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황원중,권구중,이찬용,김남훈 강원대학교 삼림과학연구소 2001 Journal of Forest Science Vol.17 No.-
솔잎혹파리 피해 소나무재의 특성을 이해하고 효율적인 이용방법을 모색하기 위한 기초자료를 얻기위하여 솔잎흑파리 피해재의 해부 및 물리학적 성질을 조사하여 정상재와 비교 및 검토하였다. 그 결과, 솔잎혹파리 피해재는 정상재에 비해 축방향 수지구 및 수평수지구의 수가 많았고 위연륜이 출현하는 특징을 나타냈다. 또한 솔잎흑파리 피해재가 정상재보다 변 · 심재 모두 수축 · 팽윤율이 높았으며 변재부의 생재함수율은 정상재에 비해 다소 낮았다. 압축강도와 휨강도는 정상재보다 다소 낮았으나 전단강도는 거의 비슷한 값을 보여주었다. The objective of this work is to examine anatomical and physical characteristics of wood damaged by pine needle gall midge(PNGM, Thecodiplosis japonensis Uchida et Inouye) in Pinus densiflora. In anatomical characteristics, it was noted that the number of axial and radial resin canals in the damaged wood was higher than that in sound wood. In damaged wood, green moisture content of sapwood and swelling and shrinkage was higher than sound wood Both longitudinal compressive strength and bending strength of the damaged wood were lower than those of sound wood. On the other hand, shearing strength of damaged wood was similar to that of sound wood.Key word : Pinus densiflora, Thecodiplosis japonensis Uchida et Inouye, annual ring width, resin canal
권중구 ( Joong Goo Kwon ),박경식 ( Kyung Sik Park ),박정호 ( Jung Ho Park ),박재명 ( Jae Myung Park ),박철희 ( Cheol Hee Park ),이광재 ( Kwang Jae Lee ),박효진 ( Hyo Jin Park ),이종철 ( Jong Chul Rhee ) 대한소화기학회 2011 대한소화기학회지 Vol.57 No.2
Traditional symptom-based therapies of irritable bowel syndrome (IBS) are directed at the relief of individual IBS symptoms, but they are often of limited efficacy in addressing the entire symptom complex. Combinations of drugs to target bothersome symptoms are suggested as the first-line pharmacologic treatment. Increasing knowledge of the pathophysiology and molecular mechanisms of IBS has resulted in the development of several new therapeutic approaches. Thirteen consensus statements for the treatment of IBS were developed using the modified Delphi approach. Exclusion diets have modest efficacy in improving symptoms in some IBS patients. Symptom-based therapies with dietary fiber, bulking agents, laxatives, antispasmodics and laxatives are effective in the improvement of some individual symptoms, e.g. dietary fiber and bulking agents for constipation, laxatives for constipation, antispasmodics for abdominal pain and discomfort, antidiarrheals for diarrhea. 5HT3 receptor antagonists and 5HT4 receptor agonists are effective in the relief of global IBS symptoms and individual symptoms such as abdominal pain and abnormal bowel habits. A short term course of nonabsorbable antibiotics may improve global IBS symptoms, particularly in patients with diarrhea- predominant IBS. Some probiotics appear to have the potential benefit in improving global IBS symptoms. Selective C-2 chloride channel activator is more effective than placebo at relieving global IBS symptoms in patients with constipation-predominant IBS. Both tricyclic antidepressants and selective serotonin reuptake inhibitors are equally effective in relieving global IBS symptoms, and have some benefits in treating abdominal pain. Certain types of psychologic therapy may be effective in improving global symptoms in some IBS patients. Further studies are strongly needed to develop better treatment strategies for Korean patients with IBS. (Korean J Gastroenterol 2011;57:82-99)
권중구 ( Joong Goo Kwon ) 대한내과학회 2011 대한내과학회지 Vol.81 No.2
Diabetic gastroparesis is a complication that often occurs in long-standing diabetic patients and it is characterized by delayed gastric emptying and upper gastrointestinal symptoms. The pathophysiology of gastroparesis is complex and poorly understood but substantial advances in knowledge about it have been gained from experimental studies of gastric tissue in animal models and humans with diabetes. Several abnormalities in diabetes might result in gastroparesis, including autonomic neuropathy, enteric neuropathy, abnormalities of interstitial cells of Cajal and smooth muscle cells, acute hyperglycemia and psychological dysfunction. Scintigraphic measurement of solid emptying is regarded as gold standard diagnostic technique for comparison of newer diagnostic modalities such as ultrasound, breath test and MRI. The available therapeutic options include dietary modification, optimization of glycemia, pharmacological interventions, endoscopic treatment, and gastric electrical stimulation. The efficacy of current treatment remains suboptimal and the search for more specific and effective treatments will likely be needed. (Korean J Med 2011;81:174-184)
급성담관염의 원인균주와 항생제감수성의 시간흐름에 따른 변화
권정석 ( Jeong Seok Kwon ),한지민 ( Ji Min Han ),김태원 ( Tae Won Kim ),오지혜 ( Ji Hye Oh ),권현희 ( Hyun Hee Kwon ),정진태 ( Jin Tae Jung ),권중구 ( Joong Goo Kwon ),김은영 ( Eun Young Kim ),김호각 ( Ho Gak Kim ) 대한소화기학회 2014 대한소화기학회지 Vol.63 No.5
Background/Aims: We evaluated changes of causative pathogen in acute cholangitis and their antimicrobial susceptibility over six years and differences between community-acquired and hospital-acquired acute cholangitis at our institution. Methods: Medical records of 1,596 patients with acute cholangitis and biliary drainage between August 2006 and August 2012 were reviewed retrospectively. Cases were divided according to time: period 1 (August 2006-December 2008, n=645, 40.4%), period 2 (January 2009-August 2012, n=951, 59.6%). Cases were divided according to community-acquired cholangitis (n=1,397, 87.5%) and hospital-acquired cholangitis (n=199, 12.5%). Causative pathogens and antimicrobial susceptibility were investigated in each group. Results: Causative pathogen was isolated from bile culture in 1,520 out of 1,596 cases (95.2%). The three most frequently isolated Gram-negative bacteria were extended-spectrum beta-lactamase (ESBL)-producing Escherichia coli (n=485, 30.4%), E. coli (n=237, 13.2%), and Citrobacter freundii (n=110, 6.9%). Between periods 1 and 2, prevalence of ESBL-producing E. coli and Klebsiella pneumoniae did not show significant change (36.7% vs. 32.1%, p=0.073; 6.6% vs. 6.2%, p=0.732). C. freundii showed a significant increase from period 1 to period 2 (1.7% vs. 13.2%, p=0.000). In both time periods, imipenem was the antimicrobial agent showing the highest rate of susceptibility (93.3% vs. 93.9%, p=0.783). Higher prevalence of ESBL-producing E. coli and C. freundii was observed in the hospital-acquired cholangitis group (52.1% vs. 31.2%, p=0.000; 15.9% vs. 7.3%, p=0.001). Conclusions: The most common causative pathogen of acute cholangitis was ESBL-producing E. coli. Prevalence of C. freundii increased over the time period. Imipenem should be reserved as an alternative for resistant pathogens.
도시철도 지하역사 공기조화기의 미세먼지 저감성능 개선을 위한 사전연구
강중구(Joong-Goo Kang),신창헌(Chang-Heon Shin),배성준(Sung-Joon Bae),권순박(Soon-Bark Kwon),김세영(Se-Young Kim),한석윤(Seok-Yoon Han) 대한설비공학회 2008 대한설비공학회 학술발표대회논문집 Vol.2008 No.2
Particulate matter (PM) is one of the major indoor air pollutants especially in the subway station in Korea. In order to remove PM in the subway station, several kinds of PM removal system such as roll-filter, auto-washable air filter, demister, and electrostatic precipitator are used in the air handling unit (AHU) of subway station. However, those systems are faced to operation and maintenance problems since the filter-regeneration unit consisting of electrical or water jet parts is malfunctioned due to the high load of particulates and the filter material needs periodic replacement. In this study, we surveyed the particle removal systems in order to develop the new system of particle removing can be adopted in the current AHU of subway station.