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불소적용시 법랑질과 상아질에서 불화칼슘형성의 차이에 관한 실험적 연구
김재곤,권선자,윤현두,안수현,백병주 大韓小兒齒科學會 1998 大韓小兒齒科學會誌 Vol.25 No.1
The purpose of this study was to compare the amount of calcium fluoride deposited on the enamel and dentin surface and to obtain information on the morphological change and crystallographic details of mineral deposition after 12,000ppm APF application in vitro. The bovine enamel and dentin blocks were randomly assigned to eight groups according to artificial caries lesion formation and difference of fluoride application time. The fluoride concentration and morphological characteristics on the treated enamel and dentin surface were investigated by using fluoride quantitative analysis and SEM. The powdered enamel and dentin of the intact bovine incisors were prepared for the X-ray diffraction analysis. The following results were obtained. 1. The amounts of KOH-soluble fluoride on the carious enamel and dentin surface after 24h APF application were higher than after only 5min APF application(P<0.05), but in the case of the sound enamel and dentin surface were similar after 5min and 24h application (P>0.05). The fluoride content was highly increased in the carious dentin as compared with sound dentin after APF application(P<0.05). 2. The caruous enamel surface after APF application, the demineralized enamel surface were recovered a more dense enamel surface and precipitation of crystal was observed a distintive surface layer of spherical globules of about 1 m diameter. In the case of the fluorided carious dentin surface, precipitation of calcium fluoride-like material was deposited both inside the dentinal tubules as well as in the intertubular regions. 3. The crystallographic structure of powdered enamel and dentin after 24h APF application had large crystallities of apatite and CaF2 diffraction peaks in the enamel as compared with dentin. The diffraction data collected from the 27.50-29.50(2) angular range of the powdered enamel, the (105) apatite, (225) apatite and (111) CaF2 peaks of the enamel crystallities were detected after 24h APF application.
윤선애 ( Yun Seon Ae ),안석주 ( An Seog Ju ),우제영 ( U Je Yeong ),김석영 ( Kim Seog Yeong ),윤영석 ( Yun Yeong Seog ),방병기 ( Bang Byeong Gi ) 대한내과학회 1992 대한내과학회지 Vol.42 No.5
Recently, we have experienced 4 cases of successful pregnancies in renal allograft recipients. There were no rejection of allograft, congenital anomaly and intrauterine growth retardation. Our finding suggest that we can be reasonably optimistic about the outcome of pregnacy in patient with a well functioning renal transplant. But we think it is important to control blood pressure strictly during pregnancy and more safe to wait at least 2 years following transplant before becoming pregnant.
포스터 발표 : 일차성 갑상선기능저하증 및 일차성 부신기능저하증이 합병된 환자에서 발생한 횡문근융해증 및 IgA신증 1예
장윤경 ( Jang Yun Gyeong ),장인선 ( Jang In Seon ),최범순 ( Choe Beom Sun ),신영신 ( Sin Yeong Sin ),진동찬 ( Jin Dong Chan ),김석영 ( Kim Seog Yeong ),장윤식 ( Jang Yun Sig ),방병기 ( Bang Byeong Gi ),서광선 ( Seo Gwang Seon ) 대한신장학회 2003 춘계학술대회 초록집 Vol.22 No.1
WO3 and MoO3 Addition Effect on V2O5 / TiO2 as Removal of NOx and SOx from Stationary Sources
Byeong Seon Shin,Sang Yun Lim,Suk Jin Choung 한국화학공학회 1995 화학공업과 기술 Vol.13 No.1
N/A As an attempt to improve the catalytic activity at higher reaction temperatures between 300-450℃, various mole ratios of WO₃, were added to V₂O_5, TiO₂ catalytic systems. And also, in order to suggest a new mixed oxide catalyst system for simultaneous removal of NO_x, and SO_x from stationary sources, MoO₃V₂O_5/TiO₂ catalysts were prepared by a conventional impregnation method together with a newly introduced method of surface fixation(non-aqueous solution method). In case of WO₃, addition, at higher reaction temperature range(300-450℃), WO₃ and WO₃V₂O_5/TiO₂ catalysts showed significant high conversion in NO reduction with NH₃, while V₂O_5/TiO₂ catalyst showed a significant change in selectivity mainly due to the excess side reaction of NH₃ oxidation. This difference in selectivity due to NH₃ oxidation at high temperature is supposed to be associated with the difference in values of surface excess oxygen between WO₃, and V₂O_5 on titania. The surface acidifies of tested catalysts were relatively well correlated with the conversion of NO at 400℃. In case of MoO₃, addition, the catalytic activity for th simultaneous removal of NO_x, and SO_x, were quite enhanced by the addition of MoO₃ into V₂O_5/TiO₂ catalysts. The enhanced activities were responsible for the formation of Mo=O bond on the intermediate species produced by solid solutions on MoO₃V₂O_5/TiO₂, (aqueous). However, in the case of MoO₃V₂O_5/TiO₂ (non-aqueous), the exact source of active site was not able to detect in IR spectra in spite of more enhanced activity was obtained in this study. After SO₂, contant. VOSO₄ is newly formed on the surface of catalyst, which supposed to be associated with the activity enhancement.
Use of low-dose sulodexide in IgA nephropathy patients on renin-angiotensin system blockades
( Byeong Yun Yang ),( Hee Seon Lee ),( Sang Heon Song ),( Ihm Soo Kwak ),( Soo Bong Lee ),( Dong Won Lee ),( Eun Young Seong ) 대한신장학회 2012 Kidney Research and Clinical Practice Vol.31 No.3
Background: Despite using renin-angiotensin system (RAS) blockades, some of the patients with immunoglobulin A (IgA) nephropathy often had persistent proteinuria of more than 500 mg/d. They need to be managed further by alternative methods to halt the progression of the disease; these methods could also be applied safely over a long period of time. In this context, sulodexide has been studied for the management of diabetic nephropathy. Methods: A retrospective review was carried out involving 20 patients with IgA nephropathy who had been taking sulodexide (50 mg daily) as an add-on therapy together with an optimal dose of RAS blockades during 2008-2009. We evaluated the proteinuria reduction rates and renal function changes. Results: During 11.1±72.7 months of follow-up duration, urinary protein-to- creatinine ratio(UPCR) decreased for 1.57±0.6 to1.17±0.7 g/g (P=0.032). Twenty-five percent of the patients showed a greater than 50% reduction of UPCR, and 40% had a UPCR of less than 1.0 g/g at their final observations. The analysis of the factors contributing to the effect found that a higher pretreatment UPCR showed a significant correlation with the UPCR decrease (r=0.45, P=0.047). Neither the adverse effects nor the renal function impairments were documented during the management. Conclusion: Low-dose sulodexide has an additional modest antiproteinuric effect on IgA nephropathy undergoing RAS blockade therapy.