1,152 results on '"Hiroaki, Sato"'
Search Results
252. Comparative proteomic analysis of Methanothermobacter themautotrophicus ΔH in pure culture and in co-culture with a butyrate-oxidizing bacterium.
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Miho Enoki, Naoya Shinzato, Hiroaki Sato, Kohei Nakamura, and Yoichi Kamagata
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Medicine ,Science - Abstract
To understand the physiological basis of methanogenic archaea living on interspecies H(2) transfer, the protein expression of a hydrogenotrophic methanogen, Methanothermobacter thermautotrophicus strain ΔH, was investigated in both pure culture and syntrophic coculture with an anaerobic butyrate oxidizer Syntrophothermus lipocalidus strain TGB-C1 as an H(2) supplier. Comparative proteomic analysis showed that global protein expression of methanogen cells in the model coculture was substantially different from that of pure cultured cells. In brief, in syntrophic coculture, although methanogenesis-driven energy generation appeared to be maintained by shifting the pathway to the alternative methyl coenzyme M reductase isozyme I and cofactor F(420)-dependent process, the machinery proteins involved in carbon fixation, amino acid synthesis, and RNA/DNA metabolisms tended to be down-regulated, indicating restrained cell growth rather than vigorous proliferation. In addition, our proteome analysis revealed that α subunits of proteasome were differentially acetylated between the two culture conditions. Since the relevant modification has been suspected to regulate proteolytic activity of the proteasome, the global protein turnover rate could be controlled under syntrophic growth conditions. To our knowledge, the present study is the first report on N-acetylation of proteasome subunits in methanogenic archaea. These results clearly indicated that physiological adaptation of hydrogenotrophic methanogens to syntrophic growth is more complicated than that of hitherto proposed.
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- 2011
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253. Flowage of the 1991 Unzen lava; discussions to ‘Rigid migration of Unzen lava rather than flow’ J. Volcanol. Geotherm. Res., 110, 107073
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Tadahide Ui, Toshitsugu Fujii, Takahiro Yamamoto, Shinji Takarada, Hiroaki Sato, Keiichi Sakaguchi, and Shigeru Suto
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Geophysics ,Geochemistry and Petrology ,Lava ,Flow (psychology) ,Dacite ,Petrology ,Geothermal gradient ,Geology - Abstract
This discussion concerns the flowage of the 1991 lava lobes at Unzen that were suggested by Goto et al. (2020) to be moving rigidly. Pictorial evidence of flowage of the 1991 lava lobe of Unzen, such as morphological change of the lava lobe, protrusion of the front of lava lobe, crease structure, and wrinkle surface of lava blocks, are presented. Differences in the interpretation of flow mechanisms may reflect slight difference in temperature and glass composition of the lavas. Temperatures used by Goto et al. (2020) were 780–880 °C, whereas those estimated by Venezky and Rutherford (1999) were 900 ± 30 °C. The groundmass glass compositions of 1991 blocks of Unzen dacite used by Goto et al. (2020) are 1–2 wt% higher in SiO2 than those of Nakada and Motomura (1999) and ours, suggesting that the samples used by Goto et al. (2020) represent the cooler rigid parts of the lava lobes. The lava viscosity is delicately influenced by cooling, dewatering, and crystallization during eruption. The direct application of experimental results to understanding the rheological behavior of natural lavas needs much more careful consideration.
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- 2021
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254. Histidine-Rich Glycoprotein Functions as a Dual Regulator of Neutrophil Activity in Horses
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Hiroshi Matsuda, Ryo Muko, Akane Tanaka, Masa-aki Oikawa, Taekyun Shin, Hiroaki Sato, Tomoya Sunouchi, and Kenshiro Matsuda
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Histidine-rich glycoprotein ,Neutrophils ,040301 veterinary sciences ,Phagocytosis ,law.invention ,0403 veterinary science ,Immune system ,law ,Lysosome ,medicine ,Animals ,Humans ,Horses ,chemistry.chemical_classification ,Reactive oxygen species ,Equine ,0402 animal and dairy science ,Proteins ,04 agricultural and veterinary sciences ,040201 dairy & animal science ,Molecular biology ,Blood proteins ,Systemic Inflammatory Response Syndrome ,Chemotaxis, Leukocyte ,medicine.anatomical_structure ,chemistry ,Recombinant DNA ,Horse Diseases ,Glycoprotein - Abstract
Histidine-rich glycoprotein (HRG) is an abundant plasma protein that has been identified in most mammals. We first identified whole genome sequence of equine HRG (eHRG) and succeeded to purify eHRG from plasma of horses. Since HRG interacts with various ligands, this protein is thought to be involved in immune response, coagulation, and angiogenesis. Systemic inflammatory response syndrome (SIRS) is characterized as a non-specific, clinical, pro-inflammatory immune response that damage organs and tissues in the host. Recent reports revealed that blood HRG levels in human patients with SIRS are approximately 50% lower than those in healthy controls, indicating the use of HRG as a biomarker or treatment for SIRS. SIRS is also a serious issue in equine medicine. In this study, we investigated various effects of eHRG on neutrophil functions, including adhesion, migration, phagocytosis, reactive oxygen species (ROS) production, and lysosome maturation using neutrophils isolated from horses. Microscopic observation showed that the addition of eHRG to the culture diminished adhesion of neutrophils stimulated with LPS. Using the Boyden chamber technique, we showed that eHRG reduced neutrophil chemotaxis induced by recombinant human IL-8. Luminol-dependent chemiluminescence assay demonstrated that eHRG restrained the peak of LPS-promoted ROS production from neutrophils. In contrast, eHRG promoted phagocytic activity evaluated with uptake of fluorescent dye conjugated particles, as well as lysosomal maturation assessed using fluorescent staining for lysosomes of equine neutrophils. These results indicated that eHRG acts as a dual regulator of neutrophils in horses.
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- 2021
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255. Hypervascular Vestibular Schwannomas: Clinical Characteristics, Angiographical Classification, and Surgical Considerations
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Osamu Nagata, Michihiro Kohno, Shigeo Sora, Hiroaki Sato, and Yu Teranishi
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Adult ,Male ,medicine.medical_specialty ,External carotid artery ,Acoustic neuroma ,Schwannoma ,Stain ,Neurosurgical Procedures ,030218 nuclear medicine & medical imaging ,Young Adult ,03 medical and health sciences ,0302 clinical medicine ,medicine.artery ,medicine ,Humans ,Child ,Aged ,Retrospective Studies ,medicine.diagnostic_test ,business.industry ,Retrospective cohort study ,Neuroma, Acoustic ,Middle Aged ,medicine.disease ,Neuroma ,Cerebral Angiography ,Angiography ,Female ,Surgery ,Neurology (clinical) ,Radiology ,business ,030217 neurology & neurosurgery ,Cerebral angiography - Abstract
Background There is a rare type of vestibular schwannoma, scarcely discussed in the literature, known as a hypervascular vestibular schwannoma (HVS). Objective To evaluate its biological characteristics, angiographical classification, surgical outcomes, and the significance for surgical consideration, using a large series of this clinical entity. Methods The definition for HVS in this study was the tumor stain from the vertebrobasilar system (VBS) in angiography. The authors conducted a retrospective analysis of 36 patients who were angiographically diagnosed with HVS and underwent surgery between 2008 and 2015. Their biological findings and their surgical outcomes were compared with non-HVS subjects. With regard to the tumor feeders and AV shunt, we classified HVS into 5 types. Results HVS occurred more commonly in younger subjects (mean: 39.4 yr), as a larger solid tumor with multiple flow voids (mean: 34.1 mm), and involved higher levels of cerebrospinal fluid protein (mean: 202 mg/dl) and a higher MIB1-index (mean: 4.3%). The average resection rate for these 36 cases was 95.3%, and recurrence was seen in 6 cases (16.7%). Compared with non-HVS, the extent of tumor resection was significantly lower, and the recurrence rate was significantly higher. Especially in HVS type 2B (the tumor stain is fed by the VBS and the external carotid artery, with an arteriovenous shunt from the VBS), the recurrence-free survival duration was significantly shorter compared with other HVS types and non-HVS, and HVS type 2B exhibited an identifiable risk factor for recurrence. Conclusion HVS have the distinct clinical characteristics compared with those of non-HVS subjects.
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- 2017
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256. Data on the chemical properties of commercial fish sauce products
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Hiroaki Sato, Ryosuke Koizumi, Katsumi Takano, Yoshimasa Sagane, Mitsutoshi Nakano, Masao Yamazaki, Toshihiro Watanabe, and Yozo Nakazawa
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Salinity ,Protein digestion ,Fish sauce ,chemistry.chemical_element ,Agricultural and Biological Sciences ,Chemical property ,lcsh:Computer applications to medicine. Medical informatics ,01 natural sciences ,pH meter ,0404 agricultural biotechnology ,Fermented foods ,Food science ,lcsh:Science (General) ,Fermentation in food processing ,Flavor ,Multidisciplinary ,Moisture ,010401 analytical chemistry ,04 agricultural and veterinary sciences ,040401 food science ,Nitrogen ,0104 chemical sciences ,chemistry ,lcsh:R858-859.7 ,Titration ,lcsh:Q1-390 - Abstract
This data article reports on the chemical properties of commercial fish sauce products associated with the fish sauce taste and flavor. All products were analyzed in triplicate. Dried solid content was analyzed by moisture analyzer. Fish sauce salinity was determined by a salt meter. pH was measured using a pH meter. The acidity was determined using a titration assay. Amino nitrogen and total nitrogen were evaluated using a titration assay and Combustion-type nitrogen analyzer, respectively.The analyzed products originated from Japan, Thailand, Vietnam, China, the Philippines, and Italy. Data on the chemical properties of the products are provided in table format in the current article. Keywords: Fish sauce, Chemical property, Salinity, Protein digestion, Fermented foods
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- 2017
257. Substitutions at residues 300 and 389 of the VP2 capsid protein serve as the minimal determinant of attenuation for canine parvovirus vaccine strain 9985-46
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Eiji Oishi, Risa Kainuma, Morimasa Yamanaka, Go Sehata, Sho Oshima, Hiroaki Sato, Tatsuhiko Igarashi, Taichi Noro, and Takuo Takahashi
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0301 basic medicine ,Parvovirus, Canine ,Virulence Factors ,viruses ,DNA Mutational Analysis ,Host tropism ,Virulence ,Vaccines, Attenuated ,medicine.disease_cause ,Virus ,Cell Line ,Parvoviridae Infections ,03 medical and health sciences ,Dogs ,Serial passage ,Virology ,medicine ,Animals ,Dog Diseases ,Serial Passage ,Mutation ,Attenuated vaccine ,biology ,Parvovirus ,Canine parvovirus ,Viral Vaccines ,biology.organism_classification ,030104 developmental biology ,Amino Acid Substitution ,Animals, Newborn ,Capsid Proteins - Abstract
Identifying molecular determinants of virulence attenuation in live attenuated canine parvovirus (CPV) vaccines is important for assuring their safety. To this end, we identified mutations in the attenuated CPV 9985-46 vaccine strain that arose during serial passage in Crandell-Rees feline kidney cells by comparison with the wild-type counterpart, as well as minimal determinants of the loss of virulence. Four amino acid substitutions (N93K, G300V, T389N and V562L) in VP2 of strain 9985-46 significantly restricted infection in canine A72 cells. Using an infectious molecular clone system, we constructed isogenic CPVs of the parental virulent 9985 strain carrying single or double mutations. We observed that only a single amino acid substitution in VP2, G300V or T389N, attenuated the virulent parental virus. Combinations of these mutations further attenuated CPV to a level comparable to that of 9985-46. Strains with G300V/T389N substitutions did not induce clinical symptoms in experimentally infected pups, and their ability to infect canine cells was highly restricted. We found that another G300V/V562L double mutation decreased affinity of the virus for canine cells, although its pathogenicity to dogs was maintained. These results indicate that mutation of residue 300, which plays a critical role in host tropism, is not sufficient for viral attenuation in vivo, and that attenuation of 9985-46 strain is defined by at least two mutations in residues 300 and 389 of the VP2 capsid protein. This finding is relevant for quality control of the vaccine and provides insight into the rational design of second-generation live attenuated vaccine candidates.
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- 2017
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258. Data on the sensory evaluation of potatoes (Solanum tuberosum) from different areas of Hokkaido, Japan, performed by untrained young adults
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Rui Sakuma, Yoshimasa Sagane, Yozo Nakazawa, Katsumi Takano, Ryuichi Itoyama, Ryosuke Koizumi, Junko Negishi, Masao Yamazaki, Tadasu Furusho, Megumi Ichisawa, and Hiroaki Sato
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Sensory evaluation ,Taste ,Multidisciplinary ,Astringent ,Cultivars ,Sensory system ,04 agricultural and veterinary sciences ,Umami ,Biology ,lcsh:Computer applications to medicine. Medical informatics ,Solanum tuberosum ,040401 food science ,Article ,Horticulture ,0404 agricultural biotechnology ,lcsh:R858-859.7 ,Food science ,Cultivar ,lcsh:Science (General) ,Potato ,Tastes ,lcsh:Q1-390 - Abstract
This data article describes a sensory evaluation of potatoes used in food processing from the Tokachi, Kamikawa, and Abashiri geographic areas of Hokkaido, Japan, performed by untrained young adults. We gathered sensory data on potatoes from the four cultivars âToyoshiro,â âKitahime,â âSnowden,â and âPoroshiri.â The sensory evaluation was performed on steamed potatoes from each cultivar; these potatoes were harvested from each of the three geographic areas. Table 1 provides the data from the evaluation of the five basic tastes (sweet, salty, sour, bitter, and umami), as well as the evaluation of the egumi taste, which is a Japanese term indicating a taste that is acrid, astringent, and slightly bitter. Keywords: Potato, Sensory evaluation, Tastes, Cultivars
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- 2017
259. Management of both toughness and stiffness of polypropylene nanocomposites using poly(5-hexen-1-ol-co -propylene) and silica nanospheres
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Hideaki Hagihara, Hiroaki Sato, Ryota Watanabe, Masao Kunioka, and Junji Mizukado
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Polypropylene ,Toughness ,Materials science ,Nanocomposite ,Polymers and Plastics ,Composite number ,Dispersity ,Stiffness ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Elastomer ,01 natural sciences ,0104 chemical sciences ,chemistry.chemical_compound ,chemistry ,medicine ,Composite material ,medicine.symptom ,0210 nano-technology ,Ternary operation - Abstract
We developed novel polypropylene (PP)/silica nanocomposites using PP and silica nanospheres (SNSs) combined with poly(5-hexen-1-ol-co-propylene) (PPOH), which is a functionalized PP containing hydroxyl groups that was assumed to play a role as not only an elastomer but also an interface modifier. Since the affinity between the PP matrix and silica filler was expected to be improved by blending with PPOH, its influence on the mechanical properties, structure, and toughness of the ternary composites was examined in detail to provide a better understanding of the role of the matrix-filler affinity on the mechanical properties. The dispersity of the SNSs in the fabricated PP/PPOH/SNS nanocomposite was improved by increasing the hydroxyl group content of PPOH due to the enhanced affinity between PPOH and the SNSs. The SNSs in the composite with PPOH containing 6.4 mol% hydroxyl groups (PPOH6.4) were almost dispersed in the microscale domain, while the SNSs in the composite with 1.3 mol% hydroxy groups (PPOH1.3) were considerably aggregated. The toughness of the nanocomposite was noticeably improved by blending PPOH6.4 without a significant loss of stiffness. In contrast, the toughness was hardly improved using PPOH1.3. Therefore, both the fine dispersion of the SNSs and the excellent affinity between PPOH6.4 and the SNSs contributed to the good balance of toughness and stiffness of the PP/PPOH/SNS nanocomposite.
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- 2017
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260. Intranasal immunization with inactivated feline calicivirus particles confers robust protection against homologous virus and suppression against heterologous virus in cats
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Kayo Iwamoto, Eiji Oishi, Risa Kainuma, Hiroaki Sato, Nobutaka Okada, Go Sehata, Takuo Sawada, Katsuo Masubuchi, Tatsuki Noda, Tatsuhiko Igarashi, and Taichi Noro
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0301 basic medicine ,040301 veterinary sciences ,Heterologous ,Antibodies, Viral ,Cat Diseases ,Virus ,0403 veterinary science ,03 medical and health sciences ,Immunity ,Virology ,Animals ,Viral shedding ,Neutralizing antibody ,Administration, Intranasal ,Caliciviridae Infections ,Feline calicivirus ,CATS ,biology ,Vaccination ,Viral Vaccines ,04 agricultural and veterinary sciences ,biology.organism_classification ,Antibodies, Neutralizing ,Immunoglobulin A ,030104 developmental biology ,Vaccines, Inactivated ,Immunization ,Cats ,biology.protein ,Calicivirus, Feline - Abstract
The protective efficacy of intranasal (IN) administration of inactivated feline calicivirus (FCV) vaccine against homologous or heterologous FCV infection was investigated. Groups of cats immunized with the experimental inactivated, non-adjuvanted FCV vaccine via either the IN or subcutaneous (SC) route were exposed to homologous or highly heterologous FCV. Both the IN and SC immunization protocols established robust protection against homologous FCV infection. Although neither immunization regimen conferred protection against the heterologous strain, clinical scores and virus titres of oral swabs were lower in cats in the IN group compared to those in the SC group, accompanying a faster neutralizing antibody response against the heterologous virus in cats in the IN group. The IN group secreted more IgA specific to FCV proteins in oral washes (lavage fluids from the oral cavity) than the SC group. IN immunization with an inactivated whole FCV particle, which protects cats from homologous virus exposure and shortens the period of heterologous virus shedding, may serve as a better platform for anti-FCV vaccine.
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- 2017
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261. Glycated albumin level during late pregnancy as a predictive factor for neonatal outcomes of women with diabetes
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Ko Ichihashi, Kohei Nagai, Atsuko Kawano, Hiroaki Sato, and Daisuke Sugawara
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Adult ,Glycation End Products, Advanced ,medicine.medical_specialty ,Pregnancy in Diabetics ,030209 endocrinology & metabolism ,Infant, Newborn, Diseases ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,Glycated albumin ,Japan ,Predictive Value of Tests ,Pregnancy ,Internal medicine ,Diabetes mellitus ,Humans ,Medicine ,Glycated Serum Albumin ,030212 general & internal medicine ,Serum Albumin ,Retrospective Studies ,Glycated Hemoglobin ,business.industry ,Obstetrics ,Infant, Newborn ,Obstetrics and Gynecology ,medicine.disease ,Late pregnancy ,Predictive factor ,Gestational diabetes ,Diabetes, Gestational ,Endocrinology ,ROC Curve ,chemistry ,Neonatal outcomes ,Pediatrics, Perinatology and Child Health ,Female ,Glycated hemoglobin ,business ,Biomarkers - Abstract
To investigate the association between glycated albumin (GA) in diabetic mothers and complications in their children, and to determine GA cutoff values for predicting complications in infants.This hospital-based case-control study involved 71 Japanese diabetic mothers and their children. Mean GA values were compared between mothers of infants with and without complications, and relationship with number of complications was analyzed by Pearson's correlation. Receiver operating characteristic analysis determined GA cutoff values for complications in infants.GA was significantly higher in mothers of children with neonatal hypoglycemia (15.8 ± 3.2 versus 12.6 ± 1.2%, p .001), respiratory disorders (15.7 ± 3.6 versus 12.9 ± 1.9%, p .001), hypocalcemia (15.9 ± 3.7 versus 13.1 ± 1.8%, p .001), polycythemia (15.7 ± 2.3 versus 13.8 ± 2.1%, p =.009), myocardial hypertrophy (16.1 ± 3.7 versus 13.1 ± 2.3%, p .001), and large-for-date status (15.8 ± 2.4 versus 13.7 ± 3.1%, p = .006), showing significant positive correlation with number of complications in infants (r = .704, 95%CI: 0.579-0.797, p .001). Cut-off values were within the limits of 13.6-14.7%.GA is useful for predicting pregnancy outcomes in mothers with diabetes and must be maintained at low levels to prevent complications in infants.
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- 2017
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262. How to choose the best fractional base unit for a high-resolution Kendrick mass defect analysis of polymer ions
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Thierry Fouquet and Hiroaki Sato
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chemistry.chemical_classification ,Kendrick mass ,Resolution (mass spectrometry) ,010401 analytical chemistry ,Organic Chemistry ,Analytical chemistry ,Polymer ,Thermal ionization mass spectrometry ,010402 general chemistry ,Mass spectrometry ,01 natural sciences ,0104 chemical sciences ,Analytical Chemistry ,Ion ,chemistry ,SI base unit ,Spectroscopy - Published
- 2017
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263. Glycemia and the cardioprotective effects of insulin pre-conditioning in the isolated rat heart
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Thomas Schricker, Takashi Matsukawa, Hiroaki Sato, Tadahiko Ishiyama, Takeshi Oguchi, Tamaki Sato, Akiko Kawakami, and Yosuke Nakadate
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Blood Glucose ,Male ,0301 basic medicine ,lcsh:Diseases of the circulatory (Cardiovascular) system ,Phospho-protein kinase B ,Endocrinology, Diabetes and Metabolism ,medicine.medical_treatment ,030204 cardiovascular system & hematology ,Random Allocation ,0302 clinical medicine ,Heart Rate ,Insulin ,Original Investigation ,Heart ,Tumor necrosis factor-α ,Treatment Outcome ,Glycemic index ,Ischemic Preconditioning, Myocardial ,Mannitol ,Isolated rat heart ,Cardiology and Cardiovascular Medicine ,medicine.drug ,medicine.medical_specialty ,Ischemia ,Myocardial Reperfusion Injury ,Stunned myocardium ,Contractility ,03 medical and health sciences ,Organ Culture Techniques ,Insulin-induced cardioprotection ,Internal medicine ,Diabetes mellitus ,Heart rate ,medicine ,Animals ,Rats, Wistar ,Dose-Response Relationship, Drug ,business.industry ,Acute hyperglycemia ,medicine.disease ,Myocardial Contraction ,Rats ,030104 developmental biology ,Endocrinology ,Glycemic Index ,Cardiac contractility ,lcsh:RC666-701 ,Hyperglycemia ,Ischemic preconditioning ,business - Abstract
Background While acute hyperglycemia has been shown to mitigate the beneficial effects of ischemic preconditioning, its effect on insulin-induced preconditioning remains unclear. Methods The study was designed to test the hypothesis that acute hyperglycemia diminishes the cardioprotective effects following a 20-min pre-ischemic pre-conditioning with insulin in the isolated rat heart using the Langendorff system. Forty hearts were assigned to receive modified Krebs–Henseleit (KH) buffer containing 0.5 U/L insulin and 100 mg/dL glucose (InsG100, n = 10), KH buffer with 100 mg/dL glucose (G100, n = 10), KH buffer supplemented with 0.5 U/L insulin and 600 mg/dL glucose (InsG600, n = 10), or with 600 mg/dL glucose (G600, n = 10). To match the osmotic pressure of the InsG600 group, 27.5 mmol/L of mannitol was added to KH solution in the InsG100 and G100 group. The four groups were perfused with each solution for 20 min prior to 15 min of no-flow ischemia, and during 20 min of reperfusion. Only during the ischemic period the heart was paced at 222 beats/min. Measurements of heart rate, coronary flow and maximum of LV derivative of pressure development (dP/dt max) were recorded. Myocardial phospho-protein kinase B (p-Akt) and tumor necrosis factor-α (TNF-α) levels were assayed by enzyme-linked immunosorbent assay and sandwich ELISA, respectively following reperfusion. Results After reperfusion, LV dP/dt max and heart rate in the InsG100 group was significantly higher than that in the other three groups. The myocardial p-Akt level in the InsG100 group was significantly elevated when compared to the InsG600 group at the end of reperfusion. The p-Akt levels in the InsG600 and InsG100 group were significantly higher than in the corresponding non-insulin groups. Conclusions Acute hyperglycemia diminishes the cardioprotective effects of insulin preconditioning in the isolated rat heart, possibly mediated through the suppression of myocardial Akt phosphorylation.
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- 2017
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264. Rapid monitoring of RNA degradation activity in vivo for mammalian cells
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Hidenori Tani, Masaki Torimura, and Hiroaki Sato
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0301 basic medicine ,RNA Stability ,Time Factors ,Fluorophore ,Bioengineering ,Biology ,Applied Microbiology and Biotechnology ,03 medical and health sciences ,chemistry.chemical_compound ,Fluorescence Resonance Energy Transfer ,Humans ,Fluorescent Dyes ,RNA, Double-Stranded ,Quenching (fluorescence) ,Nucleic Acid Hybridization ,RNA ,Molecular biology ,Fluorescence ,RNA silencing ,HEK293 Cells ,030104 developmental biology ,Förster resonance energy transfer ,chemistry ,Molecular Probes ,Biophysics ,Molecular probe ,Biotechnology - Abstract
We have developed a rapid fluorescence assay based on fluorescence resonance energy transfer (FRET) for the monitoring of RNA degradation activity in mammalian cells. In this technique, double-stranded RNA (dsRNA) fluorescent probes are used. The dsRNA fluorescent probes consist of a 5' fluorophore-labeled strand hybridized to a 3' quencher-labeled strand, and the fluorescent dye is quenched by a quencher dye. When the dsRNA is degraded by nascent RNases in cells, the fluorescence emission of the fluorophore is induced following the degradation of the double strands. The degradation rates of the dsRNA are decelerated in response to chemical or environmental toxicity; therefore, in the case of cellular toxicity, the dsRNA is not degraded and remains intact, thus quenching the fluorescence. Unlike in conventional cell-counting assays, this new assay eliminates time-consuming steps, and can be used to simply evaluate the cellular toxicity via a single reaction. Our results demonstrate that this assay can rapidly quantify the RNA degradation rates in vivo within 4 h for three model chemicals. We propose that this assay will be useful for monitoring cellular toxicity in high-throughput applications.
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- 2017
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265. The clinical features and prognosis of mumps-associated hearing loss: a retrospective, multi-institutional investigation in Japan
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Mikio Suzuki, Kotaro Ishikawa, Shinya Morita, Hiroshi Yamashita, Haruo Takahashi, Takaaki Murata, Michihiko Sone, Shin-ichi Usami, Naohito Hato, Ryosuke Kitoh, Yasushi Naito, Atsushi Matsubara, Shin-ya Nishio, Satoshi Fukuda, Tatsuo Matsunaga, Kimitaka Kaga, Hajime Sano, Atsushi Fukuda, Kaoru Ogawa, Tatsuya Yamasoba, Tetsuya Tono, Keishi Fujiwara, Kazunori Nishizaki, Hiroaki Sato, and Tetsuo Ikezono
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Adult ,Male ,medicine.medical_specialty ,Profound sensorineural hearing loss ,Adolescent ,Hearing loss ,medicine.medical_treatment ,Audiology ,Young Adult ,03 medical and health sciences ,0302 clinical medicine ,Japan ,Refractory ,Cochlear implant ,otorhinolaryngologic diseases ,medicine ,Humans ,030212 general & internal medicine ,Young adult ,Child ,Hearing Loss ,030223 otorhinolaryngology ,Glucocorticoids ,Mumps ,Retrospective Studies ,business.industry ,Infant ,Retrospective cohort study ,General Medicine ,Middle Aged ,Prognosis ,Otorhinolaryngology ,Hearing Impaired Persons ,Child, Preschool ,Female ,medicine.symptom ,business - Abstract
The majority of hearing loss due to mumps presents as unilateral profound sensorineural hearing loss, which is refractory to treatment. In rare cases of bilateral total deafness, cochlear implants were beneficial for speech perception. Vaccination against mumps is recommended to prevent mumps-associated hearing loss.The objective of this study is to investigate the clinical characteristics of hearing loss due to mumps and to evaluate hearing outcomes.The clinical parameters were analyzed under a retrospective multi-institutional study design in patients diagnosed with hearing loss due to mumps at the Otolaryngology departments of 19 hospitals between 1987 and 2016.Sixty-seven patients with hearing loss due to mumps were enrolled. The study population consisted of 35 males and 32 females, ranging in age from 1 to 54, with a median age of 9.5 years. Sixty-three patients presented with unilateral, and 4 with bilateral hearing loss. Profound hearing loss was observed in 65 ears. Only one ear with severe hearing loss showed complete recovery. Four patients with bilateral hearing loss received cochlear implant surgery. Most of the patients with hearing loss due to mumps had no history of vaccination.
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- 2017
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266. Epidemiological survey of acute low-tone sensorineural hearing loss
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Testuya Tono, Hiroshi Yamashita, Takashi Nakagawa, Yoshihiro Noguchi, Kimitaka Kaga, Atsushi Matsubara, Satoshi Iwasaki, Kaoru Ogawa, Michihiko Sone, Hajime Sano, Tatsuya Yamasoba, Kazunori Nishizaki, Tatsuo Matsunaga, Naohito Hato, Shin-ichi Usami, Shigeru Kuwashima, Hiroaki Sato, Tetsuo Ikezono, Ryosuke Kitoh, Akira Hara, Yasushi Naito, Hideo Shojaku, Satoshi Fukuda, Kotaro Ishikawa, Takaaki Murata, Haruo Takahashi, and Shin-ya Nishio
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Adult ,Male ,medicine.medical_specialty ,Adolescent ,Hearing Loss, Sensorineural ,Audiology ,Demographic data ,Nationwide survey ,Young Adult ,03 medical and health sciences ,0302 clinical medicine ,Japan ,Epidemiology ,Humans ,Medicine ,Child ,030223 otorhinolaryngology ,Aged ,Aged, 80 and over ,business.industry ,General Medicine ,Middle Aged ,Prognosis ,medicine.disease ,Tone (literature) ,Predictive value ,Otorhinolaryngology ,030220 oncology & carcinogenesis ,Female ,Sensorineural hearing loss ,business - Abstract
Objectives: A nationwide epidemiological survey involving 23 hospitals in Japan was conducted and the predictive values of demographic data were examined statistically. Methods: A total of 642 patients from 23 hospitals, including 20 university hospitals, in Japan were enrolled in the study. Age ranged from 8 to 87 years, and all were diagnosed with acute low-tone sensorineural hearing loss (ALHL) between 1994 and 2016. Demographic data for the patients, such as symptoms, gender, mean age, and distribution of ALHL grading, were collected and analyzed in relation to prognosis using Student’s t-test, χ2 test and logistic regression. Results: Female gender (p?.013), younger age (p?.001), low-grade hearing loss (p?.001), and shorter interval between onset and initial visit (p?.004) were significantly predictive of a good prognosis. The prognosis for definite ALHL was significantly better than that for probable ALHL (p?.007). Conclusions: The severity of initial hearing loss, interval between onset and initial visit and age were important prognostic indicators for ALHL, while female gender was an important prognostic indicator peculiar to ALHL.
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- 2017
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267. Idiopathic sudden sensorineural hearing loss and acute low-tone sensorineural hearing loss: a comparison of the results of a nationwide epidemiological survey in Japan
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Satoshi Iwasaki, Kaoru Ogawa, Kazunori Nishizaki, Tatsuya Yamasoba, Ryosuke Kitoh, Shin-ya Nishio, Hajime Sano, Seiji Kakehata, Yasushi Naito, Michihiko Sone, Satoshi Fukuda, Kimitaka Kaga, Atsushi Matsubara, Haruo Takahashi, Hidehiko Takeda, Kotaro Ishikawa, Takaaki Murata, Tadao Yoshida, Hideo Shojaku, Shin-ichi Usami, Akira Hara, Yoshihiro Noguchi, Sho Kanzaki, Tatsuo Matsunaga, Naohito Hato, Hiroaki Sato, Tetsuo Ikezono, Takashi Nakagawa, Hiroshi Yamashita, Testuya Tono, and Mikio Suzuki
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Adult ,Male ,medicine.medical_specialty ,Adolescent ,Hearing Loss, Sensorineural ,Audiology ,Disease course ,Young Adult ,03 medical and health sciences ,0302 clinical medicine ,Japan ,Epidemiology ,otorhinolaryngologic diseases ,medicine ,Humans ,030223 otorhinolaryngology ,Aged ,Age differences ,business.industry ,General Medicine ,Hearing Loss, Sudden ,Middle Aged ,Prognosis ,medicine.disease ,Tone (literature) ,Otorhinolaryngology ,030220 oncology & carcinogenesis ,Sudden sensorineural hearing loss ,Female ,Sensorineural hearing loss ,business - Abstract
Objectives: The aim of this study was to investigate the differences between idiopathic sudden sensorineural hearing loss (SSNHL), and acute low-tone sensorineural hearing loss (ALHL) using the results of a nationwide survey database in Japan and to analyze the variables associated with their clinical features and the severity of hearing impairment, treatment, and prognosis. Methods: Participants were patients registered between April 2014 and March 2016 in a multicenter epidemiological survey database involving 30 university hospitals and medical centers across Japan. Statistical analysis was performed to clarify the factors associated with their clinical characteristics and the severity of hearing impairment, treatment, and prognosis. Results: Idiopathic SSNHL and ALHL differed significantly in terms of male-to-female ratio, age distribution, and time from onset to start of treatment. The treatment methods and hearing prognosis also differed markedly between the two diseases. A majority (92%) of idiopathic SSNHL patients were administered some type of corticosteroid, while half of the ALHL patients received corticosteroids and a diuretic agent. Conclusion: The results suggested that idiopathic SSNHL and ALHL belonged to different categories of inner ear disease.
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- 2017
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268. Extension of the Kendrick Mass Defect Analysis of Homopolymers to Low Resolution and High Mass Range Mass Spectra Using Fractional Base Units
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Hiroaki Sato and Thierry Fouquet
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Resolution (mass spectrometry) ,Kendrick mass ,010405 organic chemistry ,Electrospray ionization ,010401 analytical chemistry ,Analytical chemistry ,01 natural sciences ,0104 chemical sciences ,Analytical Chemistry ,Matrix-assisted laser desorption/ionization ,chemistry.chemical_compound ,chemistry ,Mass spectrum ,Ion trap ,Low Mass ,Caprolactone - Abstract
Beyond the high resolution/low mass range data traditionally used, a Kendrick mass defect analysis (KMD) using the new concept of fractional base units has been successfully conducted on low resolution/low mass range and high resolution/high mass range data for the first time. Relying on a mathematical framework to rationalize the effect of the fractional base units, the electrospray ionization single stage and multistage mass spectra of a poly(vinylpyrrolidone) recorded from a low resolution ion trap analyzer were turned into information-rich KMD plots using vinylpyrrolidone/112 and pyrrolidone/86 as base units. The distributions detected in the matrix assisted laser desorption ionization spiralTOF mass spectra of high molecular weight poly(ethylene oxide) and poly(caprolactone) were conveniently discriminated in KMD plots using (ethylene oxide)/45 and caprolactone/113 as base units with an unprecedented resolution at such a mass range. The high resolution KMD analysis using fractional base units opens new perspectives for the acquisition, visualization, and presentation of mass spectra of polymers with less restrictions in terms of required resolution and molecular weights.
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- 2017
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269. Experimental analysis of stabilizing effects of carbon nanotubes (CNTs) on thermal oxidation of poly(ethylene glycol)–CNT composites
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Liang Chen, Junji Mizukado, Hiroaki Sato, Shogo Yamane, Kenji Hata, Takeo Yamada, and Seisuke Ata
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Thermal oxidation ,Materials science ,Diffusion ,Intermolecular force ,technology, industry, and agriculture ,General Physics and Astronomy ,macromolecular substances ,02 engineering and technology ,Carbon nanotube ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Mass spectrometry ,01 natural sciences ,0104 chemical sciences ,law.invention ,chemistry.chemical_compound ,chemistry ,Chemical engineering ,law ,Ionization ,Polymer chemistry ,PEG ratio ,Physical and Theoretical Chemistry ,0210 nano-technology ,Ethylene glycol - Abstract
In this work, the thermal stabilization of poly(ethylene glycol) (PEG) by super-growth carbon nanotubes (SGCNTs) is studied by analyzing degraded compounds via high-resolution matrix-assisted laser diffusion ionization time-of-flight mass spectroscopy and IR techniques. SGCNTs successfully suppress the thermal oxidation of PEG, and the components of the degraded compounds change upon addition of SGCNTs to PEG. The SGCNTs quench mainly the RO radical generated by the initial chain scission of the C O bond of PEG, resulting in the suppression of the intermolecular proton abstraction.
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- 2017
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270. A nationwide study on enlargement of the vestibular aqueduct in Japan
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Hiroaki Sato, Yoshihiro Noguchi, Akira Hara, Tetsuji Yokoyama, Kiyofumi Gyo, Makito Okamoto, Kaoru Ogawa, Tatsuya Yamasoba, Kunihiro Fukushima, Tsutomu Nakashima, Shin-ichi Usami, Ken Kitamura, and Satoshi Fukuda
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Male ,Vestibular aqueduct ,Pediatrics ,0302 clinical medicine ,Japan ,Risk Factors ,Interquartile range ,Vertigo ,Craniocerebral Trauma ,Child ,030223 otorhinolaryngology ,biology ,medicine.diagnostic_test ,Respiratory infection ,General Medicine ,Middle Aged ,medicine.anatomical_structure ,Child, Preschool ,030220 oncology & carcinogenesis ,Audiometry, Pure-Tone ,Female ,medicine.symptom ,Goiter, Nodular ,Adult ,medicine.medical_specialty ,Adolescent ,Hearing loss ,Hearing Loss, Sensorineural ,Hearing Loss, Unilateral ,Dizziness ,Vestibular Aqueduct ,Hearing Loss, Bilateral ,Young Adult ,03 medical and health sciences ,otorhinolaryngologic diseases ,medicine ,Humans ,Risk factor ,Aged ,business.industry ,Infant, Newborn ,Infant ,Hearing Loss, Sudden ,biology.organism_classification ,Surgery ,Logistic Models ,Otorhinolaryngology ,Multivariate Analysis ,Etiology ,sense organs ,Audiometry ,business - Abstract
Objective To document the clinical features and associated pure-tone audiometry data in patients with enlargement of the vestibular aqueduct (EVA), and to identify risk factors for fluctuating hearing loss (HL) and vertigo/dizziness in EVA patients. Methods In this nationwide survey in Japan, a first survey sheet was mailed to 662 board-certified otolaryngology departments to identify the ones treating EVA patients. A second survey sheet, which contained solicited clinical information and the results of the hearing tests, was mailed to all facilities that reported treating EVA cases. We analyzed clinical information, including age at the time of the most recent evaluation, gender, EVA side, age at onset, initial symptoms, precipitating factors, and etiology from survey responses, and assessed 4-frequency (500, 1000, 2000, and 4000 Hz) pure-tone average (PTA) from accompanying pure-tone audiometry data. A multivariate logistic regression analysis was utilized to identify the possible risk factors for fluctuating HL and vertigo/dizziness. Results In total, 513 hospitals (response rate, 77.5%) responded to the first survey, and 113 reported treating patients with EVA. Seventy-nine out of the 113 hospitals (response rate 69.9%) responded to the second survey, and the data of 380 EVA patients were registered and analyzed. Of the 380 patients, 221 (58.2%) were female, suggesting female preponderance. The patient age ranged from 0 to 73 years (mean, 16.7 years; median, 13 years; interquartile range, 6–24 years). EVA was bilateral in 91.1% of the patients (346/380). The most prevalent initial symptom was HL (341/380), followed by vertigo/dizziness/imbalance (34/380). Sudden HL occurred secondary to head trauma in 5.3% of the patients and upper respiratory infection in 5.0%. Pure-tone audiometry showed profound HL (PTA >91 dB) in 316 (52.0%) of the 608 ears in the 304 patients tested, and asymmetric HL, defined as >10 dB, in 147 (48.4%) of the 304 patients. The mean PTA was 83.7 dB (median, 91.3 dB; interquartile range, 71.3–103.8 dB), and the severity in PTA did not correlate with age. Multivariate logistic regression identified age ≥10 years (compared to age of 0–9 years), bilateral HL (compared to unilateral HL/normal hearing), a history of head trauma, and Pendred syndrome (compared to the other EVA-associated disorders) as significant risk factors for fluctuating HL and/or vertigo/dizziness. Conclusion The present nationwide survey of 380 EVA patients provided a more precise description of the clinical features, including risk factors for fluctuating HL and vertigo/dizziness.
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- 2017
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271. Expression of cell cycle-related proteins in oropharyngeal squamous cell carcinoma based on human papilloma virus status
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Hiroaki Sato, Ikuro Sato, Kazuto Matsuura, Kazuyuki Ishida, Noriyuki Uesugi, Tamotsu Sugai, Koudai Tsuchida, and Kiyoto Shiga
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Adult ,Male ,0301 basic medicine ,Cancer Research ,Cell Cycle Proteins ,Cyclin A ,Biology ,medicine.disease_cause ,Retinoblastoma Protein ,law.invention ,03 medical and health sciences ,0302 clinical medicine ,law ,Biomarkers, Tumor ,medicine ,Humans ,Papillomaviridae ,S-Phase Kinase-Associated Proteins ,In Situ Hybridization ,Polymerase chain reaction ,Aged ,Aged, 80 and over ,Oncogene ,Papillomavirus Infections ,HPV infection ,virus diseases ,Cancer ,General Medicine ,Middle Aged ,Cell cycle ,medicine.disease ,Molecular medicine ,female genital diseases and pregnancy complications ,Gene Expression Regulation, Neoplastic ,Oropharyngeal Neoplasms ,030104 developmental biology ,p21-Activated Kinases ,Oncology ,030220 oncology & carcinogenesis ,Carcinoma, Squamous Cell ,Cancer research ,Female ,Tumor Suppressor Protein p53 ,Carcinogenesis ,Immunostaining - Abstract
The molecular association between human papilloma virus (HPV) and cell cycle-related (CCR) proteins is not fully understood in oropharyngeal squamous cell carcinoma (OPSCC). Herein, we examined the expression levels of CCRs in OPSCCs based on HPV status. In situ hybridization (ISH)- and polymerase chain reaction (PCR)-based assays were used to detect HPV status in 98 OPSCCs, and CCRs were detected by immunostaining. Of 98 tumors, 47 had HPV-positive tumors by either ISH- or PCR-based assays. Concordance analysis between ISH- and PCR-based tests showed a good agreement in OPSCC. Expression of p16 was moderate, consistent with HPV positivity as determined by ISH-based analysis. High p53-, phospho (p)-Rb-, SKP2-, cyclin D1-, and p-c-myc-positive rates were correlated with HPV-negative tumors, whereas high p16- and p27-positive rates were associated with HPV-positive tumors. The positive rates for p21 and cyclin A did not differ between HPV-positive and HPV-negative tumors. Finally, Ki-67 positivity was commonly observed for both types of OPSCCs. Although expression of p16 is thought to be a marker of HPV infection, ISH- or PCR-based tests should be used for HPV detection. In addition, our results regarding CCRs may be helpful for understanding the carcinogenesis of OPSCC.
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- 2017
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272. Development of Frankfurter Sausage Manufacturing Using Emu Meat
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Yozo Nakazawa, Naonori Saka, Hiroaki Sato, and Masao Yamazaki
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Economics ,Food science ,Food Science - Published
- 2017
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273. A transport protocol for millimeter-wave links
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Hiroaki Sato and Masaki Bandai
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Computer science ,Extremely high frequency ,Electronic engineering ,Protocol (object-oriented programming) - Published
- 2017
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274. Polymer Characterization for Supporting the Polymer Supply Chain
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Hiroaki Sato
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chemistry.chemical_classification ,Materials science ,chemistry ,Chemical engineering ,Polymer characterization ,Supply chain ,010401 analytical chemistry ,02 engineering and technology ,Polymer ,021001 nanoscience & nanotechnology ,0210 nano-technology ,01 natural sciences ,0104 chemical sciences - Published
- 2017
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275. Relationships among drinking and smoking habits, history of diseases, body mass index and idiopathic sudden sensorineural hearing loss in Japanese patients
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Yoshihiro Noguchi, Shin-ya Nishio, Gen Kobashi, Tetsuya Tono, Hiroaki Sato, Tetsuo Ikezono, Hideo Shojaku, Seiji Kakehata, Naohito Hato, Kazunori Nishizaki, Michihiko Sone, Akira Hara, Kotaro Ishikawa, Atsushi Matsubara, Ryoshuke Kitoh, Takaaki Murata, Haruo Takahashi, Hidehiko Takeda, Kaoru Ogawa, Tatsuya Yamasoba, Yasushi Naito, Tatsuo Matsunaga, Kimitaka Kaga, Mitsumasa Umesawa, Satoshi Iwasaki, Satoshi Fukuda, Hajime Sano, Shin-ichi Usami, Takashi Nakagawa, Mikio Suzuki, and Hiroshi Yamashita
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Adult ,Male ,Pediatrics ,medicine.medical_specialty ,Alcohol Drinking ,Cross-sectional study ,Smoking habit ,Hearing Loss, Sensorineural ,Cardiovascular risk factors ,Body Mass Index ,03 medical and health sciences ,Young Adult ,0302 clinical medicine ,Japan ,Epidemiology ,otorhinolaryngologic diseases ,medicine ,Humans ,030223 otorhinolaryngology ,Aged ,Aged, 80 and over ,business.industry ,Smoking ,General Medicine ,Hearing Loss, Sudden ,Middle Aged ,Cross-Sectional Studies ,Otorhinolaryngology ,Multicenter study ,Cardiovascular Diseases ,030220 oncology & carcinogenesis ,Sudden sensorineural hearing loss ,Physical therapy ,Female ,business ,Body mass index - Abstract
Objectives: To present the cardiovascular risk factors in idiopathic sudden sensorineural hearing loss (SSNHL) patients enrolled in a nationwide epidemiological survey of hearing disorders in Japan. Materials and methods: We compiled the cardiovascular risk factors in 3073 idiopathic SSNHL subjects (1621 men and 1452 women) and compared their proportions with controls as part of the National Health and Nutrition Survey in Japan, 2014. The cardiovascular risk factors consisted of drinking and smoking habits, a history of five conditions related to cardiovascular disease and body mass index. Results: The proportion of current smokers was significantly higher among men aged 50?59, 60?69 and 70+ and among women aged 30?39, 40?49 and 60?69. The proportion of patients with a history of diabetes mellitus was significantly higher among men aged 50?59, 60?69 and 70+, but not in women. In addition, male and female SSNHL subjects aged 60?69 showed lower proportions of current drinking; and female SSNHL subjects aged 60?69 showed higher proportions of overweight (BMI ?25?kg/m2). Conclusions: The present cross-sectional study revealed showed significantly higher proportions of current smokers among both men and women as well as those with a history of diabetes mellitus among men across many age groups in patients with idiopathic SSNHL compared with the controls.
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- 2017
276. Strengthening the Stroke Team to shorten Therapeutic Time for Acute Ischemic Stroke
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Shinya Fukuta, Mitsuhiro Iwasaki, Hiroaki Sato, Akihiro Nemoto, Takanori Suzuki, Masafumi Morimoto, and Chiyoe Hikita
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medicine.medical_specialty ,business.industry ,Stroke team ,030204 cardiovascular system & hematology ,03 medical and health sciences ,0302 clinical medicine ,Emergency medicine ,medicine ,Physical therapy ,Surgery ,Neurology (clinical) ,business ,Acute ischemic stroke ,030217 neurology & neurosurgery - Published
- 2017
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277. The effect of initial treatment on hearing prognosis in idiopathic sudden sensorineural hearing loss : a nationwide survey in Japan
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Kimitaka Kaga, Satoshi Fukuda, Kotaro Ishikawa, Atsushi Matsubara, Shin-ichi Usami, Takaaki Murata, Haruo Takahashi, Hiroaki Sato, Tetsuo Ikezono, Shin-ya Nishio, Sho Kanzaki, Masahiro Okada, Kaoru Ogawa, Tetsuya Tono, Kazunori Nishizaki, Hidehiko Takeda, Tatsuya Yamasoba, Hajime Sano, Naohito Hato, Mikio Suzuki, Hideo Shojaku, Seiji Kakehata, Michihiko Sone, Ryosuke Kitoh, Yasushi Naito, Takashi Nakagawa, Tatsuo Matsunaga, Hiroshi Yamashita, Satoshi Iwasaki, Akira Hara, and Yoshihiro Noguchi
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Adult ,Male ,medicine.medical_specialty ,Hearing Loss, Sensorineural ,Audiology ,Nationwide survey ,03 medical and health sciences ,0302 clinical medicine ,Japan ,Adrenal Cortex Hormones ,Surveys and Questionnaires ,otorhinolaryngologic diseases ,Initial treatment ,Medicine ,Humans ,030223 otorhinolaryngology ,Aged ,business.industry ,General Medicine ,Hearing Loss, Sudden ,Middle Aged ,Prognosis ,Otorhinolaryngology ,030220 oncology & carcinogenesis ,Sudden sensorineural hearing loss ,Prostaglandins ,Female ,business - Abstract
Objectives: To investigate the hearing prognosis of idiopathic sudden sensorineural hearing loss (SSNHL) treated with different initial therapies. Methods: Subjects consisted of patients diagnosed with idiopathic SSNHL within 7 days from onset and showing severe hearing loss (?60?dB), who were registered in a Japanese multicenter database between April 2014 and March 2016. Subjects were divided into four groups according to initial therapy: (1) steroids, (2) steroids?+?Prostaglandins (PGs), (3) intratympanic steroids (ITS), and (4) no steroids. Hearing outcomes were compared among the groups. Results: In total, 1305 patients were enrolled. The final hearing level and hearing gain of patients treated with steroids?+?PGs were significantly higher than those of patients treated with steroids alone or no steroids. The ratio of good prognosis (complete recovery or marked improvement) in patients treated with steroids?+?PGs was higher than that in patients treated with steroids alone or no steroids. There was no difference in the prognosis of patients treated with steroids alone or no steroids. Conclusion: A large number of patients with idiopathic SSNHL were registered in a multicenter database. PG use in combination with steroid administration was associated with a good hearing prognosis in patients with severe hearing loss.
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- 2017
278. Edited by Chi-hung Clarence Ng, Robert Fox, and Michiko Nakano, Reforming Learning and Teaching in Asia-Pacific Universities: Influences of Globalised Processes in Japan, Hong Kong and Australia
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Hiroaki Sato
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Asia pacific ,Political science ,Economic history - Published
- 2018
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279. Neutron Transmission Measurement and Simulation of Ta-181 for Neutron Resonance Thermometry
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Kaoru Y. Hara, Tetsuya Kai, Takashi Kamiyama, Minoru Asako, and Hiroaki Sato
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Nuclear reaction ,Materials science ,010308 nuclear & particles physics ,Neutron emission ,Astrophysics::High Energy Astrophysical Phenomena ,Nuclear Theory ,0211 other engineering and technologies ,Nuclear data ,02 engineering and technology ,Neutron radiation ,01 natural sciences ,Neutron temperature ,Nuclear physics ,Beamline ,0103 physical sciences ,Neutron detection ,Neutron ,021108 energy ,Nuclear Experiment - Abstract
Tantalum-181 is a typically used nucleus for neutron resonance thermometry. To develop an imaging technique of neutron resonance thermometry, the neutron transmission spectrum for a tantalum foil which was set up in a constant-temperature furnace was measured by the time-of-flight (TOF) method. The thickness of the tantalum sample was 30 or 300 μm. Several temperature conditions were set from 20 to 500°C. A gas electron multiplier (GEM) neutron detector was used. The measurements were performed on the 10th beam line (BL10) of the Material and Life science experimental Facility (MLF) at the Japan Proton Accelerator Research Complex (J-PARC). To cut-off neutrons below thermal neutron energy, a cadmium filter was inserted on the neutron beam line. The measured neutron transmission spectrum in the eV energy region was compared to the calculated one with the PHITS code. In the calculation, the time distribution of neutron emission from a source was defined as the pulse function of BL10. The distance from the source to a tally was 14.5 m. The evaluated nuclear data of ENDF/B-VIII.0 or JENDL-4.0 were utilized for each calculation with respect to the neutron-induced nuclear reactions of Ta-181. The differences in the calculated neutron transmission spectra due to the evaluated nuclear data are discussed based on the measured spectra.
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- 2019
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280. Photoimmunotherapy for cancer-associated fibroblasts targeting fibroblast activation protein in human esophageal squamous cell carcinoma
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Hiroshi Tazawa, Toshiyoshi Fujiwara, Shinichi Urano, Shunsuke Kagawa, Takuya Kato, Yasuhiro Shirakawa, Kazuhiro Noma, Hiroaki Sato, Shinichiro Watanabe, Toshiaki Ohara, Hajime Kashima, Yuuri Hashimoto, Ryoichi Katsube, and Hisataka Kobayashi
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0301 basic medicine ,Cancer Research ,Cell Survival ,medicine.disease_cause ,Metastasis ,Mice ,03 medical and health sciences ,0302 clinical medicine ,Cancer-Associated Fibroblasts ,Fibroblast activation protein, alpha ,Cell Line, Tumor ,Endopeptidases ,Tumor Microenvironment ,Animals ,Humans ,Medicine ,Pharmacology ,Tumor microenvironment ,Photosensitizing Agents ,business.industry ,Serine Endopeptidases ,Membrane Proteins ,Photoimmunotherapy ,Phototherapy ,Esophageal cancer ,medicine.disease ,Xenograft Model Antitumor Assays ,030104 developmental biology ,Oncology ,Gelatinases ,Tumor progression ,030220 oncology & carcinogenesis ,Disease Progression ,Cancer research ,Molecular Medicine ,Esophageal Squamous Cell Carcinoma ,Immunotherapy ,business ,Carcinogenesis ,Research Paper - Abstract
Cancer-associated fibroblasts (CAFs) are strongly implicated in tumor progression, including in the processes of tumorigenesis, invasion, and metastasis. The targeting of CAFs using various therapeutic approaches is a novel treatment strategy; however, the efficacy of such therapies remains limited. Recently, near-infrared photoimmunotherapy (NIR-PIT), which is a novel targeted therapy employing a cell-specific mAb conjugated to a photosensitizer, has been introduced as a new type of phototherapy. In this study, we have developed a novel NIR-PIT technique to target CAFs, by focusing on fibroblast activation protein (FAP), and we evaluate the treatment efficacy in vitro and in vivo. Esophageal carcinoma cells exhibited enhanced activation of fibroblasts, with FAP over-expressed in the cytoplasm and on the cell surface. FAP-IR700-mediated PIT showed induced rapid cell death specifically for those cells in vitro and in vivo, without adverse effects. This novel therapy for CAFs, designed as local control phototherapy, was safe and showed a promising inhibitory effect on FAP(+) CAFs. PIT targeting CAFs via the specific marker FAP may be a therapeutic option for CAFs in the tumor microenvironment in the future.
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- 2019
281. Comparison of methemoglobin levels in food protein-induced enterocolitis syndrome and other gastrointestinal diseases in neonates
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Hiroaki Sato, Asami Maruyama, Daisuke Sugawara, Yohei Sugiyama, Misa Matsuura, Atsuko Kawano, Sae Kuroda, Kae Itabashi, Ko Ichihashi, and Eishi Makita
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Pulmonary and Respiratory Medicine ,Male ,medicine.medical_specialty ,Birth weight ,Immunology ,Methemoglobinemia ,Gastroenterology ,Risk Assessment ,Severity of Illness Index ,03 medical and health sciences ,0302 clinical medicine ,Food allergy ,Predictive Value of Tests ,Internal medicine ,Intensive Care Units, Neonatal ,medicine ,Immunology and Allergy ,Humans ,Age of Onset ,Methemoglobin ,Retrospective Studies ,Enterocolitis ,business.industry ,Area under the curve ,Infant, Newborn ,Gestational age ,Infant ,General Medicine ,Venous blood ,Syndrome ,medicine.disease ,Food protein-induced enterocolitis syndrome ,030228 respiratory system ,Feasibility Studies ,Female ,Dietary Proteins ,medicine.symptom ,business ,Biomarkers ,Food Hypersensitivity ,030215 immunology - Abstract
Introduction and objectives Methemoglobinemia has been reported to be associated with severe food protein-induced enterocolitis syndrome (FPIES). However, no reports have evaluated methemoglobin (MHb) levels in FPIES without symptomatic methemoglobinemia or the usefulness of MHb measurement for the diagnostic prediction of FPIES. To evaluate the MHb levels of patients with neonatal-onset FPIES and determine whether MHb levels are higher in FPIES than in other gastrointestinal diseases. Patients and methods Eleven neonates with severe acute FPIES (FPIES group) and 139 neonates with other gastrointestinal diseases (non-FPIES group) were included in this study. Patient characteristics, symptoms, and venous blood test values (MHb, pH, HCO3−, and C-reactive protein) were evaluated. Results The median age at onset was 16 days vs. 1 day; males comprised 64% vs. 46%, the median gestational age was 38 weeks vs. 38 weeks, the median birth weight was 2710 g vs. 2880 g, and the median hospitalization duration was 31 days vs. 6 days for the FPIES vs. non-FPIES groups, respectively. MHb (%) was higher in the FPIES group than in the non-FPIES group [median (range), 1.1 (0.6–10.9) and 0.6 (0.3–1.2), respectively, p 0.05). In the receiver operating characteristic analysis for FPIES diagnosis based on MHb (%), the area under the curve was 0.885, specificity was 97.1%, and sensitivity was 72.7% at a MHb cutoff of 1.0. Conclusion High MHb levels may help diagnose severe acute FPIES in neonates, but careful evaluation is needed.
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- 2019
282. Impact of Stellar Superflares on Planetary Habitability
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Ryusuke Kuroki, Vladimir Airapetian, Yosuke Yamashiki, keiya murashima, Cassandra Ling, Yuta Notsu, Kazunari Shibata, Fuka Takagi, Hiroaki Sato, Subaru Nashimoto, Hina Bando, Daisaku Nogami, Shota Notsu, Takanori Sasaki, Hiroyuki Maehara, Tatsuhiko Sato, Thomas Bligh Scott, and Kosuke Namekata
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010504 meteorology & atmospheric sciences ,FOS: Physical sciences ,Astrophysics ,01 natural sciences ,law.invention ,law ,Planet ,0103 physical sciences ,Astrophysics::Solar and Stellar Astrophysics ,010303 astronomy & astrophysics ,Solar and Stellar Astrophysics (astro-ph.SR) ,0105 earth and related environmental sciences ,Earth and Planetary Astrophysics (astro-ph.EP) ,Physics ,Planetary surface ,Atmospheric escape ,Planetary habitability ,Starspot ,Astronomy and Astrophysics ,Exoplanet ,Astrophysics - Solar and Stellar Astrophysics ,Space and Planetary Science ,Astrophysics::Earth and Planetary Astrophysics ,Astrophysics - Earth and Planetary Astrophysics ,Flare ,Superflare - Abstract
High-energy radiation caused by exoplanetary space weather events from planet-hosting stars can play a crucial role in conditions promoting or destroying habitability in addition to the conventional factors. In this paper, we present the first quantitative impact evaluation system of stellar flares on the habitability factors with an emphasis on the impact of Stellar Proton Events. We derive the maximum flare energy from stellar starspot sizes and examine the impacts of flare associated ionizing radiation on CO$_2$, H$_2$, N$_2$+O$_2$ --rich atmospheres of a number of well-characterized terrestrial type exoplanets. Our simulations based on the Particle and Heavy Ion Transport code System [PHITS] suggest that the estimated ground level dose for each planet in the case of terrestrial-level atmospheric pressure (1 bar) for each exoplanet does not exceed the critical dose for complex (multi-cellular) life to persist, even for the planetary surface of Proxima Centauri b, Ross-128 b and TRAPPIST-1 e. However, when we take into account the effects of the possible maximum flares from those host stars, the estimated dose reaches fatal levels at the terrestrial lowest atmospheric depth on TRAPPIST-1 e and Ross-128 b. Large fluxes of coronal XUV radiation from active stars induces high atmospheric escape rates from close-in exoplanets suggesting that the atmospheric depth can be substantially smaller than that on the Earth. In a scenario with the atmospheric thickness of 1/10 of Earth's, the radiation dose from close-in planets including Proxima Centauri b and TRAPPIST-1 e reach near fatal dose levels with annual frequency of flare occurrence from their hoststars., 37 pages, 19 figures, 4 tables. Accepted for publication in The Astrophysical Journal (on June 16, 2019), Version 2 (fixed typo)
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- 2019
283. Molecular characterization of polyethylene oxide based oligomers by surface-assisted laser desorption/ionization mass spectrometry using a through-hole alumina membrane as active substrate
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Masahiro Kotani, Hiroaki Sato, Takayuki Ohmura, Yasuhide Naito, Thierry Fouquet, and Sayaka Nakamura
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Surface-assisted laser desorption/ionization ,Chemistry ,010401 analytical chemistry ,Organic Chemistry ,Analytical chemistry ,Mass spectrometry ,01 natural sciences ,Dissociation (chemistry) ,0104 chemical sciences ,Analytical Chemistry ,Ion ,Membrane ,Fragmentation (mass spectrometry) ,Desorption ,Mass spectrum ,Spectroscopy - Abstract
RATIONALE Molecular characterization of industrial oligomeric products is performed using surface-assisted laser desorption/ionization mass spectrometry (SALDI-MS), termed desorption ionization using a through-hole alumina membrane (DIUTHAME). This paper describes the unique feature of a DIUTHAME chip applying active SALDI, which generates specific types of fragments of polyglycol samples. METHODS Polyethylene oxide (PEO) and PEO-based materials were subjected to SALDI-MS. The influence of the presence or absence of a cationization salt on the mass spectrum was investigated. The resulting mass spectra composed of fragment ions were compared with those obtained by collision-induced dissociation (CID)-MS/MS. The specific fragment ions generated using the DIUTHAME chip were further subjected to high-energy CID-MS/MS. RESULTS The addition of a cationization salt resulted in SALDI mass spectra with fewer fragment peaks. The mass spectra obtained without adding the cationization salt were composed of many more fragment ions caused by in-source decay. The fragmentation pattern was similar to that seen with low-energy CID. The resulting fragment ions were formed by selective cleavage at the C-O bond. High-energy CID-MS/MS can be performed for the specific fragment ions generated by in-source decay fragmentation. CONCLUSIONS Molecular characterization of PEO-based oligomers by SALDI-MS using the DIUTHAME chip was successfully demonstrated. The selective fragmentation and high-energy CID-MS/MS of the in-source decay fragments made it possible to provide more detailed structural information. This unique feature of DIUTHAME gives it potential for use in new molecular characterization techniques.
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- 2019
284. MicroRNA biomarkers for chemical hazard screening identified by RNA deep sequencing analysis in mouse embryonic stem cells
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Tetsuya Nakazato, Hidenori Tani, Hiroaki Sato, Hiroshi Aoki, Masaki Torimura, and Kaoru Nakamura
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0301 basic medicine ,RNA-Seq ,Computational biology ,Biology ,Toxicology ,Deep sequencing ,Hazardous Substances ,03 medical and health sciences ,Mice ,0302 clinical medicine ,microRNA ,Toxicity Tests ,Animals ,Gene ,Embryonic Stem Cells ,Pharmacology ,Molecular Structure ,Chemical toxicity ,Sequence Analysis, RNA ,RNA ,Embryonic stem cell ,MicroRNAs ,030104 developmental biology ,030220 oncology & carcinogenesis ,Biomarkers ,Potential toxicity - Abstract
We investigated the responses of microRNAs (miRNAs) using mouse embryonic stem cells (mESCs) exposed to nine chemicals (bis(2-ethylhexyl)phthalate, p-cresol, p-dichlorobenzene, phenol, pyrocatecol, chloroform, tri-n-butyl phosphate, trichloroethylene, and benzene), which are listed as "Class I Designated Chemical Substances" from the Japan Pollutant Release and Transfer Register. Using deep sequencing analysis (RNA-seq), several miRNAs were identified that show a substantial response to general chemical toxicity (i.e., to these nine chemicals considered as a group) and several miRNA biomarkers that show a substantial and specific response to benzene. The functions of the identified miRNAs were investigated in accordance with Gene Ontology terms of their predicted target genes, indicating regulation of cellular processes. We compared the results with those for the long non-coding RNAs (ncRNAs) and mRNAs reported in our previous studies in addition to previously identified miRNAs that are either up- or down-regulated in response to the benzene as stimuli. We also observed that the changes in expression of miRNAs were smaller than those for long ncRNAs and mRNAs. Taken together the current and previous results revealed that toxic chemical stimuli regulate the expression of miRNAs. We believe that the use of miRNAs, including the thus identified miRNAs, as biomarkers contribute to predicting the potential toxicity of particular chemicals or identifying human individuals that have been exposed to chemical hazards.
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- 2019
285. Real divisors and pseudo-continuous enhancement of resolution for a Kendrick mass defect analysis
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Thierry Fouquet, Hiroaki Sato, Robert B. Cody, and Sayaka Nakamura
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Kendrick mass ,Chemistry ,Organic Chemistry ,Resolution (electron density) ,Spectroscopy ,Analytical Chemistry ,Computational physics - Published
- 2019
286. Oral mucosa pressure caused by mandibular implant overdenture with different types of attachments
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Kyoko Takafuji, Taro Nomura, Hiroaki Sato, Hisatomo Kondo, Hidemichi Kihara, Takuya Kobayashi, and Norimasa Tanabe
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Molar ,0206 medical engineering ,02 engineering and technology ,Mandible ,Mandibular first molar ,03 medical and health sciences ,0302 clinical medicine ,stomatognathic system ,medicine ,Premolar ,Dentistry (miscellaneous) ,Oral mucosa ,Mastication ,Orthodontics ,Dental Implants ,Universal testing machine ,business.industry ,Mouth Mucosa ,030206 dentistry ,Buccal administration ,Denture, Overlay ,020601 biomedical engineering ,Denture Retention ,stomatognathic diseases ,medicine.anatomical_structure ,Implant ,Dental Prosthesis, Implant-Supported ,Oral Surgery ,business - Abstract
Purpose To determine the appropriate attachment and design of a denture base for mandibular implant overdenture (IOD), the oral mucosa pressure caused by mandibular implant overdentures was measured using edentulous jaw models with various attachments. Methods An experimental edentulous mandibular model with a 1.5-mm thick artificial oral mucosa was used. Two implants were placed at the area equivalent to the bilateral canines of an experimental jaw model. Locator attachments (LA), ball attachments (BA), magnetic attachments (MA), and round-bar attachments (R-BA) were fabricated. Six miniature pressure sensors were placed at the bilateral buccal premolar regions, bilateral buccal shelves, and bilateral lingual molar regions. A precision universal testing machine was used to apply dynamic repetitive loads of 50 N. The load points were the center of the model, which should represent bilateral mastication on both sides (bilateral load), and were equivalent to the left first molar, which should represent unilateral mastication (unilateral load). Statistical analysis was performed using one-way analysis of variance. Multiple comparisons were then performed using the Bonferroni post hoc test. P Results Under the bilateral load condition, the lower oral mucosa pressure value with BA was measured, compared to other attachments at all measurement sites. Under the unilateral load condition, the oral mucosa pressure value of BA was smaller than the other attachments at the measurement site on the loading side. Conclusions BA has exerted the greatest effects on support and bracing, suggesting that, BA is suitable for reducing oral mucosa pressure during mastication.
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- 2019
287. Detectability of minute temporal bone structures with ultra-high resolution CT
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Shigeru Ehara, Kunihiro Yoshioka, Harukazu Hiraumi, Makiko Obara, and Hiroaki Sato
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Ear, Middle ,Stapedius muscle ,Tendons ,03 medical and health sciences ,0302 clinical medicine ,Temporal bone ,Multidetector Computed Tomography ,medicine ,Humans ,030223 otorhinolaryngology ,Image resolution ,Stapes ,Ear Ossicles ,business.industry ,Temporal Bone ,Malleus ,General Medicine ,Stapedius ,Cone-Beam Computed Tomography ,Geniculate Ganglion ,Healthy Volunteers ,Tendon ,medicine.anatomical_structure ,Otorhinolaryngology ,030220 oncology & carcinogenesis ,Ear, Inner ,Ligament ,Imaging technology ,Surgery ,Chorda Tympani Nerve ,Nuclear medicine ,business ,Tomography, X-Ray Computed - Abstract
Objective Computed tomography (CT) is the imaging tool of choice in the diagnosis of temporal bone lesions. With the recent progress in imaging technology, CT with higher spatial resolution (Ultra-high resolution CT) has become available in the clinical setting. The purpose of this study is to evaluate the visibility of small temporal bone structures using ultra-high resolution CT. Material and methods The visibility of 27 minute temporal bone structures on ultra-high resolution CT images was evaluated. Non-helical axial scans were performed in 18 normal hearing ears without previous otologic diseases. Visibility was scored by an experienced radiologist and otologist. Results Minute temporal bone structures including the ossicular chain, the crus of the stapes, the greater superficial petrosal nerve, and the anterior malleolar ligament were clearly visualized on ultra-high resolution CT. The stapedius muscle tendon and the chorda tympani exiting the posterior canaliculus and coursing medial to the malleus could be visualized. Conclusion Ultra-high resolution CT provides good visualization of small temporal bone structures in normal subjects.
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- 2019
288. Risk factors for recurrence after coil embolization for internal carotid artery-posterior communicating artery aneurysms
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Hidekazu Yamazaki, Hidenori Oishi, Shinya Fukuta, Yasufumi Inaka, Hiroaki Sato, Chiyoe Hikita, Masafumi Morimoto, Masahiro Maeda, and Mitsuhiro Iwasaki
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medicine.medical_specialty ,Communicating Artery ,medicine.medical_treatment ,lcsh:Surgery ,lcsh:RC346-429 ,030218 nuclear medicine & medical imaging ,03 medical and health sciences ,0302 clinical medicine ,Aneurysm ,Recurrence ,medicine.artery ,medicine ,Embolization ,Posterior communicating artery ,Risk factor ,lcsh:Neurology. Diseases of the nervous system ,Coil embolization ,business.industry ,lcsh:RD1-811 ,Odds ratio ,medicine.disease ,Internal carotid artery-posterior communicating artery aneurysms ,Surgery ,Neurology (clinical) ,Radiology ,Internal carotid artery ,business ,030217 neurology & neurosurgery - Abstract
Background Use of coil embolization for internal carotid artery-posterior communicating artery aneurysms (IC-PC ANs) has been increasing. However, the recurrence rate after embolization is rather high compared to that after surgery. The aim of this study was to evaluate the factors related to recurrence after coil embolization for IC-PC ANs. Methods A total of 69 patients with IC-PC ANs treated with coil embolization between 2013 and 2019 were retrospectively enrolled, and we evaluated whether the aneurysms recurred after embolization. The patients were divided into two groups (no-recurrence group and recurrence group), and the relationships of several patient or aneurysm characteristics and treatment-related information with aneurysm recurrence were examined. Results Twenty patients (29%) developed aneurysm recurrence. There were significant differences in dome size (5.19 mm/6.48 mm, p = 0.01), neck width (3.25 mm/4.23 mm p = 0.009), aneurysm volume (47.5 mm3/120 mm3, p = 0.003), and Pcom diameter (1.11 mm/1.96 mm p = 0.005) between the two groups. Pcom diameter was the independent risk factor for recurrence (odds ratio: 3.52, 95%CI 1.43–8.69, p = 0.006). The cutoff for Pcom diameter as the factor related to recurrence was 1.79 mm, with sensitivity of 60% and specificity of 83.7%. Conclusion In this study, dome size, neck width, aneurysm volume, and Pcom diameter were associated with recurrence after coil embolization for IC-PC ANs. In particular, Pcom diameter could be an independent risk factor for recurrence.
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- 2021
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289. Consideration of methods for extracting and sharing ideas and tips focusing on 'what is going well' in the railway field
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Hiroaki Sato, Michihiro Shimada, Jun Sakaniwa, Kazumasa Oyama, Masato Kuratani, Shiho Harai, and Ken Kusukami
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Field (physics) ,Computer science ,Construction engineering - Published
- 2021
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290. Extraction and systematization of ideas and tips of railway drivers using behavior observation method
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Jun Sakaniwa, Mami Numata, Yuki Kaneko, Masato Kuratani, Ken Kusukami, Hiroaki Sato, Kazumasa Oyama, and Ryota Kubo
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Engineering drawing ,Computer science ,Extraction (chemistry) ,Observation method - Published
- 2021
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291. Determination of the Block Sequence of Linear Triblock Copolyethers Using Thermal Desorption/Pyrolysis Direct Analysis in Real-Time Mass Spectrometry.
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Shogo Yamane, Sayaka Nakamura, Ryota Inoue, Fouquet, Thierry N. J., Takaya Satoh, Kazumasa Kinoshita, and Hiroaki Sato
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- 2021
- Full Text
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292. Butane detection after long-term treatment of burns in two autopsy cases
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Kosho Yoshida, Kentaro Kasai, Hiroaki Sato, and Toshiko Tanaka
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Adult ,Male ,medicine.medical_specialty ,Time Factors ,Long term treatment ,Adipose tissue ,Autopsy ,Subcutaneous fat ,Pathology and Forensic Medicine ,chemistry.chemical_compound ,Fatal Outcome ,Edema ,medicine ,Humans ,Cerebral Cortex ,business.industry ,Butane ,Forensic Medicine ,Middle Aged ,Surgery ,Facial skin ,Issues, ethics and legal aspects ,Adipose Tissue ,chemistry ,Butanes ,Female ,Tissue Preservation ,Subcutaneous adipose tissue ,medicine.symptom ,Burns ,business - Abstract
A man and a woman were rescued from a room that had exploded. Many empty cassette gas cylinders were found in the room. The man and woman were hospitalized immediately for the treatment of burns. The woman died 6 days later, and the man died 31 days later without regaining consciousness. Carbonization and hardening of the frontal facial skin and parts of the left and right fingers were observed on the man's body. In both cases, systemic burns had led to progressive systemic edema and markedly suppressed circulation. Analytical samples for butanes obtained from their bodies at autopsy were stored at −20 °C for 14 and 25 days, respectively, before analysis. Normal butane and isobutane were quantified in the brain and subcutaneous adipose tissue of the woman. Only the isobutane was quantified in the adipose tissue of the man. The evidence suggests that the man lit a cigarette while breathing gas and the entire room exploded. Our results also suggest that butane can be detected in the adipose tissue of autopsy cases long after inhalation even under the present storage conditions, and isobutane may remain in adipose tissue longer than n-butane.
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- 2021
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293. Efficacy of DRIVEN-FLOW® M7-II, a new on-site drug screening kit in postmortem urine compared with Triage DOA®
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Shiomi Yoshizumi, Hiroaki Sato, Kosho Yoshida, Toshiko Tanaka, and Kentaro Kasai
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medicine.drug_class ,Tricyclic antidepressant ,Urine ,Antidepressive Agents, Tricyclic ,Sensitivity and Specificity ,01 natural sciences ,Pathology and Forensic Medicine ,Benzodiazepines ,03 medical and health sciences ,0302 clinical medicine ,medicine ,Humans ,False Positive Reactions ,030216 legal & forensic medicine ,Mass screening ,Benzodiazepine ,business.industry ,010401 analytical chemistry ,Azepines ,Carbamazepine ,Forensic Medicine ,Triazoles ,Triage ,0104 chemical sciences ,Substance Abuse Detection ,Amphetamine ,Issues, ethics and legal aspects ,Anesthesia ,Quetiapine ,Autopsy ,Reagent Kits, Diagnostic ,business ,Diazepam ,medicine.drug - Abstract
The efficacy of DRIVEN-FLOW® M7-II(DFM7II) for seven drug groups was compared with Triage DOA® (Triage) using 340 autopsy urine samples taken from bodies within 1 month of death based on mass screening analysis of GC/MS and LC-MS/MS. The sensitivity to benzodiazepines was 0.56 in Triage and 0.53 in DFM7II with few false positives, and their accuracy was 0.88. Triage detected triazolo diazepine derivatives more easily than DFM7II. DFM7II detected diazepam and nitro benzodiazepines more easily than Triage. There were nine amphetamine false-positive cases of more than 10 days after death in Triage, but these were absent in DFM7II during this period. The accuracy of amphetamines for Triage was 0.96 and for DFM7II was 1. Tricyclic antidepressant (TCA) was detected in five cases by mass analysis, while there were four false-positive cases using Triage and eight cases using DFM7II. In the TCA false-positive cases of both kits, tricyclic psychotics such as chlorpromazine, carbamazepine, and quetiapine were included as well as the drug poisoning cases. There were no samples containing cocaine or THC. The accuracy of DFM7II for opiate and barbiturates was 1, but those of Triage was less than 1. Based on the above, DFM7II is a more accurate kit with fewer false-positives for target drug groups, other than TCA, than Triage.
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- 2021
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294. Analysis of Correlation Coefficients between Two Orthogonal Components of Strong-Motion Records
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Makoto Takao and Hiroaki Sato
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Physics ,Correlation ,Mathematical analysis ,Motion (geometry) - Published
- 2021
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295. Forty-Seven Samurai : A Tale of Vengeance & Death in Haiku and Letters
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Hiroaki Sato and Hiroaki Sato
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- Japanese poetry--History and criticism, Haiku--History and criticism, Samurai--History
- Abstract
One of the most spectacular vendettas ever: the history and haiku behind the mass-suicide featured in the 2013 film 47 Ronin. A remarkable and true tale of loyalty, vengeance, and ritual suicide.... In the spring of 1701, the regional lord Asano Naganori wounded his supervising official, Kira Yoshinaka, during an important ceremony in the ruling shogunate's Edo Castle and was at once condemned to death. Within two years, in the dead of winter, a band of forty-seven of Asano's retainers avenged him by breaking into Yoshinaka's mansion and killing him. Subsequently, all the men were sentenced to death but allowed to perform it honorably by seppuku. This incident—often called the Ako Incident—became a symbol of samurai honor andat once prompted stage dramatization in kabuki and puppet theater. It has since has been told and retold in short and long stories, movies, TV dramas. The story has also attracted the attention of foreign writers and translators. The most recent retelling was the 2013 Hollywood film 47 Ronin, with Keanu Reeves, though it was wildly and willfully distorted. What did actually happen and how has this famous vendetta resonated through history? Hiroaki Sato's examination is a close, comprehensive look at the Ako Incident through the context of its times, portraits of the main protagonists, and its literary legacy in the haiku ofthe avengers. Also included is Sato's new translation of Akutagawa Ryunosuke's short story about leader Oishi Kuranosuke as he awaited sentencing.
- Published
- 2019
296. Controlled Cross-Linking with Glucose Oxidase for the Enhancement of Gelling Potential of Pork Myofibrillar Protein
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Youling L. Xiong, Yoshiyuki Kumazawa, Xu Wang, and Hiroaki Sato
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inorganic chemicals ,Food Handling ,Swine ,Protein polymerization ,Radical ,Muscle Proteins ,Oxidative phosphorylation ,Glucose Oxidase ,0404 agricultural biotechnology ,Myosin ,Animals ,Glucose oxidase ,Solubility ,Muscle, Skeletal ,chemistry.chemical_classification ,Chromatography ,biology ,Hydroxyl Radical ,Chemistry ,04 agricultural and veterinary sciences ,General Chemistry ,040401 food science ,Red Meat ,Cross-Linking Reagents ,Enzyme ,biology.protein ,Rheology ,General Agricultural and Biological Sciences ,Myofibril ,Gels ,Oxidation-Reduction - Abstract
Differential oxidative modifications of myofibrillar protein (MP) by hydroxyl radicals generated in an enzymatic system with glucose oxidase (GluOx) in the presence of glucose/FeSO4 versus a Fenton system (H2O2/FeSO4) were investigated. Pork MP was modified at 4 °C and pH 6.25 with hydroxyl radicals produced from 1 mg/mL glucose in the presence of 80, 160, or 320 μg/mL GluOx and 10 μM FeSO4. Total sulfhydryl content, solubility, cross-linking pattern, and gelation properties of MP were measured. H2O2 production proceeded linearly with the concentration of GluOx and increased with reaction time. GluOx- and H2O2-dose-dependent protein polymerization, evidenced by faded myosin heavy chain and actin in SDS-PAGE as well as significant decreases in sulfhydryls, coincided with protein solubility loss. Firmer and more elastic MP gels were produced by GluOx than by the Fenton system at comparable H2O2 levels due to an altered radical reaction pathway.
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- 2016
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297. Degradation by ultra-violet light and its mechanism in organic solar cells
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Kenji Harafuji, Hiroaki Sato, Wafa Syakira Binti Azmi, and Yukio Onaru
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Materials science ,Fullerene ,Organic solar cell ,02 engineering and technology ,01 natural sciences ,law.invention ,Biomaterials ,law ,0103 physical sciences ,Materials Chemistry ,Electrical and Electronic Engineering ,010302 applied physics ,Equivalent series resistance ,business.industry ,Energy conversion efficiency ,General Chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Acceptor ,Cathode ,Electronic, Optical and Magnetic Materials ,Anode ,Degradation (geology) ,Optoelectronics ,0210 nano-technology ,business - Abstract
We experimentally investigate the optimum illumination wavelength range and the degradation mechanism by the ultra-violet (UV) light for small-molecule organic solar cells (OSCs) using various long-pass filters with different cutoff wavelengths λc. The OSC structure consists of an indium–tin–oxide (ITO, anode)/copper phthalocyanine (CuPc, donor)/fullerene (acceptor)/bathocuproine (buffer)/Ag (cathode). The initial power conversion efficiency ηp is not affected by the use of the long-pass filter with λc 400 nm, no distinct degradation appears. Thus, the origin of the degradation is revealed to be UV light with wavelengths less than 400 nm. The degradation mechanism is attributed to the decrease in carrier transport efficiency at the interface between ITO and CuPc film. Reorganization of the CuPc crystal structure occurs in the near-surface region on ITO due probably to the heat generated by the UV light. This would deteriorate the electrical contact at the interface, resulting in an increase in series resistance there.
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- 2016
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298. Cloning and Expression of Equine β-Nerve Growth Factor
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Christine Aurich, Hiroshi Matsuda, Yosuke Amagai, Hiroaki Sato, Saori Ishizaka, Kenshiro Matsuda, and Akane Tanaka
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030203 arthritis & rheumatology ,medicine.medical_specialty ,Messenger RNA ,biology ,Equine ,Growth factor ,medicine.medical_treatment ,Biological activity ,Molecular biology ,Homology (biology) ,Peripheral blood ,03 medical and health sciences ,0302 clinical medicine ,Endocrinology ,Nerve growth factor ,nervous system ,Neurotrophic factors ,Internal medicine ,biology.protein ,medicine ,Antibody ,030217 neurology & neurosurgery - Abstract
Nerve growth factor (NGF) is a neurotrophic factor that is essential for the maintenance of peripheral and central neurons. While importance of such physiological activities as well as the potential of it as a stress marker in Equus caballus has been implicated, the sequence of equine NGF remained unknown. In this study, we identified the sequence of equine NGF from the mRNA expressed in the peripheral blood in seven Thoroughbreds and three warmblood horses. There were no polymorphisms among samples analyzed, and the homology is more than 90% in comparison to human, mouse, rat, dog, and cow. When the sequence corresponding to the biologically active β-nerve growth factor was expressed in CHO-K1 cells, they were stained with an anti-NGF antibody that recognizes human NGF. Thus, it provides a rationale for using antibodies that react to other species' NGF to measure the equine NGF for further studies.
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- 2016
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299. Taking MALDI SpiralTOF high-resolution mass spectrometry and mass defect analysis to the next level with ethylene vinyl acetate vinyl alcohol terpolymers
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Hidenobu Aizawa, Thierry Fouquet, and Hiroaki Sato
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chemistry.chemical_compound ,Vinyl alcohol ,chemistry ,010401 analytical chemistry ,Organic Chemistry ,Ethylene-vinyl acetate ,Organic chemistry ,010402 general chemistry ,01 natural sciences ,Spectroscopy ,0104 chemical sciences ,Analytical Chemistry - Published
- 2016
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300. A review of the Japanese species of the family Tischeriidae (Lepidoptera)
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Kazutaka Yamada, Hiroaki Sato, Toshiya Hirowatari, Shigeki Kobayashi, and Nagao Hirano
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Corylus sieboldiana ,0106 biological sciences ,Symplocos ,010607 zoology ,Carpinus ,Coptotriche ,Ostrya ,010603 evolutionary biology ,01 natural sciences ,Tischeriidae ,Lepidoptera genitalia ,taxonomy ,Corylus ,Botany ,Symplocaceae ,Animalia ,mine ,leafminer ,Betula ,Ecology, Evolution, Behavior and Systematics ,sieboldiana ,biology ,genitalia ,biology.organism_classification ,Lepidoptera ,Pupa ,Tilia japonica ,Animal Science and Zoology ,Taxonomy (biology) ,Research Article - Abstract
This paper provides taxonomic and biological data on one new and one newly recorded species of Coptotriche Walsingham and one new and one newly recorded species of Tischeria Zeller from Japan. Coptotriche symplocosella Kobayashi & Hirowatari, sp. n. (host Symplocos lucida, Symplocaceae), and Tischeria kumatai Sato, Kobayashi & Hirowatari, sp. n. (host Tilia japonica, Malvaceae) are described. The pupal morphology of Coptotriche symplocosella is illustrated with scanning electron micrographs. Coptotriche minuta Diškus & Stonis, 2014 and Tischeria relictana Ermolaev, 1986 are newly recorded from Japan. The female, hostplants (Carpinus, Corylus, and Ostrya species), and immature stages of Coptotriche minuta and the adult features, female, and hostplants (Betula species) of Tischeria relictana are described with photographs and drawings for the first time. Mine types and characters of Japanese Tischeriidae are reviewed with photographs.
- Published
- 2016
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