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정양호,조정구 圓光大學校 醫科學硏究所 1987 圓光醫科學 Vol.3 No.2
Central diabetes insipidus results from a lack of sufficient ADH to effect water conservation. The disease is identified by persistence of an inappropriately dilute urine in the presence of strong osmotic or nonosmotic stimuli to ADH secretion, absence of renal concentrating defects, and a rise in urine osmolality upon administration of vasopressin. We experienced a case of 29-year old male with persistent polyuria, thirst, and polydipsia due to central diabetes insipidus. The maximal urine osmolality with dehyrdation was 381 mosm/㎏ and urine osmolality was increased by only 26% after vasopressin injection. The serum osmolality at the time of vasopressin injection was 296 mosm/㎏. So we present this case with a review of literatures.
정양호,김재필 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.1
Triplet photosensitizers which are well known for efficiently producing triplet states are versatile compounds. So they have been widely used in photocatalysis, photodynamic therapy, and triplet-triplet annihilation upconversion. To generate a triplet state, one of the most critical photophysical processes is intersystem crossing(ISC). Typical approaches for the ISC are heavy atom effect, donor-acceptor structure, exciton coupling. Among these ways, although the heavy atom effect is the most prominent, due to its dark toxicity, there has been a concern for biological application. In this study, heavy atom-free photosensitizers were synthesized by introducing a stable free radical which can control spin multiplicity. The findings showed enhanced ISC efficiency comparing with a heavy atom substituted photosensitizer. Furthermore, for the modification of optical properties, linkers were introduced.
식도증상을 호소하는 환자에서 식도내압검사 소견 - 175 명의 환자에서 -
정양호(Yang Ho Jung),손봉국(Bong Gook Son),임종채(Zhong Chai Lim),나용호(Yong Ho Nah) 대한내과학회 1989 대한내과학회지 Vol.36 No.1
N/A To evaluate the relationship between symptoms and esophageal motility disorders, esophageal motility tracings were performed in patients with symptoms of chest pain, dysphagia, lump sense and dyspepsia. Fifty-two (56 of 93 patients with chest pain had abnormal motilities, as did 39 (67%) of 58 patients in the dysphagia group, and 16 (30%) of 53 patients in the lump sense and dyspepsia group. Nutcracker esophagus, nonspecific esophageal motility disorders and hypertensive lower esophageal sphincter were the more frequent esophageal motility disorders than the classic motility disorders such as achalasia and diffuse esophageal spasm. Nutcracker esophagus is the most common single motility disorder in Korea. The esophageal manometric test is a useful technique to evaluate esophageal symptoms of unknown origin.
고혈압성 심장에서 4 심음과 좌심실 근질량 및 승모판 혈류양상의 관계
정양호(Yang Ho Jung),김경중(Kyeong Joong Kim),허종(Jong Heo),노인환(In Whan Ro),박양규(Yang Kyu Park),정진원(Jin Won Jeong),박옥규(Ock Kyu Park) 대한내과학회 1989 대한내과학회지 Vol.37 No.6
N/A To determine the clinical significance of the fourth heart sound (S.) in hypertensive heart, 31 patients with essential hypertension aged between 32 to 77 years old and 15 normal controls were examined by physical examination, phonocardiography and echocardiography, All hypertensive patients had normal sinus rhythm and no history of coronary artery disease nor COPD and most of them had moderate to severe hypertension. Depending upon the presence of audible S4, hypertensive patients were divided into 3 groups; those without audible S, (group I, 15 cases), those with audible S, (group II, 12 cases) and those with questionably audible S, (group III, 4 cases). M-mode echocardiograms of the left ventricle and pulsed wave Doppler echocardiograms of the mitral valve were performed to determine the left ventricular thickness/dimension ratio (T/D), left ventricular mass index (LVMI) and A/E ratio of mitral flow pattern. T/D and LVMI were significantly increased in both hypertensive group I and group 11 (p<0.01) and T/D of hypertensive group II was more increased than that of hypertensive group I (p<0,05), but there was no significant difference between hypertensive group I and group II in LVMI. In contrast, the A/E ratio of mitral Doppler flow pattern was increased only in hypertensive group II compared to normal controls (p<0.01), and there was a significant difference between hypertensive group I and group II (p<0.01). Audible S, was found in hypertensive patients with an A/E ratio greater than 1.10 and in a normal person with an A/E ratio of 1.27, and all 10 hypertensive patients above an A/E ratio of 1.20 except one had an audible fourth heart sound. In conclusion, audible fourth heart sound is a useful bedside parameter for detecting left ventricular diastolic dysfunction in the hypertensive heart.