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Al(III) 응집제의 염기도에 따른 총인 제거효율의 변화
한승우,이철희,이재관,강임석,Han, Seung-Woo,Lee, Chul-Hee,Lee, Jae-Kwan,Kang, Lim-Seok 대한상하수도학회 2012 상하수도학회지 Vol.26 No.2
염기도를 달리하여 제조된 PACl에 대한 Al(III)종 분포는 염기도가 높을수록 monomeric Al(III)종은 적어지고, precipitate Al(III)종은 증가하는 것으로 나타났다. 염기도 13.6%의 경우에서는 monomeric Al(III)종이 81%, polymeric Al(III)종이 19%, precipitate Al(III)종은 0%로 monomeric Al(III)종이 주종을 이루고 있었다. 염기도 13.6%의 경우에서 재안정화 없이 80% 정도의 탁도제거 효율을 유지하고 있었으며, $UV_{254}$ 제거효율이 향상되는 것은 낮은 응집 pH 범위에서 유기물 응집효과가 우수하게 나타나기 때문으로 판단된다. 그리고 13.6% 염기도를 가진 PACl이 T-P 제거효율 및 $PO_{4}-P$의 제거효율이 가장 우수한 것으로 나타났으며 이는 높은 monomeric Al 성분에 기인하리라 판단된다. The analysis of Al (III) hydrolysis species with PACls prepared by different basicity showed that mononmeric Al species were reduced while precipitate Al species were increased with an increase in basicity for PACls. In the case of the PACl with 13.6% basicity, monomeric Al species were 81%, polymeric Al (III) species 19%, precipitate Al (III) species was 0%, as showing the dominant monomeric Al species. The PACl with 13.6% basicity showed above 80% of turbidity removal efficiency without any restabilization. In addition, the PACl with 13.6% basicity showed higher organic removal expressed by $UV_{254}$ which was caused by lower coagulation pH. The PACl containing the higher amount of monomeric Al species was the most beneficial for T-P and $PO_{4}-P$ removal.
가토 악하선 도관 결찰과 절단 후 악하선 세포의 증식에 관한 전자 현미경 및 면역조직화학적 연구
한승우,김경욱,이재훈,Han, Seung-Woo,Kim, Kyung-Wook,Lee, Jae-Hoon 대한악안면성형재건외과학회 1998 Maxillofacial Plastic Reconstructive Surgery Vol.20 No.4
Obstructive sialadenitis of major salivary glands is a common entity that occurs either in sialolithiasis or in foreign-body obstruction of the excretory ducts. This is characterized histologically by the presence of duct-like structural groups in a highly fibrotic stroma. Although the pathologic features are well recognized, the various cell types involved in the atrophy and subsequent regeneration of the obstructed salivary gland have been controversial. For this reason, an animal model of obstructive sialadenitis that induced atrophy in the salivary gland was used. Experimental study was performed to observe changes of submandibular gland in rabbit and apply the results to clinical activity. Forty-five rabbits each weighing about 3Kg were used and divided into control and experimental group. In the experimental group, ducts of submandibular gland was ligated and cutted divided into each twenty rabbits. Rabbits were serially sacrificed on the 3rd, 5th, 14th, 30th day of experiment. The submandibular glands were dissected out at sacrifice and stained with H&E, MT, immunohistochemical stain and the histological examinations were carried out under the light and transmission electron microscope. After examination and comparison of all specimens, the results of this study were as follows: 1. In the features of H&E stain, moderate infiltration of inflammatory cell were present at 3rd day of experiment. The features of ductal metaplasia was observed after 7th day in the ligation group and destructive changes was continued. In the cutting group, atrophic changes were less severe than ligation group but the small ductule were separated from stroma after 7th day. 2. In the feature of MT stain, apposition of connective tissue was increased in all group, more active in ligation group. 3. In the features of immunohistochemical stain, ligation group showed increased PCNA positive response at 7th day and the higher activity of duct cells was observed. Severance group showed more PCNA positive response than ligation group at 30th day. 4. In TEM features, ductal metaplasia was started at 7th day and degenerative change with margination of nucleus had been severe. Although ductal metaplasia was seen in the severance group, more numerous granule in different size was founded than ligation group. From above results, degenerative change was identified with ductal metaplasia, apically apposition of granule, r-ER destruction in ligation group. Severance of duct elicit degenerative change of grandular cells but the change was less severe than ligation group and more PCNA positive cell was founded at acinar cell.
수처리용 Fe(III)계 응집제의 특성 및 응집특성 비교
한승우(Seung Woo Han),강임석(Lim Seok Kang) 大韓環境工學會 2016 대한환경공학회지 Vol.38 No.4
수처리용 응집제로서 미리 가수분해시켜 고분자성 Fe(III)의 이용과 제조에 대한 연구에서, Ferron 분석법을 통해 Fe(III) 응집제내에 함유된 가수분해종을 정량화하고 그 차이를 살펴보았다. 제조된 PICl (polymeric iron chloride) 중에서 r=1.5의 경우에서 가장 많은 20%의 고분자성 Fe(III)종을 함유하고 있는 것으로 나타났다. 응집 실험은 r 값에 따라 제조된 응집제를 이용하여 응집제 주입량과 응집 pH의 조건을 달리하여 수행하였다. FeCl₃ (r=0.0)와 PICl (r=0.5, 1.0, 1.5)를 이용한 응집 특성 비교에서, PICl (r=0.5, 1.0, 1.5)에서 FeCl₃ (r=0.0) 보다 유기물 제거에 효과적인 것으로 나타났다. 응집 pH에 따른 응집 실험에서도 PICl의 경우에서 pH에 대한 영향이 적게 나타났으며, 폭 넓은 응집 pH(pH 4-9)에서 탁도와 유기물 제거효율이 높은 것으로 나타났다. This research explored the feasibility of preparing and utilizing preformed polymeric solution of Fe(III) as coagulants for water treatment. The differentiation and quantification of hydrolytic Fe(III) species in coagulant was done by utilizing spectro-photometric method based on the interaction of Fe(III) with Ferron as a complexing agent. The properties of the synthesized polymeric iron chloride (PICl) showed that the quantity of polymeric Fe(III) produced at r=1.5 was 20% of the total iron in solution, as showing maximum contents. Coagulation experiments were conducted under the condition of various coagulant doses and pH for each coagulant prepared. From the comparison of the characterization of coagulation for FeCl₃ (r=0.0) and PICl (r=0.5, 1.0, 1.5) coagulants, PICl (r=0.5, 1.0, 1.5) coagulants was found to be more effective than other coagulant for the removal of organic matters. The experimental results for the coagulation tests at various pH ranges showed that the PICl was least affected by the coagulation pH and PICl was very effective for the removal of turbidity and organic materials over wide pH range (pH 4-9) tested.
PACl 응집제의 특성 및 기타 Al ( 3 ) 계 응집제와의 응집특성 비교
한승우(Seung Woo Han),강임석(Lim Seok Kang) 한국물환경학회 1999 한국물환경학회지 Vol.15 No.3
Various Al(Ⅲ) solutions having different r (OH_(added)/Al) values and chemical species compositions were prepared and physical arid chemical characteristics of PACls solutions were examined. Then, the prepared PACls were compared with other Al(Ⅲ) coagulants for coagulation characteristics in water treatment process. The addition of NaOH to the supersaturated AlCl₃ solutions made it possible to synthesize the different types of PACls useful for water treatment. The result of the analysis by timed spectrophotometer with a color developing reagent (ferron) showed that r (OH_(added)/Al), initial aluminum concentration, and base concentration significantly influenced the hydrolytic compositions of aluminum in PACls, but revealed that Al species distribution of PACls was little affected by the base injection rate ranging from 21.5 ㎖/hr to 60 ㎖/hr. Coagulation test of synthetic water showed that the effect of coagulation pH on turbidity removal was severer for low r ratio PACls, alum, and AlCl₃. Also, the effect of pH for coagulation of Nakdong river water showed that each Al(Ⅲ) coagulant had different effects on turbidity and TOC removal. Especially, PACls were least affected among other Al(Ⅲ) coagulants used.
한승우(Han Seung Woo) 한국국제회계학회 2003 국제회계연구 Vol.9 No.-
This paper study on the financial information in Korea financial institution. The first, study on the financial market and information. The process of the financial information is 4 steps in Korea financial institution. The second study on the business propel of financial information in Korea financial institution. The study on the electronic money, electronic bill presentment and payment, internet banking, electronic business exchange B to B, electronic information exchange system and call center the mate customer. The method of the study is literature survey. The future research is emprical study in financial institution and value.
자기조립 단분자막을 이용한 MOSFET형 단백질 센서의 제작 및 특성
한승우 ( Seung Woo Han ),박근용 ( Keun Yong Park ),김민석 ( Min Suk Kim ),김홍석 ( Hong Seok Kim ),배영석 ( Young Seuk Bae ),최시영 ( Sie Young Choi ) 한국센서학회 2004 센서학회지 Vol.13 No.2
N/A Protein and gene detection have been growing importance in medical diagnostics. Field effect transistor (Phi`) - type biosensors have many advantages such as miniaturization, standardization, andmass-production. In this work, we have fabricated metal-oxide-semiconductor (MOS) FET that operates as molecular recognitions based electronic sensor. Measurements were taken with the devices under phosphate buffered saline solution. The drain current (I_(D)) was decreased after forming self-assembled mono-layers (SAMs) used to capture the protein, which resulted from the negative charges of SAMs, and increased after forming protein by 11,5% at V_(G)= 0 V due to the positive charges of protein.