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대구지역에서의 요충 감염상을 알기 위해 1972년 11월부터 73년 4월까지 Graham's Scotch tape Swab 변법으로 1회 검사하였다. 피검아동 3342명중 요충 검출률은 42.6%였다. 모자보건센터에 등록된 유아 592명에서의 검출률은 9.1%였으며, 생후 3개월부터 검출되었고 그 율은 6.6%였다. 고아원 원아 538명중 그 검출률은 54.8%, 일반 가정아이 2112명에서는 50.9%였으며 양자간에 유의적 차를 인정할 수 없었다. 대구시내 국민학교 아동에서의 검출률은 43.4%, 대구근교 국민학교 아동에서는 64.7%롤 전자에 비해 후자에서 검출률이 높았다. 요충감염의 요인으로 추정되는 항목을 설문지로 조사 분석하였던 바 검출자와 비검출자 사이에 뚜렷한 차를 인정할 수 없었다. 이번 조사로 대구지역에서의 요충 검출률(42.6%)은 1959년 검출률(33.8%)에 비해 높다는 것을 알았다. From November 5, 1972 to April 30, 1973, three thousand three hundred and forty-two children were examined for Enterobius vermicularis in the vicnity of Taegu area, Kyungpook Province, Kora. A modification of the Graham's scotch tape swab technique was employed. All were examined once in the morning. The overall detection rate was found to be 42.6 per cent(1424 out of 3342). The prevalence among 592 infants was 9.1 per cent. There was no significant difference in the rate with regard to sex. The infection in infants was firsty established at the 3-month old group with an average of 6.6 per cent. The rate among 2112 children living in private homes was 50.9 per cent; that among children in institutions was 54.8 per cent. This difference was statistically no significant. The rate of infection among children in urban was 43.4 per cent; among children in suburban 64.7 per cent. The difference between the rate of infection among children n urban and among children in suburban were highly significant. The questionnaire studied failed to analyze andy information attributed to Enterobius vermicularis infection between children detected and those undetected. It is clear from persent survery that the rate of infection is higher than that found in a previous report of enterobiasis in this area.
Abstract: The effects of pre-corrosion and applied potentials in artificial seawater on the S-N fatigue behavior of X80 steel were examined. The X80 specimens were pre-corroded in a FeCl3 solution for varying immersion times ranging from 0 to 96 h and subsequently S-N fatigued in air. It was found that the resistance to S-N fatigue decreased abruptly with 1 h immersion, while it became saturated with a further increase in immersion time. The trend observed in this study was relatively well explained by the stress concentration effect from the presence of corrosion damage on the surface. The in-situ S-N fatigue tests were also conducted on X80 steel in artificial seawater under applied potentials of .600, .850 and .1,050 mV (SCE). The fractographic and micrographic analyses were conducted on the fatigue specimens to identify the optimum cathodic protection conditions.
Atrial natriuretic peptide(ANP) is a circulating hormone in the human fetus. Human fetus is able to increase ANP release in response to volume expansion and in direct proportion to heart rate. In this study, we attemped to determine the normal range of ANP in umbilical blood and to evaluate the clinical conditions in which the ANP levels may increase. ANP in the umbilical arterial and venous blood obtained at delivery were measured in 21 normal newborns. The ANP concentration in the umbilical arterial blood(mean ±SD, 19.77 ± 14.85 pg/dl) was significantly correlated with that in the umbilical venous blood(17.55 ± 13.70 pg/dl)(r=0.816). The plasma ANP concentration was not correlated with plasma creatine kinase(total, or MB fraction), maternal weight gain during pregnancy or change of hematocrit after birth. There was no difference of ANP concentration according to delivery method or presence of fetal distress. The ANP concentrations in the umbilical arterial, venous and maternal venous blood from mother suffering from pregnancy-induced hypertension were 34.5±15.0 pg/dl, 38.2±16.4 pg / dl and 71.3±37.1 pg/dl respectively. Each of them were significantly hihger than that from normal mother(15.0±11.6 pg/dl, 12.16±7.1 pg/dl and 30.8±18.7 pg/dl)(P<0.05). Our results suggest that cord blood ANP level is influenced by the maternal ANP level by placental transfer.
Fifteen strains of Shigella were isolated in the Taegu area during the period from 1973 through 1975. They were typed into 3 strains of Shigella dysenteriae, 4 of Sh. flexneri, 3 of Sh. boydii, and 5 of Sh. sonnet. Among them, 9 strains were isolated from 4,496 rectal swabs obtained from apparently healthy persons associated. with food services, and 6 strains were cultured from 219 stool specimens of suspected dysentery patients who visited the Kyungpook University Hospital. Enrichment culture for the isolation of Shigella was evaluated, and it was found that the enrichment in Salmonella-Shigella broth appeared to yield better results than direct culture on eosin methylene blue agar, and enrichment in selenite broth.