칼슘설포알루미네이트계 팽창재의 제조 및 기초 물성

전준영,송종택 한국세라믹학회 2000 한국세라믹학회지 Vol.37 No.4

The C4A3S clinker was prepared by the solid-state reaction. The mixture of raw materials; calcite, kaoline and gypsum, was fired at 135$0^{\circ}C$ for 1hr and cooled rapidly in air. C4A3S type expansive was made with C4A3S clinker, CaO and CaSO4. The cement replaced by 10 wt.% C4A3S type expansive was investigated by the measurement of the strength(compressive, tensile, flexural) and length change at various curing conditions. Hydration products were mainly ettringite, monosulfate and Ca(OH)2. The densification and the expansion due to the formation of ettringite during the hydration increased strength and reduced the drying shrinkage of hardened cement.

음경지속발기증 1례

전준영,박영요 한국의학사 1991 診斷과治療 Vol.11 No.8

고환 기형종

전준영,박영요 한국의학사 1991 診斷과治療 Vol.11 No.9

요도협착의 직히하 내요도 절개술시 Nd-YAG레이저와 Triamcinolone 국소주사의 병용요법

전준영,심봉석 大韓泌尿器科學會 1993 Korean Journal of Urology Vol.34 No.4

건이전술로 치료한 비부골 골절을 동반된 장 비골건 완전 파열 (증례 보고)

전준영,김형년,박용욱,Jeon, June Young,Dong, Quanyu,Kim, Hyong Nyun,Park, Young Wook 대한족부족관절학회 2013 대한족부족관절학회지 Vol.17 No.4

Fracture of os peroneum can occur, but the fracture fragments are seldom displaced. Complete rupture of peroneus longus through the fracture of the os peroneum causing displacement of the fracture fragments is not well reported in the literature. Differential diagnosis with bipartite os peroneum or calcific tendinitis is important because misdiagnosis of the tendon rupture can lead to serious sequela including chronic pain, ankle instability, and peroneal compartment syndrome. We report a case of complete rupture of peroneus longus associated with fracture of the os peroneum with a review of the literature.

치주인대 세포의 교원질 생성에 대한 Substance P의 효과

전준영 慶北大學校 齒科大學 1994 慶北齒大論文集 Vol.11 No.2

치주인대세포에서 neuropeptide 중 하나인 substance P의 교원질 생성에 대한 효과를 알아보고자, 발치한 제1소구치의 치주인대 세포를 배양하여 [3H]proline을 단백질에 편입시켜 collagenasedigestion법으로 교원질합성을 평가하고 또한 mRNA 수준에서 작용 효과를 보기 위하여 Nothern blot hybridizaton을 시행하여 다음과 같은 결과를 얻었다. . 비교원성 단백질, 교원성단백질 및 상대교원질 합성비에 가장 큰 효과를 나타내는 substance P의 농도는 10^-7M 이었다. . substance P는 치주인대 세포의 비교원질 단백질 합성을 증가시키나, 교원질의 합성은 감소시켜 상대 교원질의 합성을 7.0%에서 3.6%로 감소시켰다. . substance P의 교원질 억제 효과에는 Prostaglandins의 작용이 부분적으로 관여되어 있었다. . substance P는 교원질의 mRNA 수준에는 영향을 미치지 않았다. . substance P는 골아세포인 MC3T3-E1 세포에서는 교원질합성에 영향을 미치지 않았다. . substance P의 농도에 따른 gelatinase의 양적변동은 관찰되지 않았다. 이상에서 substance P는 치주인대세포의 교원질 생성을 선택적으로 억제하였으며 이러한 억제 효과는 prostaglandins과 연관이 있음을 알았다. Substance P is one of the neuropeptide which presents highly in tension site of periodontal ligament during the orthodontic tooth movement. It has been also known as one of the neurepoptides which cause neurogenic inflammation in various tissues and organs. However, there is no report about the effect of substance P on major extracellular matrix production by substance P in human periodontal ligament cell. The collagenase-digestion method was used to evaluate collagen production and also used Northern blot hybridization for the evaluation of collagen mRNA level. This study also included in terms of prostanglandins and gelatinase production with respect to collagen production. For the collagen degradation, zymography was used to estimate denatured collagen degradation. Dose-dependent effect of substance P on noncollagen protein collagen and percent collagen was that substance P increased noncollagen protein synthesis, but decreased collagen sythesis. So the percent collagen, which determined by relative collagen production against total protein production, was decreased from 7% to 3.6%. This inhibitory effect of substance P on collagen production was disappeared when cells were treated concomitantly with indomethacin. It means that substance P-induced inhibitory effect on collagen production was due at least in part to the production of prostaglandins. To evaluate whether substance P-induced inhibitory effect on collagen production is correspond to the steady-state levels of procollagen mRNA, Northern blot hybridization was performed and it showed that substance P has no effect on the steady-state level of α1(Ⅰ) procollagen mRNA. It means that the inhibitory effect of substance P on collagen production was due to the change of a certain mechanism after posttranscription. In this context, gelatinase production by substance P in periodontal ligament cells was evaluated by zymography. Zymogramshowed that substance P has no effect on gelatinase production in periodontal ligament cells. To explore whether substance P-inhibitory effect on collagen production is selective in periodontal ligament cells or not, MC3T3-E1 cells which originated from mouse calvaria was used. It showed that substance P has no effect on collagen production in MC3T3-E1 cells. Taken together, substance P inhibits collagen production in human periodontal ligament cells. This effect was not due to the change of the steady-state level of procollagen mRNA and gelatinase production, but due at least in part to the change of prostaglandins production.

[P3-59] 지누아리(Gratetoupia filicina) 첨가 전통고추장의 숙성 중 품질 변화

전준영,김대련,정인학 한국식품영양과학회 2007 한국식품영양과학회 학술대회발표집 Vol.2007 No.10

목적 외 수면활용중인 호소의 퇴적물 용출특성 분석

전준영,주진철,유자함,이민지,최선화,허남주 대한환경공학회 2017 대한환경공학회 학술발표논문집 Vol.2017 No.11

현장 Mesocosm 실험을 통한 수상태양광의 최적 차광면적 산출

전준영,주진철,허남주,최선화,허준욱 대한환경공학회 2018 대한환경공학회 학술발표논문집 Vol.2018 No.11

규산마그네슘 복합화를 통한 할로이사이트 기반 튜브형 담체의 메틸렌 블루 및 중금속 흡착능 향상 연구

전준영,전종록,신승구,이윤기 대한환경공학회 2023 대한환경공학회지 Vol.45 No.1

Objectives: Thermal stability of the halloysite and magnesium silicate is discussed in terms of microstructure and adsorption behavior to optimize their composite as an absorbent for methylene blue (MB) and heavy metal ions removal from an aqueous solution. Methods: Halloysite/magnesium silicate tubular composites with high adsorption capacity of methylene blue and heavy metal ions were prepared with extrusion and consequent firing. To define the firing temperature of the tubular media, The microstructure and the adsorption equilibrium characterized the thermal stability of the halloysite and the magnesium silicate Results and Discussion: The magnesium silicate used in this study shows broad peaks in x-ray diffraction; however, the treatment of 750℃ induces its crystallization. The specific surface area of the magnesium silicate is also gradually decreased along with the firing temperature increase. No significant degradation in methylene blue adsorption capacity for magnesium silicate is observed until 500℃-treatment. However, the higher firing temperature reduces the capacity: 14.0%P, 26.1%P, and 96.3%P decrease for 600℃, 700℃, and 750℃, respectively. Regardless of heat treatment, the Langmuir isotherm equation represents the adsorption equilibria well compared to the Freundlich model. The tubular media of the halloysite – 30 wt.% of magnesium silicate fired at 600℃ exhibits a high specific surface area of 115 m2 g-1 and a relative porosity of 43.5%. Compared to the halloysite-only tubular media, the adsorption capacity of the composites is significantly improved with the incorporation of magnesium silicate. The adsorption capacity of 168h for methylene blue is more than tripled, 29.8 mg g-1, and the adsorption capacity of Cr(III), Cu(II), and Zn(II) is also greatly enhanced by more than 4.8 times. Conclusions: Thermal stability of magnesium silicate is investigated for use as an additive adsorbent in terms of the microstructure and the adsorption capacity. Even at 600℃ of the firing temperature, magnesium silicate shows a higher specific surface area and higher adsorption capacity of MB compared to those of the halloysite; the adsorption fits well into Langmuir behavior. The addition of magnesium silicate into the halloysite media significantly enhances its adsorption capacity for MB and heavy metal ions such as Cr(III), Cu(II), and Zn(II). 목적: 본 연구는 향상된 메틸렌 블루 및 중금속 이온 제거 흡착능을 지닌 규산마그네슘-할로이사이트 복합 담체 제조를 위해 소재 및 담체의 열적 안정성 및 흡착 거동을 평가하였다. 규산마그네슘-할로이사이트 복합 담체를 제조하여 수용액으로부터 메틸렌 블루 및 중금속 이온 제거를 위한 흡착제로 활용하기 위해 소재의 열적 안정성 및 흡착능을 평가하였다. 방법: 메틸렌블루 및 중금속에 대해 높은 흡착능을 지닌 할로이사이트/규산마그네슘 관형 복합 담체가 압출 및 소성 공정을 통해 제조되었다. 미세구조 및 흡착 평형 분석을 통해 할로이사이트 및 규산마그네슘의 열적 안정성을 평가하였으며, 결과를 통해 관형 담체의 소성 온도를 결정하였다. 결과 및 토의: 규산마그네슘은 750℃ 소성 시 결정화가 진행되었으며, 비표면적은 소성 온도가 증가함에 따라 저감되었다. 저감된 규산마그네슘의 흡착능은 500℃ 소성까지는 유의미한 변화가 없었으나, 600℃, 700℃ 및 750℃ 열처리 시 각각 14.0%P, 26.1%P, 및 96.3%P 감소되었다. 열처리와 무관하게, 할로이사이트 및 규산마그네슘의 등온 흡착 데이터는 Langmuir 등온흡착식에 가장 잘 맞았다. 600℃소성된 할로이사이트-30 wt.% 규산마그네슘 복합 관형 담체는 115 m2 g-1 의 높은 비표면적 및 43.5%의 기공율을 나타내었으며, 168시간 메틸렌블루 흡착능이 29.8 mg g-1 을 나타내었다. 이는 할로이사이트 관형 담체 대비 3배 이상 증가한 값이며, Cr(III), Cu(II), 및 Zn(II)의 흡착능도 모두 4.8배 이상 향상되었다. 결론: 미세구조 및 흡착능의 관점에서 흡착제로서의 규산마그네슘의 열적 안정성이 평가되었다. 600℃열처리 후에도 규산마그네슘은 할로이사이트 대비 높은 비표면적 및 흡착능을 보여주었으며, 흡착은 Langmuir 거동을 보였다. 할로이사이트 담체의 규산마그네슘 복합화를 통해 메틸렌 블루 및 Cr(III), Cu(II), and Zn(II)흡착능이 대폭 향상되었다.