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지각과민 완화제 함유 치약의 노출 상아세관 폐쇄효과에 대한 주사 전자현미경적 관찰
송덕한,김종여,정진형 단국대학교 치의학연구소 1995 논문집 Vol.7 No.1
After root surface denudation due to periodontitis or periodontal surgery, many patients complain of hypersensitivity. The main reason for this is thought to be, opening of dentinal tubules after denudation of dentin. Thus, the sealing effect on dentinal tubules of denuded root surfaces by desensitizing agent containing dentifrice, which is commonly used to relieve and restrain hypersensitivity, was observed. To do this the premolars of healthy humans were curettaged and etched to open dentinal tubules and then desensitizing agent containing dentifrice was applied to the root surface and observed with SEM. The results are as following. 1. On the control group, opened dentinal tubules could be seen on the root surface. 2. In the group applied with microcrystalline HA containing dentifrice, all the opened dentinal tubules and the root surface were obstructed and dentifrice covered the entire surface of the root. 3. In the group applied with strontium chloride containing dentifrice, obstruction of the opened dentinal tubule on the root surface could also be seen. 4. In the group applied with desensitizing agent containing dentifrice, besides showing obstruction of all the dentinal tubules, root surface covered with even thickness of dentifrice could also be seen.
송덕만,최종만 울산대학교 1994 공학연구논문집 Vol.25 No.2
본 연구의 목적은 석유화학산업 지역에서 악취의 외부이동을 감축하기위한 방법론을 개발하고 악취제어사례를 예견하거나 석유화학산업 지역에서 악취영향을 점검하기 위한 악취오염 방지 및 관리전략 수립시 예비지침을 제공하기 위한 것이다. 실제 기상자료와 악취발생원강도를 ISCST 분산모델에 입력시켜 착지점에서의 악취농도수준(o. u.)을 계산할 수 있었다. 본 모델링연구는 1 악취단위전략과 악취완충거리의 개념을 도입하여 석유화학산업 지역에서의 악취제거 및 예측을 수행하는 독특한 방법이라 할 수 있다. 결론적으로, 1 악취단위전략과 악취완충거리 개념을 도입하여 풍하거리에 따른 지표면 악취 농도수준을 예측하는 악취 분산모델링 방법론은 공단에서 배출된 악취오염물질의 제어 및 예측을 위해 악취저감 대책을 위한 전략수립시 예비지침서로 사용될 수 있을 것이다. The objective of this study is to create a methodolgy for reductions in off-site odor migrations at petrochemical industrial sites, and to provide the preliminary guideline in predicting the odor control episodes or in establishing the odor pollution prevention and management strategies for review of odor impact at petrochemical industrial sites. By incorporating the actual meteorological data and odor source strength into the ISCST dispersion model, odor concentration levels(o. u.) at receptors could be calculated. This odor modeling study is a unique approach to odor control and predictions at petrochemical industrial sites using 1 odor unit strategy and odor buffer distance concepts. Consequently, this odor dispersion modeling methodology predicting the ground-level downwind plume centerline odor concentration levels by using 1 odor unit strategy and odor buffer distance concepts can be used as a preliminary guideline in establishing odor reduction management strategy for odor control and prediction at industrial complex sites.