking at the case of Thanh Hoa province, Vietnam. This study employs samples with 216 enterprises that use online public system of Thanh Hoa province's Social Security. The research model is closely linked to the SERVQUAL model developed by Parasuraman, Zeithaml and Berry (1988). We propose 23 scales that constitute the quality of service, three scales that constitute Customer Satisfaction and three components that constitute Customer Loyalty. This study use the tool of Exploratory Factor Analysis (EFA), Cronbach's Alpha test, Confirm Factor Analysis (CFA) and Structural Equation Modeling (SEM) in order to address the question of satisfaction and loyalty. The result shows that the factor with the most impact is Reliability, next is Capacity of staffs, Tangibles, Attitude of staffs, and the least impacting factor is Empathy; moreover, the results also show that Satisfaction has a strong impact on Customer Loyalty. The findings of this study suggest that Thanh Hoa province's Social Security should: (i) strengthen the reliability of online service system; (ii) build capacity for staffs; (iii) develop the responsiveness of electronic transactions systems; and (iv) improve the empathy of staffs.

Factor Affecting Customers' Decision to Use Mobile Banking Service: A Case of Thanh Hoa Province, Vietnam

LE, Hoang Ba Huyen,NGO, Chi Thanh,TRINH, Thi Thu Huyen,NGUYEN, Thi Thu Phuong Korea Distribution Science Association 2020 The Journal of Asian Finance, Economics and Busine Vol.7 No.2

The article aims to identify the main factors affecting customers' decision to use mobile banking service in Vietnam, a case study in Thanh Hoa province. Based on theoretical frameworks of the Technology Acceptance Model (TAM) and the Unified Theory of Acceptance and Use of Technology (UTAUT), the study has been conducted with 370 questionnaires to consumers who have not yet used and are currently using mobile banking in Thanh Hoa province. The research results indicates that several factors have been evaluated to be more important than others, of which, the social influence is the strongest, the second is the compatibility and some others factors such as perceived ease of use, perceived trust, etc., all affecting the intention to use mobile banking in Thanh Hoa. Based on these important results, the article propose a number of recommendations: (i) Exploiting the advantages of social influence on the increase of intention to use; (ii) Increasing compatibility and minimizing costs for customers when they use Mobile Banking; (iii) Developing a strategy to increase the users' perceived ease of using banking services; (iv) Issuing a policy on increasing the security of Mobile Banking system to meet customers' needs; and (v) Developing an individual customer management system to improve service quality.

Ionic Liquid-assisted Separation of Carbohydrates from Lignocellulosic Biomass

Huyen Thanh Vo,김창수,Sang Deuk Lee,이현주 대한화학회 2016 Bulletin of the Korean Chemical Society Vol.37 No.8

To utilize carbohydrates in lignocellulosic biomass, a fractionation of lignocellulose is crucial. In this study, poplar wood sawdust was treated with a mixture of ionic liquids, 1-butyl-3-methylimidazolium acetate ([Bmim][OAc]) and 1,3-dimethylimidazolium methyl phosphite ([Dmim][MeO(H)PO2]), to separate carbohydrate and lignin components from wood. Three types of product were isolated: water-soluble wood (WSW), water-insoluble wood (WIW), and wood in ionic liquids (WIL). At a dissolution temperature of 130°C for 18 h, WSW was found to have high carbohydrate and low lignin contents of 81.0 and 3.5%, respectively, corresponding to a delignification efficiency of 88.9%. WIW isolated under the same condition was found to have 55% of the lignin of native poplar. However, with an increase in the dissolution temperature and the time, the yield of WIL increased due to the increased phosphorylation in both carbohydrate and lignin, forming a mixture of carbohydrate and lignin having phosphorylated ionic functional groups.

Preliminary Imaging Analysis for Enhanced Intestinal Uptake of Non-soluble Polystyrene Microspheres in the Presence of Oleic Acid using Rat Intestine

Huyen Thi Thanh Tran,Phuong Ha Lien Tran,Thao Truong Dinh Tran,Kyung Ho Lee,Beom Jin Lee 韓國藥劑學會 2009 Journal of Pharmaceutical Investigation Vol.39 No.3

Reversible absorption of SO2 with alkyl-anilines: The effects of alkyl group on aniline and water

Huyen Thanh Vo,조신혜,이웅,제정호,김홍곤,이현주 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.69 No.-

SO2 absorption behaviours of N,N-dimethylaniline (DMA), N,N-diethylaniline (DEA), N,N-dibutylaniline (DBA), and N-methyldiphenylamine (MDPA) — were investigated in dry and wet conditions. DMA showed the highest SO2 absorption capacity of 1.5 molSO2 molAbsorbent−1 in dry condition, while DBA showed the highest capacity of 1.75 molSO2 molAbsorbent−1 in wet condition. Raman analyses revealed that anilines captured SO2 by forming charge transfer complexes in dry condition and the interaction between SO2 and aniline decreased as the steric hindrance of alkyl aniline increased. In contrast, bisulfite-based acid-base salt was formed in the presence of water, and the capacity increased with an increasing basicity of the alkyl aniline.

Equilibrium Adsorption Isotherms of Ammonia Gas on Mesoporous Alumina

( HUYEN THANH VO ),김민기,주지봉,박일건 한국공업화학회 2018 한국공업화학회 연구논문 초록집 Vol.2018 No.1

Preparation of Mesoporous Alumina for Removing Ammonium Nitrogen in Aqueous Solution

( Huyen Thanh Vo ),김민기,주지봉 한국공업화학회 2018 한국공업화학회 연구논문 초록집 Vol.2018 No.0

The study on removal of ammonium nitrogen (NH₄-N), a toxic element damaged to living bodies in water, has received great attention in recent years. In this study, we synthesized Ordered Mesoporous Alumina (OMAs) with different pore structures by Evaporation Induced Self Assembly (EISA) method and investigated adsorption performances for removal of ammonium ions in aqueous solution. The physical properties of OMAs were controlled by adjusting acid concentrations and heat treatment conditions. Furthermore, OMAs were functionalized by using chemicals containing phosphoric, sulfuric, and carboxylic acid groups to tune the acidity. In the adsorption experiments, the effects of adsorbent amount, ammonium concentration, reaction temperature and time were optimized. The prepared OMAs showed high surface area with uniform pore diameter and the enhanced physical/chemical properties for the removal of ammonium nitrogen from aqueous solution as compared to the commercial alumina oxides.

Internal Factors Influencing Firm Profitability in the COVID-19 Pandemic: An Empirical Evidence from Vietnam

HUYEN, Le Thanh Korea Distribution Science Association 2022 The Journal of Asian Finance, Economics and Busine Vol.9 No.8

For each country, the growth of the country is significantly associated with the growth of the manufacturing industry. Especially in the early stages of development, the manufacturing industry has greatly played a great role in creating great added value for society and economic development in that country. Starting from a country with a weak manufacturing background, Vietnam is gradually opening up and integrating into the global economy, which has brought many opportunities for manufacturing enterprises in particular and the enterprise community in general, making Vietnam one of the countries with large production activities in Southeast Asia and Asia. The study evaluates the factors affecting the financial performance of manufacturing enterprises through a case study in Hanoi, Vietnam. Using a survey sample of 235 enterprises operating in production and using quantitative analysis methods, the research results show that: Enterprises with high governance quality are enterprises with high economic efficiency or enterprises with low management capacity have low business efficiency. Moreover, large-scale enterprises often have many advantages in seeking profits and improving business efficiency. Finally, the study has some recommendations to improve corporate governance and growth, create a stronger business community and contribute more to Vietnam's economic development.

A Study on the Structural Relation of Vietnamese Consumer’s Green Purchase Behavior

Thanh Huyen,Park, Ju-Sik 대한경영정보학회 2016 경영과 정보연구 Vol.35 No.3

본 연구는 베트남 소비자의 그린구매행동에 관한 구조적 모형과 구매능력이 가지는 조절효과를 중점적으로 살펴본 연구이다. 베트남의 중산층 인구는 2012년 12백만 명에서 2020년에는 33백만 명으로 증가할 것으로 예상되고 이에 따른 소비패턴 변화가 예상되고 있으며, 최근 산업화와 내구재 소비증가로 인해 환경문제에 대한 관심이 증가하고 있다(Koning et al., 2016). 이에 따라 그린 제품구매 관련 문헌고찰을 통해 베트남 소비자들의 그린 구매행동 관련 가설 및 모형을 제시하고 실증 자료를 통해 가설을 검증하였다. 연구모형을 검증하기 전에 측정문항의 신뢰성과 타당성분석을 실시하였으며 연구변수간 선․후행 관계검증을 위해 구조방정식 모형분석을 실시하였고 구매능력의 조절효과검증은 개별모수 차이검증을 통해 실시되었다. 실증분석결과는 다음과 같다. 먼저 생태적 관심과 집단주의는 그린구매행동에 관한 태도에 긍정적인 영향을 미치는 것으로 나타났으나 생태적 지식은 유의한 영향을 미치지 않았다. 둘째, 그린구매행동에 대한 태도는 그린구매행동의도에, 그린구매행동의도는 그린구매행동에 유의한 영향을 미치는 것으로 나타나 계층적 효과모형과 일관된 결과를 보여주었다. 셋째, 구매능력은 구매의도와 실제 구매행동 간의 관계를 조절하는 것으로 나타났다. 이러한 연구결과에 기반하여 이론적, 실무적 시사점을 제시하였다. This research suggests a structural model of green purchase behavior, focusing on the moderating effect of affordability. Affordability means buying power or ability to buy products. Based on the literature review, a research model of behavior of buying green products was proposed and tested empirically using the field study. To examine the proposed research model, the reliability and validity verifications on measurement items were carried out and then the structural equation model analysis was applied to test the model. Lastly, to test the moderating effect of affordability, a two-group model(using Amos program) was used subsequently so that it could be determined whether or not there was any significant difference in structural parameters between the high affordability group and the low affordability group. The empirical results are as follow: Firstly, green purchase attitude is influenced by ecological concern and collectivism, then green purchase attitude has an impact on green purchase intention, and in turn, green purchase intention affects green purchase behavior. Secondly, affordability significantly moderates the relationship between green purchase intention and green purchase behavior. These results are consistent with the past researches and based on them, some managerial implications are given.