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A case of peritoneal dialysis-associated peritonitis by Rothia mucilaginosa
( Byeong Gwan Kim ),( A Young Cho ),( Sang Sun Kim ),( Seong Hee Lee ),( Hong Shik Shin ),( Hyun Ju Yoon ),( Jeong Gwan Kim ),( In O Sun ),( Kwang Young Lee ) 대한신장학회 2015 Kidney Research and Clinical Practice Vol.34 No.3
Rothia muciliaginosa (R. mucilaginosa) is a facultative, Gram-positive coccus that is considered to be part of the normal flora of the mouth and respiratory tract. There are sporadic reports of the organism causing endocarditis in patients with heart valve abnormalities, as well as meningitis, septicemia, and pneumonia associated with intravenous drug abuse. However, it is an unusual pathogen in cases of peritoneal dialysis (PD)-associated peritonitis. Although R. mucilaginosa is generally susceptible to penicillin, ampicillin, cefotaxime, imipenem, rifampicin, and glycopeptides, there are no guidelines for the treatment of PD-associated peritonitis. Herein, we report a case of PD-associated peritonitis due to R. mucilaginosa that was resolved with intraperitoneal antibiotic treatment.
크론병에서 항문 주위 병변의 임상상과 치료에 대한 반응
김현대 ( Kim Hyeon Dae ),김찬규 ( Kim Chan Gyu ),김지원 ( Kim Ji Won ),김상균 ( Kim Sang Gyun ),김병관 ( Kim Byeong Gwan ),김주성 ( Kim Ju Seong ),정현채 ( Jeong Hyeon Chae ),송인성 ( Song In Seong ) 대한소화기학회 2003 대한소화기학회지 Vol.42 No.2
Background/Aims: The aim of this study was to assess the clinical features and therapeutic responses of perianal lesions in Crohn`s disease. Methods: We retrospectively reviewed medical records of 94 cases with perianal lesions among 231 cases registered as Crohn`s disease in Seoul National University Hospital between January 1975 and June 2001. The cases were investigated after dividing into two different groups. One group included the cases registered between January 1975 and December 1996 and the other group between January 1997 and June 2001. Results: The perianal lesions were observed in 41% of the cases. Perianal lesions were more frequent in colonic Crohn`s disease after 1997, but not before 1996. Fistula was significantly prevalent, followed by abscess, fissure, and stricture. Perianal lesions preceded intestinal symptoms such as abdominal pain and diarrhea in 25% of the cases. The remission rate with non-specific conservative treatment (10%) was lower than that before 1996. The remission rate after specific treatment (77%) was higher than that after surgery (53%). In cases of specific treatment, cumulative relapse rates were 7% in 1 year and 39% in 5 years. Conclusions: Crohn`s disease should be considered in young male patients who have the refractory perianal lesions. Perianal lesions should be managed initially with medical treatment. (Korean J Gastroenterol 2003;42:128-133)
유당분해효소 결핍증의 진단을 위한 십이지장 점막의 자당분해효소 대 유당분해효소 활성도 비
김병관(Byeong Gwan Kim),김선미(Sun Mi Kim),김유선(You Sun Kim),문선희(Sun Hi Moon),이국래(Kook Lae Lee),정현채(Hyun Chae Jung),송인성(In Sung Song),김정룡(Chung Yong Kim) 대한소화기학회 1997 대한소화기학회지 Vol.29 No.2
N/A Background/Aims: Jejunal biopsy with direct quantitative analysis of mucosal enzyme activities is the standard diagnostic method of lactase deficiency. But this test is seldom used in the clinical setting, because it is incovenient and cumbersome. On the contrary, sucrase to lactase activities ratio in duodenal mucosa is easy to measure and comp]iant with patients. We performed this study to investigate the value of sucrase to lactase activities ratio in duodenal mucosa as a diagnostic method of lactase deficiency. Methods: The 36 cases(22 men, 14 women) of this study were selected from healtby adults free from gastrointestinal symptom. We performed H breath test and syptom analysis after lactose load. And then, we obtained the duodenal mucosa by endoscopic biopsy and measured enzyme activities of the duodenal mucosa. Results: In 36 subjects, there were 21 subjects(58%) who had the intolerant symptoms and had more than a 20ppni increase in breath hydrogen. Sucrase to lactase activities ratio of the 21 subjects was more than 8. By the definition of sucrase to lactase activities ratio, the prevalence of lactase deficiency was 86 percent. This result was sirnilar to the previous prevalence(84%) defined by jejunal mucosa enzyme assay in Korean adults. Conclusion: Sucrase to lactase activities ratio of duodenal mucosa is a useful diagnostic tool for lactase deficiency. (Korean J Gastroenterol 1997;29:175 -181)
수용성 단백질로 활성화된 호중구에 대한 Rebamipide 의 효과
김주성(Joo Sung Kim),김정목(Jung Mogg Kim),김병관(Byeong Gwan Kim),김상균(Sang Gyun Kim),김지원(Ji Won Kim),김찬규(Chan Gyoo Kim),정현채(Hyun Chae Jung),송인성(In Sung Song) 대한소화기학회 2002 대한소화기학회지 Vol.39 No.1
Background/Aims: Helicobacter pylori (H. pylori) infection induces persistent neutrophil infiltration in gastric mucosa. The expression of cyclooxygenase (COX)-2 and inhibition of apoptosis in the neutrophils could contribute to the pathogenesis of H. pylori infection. Rebamipide, a mucosal protective and ulcer-healing drug, has been known to inhibit neutrophil activation. The aim of this study was to evaluate the effect of rebamipide on the neutrophils activated by Helicobacter pylori water-soluble proteins. Methods: After neutrophils were stimulated with H. pylori water extract (HPWE) or pretreated with rebamipide, the expression of COX-2 mRNA and protein was assessed by quantitative RT-PCR and Western blotting, respectively. Prostaglandin (PG) E2 synthesis was determined by radioimmunoassay. Neutrophil apoptosis was evaluated by cytosolic oligonucleosome-bound DNA ELISA and caspase-3 activity was measured by the detection of p-nitroanilide after cleavage from labeled substrate. Results: Stimulation with HPWE upregulated COX-2 expression and PGE2 secretion, and inhibited neutrophil apoptosis. Rebamipide suppressed PGE2 secretion from neutrophils in a dose-dependent manner. However, rebamipide did not affect neutrophil apoptosis and caspase-3 activity. Conclusions: Rebamipide effectively suppresses PGE2 secretion from neutrophils activated by H. pylori water-soluble proteins. This is another possible mechanism of gastric mucosal protection by rebamipide. (Korean J Gastroenterol 2002;39:13-21)
염증성 장질환에서 IL-10과 TNF-α 유전자의 단염기 다형성
김지원 ( Ji Won Kim ),김찬규 ( Chan Gyoo Kim ),김현대 ( Hyeon Dae Kim ),김병관 ( Byeong Gwan Kim ),김태호 ( Tae Ho Kim ),이국래 ( Kook Lae Lee ),이동호 ( Dong Ho Lee ),김주성 ( Joo Sung Kim ),정현채 ( Hyun Chae Jung ),송인성 ( In 대한소화기학회 2002 대한소화기학회 춘계학술대회 Vol.2002 No.-
<목적> 염증성 장질환의 병태생리에 중요한 역할을 하는 IL-10과 TNF-α유전자의 단염기 다형성과 염증성 장질환과의 연관성을 살펴봄으로써 염증성 장질환의 발생에 관여하는 유전적 원인을 규명하고자 하였다. <방법> 궤양성 대장염 환자 76명(남 37, 여 39), 크론병 환자 60명(남 41, 여 19)과 정상 대조군 203명(남 1129, 여 84)을 대상으로 혈액을 채취하였다. IL-10 유전자 촉진자의 일부인 ?082, -819,-592 및 +1
Stretchable and transparent electrodes based on in-plane structures
Kim, Kukjoo,Kim, Joohee,Hyun, Byung Gwan,Ji, Sangyoon,Kim, So-Yun,Kim, Sungwon,An, Byeong Wan,Park, Jang-Ung The Royal Society of Chemistry 2015 Nanoscale Vol.7 No.35
<P>Stretchable electronics has attracted great interest with compelling potential applications that require reliable operation under mechanical deformation. Achieving stretchability in devices, however, requires a deeper understanding of nanoscale materials and mechanics beyond the success of flexible electronics. In this regard, tremendous research efforts have been dedicated toward developing stretchable electrodes, which are one of the most important building blocks for stretchable electronics. Stretchable transparent thin-film electrodes, which retain their electrical conductivity and optical transparency under mechanical deformation, are particularly important for the favourable application of stretchable devices. This minireview summarizes recent advances in stretchable transparent thin-film electrodes, especially employing strategies based on in-plane structures. Various approaches using metal nanomaterials, carbon nanomaterials, and their hybrids are described in terms of preparation processes and their optoelectronic/mechanical properties. Some challenges and perspectives for further advances in stretchable transparent electrodes are also discussed.</P>
An, Byeong Wan,Hyun, Byung Gwan,Kim, So-Yun,Kim, Minji,Lee, Mi-Sun,Lee, Kyongsoo,Koo, Jae Bon,Chu, Hye Yong,Bae, Byeong-Soo,Park, Jang-Ung American Chemical Society 2014 NANO LETTERS Vol.14 No.11
<P>Transparent electrodes that can maintain their electrical and optical properties stably against large mechanical deformations are essential in numerous applications of flexible and wearable electronics. In this paper, we report a comprehensive analysis of the electrical, optical, and mechanical properties of hybrid nanostructures based on graphene and metal nanotrough networks as stretchable and transparent electrodes. Compared to the single material of graphene or the nanotrough, the formation of this hybrid can improve the uniformity of sheet resistance significantly, that is, a very low sheet resistance (1 Ω/sq) with a standard deviation of less than ±0.1 Ω/sq, high transparency (91% in the visible light regime), and superb stretchability (80% in tensile strain). The successful demonstration of skin-attachable, flexible, and transparent arrays of oxide semiconductor transistors fabricated using hybrid electrodes suggests substantial promise for the next generation of electronic devices.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/nalefd/2014/nalefd.2014.14.issue-11/nl502755y/production/images/medium/nl-2014-02755y_0005.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nl502755y'>ACS Electronic Supporting Info</A></P>
1 차 약제에 내성을 보인 결핵성 장염에서 2 차 약제로 완치된 1 예
고병성(Byeong Seong Ko),김병관(Byeong Gwan Kim),김주성(Joo Sung Kim),정현채(Hyun Chae Jung),송인성(In Sung Song) 대한소화기학회 2002 대한소화기학회지 Vol.39 No.4
Recently, the incidence of pulmonary tuberculosis has increased. In addition, extrapulmonary tuberculosis and multi-drug resistant tuberculosis have also increased. We experienced a 34-year-old male with intestinal tuberculosis which failed to respond to primary anti-tuberculosis therapy. He presented with loose stool, abdominal pain, and weight loss. The caseating granuloma was histologically found. The patient had taken primary anti-tuberculosis drugs for 13 months. However, his symptoms and weight loss did not improve. A colonoscopy showed multiple shallow geographic ulcerations in the cecum and ileocecal valve. Histopathologic examination also showed caseating granuloma. We started primary anti-tuberculosis therapy (isoniazid, rifampin, ethambutol, pyrazinamide), but follow-up colonoscopic findings after 2 months revealed no change of multiple ulcerations. After conversion of anti-tuberculosis therapy from primary drugs to secondary rescue regimen (prothionamide, cycloserine, para-aminosalicylic acid, levofloxacin, streptomycin), the patient's symptoms have improved. A follow-up colonoscopy revealed only scarring change in the cecum. (Korean J Gastroenterol 2002;39:299-303)
추천시스템을 위한 내용기반 필터링과 협력필터링의 새로운 결합 기법
김병만(Byeong Man Kim),이경(Qing Li),김시관(Si-Gwan Kim),임은기(En Ki Lim),김주연(Ju-Yeon Kim) 한국정보과학회 2004 정보과학회논문지 : 소프트웨어 및 응용 Vol.31 No.3
엄청난 속도로 증가하고 있는 정보의 홍수 시대에서는 정보들을 선별하기 위하여 정보 필터링기법이 필요하다. 정보 필터링은 내용 기반 방법과 협력에 의한 방법으로 분류할 수 있다. 내용 기반 기법에서는 내용에 기반을 두어 정보를 추출하는 반면 협력 기법은 다른 사람들의 의견을 이용하게 된다. 본 논문에서는 기존 협력 필터링 방법의 문제점을 해결하기 위한 방법의 일환으로 내용 기반 기법과 협력 기법을 보다 유기적으로 결합시키는 연구를 수행하였다. 이를 위해 협력 필터링 틀을 그대로 유지하면서 사용자 프로파일을 효과적으로 이용하는 방법을 제안하였다. 또한, 본 논문에서 제시한 기법을 실험적으로 분석하고 기존의 필터링 기법과 비교하였다. 실험 결과, 본 방법이 예측 질 면에서 상당한 성능 향상이 있었고 새로운 사용자에게도 보다 나은 추천을 할 수 있음을 알 수 있었다. With the explosive growth of information in our real life, information filtering is quickly becoming a popular technique for reducing information overload. Information filtering technique is divided into two categories: content-based filtering and collaborative filtering (or social filtering). Content-based filtering selects the information based on contents; while collaborative filtering combines the opinions of other persons to make a prediction for the target user. In this paper, we describe a new filtering approach that seamlessly combines content-based filtering and collaborative filtering to take advantages from both of them, where a technique using user profiles efficiently on the collaborative filtering framework is introduced to predict a user's preference. The proposed approach is experimentally evaluated and compared to conventional filtering. Our experiments showed that the proposed approach not only achieved significant improvement in prediction quality, but also dealt with new users well.