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Manabe, Satoshi,Nagata, Eisuke,Nakano, Hideyuki Korean Society of Photoscience 2014 Rapid communication in photoscience Vol.3 No.2
The title compound (BMBZA) was designed and synthesized as a novel fluorescent amorphous molecular material. BMBZA was found to exhibit solvatofluorochromism and to readily form an amorphous glass by cooling the melt on standing. In addition, the morphological change from crystalline state to amorphous one could be induced by mechanical grinding. Although fluorescence was scarcely observed for the crystalline sample of BMBZA, the grinding the sample was found to enhance the fluorescence emission, that is, BMBZA exhibited on-off type mechanofluorochromism.
Image-Based Relighting - Luminance Mapping Based on Lighting Functions
Manabe, Tomohisa,Raytchev, Bisser,Tamaki, Toru,Kaneda, Kazufumi Society for Computational Design and Engineering 2012 International Journal of CAD/CAM Vol.12 No.1
The paper proposes a method for generating a sequence of images with smooth transition of illumination from two input images with different lighting conditions. Our relighting approach is image-based, such as the light field rendering. We store the luminances (pixel RGB values) into "lighting functions" consisting of a couple of parameters related to normal vectors. Images with different light positions are rendered by interpolating the luminances retrieved from the lighting functions. The proposed method is a promising technique for many applications requiring a scene with variety of lighting effects, such as movies, TV games, and so on.
Cross Talk Experiment with Two-element CdTe Detector and Collimator for BNCT-SPECT
Manabe, Masanobu,Ohya, Ryosuke,Saraue, Nobuhide,Sato, Fuminobu,Murata, Isao The Korean Association for Radiation Protection 2016 방사선방어학회지 Vol.41 No.4
Background: Boron Neutron Capture Therapy (BNCT) is a new radiation therapy. In BNCT, there exists some very critical problems that should be solved. One of the severest problems is that the treatment effect cannot be known during BNCT in real time. We are now developing a SPECT (single photon emission computed tomography) system (BNCT-SPECT), with a cadmium telluride (CdTe) semiconductor detector. BNCT-SPECT can obtain the BNCT treatment effect by measuring 478 keV gamma-rays emitted from the excited state of $^7Li$ nucleus created by $^{10}B(n,{\alpha})$ $^7Li$ reaction. In the previous studies, we investigated the feasibility of the BNCT-SPECT system. As a result, the S/N ratio did not meet the criterion of S/N > 1 because deterioration of the S/N ratio occurred caused by the influence of Compton scattering especially due to capture gamma-rays of hydrogen. Materials and Methods: We thus produced an arrayed detector with two CdTe crystals to test cross talk phenomenon and to examine an anti-coincidence detection possibility. For more precise analysis for the anti-coincidence detection, we designed and made a collimator having a similar performance to the real BNCT-SPECT. Results and Discussion: We carried out experiments with the collimator to examine the effect of cross talk of scattering gamma-rays between CdTe elements more practically. As a result of measurement the coincidence events were successfully extracted. Conclusion: We are now planning to carry out evaluation of coincidence rate from the measurement and comparison of it with the numerical calculations.
A Target Protein for Potassium Isolespedezate, A Bioactive Metabolite Controlling Nyctinasty
Manabe, Yoshiyuki,Iwakura, Izumi,Mukai, Makoto,Ueda, Minoru Korean Society for Bioinformatics and Systems Biol 2009 Interdisciplinary Bio Central (IBC) Vol.1 No.4
Introduction: Leguminous plants open their leaves during the day and close them at night as if sleeping, a type of movement that follows circadian rhythms, and is known as nyctinastic movement. This phenomenon is controlled by two endogenous bioactive substances that exhibit opposing activities: Leaf-Opening Factor (LOF), which opens the leaves, and Leaf-Closing Factor (LCF), which closes them. Potassium isolespedezate (1) is LOF for Cassia obtusifolia and other species of the genus Cassia. We report on the detection and identification of the target proteins of 1 using the stepwise FLAG-tagging strategy. Materials and Methods: First, we labeled the target protein with azide group by incubating the iodoacetamide-type probe (2), which is the target cell of 1, and then, succeeded in introduction of FLAG using click chemistry. Results and Discussion: By using this method, the 83 kDa cytoplasmic protein (CTPL; cytosolic target protein of lespedezate 1) was detected and purified as a target protein of 1. This protein was identified as MetE (5-methyltetrahydropteroyltriglutamate ?homocysteinemethyltransferase). Conclusion and Prospects: We developed stepwise FLAG-tagging strategy for purification of target protein of bioactive substances. Our results suggested that our strategies have a possibility to detect the target protein of a bioactive natural product in a highly complex living system.
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.
Nodoka Manabe,Augusto Covaro,Lukas Bobinski,Takachika Shimizu,Claes Olerud,Yohan Robinson 대한척추외과학회 2019 Asian Spine Journal Vol.13 No.1
Study Design: Retrospective analysis of prospectively collected data. Purpose: To describe the radiological characteristics of the occipitocervical area in patients with ankylosing spondylitis (AS) using the novel measure X-angle and to describe the correlation between the ankylosed occipitoatlantoaxial (OAA) joint and thoracic kyphosis (TK). Overview of Literature: AS affects the axial skeleton, leading to progressive ankylosis of all vertebral segments. The effect of ankylosis on the upper cervical area of these patients is not well documented. Methods: All patients with complete ankylosis of the spinal column between C3 and T1, treated for cervical spinal fracture between 2007 and 2014, were eligible for inclusion in this study. The level of cervical fracture was identified. The T1–12 and T5–12 angles were measured using preoperative lateral radiography. The progressive degeneration of the C0-C1-C2 joints was evaluated via the new indicator X-angle, through the measurement of the angle of the C0-C1-C2 articulations in the coronal plane using computed tomography. Results: We included 86 consecutive patients with AS (67 males) aged 69±12 years. The patients were divided into two groups according to the degenerative change in the C0–C1 joint (62 patients with a mobile joint and 24 patients with an ankylosed joint). There was no significant difference between the two groups in terms of age (p =0.094) and level of fracture (p =0.949). The most commonly affected level was C6. There was no requirement for revision due to non-union in any of the patients. There was a statistically significant difference observed in the T1–12, T5–12, and X-angles (p =0.004, 0.001, and <0.001, respectively). TK was greater in the ankylosed joint group than in the mobile joint group. The X-angle was also greater in the ankylosed joint group because of the vertical destruction of the OAA joint. Conclusions: Thoracic hyperkyphosis resulted in degenerative changes in the C0-C1-C2 joint in patients with AS. The X-angle is a reliable method for measuring the integrity of the C0-C1-C2 joint in such patients.
Improvement of Youla Parameterization by Coefficient Diagram Method
Shunji Manabe 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
The parameterization of all stabilizing control laws, through Youla parameterization, is a widely accepted concept in control design. However, when it is applied to the specific design, it is not effective because of the lack of rules of parameter selection. Generally speaking there are two sources which make the system unrobust, one comes from improper selection of the denominator of sensitivity and complementary sensitivity functions (characteristic polynomial) and other comes from that of the numerator. The Coefficient Diagram Method can give most robust characteristic polynomial for given performance and design limitations. Free parameters can be assigned to the desired numerator terms of the sensitivity and complementary sensitivity functions. In this way, Youla parameterization becomes the effective design tool.