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Jina SON,Kei-Anne BARITUGO,Yu Jung SOHN,Kyoung Hee KANG,Hee Taek KIM,Jeong Chan JOO,Si Jae PARK 한국생물공학회 2021 한국생물공학회 학술대회 Vol.2021 No.10
Gamma-aminobutyrate (GABA) is a valuable amino-carboxylic acid that is used in food and pharmaceutical industry. Biosynthesis of GABA involves the decarboxylation of l-glutamate using glutamate decarboxylase (GAD). Thus, C. glutamicum with heterologous expression of GAD has been used for direct fermentative production of GABA from glucose. However, GABA production is not efficient since there is a significant difference between optimal pH for GAD activity (pH 4.0) and cell growth (pH 7.0). Thus, we aimed to develop recombinant C. glutamicum strains with expression of GAD from various microorganisms and compared their ability to produce GABA at near neutral pH. Here, we will present the development of metabolically engineered C. glutamicum strains for one-step fermentative GABA production from glucose at optimally balanced neutral pH.
Jina Son,Qiming Yu,Jung-Sook Seo 한국영양학회 2019 Nutrition Research and Practice Vol.13 No.1
BACKGROUND/OBJECTIVES: The aim of this study was to analyze the factors related to sarcopenic obesity among the elderly in South Korea. SUBJECTS/METHODS: A total of 3,367 elderly (≥ 65 years) from the Korea National Health and Nutrition Examination Survey (2008-2011) were included in this analysis. The subjects were assessed to determine their sarcopenia and obesity status. Sarcopenia was assessed by determining their appendicular skeletal muscle mass (ASM). Obesity was defined by the waist circumference. An association of sarcopenic obesity and the related factors was analyzed using multiple logistic regression models. RESULTS: The risk of sarcopenic obesity of the subjects was decreased by active physical activity. After adjusting for age, smoking, and alcohol consumption, the risk of sarcopenic obesity in men of the highest level group (Q4) decreased by 45% (OR = 0.550, 95% CI = 0.334-0.905, P trend 0.018) compared to that in the reference group (Q1). Among the women, the risk of sarcopenic obesity in the Q3 and Q4 groups decreased by 29.0% (OR = 0.710, 95% CI = 0.512-0,984) and 56.7% (OR = 0.433, 95% CI = 0.281-0.668), respectively, compared to that in the Q1 group (P trend < 0.001). The mean daily energy intake was higher in the non-sarcopenia group than in the sarcopenia group. The risk of sarcopenic obesity in subjects not meeting the recommended intakes of energy, riboflavin, and vitamin C increased significantly by 25.4%, and 36.6%, and 32.6%, respectively, compared to that in the subjects meeting the recommended nutrient intake. CONCLUSION: Active physical activity as well as an adequate intake of energy and some vitamins might be negatively associated with the development of sarcopenia and sarcopenic obesity in the elderly.
Jina Son,Ha I Kang,Eun young Jung,Hae won Ryu,Kyung-Ha Lee 한국임상영양학회 2023 Clinical Nutrition Research Vol.12 No.2
Patients with colorectal cancer may experience symptoms such as diarrhea, nausea, and anorexia, during surgery and chemotherapy, which can increase the risk of malnutrition. In addition, dietary habits play a key role in the onset of colorectal cancer; therefore, it is necessary to improve dietary habits to prevent recurrence during treatment after diagnosis. In this study, a clinical nutritionist conducted 4 interviews for patients diagnosed with colorectal cancer and scheduled for colectomy: before surgery, after surgery, 1st chemotherapy, and 2nd chemotherapy, and provided nutrition care for each treatment course to determine its effects on nutrition status and disease prognosis. Significant weight loss but no decrease in muscle mass was observed during treatment. Body fat mass, although not statistically significant, showed a decreasing tendency. The percentage of people who responded ‘yes’ to the below items increased after compared to before receiving nutrition education: ‘I eat meat or eggs more than 5 times a week,’ ‘I eat seafood at least three times a week,’ ‘I eat vegetables at every meal,’ ‘I eat fruits every day,’ and ‘I eat milk or dairy products every day.’ These results indicate that the patients changed their dietary habit from a monotonous eating pattern to a pattern of consuming various food groups after receiving nutrition education. These results suggest that continuous nutrition care by clinical dietitians, according to the patient’s treatment process, can help improve the patient's nutritional status and establish healthy eating habits.
Electro-holographic display using a ZBLAN glass as the image space
Son, Jung-Young,Lee, Hyoung,Byeon, Jina,Zhao, Jiangbo,Ebendorff-Heidepriem, Heike OPTICAL SOCIETY OF AMERICA 2017 Optics letters Vol.42 No.7
<P>An Er3+-doped ZBLAN glass is used to display a 360 degrees viewable reconstructed image from a hologram on a DMD. The reconstructed image, when the hologram is illuminated by a 852 nm wavelength laser beam, is situated at the inside of the glass, and then a 1530 nm wavelength laser beam is crossed through the image to light it with an upconversion green light, which is viewable at all surrounding directions. This enables us to eliminate the limitation of the viewing zone angle imposed by the finite size of pixels in electro-holographic displays based on digital display chips/panels. The amount of the green light is much higher than that known previously. This is partly caused by the upconversion luminescence induced by 852 and 1530 nm laser beams. (C) 2017 Optical Society of America</P>