• Title/Summary/Keyword: Protective factor

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Relationships Between Mother's Perfectionism and Child's Unconditional Self - Acceptance, Depression, and Anxiety (어머니의 완벽주의와 아동의 무조건적 자기수용 및 우울, 불안 간의 관계)

  • Kim, Sarah Hyoung Sun;Jo, Hanik
    • Korean Journal of Child Studies
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    • v.26 no.5
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    • pp.151-163
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    • 2005
  • This study investigated relationships between mother's perfectionism and child's unconditional selfacceptance, depression, and anxiety. Participants were 602 4th, 5th and 6th grade elementary school children(mean age=11) and their mothers. Children reported levels of unconditional self-acceptance, depression, and anxiety; mothers reported their own perfectionism. Mother's perfectionism was positively related to her child's depression and anxiety. The unconditional self-acceptance of the child was negatively related to child's depression and anxiety. Child's unconditional self-acceptance was found to have moderating effects on the relationship between mother's perfectionism and child's depression and anxiety. The findings of this study indicated that unconditional self-acceptance functions as a protective factor for children who might have such psychological problems as depression and anxiety.

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Relationship between Hard Disk Surface Damage and Data Loss (하드디스크의 표면파손과 데이터 손실과의 관계)

  • 이성창;박용식;전규찬;김대은
    • Journal of the Korean Society for Precision Engineering
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    • v.17 no.2
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    • pp.35-42
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    • 2000
  • In recent years the recording density of hard disks has increased significantly largely due to the decreasing flying height. As a result of decreased flying height, the reliability issue become more critical. In this work the relationship between hard disk surface damage and data loss was investigated by using an actual hard disk drive. The purpose of this research was to identify the key factor which leads to data loss. It was shown that data loss is directly related to the physical damage of the Co-magnetic layer and there was no data loss when only carbon protective coating was damaged by the diamond tip.

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Antioxidant and Anti-inflammatory Activities of Allium victorialis subsp. platyphyllum Extracts

  • Lee, Je-Hyuk;Choi, Soo-Im;Lee, Yong-Soo;Kim, Gun-Hee
    • Food Science and Biotechnology
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    • v.16 no.5
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    • pp.796-801
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    • 2007
  • This study was conducted to investigate antioxidant activity and anti-immunological inflammatory effect of Allium victorialis subsp. platyphyllum extracts (AVPEs). Antioxidant activities of AVPEs were determined by free radical scavenging assay and reducing power test. Leaf-part extract had comparatively better antioxidant activity than other-part extracts. Antioxidant activity of extracts had protective effect for human umbilical vein endothelial cells (HUVECs) against superoxide anions secreted from activated neutrophils. Also, we observed AVPEs had inhibitory effects on the adherence of monocytic THP-1 to HUVEC monolayer to the basal level. Inhibitory effect on cell adhesion was caused by suppression of tumor necrosis factor-${\alpha}\;(TNF-{\alpha})-upregulated$ expression of vascular cellular adhesion molecule-1 (VCAM-1) and E-selectin in HUVECs. From these results, we expect to support the evidence of anti-immunological inflammatory effects of Allium victorialis subsp. platyphyllum (AVP) as a Korean traditional pharmaceutical.

The Effect of Cuprophane Hemodialyzer Treated with Plasma and Albumin on Leukocyte Count (인공신에 의한 백혈구 수의 변화 혈장 및 알부민의 전처치가 이에 미치는 영향)

  • 장현규;박찬현
    • Journal of Biomedical Engineering Research
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    • v.8 no.2
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    • pp.241-244
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    • 1987
  • It is now well established that transient granulocytopenia is common in patients during the initial phase of hemodialysis with new cuprophane membrane, but not with reused nembrane, or some synthetic membranes. In this study, new cuprophane dialyzer was treated with plasma and albumin, respectively, then, peripheral blood leukocytes were counted at the onset and after 15 minute of hemodialysis. In the plasma-treated group, the percent of leukopenia was less (41.3 %) than control group (71.3 %). In the plasmatreated group, the degree of leukopenia was close to that ot'control grou p. The protective factor, therefore is thought to be present in the plasma other than albumin fraction.

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Corrosion Monitoring of PEO-Pretreated Magnesium Alloys

  • Gnedenkov, A.S.;Sinebryukhov, S.L.;Mashtalyar, D.V.;Gnedenkov, S.V.;Sergienko, V.I.
    • Corrosion Science and Technology
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    • v.16 no.3
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    • pp.151-159
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    • 2017
  • The MA8 alloy (formula Mg-Mn-Се) has been shown to have greater corrosion stability than the VMD10 magnesium alloy (formula Mg-Zn-Zr-Y) in chloride-containing solutions by Scanning Vibrating Electrode Technique (SVET) and by optical microscopy, gravimetry, and volumetry. It has been established that the crucial factor for the corrosion activity of these samples is the occurrence of microgalvanic coupling at the sample surface. The peculiarities of the kinetics and mechanism of the corrosion in the local heterogeneous regions of the magnesium alloy surface were investigated by localized electrochemical techniques. The stages of the corrosion process in artificial defects in the coating obtained by plasma electrolytic oxidation (PEO) at the surface of the MA8 magnesium alloy were also studied. The analysis of the experimental data enabled us to determine that the corrosion process in the defect zone develops predominantly at the magnesium/coating interface. Based on the measurements of the corrosion rate of the samples with PEO and composite polymer-containing coatings, the best anticorrosion properties were displayed by the composite polymer-containing coatings.

Effects of Ore Minerals on the Damages of Animal Cells (광물성 미네랄이 동물세포의 손상에 미치는 효과)

  • Jeon, Yu-Mi;Kim, Jum-Ji;Lee, Mi-Young
    • Journal of Environmental Science International
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    • v.18 no.12
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    • pp.1391-1398
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    • 2009
  • In this study, we investigated the suppressive effects of ore minerals on the allergic cell damages and oxidative cell damages. The ore minerals significantly reduced the productions of tumor necrosis factor-alpha (TNF-${\alpha}$) and interleukin-4 (IL-4) in rat basophilic leukemia cells challenged with 2,4-dinitrophenol-bovine serum albumin (DNP-BSA). Lipoxygenase activity was also reduced by the ore minerals. Moreover, the ore minerals showed weak protective effects on the oxidative damage induced by hydrogen peroxide in pig kidney cells and retinal ganglion cells. Photohemolysis of erythrocytes in the presence of rose-bengal as a sensitizer was also inhibited by ore minerals. These results suggest that the ore minerals may be useful as the protectant for allergic and oxidative cell damages.

Effects of Menopause on Obstructive Sleep Apnea (폐경이 폐쇄성 수면무호흡에 미치는 영향)

  • Cyn, Jae-Gong
    • Sleep Medicine and Psychophysiology
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    • v.17 no.1
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    • pp.11-15
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    • 2010
  • Obstructive sleep apnea is a common sleep disorder that predominantly affects adult men than women. However, the prevalence in women increases with menopause dramatically. Menopause has long been described as a risk factor for obstructive sleep apnea. Recent large well-designed population studies support that menopause increases the risk for sleep-disordered breathing. The mechanism of that hypothesis is not yet clear. But, the decline in progesterone has been thought to influence the development of obstructive sleep apnea because progesterone is a respiratory stimulant and plays a protective role against sleep apnea. Increased visceral obesity and hypertension as major symptoms of metabolic syndrome are also associated with menopause and place women at increased risk for obstructive sleep apnea and other serious health problem. Hormone replacement therapy has been associated with a lower prevalence of sleep apnea. But, relative risk and benefits of hormone replacement therapy compared with other treatment options will require thorough consideration for each individual woman. Finally, attention should be drawn to the need for obstructive sleep apnea evaluation in perimenopausal and postmenopausal women.

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A performance based strategy for design of steel moment frames under blast loading

  • Ashkezari, Ghasem Dehghani
    • Earthquakes and Structures
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    • v.15 no.2
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    • pp.155-164
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    • 2018
  • Design of structures subjected to blast loads are usually carried out through nonlinear inelastic dynamic analysis followed by imposing acceptance criteria specified in design codes. In addition to comprehensive aspects of inelastic dynamic analyses, particularly in analysis and design of structures subjected to transient loads, they inherently suffer from convergence and computational cost problems. In this research, a strategy is proposed for design of steel moment resisting frames under far range blast loads. This strategy is inspired from performance based seismic design concepts, which is here developed to blast design. For this purpose, an algorithm is presented to calculate the capacity modification factors of frame members in order to simplify design of these structures subjected to blast loading. The present method provides a simplified design procedure in which the linear dynamic analysis is preformed, instead of the time-consuming nonlinear dynamic analysis. Nonlinear and linear analyses are accomplished in order to establish this design procedure, and consequently the final design procedure is proposed as a strategy requiring only linear structural analysis, while acceptance criteria of nonlinear analysis is implicitly satisfied.

A study of injury mechanism and neural plasticity of traumatic brain injury (외상성 뇌손상의 손상 기전과 신경가소성에 대한 고찰)

  • Song Ju-min;Kim Jin-Sang
    • The Journal of Korean Physical Therapy
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    • v.16 no.2
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    • pp.90-98
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    • 2004
  • Traumatic brain injury is an insult to the brain caused by an external physical force, that may product a diminished or altered state of consciousness, which results in impairment of cognitive abilities or physical function. The purposes of this study were to overview injury mechanism and neural plasticity of traumatic brain injury. Injury mecanism includes exitotoxicity, production free radical, inflammation and apoptosis. Furthermore traumatic brain injury has protective mechanisms includes production of neural growth factor, heat shock protein, anti-inflammatory cytokines.

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Development of New Drug, Epidermal Growth Factor for Chronic Diabetic Foot Ulcer

  • Yoo, Young-hyo
    • Proceedings of the Korean Society of Applied Pharmacology
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    • 2000.04a
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    • pp.3-5
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    • 2000
  • Of 16 million diabetic patients in the USA, 2.4 millions have experienced diabetic foot ulcer and 67,000 have amputations every year. For treatment of diabetic foot ulcer, Americans spend more than $1 billion each year, including $36,000 per patient for complete treatment and $60,000 for each amputation. Neuropathy and ischemia, two common complications of diabetes mellitus, are the primary underlying risk factors for development of diabetic foot ulcers. Ischemic ulcers develop as a result of low perfusion pressure in the foot with inadequate blood supply, whereas neuropathic ulcers develop from loss of protective sensation. In addition, diabetes also increases the risk of infection by impairing the body's ability to eliminate bacteria. From these circumstances, results are chronic wounds with impaired healing ability.

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