• Microbiology and Biotechnology Letters
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• v.23 no.6
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• pp.659-664
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• 1995

To improve stability of recombinant DNA pLC1 encoding endoglucanase gene and pGL1 encoding $\beta $-glucosidase gene, DNA fragments of genes coding endoglucanase and $\beta $-glucosidase were cloned within the recA gene on a pDR1453, and the pDRE10 and pDRG20 of recombinant plasmids were integrated into the recA gene on the E. coli 1100 chromosomal DNAs. The stability of inheritance was completely maintained in E. coli 1100; Transformants E. coli 1100/pDREIO and pDRG20 were expressed well by recA promoter and increased endoglucanase and $\beta $-glucosidase activities. This method can be used as a model to improve the stability of recombinant plasmid in large scale culture.

• Communications of the Korean Mathematical Society
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• v.33 no.3
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• pp.787-798
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• 2018

For $1{\leq}p{\leq}{\infty}$, let $H^p$ be the usual Hardy space on the unit circle. When ${\alpha}$ and ${\beta}$ are bounded functions, a singular integral operator $S_{{\alpha},{\beta}}$ is defined as the following: $S_{{\alpha},{\beta}}(f+{\bar{g}})={\alpha}f+{\beta}{\bar{g}}(f{\in}H^p,\;g{\in}zH^p)$. When p = 2, we study the hyponormality of $S_{{\alpha},{\beta}}$ when ${\alpha}$ and ${\beta}$ are some special functions.

• Journal of the Korean Society of Food Science and Nutrition
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• v.36 no.2
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• pp.180-185
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• 2007

This study demonstrates that pork cholesterol levels are reduced in fattening stage swine fed $\beta-cyclodextrin({\beta}-cyclodextrin)$. The study subjects were 120 swine fed their respective chow diets containing 0, 5, 7, or 10% $\beta$-cyclodextrin for 35 consecutive days. Plasma total lipids, triglyceride and total cholesterol of the $\beta$-cyclodextrin treated group were significantly lower than those of the control group (p<0.05). The levels of plasma lipid were significantly decreased by 63.22 mg, 73.98 mg, and 82.12 mg in the fattening swine group fed $\beta$-cyclodextrin at 5%, 7%, and 10%, respectively, compared to those in the control group (p<0.05). When 5, 7, and 10% $\beta$-cyclodextrin was administered to fattening swine, the triacylglyceride levels were decreased by 56.24 mg, 55.48 mg, and 60.02 mg, and total cholesterol concentration was reduced by 25.05 mg, 27.17 mg, and 30.19 mg, respectively, compared to those in the control group (p<0.05). Excretion of total steroid significantly (p<0.05) increased with the increasing amount of $\beta$-cyclodextrin supplementation. The cholesterol levels of swine back fat, belly, loin, and ham were significantly decreased with increasing $\beta$-cyclodextrin supplementation (p<0.05). The pork cholesterol was significantly (p<0.05) reduced by 15.31% in the $\beta$-cyclodextrin treated group, compared to that of the control group. These results suggest that feeding $\beta$-cyclodextrin to fattening swine may produce novel functional pork with low cholesterol levels.

• Culinary science and hospitality research
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• v.22 no.7
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• pp.148-157
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• 2016

This study verified the effects of the quality characteristics of dessert cafes by business start-ups according to dietary life styles of consumer. Data was collected over 15 days starting from April 15, 2016 from 218 customers who visited dessert cafes. In brief, the research results are as follows. First, in order to verify the influence of service quality of dessert cafes according to dietary life styles, 3-kinds of variables, namely taste-pursuing type, convenience-pursuing type, and health-pursuing type, were set up for the lower variables, and 2-kinds variables, specifically credibility and sympathy, were established for service quality as dependent variables. The results of the regression analysis showed that, taste-pursuing type (${\beta}=.371$, p<.001), convenience-pursuing type (${\beta}=.401$, p<.001), health-pursuing type (${\beta}=.474$, p<.001), all 3-kinds of dietary life style, had a significant, positive(+) corelation ton the credibility of service quality. in addition, regression analysis revealed that the sympathy type of service credibility and, all 3 dietary lifestyle types, taste-pursuing type (${\beta}=.145$, p<.001), convenience-pursuing type (${\beta}=.208$, p<.001), health-pursuing type (${\beta}=.236$, p<.001), showed a significant, positive (+) corelation. Second, as a result of verifying the effects of service quality on customer consuming behaviors at dessert cafes, it was determined that there was a significant, positive (+) corelation with credibility and sympathy in consuming behaviors such like credibility (${\beta}=.313$, p<.001), sympathy (${\beta}=.228$, p<.001).

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.3
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• pp.1632-1640
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• 2014

This study was conducted to investigate the factors affecting smartphone addiction of university students and to provide the data for developing intervention program of smartphone addiction prevention. The data were collected from 354 university students and analyzed with t-test and multiple regression by using SPSS 18.0 program. The smartphone addiction rate was 27.4%, which the high risk group rate was 6.2% and potential risk group rate was 21.2%. The significant factors of smartphone addiction were gender(${\beta}=0.149$, p<.001), average daily using time in week(${\beta}=0.292$, p=.001), average daily using time in weekend(${\beta}=0.390$, p<.001), wrist pain in using smartphone(${\beta}=0.148$, p<.001), accident in using smartphone(${\beta}=0.133$, p=.002), sociality(${\beta}=-0.099$, p=.029), impulsiveness(${\beta}=0.211$, p<.001), SNS addiction(${\beta}=0.376$, p<.001). And these factors explained 43.3% of the variance in smartphone addiction. In conclusion, the results from this study indicated a need to develop the intervention program to prevent smartphone addiction considering these factors affecting smartphone addiction.

• Bulletin of the Korean Mathematical Society
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• v.56 no.5
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• pp.1117-1127
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• 2019

Let ${\mathcal{L}}_2=(-{\Delta})^2+V^2$ be the $Schr{\ddot{o}}dinger$ type operator, where nonnegative potential V belongs to the reverse $H{\ddot{o}}lder$ class $RH_s$, s > n/2. In this paper, we consider the operator $T_{{\alpha},{\beta}}=V^{2{\alpha}}{\mathcal{L}}^{-{\beta}}_2$ and its conjugate $T^*_{{\alpha},{\beta}}$, where $0<{\alpha}{\leq}{\beta}{\leq}1$. We establish the $(L^p,\;L^q)$-boundedness of operator $T_{{\alpha},{\beta}}$ and $T^*_{{\alpha},{\beta}}$, respectively, we also show that $T_{{\alpha},{\beta}}$ is bounded from Hardy type space $H^1_{L_2}({\mathbb{R}}^n)$ into $L^{p_2}({\mathbb{R}}^n)$ and $T^*_{{\alpha},{\beta}}$ is bounded from $L^{p_1}({\mathbb{R}}^n)$ into BMO type space $BMO_{{\mathcal{L}}1}({\mathbb{R}}^n)$, where $p_1={\frac{n}{4({\beta}-{\alpha})}}$, $p_2={\frac{n}{n-4({\beta}-{\alpha})}}$.

• Journal of Korean Academy of Fundamentals of Nursing
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• v.25 no.1
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• pp.68-77
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• 2018

Purpose: The aim of this study was to establish a hypothetical model on silence regarding patient safety and to verify the model's goodness of fit and hypotheses. Methods: The participants in this study were 330 registered nurses working in tertiary hospitals with over 300 beds. Data were collected between July 1, and August 30, 2017, from nurses who agreed to participate. A covariance structure analysis was performed. Results: The model of fit index was $x^2=59.54$, normed $x^2=2.29$, GFI=.97, AGFI=.93, SRMR=.05, NFI=.99, CFI=.95 and RMSEA=.05. The organizational culture had an influence on patient safety motivation (${\beta}=.26$, p=.003) and attitude (${\beta}=.43$, p<.001). RN-MD collaboration had an influence on patient safety motivation (${\beta}=.33$, p<.001), attitude (${\beta}=.35$, p<.001), and patient safety silence (${\beta}=-.17$, p=.026). Supervisory trust had an influence on patient safety motivation (${\beta}=.26$, p<.001), attitude (${\beta}=.12$, p=.036), and patient safety silence (${\beta}=-.23$, p=.002). Patient safety motivation had an influence on patient safety silence (${\beta}=-.33$, p=.006). The model of patient safety silence explained 36.0% of the variances. Conclusion: This study is meaningful in that it provides basic data for nursing education and program development for rejecting patient safety silence.

• Journal of the Korean Chemical Society
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• v.17 no.5
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• pp.363-370
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• 1973

The rate constants of the nucleophilic addition of n-propyl-mercaptan to $\alpha$-cyano-$\beta$-piperonylacrylic acid were determined at various pH and a rate equation which can be applied over wide pH range is obtained. The rate equation reveals that below pH 4.5 the reaction is initiated by the attack of n-propylmercaptan to $\alpha$-cyano-$\beta$-piperonylacrylic acid. At pH 4.5~6.5, however, n-propylmercaptan is added to $\alpha$-cyano-$\beta$-piperonylacrylate ion; at pH 7.04~9.5 the competitive reaction between n-propylmercaptan and n-propylmercaptide ion is anticipated to occur. Above pH 10 the addendum is n-propylmercaptide ion and the acceptor is $\alpha$-cyano-$\beta$-piperonylacrylate ion.

• Applied Biological Chemistry
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• v.46 no.4
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• pp.299-304
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• 2003

A strain YB-9 was isolated from soil as a producer of the extracellular ${\beta}-D-galactosidase$, which catalyzes the hydrolysis of lactose. The strain YB-9 was identified as Streptomyces sp. on the basis of its cultural, morphological and physiological properties. After treating culture supematant of the isolate with ammonium sulfate $(15{\sim}70%)$, the precipitated protein was used as a crude ${\beta}-galactosidase$ for analyzing its reaction properties with $para-nitrophenyl-{\beta}-D-galactoside$ $(pNP-{\beta}Gal)$ and lactose as substrates. The {\beta}-galactosidase showed its maximal activity at pH $6.0{\sim}6.5$ and $60^{\circ}C$. The hydrolyzing activity of ${\beta}-galactosidase$ for both $pNP-{\beta}Gal$ and lactose was decreased by galactose. Its hydrolyzing activity for lactose was slightly decreased by glucose, but the activity for $pNP-{\beta}Gal$ was increased to 1.3-folds by glucose. Especially, its hydrolyzing activity was not affected for lactose and was increased to 1.6-folds for $pNP-{\beta}Gal$ by xylose.

• Industry Promotion Research
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• v.2 no.1
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• pp.85-91
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• 2017

This study analyzed the effect of NCS - based education and training of small and medium manufacturing on job performance. The results of this study were as follows: First, the effects of NCS education and training on job performance(p<.001, ${\beta}=5.130$) were analyzed. As a result, (p<.01, ${\beta}=3.783$) and on-the-job training had a significant effect on job attitude (p <.05, ${\beta}=-2.448$). (P <.01, ${\beta}=.740$), job skill and collective education (p <.01, ${\beta}=.459$), and job skill (P <.01, ${\beta}=.575$), job attitude and field training (p <.05, ${\beta}=-.320$), collective education and field training (p < .268) were found to be correlated. Third, the analysis of the effect of the age of general characteristics on job attitude showed that the fifties (3.75) had higher attitude than the 20s (3.44), 30s (3.26) and 40s (3.63). The purpose of this study is to investigate the effect of NCS - based education and training on the job performance of small and medium manufacturing industries.