oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2020 ( 1 )

2019 ( 209 )

2018 ( 288 )

2017 ( 314 )

Custom range...

Search Results: 1 - 10 of 138775 matches for " Kadoya K "
All listed articles are free for downloading (OA Articles)
Page 1 /138775
Display every page Item
Four cases of endophthalmitis after 25-gauge pars plana vitrectomy
Mutoh T, Kadoya K, Chikuda M
Clinical Ophthalmology , 2012, DOI: http://dx.doi.org/10.2147/OPTH.S35123
Abstract: ur cases of endophthalmitis after 25-gauge pars plana vitrectomy Case report (1046) Total Article Views Authors: Mutoh T, Kadoya K, Chikuda M Published Date August 2012 Volume 2012:6 Pages 1393 - 1397 DOI: http://dx.doi.org/10.2147/OPTH.S35123 Received: 18 June 2012 Accepted: 19 July 2012 Published: 28 August 2012 Tetsuya Mutoh, Koji Kadoya, Makoto Chikuda Department of Ophthalmology, Dokkyo Medical University Koshigaya Hospital, Koshigaya, Saitama, Japan Abstract: We report our recent experience with four cases of endophthalmitis (one male, three females) after 25-gauge pars plana vitrectomy (PPV). One was a case of persistent cystoid macular edema caused by branch retinal vein occlusion, whereas the remaining three were cases of epiretinal membrane. Preoperative antibiotics before the first PPV procedure were not administered in three of the four cases. Endophthalmitis occurred 2–4 days after the first procedure in all cases, for which ceftazidime 2.0 mg/0.1 mL and vancomycin 1.0 mg/0.1 mL were injected into the vitreous cavity. This was followed by emergent 20-gauge PPV and intraocular lens removal using an infusion fluid containing ceftazidime and vancomycin. After the second PPV procedure, progress was good in three cases while retinal detachment occurred in the remaining case one month after surgery; this case required a third PPV procedure. Final best-corrected visual acuity ranged from 20/100 to 20/25 for the four cases. Bacterial cultures were negative after the second PPV procedure in all cases. In conclusion, postoperative endophthalmitis occurred in four of 502 cases (0.80%) that underwent 25-gauge PPV at our hospital. It is important to minimize the incidence of endophthalmitis after 25-gauge PPV.
Four cases of endophthalmitis after 25-gauge pars plana vitrectomy
Mutoh T,Kadoya K,Chikuda M
Clinical Ophthalmology , 2012,
Abstract: Tetsuya Mutoh, Koji Kadoya, Makoto ChikudaDepartment of Ophthalmology, Dokkyo Medical University Koshigaya Hospital, Koshigaya, Saitama, JapanAbstract: We report our recent experience with four cases of endophthalmitis (one male, three females) after 25-gauge pars plana vitrectomy (PPV). One was a case of persistent cystoid macular edema caused by branch retinal vein occlusion, whereas the remaining three were cases of epiretinal membrane. Preoperative antibiotics before the first PPV procedure were not administered in three of the four cases. Endophthalmitis occurred 2–4 days after the first procedure in all cases, for which ceftazidime 2.0 mg/0.1 mL and vancomycin 1.0 mg/0.1 mL were injected into the vitreous cavity. This was followed by emergent 20-gauge PPV and intraocular lens removal using an infusion fluid containing ceftazidime and vancomycin. After the second PPV procedure, progress was good in three cases while retinal detachment occurred in the remaining case one month after surgery; this case required a third PPV procedure. Final best-corrected visual acuity ranged from 20/100 to 20/25 for the four cases. Bacterial cultures were negative after the second PPV procedure in all cases. In conclusion, postoperative endophthalmitis occurred in four of 502 cases (0.80%) that underwent 25-gauge PPV at our hospital. It is important to minimize the incidence of endophthalmitis after 25-gauge PPV.Keywords: 25-gauge pars plana vitrectomy, endophthalmitis, incidence
Cell Size and the Initiation of DNA Replication in Bacteria
Norbert S. Hill,Ryosuke Kadoya,Dhruba K. Chattoraj,Petra Anne Levin
PLOS Genetics , 2012, DOI: 10.1371/journal.pgen.1002549
Abstract: In eukaryotes, DNA replication is coupled to the cell cycle through the actions of cyclin-dependent kinases and associated factors. In bacteria, the prevailing view, based primarily from work in Escherichia coli, is that growth-dependent accumulation of the highly conserved initiator, DnaA, triggers initiation. However, the timing of initiation is unchanged in Bacillus subtilis mutants that are ~30% smaller than wild-type cells, indicating that achievement of a particular cell size is not obligatory for initiation. Prompted by this finding, we re-examined the link between cell size and initiation in both E. coli and B. subtilis. Although changes in DNA replication have been shown to alter both E. coli and B. subtilis cell size, the converse (the effect of cell size on DNA replication) has not been explored. Here, we report that the mechanisms responsible for coordinating DNA replication with cell size vary between these two model organisms. In contrast to B. subtilis, small E. coli mutants delayed replication initiation until they achieved the size at which wild-type cells initiate. Modest increases in DnaA alleviated the delay, supporting the view that growth-dependent accumulation of DnaA is the trigger for replication initiation in E. coli. Significantly, although small E. coli and B. subtilis cells both maintained wild-type concentration of DnaA, only the E. coli mutants failed to initiate on time. Thus, rather than the concentration, the total amount of DnaA appears to be more important for initiation timing in E. coli. The difference in behavior of the two bacteria appears to lie in the mechanisms that control the activity of DnaA.
Real-time terahertz near-field microscope
F. Blanchard,A. Doi,T. Tanaka,H. Hirori,H. Tanaka,Y. Kadoya,K. Tanaka
Physics , 2011, DOI: 10.1364/OE.19.008277
Abstract: Terahertz (THz) waves have been significantly developed in the last fifteen years because of their great potential for applications in industrial and scientific communities1,2. The unique properties of THz waves as transparency for numerous materials and strong absorption for water-based materials are expected to broadly impact biosensing3 such as medical imaging4, chemical identifications5, and DNA recognition6. In particular, for accessing information within a scale comparable to the cell size where interactions between cell membrane and other organelle structures occur, micron size spatial resolution is required. Due to the large wavelength, however, the joint capability of THz near-field imaging with real-time acquisition, which is a highly desirable ability for observing real-time changes of in vivo sample, remains undone. Here, we report a real-time THz near-field microscope with a high dynamic range that can capture images of a 370 x 740 {\mu}m2 area at 35 frames per second. We achieve high spatial resolution on a large area by combining two novel techniques: THz pulse generation by tilted-pulse-front excitation7 and electro-optic (EO) balanced imaging detection using a thin crystal. To demonstrate the microscope capability, we reveal the field enhancement at the gap position of a dipole antenna after the irradiation of a THz pulse. Our results are the first demonstration of a direct quantification of a 2-dimensional subwavelength THz electric field taken in real-time.
IsoWeb: A Bayesian Isotope Mixing Model for Diet Analysis of the Whole Food Web
Taku Kadoya, Yutaka Osada, Gaku Takimoto
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0041057
Abstract: Quantitative description of food webs provides fundamental information for the understanding of population, community, and ecosystem dynamics. Recently, stable isotope mixing models have been widely used to quantify dietary proportions of different food resources to a focal consumer. Here we propose a novel mixing model (IsoWeb) that estimates diet proportions of all consumers in a food web based on stable isotope information. IsoWeb requires a topological description of a food web, and stable isotope signatures of all consumers and resources in the web. A merit of IsoWeb is that it takes into account variation in trophic enrichment factors among different consumer-resource links. Sensitivity analysis using realistic hypothetical food webs suggests that IsoWeb is applicable to a wide variety of food webs differing in the number of species, connectance, sample size, and data variability. Sensitivity analysis based on real topological webs showed that IsoWeb can allow for a certain level of topological uncertainty in target food webs, including erroneously assuming false links, omission of existent links and species, and trophic aggregation into trophospecies. Moreover, using an illustrative application to a real food web, we demonstrated that IsoWeb can compare the plausibility of different candidate topologies for a focal web. These results suggest that IsoWeb provides a powerful tool to analyze food-web structure from stable isotope data. We provide R and BUGS codes to aid efficient applications of IsoWeb.
Multipole surface plasmons in metallic nanohole arrays
Munehiro Nishida,Noriyuki Hatakenaka,Yutaka Kadoya
Physics , 2015, DOI: 10.1103/PhysRevB.91.235406
Abstract: The quasi-bound electromagnetic modes for the arrays of nanoholes perforated in thin gold film are analyzed both numerically by the rigorous coupled wave analysis (RCWA) method and semi-analytically by the coupled mode method. It is shown that when the size of the nanohole occupies large portion of the unit cell, the surface plasmon polaritons (SPPs) at both sides of the film are combined by the higher order waveguide modes of the holes to produce multipole surface plasmons: coupled surface plasmon modes with multipole texture on the electric field distributions. Further, it is revealed that the multipole texture either enhances or suppresses the couplings between SPPs depending on their diffraction orders and also causes band inversion and reconstruction in the coupled SPP band structure. Due to the multipole nature of the quasi-bound modes, multiple dark modes coexist to produce variety of Fano resonance structures on the transmission and reflection spectra.
Directional emission of light from a nano-optical Yagi-Uda antenna
Terukazu Kosako,Holger F. Hofmann,Yutaka Kadoya
Physics , 2009, DOI: 10.1038/nphoton.2010.34
Abstract: The plasmon resonance of metal nanoparticles can enhance and direct light from optical emitters in much the same way that radio frequency (RF) antennas enhance and direct the emission from electrical circuits. In the RF regime, a typical antenna design for high directivity is the Yagi-Uda antenna, which basically consists of a one-dimensional array of antenna elements driven by a single feed element. Here, we present the experimental demonstration of directional light emission from a nano-optical Yagi-Uda antenna composed of an array of appropriately tuned gold nanorods. Our results indicate that nano-optical antenna arrays are a simple but efficient tool for the spatial control of light emission.
Design parameters for a nano-optical Yagi-Uda antenna
Holger F. Hofmann,Terukazu Kosako,Yutaka Kadoya
Physics , 2007, DOI: 10.1088/1367-2630/9/7/217
Abstract: We investigate the possibility of directing optical emissions using a Yagi-Uda antenna composed of a finite linear array of nanoparticles. The relevant parameters characterizing the plasma resonances of the nanoparticles are identified and the interaction between the array elements is formulated accordingly. It is shown that the directionality of the optical emission can be observed even in the presence of non-negligible absorption losses in the nanoparticles. We conclude that a finite array of gold nanorods may be sufficient for the realization of a working nano-optical Yagi-Uda antenna.
The Requirements for Laparoscopy-Assisted Distal Gastrectomy to Become Standard Procedure for Gastric Cancer: Based on Qualitative Study of Surgeons’ Experiences  [PDF]
Nozomu Murakami, Kouichi Tanabe, Shinichi Kadoya, Masanari Shimada, Katsuo Shimada, Masahide Kaji, Mitsuaki Sakatoku, Koichiro Sawada, Hatsuna Yasuda, Tatsuhiko Kashii
Surgical Science (SS) , 2014, DOI: 10.4236/ss.2014.54031
Abstract: Laparoscopy-assisted distal gastrectomy (LADG) has become one of the standard surgical procedures for gastric cancer in Japan and Korea. However, LADG is currently listed as being in the clinical research phase under the Gastric Cancer Treatment Guidelines. The aim of this study is to report surgeons’ opinions of what is needed if LADG is to become a standard procedure. We conducted questionnaire survey with open questions in hospitals that either applied or did not apply LADG and compared the answers. We labeled and categorized the collected data using content analysis. The number of hospitals which applied LADG more than doubled from 5 to 12 hospitals over 3 years. Overall, hospitals reported that the necessary elements for LADG to become a standard procedure are: clinical trials of LADG (n = 5, 22.7%), surgeons’ practical experience in performing LADG (n = 4, 18.2%), stability of radical treatment (n = 4, 18.2%), and a shorter operative duration (n = 3, 13.6%) for the procedure. Surgeons’ practical experience was chosen as the most important requirement in the hospitals which applied LADG while clinical trials (n = 2, 40.0%) and stability of radical treatment (n = 2, 40.0%) were the most common answers in the hospitals which did not apply LADG. Hospitals and surgeons’ practical experience, stabilizing radical cure, and the large scale of clinical trials are for LADG to become a standard procedure and to gain equivalent importance as open distal gastrectomy in treating gastric cancer.
Evaluation of the mycelial network formed by arbuscular mycorrhizal hyphae in the rhizosphere of papaya and other plants under intercropping system
Cruz, André Freire;Ishii, Takaaki;Matsumoto, Isao;Kadoya, Kazuomi;
Brazilian Journal of Microbiology , 2003, DOI: 10.1590/S1517-83822003000100015
Abstract: an experiment was carried out under greenhouse conditions to observe the distribution of arbuscular mycorrhizal (am) hyphae in the rhizosphere of papaya and other plants under intercropping system. special acrylic root boxes with three compartments, separated by nylon mesh screens, were constructed. one outer compartment contained seedlings of papaya (carica papaya l.) and other contained seedlings of bahiagrass (paspalum notatum flügge) or millet (pennisetum glaucum l. r. br.). the central compartment was inoculated with an am fungus (gigaspora margarita). in another experiment, the outer compartments were treated with 25% meoh eluates of bahiagrass (bre) and millet (mre) root extracts. a control box, containning only papaya seedlings was also prepared. hyphal density, root infection levels and spore numbers were higher in the bahiagrass and millet compartments than in the papaya compartment. similar results were found for the percentage of am infection and the number of am spores. in the compartments treated with bre and mre the density of am hyphae was around 20%, and a few spores were found in those compartments. few am hyphae and spores were observed in the control compartment.
Page 1 /138775
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.