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Natural Frequency Analysis of Femto Slider with Head/Disk Interaction Using Acoustic Emission
Galina Pan,Pyung Hwang,Wu Xuan 한국트라이볼로지학회 2005 한국트라이볼로지학회 학술대회 Vol.2005 No.6
The object of the present work is the natural frequency analysis of femto slider. Head/disk interaction during start/stop and constant speed were detected by using acoustic emission (AE) test system. The frequency spectrum analysis is performed using the AE signal obtained during the head/disk interaction. Natural frequency analysis was performed using Ansys program.
Galina Pan,Pyung Hwang 한국트라이볼로지학회 2004 한국트라이볼로지학회 학술대회 Vol.38 No.-
The object of the present work is the natural frequencies analysis of subambient pressure tripad and pico sliders. Head/disk interaction during start/stop and constant speed were detected by using acoustic emission (AE) test system. The frequency spectrum analysis is performed using the AE signal obtained during the head/disk interaction. Natural frequencies analysis was performed using Ansys program.
The Acoustic Emission Energy Analysis of Subambient Pressure Tri-Pad Slider
Galina Pan,Pyung Hwang,Wu Xuan 한국트라이볼로지학회 2004 한국트라이볼로지학회 학술대회 Vol.39 No.-
The object of the present work is the acoustic emission energy analysis of subambient pressure tri-pad slider. Head/disk interaction during start/stop and constant speed were detected by using acoustic emission (AE) test system. The frequency spectrum analysis is performed using the AE signal obtained during the head/disk interaction. Natural frequency analysis was performed using Ansys program. Acoustic emission energy was calculated for the slider modes.
Galina N. Chelomina,Konstantin V. Rozhkovan,Anastasia N. Voronova,Olga L. Burundukova,Tamara I. Muzarok,Yuri N. Zhuravlev 고려인삼학회 2016 Journal of Ginseng Research Vol.40 No.2
Background: Wild ginseng, Panax ginseng Meyer, is an endangered species of medicinal plants. In the present study, we analyzed variations within the ribosomal DNA (rDNA) cluster to gain insight into the genetic diversity of the Oriental ginseng, P. ginseng, at artificial plant cultivation. Methods: The roots of wild P. ginseng plants were sampled from a nonprotected natural population of the Russian Far East. The slides were prepared from leaf tissues using the squash technique for cytogenetic analysis. The 18S rDNA sequences were cloned and sequenced. The distribution of nucleotide diversity, recombination events, and interspecific phylogenies for the total 18S rDNA sequence data set was also examined. Results: In mesophyll cells, mononucleolar nuclei were estimated to be dominant (75.7%), while the remaining nuclei contained two to four nucleoli. Among the analyzed 18S rDNA clones, 20% were identical to the 18S rDNA sequence of P. ginseng from Japan, and other clones differed in one to six substitutions. The nucleotide polymorphism was more expressed at the positions 440e640 bp, and distributed in variable regions, expansion segments, and conservative elements of core structure. The phylogenetic analysis confirmed conspecificity of ginseng plants cultivated in different regions, with two fixed mutations between P. ginseng and other species. Conclusion: This study identified the evidences of the intragenomic nucleotide polymorphism in the 18S rDNA sequences of P. ginseng. These data suggest that, in cultivated plants, the observed genome instability may influence the synthesis of biologically active compounds, which are widely used in traditional medicine.
Galina Minyuk,Elina Chelebieva,Irina Chubchikova,Natalia Dantsyuk,Irina Drobetskaya,Evgenii Sakhon,Konstantin Chekanov,Alexei Solovchenko 한국조류학회I 2017 ALGAE Vol.32 No.3
We report on the culture growth and stress-induced secondary carotenogenesis in a biotechnologically promising but largely unexplored chlorophyte Coelastrella rubescens strain Vinatzer/Innsbruck V 195. Changes in the cell morphometry, biomass accumulation, its carotenoid and fatty acid profiles were followed in the cultures supplemented with either inorganic (CO2) or organic (sodium acetate) carbon on the background of low-pH stress. Collectively, the results of the study characterize C. rubescens as a biotechnologically promising, potentially double-purpose organism. It produces several secondary keto-carotenoids with a considerable proportion of astaxanthin and canthaxanthin. At the same time, the cell lipid fatty acid profile of this microalga is suitable for obtaining a high-quality biodiesel complying with the strictest EN14214 European standard.