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Search Results: 1 - 10 of 2280 matches for " Tsuyoshi Hayashi "
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A characterization of The operator-valued triangle equality
Tsuyoshi Ando,Tomohiro Hayashi
Mathematics , 2005,
Abstract: We will show that for any two bounded linear operators $X,Y$ on a Hilbert space ${\frak H}$, if they satisfy the triangle equality $|X+Y|=|X|+|Y|$, there exists a partial isometry $U$ on ${\frak H}$ such that $X=U|X|$ and $Y=U|Y|$. This is a generalization of Thompson's theorem to the matrix case proved by using a trace.
Development of a Coil-Shape Photocatalysis-Plasma Synergistic Reactor for a Practical and Long-Term Usable Air-Cleaner  [PDF]
Tsuyoshi Ochiai, Yuji Hayashi, Erina Ichihashi, Tadashi Machida, Yoshitsugu Uchida, Shoko Tago, Yuko Morito, Akira Fujishima
American Journal of Analytical Chemistry (AJAC) , 2014, DOI: 10.4236/ajac.2014.58055
Abstract: A novel air-cleaner with a coil-shape photocatalysis-plasma synergistic reactor was developed. The air-cleaner showed 95% ± 1% reduction of a TVOCs concentration in tobacco smoke at “single-pass” condition. Air-purification activity of the air-cleaner was stably-maintained after the treatment of 12,000 cigarettes of tobacco smoke.
A New Rotator Interval Approach for Antegrade Humeral Nailing: A Technical Note  [PDF]
Naxin Liu, Toshikazu Mohri, Junzou Hayashi, Ryo Orito, Tsuyoshi Nakai, Yasushi Yoneda
Open Journal of Orthopedics (OJO) , 2014, DOI: 10.4236/ojo.2014.411049
Abstract: The lateral and anterior lateral approaches are the most commonly used for antegrade nailing of humerus fractures. However, the surgical exposure is restricted by the bony acromion. The iatrogenic injury to the rotator cuff can also cause post-operative pain and compromise shoulder function. This article describes a new rotator interval approach that we used for central entry point nailing. In this approach, the skin incision starts from the midpoint between the acromion and coracoid process. A trans-rotator interval split in front of the anterior border of the supraspinatus (SSP) tendon is then made to open the glenohumeral joint. With the SSP retracted laterally and the long head of the biceps (LHB) retracted medially, the humeral head is directly visualized. The entry point can thus be determined and confirmed by intra-operative fluoroscopy in both axial and AP planes. We recommend this rotator interval approach as an alternative nailing technique for 2-part humeral neck fractures and humeral shaft fractures.
Enhanced Cytotoxicity for Colon 26 Cells Using Doxorubicin-Loaded Sorbitan Monooleate (Span 80) Vesicles
Keita Hayashi, Tsuyoshi Tatsui, Toshinori Shimanouchi, Hiroshi Umakoshi
International Journal of Biological Sciences , 2013,
Abstract: Span 80 (sorbitan monooleate) vesicles behaved differently from conventional phospholipid vesicles (liposomes) because the former had a more fluid interface. After doxorubicin hydrochloride (DOX) was encapsulated into the Span 80 vesicle (loading efficiency: 63 %), DOX-loaded Span 80 vesicles (DVs) were thereafter added to Colon 26 cells. It was suggested, from the flow cytometric analysis and confocal laser microscopic observation, that DVs directly deliver DOX into the cytoplasm of Colon 26 cells. DVs showed the different delivery manner from the DOX-loaded liposomes (DLs). It is considered that the difference of delivery manner between DVs and DLs resulted in the difference of cytotoxicity (IC50); i.e. IC50 values for DVs and DLs were 5 and > 30 μM, respectively. The results obtained herein would give the fundamental findings which can contribute to the improvement of formulation of conventional liposome-based carrier and its cytotoxicity.
Genetics of Endometrial Cancers
Tsuyoshi Okuda,Akihiko Sekizawa,Yuditiya Purwosunu,Masaaki Nagatsuka,Miki Morioka,Masaki Hayashi,Takashi Okai
Obstetrics and Gynecology International , 2010, DOI: 10.1155/2010/984013
Abstract: Endometrial cancers exhibit a different mechanism of tumorigenesis and progression depending on histopathological and clinical types. The most frequently altered gene in estrogen-dependent endometrioid endometrial carcinoma tumors is PTEN. Microsatellite instability is another important genetic event in this type of tumor. In contrast, p53 mutations or Her2/neu overexpression are more frequent in non-endometrioid tumors. On the other hand, it is possible that the clear cell type may arise from a unique pathway which appears similar to the ovarian clear cell carcinoma. K-ras mutations are detected in approximately 15%–30% of endometrioid carcinomas, are unrelated to the existence of endometrial hyperplasia. A -catenin mutation was detected in about 20% of endometrioid carcinomas, but is rare in serous carcinoma. Telomere shortening is another important type of genomic instability observed in endometrial cancer. Only non-endometrioid endometrial carcinoma tumors were significantly associated with critical telomere shortening in the adjacent morphologically normal epithelium. Lynch syndrome, which is an autosomal dominantly inherited disorder of cancer susceptibility and is characterized by a MSH2/MSH6 protein complex deficiency, is associated with the development of non-endometrioid carcinomas. 1. Introduction Endometrial cancer is the most common cancer of the female reproductive tract with 150,000 new cases diagnosed annually worldwide. Approximately 90% of endometrial cancers are sporadic, and the remaining 10% are hereditary. Bokhman have generally categorized endometrial cancer into two broad groups of tumors using both clinical and histopathological variables: estrogen-dependent endometrioid endometrial carcinomas (EECs), or type I, and non-endometrioid endometrial carcinomas (NEECs), or type II tumors (Table 1) [1]. It should be noted that this model is not strict, and only a minority of endometrial cancer may exhibit shared characteristics. For example, mixed serous and endometrioid tumors are being increasingly recognized. Approximately 70% to 80% of new cases are classified as EECs, and other 10% to 20% are designated as NEEC tumors [1]. EECs are strongly associated with the estrogen-related pathway and arise in association with unopposed estrogen stimulation [2]. In contrast, NEECs are unrelated to the estrogen pathways and arise in the background of atrophic endometrium [3]. EECs typically occur in premenopausal and younger postmenopausal women and are usually low-grade and have a favorable outcome, whereas NEECs occur in older postmenopausal
Resurrection of a Bull by Cloning from Organs Frozen without Cryoprotectant in a ?80°C Freezer for a Decade
Yoichiro Hoshino, Noboru Hayashi, Shunji Taniguchi, Naohiko Kobayashi, Kenji Sakai, Tsuyoshi Otani, Akira Iritani, Kazuhiro Saeki
PLOS ONE , 2009, DOI: 10.1371/journal.pone.0004142
Abstract: Frozen animal tissues without cryoprotectant have been thought to be inappropriate for use as a nuclear donor for somatic cell nuclear transfer (SCNT). We report the cloning of a bull using cells retrieved from testicles that had been taken from a dead animal and frozen without cryoprotectant in a ?80°C freezer for 10 years. We obtained live cells from defrosted pieces of the spermatic cords of frozen testicles. The cells proliferated actively in culture and were apparently normal. We transferred 16 SCNT embryos from these cells into 16 synchronized recipient animals. We obtained five pregnancies and four cloned calves developed to term. Our results indicate that complete genome sets are maintained in mammalian organs even after long-term frozen-storage without cryoprotectant, and that live clones can be produced from the recovered cells.
Proteomic Analysis of Growth Phase-Dependent Expression of Legionella pneumophila Proteins Which Involves Regulation of Bacterial Virulence Traits
Tsuyoshi Hayashi,Masahiro Nakamichi,Hirotaka Naitou,Norio Ohashi,Yasuyuki Imai,Masaki Miyake
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0011718
Abstract: Legionella pneumophila, which is a causative pathogen of Legionnaires' disease, expresses its virulent traits in response to growth conditions. In particular, it is known to become virulent at a post-exponential phase in vitro culture. In this study, we performed a proteomic analysis of differences in expression between the exponential phase and post-exponential phase to identify candidates associated with L. pneumophila virulence using 2-Dimentional Fluorescence Difference Gel Electrophoresis (2D-DIGE) combined with Matrix-Assisted Laser Desorption/Ionization–Mass Spectrometry (MALDI-TOF-MS). Of 68 identified proteins that significantly differed in expression between the two growth phases, 64 were up-regulated at a post-exponential phase. The up-regulated proteins included enzymes related to glycolysis, ketone body biogenesis and poly-3-hydroxybutyrate (PHB) biogenesis, suggesting that L. pneumophila may utilize sugars and lipids as energy sources, when amino acids become scarce. Proteins related to motility (flagella components and twitching motility-associated proteins) were also up-regulated, predicting that they enhance infectivity of the bacteria in host cells under certain conditions. Furthermore, 9 up-regulated proteins of unknown function were found. Two of them were identified as novel bacterial factors associated with hemolysis of sheep red blood cells (SRBCs). Another 2 were found to be translocated into macrophages via the Icm/Dot type IV secretion apparatus as effector candidates in a reporter assay with Bordetella pertussis adenylate cyclase. The study will be helpful for virulent analysis of L. pneumophila from the viewpoint of physiological or metabolic modulation dependent on growth phase.
Chromosome 4q;10q translocations; Comparison with different ethnic populations and FSHD patients
Tsuyoshi Matsumura, Kanako Goto, Gaku Yamanaka, Je Lee, Cheng Zhang, Yukiko K Hayashi, Kiichi Arahata
BMC Neurology , 2002, DOI: 10.1186/1471-2377-2-7
Abstract: To clarify the influence on the deletion of the repeats, we surveyed three different ethnic populations and FSHD patients using the BglII/BlnI dosage test.The frequency of translocation in 153 Japanese, 124 Korean, 114 Chinese healthy individuals and 56 Japanese 4q35-FSHD patients were 27.5%, 29.8%, 19.3%, and 32.1%, respectively. The ratio of '4 on 10' (trisomy and quatrosomy of chromosome 4) was higher than that of '10 on 4' (nullsomy and monosomy of chromosome 4) in all populations.The inter-chromosomal exchange was frequently observed in all four populations we examined, and no significant difference was observed between healthy and diseased groups.Facioscapulohumeral muscular dystrophy (FSHD) is a common form of muscular disorder with an autosomal dominant trait. FSHD is characterized by weakness and atrophy of facial, shoulder-girdle and humeral muscles, with occasional subsequent pelvic-girdle and lower limb involvement. More than 95% of patients with FSHD have a smaller (< 35 kb) EcoRI fragment on chromosome 4q35 detected by probe p13E-11 and are called 4q35-FSHD [1-3]. This EcoRI fragment in normal individuals contains tandem repeated 3.3-kb KpnI units (D4Z4) varying from 11 to 150 in number, while 4q35-FSHD patients showed less than ten units [2,3]. No responsible gene has been isolated within the FSHD gene region.Probe p13E-11 cross-hybridizes with chromosome 10q26, which contains highly homologous 3.3-kb KpnI repeated units. Since the BlnI restriction enzyme site exists exclusively within each unit derived from 10q26, but not in D4Z4 (an unit from 4q35), double enzyme digestion using EcoRI and BlnI can discriminate as 4q35 (BlnI-resistant) and 10q26 (BlnI-sensitive) units [4]. In a Dutch control population, subtelomeric translocations between chromosomes 4 and 10 were seen in about 20% of individuals [5-7]. Furthermore, somatic mosaicism was found in 40% of de novo FSHD families and 46% of these individuals had BlnI-resistant units on chromosome 10 [8].
Swine influenza virus infection in different age groups of pigs in farrow-to-finish farms in Thailand
Nobuhiro Takemae, Sujira Parchariyanon, Ruttapong Ruttanapumma, Yasuaki Hiromoto, Tsuyoshi Hayashi, Yuko Uchida, Takehiko Saito
Virology Journal , 2011, DOI: 10.1186/1743-422x-8-537
Abstract: We conducted longitudinal monitoring in 6 farrow-to-finish farms in the central region of Thailand from 2008 to 2009. Nasal swabs and serum samples were collected periodically from clinically healthy pigs consisting of sows, fattening pigs, weaned piglets and pigs transferred from other farms. A total of 731 nasal swabs were subjected to virus isolation and 641 serum samples were subjected to detection of SIV antibodies against H1 and H3 subtypes using the hemagglutination inhibition test and ELISA. Twelve SIVs were isolated in this study and eleven were from piglets aged 4 and 8 weeks. Phylogenetical analysis revealed that SIVs isolated from different farms shared a common ancestor. Antibodies against SIVs were detected in fattening pigs on farms with no SIV isolation in the respective periods studied. These observations suggested that piglets aged 8 weeks or younger could be a main target for SIV isolation. Farm-to-farm transmission was suggested for farms where pigs from other farms are introduced periodically. In addition, antibodies against SIVs detected in fattening pigs could be a marker for SIV infection in a farm.The present study provided important information on SIV surveillance that will enable better understanding of SIV ecology in farrow-to-finish farms.Swine influenza virus (SIV) is one of the pathogens that cause respiratory diseases accompanied with coughing and sneezing in pigs [1]. This virus is considered an important pathogen not only from the viewpoint of animal health but also from that of public health [1-3]. Pigs can play the role of a 'mixing vessel' producing a novel influenza virus by genetic reassortment [4] as they have dual susceptibility to both human and avian influenza viruses [5]. Both receptors, namely, the sialic acid linked to galactose by an α2,6 linkage (SAα2,6Gal) for human viruses and an SAα2,3Gal for avian viruses, are expressed on epithelial cells of the tracheal and pulmonary structures of pigs [6,7]. The segmented nature
On Test Data Compression Using Selective Don’t-Care Identification
On Test Data Compression Using Selective Don t-Care Identification

Terumine Hayashi,Haruna Yoshioka,Tsuyoshi Shinogi,Hidehiko Kita,Haruhiko Takase,
TerumineHayashi
,HarunaYoshioka,TsuyoshiShinogi,HidehikoKita,HaruhikoTakase

计算机科学技术学报 , 2005,
Abstract: This paper proposes an effective method for reducing test data volume under multiple scan chain designs. The proposed method is based on reduction of distinct scan vectors using selective dont-care identification. Selective dont-care identification is repeatedly executed under condition that each bit of frequent scan vectors is fixed to binary values (0 or 1). Besides, a code extension technique is adopted for improving compression efficiency with keeping decompressor circuits simple in the manner that the code length for infrequent scan vectors is designed as double of that for frequent ones. The effectiveness of the proposed method is shown through experiments for ISCAS89 and ITC99 benchmark circuits.
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