• Korean Journal of Plant Resources
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• v.16 no.1
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• pp.61-73
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• 2003

External and anatomical characters such as stem, leaf, ovary, calyx lobe, ultrastructure of stigma epidermis of leaf blade and midvein, corolla lobe, seed coat and pollen were examined on Pterygocalyx volubilis and Tripterospermum japonicum of Korean Gentianaceae. Fruit characters(capsule and berry), absent or not of corona and pollen characters(reticulate and striate) has been used by identification characters of two taxa. But study results, external characters(root, leaf, calyx lobe, stigma, anther), internal characters(calyx love, ovary) and ultrastructure characters(epidermis o leaf blade and midvein, corolla lobe, seed coat) were useful for species identification. Taxonomic relationships among problematic taxa were discussed.

• Parasites, Hosts and Diseases
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• v.51 no.4
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• pp.427-432
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• 2013

A new trichostome ciliate, Balantidium honghuensis n. sp., was isolated from the recta of Rana nigromaculata and R. limnocharis during parasite surveys in Honghu Lake, Hubei Province, central China in summmer of 2010 and 2011. Its detailed morphometric characters based on LM and SEM studies were described herein. The organism is oval in shape and thickly ciliated. The vestibulum is "V" shaped and occupies about 1/3 to 2/5 of the body length. The vestibular and nearby regions possess strong peripheral fibers which form a marked axial fiber about the cytopharynx. More than 10 contractile vacuoles are distributed along the periphery of the latter body. Comparisions were made between this new species and B. sinensis Nie, 1935. They were discriminated from each other in terms of general body forms, body size, and vestibulum shapes. Besides, special attention was paid to its high-speed daughter swarmers which we believed to be the infective stage of B. honghuensis. Possible infection routes of anura amphibian balantidia were discussed.

• Journal of Korean Ophthalmic Optics Society
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• v.1 no.2
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• pp.19-35
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• 1996

This study was performed on the mouse to estimate the effect of UV radiation on the cornea in UV clean bench by LM & SEM. The results are as follows In the control groups, The cornea tissue have relatively compact and each layer have well identify, and the thick of cornea have constant. In the increasing experimental time, the experimental result have very different. The early experimental groups results have not severely degeneration. But, some substrate layer have a swelling and some epithelial tissue have not normal shape. The middle experimental groups results have very swelling of the stroma, the vacoule of some region the condensation of the epithelium, and the irregular arrangement of the endothelium. The last experimental groups results have shirinking of cornea tissue, the swelling and vacoule of the end endothelium, the partially disruption of epithelium, the irregular thick of the corneal tissue.

• Journal of Korean Society of Forest Science
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• v.88 no.2
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• pp.213-220
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• 1999

The pollen morphology of six taxa of the genus Indigofera in Korea was investigated by light microscope(LM) and scanning electron microscope(SEM). The pollen grains of the genus were monads, prolate spheroidal or subprolate, and trizonocolporate. Sculpture patterns of mesocolpium area were densely microperforate(DMIP) or verrucate with pitted perforate striae(VPPS). Based on sculpture patterns in mesocolpium, apocolpium and colpus areas, three major pollen types of Indigofera were discernible ; Decora, Kirilowii and Koreana. It seemed as if there was some relationship between chromosome numbers and mesocolpium sculpture patterns and the pollen types Decora and Kirilowii were branched out from the pollen type Koreana.

• Journal of Species Research
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• v.9 no.3
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• pp.191-197
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• 2020

Species belonging to the genus Tryblionella are important members of the diatom assemblages of benthic environments such as tidal flats. Their proper identification is thus of great importance in terms of taxonomy, ecology, as well as environmental sciences. However, many species of the genus have been neglected and/or misidentified during diatom studies of Korean tidal flats possibly due to the small size of the species. Lack of proper references for the identification of the species is also noted. To better understand the diversity of Tryblionella species, sediment samples were taken from various tidal flats of the Yellow Sea. Light microscope (LM) and scanning electron microscope (SEM) observations have shown the presence of Tryblionella adducta and T. hyalina, which have not been previously reported from Korean tidal flats. The former was found mostly from sand flats and the latter from mudflats. It is expected that the present study would contribute to a better understanding of the diversity and ecology of benthic diatoms of the Korean tidal flats.

• Journal of Plant Biology
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• v.35 no.3
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• pp.205-210
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• 1992

Size>; and sculpture pattern of pollen grains in seven species and two varieties of the genus Lilium in Korea were examined by LM and SEM, and their evolutionary trends were discussed. Lilium species in Korea can be divided into two groups based on pollen morphology: one is small reticulate group with small pollen grains and lumens, which includes L. concolor var. pulchellum and L. callosum; the other is large reticulate group with large pollen grains and lumens, which includes remaining taxa. It is thought that small reticulate group is more primitive than large reticulate group on the basis of tectum coverage. According to the above results and some morphological characters of salles and perianth segments, L. concolor var. pulchellum and L. callosum are very closely related, and they would be treated under the same subsection.ection.

• Proceedings of the Materials Research Society of Korea Conference
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• 2012.05a
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• pp.109.2-109.2
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• 2012

연구에서는 co-sputtering 시스템을 이용하여 아나타세 $TiO_2$의 도핑 농도 변화에 따른 다성분계 $TiO_2$-ITO (TITO) 박막의 전기적, 광학적, 구조적 특성 변화를 알아보고 고 효율을 가지는 인광 유기발광 다이오드를 제작 하였다. 상온에서 최적화된 다성분계 TITO 투명 전극의 급속 열처리 시 $600^{\circ}C$ 급속 열처리 조건에서 매우 낮은 18.06 ohm/sq.면저항, $5.1{\times}10^{-4}$ ohm-cm 비저항과 가시광선 영역 400~550 nm 에서 87.96 %이상의 높은 광학적 투과율과 4.71 eV의 일함수를 확보할 수 있었다. 또한TITO 박막을 양극으로 하여 OLED 소자를 제작한 후 그 성능을 평가하였다. 기존의 ITO 전극과 비교하면 다성분계 TITO 인광 유기 발광 다이오드의 quantum efficiencies (21.69 %)와 power efficiencies (90.92 lm/W)로 ITO 투명전극과 매우 유사함을 알 수 있었고 아나타세 $TiO_2$가 도핑된 TITO 투명 전극의 급속 열처리 공정에도 불구하고 매우 평탄한 표면을 나타냄을 SEM 이미지를 통하여 확인할 수 있었다. 이러한 TITO 투명 전극의 우수한 전기적, 광학적, 구조적 특성은 indium saving 투명 전극으로써 고가의 ITO 박막의 대치가능성을 나타낸다.

• Transactions of the Korean hydrogen and new energy society
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• v.3 no.2
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• pp.9-15
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• 1992

Electroless copper plating method using an alkaline bath have been employed in copper coating of the (LM)Ni4.5Co0.1MnO.2A10.2 hydrogen storage alloy powders for electrode preparation. The plating were conducted without any pretreatment of alloy powders. For the preparation of the electrodes, about 0.12g of the copper coated alloy powder (copper to alloy ratio 1/3 by weight) was compacted with pressure of 6 tons/cm2 at room temperature. The disk-type compacts had a diameter of 10mm and thickness of about 0.24mm. The electrode characteristics were examined through SEM observations and electrochemical measurements in a half cell. The electrochemical measurement showed that the maximum discharge capacity of the electrodes prepared by using alkaline bath were 245mAh per gram of coated alloy (327mAh per gram of alloy) and appeared a considerable degradation with increasing number of cycles. The decrease of the discharge capacity after 100 cycles was about 30% It can be suggested that, with a slight of improvement, this electroless copper plating method could be applied to the preparation of the rare earth-nickel based alloy electrode.

• Journal of Korean Society of Forest Science
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• v.78 no.2
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• pp.132-142
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• 1989

The pollen morphology of 15 species, 2 varieties and 1 forma belonging to 6 sections of the subgenus Salix was investigated by means of light and scanning electron microscopy. From a pollen-morphological point of view, subgenus Salix is stenopalynous. Species from six sections have been distinguished on the basis of pollen morphology, and a key for their identification using pollen is presented. Based on pollen morphology, S. jessoensis(section Subalbae) is the most distinct of the species studied. Species of section Hurmboldtianae appear to be the most evolved in this subgenus with a closer relationship to section Amygdalinae than any other section of this subgenus.

• Journal of the Korean Institute of Electrical and Electronic Material Engineers
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• v.27 no.11
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• pp.707-711
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• 2014

The $0.99Bi_{0.5}(Na_{0.78}K_{0.22})_{0.5}TiO_3-0.01LaAlO_3$, $0.01LaMnO_3$ or $0.01LaFeO_3$ (0.99BNKT-0.01LA, 0.01LM or 0.01LF) ceramics were prepared by a conventional mixed mothod. The structure and morphology of the lead free ceramics were characterized by XRD (X-ray diffraction) and FE-SEM (field emission scanning electron microscopy). XRD results indicated that the BNKT ceramics modified by LA, LM or LF induced a transition from a ferroelectric tetragonal to a non-polar pseudo-cubic phase, leading to decrease in the remnant polarization ($P_r$) and coercive field ($E_c$) in the P-E hysterisis loops. The effects of the BNKT ceramics modified by La-based $ABO_3$ pervskite structure on the electric-field induced strain were investigated, and the largest normalized unipolar strain ($S_{max}/E_{max}$) was found in BNKT-0.01LF ceramic.