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Effect of Plastic Working on Fatigue Properties of Ti-6Al-4V Alloy with Notch
Hattori, Nobusuke,Nishida, Shinichi,Hara, Masahiro,Son, Sun Young Trans Tech Publications, Ltd. 2005 Key Engineering Materials Vol.297 No.-
<P>This study is focused to the effects of plastic working on the fatigue strength of Ti-6Al-4V alloy with notch. In general, the fatigue strength of plastic worked specimen is higher than that of non-worked one. However, the potential of hardening ability of Ti-6Al-4V alloy is very limited. Accordingly, the effect of work hardening on fatigue strength about this material is very small. In addition, the surface of the worked part becomes rougher with increasing plastic deformed value and the fatigue cracks initiate at this part. Consequently, the fatigue limit of the plastic worked specimen is lower than that of the non-plastic-worked one.</P>
Satoshi Hattori,Naomi Omi,Zhou Yang,Moeka Nakamura,Masahiro Ikemoto 한국운동영양학회 2021 Physical Activity and Nutrition (Phys Act Nutr) Vol.25 No.2
[Purpose] Skeletal muscle glycogen is a determinant of endurance capacity for some athletes. Ginger is well known to possess nutritional effects, such as anti-diabetic effects. We hypothesized that ginger extract (GE) ingestion increases skeletal muscle glycogen by enhancing fat oxidation. Thus, we investigated the effect of GE ingestion on exercise capacity, skeletal muscle glycogen, and certain blood metabolites in exercised rats. [Methods] First, we evaluated the influence of GE ingestion on body weight and elevation of exercise performance in rats fed with different volumes of GE. Next, we measured the skeletal muscle glycogen content and free fatty acid (FFA) levels in GE-fed rats. Finally, we demonstrated that GE ingestion contributes to endurance capacity during intermittent exercise to exhaustion. [Results] We confirmed that GE ingestion increased exercise performance (p<0.05) and elevated the skeletal muscle glycogen content compared to the non- GE-fed (CE, control exercise) group before exercise (Soleus: p<0.01, Plantaris: p<0.01, Gastrocnemius: p<0.05). Blood FFA levels in the GE group were significantly higher than those in the CE group after exercise (p<0.05). Moreover, we demonstrated that exercise capacity was maintained in the CE group during intermittent exercise (p<0.05). [Conclusion] These findings indicate that GE ingestion increases skeletal muscle glycogen content and exercise performance through the upregulation of fat oxidation.
Yukari Hattori,Taro Kojima,Hiroaki Komura,Nobuyuki Ura,Masahiro Akishita 대한노인병학회 2019 Annals of geriatric medicine and research Vol.23 No.1
Background: Although the notion of percutaneous endoscopic gastrostomy (PEG) tube placement for patients with dementia has been changing, the number of cases of PEG placement remains high as Japan has become a super-aged society. However, there is insufficient research about the clinical course of dementia patients with PEG, especially regarding PEG extubation after regaining full oral intake. This case series aimed to reveal the demographic data of patients who successfully underwent PEG extubation and to identify clinical factors that might help predict eventual resumption. Methods: This retro-spective case series was identified in a private, community-based long-term care hospital in Sapporo, Japan. Inclusion criteria for the series were: 1) age, ≥75 years, 2) diagnosis of any type of dementia, and 3) resumption of full oral intake after removal of PEG tubes. Re-sults: Eight female patients were identified. Decreased oral intake was triggered by acute medical conditions, such as infectious enteritis. A trial of oral intake was initiated mostly by speech therapists. A majority of the patients ate pureed food. The patients aged ≥85 years with advanced dementia could be weaned from PEG tubes. Conclusion: The series indicates that even patients with limited life expectancy could recover swallowing function by receiving appropriate guidance and care. Constant evaluation for swallowing function even after PEG insertion may be important for PEG extubation.
Bioinformatics Application of Chemical Transformation Rules in Metabolic Reactions
( Susumu Goto ),( Masahiro Hattori ),( Yugo Shimizu ),( Masaaki Kotera ),( Toshiaki Tokimatsu ),( Yuki Moriya ),( Zen Ichi Nakagawa ),( Minoru Kanehisa ) 한국응용생명화학회 2008 Journal of Applied Biological Chemistry (J. Appl. Vol.51 No.5
Hara, Masanori,Hattori, Daiki,Inukai, Junji,Bae, Byungchan,Hoshi, Takayuki,Hara, Masaya,Miyatake, Kenji,Watanabe, Masahiro American Chemical Society 2013 The journal of physical chemistry. B, Condensed ma Vol.117 No.14
<P>The proton-conductive spots on the membrane surface of sulfonated poly(arylene ether) multiblock copolymer were successfully imaged by current-sensing atomic force microscopy under hydrogen atmosphere at various temperatures and humidities. These spots should be connected to the proton-conductive paths inside the membrane. The average diameter of the spots was approximately 12 nm, consistent with the size of hydrophilic domains observed by transmission electron microscopy. The size of the proton-conducting spots was almost unchanged regardless of the temperature and humidity, whereas the number of the spots increased at higher humidity; the total area of the proton-conducting spots increased accordingly on the membrane surface. This increase in the conducting area at high humidity should be related to the bulk ionic conductivity measured by impedance spectroscopy.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jpcbfk/2013/jpcbfk.2013.117.issue-14/jp312041c/production/images/medium/jp-2012-12041c_0011.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/jp312041c'>ACS Electronic Supporting Info</A></P>
Kato, Yoshihito,Tada, Yutaka,Urano, Kunihiko,Hattori, Masahiro,Nagatsu, Yuichiro,Koh, Song-Tae,Lee, Young-Sei 社団法人 化学工学会 2010 化學工學論文集 Vol.36 No.1
<P>Numerous studies on power consumption in mixing vessels have been reported, and several power correlations have been developed for non-baffled mixing vessels, for example, Nagata's correlations. However, baffled mixing vessels with different impeller geometries have different power numbers. In this paper, the effects of vessel bottom shape, number of blades, and impeller position on power number were measured for several impellers with geometries that had been assumed to have the same power in Nagata's concept. It was found that power numbers in baffled vessels varied greatly with impeller geometry, while Nagata's concept is valid for non-baffled vessels, regardless of impeller position.</P>
( Sanshiro Yasuma ),( Sakurako Kato ),( Takuya Usami ),( Yusuke Hattori ),( Yuji Joyo ),( Hiroo Shiraga ),( Masahiro Nozaki ),( Hideki Murakami ),( Yuko Waguri-nagaya ) 대한슬관절학회 2024 대한슬관절학회지 Vol.36 No.-
Background Anterior knee pain due to patellar maltracking following total knee arthroplasty (TKA) reduces patients’ satisfaction. This study aimed to determine the patellofemoral pressure (PFP) in patients with favorable patellar tracking (FT) and impaired patellar tracking (IT) following TKA, the factors causing patellar maltracking, and the effect of lateral retinacular release (LRR) on patients with IT. Methods Forty-four patients with varus knee osteoarthritis undergoing cruciate-retaining TKA were enrolled. After component implantation, patients with a separation of ≥ 2 mm of the patellar medial facet from the medial femoral trochlea throughout knee range of motion were classified into the IT group; meanwhile, the others were classified into the FT group. PFP was measured intraoperatively in three phases: (1) with the resurfaced patella (RP); (2) with the resurfaced patella and knee (RPK); and (3) when LRR was performed in IT (post-LRR). The PFPs at 0°, 90°, 120°, and 135° knee flexion were compared between FT and IT using the Mann-Whitney U test. Pairwise comparison of the PFP in IT between RPK and post-LRR was performed using the Wilcoxon signed-rank test. Correlations between PFP and pre- and postoperative radiographic parameters, such as hip-knee-ankle angle, lateral distal femoral angle, medial proximal tibial angle, anterior femoral offset, Insall-Salvati ratio (ISR), patellar tilt, and patellar resection angle (PRA), were evaluated using Spearman’s rank correlation coefficients. Results High lateral PFP in the knee flexion position led to patellar maltracking. Patients with IT (n = 24) had higher lateral and lower medial PFP than did patients with FT (n = 20) at 90°, 120°, and 135° knee flexion in RP and RPK. LRR in IT reduced the lateral PFP in the knee flexion position. PRA and ISR were correlated with the lateral PFP at no less than 90° in RP and RPK. Conclusions This study demonstrated that internal rotational patellar resection, which resulted in a thick medial patellar remnant and a thin lateral counterpart, and patella alta were the causative factors of high lateral PFP, which induced patellar maltracking after TKA. Surgeons should avoid internal rotational patellar resection to achieve FT and perform LRR in patients with patellar maltracking.
ADVANTAGES OF THE AKARI FIR ALL-SKY MAPS
YASUO DOI,SATOSHI TAKITA,TAKAFUMI OOTSUBO,KO ARIMATSU,MASAHIRO TANAKA,TAKAHIRO MORISHIMA,MITSUNOBU KAWADA,SHUJI MATSUURA,YOSHIMI KITAMURA,MAKOTO HATTORI,TAKAO NAKAGAWA,GLENN WHITE,NORIO IKEDA 한국천문학회 2017 天文學論叢 Vol.32 No.1
We present the {\it AKARI} far-infrared (FIR) all-sky maps and describe its characteristics, calibration accuracy and scientific capabilities. The {\it AKARI} FIR survey has covered 97\% of the whole sky in four photometric bands, which cover continuously 50--180 micron with band central wavelengths of 65, 90, 140, and 160 microns. The data have been publicly released in 2014 \citep{2015PASJ...67...50D} with improved data quality that have been achieved since the last internal data release \citep{2012PKAS...27..111D}. The accuracy of the absolute intensity is $\leq10$\% for the brighter regions. Quantitative analysis of the relative intensity accuracy and its dependence upon spatial scan numbers has been carried out. The data for the first time reveal the whole sky distribution ofinterstellar matter with arcminute-scale spatial resolutions at the peakof dust continuum emission, enabling us to investigate large-scaledistribution of interstellar medium in great detail. The filamentarystructure covering the whole sky is well traced by the all-sky maps. We describe advantages of the AKARI FIR all-sky maps for the study of interstellar matter comparing to other observational data.