http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 김진범 (검색결과 381 건)
- 무료
- 기관 내 무료
- 유료
-
-
-
-
소각 비산재의 적정처리를 위한 기초연구(Ⅱ) : 용출인자의 영향;Effect of Leaching Parameter
김진범,이우근,심영주 江原大學校 附設 環境硏究所 2000 環境硏究 Vol.17 No.-
본 연구는 소각 비산재의 물리·화학적 특성이 중금속의 용출 거동에 미치는 영향을 알아보고자 수행하였다. 영향인자로는 비산재의 pH, CEC, 입자크기, 연속추출방법에 의해 분류된 중금속의 존재형태 중에서 exchangeable fraction을 고려하였다. KSLT법에 의한 중금속의 용출율은 pH에 크게 의존적이고 원소에 따라 차이를 보였다. 카드뮴과 구리의 용출율은 pH가 증가함에 따라 감소한 반면, 납과 아연은 중성 또는 강알칼리성 조건에서 증가하는 것으로 나타났는데 중금속의 용출 거동이 용해도에 의해 제한됨을 나타내 준다. CEC가 중금속의 용출율에 미치는 영향은 pH와 비슷한 것으로 나타났다. 비산재의 입자크기 중에서 D_(10)은 KSLT법에 의한 중금속의 용출량과 음의 상관성을 나타내었다. Exchangeable fraction의 경우는 비산재의 CEC 값이 40 meq/100g 미만인 시료는 선형관계에 있지만, 그 외의 CEC 값에서는 비선형관계를 보여주었다. Our study was performed to evaluate the effect of leaching parameters including the physicochemical characteristics and the fractionated composition of heavy metals on the release of heavy metals in fly ash discharged from MSWI. Leaching parameters such as pH, CEC, particle size, and exchangeable fraction among the fractional composition classified by sequential extraction procedure are considered. The leaching rate of heavy metal released by KSLT method is largely dependent on the pH of fly ash. The effect of pH on the release of heavy metals is different from elements. It appears that the leaching rate of cadmium and copper decreases with increasing pH, While lead and zinc increases at the condition of neutral or strong alkali condition, which suggests that the leaching of heavy metals are limited by the solubility. It is found that the effect of CEC is similarly to that of pH. D_(10) among the particle size of fly ash is negative correlated with the concentration of heavy metals leached by KSLT method. In the case of exchangeable fraction, the leaching rate of heavy metals is linearly correlated with the exchangeable fraction for the fly ash below 40 meq/100g of CEC, but not related out of the range.
-
-
우식활성검사와 불소도포 병용이 유치우식증 예방사업에 미치는 효과
김진범,나수정,조영임 대한구강보건학회 2000 大韓口腔保健學會誌 Vol.24 No.1
The objective of the research was to evaluate the effect of caries prevention on deciduous teeth through caries activity tests and topical fluoride application to develop the efficient caries prevention strategy applicable to Korean children. First, the dental examination was done to detect caries for 2-6-year-old children at a children's house. The modified Snyder test to detect the ability of acid production by dental plaque using Snyder test medium and the test for the number of mutans streptococci in the saliva was applied to the 2-5-year-old children to predict the probability for future caries. With consideration of the results from caries activity tests, professional topical fluoride application and fluoride mouthrinsing therapy was applied for 1 year. More frequent fluoride application was used for the children who showed the higher probability of future caries. After 1-year preventive therapy, the effect of caries prevention on deciduous teeth was evaluated quantitatively by the caries activity tests and dental examinations. The results were as follows: 1. The reduction rate of dmfs index was 18.23% at 5-year-old children, 23.22% at 6-year-old children. 2. The reduction rate of pit and fissure surfaces among dmfs index was 19.62% at 4-year-old children, 13.53% at 5-year-old children, 6.92% at 6-year-old children. 3. The reduction rate of smooth surfaces among dmfs index was 21.57% at 5-year-old children, 34.52% at 6-year-old children. 4. The 1-year-increment of dmfs was significantly positive in proportion to dmfs index at basic examinations. 5. The dmfs index of basic examination was correlated significantly with the result of acid production test by dental plaque at 3-, 4- and 5-year-old children. The number of mutans streptococci in the saliva was significantly positively correlated with dmfs index of basic examination at 5-year old children. 6. The degree of acid production by dental plaque at basic examination was significantly positively correlated with the 1-year increment of dmfs index at 3- and 4-year old children. The number of mutans streptococci in the saliva at basic examination were significantly positively correlated with the 1-year increment of dmfs index at 5-year old children.
-
-
-
0.2% 불화나트륨 용액으로 3년간 양치한 초등학교 아동의 영구치 우식증 예방효과
김진범,나수정,손석환,심상수 대한구강보건학회 1999 大韓口腔保健學會誌 Vol.23 No.2
Supervised weekly fluoride mouthrinsing programme with a 0.2 percent neutral sodium fluoride solution has been implemented at primary schools in Pusan, Korea since 1995. 260,734 children of 253 schools join the fluoride mouthrinsing programme in 1998. To estimate caries preventive effect, epidemiologic dental survey was undertaken in 1998 for 9-year-old children joining the mouthrinsing programme for three school years until last year and 9-year-old children not joining the programme until last year. Subjects were 367 children joining the programme and 248 children in control schools. The obtained results were as follows. 1. Children who experienced caries on permanent teeth were 65.9% in fluoride mouthrinsing group and 78.2% in control group. 2. The DMFT scores were 2.10 in fluoride mouthrinsing group and 2.84 in control group. The difference of DMFT scores was 0.74 between fluoride mouthrinsing group and control group. The caries reduction rate was 26.1% by fluoride mouthrinsing programme. 3. Filled teeth among total DMFT scores were 35.2% in fluoride mouthrinsing group and 24.4% in control group. 4. The caries reduction rates were high at anterior teeth and low at upper and lower first molars by fluoride mouthrinsing programme. 5. The percentages of sound teeth at upper first premolars and upper and lower first molars in fluoride mouthrinsing group were significantly higher than control group. 6. The fluoride mouthrinsing programme should be developed at 4-to 5-year old children in nursery schools and all children in junior high schools as well as all primary schools.
-
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
