著者
荒牧 憲隆 A.K.M. Badrul Alam 玉村 修司 上野 晃生 村上 拓馬 金子 勝比古
出版者
一般社団法人 資源・素材学会
雑誌
Journal of MMIJ (ISSN:18816118)
巻号頁・発行日
vol.133, no.7, pp.173-181, 2017-07-01 (Released:2017-07-28)
参考文献数
33

Peat from highly organic soil is abundant in Northern Hokkaido, Japan. In the past, peat was used in various applications in Japan, such as an artificial culture of soil, as a fertilizer for gardening, and as an energy resource. However, peat is not used by the modern energy and manufacturing sectors in Japan because it has a high moisture content and low calorific value, which lowers its value as a resource considering its material characteristics and handling difficulties. Furthermore, large amounts of peat are generated at the construction sites in this area, and they are difficult to be reused at their generation sites because peat is a very soft soil and not suitable for construction work. Recently, many Japanese research institutions have been carrying out research and development on renewable energy resources including biomass energy. In Hokkaido, there are many biogas plants for methanizing biomass derived from livestock excrement or food waste. Thus, peat which is high in organic matter could potentially be used as an energy resource. In this study, we investigated the potential of utilizing peat as an energy resource for biogenic methane production in regional cities of Northern Hokkaido, while considering both its material characteristics and resource circulation. Batch tests using a hydrogen peroxide solution were performed on peat and silty soil to estimate the quantity of low-molecular-weight organic acids and the producing potential for biogenic methane gas. The oxidative decomposition of the peat produced a high yield of low-molecular-weight organic acids that were used as substrates for methanogenic microorganisms. In addition, a novel resource circulation method was proposed for peat in order to use it as an energy resource. Moreover, the energy resources problem in Northern Hokkaido was discussed in association with geographical parameters and the construction recycling system in Japan.
著者
中原 元和 クロス フォード・A・
出版者
日本水産學會
雑誌
日本水産学会誌 (ISSN:00215392)
巻号頁・発行日
vol.44, no.5, pp.419-425, 1978
被引用文献数
4

The transfer of cobalt-60 from phytoplankton (primary producer) to clams (primary consumer) was investigated to obtain additional information about the movement of cobalt-60 in the marine ecosystem. The retention (%) of cobalt-60 in the clams after feeding radioactive phytoplankton varied with size of the clams and cell density and species of phytoplankton fed to the clams. At high cell densities (2×10<sup>8</sup> and 5×10<sup>8</sup> cells/l), the retention of cobalt-60 by the clams was reduced with increasing cell density and size of the clams. More than 43% of the radioactivity which was introduced into the pallial cavity of the clams with the diatom (Nitzschia closterium) at cell densities less than 5×10<sup>7</sup> cells/l was retained in the clams two days after feeding.
著者
杉山 裕子 Hatcher Patrick G. 三田村 緒佐武 片野 俊也 熊谷 哲 中野 伸一 DRUCKER Valentin V. FIALKOV Vladimir A. 杉山 雅人
出版者
日本地球化学会
雑誌
地球化学 (ISSN:03864073)
巻号頁・発行日
vol.42, no.4, pp.165-177, 2008
被引用文献数
1

Lake Baikal, located on the north-eastern borders of Central Asia, is the deepest (maximum depth 1,700 m) and one of the largest lakes in the world. To elucidate the chemical composition of dissolved organic matter (DOM) in the Lake Baikal, we applied high resolution fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS) to the lake water samples. Water samples were taken at the deepest point of Lake Baikal and its inflowing Barguzin River mouth on August 2005. The sample water was filtrated on board and DOM was extracted using C 18 solid-phase extraction disks (Kim et al., 2003^a). The extracted samples on the disks were analyzed by a 9.4-T FT-ICR mass spectrometer at the National High Magnetic Field Laboratory (Tallahassee, FL, USA) in negative ionization mode with a needle voltage of -2.0 kV. From the FT-ICR mass analysis, 3511, 2862 and 2191 peaks were detected (S/N>3) in river and 5 m- and 945 m- depth lake water samples, and more than 80% of the peaks were assigned within ± 1.0 ppm error. Using van Krevelen Diagrams (van Krevelen, 1950), we found that the main component of L. Baikal DOM was allochthonous lignin-like organic molecule, and that autochthonous lipid- and protein-like molecules were also found in surface water.
著者
Asmaa G. SALEH Shehata I. ANWAR Osama M. ABAS Hoda A. ABD-ELLATIEFF Mohamed NASR Ibrahim SALEH Hideto FUKUSHI Tokuma YANAI
出版者
公益社団法人 日本獣医学会
雑誌
Journal of Veterinary Medical Science (ISSN:09167250)
巻号頁・発行日
pp.17-0076, (Released:2017-07-15)
被引用文献数
5

This study aimed to investigate the neuropathogenesis of equine herpes virus 9 (EHV-9) by studying the effects of a single point mutation introduced in two different EHV-9 genes. The two EHV-9 mutants, 14R and 19R, were generated carrying a point mutation in two separate EHV-9 genes. These mutants, along with the wild-type EHV-9, were used to infect a hamster model. The EHV-9- and 19R-infected groups showed earlier and more severe clinical signs of infection than the 14R-infected group. The white blood cells (WBCs) count was significantly increased in both EHV-9- and 19R-infected groups compared to the 14R-infected group at the 4th day post infection (DPI). Viremia was also detected earlier in both EHV-9- and 19R-infected groups than 14R-infected group. There were differences in the anterograde transmission pattern of both EHV-9 and 19R compared to 14R inside the brain. Serum TNF-α, IL-6 and IFN-γ levels were significantly increased in both EHV-9- and 19R-infected groups compared to the 14R-infected group. Histopathological and immunohistochemical analyses revealed that the mean group scores for the entire brain were significantly higher in both EHV-9- and 19R- infected groups than 14R-infected group. Collectively, these results confirm that the gene product of Open Reading Frame 19 (ORF19) plays an important role in EHV-9 neuropathogenicity and that the mutation in ORF19 is responsible for the attenuation of EHV-9.
著者
Saejong YOO Jiyong KIM Hyun-Wook MYUNG Suhan WOO Dai-Jung CHUNG A-Jin LEE Han-Jun KIM Sun-Hee DO Hwi-Yool KIM
出版者
公益社団法人 日本獣医学会
雑誌
Journal of Veterinary Medical Science (ISSN:09167250)
巻号頁・発行日
vol.79, no.1, pp.192-196, 2017 (Released:2017-01-24)
参考文献数
13
被引用文献数
4

A 12-year-old, spayed female Schnauzer presented with constipation. A mass was observed in the pelvic cavity, and metastasis was not identified. Mass resection was performed through celiotomy with pubic osteotomy, and hemangiosarcoma was diagnosed. At 10 weeks post-operatively, the patient died of multiple metastasis. Primary intrapelvic hemangiosarcoma is rare in dogs.
著者
Kazutaka HIRAI Akimasa TSUJIMOTO Kie NOJIRI Hirofumi UETA Toshiki TAKAMIZAWA Wayne W. BARKMEIER Mark A. LATTA Masashi MIYAZAKI
出版者
日本歯科理工学会
雑誌
Dental Materials Journal (ISSN:02874547)
巻号頁・発行日
pp.2016-019, (Released:2017-06-23)
参考文献数
31
被引用文献数
4

The influence of photoirradiation conditions on dentin bond durability and interfacial characteristics of universal adhesives was investigated. Universal adhesives were applied to the dentin surfaces and photoirradiated with 100 mW/cm2 for 40 s, 200 mW/cm2 for 20 s, and 400 mW/cm2 for 10 s. A resin composite was bonded to dentin to determine shear bond strength after 24 h water storage and 30,000 thermal cycles, and water contact angle of cured adhesive were measured by the sessile drop method. Greater dentin bond strengths after 24 h water storage and 30,000 thermal cycles were achieved under these conditions at light intensity exceeding 200 mW/cm2. Universal adhesives photoirradiated above 200 mW/cm2 exhibited significantly higher water contact angles than those at 100 mW/cm2. The results of this study suggested that the photoirradiation conditions affect the dentin bond durability and interfacial characteristics of universal adhesives even at the same total energy.
著者
Ngai Hang Yury A. Kutoyants
出版者
日本統計学会
雑誌
JOURNAL OF THE JAPAN STATISTICAL SOCIETY (ISSN:18822754)
巻号頁・発行日
vol.40, no.2, pp.277-303, 2010-03-22 (Released:2011-09-22)
参考文献数
36
被引用文献数
2 3

In this article, several important problems of threshold estimation in a Bayesian framework for nonlinear time series models are discussed. The paper starts with the issue of calculating the maximum likelihood and the Bayesian estimators for threshold autoregressive models. It turns out that the asymptotic efficiency of the Bayesian estimators in this type of singular estimation problems is superior than the maximum likelihood estimators. To illustrate the properties of these estimators and to explain the proposed method, the paper begins with the study of a linear threshold autoregressive model with i.i.d. Gaussian noise. The paper then extends the idea to other nonlinear and non-Gaussian models and illustrates the paradigm of limiting likelihood ratio, which is applicable to a much wider class of nonlinear models. The article also investigates the robustness issue and the possibility of restricting the observation window by narrow bands, which allows one to obtain asymptotically efficient estimators. Finally, the paper indicates how these results can be generalized from a TAR(1) model to a higher-order TAR(p) model with multiple thresholds. The paper concludes with a discussion of other related problems and illustrates the methodology by numerical simulations.
著者
Shinzo Tsuda Yuko Fukui Noriko Nakamura Yukihisa Katsumoto Keiko Yonekura-Sakakibara Masako Fukuchi-Mizutani Kazuyuki Ohira Yukiko Ueyama Hideo Ohkawa Timothy A. Holton Takaaki Kusumi Yoshikazu Tanaka
出版者
日本植物細胞分子生物学会
雑誌
Plant Biotechnology (ISSN:13424580)
巻号頁・発行日
vol.21, no.5, pp.377-386, 2004 (Released:2005-06-03)
参考文献数
34
被引用文献数
35 76

Petunia flower colors are mainly due to flavonoids. The flower color of commercial varieties of Petunia hybrida was successfully modified by the suppression of endogenous flavonoid biosynthetic genes, the expression of a hetelorogous flavonoid biosynthetic gene, and the combination of both. Flower color changed from purple to almost white or from purple to red by the suppression of the endogenous gene expression, from red to orange by the down-regulation of the flavonoid 3′-hydroxylase gene and the expression of the rose dihydroflavonol 4-reductase gene, and from violet to pale violet by the expression of the flavonol synthase or flavone synthase gene. These results clearly indicate the usefulness of metabolic engineering of the flavonoid biosynthetic pathway to modify flower color. Only a few of the transgenic petunia exhibited phenotypic stability. For commercialisation, it is necessary to generate many independent transgenic lines, select elite lines with stable phenotypes and maintain them in tissue culture.
著者
BAKER Gizelle ZULOETA A. GONZALEZ BENZIMRA M. VALLELIAN J.F. SANDALIC L. PICAVET P. BOURDONNAYE G. DE LA LÜDICKE F.
出版者
日本毒性学会
雑誌
日本毒性学会学術年会
巻号頁・発行日
vol.43, pp.O-53, 2016

Tobacco harm reduction is a public health strategy to lower the health risks to individual tobacco users and benefit the health of the population as a whole. Philip Morris International is developing a portfolio of products, including iQOS with the potential to reduce the risks of diseases associated with smoking conventional cigarettes. <br><br>PMI has conducted a series of clinical studies in Japan to assess the nicotine pharmacokinetic profile and reductions in exposure to harmful and potentially harmful constituents (HPHCs). Now that has been launched in Japan, PMI is starting a Post-Market Program in Japan including an observational cohort study, the “LYFE” Study (April 2016).<br><br>The LYFE Study will enroll 2000 iQOS users, 2000 CC smokers and 760 never-smokers over a period of 4 years in equally distributed annual waves and will follow participants for up to 5 years. The study is designed to assess how consumers use of tobacco and nicotine products (including iQOS) change over time, the patterns of product use and behavioral trajectories of smoking. Participants will complete questionnaires at enrollment and then at up to 13 time-points over the follow-up period. <br><br>In addition a Clinical Sub-Study will enroll 2280 participants, 760 iQOS consumers, matched 1:1 with CC smokers and never-smokers. Participants in the Clinical Sub-Study will have 2 clinical site visits (at 1 and 3 years) to perform physical exams and collect biological samples to assess population-level differences in biomarkers of exposure and clinical risk endpoints.