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이정자,김명준 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.3
The purpose of this study was to examine the effects of types of leisure activity and Leisure satisfaction through university student. The main purpose of this study was to examine the effects of the types in Leisure activity on Leisure satisfaction by comparing the difference of psychological, educational, social, physiological, environmental, and relaxant satisfaction. Subjects of this study were sampled 356 a university man by the random sampling method, Statistics employed in this study were analysis of covariance(ANCOVA). Based on the procedures and result, the following conclusions were warranted: First, the types of leisure activity among a university man has an influence on psychological satisfaction, That is, there is difference in the psychological satisfaction according to the types of leisure activity, and sports activities is highest. Second, the types of leisure activity among a university man has an influence on educational satisfaction, That is, there is difference in the educational satisfaction according to the types of leisure activity, and sports activities is highest. Third, the types of leisure activity among a university man has an influence on social satisfaction, That is, there is difference in the social satisfaction according to the types of leisure activity, and social activities is highest. Forth, the types of leisure activity among a university man has an influence on physiological satisfaction That is, there is difference in the physiological satisfaction according to the types of leisure activity, and sports activities is highest. Fifth, the types of leisure activity among a university man has an influence on environmental satisfaction, That is, there is difference in the environmental satisfaction according to the types of leisure activity, and sightseeing activities is highest. Sixth, the types of leisure activity among a university man has an influence on relaxant satisfaction, That is, there is difference in the relaxant satisfaction according to the types of leisure activity, and sports activities is highest.
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가스법에 의한 염기성 탄산마그네슘의 제조 : 4 . 염기성 탄산마그네슘의 생성 4 . Formation Process of Basic Magnesium Carbonate
이정자,이문득,나익영 한국화학공학회 1973 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.11 No.1
The following results have been obtained through the studies on the preparation of basic magnesium carbonate by gas method. The basic magnesium carbonate could be identified by means of the pH measurement, chemical analysis, refractive index, X-ray diffraction and microscopic studies. The formation of basic magnesium carbonate from Mg (OH)₂ suspension and CO₂ depended on the concentration of Mg (OH)₂ in the suspension and the flow rate of CO₂ as well as on temperature. The basic magnesium carbonate formation with 0.24 mole/ℓ of Mg (OH)₂ suspension and CO₂ flow rate of 33 ㎖/min. at 70-90℃ did not give MgCO₃ · 3H₂O, but gave a compound with mole ratio of CO₂/MgO of 0.75-0.84, which corresponds approximately to (3-5) MgCO₃ · Mg(OH)₂ · (3-5) H₂O. The refractive index was about 1.531. When Mg(HCO₃)₂ solution was heated, a metastable compound was formed initially, which then transformed into MgCO₃ · 3H₂O, and this in turn gave basic magnesium carbonate by decomposition (into CO₂ and H₂O). In order to obtain the best quality basic salt, it is therefore important to assure that Mg(OH)₂ neutral Mg-salt and amorphous compound do not coexists in the finished product.
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서울시내 수산시장에서 유통되고 있는 수산물의 비소(As ) , 카드뮴(Cd ) 및 납(Pb ) 의 함량
이정자,이재인,함희진,차영섭 한국식품위생안전성학회 2001 한국식품위생안전성학회지 Vol.16 No.4
This study was concentrated that the contents of heavy metals were estimated from 782 samples of sold fisheries in Seoul(33 species in fishes, 15 in bivalves, 12 in crustaceans and 10 in others) by Atomic Absorption Spectrometer. The contents of As, Cd and Pb [minimum-maximum (mean)] were N.D.-0.162 mg/kg(0.021), 0.001-0.120 mg/kg(0.014) and 0.015-0.499 mg/kg(0.111) in fishes, 0.003-0.311 mg/kg(0.052), N.D.-1.905 mg/kg(0.182) and 0.013-0.462 mg/kg(0.138) in bivalves, N.D.-0.328 mg/kg(0.042), 0.002-1.113 mg/kg(0.079) and 0.006-0.510 mg/kg(0.109) in crustaceans, N.D.-0.181 mg/kg(0.024), 0.001-0.214 mg/kg(0.033) and 0.010-V0.877 mg/kg(0.118) in others respectively, bivalves were the highest than others. The average weekly intakes of three metals from sold fisheries took about 1.4-26.4% of PTWI (provisional tolerable weekly intakes) that FAO/WHO Joint Food Additive and Contaminants Committee had set to evaluate their safety.
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우울한 어머니와 아동의 문제행동 관계에서 아버지의 양육행동 조절효과
이정자 한국아동심리재활학회 2021 놀이치료연구 Vol.25 No.2
This study aims to examine the moderating effects of father’s parenting behavior on the effects of mother depression on child problem behavior. The study sample was 1466 elementary schools first graders (740 boys, 706 girls) who had participated in the eighth wave of the Panel Study on Korean Children (PSKC). For this, it carried out questionnaires, which was composed of mother depression scale, child behavior checklist and father parenting behavior scale. The data were analyzed using Pearson’s correlations and regression analysis with SPSS 18.0. The results are as follows. First, mother’s depression and father’s parenting behavior had a significant correlation on child problem behavior. Second, mother’s depression is predicting variables for child problem behavior. Third, father’s strict parenting behavior had moderating effects in mother’s depression on child problem behavior. These results add to a better understanding of the mechanism linking mother depression and father parenting behavior on children’s problem behavior. These findings can serve as an important contribution to future research and practices for reducing children’s problem behavior.
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