• Title/Summary/Keyword: Morphological damage

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Morphological Review on Mitochondria Damage by Irradiation (방사선에 의한 미토콘드리아 손상의 형태학적 고찰)

  • JI, Tae-Jeong
    • Journal of radiological science and technology
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    • v.43 no.1
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    • pp.29-34
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    • 2020
  • Mitochondria was observed much around the nuclear membrane of liver tissue where the energy metabolism process is active. Testis tissue had a large number of undifferentiated cells, and cristae in Inner membrane of Mitochondria was not observed clearly. Morphological damage occurred first in Inner membrane rather than the outer membrane. The kidney tissue was clearly observed in the form of cristae. Radiation-induced damage occurred at the edges of both ends, and the membrane was observed bursting with the thickness of the outer membrane. Small intestine cells were observed in many mitochondria in the tissues around the villus, where bowel movements were active. Morphological damage occurred with the outer and inner membranes getting tangled. Mitochondria sensitivity to radiation was sensitized in testis and small intestine tissues, and kidney, ovary and liver tissues were found to be resistant.

The Comparison of Physical & Morphological Damage of Hair According to the Bleaching Methods by the $H_2O_2$ Concentration (탈색단계별 과산화수소 농도에 따른 모발의 물리.형태적 손상정도 비교)

  • Lee, Eung-Kyeung;Hwang, Jung-Deog;Kim, Hye-Jeung
    • Journal of the Korean Society of Fashion and Beauty
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    • v.5 no.1 s.12
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    • pp.71-77
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    • 2007
  • This study attempted to comparative analysis about the physical and morphological damage degrees of hair according to the bleaching methods by $H_2O_2$ concentration. As a result of the changes in the physical characteristics of the hair according to the deceleration operation methods by 3-6-9% and 9% $H_2O_2$ concentration, the intensity of tension considerably decreased but the elongation was increased. And the more the damage of hair, the larger the degree of change. Regarding the method of deceleration operation, the 3-6-9% deceleration operation method was more damaging than the 9% single deceleration operation method. In the change of the characteristics of the form of the hair, the control group of the 5-level deceleration hair generally showed a smooth external appearance and regular and closely overlapped epidermis and undamaged cuticle were observed. But in the 3-6-9% deceleration operation method and 9% single deceleration operation method, damages such as the irregular form of the edge of the epidermis and the unclear boundary between the epidermis occurred.

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A Study of Hair Damage depending on Hair Treatment Conditions and Morphological Change in Hair (트리트먼트 처리조건에 따른 모발 손상 및 형태학적 변화에 관한 연구)

  • Joo, Yeon Bin;Lim, Sun Nye
    • Textile Coloration and Finishing
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    • v.27 no.3
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    • pp.219-227
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    • 2015
  • This study aims to propose a method to reduce hair damage after investigating the following: the factors which vary depending on hair treatment conditions; the degree of hair damage in the bleached sample; and an analysis of the effects of a perm on wave formation. To determine the effects of these treatment types, hair bleach was mixed with the hair treatment, and hair damage and formation of permanent waves were examined. Using a scanning electron microscope, in addition, morphological changes were analyzed and the following results were obtained: After mixing natural powder(2.5g) and hair cream(2.5g) and bleaching the mixture, it was compared to the scale structure of untreated hair. When 5g of natural powder was mixed and bleached, a clear layer was observed among cuticle scales, showing the effects of hair treatment. Therefore, this confirms that the effects of hair treatment were most notable when grain powder was mixed with hair cream. Once hair is damaged, it is almost impossible to regain its original state. When chemical agents are used, therefore, it is important to consider the possible hair damage they cause.

A Morphological Study on the Modern Urbanization and Transformation Type of Urban Tissues in Kunsan (군산의 근대도시발달과정과 도시조직의 변화 유형에 관한 형태학적 연구)

  • Lee, Kyung-Chan;Huh, Joon
    • Journal of the Korean Institute of Landscape Architecture
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    • v.32 no.6 s.107
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    • pp.36-51
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    • 2005
  • The purpose of this thesis is to analyse modem urbanization process and the morphological transformation of the urban tissues in Kunsan between the you 1899 and 2001, The method of this study is to investigate the transformation process of morphological elements such as plot structure, building layout, building facades, land use, exterior space structure and their use, with actual field surveys, the analysis of land registration maps in 1912, and various topological map. Morphological analysis on modern Kunsan is progressed by three steps-typo-morphological analysis of urban tissue in old-town area, interpretation of morphological process, and transformation process, of morphological structure in Japanese concession in view of plots system. As a result, it is found that there is cyclical relationship among the morphological transformation processes of morphological elements, plots, buildings, land-uses, and access space to buildings. From the view of town plan change, the period of restoration of war damage in 1950s and compressive growing period in 1960s have important meaning in the morphological process of old-town area. Particularly the first building plan and layout type together with plot form and structure is acted as the main factor to decide the subsequent plot transformation system, exterior space system and the particular streetscape in Kunsan.

Hepatoprotective Effects of Andrographis paniculata against Carbon Tetrachloride-Induced Liver Damage

  • Rana, A.C.;Avadhoot, Y.
    • Archives of Pharmacal Research
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    • v.14 no.1
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    • pp.93-95
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    • 1991
  • Alcoholic extract of the leaves of Andrographis paniculata Ness (=AAP) was obtained by cold maceration. A dose of 300 mg/kg $(1/6of\;LD_{50})$ of the extract was selected to study hepatoprotective action against carbon tetrachloride-induced liver damage. The extract was found to be effective in preventing liver damage which was evident by morphological, biochemical and functional parameters.

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Hepatoprotective Effect of Vitex negundo against Carbon Tetrachloride-Induced Liver Damage

  • Avadhoot, Y.;Rana, A.C.
    • Archives of Pharmacal Research
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    • v.14 no.1
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    • pp.96-98
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    • 1991
  • Alcoholic extract of the seeds of Vitex negundo Linn. was obtained by cold maceration. A dose of 250 mg/kg $(1/6\;of\;LD_{50})$ of the extract was selected to study the hepatoprotective action against carbon tetrachloride-induced liver damage. The extract was found to be effective in preventing liver damage which was evident by morphological, biochemical and functional parameters.

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The Dependency of Surface Damage to NiSi for CMOS Technology (CMOS 소자를 위한 NiSi의 Surface Damage 의존성)

  • 지희환;안순의;배미숙;이헌진;오순영;이희덕;왕진석
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.16 no.4
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    • pp.280-285
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    • 2003
  • The influence of silicon surface damage on nickel-silicide (NiSi) has been characterized and H$_2$ anneal and TiN rapping has been applied to suppress the electrical, morphological deterioration phenomenon incurred by the surface damage. The substrate surface is intentionally damaged using Ar IBE (Ion beam etching) which can Precisely control the etch depth. The sheet resistance of NiSi increased about 18% by the surface damage, which is proven to be mainly due to the reduced silicide thickness. It is shown that simultaneous application of H: anneal and TiN capping layer is highly effective in suppressing the surface damage effect.

Relationships between Carrier Lifetime and Surface Roughness in Silicon Wafer by Mechanical Damage (기계적 손상에 의한 실리콘 웨이퍼의 반송자 수명과 표면 거칠기와의 관계)

  • 최치영;조상희
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.12 no.1
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    • pp.27-34
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    • 1999
  • We investigated the effect of mechanical back side damage in viewpoint of electrical and surface morphological characteristics in Czochralski silicon wafer. The intensity of mechanical damage was evaluated by minority carrier recombination lifetime by laser excitation/microwave reflection photoconductance decay technique, atomic force microscope, optical microscope, wet oxidation/preferential etching methods. The data indicate that the higher the mechanical damage degree, the lower the minority carrier lifetime, and surface roughness, damage depth and density of oxidation induced stacking fault increased proportionally.

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Condition Monitoring of Hydraulic Piston Motor using Morphological Analysis of Wear Particles (마멸입자 형태해석에 의한 유압피스톤용 모터의 상태감시)

  • 문병주;조연상;박흥식;전태옥
    • Journal of the Korean Society of Manufacturing Technology Engineers
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    • v.9 no.6
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    • pp.127-132
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    • 2000
  • Morphological analysis of wear particles is one of useful methods for machine condition monitoring because it is well reflected in machine driving state. This paper was undertaken to apply to the condition monitoring of hydraulic piston motor. The lubricating wear test was performed under different experimental conditions using the wear test device and wear specimens of the pin on disk type was rubbed in paraffinic base oil by three kinds of lubricating materials, varying applied load, sliding distance. The four shape parameters(50% volumetric diameter, aspect, roundness and reflectivity) are used for morphological analysis of wear particles. The results showed that the four shape parameters of wear particles depend on a kind of the lubricating materials. It was capable of calculating presumed wear volume for three kinds of materials on driving time to foresee as damage condition of lubricating materials.

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Occurrence of Japanese Gall-forming Thrips, Ponticulothrips diospyrosi Haga et Okajima(Thysanoptera:Phlaelthripidae) in Korea (감관총채벌레(신칭:Ponticulothrips diospyrosi Haga et Okajima)(Thysanoptera:Phlaelthripidae)의 발생)

  • Lee, Kyu-Chul;Park, Chung-Gyoo;Choo, Ho-Yul;Choo, Ho-Yul;Woo, Kun-Suk;Kang, Chang-Heon
    • Korean journal of applied entomology
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    • v.41 no.1
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    • pp.1-4
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    • 2002
  • A thysanopteran pest pest was collected from the damaged leaves of Fuyu persimmon (Diospyrosi kaki) at Changwon, Gyeongnam province in June, 2000. The thrips was identified as Japanese gall-forming thrips, Ponticulothrips diospyrosi(Phlaeothripidae). which is newly recorded in Korea. Brief morphological and ecological characters, damage symptoms, and distribution in Gyeongnam province were provided.