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나 영왕,백 형진,최 유미,이 석영,이 정로,정 종욱,박 용진,김 석현 한국작물학회 2014 한국작물학회지 Vol.59 No.3
The purpose of this study was to develop the cost-effective and efficiency seed longevity prediction method of rice (Oryza sativa L.) germplasm for viability monitoring. To find an optimum predicting method for rice seed longevity at genebank, an accelerated ageing (AA) test, a controlled deterioration (CD) test and a dry-heat treatment (DHT) were conducted to the four groups of rice germplasm based on ecotype, such as Indica, Japonica, Javanica and Tongil type. Among the three artificial aging treatments, the dry-heat treatment of 36 hours at 90°C is suggested as a routine predictive test method of rice germplasm longevity at a genebank. The distribution of germination rate on 3,066 accessions which conserved 26.5 years at 4°C showed similar trend with the result of distribution by dry-heat treatment at 90°C on 36 hours using 106 accessions of rice selected samples which composed four ecotype groups. The results show that the dry-heat treatment affect not only predicting the rice seed longevity but also determining effective interval for monitoring germination of rice germplasm in genebanks.
나 영왕,최 유미,백 형진,이 석영,강 정훈,김 석현 한국작물학회 2014 Korean journal of crop science Vol.59 No.3
The purpose of this study was to know the seed longevity of rice (Oryza sativa L.) germplasm for effective viability monitoring. The longevity was determined via germination tests of 3,066 accessions of rice germplasm from the National Agrobiodiversity Center, Rural Development Administration, Korea. The rice germplasm accessions have been conserved at a mid-term storage (4°Csealed metal can on either sides for 25~26.5 years. The final germination percentages of 3,066 rice germplasm accessions of 6.5±1.0% seed moisture content with 94% initial germination stored at 4°C for 26.5 years declined to 47% while at -18°C for 25 years maintained high germinability as 93%. Germination time courses, which represent the average performance of rice ecotypes stored at 4°C and 30% RH, were fitted regression equation, to calculate the time at which germination characteristically declined to 50% (P50). These P50 values of Indica, Japonica, Javanica and Tongil type in rice were 39.9, 22.9, 25.4 and 31.8 years, respectively. The rice germplasm stored at 4°C could be clustered in 4 groups using quartile of final germination after 26.5 years storage. The seed longevity (P50) of each group was estimated by regression equation of changed germination percentages according to storage periods. The P50 values of group Ⅰ, group Ⅱ, group Ⅲ and group Ⅳ were 21.1, 23.6, 30.0 and 75.7 years.
Two-Phase Behavior in Twinned La0.65Ca0.35MnO3 Films
정수 박,이영백,형경 이,혜련 배,V. Prokhorov 한국물리학회 2004 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.45 No.1
La0:65Ca0:35MnO3 (LCMO) lms were epitaxially grown on twinned LaAlO3 substrate by using rf magnetron sputtering. The magnetotransport properties of LCMO lm were investigated in order to elucidate the coexistence of ferromagnetic metallic (FMM) and charge-ordered insulating (COI) phases. The synergy between the martensitic nature of the charge-ordered phase and the local current is important to explain the giant resistance switching eect. The coexistence of the FMM and COI domains was further conrmed by X-ray diraction and high-resolution electron microscopy investigations.
맞춤전정재활운동의 효과, 순응도와 만족도: 단일 병원 경험
이 형,김현아 대한평형의학회 2019 Research in Vestibular Science Vol.18 No.1
Objectives: Over the last decades, numerous studies on the effect of vestibular rehabilitation (VR) have been reported in western countries, but there has been no report about real experiences of customized VR in Korea. The aim of this study was to analyze of the efficacy, compliance and satisfaction in patients with acute and chronic dizziness. Methods: Patients with dizziness were treated with a customized VR at least 4 weeks. Subjects were assessed before and after at least 4 weeks of customized VR for visual analogue scale (VAS) and disability scale (DS). Patients were asked to score the satisfaction of their treatment as 1 (very poor) to 5 (excellent). Compliance to exercise program were graded as 1 (regularly performed), 2 (frequently performed), or 3 (rarely performed). Results: Thirty-two patients with dizziness were included. Diagnosis of patients were vestibular migraine (n=5), Meniere’s disease (n=2), vestibular neuritis (n=10), persistent perceptual positional dizziness (n=10), bilateral vestibulopathy (n=3), and central dizziness (n=2). Mean VAS and DS before VR were 15.3 and 2.4, respectively. Mean VAS and DS after VR were 4.5 and 0.7, respectively. Significant improvements in VAS and DS were observed after VR (p=0.00). Mean treatment satisfaction score was 3.3±1.0 and mean compliance score was 2.3±0.8. Satisfaction to VR showed positive correlation with patient’s compliance. (p=0.00, r=0.644) Conclusions: Significant improvements were seen in symptom and disability in patients with acute and chronic dizziness after customized VR. Patients showed moderate compliance to exercise program and overall satisfaction was fair.
이 형,이동국,임정근,박영춘 啓明大學校 醫科大學 1992 계명의대학술지 Vol.11 No.4
Craniopharyngiomas are characterized by cyst formation and calcification, but spontaneous rupture of cyst is very rare. We report a case of spontaneous rupture of Craniopharyngioma cyst recognized by computed tomography and magnetic resonance imaging
Autonomic dysfunction in patients with orthostatic dizziness
이 형,Hyun Ah Kim 대한임상신경생리학회 2023 Annals of Clinical Neurophysiology Vol.25 No.1
Orthostatic dizziness is feeling dizzy or lightheaded when standing up. Hemodynamic orthostatic dizziness can be caused by autonomic dysfunction such as orthostatic hypotension or postural tachycardia syndrome. The interpretation of the autonomic function test results in patients with orthostatic dizziness is crucial for diagnosing and managing the underlying condition. The head-up tilt and Valsalva tests are especially important for evaluating adrenergic function in patients with hemodynamic orthostatic dizziness. However, it is important to note that autonomic function tests do not cover the entire diagnostic process, since their findings need to be considered along with the detailed history and physical examination results of the patient because various differential diagnoses exist for orthostatic dizziness. Ensuring appropriate treatment by interpreting the autonomic function test results can help to determine the improvement of and prevents falls from orthostatic dizziness.
이 형,김현아 대한평형의학회 2016 Research in Vestibular Science Vol.15 No.1
Periodic alternating nystagmus (PAN) is characterized by a periodical reversal in the direction of the nystagmus. Acquired PAN is caused by lesions of the inferior cerebellar vermis, causing disinhibition of the velocity storage mecha-nism, which is mediated by the vestibular nuclei. An eighty-year-old woman with abscess in midline cerebellum experienced dizziness and imbalance. We observed short period PAN with 7–8 seconds.Res Vestib Sci 2016;15(1):27-29