1,391 research outputs found
DFT study of anatase-derived TiO2 nanosheets/graphene hybrid materials
No full textIn this work, we focus on the impact that the interface structure formed by graphene and a bilayer of anatase (001)-oriented exerts on electronic and optical properties of the final nanocomposite. In order to perform such analysis, we have modeled, optimized, and investigated the electronic properties of several graphene–TiO2 hybrids by means of density functional theory based calculations. Our results suggest that the physisorbed system is less electronically coupled and does not enhance the photoresponsivity in the visible region. On the other hand, the chemical bond between graphene and TiO2 nanosheet, a Ti[BOND]O[BOND]C bridge, clearly makes the two components highly electronically coupled and the graphene oxide (GO)/TiO2 chemisorbed system is characterized by a higher photoresponsivity in the visible region. This result is ascribed to the raise of a new valence band maximum state that lies in the pristine bandgap of TiO2 nanosheet, consequence of the hybridization between GO and TiO2
Spatial resolution compensation by adjusting the reconstruction kernels for iterative reconstruction images of computed tomography
Get PDF博士論文 要旨Abstract/本文Full 以下に掲載：Physica Medica 74 pp.47-55 2020. Elsevier. 共著者：SUGISAWA Koichi, ICHIKAWA Katsuhiro, URIKURA Atsushi, MINAMISHIMA Kazuya, MASUDA Syota, HOSHINO Takashi, NAKAHARA Akiko, YAMADA Yoshitake, JINZAKI Masahir
Principal component analysis of odor coding at the level of third-order olfactory neurons in Drosophila
No full textOlfactory information in Drosophila is conveyed by projection neurons from olfactory sensory neurons to Kenyon cells (KCs) in the mushroom body (MB). A subset of KCs responds to a given odor molecule, and the combination of these KCs represents a part of the neuronal olfactory code. KCs are also thought to function as coincidence detectors for memory formation, associating odor information with a coincident punishment or reward stimulus. Associative conditioning has been shown to modify KC output. This plasticity occurs in the vertical lobes of MBs containing /' branches of KCs, which is shown by measuring the average Ca2+ levels in the branch of each lobe. We devised a method to quantitatively describe the population activity patterns recorded from axons of >1000 KCs at the /' branches using two-photon Ca2+ imaging. Principal component analysis of the population activity patterns clearly differentiated the responses to distinct odors.Ministry of Education, Culture, Sports, Science, and Technology of Japa
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Functional and Morphological Changes in a Rat Model of Knee Osteoarthritis
Get PDFIn the United States, the estimated lifetime risk of developing knee osteoarthritis is approximately 44%. Therefore, animal models are necessary to study the etiology of the disease as well as the efficacy of therapeutic treatments. In this study, a combination of anterior cruciate ligament transection (ACLT) and partial medial meniscal transection (pMMT) was performed on rat knees to investigate changes in behavior, cartilage, and bone morphology due to post-traumatic osteoarthritis (PTOA). Hyaluronic acid (HA) intra- articular injection was administered to the knee one week after the surgeries. ACLT + pMMT surgery resulted in a temporary contralateral preference in static weight bearing, minor degeneration of the articular cartilage, and generally decreased bone quality. However, among the parameters analyzed, the most sensitive parameter for characterizing PTOA changes in the ACLT + pMMT model was trabecular thickness from μCT analyses. Treatment with HA was also found to attenuate the progression of PTOA changes in articular cartilage and bone morphology
Studies on the cold injury of citrus trees. Ⅳ. Cytological observation of the freezing on Satsuma orange trees.
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Ultra-high field NMR studies of antibody binding and site-specific phosphorylation of α-synuclein
No full textSclerosing lipogranuloma of the scrotum: a case report
Get PDFWe present a case of sclerosing lipogranuloma of the scrotum. A 42-year-old man who had complained of a painless intrascrotal mass of one week's duration visited our clinic. Physical examination revealed a symmetrical Y-shaped hard mass around the penile base in the scrotum. Laboratory examination showed no abnormal findings except for a 14.0% eosinophilia. Magnetic resonance imaging (MRI) with a surface coil showed an atypical mass at the penile base. Percutaneous needle biopsy under ultrasound guidance was performed and histopathological findings revealed lipogranuloma accompanied by infiltrating multinuclear giant cells, eosinocytes and lymphocytes. The tumor gradually disappeared during a 4-week administration of antibiotics and antiphlogistics. We have also reviewed 95 cases of sclerosing lipogranuloma of the scrotum in the Japanese literature
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