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New Record of Two Soil Ciliates (Ciliophora: Stichotrichia) from Korea
김강산,민기식 한국환경생물학회 2015 환경생물 : 환경생물학회지 Vol.33 No.4
We identified two soil stichotrichs, Eschaneustyla lugeri Foissner, Agatha & Berger, 2002 and Oxytricha auripunctata Blatterer & Foissner, 1988, which were collected from Sarabong, Jeju and Ajoong-ri, Jeonju in Korea, respectively. Eschaneustyla lugeri had the following characteristics: size in vivo 170-230 μm×40-60 μm; body elongate elliptical and often very narrow in the posterior region, highly flexible; cortical granules present; 48-67 macronuclear nodules; 27-47 frontal cirri; 3-5 buccal cirri; frontoterminal row and rightmost midventral row; transverse cirri absent; 4 dorsal kineties; 4-9 caudal cirri. Oxytricha auripunctata had the following characteristics: size in vivo 75-95 μm×25-35 μm; body elliptical, both ends moderately narrowly rounded; orange-yellow cortical granules and yellowish crystals; 3-4 transverse cirri; 5 dorsal kineties; 3 caudal cirri. These two ciliates are first reported in Korea. We describe these ciliates based on live observations and protargol-impregnated specimens.
COI DNA Barcoding for Sterkiella multicirrata (Ciliophora: Oxytrichidae) from South Korea
김강산,지수정,민기식 한국동물분류학회 2020 Animal Systematics, Evolution and Diversity Vol.36 No.1
In the present study, the first mitochondrial cytochrome c oxidase subunit I gene (COI) sequence of Sterkiella multicirrata Li et al., 2018 is presented. To begin with, this species has been also morphologically recorded from South Korea, and this study was performed using genomic DNA of the Korean population. The newly obtained COI sequences of S. multicirrata were identical. And the inter-specific variation between S. multicirrata and S. histriomuscorum was noted at 14.3%. These values correspond well with the results of previous studies. However, because there are very few available COI sequences of stichotrichian in GenBank, it is concluded that continuous accumulation of data is needed for further study.
김강산,정귀상 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.5
This paper presents the electrical, chemical and optical characteristics of porous 3C-SiC (pSiC)for various in-situ N2 doping flow rates. N-type polycrystalline (poly) 3C-SiC thin films were grown on p-type Si (100) wafers by using atmospheric-pressure chemical vapor deposition (APCVD). N_2(0 ~ 40 sccm) was used as the doping source gas, and the pSiC was fabricated by using anodization. The anodization current density and time were adjusted to 7.1 mA/cm^2 and 60 sec, respectively. The average pore diameter of the 10-sccm-doped sample was about 40 nm, and the etched area increased with increasing N_2 flow rate. The electron mobility of the pSiC dramatically decreases from 648 to 4.3 cm^2/V·S with increasing N_2. The properties of the pSiC layer formed by using this method were investigated by using scanning electron microscopy (SEM), X-ray diffraction (XRD),Fourier transform infrared spectroscopy (FT-IR) and photoluminescence (PL). The results show that the thin film and the pSiC were crystalline and that the PL spectra exhibited blue band emissions centered at 495 nm (2.5 eV) and 470 nm (2.7 eV), respectively.
First description of three ciliates (Ciliophora: Stichotrichia) from Korea
김강산,박경진,정재호,민기식 국립생물자원관 2016 Journal of species research Vol.5 No.3
We firstly report three stichotrichs, Metaurostylopsis cheni Chen, Huang & Song, 2010, Gonostomum strenuum (Engelmann, 1862) Sterki, 1878, and Lamtostyla granulifera Foissner, 1997, collected in South Korea. We investigated these ciliates based on observations of live and protargol-impregnated specimens.
New Record of Two Marine Ciliates (Ciliophora: Spirotrichea) in South Korea
김강산,정재호,민기식 한국동물분류학회 2013 Animal Systematics, Evolution and Diversity Vol.29 No.2
Two marine hypotrichous ciliates, Anteholosticha petzi and Ponturostyla enigmatica, were collected from the Yellow Sea and the Korea Strait, respectively, and described using live observation and protargol-impregnated specimens. Furthermore, the nuclear small subunit ribosomal RNA gene of each was sequenced and compared to previously annotated sequences retrieved from the GenBank. Anteholosticha petzi is characterized by 3frontal cirri (FC), 2 frontoterminal cirri (FTC), 8-12 transverse cirri (TC), 1 buccal cirrus (BC), 9-12 midventral pairs (MP), 3 bipolar dorsal kineties (DK), and 3 types of colorless cortical granules. Ponturostyla enigmatica is characterized by 8 FC, 5 ventral cirri (VC), 5-7 TC, 6-7 marginal rows (MR) on each side, 4 complete and 2-3 partial DK, and greenish cortical granules. This is the first identification and description of these 2species, A. petzi and P. enigmatica, in South Korea.