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RISS 인기검색어
- 검색키워드
- 저자 : Masahiko Tamaki (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
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Tamaki, Masahiko,Kobayashi, Fumiyuki,Ikeura, Hiromi,Sato, Michio The Korean Society of Plant Pathology 2018 Plant Pathology Journal Vol.34 No.4
To investigate the difference in the disinfectant efficiency of ozone microbubbles ($O_3MB$) and ozone millibubbles ($O_3MMB$), the morphological change of the treated Fusarium oxysporum f. sp. melonis spores was observed with scanning and transmission electron microscopies (SEM and TEM). The disinfectant efficiency of $O_3MB$ on F. oxysporum f. sp. melonis spores was greater than that of $O_3MMB$. On observation with SEM, it was revealed that morphological change of F. oxysporum f. sp. melonis spores was caused by $O_3MB$ and $O_3MMB$, and damage to the spore surfaces by $O_3MB$ occurred sooner than that by $O_3MMB$. On observation with TEM, it was furthermore confirmed that F. oxysporum f. sp. melonis spores treated with $O_3MB$ induced wavy deformation of cell membrane and the intracellular change different from that with $O_3MMB$. Therefore, the greater disinfection efficiency of $O_3MB$ was suggested to be caused due to the function of the MB in addition to the oxidative power of $O_3$.
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Masahiko Tamaki,Fumiyuki Kobayashi,Hiromi Ikeura,Michio Sato 한국식물병리학회 2018 Plant Pathology Journal Vol.34 No.4
To investigate the difference in the disinfectant efficiency of ozone microbubbles (O3MB) and ozone millibubbles (O3MMB), the morphological change of the treated Fusarium oxysporum f. sp. melonis spores was observed with scanning and transmission electron microscopies (SEM and TEM). The disinfectant efficiency of O3MB on F. oxysporum f. sp. melonis spores was greater than that of O3MMB. On observation with SEM, it was revealed that morphological change of F. oxysporum f. sp. melonis spores was caused by O3MB and O3MMB, and damage to the spore surfaces by O3MB occurred sooner than that by O3MMB. On observation with TEM, it was furthermore confirmed that F. oxysporum f. sp. melonis spores treated with O3MB induced wavy deformation of cell membrane and the intracellular change different from that with O3MMB. Therefore, the greater disinfection efficiency of O3MB was suggested to be caused due to the function of the MB in addition to the oxidative power of O3.
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Manabe Osamu,Oyama-Manabe Noriko,Naya Masanao,Obara Masahiko,Kikuchi Yasuka,Aikawa Tadao,Tomiyama Yuuki,Sugimori Hiroyuki,Katoh Chietsugu,Tamaki Nagara,Anzai Toshihisa 아시아심장혈관영상의학회 2019 Cardiovascular Imaging Asia Vol.3 No.1
Objective: Although the relationship between coronary stenosis and myocardial perfusion is well established, little is known regarding the contribution of subendocardial infarction to this relationship. The purpose of this study was to evaluate the effects of obstructive coronary stenosis and subendocardial infarction on myocardial flow reserve (MFR). Materials and Methods: Fifty-four patients with suspected and known coronary artery disease (CAD) who underwent perfusion 3T-MRI and invasive angiography were studied. The time-intensity curves of the left ventricle tissue and cavity were fitted by a single-compartment model to compute myocardial blood flow (MBF). Global MFR and regional MFR were calculated by dividing stress MBF by rest MBF. Myocardial infarction lesions were assessed by late gadolinium enhancement. The effects of obstructive coronary stenosis and subendocardial infarction on the regional MFR were evaluated. Results: Obstructed vessels (≥70% diameter stenosis for main vessels or ≥50% for left main) were observed in 65 out of 162 vessels. Further analysis demonstrated that MFR in obstructed vessels was significantly lower than that in non-obstructed vessels {1.48 [the interquartile range (IQR) : 1.31–2.03] vs. 1.84 (IQR: 1.44–2.46), p=0.01}. After excluding vessels with transmural infarction (n=19), the MFR for vessels with subendocardial infarction (n=20) was significantly lower than the MFR for non-infarction vessels (n=123) [1.48 (IQR: 1.40–1.79) vs. 1.88 (IQR: 1.41–2.48), p=0.02]. Conclusion: Subendocardial infarction in addition to obstructive coronary atherosclerosis might be associated with an impairment of regional MFR in patients with CAD.
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