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베트남인 분변 및 김치로부터 분리된 유산균의 프로바이오틱스 기능성 연구신현수1․유성호1․
신현수,유성호,장진아,원지영,김철현 한국낙농식품응용생물학회 2017 Journal of Dairy Science and Biotechnology (JMSB) Vol.35 No.4
The purpose of this study was to investigate the probiotic properties and antioxidant capacity of lactic acid bacteria isolated from Vietnamese feces and the Korean traditional food kimchi. Six isolated strains were identified as Lactobacillus sp. by 16S rRNA sequencing. All strains showed good resistance to low pH (1.5, 2.0, and 3.0) and 0.3% oxgall bile acids. Culture filtrates from the six strains showed various antioxidant effects, including DPPH, ABTS, reducing power, and metal chelating (Fe2+) activities. Two of the six Lactobacillus strains showed potential probiotic activity. Heat resistance and adhesion assays were conducted by mixing the selected strains, Lactobacillus acidophilus V4, Lactobacillus plantarum V7, and Lactobacillus paracasei DK121 isolated from kimchi. The results showed that the heat resistance of these strains was similar to that of a commercial strain, L. plantarum LP. In addition, a mucin attachment assay using the mixture of selected strains (V4, V7, and DK121) showed high binding activity to the mucous layer. In conclusion, a mixture of V4, V7, and DK121 shows promising probiotic activity and may be useful for the development of health-related products.
사람 혈청의 Alkaline Phosphatase 에 대한 Ferrous 및 Ferric 이온과 여러 계면활성제의 영향
신현수,조기승 ( Hyun Soo Shin,Key Seung Cho ) 생화학분자생물학회 1984 BMB Reports Vol.17 No.2
Alkaline phosphatase (E.C. 3.1.3.1) of human serum was shown to have a maximum activity with glycine buffer at pH 9. 8 and had a still high activity even with low and a little high temperature of 50℃. Although the enzyme was inhibited seriously in the presence of Cu^(++) and Fe^(++) ions, other cations tested showed little inhibition or activation effects. In comparison of Fe^(++) and Fe^(+++) ion`s effect on enzyme activity, Fe^(++) ion inhibited strongly, on the other hand, the enzyme was activated meaningfully by the addition of Fe^(+++) ion. This result suggested the possibility that ferrous and ferric ions in hemoglobin and methemoglobin, respectively, could control this enzyme activity in the blood stream. In the presence of EDTA, the enzyme activity was elevated significantly with both of Fe^(++) and Fe^(++) ions by the change of preincubation conditions, but EDTA itself had a property to inhibit completely the activity. Among several detergents tested, low concentration of palmitoylcarnitine, ginseng saponin and triton X-100 stimulated significantly the enzyme activity in the experimental conditions used, but the inhibition was shown in high concentration of above detergents and sodium deoxycholate.
물체 파지점 검출 향상을 위한 분할 기반 깊이 지도 조정
신현수,무하마드 라힐 아파잘,이성온 한국로봇학회 2024 로봇학회 논문지 Vol.19 No.1
Robotic grasping in unstructured environments poses a significant challenge, demanding precise estimation of gripping positions for diverse and unknown objects. Generative Grasping Convolution Neural Network (GG-CNN) can estimate the position and direction that can be gripped by a robot gripper for an unknown object based on a three-dimensional depth map. Since GG-CNN uses only a depth map as an input, the precision of the depth map is the most critical factor affecting the result. To address the challenge of depth map precision, we integrate the Segment Anything Model renowned for its robust zero-shot performance across various segmentation tasks. We adjust the components corresponding to the segmented areas in the depth map aligned through external calibration. The proposed method was validated on the Cornell dataset and SurgicalKit dataset. Quantitative analysis compared to existing methods showed a 49.8% improvement with the dataset including surgical instruments. The results highlight the practical importance of our approach, especially in scenarios involving thin and metallic objects.