1-Deoxynojirimycin (DNJ), an alpha-glucosidase inhibitor, has been used to prevent or treat type 2 diabetes. Low amounts of DNJ are found in mulberry leaf; however, a methodology is necessary to enhance the DNJ content of mulberry leaf extract (MLE) since increasing the amounts of DNJ is required for the prevention and treatment of type 2 diabetes. In this study, the DNJ content of MLE was increased through the optimization of the conditions for MLE fermentation by Lactobacillus plantarum SG-053, using response surface methodology (RSM). By single factor testing, the optimal conditions were identified as an inoculum concentration of 1%(v/v), an MLE concentration of 3°Bx, and no agitation. Based on a Plackett-Burman design, the following factors were considered to majorly affect the DNJ content in the MLE fermentation product: the initial pH, fermentation temperature, and fermentation time. By response surface methodology, the optimal conditions for MLE fermentation was found to have an initial pH of 5.5, a fermentation temperature of 31.9oC, and a fermentation time of 34 h. Under these optimal fermentation conditions, the DNJ content in MLE increased 3.59 times, or from 23.85 to 85.54 μg/mL.

Glucansucrase is an enzyme classified as a glycoside hydrolase (GH) 70 family, which catalyzes the synthesis of various glucans and glucooligosaccharides with a low molecular weight using sucrose as a donor of D-glucopyranose and maltose as a carbohydrate acceptor. Oligosaccharides are indigestiable carbohydrate with low calories, which have various positive effects on the health of intestinal track. In this study, oligosaccharide produced from Leuconostoc lactis CCK940 was purified and its prebiotics effect was investigated. Leuconostoc lactis CCK940 which isolated from Chinese cabbage kimchi produced oligosaccharide using 5%(w/v) sucrose as a donor and 3%(w/v) maltose as an acceptor. Oligosaccharide produced was purified using Bio-gel P2 column chromatography and DPs of the resulting oligosaccharide were ranged from 3 to 7. When the prebiotics effects of freeze dried oligosaccharide were examined, 1%(w/v) of purified oligosaccharide added to carbohydrate-free MRS showed good prebiotics effects on Lactobacillus plantarum KCCM 12116, L. reuteri KCTC40417, and Bifidobacterium animalis KCCM1209.

본 연구는 가공치즈에서 Staphylococcus aureus의 생장 을 예측하기 위한 수학적 모델을 개발하였다. 모짜렐라 슬라이스 치즈와 체다 슬라이스 치즈에 S. aureus 혼합균액 (ATCC13565, ATCC14458, ATCC23235, ATCC27664, NCCP10826) 0.1 ml (log CFU/g)을 접종한 후 4oC (1440 h), 15oC (288 h), 25oC (72 h), and 30oC (48 h)에 저장하면서 총 세균 수와 S. aureus 세균 수를 tryptic soy agar와 mannitol salt agar를 이용해 각각 확인하였다. S. aureus의 세균 수 를 Baranyi model로 분석하여 생장률(μmax; log CFU·g−1·h−1), 유도기(LPD; h), 초기 세균수(log CFU/g), 최대 생장 세균 수(log CFU/g)를 계산함으로써 1차 모델을 개발하였다. 또 한 저장온도와 S. aureus의 μmax, LPD의 관계를 분석하기 위해 square root model과 exponential decay model을 이용 하였고 이를 통해 2차모델을 개발하였으며 개발된 모델의 평균제곱근 편차(RMSE)를 계산하여 적합성을 검증하였다. 4oC에서는 모든 가공치즈에서 황색포도상구균의 생장이 관찰되지 않았으나 15oC, 25oC, 30oC에서는 모짜렐라 슬라이스와 체다 슬라이스 치즈에서 황색포도상구균이 생장 하였으며(R² = 0.785-0.996) 저장온도가 높아짐에 따라 생장률은 증가한 반면 유도기는 감소하였다(R² = 0.879-0.999). 또한 개발된 모델의 RMSE 값은 0.3500-0.5344로 적합하였다. 따라서 본 연구결과는 가공치즈에서 황색포도상구균의 생장 예측에 유용하게 사용될 것이다.

This paper examines that distributional properties of three categories of NP modifiers –color, nationality, and material- in Koren and suggests that these NP modifiers show the peculiar behaviors in the domain of modification depending on their morphology. On a par with Watanabe’s (2012) analysis, in particular, I propose in this paper that the class of adjectives that express nationality and material is absent in Korean and that modifiers that are used as nationality and material adjectives are nouns like Japanese. Regarding color adjectives, also, uniquely they can be divided into two types in their modifier form: one is the type affixed with RRC (Reduced Relative Clause) marker –n and the other is the nominal form like nationality and material modifiers. Under morpho-syntactic perspective, more significantly, I address the intriguing issue that morphological variants of these NP modifiers combined with certain morphemes have a great effect on word order restriction, and this phenomenon is discussed in relation to Pronoun-Noun Constructions (PNCs). Building on the fact verified and supported by a great deal of empirical evidence, I argue that word order restriction of Korean NP modifiers can be flexible depending on the absence/presence of their morphological variation.

The objective of this research was to understand the role of table floral decorations through the examination of the relationships that exist between satisfaction level and reuse intention which both result from one’s cognitive reactions and emotional effects from encountering table floral decorations in party catering. The survey was conducted to gather data from respondents about their cognitive reactions, emotional effects, satisfaction level, and reuse intention on table floral decorations being used as a part of party catering. The results of hierarchical multiple regression analysis between the cognitive factor and satisfaction level showed that ‘mood’ (β=0.404, p<0.001) and ‘artistry’ (β=0.288, p<0.001), among cognitive sub-factors of ‘artistry’, ‘mood’, and ‘harmony’, had large portions of positive effect on the satisfaction level, while harmony (p=0.494) did not show a significant effect on the satisfaction level. Examining the sub-factors of the emotional factor, ‘dignified’ (β=0.420, p<0.001) was shown to have a larger effect on the satisfaction level than ‘unique’ (β=0.263, p<0.001). From the Pearson correlation coefficient (r=0.827), high satisfaction level had a causal link to high reuse intention. Party catering will inevitably grow with the growth of Korea’s national income and as the leisure industry further develops, the main contribution of this research is that it provides various approaches to conducting segmented research on table floral decorations in party catering.