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EMISSION LINE VELOCITY FIELD OF THE MAGELLANIC IRREGULAR GALAXY NGC 4449
SASAKI MINORU,OHTANI HIROSHI,SAITO MAMORU,OHTA KOUJI,YOSHIDA MICHITOSHI,SHIMIZU TASUHlRO,KOYANO HISASHI,KOSUGI GEORGE,AOKI KENTARO,SASAKI TOSHIYUKI The Korean Astronomical Society 1996 Journal of The Korean Astronomical Society Vol.29 No.suppl1
The imaging spectroscopic observations of the Magellanic irregular galaxy NGC 4449 were made to show the detailed kinematic structure of the galaxy. Many filamentary structures and Several bubble-like structures are recognized in a 3D data cube of H$\alpha$ emission line. Velocity field shows the kpc-scale mosaic structure and counter- rotation of ionized gas.
Lee Jin-Yong,Yoshida Minoru,Satoh Masahiko,Watanabe Chiho 한국독성학회 2024 Toxicological Research Vol.40 No.1
In this study, we investigated the neurobehavioral alterations and modifications of gene expression in the brains of female mice exposed to low-level mercury vapor and/or methylmercury during postnatal development. The mice were exposed to low-level mercury vapor at a mean concentration of 0.094 mg/m3 and supplied with tap water containing 5 ppm methylmercury from postnatal day 11 to 12 weeks of age. Behavioral analyses were performed at 17 weeks of age. Total locomotor activity in the open field test and the retention trial performance in the passive avoidance test were significantly reduced in the combined exposure group compared with those in the control group. The differences in locomotor activity and performance in the retention trial at 17 weeks were no longer detected at 45 weeks. These results suggest that the effect of aging on the behavioral abnormalities resulting from postnatal exposure to mercury complexes are not significant. In the microarray analysis of brains in the combined exposure group, the gene expression levels of Ano2 and Sgk1 were decreased. Real-time RT-PCR analysis confirmed these changes caused by combined mercury exposure, showing significant downregulation of Ano2 and Sgk1 in the cerebrum. These genes play key roles in the brain as a calcium-activated chloride channel and as a kinase that responds to cellular stress, respectively. Our findings provide insight into the neurobehavioral changes caused by combined mercury exposure.
Jung, Inkyung,Matsuyama, Akihisa,Yoshida, Minoru,Kim, Dongsup BioMed Central 2010 BMC bioinformatics Vol.11 No.suppl1
<P><B>Background</B></P><P>Post-translational modifications (PTMs) have a key role in regulating cell functions. Consequently, identification of PTM sites has a significant impact on understanding protein function and revealing cellular signal transductions. Especially, phosphorylation is a ubiquitous process with a large portion of proteins undergoing this modification. Experimental methods to identify phosphorylation sites are labor-intensive and of high-cost. With the exponentially growing protein sequence data, development of computational approaches to predict phosphorylation sites is highly desirable.</P><P><B>Results</B></P><P>Here, we present a simple and effective method to recognize phosphorylation sites by combining sequence patterns and evolutionary information and by applying a novel noise-reducing algorithm. We suggested that considering long-range region surrounding a phosphorylation site is important for recognizing phosphorylation peptides. Also, from compared results to AutoMotif in 36 different kinase families, new method outperforms AutoMotif. The mean accuracy, precision, and recall of our method are 0.93, 0.67, and 0.40, respectively, whereas those of AutoMotif with a polynomial kernel are 0.91, 0.47, and 0.17, respectively. Also our method shows better or comparable performance in four main kinase groups, CDK, CK2, PKA, and PKC compared to six existing predictors.</P><P><B>Conclusion</B></P><P>Our method is remarkable in that it is powerful and intuitive approach without need of a sophisticated training algorithm. Moreover, our method is generally applicable to other types of PTMs.</P>
김찬국,山谷和久,吉田稔 동아대학교 공과대학 부설 한국자원개발연구소 1994 硏究報告 Vol.18 No.1
A study was performed for determination of trace of selenium in igneous rocks, by means of hydride generation methods with preconcentration. The procedure follows : At first, transfer 10㎖ of sample solution and 10㎖ of hydrochloric acid to a reaction vessel and inject 3% sodium tetrahydroborate solution with a flow rate of 4㎖/min for 45 seconds. Hydrogen selenide is generated from the sample solution by passing nitrogen gas at a flow rate of 125-150㎖/min for 3 minutes. Then the nitrogen gas bearing the hydrogen selenide is introduced in an absorbing solution(3M HC10₄ 5㎖十0.02M KMnO₄ 0.20㎖+0.05M Na₂C₂O₄0.15㎖) through a sintered glass filter At the second step, concentrated hydrochloric acid of 5㎖ with 1M potassium bromide solution of 0.20㎖ are added to the sample solution and then the solution was heated up to 95℃ for 45minutes for reduction of Se(Ⅵ) to Se(Ⅳ). The selenium contents of the concentrated sample solution were determined by A. A. S. The proposed method was applied to the determination of Se in igneous rock samples and satisfactory results were obtained.