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153 results on '"Hattori, Nobuaki"'

6. C[O.sub.2] laser-incised teak and mahogany lumber dried by microwave and steam injection

Author

Listyanto, Tomy, Ando, Keisuke, Yamauchi, Hidefumi, and Hattori, Nobuaki

Subjects
Lumber -- Drying, Business, Forest products industry
Abstract

Abstract The aim of this study was to investigate the application of microwave and steam injection drying on C[O.sub.2] laser-incised teak (Tectona grandis) and mahogany (Swietenia mahagoni) lumber. The specimens [...]

Published
2016
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18. Mitochondrial DNA heteroplasmy in wheat, Aegilops and their nucleus-cytoplasm hybrids

Author

Hattori, Nobuaki, Kitagawa, Kazuaki, Takumi, Shigeo, and Nakamura, Chiharu

Subjects
Cytoplasmic inheritance -- Analysis, Mitochondrial DNA -- Genetic aspects, Polymerase chain reaction -- Usage, Wheat -- Genetic aspects, Biological sciences
Abstract

A mitochondrial (mt) transcriptional unit, nad3-orf156, was studied in the nucleus-cytoplasm hybrids of wheat with D/D2 plasmons from Aegilops species and their parental lines. A comparative RFLP analysis and sequencing of the random PCR clones revealed the presence of seven sequence types and their polymorphic sites were mapped. All the hybrids possessed the paternal copies besides the maternal copies. More paternal copies were present in the D2 plasmon hybrids, whereas more maternal copies were present in the D plasmon hybrids. Two major copies were present with different stoichiometries in the maternal Aegilops parents. However, only a major D plasmon copy was detected in the hybrids, irrespective of their plasmon types. The hexaploid wheat parent (AABBDD genome) possessed the major D plasmon copy in ~5% stoichiometry, while no D plasmon-homologous copies were detected in the tetraploid wheat parent (AABB genome),The results suggest that the observed mtDNA heteroplasmy is due to paternal contribution of mtDNA. The different copy stoichiometry suggests differential amplification of the heteroplasmic copies among the hybrids and the parental lines. All editing sites and their editing frequencies were conserved among the lines, and only the maternal pattern, of editing occurred in the hybrids.

Published
2002

23. A tool wear sensor for circular saws using wavelet transform signal processing

Author

Suetsugu, Yoshitaka, Ando, Keisuke, Hattori, Nobuaki, and Kitayama, Shigeru

Subjects
Mechanical wear -- Analysis -- Usage, Sensors -- Usage, Circular saws -- Analysis -- Usage, Business, Forest products industry, Usage, Analysis
Abstract

Abstract Universality and usefulness of the tool wear index developed by the wavelet transform of a circular saw is discussed in this paper. Gutting tests were carried out on an [...]

Published
2005

29. Preservative leaching from copper azole-treated lumber: a comparison between the full-cell method and the passive-impregnation method

Author

Ando, Keisuke, Islam, Md Nazrul, Yamauchi, Hidefumi, and Hattori, Nobuaki

Subjects
Wood preservatives -- Methods -- Measurement, Business, Forest products industry
Abstract

Abstract This study investigated the leaching of copper azole (CA-B) preservative, according to JIS K 1571 standard, from sundri (Heritiera fomes Buch.-Ham.) lumber treated by full-cell and passive-impregnation methods. Although [...]

Published
2011

39. The Usefulness of Gastric Mass Screening Using Serum Pepsinogen Levels Compared with Photofluorography

Author

Yoshihara, Masaharu, Sumii, Koji, Haruta, Ken, Kiyohira, Kuninushi, Hattori, Nobuaki, Tanaka, Shinji, Kajiyama, Goro, and Shigenobu, Takuso

Subjects
Gastric mass screening, Photofluorography, Gastric cancer, digestive system, Serum pepsinogen, digestive system diseases
Abstract

Chronic atrophic gastritis, which is thought to be a high risk for gastric cancer, can be diagnosed by serum pepsinogen levels. We compared the usefulness of the measurement of pepsinogen levels and indirect photofluorography as indicators of gastric cancer in a mass screening involving 5,620 Japanese subjects (mean age: 60.1 years old; male : female = 2,268 : 3,352) in 1991 and 1992. Subjects with a serum pepsinogen I level below 30 μg/liter or a pepsinogen I/II ratio below 2.0 were considered to be at high risk of gastric cancer. The incidence of gastric cancer and the ratio of early cancers detected by pepsinogen levels (0.12%, 4/7) were similar to those detected by photofluorography (0.11 %, 4/6). Our results showed that mass screening using pepsinogen levels was as useful as indirect photofluorography for the detection of gastric cancer in Japan. In addition, our results showed that the sensitivity of gastric mass screening was increased when the measurement of serum pepsinogen levels was combined with photofluorography.

Published
1997

44. Microwell-mediated Control of Embryoid Body Size Regulates Embryonic Stem Cell Fate Via Differential Expression of WNT5a and WNT11

Author

Harvard University--MIT Division of Health Sciences and Technology, Khademhosseini, Ali, Hwang, Yu-Shik, Chung, Bong Geun, Moeller, Hannes-Christian, Ortmann, Daniel, Hattori, Nobuaki, Harvard University--MIT Division of Health Sciences and Technology, Khademhosseini, Ali, Hwang, Yu-Shik, Chung, Bong Geun, Moeller, Hannes-Christian, Ortmann, Daniel, and Hattori, Nobuaki

Abstract

Recently, various approaches for controlling the embryonic stem (ES) cell microenvironment have been developed for regulating cellular fate decisions. It has been reported that the lineage specific differentiation could be affected by the size of ES cell colonies and embryoid bodies (EBs). However, much of the underlying biology has not been well elucidated. In this study, we used microengineered hydrogel microwells to direct ES cell differentiation and determined the role of WNT signaling pathway in directing the differentiation. This was accomplished by forming ES cell aggregates within microwells to form different size EBs. We determined that cardiogenesis was enhanced in larger EBs (450 μm in diameter), and in contrast, endothelial cell differentiation was increased in smaller EBs (150 μm in diameter). Furthermore, we demonstrated that the EB-size mediated differentiation was driven by differential expression of WNTs, particularly noncanonical WNT pathway, according to EB size. The higher expression of WNT5a in smaller EBs enhanced endothelial cell differentiation. In contrast, the increased expression of WNT11 enhanced cardiogenesis. This was further validated by WNT5a-siRNA transfection assay and the addition of recombinant WNT5a. Our data suggest that EB size could be an important parameter in ES cell fate specification via differential gene expression of members of the noncanonical WNT pathway. Given the size-dependent response of EBs to differentiate to endothelial and cardiac lineages, hydrogel microwell arrays could be useful for directing stem cell fates and studying ES cell differentiation in a controlled manner., National Institutes of Health (U.S.) (DE019024, HL092836, and EB007249)

Published
2010

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