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Search Results: 1 - 10 of 40908 matches for " Su Na Kim "
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Liposarcoma of the Testis and Spermatic Cord  [PDF]
Ha Na Lee, Min Su Kim
Open Journal of Urology (OJU) , 2013, DOI: 10.4236/oju.2013.32013
Abstract:

Primary liposarcoma of the spermatic cord is rare, and preoperative diagnosis is difficult. We report a rare case of well-differentiated liposarcoma in 65-year-old man. The patient’s chief complaint was painless enlargement of a mass in the right inguinal area that had persisted for about two months. The main component of the mass was wrapped around the spermatic cord and several components were around the testis. Ultrasonography of the main component showed mixed echogenicity. CT showed an ovoid fat-containing nodule and several other fat-density masses surrounding the testis. The mass was surgically removed, along with the right testis and spermatic cord. A pathological examination showed a well-differentiated liposarcoma of the right spermatic cord and testis.

Ageing-Related Features of Hair and Scalp in Chinese Women by Clinical Evaluation Study  [PDF]
Sehyun Kim, Su Na Kim, Susun An, Jae Ho Yeon, Xuemin Wang, Li Li, Wei Lai, Hong Liang, Xinghua Gao, Wei Liu, Won Seok Park, Yongjoo Na
Journal of Cosmetics, Dermatological Sciences and Applications (JCDSA) , 2017, DOI: 10.4236/jcdsa.2017.73023
Abstract: There are previous studies of ageing hair and scalp in Caucasians and some Asians, such as Koreans and Japanese. However, the characteristics of scalp and hair have not yet been studied in Chinese, the largest population in the world, especially in terms of ageing. The purpose of this study is to investigate ageing features in Chinese women’s hair and scalp. Methods: In total, 1343 women in China aged 20 to 65 participated in this research. Hair density and diameter were measured and analysed with Folliscope®. Hair color and scalp conditions such as dandruff and erythema were evaluated through microscopic images. Measuring equipment was also used to detect scalp water content, barrier function and sebum secretion. Results: Hair density decreased gradually with ageing, while hair diameter peaked at 40s. The color of hair became bright with ageing because of gray hair and color fading. The degree of scalp sebum and dandruff was higher at younger ages. Interestingly, scalp erythema became more severe with ageing. Conclusion: This study shows the physical and physiological changes of Chinese womens hair and scalp. Most aging features (hair diameter, scalpsebum contents, dandruff and erythema) were noticeable in their 40s, but hair density began to decline in their 30s. This first study of aging hair and scalp in Chinese women would
Use of the foraging area by captive bred oriental storks (Ciconia boyciana) in a closed semi natural paddy field
Jongmin Yoon,Sang-Hee Na,Su-Kyung Kim,Shi-Ryong Park
Journal of Ecology and Field Biology , 2012,
Abstract: Rice paddy fields have been recognized as an alternative habitat for avian wetland foragers, and fish-rice farms havebecome a new tool in improving the abundance of aquatic animals. However, the use of the habitats by avian foragers,particularly by oriental storks (Ciconia boyciana), was not well understood. In the present study, we investigated how afish-rice farm influenced the abundance of aquatic animals and documented the foraging behavior of the two captivebred oriental storks in a closed semi-natural paddy field. Our results showed that the fish refuge pond (water depth 40cm) had a higher abundance of fish whereas the areas planted with rice (water depth 20 cm) had more tadpoles and someaquatic insects. The two captive bred oriental storks captured mostly fish and aquatic insects in the rice-planted area andmostly fish in the fish refuge pond. The two oriental storks had higher foraging success and spent more time for foragingin the rice-planted area than in the fish refuge pond. This result suggests that the oriental storks might prefer foraging inthe area with fish, aquatic insects, and amphibians under a greater success rate presumably due to shallow water depthin the paddy fields with a fish-rice farm.
Alpha-Fetoprotein, Identified as a Novel Marker for the Antioxidant Effect of Placental Extract, Exhibits Synergistic Antioxidant Activity in the Presence of Estradiol
Hye Yeon Choi, Seung Woo Kim, BongWoo Kim, Hae Na Lee, Su-Jeong Kim, Minjung Song, Sol Kim, Jungho Kim, Young Bong Kim, Jin-Hoi Kim, Ssang-Goo Cho
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0099421
Abstract: Placenta, as a reservoir of nutrients, has been widely used in medical and cosmetic materials. Here, we focused on the antioxidant properties of placental extract and attempted to isolate and identify the main antioxidant factors. Porcine placental extracts were prepared through homogenization or acid hydrolysis, and their antioxidant activity was investigated in the human keratinocyte HaCaT cell line. Treatment with homogenized placental extract (H-PE) increased the cell viability of H2O2-treated HaCaT cells more than two-fold. H-PE treatment suppressed H2O2-induced apoptotic and necrotic cell death and decreased intracellular ROS levels in H2O2-treated HaCaT cells. The antioxidant factors in H-PE were found to be thermo-unstable and were thus expected to include proteins. The candidate antioxidant proteins were fractionated with cation-exchange, anion-exchange, and size-exclusion chromatography, and the antioxidant properties of the chromatographic fractions were investigated. We obtained specific antioxidant fractions that suppressed ROS generation and ROS-induced DNA strand breaks. From silver staining and MALDI-TOF analyses, alpha-fetoprotein (AFP) precursor was identified as a main marker for the antioxidant effect of H-PE. Purified AFP or ectopically expressed AFP exhibited synergistic antioxidant activity in the presence of estradiol. Taken together, our data suggest that AFP, a serum glycoprotein produced at high levels during fetal development, is a novel marker protein for the antioxidant effect of the placenta that exhibits synergistic antioxidant activity in the presence of estradiol.
A Case of Right Paratracheal Ectopic Thyroid, Mimicking Metastasis on CT and 18F-FDG PET CT  [PDF]
Su Young Kim
Open Journal of Medical Imaging (OJMI) , 2013, DOI: 10.4236/ojmi.2013.33012
Abstract:

Mediastinal ectopic thyroid is quite rare, occurring in less than 1% of all ectopic thyroids. Frequent location of mediastinal ectopic thyroid in reported cases is anterosuperior mediastinum. CT findings of ectopic thyroid can be various and are dependent on several factors, such as its iodine content, the extent of tissue degeneration, and the presence of colloid cysts. This is a case of right paratracheal ectopic thyroid with nodular hyperplasia, mimicking metastatic nodal mass on both CT and 18F-FDG PET CT in a patient with colon cancer.

Rational and Evolutionary Engineering Approaches Uncover a Small Set of Genetic Changes Efficient for Rapid Xylose Fermentation in Saccharomyces cerevisiae
Soo Rin Kim, Jeffrey M. Skerker, Wei Kang, Anastashia Lesmana, Na Wei, Adam P. Arkin, Yong-Su Jin
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0057048
Abstract: Economic bioconversion of plant cell wall hydrolysates into fuels and chemicals has been hampered mainly due to the inability of microorganisms to efficiently co-ferment pentose and hexose sugars, especially glucose and xylose, which are the most abundant sugars in cellulosic hydrolysates. Saccharomyces cerevisiae cannot metabolize xylose due to a lack of xylose-metabolizing enzymes. We developed a rapid and efficient xylose-fermenting S. cerevisiae through rational and inverse metabolic engineering strategies, comprising the optimization of a heterologous xylose-assimilating pathway and evolutionary engineering. Strong and balanced expression levels of the XYL1, XYL2, and XYL3 genes constituting the xylose-assimilating pathway increased ethanol yields and the xylose consumption rates from a mixture of glucose and xylose with little xylitol accumulation. The engineered strain, however, still exhibited a long lag time when metabolizing xylose above 10 g/l as a sole carbon source, defined here as xylose toxicity. Through serial-subcultures on xylose, we isolated evolved strains which exhibited a shorter lag time and improved xylose-fermenting capabilities than the parental strain. Genome sequencing of the evolved strains revealed that mutations in PHO13 causing loss of the Pho13p function are associated with the improved phenotypes of the evolved strains. Crude extracts of a PHO13-overexpressing strain showed a higher phosphatase activity on xylulose-5-phosphate (X-5-P), suggesting that the dephosphorylation of X-5-P by Pho13p might generate a futile cycle with xylulokinase overexpression. While xylose consumption rates by the evolved strains improved substantially as compared to the parental strain, xylose metabolism was interrupted by accumulated acetate. Deletion of ALD6 coding for acetaldehyde dehydrogenase not only prevented acetate accumulation, but also enabled complete and efficient fermentation of xylose as well as a mixture of glucose and xylose by the evolved strain. These findings provide direct guidance for developing industrial strains to produce cellulosic fuels and chemicals.
Liver abscess and sepsis with Bacillus pantothenticus in an immunocompetent patient: A first case report
Jung Sik Na, Tae Hyung Kim, Heung Su Kim, Sang Hyun Park, Ho Sup Song, Sang Woo Cha, Hee Jung Yoon
World Journal of Gastroenterology , 2009,
Abstract: Bacillus species are aerobic, gram-positive, spore forming rods that are usually found in the soil, dust, streams, and other environmental sources. Except for Bacillus. anthracis (B. anthracis), most species display low virulence, and only rarely cause infections in hosts with weak or damaged immune systems. There are two case reports of B. cereus as a potentially serious bacterial pathogen causing a liver abscess in an immunologically competent patient. We herein report a case of liver abscess and sepsis caused by B. pantothenticus in an immunocompetent patient. Until now, no case of liver abscess due to B. pantothenticus has been reported.
Fault Location Method and Simulation Analysis of Parallel Compensating Capacitors  [PDF]
Daquan Du, Na Zheng, Zhiming Su
Energy and Power Engineering (EPE) , 2013, DOI: 10.4236/epe.2013.54B111
Abstract:

At present, the operational parallel compensating capacitors can only through the protection action for the information, so we can‘t location the fault capacitor. In order to obtain every parallel capacitor running status information and meanwhile according to internal structure and the operation mode of film capacitor, this paper established the physical model on the single capacitor and the capacitors and simulated different forms of capacitor fault model and calculated currents changes which flow through the capacitor in every group. According to the above situation, we established fault criterion matrix of capacitors. The simulation results show that the fault criterion matrix can reflect capacitor running state information accurately, and it positioned fault capacitor effectively.

Photomapping Using Aerial Vehicle
Su Kim
Computer Science , 2014,
Abstract: Creating a photomap plays a critical role in navigation. Therefore, flying vehicles are usually used to create topdown maps of the environment. In this report we used two different aerial vehicles to create a map in a simulated environment
Feedback Control Variables Have No Influence on the Permanence of a Discrete -Species Schoener Competition System with Time Delays
Qianqian Su,Na Zhang
Discrete Dynamics in Nature and Society , 2010, DOI: 10.1155/2010/583203
Abstract: We consider a discrete -species Schoener competition system with time delays and feedback controls. By using difference inequality theory, a set of conditions which guarantee the permanence of system is obtained. The results indicate that feedback control variables have no influence on the persistent property of the system. Numerical simulations show the feasibility of our results. 1. Introduction The Schoener's competition system has been studied by many scholars. Topics such as existence, uniqueness, and global attractivity of positive periodic solutions of the system were extensively investigated and many excellent results have been derived [1–5]. Liu et al. [1] propose and study the global stability of the following continuous Schoener's competition model with delays: where , , and are all positive bounded and continuous functions, are positive integers, , , , . As we all know, though most dynamic behaviors of population models are based on the continuous models governed by differential equations, the discrete time models are more appropriate than the continuous ones when the size of the population is rarely small or the population has nonoverlapping generations. It has been found that the dynamics behaviors of the discrete system are rather complex and contain more rich dynamics than the continuous ones [6]. Recently, more and more scholars paid attention to study the discrete population models (see [4–13] and the references cited therein). For example, [5] considered the permanence and global attractivity of the following discrete Schoener's competition model with delays: where , , and are real positive bounded sequences, are positive integers, , , , On the other hand, as was pointed out by Huo and Li [14], ecosystem in the real world is continuously disturbed by unpredictable forces which can result in changes in the biological parameters such as survival rates. Practical interest in ecology is the question of whether or not an ecosystem can withstand those unpredictable disturbances which persist for a finite period of time. In the language of control variables, we call the disturbance functions as control variables. During the last decade, many scholars did excellent works on the feedback control ecosystems (see [14–21] and the references cited therein); however, most of those works are concerned with the continuous model and seldom did scholars considered the discrete ecosystem with feedback controls ([13, 15, 21]). Recently, Li and Yang [15] proposed the following discrete -species Schoener competition system with time delays and feedback
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