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Choi, Young Deuk,Ham, Won Sik,Kim, Won Tae,Cho, Kang Su,Lee, Joo Hyoung,Cho, Soung Yong,Seo, Ju Wan,Jin, Ok Hyun Mary Ann Liebert 2009 Journal of endourology Vol.23 No.6
<P>PURPOSE: To evaluate the efficacy and safety of single-session OK-432 sclerotherapy for the treatment of renal cysts. MATERIALS AND METHODS: From October 2005 to November 2006, 48 patients (61 simple renal cysts) were included in the study. Indications were determined as flank discomfort (n = 37) or patient reassurance due to increasing size (n = 11). The simple renal cysts were aspirated under ultrasonography (US), at which point OK-432 was injected into the cyst. Follow-up was performed with US or computed tomography scan every 3 months until 1 year. Complete regression of the renal cyst or more than 70% reduction in size with no symptoms indicated a successful treatment. RESULTS: Among 61 renal cysts of 48 patients, the overall success rate was 98.4%. Complete regression occurred in 46 cysts (75.4%), and more than 90% reduction in size occurred in 6 cysts (9.8%). A size reduction of 80% to 90% and 70% to 80% occurred in five (8.2%) and three cysts (4.9%), respectively. A size reduction less than 70% occurred in only one cyst (1.6%). The success of cyst regression was correlated with cyst volume. Clinical symptoms resolved in 100% of patients with symptomatic cysts, and there was no enlargement of the aspirated cysts at the 1-year follow-up. After the procedure, there were only some minor complications, such as mild fever, flank pain, and leukocytosis, which subsided with the conservative treatment. CONCLUSIONS: Percutaneous OK-432 sclerotherapy is simple, safe, and effective, and it can be an alternative first-line therapy for simple renal cysts.</P>
Developing a Monitoring System for Toothbrushing
Ok Su Kim,Sang Woo Kim,Ji Sun Kim,Hong Ran Choi,Ok Joon Kim 대한구강악안면병리학회 2015 대한구강악안면병리학회지 Vol.39 No.2
Proper oral hygiene is required to maintain oral health and prevent oral disease. Toothbrushing is central to proper oral hygiene. Mechanical tooth cleaning is the mainstay of plaque control. A variety of toothbrushing techniques have been developed and evaluated for their efficacy. However, these evaluations are subjective. To adequately evaluate toothbrushing objectively, a novel toothbrushing monitoring system was developed. The system involves user-monitored brushing patterns including toothbrush motions using a 3-axis gyroscope, 3-axis accelerometer, 3-axis magnetic sensor, one load-cell and Bluetooth devices. To confirm the efficacy of this toothbrushing monitoring system, eight periodontist performed tooth brushing in a dental model, and their brushing motion was monitored and recorded, and evaluated by statistical means. The proposed monitoring system can be used to aid dental care personnel in toothbrushing instruction.
Ok-Tae Kim,Kyong-Hwan Bang,Young-Chang Kim,Yu-Su Shin,Dong-Yun Hyun,Byong-Yel Yeon,Yeoung-Seuk Bae,Nak-Sul Seong,Seon-Woo Cha 한국작물학회 2007 한국작물학회 학술발표대회 논문집 Vol.2007 No.11
Objectives Here, we report the effect of overexpression of ginseng farnesyl diphosphate synthase on the transcription of three key regulatory enzymes involved in triterpene metabolism in hairy root of ginseng and Centella asiatica (L.) Urban. Materials and Methods A four-year-old root of Panax ginseng C.A. Meyer and Centella asiatica (L.) Urban whole plants were obtained from National Institute of Crop Science (Suwon, Korea) and Chonnam National University (Gwangju, Korea), respectively. Agrobacterium rhizogenes R1000 strain was kindly provided by Dr. In (Nongwoo Bio, Yeju, Korea). Results and Discussion The role of farnesyl diphosphate synthase (FPS) in triterpene biosynthesis (Fig. 1) was investigated. A pCAMBIA3101 vector was used to insert a exogenous gene into target plant genome (Fig. 2). After the transformation, we produced Panax ginseng and Centella asiatica hairy roots by introducing the coding region of the gene from Panax ginseng. In these hairy roots, integration of the transgenes into the C. asiatica nuclear genome was confirmed by PCR analysis using PgFPS (P. ginseng FPS) primers and by Southern hybridization using PgFPS-specific probe. FPS specific activity is increased 4-fold compared to controls. In RT-PCR analysis, overexpression of PgFPS in hairy roots was observed (Fig. 3) and two genes, cycloartenol and beta-amyrin synthase, related to triterpene biosynthesis were up-regulated. These results suggest that FPS overexpression might lead to an enhanced biosynthesis of triterpene saponins and phytosterols. However, we did not demonstrate whether or not the introduction of PgFPS gene in Centella asiatica genome directly enhances triterpene saponin production, although our results showed that gene expression related to triterpene saponin biosynthesis were obviously up-regulated. Therefore, additional experiments such as overexpression of FPS gene in triterpene saponin-deficient mutant plants will be required.
Su-Ok Kim,Eun Mi Bae,이예나,Joung Sik Son 대한가정의학회 2021 Korean Journal of Family Medicine Vol.42 No.3
Background: This study aimed to evaluate the association between the high risk of cardiovascular disease (CVD) and the consumption of sugar-sweetened beverages (SSBs) in Korean men. Methods: This cross-sectional study analyzed the data of 3,705 men (age 30–64 years) who participated in the 2014–2016 Korea National Health and Nutrition Examination Survey (KNHANES). SSB intake was defined as the sum of the intakes of carbonated beverages and fruit juices. Participants were categorized into study groups depending on their intake of SSBs: ≤2, 3–4, or ≥5 times per week. High CVD risk was defined as a 10-year risk of more than 10%, based on the Framingham Heart Study 10-year CVD Risk Calculator. The association between high CVD risk and SSB intake was evaluated using a multivariable-adjusted logistic regression model. Results: Korean men who consumed SSBs 3–4 and ≥5 times a week showed a multivariate-adjusted odds ratio of 1.49 (95% confidence interval [CI], 1.05–2.11) and 1.61 (95% CI, 0.97–2.67) for high CVD risk, respectively, compared with those who consumed SSBs ≤2 times per week. Additionally, the risk of CVD increased with the increase in the intake of SSBs (P-trend=0.01). In subgroup analysis, no association was observed between SSB intake and high CVD risk in the group with regular physical activity (P for interaction=0.01). Conclusion: In Korean men, except those with regular physical activity, SSB intake ≥3 times a week is associated with a high risk for CVD (10-year CVD risk ≥10%).
DEVEL OPMENT OF ULTRA-LIGHT 2 AXES SUN SENSOR FOR SMALL SATELLITE
Su-Jeoung Kim,장영근,오화석,Sun-Ok Kim,Byoung-Young Moon 한국우주과학회 2005 Journal of Astronomy and Space Sciences Vol.22 No.1
This paper addresses developmentof the ultra-lightanalog sun sensors for small satel-lite applications. The sun sensor is suitable for attitude determination for small satel-lite because of its small, light, low-cost, and low power consumption characteristics.The sun sensor is designed, manufactured and characteristic-tested with the target re-quirementsof. ..Æ FOV (Field of View) and pointingaccuracyof. .Æ . Since the sunsensor has nonlinearcharacteristics betweenoutputmeasurementvoltage and incidentangle of sunlight, a higher order calibration equation is required for error correction.The error was calculated by using a polynomial calibration equation that was com-puted by the least square method obtained from the measured voltages vs. anglescharacteristics. Finally, the accuracies of 1-axis and 2-axes sun sensors, which consistof 2 detectors, are compared.
Kim, Su Jin,Koo, Ok Jae,Kwon, Dae Kee,Kang, Jung Taek,Park, Sol Ji,Gomez, Ma Ninia,Atikuzzaman, Mohammad,Jang, Goo,Lee, Byeong-Chun Cambridge University Press 2014 Zygote Vol.22 No.2
<B>Summary</B><P>The presence of glutamine (Gln) in <I>in vitro</I> maturation (IVM) and <I>in vitro</I> culture (IVC) medium is a more potent factor for improving porcine oocyte and embryo development than other amino acids. However Gln is inherently unstable and spontaneously breaks down into ammonia, and therefore interferes with proper development. To avoid this adverse effect, Gln was replaced in the present study with its stable dipeptide derivative alanyl-glutamine (Ala-Gln) and the effects of this replacement on porcine IVM and IVC were evaluated. Replacement of Gln with Ala-Gln during IVM did not improve nuclear maturation, however numbers of early cleaved embryos were significantly increased after activation. Blastocyst formation rates were also significantly improved by using Ala-Gln during IVM. Replacement of Gln with Ala-Gln during IVC significantly increased total cell numbers in blastocysts. Blastocyst formation rate was also significantly higher when Ala-Gln was used in both IVM and IVC. In conclusion, the use of Ala-Gln rather than Gln gives better results for development in both porcine IVM and IVC.</P>
Exceptional Lithium Storage in a Co(OH)<sub>2</sub> Anode: Hydride Formation
Kim, Hyunchul,Choi, Woon Ih,Jang, Yoonjung,Balasubramanian, Mahalingam,Lee, Wontae,Park, Gwi Ok,Park, Su Bin,Yoo, Jaeseung,Hong, Jin Seok,Choi, Youn-Suk,Lee, Hyo Sug,Bae, In Tae,Kim, Ji Man,Yoon, Won- American Chemical Society 2018 ACS NANO Vol.12 No.3
<P>Current lithium ion battery technology is tied in with conventional reaction mechanisms such as insertion, conversion, and alloying reactions even though most future applications like EVs demand much higher energy densities than current ones. Exploring the exceptional reaction mechanism and related electrode materials can be critical for pushing current battery technology to a next level. Here, we introduce an exceptional reaction with a Co(OH)<SUB>2</SUB> material which exhibits an initial charge capacity of 1112 mAh g<SUP>-1</SUP>, about twice its theoretical value based on known conventional conversion reaction, and retains its first cycle capacity after 30 cycles. The combined results of synchrotron X-ray diffraction and X-ray absorption spectroscopy indicate that nanosized Co metal particles and LiOH are generated by conversion reaction at high voltages, and Co<SUB><I>x</I></SUB>H<SUB><I>y</I></SUB>, Li<SUB>2</SUB>O, and LiH are subsequently formed by hydride reaction between Co metal, LiOH, and other lithium species at low voltages, resulting in a anomalously high capacity beyond the theoretical capacity of Co(OH)<SUB>2</SUB>. This is further corroborated by AIMD simulations, localized STEM, and XPS. These findings will provide not only further understanding of exceptional lithium storage of recent nanostructured materials but also valuable guidance to develop advanced electrode materials with high energy density for next-generation batteries.</P> [FIG OMISSION]</BR>