K. Isaka, Y. Yokoi, K. Naito, Ryosuke Matsuoka, Susumu Ito, Kenji Sakanishi, Osamu Fujii,
A novel real-time observation system has been developed. It is capable of simultaneously recording visual partial discharge arcs and leakage currents on insulator surfaces under wet-contaminated conditions during a 2-h test. Since this system uses a video recording system uses a video recording system, the discharges and currents can be reproduced repeatedly even at a slowed-down speed. To permit simultaneous recording and accurate data processing of leakage currents, a personal computer is also ...
Tópico(s): CCD and CMOS Imaging Sensors
1990 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Electrical Insulation
K. Naito, Ryosuke Matsuoka, Kenji Sakanishi,
The results of an investigation of the dielectric strength of lichen-contaminated insulators removed from actual transmission lines of three different countries are reported. All of the insulators showed low equivalent salt-deposit density. It seems that lichen on its own cannot cause flashover of the insulators. Flashover may be caused only if the thickness of the lichen is very great and/or there is superposition of salt. >
Tópico(s): High voltage insulation and dielectric phenomena
1990 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Power Delivery
K. Naito, Ryosuke Matsuoka, Susumu Ito, Satoshi Morikawa,
The results of investigations into the cause of certain flashovers which occurred in horizontally mounted insulators in HVDC stations are described. Insulators having various shed shapes were subjected to contamination and wet tests under horizontally and vertically mounted insulators, a slight reduction was found in the contamination withstand voltages of horizontally mounted insulators for some shed profiles. A shed shape is proposed as the optimum design for horizontally mounted insulators from ...
Tópico(s): Lightning and Electromagnetic Phenomena
1989 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Power Delivery
Ryosuke Matsuoka, Susumu Ito, Kenji Sakanishi, K. Naito,
The influence of the diameter on contamination flashover/withstand voltage of cylindrical insulators was investigated both for AC and DC. The increase in diameter of a cylindrical insulator significantly lowers the contaminated flashover/withstand voltage. The increase in diameter also lowers the contaminant deposit density on the insulator surface under the same contamination atmosphere. The decrease in the contamination flashover/withstand voltage is more than that implied in an existing IEC publication. ...
Tópico(s): Power Transformer Diagnostics and Insulation
1991 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Electrical Insulation
Xiang Lin, Z. Chen, X. Liu, Kyoung-Hoon Chu, Kenji Morita, Ryosuke Matsuoka, Susumu Ito,
In Shanghai, China, industrial contamination is very severe and periodic insulator washing is performed not only in substations but also on transmission lines. In order to review the present insulator contamination design and maintenance practices, a series of periodical contamination measurements under de-energized conditions were made. Also insulators that had been energized at two sites for one year were removed, and withstand voltage tests were conducted in an artificial fog chamber. Unexpectedly ...
Tópico(s): Aerosol Filtration and Electrostatic Precipitation
1992 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Electrical Insulation
Ikuo Ikeda, Ryosuke Matsuoka, Tadateru Hamada, Kosuke Mitsui, Sachiko Imabayashi, Akira Uchino, Masao Sato, Eiichi Kuwano, Tomoaki Itamura, Kôji Yamada, Kazunari Tanaka, Katsumi Imaizumi,
Mechanisms of acceleration of cholesterol absorption by cholesterol esterase were investigated in various experimental conditions. Lymphatic recovery of cholesterol intubated as a micellar solution containing phosphatidylcholine (PC) into the duodenum was enhanced by the co-administration of cholesterol esterase in rats drained of bile and pancreatic juice. However, no accelerated incorporation was observed when cholesterol was solubilized in PC-depleted micelles. Cholesterol esterase dose-dependently ...
Tópico(s): Biochemical Analysis and Sensing Techniques
2002 - Elsevier BV | Biochimica et Biophysica Acta (BBA) - General Subjects
Ryosuke Matsuoka, Mamoru Kimura, Ayano Muto, Yasunobu Masuda, Masao Sato, Katsumi Imaizumi,
Eggs are a popular source of dietary cholesterol, but their consumption does not necessarily result in an increased serum cholesterol concentration. We investigated the cholesterol-lowering activity of egg white protein (EWP) and its potential mechanism in rats. The consumption of EWP resulted in a decreased concentration of cholesterol in the serum, liver and intestinal mucosa. The excretion of fecal neutral sterols and bile acids was greater by rats fed with EWP than by those fed with casein. The ...
Tópico(s): Cholesterol and Lipid Metabolism
2008 - Oxford University Press | Bioscience Biotechnology and Biochemistry
Hiromitsu Negoro, Akihiro Kanematsu, Masaaki Imamura, Yu Kimura, Ryosuke Matsuoka, Mitsushi Tanaka, Yasuhiko Tabata, Osamu Ogawa,
Basic fibroblast growth factor is a candidate causative factor of detrusor overactivity in bladder outlet obstruction cases through up-regulation of the gap junction protein connexin 43. We addressed the transcriptional and behavioral implications of this axis.Cx43 and Cx45 mRNA expression was assessed by real-time reverse transcriptase-polymerase chain reaction in the bladder of a rat bladder outlet obstruction model and in cultured rat bladder smooth muscle cells with and without basic fibroblast ...
Tópico(s): Connexins and lens biology
2011 - Lippincott Williams & Wilkins | The Journal of Urology
Seiji Kumagai, Boonruang Marungsri, H. Shinokubo, Ryosuke Matsuoka, Noboru Yoshimura,
Silicone rubbers and porcelain intended for outdoor insulation were tested under electric fields at AC 60 V/mm on average for about two years at the field test site at Chubu University. Leakage currents on all materials were characterized and separated into three categories: sinusoidal, local arc, and their transition components. The porcelain allowed a larger leakage current than the silicone rubber samples, for which the cumulative charge of ca. 160 C was recorded in about two years. The cumulative ...
Tópico(s): Dielectric materials and actuators
2006 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Dielectrics and Electrical Insulation
Boonruang Marungsri, H. Shinokubo, Ryosuke Matsuoka, Seiji Kumagai,
The paper investigates the effects of specimen configuration on the deterioration of silicone rubber insulators in a salt fog ageing test. A cyclic salt fog ageing test was conducted on three types of high-temperature vulcanized silicone rubber (HTV SiR) specimens: two types of insulators having sheds, and plain rods without sheds. The test was based fundamentally on the CIGRE WG 15-04 specifications. After 50 test cycles, the three types of specimens showed different degrees of surface deterioration. ...
Tópico(s): Concrete Corrosion and Durability
2006 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Dielectrics and Electrical Insulation
Toshiyuki Tashiro, Satoshi Seino, Toshihide Sato, Ryosuke Matsuoka, Yasunobu Masuda, Naoshi Fukui,
This study was conducted to investigate the efficacy of oral hyaluronic acid (HA) administration for osteoarthritis (OA) in knee joints. Sixty osteoarthritic subjects (Kellgren-Lawrence grade 2 or 3) were randomly assigned to the HA or placebo group. The subjects in the HA group were given 200 mg of HA once a day everyday for 12 months, while the subjects in the placebo group were given placebo. The subjects in both groups were requested to conduct quadriceps strengthening exercise everyday as part ...
Tópico(s): Periodontal Regeneration and Treatments
2012 - Hindawi Publishing Corporation | The Scientific World JOURNAL
Tadateru Hamada, Ikuo Ikeda, Kayoko Takashima, Makoto Kobayashi, Yoko Kodama, Takashi Inoue, Ryosuke Matsuoka, Katsumi Imaizumi,
Lymphatic recovery of cholesterol infused into the duodenum as bile salt micelles containing phosphatidylcholine (PC) was accelerated by the co-administration of phospholipase A2 in bile and pancreatic juice diverted rats. Previously we observed that cholesterol esterase, which has the ability to hydrolyze PC, caused the same effect under a similar experimental condition (Ikeda et al., Biochim. Biophys. Acta, 1571, 34-44 (2002)). Accelerated cholesterol absorption was also observed when a part of micellar ...
Tópico(s): Fatty Acid Research and Health
2005 - Oxford University Press | Bioscience Biotechnology and Biochemistry
Ryosuke Matsuoka, H. Shinokubo, K. Kondo, Yusuke Mizuno, K. Naito, T. Fujumura, T. TERADA,
Tópico(s): Life Cycle Costing Analysis
1996 - Institute of Electrical and Electronics Engineers | IEEE Power Engineering Review
Masaru Ishii, Minoru Komatsubara, Ryosuke Matsuoka, Taku Matsumoto, Masaaki Kurokawa, K. Naito,
It was reported that the dc flashover voltage under an artificial contamination test sometimes was affected considerably by the type of insoluble materials in the contaminant. To clarify the cause of this phenomenon, the physical characteristics of some contamination slurries and the conductivity of the artificially contaminated insulator surfaces are investigated experimentally. The test results lead to the conclusion that the variation in the flashover voltage is caused mainly by the characteristics ...
Tópico(s): Thermal Analysis in Power Transmission
1996 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Dielectrics and Electrical Insulation
Ryosuke Matsuoka, H. Shinokubo, Kenta Kondo, Yukio Mizuno, K. Naito, T. Fujimura, T. TERADA,
An artificial contamination method for hydrophobic polymer insulators has been developed which can provide a uniform contaminant layer, similar to that found in nature, without either damaging the polymer surface or by adding any chemical agent to the conventional contamination slurry. Using this method, the basic contamination withstand voltage characteristics of polymer insulators were investigated compared with those of porcelain insulators. The results show that although hydrophobic polymer ...
Tópico(s): High voltage insulation and dielectric phenomena
1996 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Power Delivery
Ryosuke Matsuoka, Kenta Kondo, K. Naito, Masaru Ishii,
This paper describes the results of investigation into the influence of a kind of nonsoluble contaminant (Tonoko or Kaolin) on flashover voltages of artificially contaminated insulators. The deposit density of Kaolin on the insulator surface is less than that of Tonoko when contaminated with the suspension containing the same amount of Tonoko or Kaolin. However, a discernible difference is observed in contamination flashover voltage between these two nonsoluble contaminants, not only under DC but ...
Tópico(s): Power Transformer Diagnostics and Insulation
1996 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Power Delivery
Ryosuke Matsuoka, Akihiko Takahashi, Yoshihiko Uchida,
We developed a new scheme for computing “Greeks” of derivatives by an asymptotic expansion approach. In particular, we derived analytical approximation formulae for Deltas and Vegas of plain vanilla and average European call options under general Markovian processes of underlying asset prices. Moreover, we introduced a new variance reduction method of Monte Carlo simulations based on the asymptotic expansion scheme. Finally, several numerical examples under CEV processes confirmed the validity of ...
Tópico(s): Complex Systems and Time Series Analysis
2004 - Springer Science+Business Media | Asia-Pacific Financial Markets
Chinatsu Kawada, Yoshida Takushi, Hideto Yoshida, Ryosuke Matsuoka, Sakamoto Wakako, Wataru Odanaka, Toshihide Sato, Takeshi Yamasaki, Tomoyuki Kanemitsu, Yasunobu Masuda, Osamu Urushibata,
Hyaluronan (HA) is present in many tissues of the body and is essential to maintain moistness in the skin tissues, which contain approximately half the body's HA mass. Due to its viscosity and moisturizing effect, HA is widely distributed as a medicine, cosmetic, food, and, recently marketed in Japan as a popular dietary supplement to promote skin moisture. In a randomized, double-blind, placebo-controlled clinical study it was found that ingested HA increased skin moisture and improved treatment ...
Tópico(s): Polysaccharides Composition and Applications
2014 - BioMed Central | Nutrition Journal
Mariko Oe, Koichi MITSUGI, Wataru Odanaka, Hideto Yoshida, Ryosuke Matsuoka, Satoshi Seino, Tomoyuki Kanemitsu, Yasunobu Masuda,
Hyaluronic acid is a constituent of the skin and helps to maintain hydration. The oral intake of hyaluronic acid increases water in the horny layer as demonstrated by human trials, but in vivo kinetics has not been shown. This study confirmed the absorption, migration, and excretion of (14)C-labeled hyaluronic acid ((14)C-hyaluronic acid). (14)C-hyaluronic acid was orally or intravenously administered to male SD rats aged 7 to 8 weeks. Plasma radioactivity after oral administration showed the highest ...
Tópico(s): Polysaccharides Composition and Applications
2014 - Hindawi Publishing Corporation | The Scientific World JOURNAL
Ryosuke Matsuoka, Bungo Shirouchi, Sayaka Kawamura, Sanae Baba, Sawako Shiratake, Kazuko Nagata, Katsumi Imaizumi, Masao Sato,
Dietary egg white protein (EWP) decreases serum cholesterol levels. We previously showed that EWP decreased cholesterol absorption in the intestine. Rats subjected to permanent lymph duct cannulation were used to investigate the effects of dietary EWP on lipid transport. They were fed diets with 20% EWP and casein, and their lymph was collected to quantify lymphatic lipid levels. Dietary EWP decreased lymphatic cholesterol transport compared with casein. It was previously shown that EWP excluded ...
Tópico(s): Infant Nutrition and Health
2014 - American Chemical Society | Journal of Agricultural and Food Chemistry
Tilakavati Karupaiah, Khun-Aik Chuah, Karuthan Chinna, Ryosuke Matsuoka, Yasunobu Masuda, Kalyana Sundram, Michihiro Sugano,
Mayonnaise is used widely in contemporary human diet with widespread use as a salad dressing or spread on breads. Vegetable oils used in its formulation may be a rich source of ω-6 PUFAs and the higher-PUFA content of mayonnaise may be beneficial in mediating a hypocholesterolemic effect. This study, therefore, evaluated the functionality of mayonnaise on cardiometabolic risk within a regular human consumption scenario. Subjects underwent a randomized double-blind crossover trial, consuming diets ...
Tópico(s): Nutritional Studies and Diet
2016 - BioMed Central | Lipids in Health and Disease
Igor Gutman, R. Hartings, Ryosuke Matsuoka, Kenta Kondo,
This paper covers some examples of the STRI and NGK experience with the standard IEC 1109 salt fog test and some modifications of this test for different types of test objects.
Tópico(s): Thermal Analysis in Power Transmission
1997 - Institute of Electrical and Electronics Engineers | IEEE Electrical Insulation Magazine
Ryosuke Matsuoka, Yayoi Takahashi, Mamoru Kimura, Yasunobu Masuda, Masaaki Kunou,
Egg whites (EW) are a good source of protein; however, they are typically heated prior to consumption. Therefore, we investigated the effects of different heating conditions on the protein utilisation rate of EW. Male Sprague-Dawley rats ( n = 36 , 198 ± 1 g) were divided into six groups and fed American Institute of Nutrition-76 chow containing unheated EW, soft-boiled EW, boiled EW, milk whey protein, soybean protein, or no protein over a 10-day period using pair-feeding. Urine and faeces were sampled ...
Tópico(s): Agriculture Sustainability and Environmental Impact
2017 - Hindawi Publishing Corporation | The Scientific World JOURNAL
Kurataka Otsuka, Yusuke Yamamoto, Ryosuke Matsuoka, Takahiro Ochiya,
Abstract During the last decade, it has been uncovered that microRNAs (miRNAs), a class of small non‐coding RNAs, are related to many diseases including cancers. With an increase in reports describing the dysregulation of miRNAs in various tumor types, it has become abundantly clear that miRNAs play significant roles in the formation and progression of cancers. Intriguingly, miRNAs are present in body fluids because they are packed in exosomes/extracellular vesicles and released from all types of ...
Tópico(s): Genomics, phytochemicals, and oxidative stress
2017 - Wiley | Molecular Nutrition & Food Research
Ryosuke Matsuoka, Bungo Shirouchi, Minami Umegatani, Meguri Fukuda, Ayano Muto, Yasunobu Masuda, Masaaki Kunou, Masao Sato,
Egg-white protein (EWP) is known to reduce lymphatic TAG transport in rats. In this study, we investigated the effects of dietary EWP on body fat mass. Male rats, 4 weeks old, were fed diets containing either 20 % EWP or casein for 28 d. Carcass protein levels and gastrocnemius leg muscle weights in the EWP group were significantly higher than those in the casein group. In addition, carcass TAG levels and abdominal fat weights in the EWP group were significantly lower than those in the casein group; ...
Tópico(s): Diet and metabolism studies
2017 - Cambridge University Press | British Journal Of Nutrition
Hideyuki Hayashi, Shigeki Tanishima, Kyōkō Fujii, Ryo Mori, Yasunobu Okamura, Emmy Yanagita, Ryosuke Matsuoka, Toraji Amano, Ichiro Kinoshita, Yoshito Komatsu, Hirotoshi Dosaka‐Akita, Hiroshi Nishihara,
Precision medicine guided by comprehensive genome sequencing represents a potential treatment strategy for pancreatic cancer. However, clinical sequencing for pancreatic cancer entails several practical difficulties. We have launched an in-house clinical sequencing system and started genomic testing for patients with cancer in clinical practice. We have analyzed the clinical utility of this system in pancreatic cancer.We retrospectively reviewed 20 patients with pancreatic cancer who visited our ...
Tópico(s): Renal cell carcinoma treatment
2018 - Elsevier BV | Pancreatology
Michihisa Kono, Nobuyuki Bandoh, Ryosuke Matsuoka, Takashi Goto, Toshiaki Akahane, Yasutaka Kato, Hiroshi Nakano, Tomomi Yamaguchi, Yasuaki Harabuchi, Hiroshi Nishihara,
Glomangiopericytoma (GPC) is a rare mesenchymal tumor arising from the nasal cavity or paranasal sinuses. GPC was categorized as a borderline and low-malignant-potential tumor by the World Health Organization in 2005 and accounts for less than 0.5% of all sinonasal tumors. We report a case of GPC in a 74-year-old woman with a history of recurrent epistaxis and nasal obstruction. A reddish tumor was seen in the right nasal cavity. Enhanced computed tomography showed a mass lesion occupying the right ...
Tópico(s): Bone Tumor Diagnosis and Treatments
2018 - Springer Science+Business Media | Head and Neck Pathology
Hiroshi Asano, Kanako C. Hatanaka, Ryosuke Matsuoka, Peixin Dong, Takashi Mitamura, Yosuke Konno, Tatsuya Kato, Noriko Kobayashi, Kei Ihira, Ayako Nozaki, Akira Oku, Yoshihiro Matsuno, Yutaka Hatanaka, Hidemichi Watari,
Tópico(s): Sarcoma Diagnosis and Treatment
2019 - Springer Science+Business Media | Annals of Surgical Oncology
Takayuki Nakajima, Takashi Yokota, Yasushige Shingu, Akira Yamada, Yutaka Iba, Kosuke Ujihira, Satoru Wakasa, Tomonori Ōoka, Shingo Takada, Ryosuke Shirakawa, Takashi Katayama, Takaaki Furihata, Arata Fukushima, Ryosuke Matsuoka, Hiroshi Nishihara, Flemming Dela, Katsuhiko Nakanishi, Yoshiro Matsui, Shintaro Kinugawa,
Abstract Epicardial adipose tissue (EAT), a source of adipokines, is metabolically active, but the role of EAT mitochondria in coronary artery disease (CAD) has not been established. We investigated the association between EAT mitochondrial respiratory capacity, adiponectin concentration in the EAT, and coronary atherosclerosis. EAT samples were obtained from 25 patients who underwent elective cardiac surgery. Based on the coronary angiographycal findings, the patients were divided into two groups; ...
Tópico(s): Adipose Tissue and Metabolism
2019 - Nature Portfolio | Scientific Reports
Mingyu Yin, Ryosuke Matsuoka, Yinci Xi, Xichang Wang,
Perturbed lipid metabolism leads to ectopic lipid accumulation in tissues, such as the liver, thereby causing nonalcoholic fatty liver disease (NAFLD) and negatively influencing circulating lipid profile-inducing dyslipidemia. Phospholipids (PLs) with special biological activity are used to treat chronic diseases such as cardiovascular and cerebrovascular disease. PLs derived from egg yolk and soya bean have significant antioxidant and lipid-lowering abilities. This study examined the therapeutic ...
Tópico(s): Diet and metabolism studies
2021 - Multidisciplinary Digital Publishing Institute | Foods