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Search Results: 1 - 10 of 1434 matches for " Hitoshi Muramatsu "
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Methionine and Threonine Requirements of Dutch Rabbits Fed under a Cecotrophy Prevention Program  [PDF]
Yumi Abe, Hitoshi Muramatsu, Seizi Sukemori
Open Journal of Animal Sciences (OJAS) , 2019, DOI: 10.4236/ojas.2019.92014
Abstract: It is suggested that the difference in body size between domestic-type rabbits and small pet-type rabbits results in different nutrient requirements. The nutritional requirements of pet rabbits have been assessed, although such assessments require evaluation throughout the rabbit life span. The present study was conducted under a cecotrophy prevention program with young and adult rabbits. Six male Dutch rabbits were housed individually in a dormitory-type cage, and they were randomly fed graded levels of dietary methionine and threonine, at ratios of 4:0, 3:1, 2:2, 1:3, and 0:4 mixed with two types of feed, 4:0 and 0:4. Four days after switching diets and 4 hrs after starting morning feeding, approximately one milliliter of blood was collected from the vein of the ear. Free amino acid concentrations in the plasma were determined with a high-speed amino acid analyzer. Plasma concentrations of methionine and threonine compared to dietary methionine and threonine levels are shown in young rabbits. The plasma concentration of methionine remained constant at a low level and then increased linearly. The intersection was estimated as 0.16 g/d. In the same manner, the intersection of the plasma threonine value was estimated as 0.27 g/d. These values were calculated as 0.27% and 0.47% of the diets, respectively. In the case of adult rabbits, the baseline was not obtained for dietary methionine and threonine levels. The methionine requirement was estimated as 0.11 g/d. The threonine requirement was estimated as 0.22 g/d. These values were calculated as 0.15% and 0.30% of the diets, respectively. In comparison with young and adult rabbits, both methionine and threonine showed a low baseline level in young rabbits, while their variations in plasma levels of adult rabbits were not determined. The requirement of both amino acids in young rabbits is higher than that in adult rabbits. The dietary values of both amino acids in young rabbits were also higher than those in adult rabbits. Small pet-type adult rabbits required lower amino acid levels
Multiple Marker Effects of Single Nucleotide Polymorphisms in Two Genes, NCAPG and PLAG1, for Carcass Weight in Japanese Black Cattle  [PDF]
Youji Muramatsu
Open Journal of Animal Sciences (OJAS) , 2019, DOI: 10.4236/ojas.2019.91011
Carcass weight is an economically important trait for beef cattle breeding and markets. The previous studies detected two single nucleotide polymorphisms (SNPs) associated with carcass weight of Japanese Black: c.1326T>G in NCAPG gene and FJX_250879 in PLAG1 gene. Here, I carried out multiple marker association analysis for the two SNPs in Japanese Black population of 218 animals. The multiple marker analysis with the model including the main effects of the two SNPs and their interaction detected significant main effects of c.1326T>G and FJX_250879 and a significant interaction between the two SNPs, for carcass weight. These findings suggest the presence of inter-allelic interactions among genes affecting the variation of carcass weight. For effective marker-assisted selection for beef production, interaction between the two markers needs to be considered.
The Use of Cavitation Peening to Increase the Fatigue Strength of Duralumin Plates Containing Fastener Holes  [PDF]
Hitoshi Soyama
Materials Sciences and Applications (MSA) , 2014, DOI: 10.4236/msa.2014.56047

An effective method for improving the fatigue life of Duralumin plates with fastener holes, such as those used in the construction of aircraft, is to introduce a compressive residual stress around the fastener holes. Cavitation peening is a novel peening method that uses the cavitation impact produced when a high-speed water jet is injected into a water-filled chamber. In this paper, Duralumin plate specimens with holes were treated by cavitation peening under various conditions, and the fatigue strength of the specimens was determined using a plate bending fatigue test. It was revealed that a compressive residual stress was introduced not only on surfaces perpendicular to the axis of the cavitating jet but also on the walls of holes which were parallel to this. It was found that a 51% improvement in fatigue strength could be achieved by cavitation peening. Note that this is first report demonstrating an improvement in the fatigue life of Duralumin plates with fastener holes by cavitation peening.

Is Independent Choice Possible?  [PDF]
Hitoshi Inamori
Journal of Quantum Information Science (JQIS) , 2016, DOI: 10.4236/jqis.2016.61005
Abstract: This paper questions the generally accepted assumption that one can make a random choice that is independent of the rest of the universe. We give a general description of any setup that could be conceived to generate random numbers. Based on the fact that the initial state of such setup together with its environment cannot be known, we show that the independence of its generated output cannot be guaranteed. Some consequences of this theoretical limitation are discussed.
No Quantum Process Can Explain the Existence of the Preferred Basis: Decoherence Is Not Universal  [PDF]
Hitoshi Inamori
Journal of Quantum Information Science (JQIS) , 2016, DOI: 10.4236/jqis.2016.63014
Abstract: Environment induced decoherence, and other quantum processes, have been proposed in the literature to explain the apparent spontaneous selection—out of the many mathematically eligible bases—of a privileged measurement basis that corresponds to what we actually observe. This paper describes such processes, and demonstrates that—contrary to common belief—no such process can actually lead to a preferred basis in general. The key observation is that environment induced decoherence implicitly assumes a prior independence of the observed system, the observer and the environment. However, such independence cannot be guaranteed, and we show that environment induced decoherence does not succeed in establishing a preferred measurement basis in general. We conclude that the existence of the preferred basis must be postulated in quantum mechanics, and that changing the basis for a measurement is, and must be, described as an actual physical process.
A novel mechanism for the regulation of IFN-γ inducible protein-10 expression in rheumatoid arthritis
Ryosuke Hanaoka, Tsuyoshi Kasama, Mizuho Muramatsu, Nobuyuki Yajima, Fumitaka Shiozawa, Yusuke Miwa, Masao Negishi, Hirotsugu Ide, Hideyo Miyaoka, Hitoshi Uchida, Mitsuru Adachi
Arthritis Research & Therapy , 2003, DOI: 10.1186/ar616
Abstract: The pathology of rheumatoid arthritis (RA) is characterized by the infiltration of several inflammatory cells into both the pannus and the joint fluid, and by subsequent tissue destruction. Chemokines, as well as other inflammatory mediators, appear to play key roles in the pathogenesis of RA, and the co-ordinated production of chemokines and proinflammatory cytokines is probably important in the orchestration of the inflammatory responses observed in patients with RA [1-4].Chemokines belong to a gene superfamily of chemotactic cytokines that share substantial homology with four conserved cysteine amino acid residues [5-7]. The CXC family of chemokines (e.g. interleukin-8, growth-related oncogene, and epithelial cell-derived neutrophil attractant-78), in which the first two cysteines are separated by another amino acid residue, is chemotactic for neutrophils and T cells. The CC chemokine family (e.g. macrophage inflammatory protein-1, macrophage chemoattractant protein-1, and RANTES [regulated upon activation, normal T-cell expressed and secreted]), in which the first two cysteine residues are juxtaposed, is chemotactic for monocytes and subpopulations of T cells. IFN-γ inducible protein-10 (IP-10), a member of the CXC chemokine family, is expressed and secreted by monocytes, fibroblasts, and endothelial cells after stimulation with IFN-γ [5,8], and has important roles in the migration of T cells into inflamed sites. It also furthers the regression of angiogenesis, in contrast with interleukin-8 [9-12].A Th1/Th2 cytokine imbalance with a predominance of Th1 cytokines, including IFN-γ, is suggested to be of pathogenetic importance in RA [13-15]. The Th1 phenotype expresses certain chemokine receptors, including CXCR3 and CCR5 [16,17]. IP-10, a CXCR3 ligand, may be expressed in the inflamed synovium of RA, and appears to play an important role in the recruitment of Th1-type cells into the joint. Thus, the aim of the present study was to examine the regulatory mechanis
Survival of geriatric patients after percutaneous endoscopic gastrostomy in Japan
Yutaka Suzuki, Seryna Tamez, Akihiko Murakami, Akihiko Taira, Akihiro Mizuhara, Akira Horiuchi, Chie Mihara, Eiji Ako, Hirohito Muramatsu, Hitoshi Okano, Hitoshi Suenaga, Kazuaki Jomoto, Junya Kobayashi, Katsunari Takifuji, Kazuhiro Akiyama, Koh Tahara
World Journal of Gastroenterology , 2010,
Abstract: AIM: To examine the long term survival of geriatric patients treated with percutaneous endoscopic gastrostomy (PEG) in Japan.METHODS: We retrospectively included 46 Japanese community and tertiary hospitals to investigate 931 consecutive geriatric patients (≥ 65 years old) with swallowing difficulty and newly performed PEG between Jan 1st 2005 and Dec 31st 2008. We set death as an outcome and explored the associations among patient’s characteristics at PEG using log-rank tests and Cox proportional hazard models.RESULTS: Nine hundred and thirty one patients were followed up for a median of 468 d. A total of 502 deaths were observed (mortality 53%). However, 99%, 95%, 88%, 75% and 66% of 931 patients survived more than 7, 30, 60 d, a half year and one year, respectively. In addition, 50% and 25% of the patients survived 753 and 1647 d, respectively. Eight deaths were considered as PEG-related, and were associated with lower serum albumin levels (P = 0.002). On the other hand, among 28 surviving patients (6.5%), PEG was removed. In a multivariate hazard model, older age [hazard ratio (HR), 1.02; 95% confidence interval (CI), 1.00-1.03; P = 0.009], higher C-reactive protein (HR, 1.04; 95% CI: 1.01-1.07; P = 0.005), and higher blood urea nitrogen (HR, 1.01; 95% CI: 1.00-1.02; P = 0.003) were significant poor prognostic factors, whereas higher albumin (HR, 0.67; 95% CI: 0.52-0.85; P = 0.001), female gender (HR, 0.60; 95% CI: 0.48-0.75; P < 0.001) and no previous history of ischemic heart disease (HR, 0.69; 95% CI: 0.54-0.88, P = 0.003) were markedly better prognostic factors.CONCLUSION: These results suggest that more than half of geriatric patients with PEG may survive longer than 2 years. The analysis elucidated prognostic factors.
Aspectos clínicos e técnicos atuais das abordagens anterógrada e retrógrada da interven??o coronária percutanea para a oclus?o cr?nica
Muramatsu, Toshiya;
Revista Brasileira de Cardiologia Invasiva , 2012, DOI: 10.1590/S2179-83972012000100017
Abstract: percutaneous coronary intervention for the treatment of chronic total occlusions (cto) has made remarkable progress in recent years. first of all, appropriate angiographic evaluation is essential to provide clear imaging of the coronary arteries and their branches. observe in detail the pattern, the length and the direction of the cto, the condition of the side branches, the pattern of vessels distal to the occluded segment, and the extent of calcification. evaluate each of the collateral pathways very carefully, and identify the course from the origin to the termination in the distal part of the occluded vessel. secondly, selecting adequate devices for treatment is very important. the antegrade approach, using conventional guidewire and microcatheters is always the first choice. progressively more rigid guidewires may be required, as well as special devices and techniques. the retrograde approach is indicated when the antegrade approach fails, in cases where the entry point of the occlusion is not identified or in patients with extremely calcified lesions. the optimal collateral access for this technique is a wide and straight septal branch, but such ideal vessel is rarely found. the retrograde approach is explained in details, as well as suggestions to overcome eventual obstacles during the procedure. the experience accumulated at our service, along with the different strategies and the use of adequate devices has led to a current procedure success rate in over 90% of the cases of cto.
The death and resurrection of 'economics with psychology': remarks from a methodological standpoint
Muramatsu, Roberta;
Revista de Economia Política , 2009, DOI: 10.1590/S0101-31572009000100004
Abstract: one of the merits of contemporary economic analysis is its capacity to offer accounts of choice behavior that dispense with details of the complex decision machinery. the starting point of this paper is the concern with the important methodological debate about whether economics might offer accurate predictions and explanations of actual behavior without any reference to psychological presuppositions. inspired by an exercise of rational reconstruction of ideas, i aim to offer an interpretation of the process of freeing economic analysis from psychology at the end of the 19th century and the contemporary resurrection of behavioral approaches in the late 1980s.
Recent studies of Charmonium Decays at CLEO
H. Muramatsu
Physics , 2007,
Abstract: Recent results on Charmonium decays are reviewed which includes two-, three- and four-body decays of $\chi_{cJ}$ states, observations of Y(4260) through $\pi\pi J/\psi$ transitions, precise measurements of $M(D^0)$, $M(\eta)$ as well as $\mathcal{B}(\eta\to X)$.
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