Bamboo nanofiber preparation by HCW and grinding treatment and its application for nanocomposite     

Fuxiang Chang  Seung-Hwan Lee  Keisuke Toba  Asahiro Nagatani  Takashi Endo 《Wood Science and Technology》2012,46(1-3):393-403

A new approach to prepare cellulose nanofiber was attempted using the combined method of hot-compressed water (HCW) treatment and disk milling. The HCW treatment was effective in loosening the cell wall structure and enhancing fibrillation by disk milling. The fibrillated products showed fine fibrous morphology at the nanometer scale. Filtration time and specific surface area were measured as criteria of the degree of fibrillation, and both these values were increased in nanofibers obtained by disk milling after HCW treatment. The obtained nanofiber-reinforced polyurethane composite was prepared, and its tensile properties were drastically improved by the increased nanofiber content.  相似文献   

Influence of Watershed Topography on the Chemistry of Stream Water in a Mountainous Area     

Tanaka  Motoki  Suzuki  Keisuke 《Water, air, and soil pollution》2009,196(1-4):321-331

Water, Air, & Soil Pollution - The relation among the mean slope angle of a watershed, the stream water quality, and the chemical composition of the plagioclase component of granite was...  相似文献   

Isoprenoid-substituted flavonoids from wood of Artocarpus heterophyllus on B16 melanoma cells: Cytotoxicity and structural criteria     

Enos Tangke Arung  Keisuke Yoshikawa  Kuniyoshi Shimizu  Ryuichiro Kondo 《Fitoterapia》2010

As a result of cytotoxicity-guided fractionation, nine flavonoids, artocarpin (1), cudraflavone C (2), 6-prenylapigenin (3), kuwanon C (4), norartocarpin (5), albanin A (6), cudraflavone B (7), brosimone I (8) and artocarpanone (9) were identified from the methanol extract of the wood of Artocarpus heterophyllus, known commonly as Nangka in Indonesia. A structure–activity investigation of the effect of these isolated compounds (1–9) and structurally related compounds on B16 melanoma cells indicated that isoprenoid moiety substitutions in flavonoids enhance their cytotoxicity, and that the position of attachment and the number of isoprenoid-substituent moieties per molecule influence flavonoid cytotoxicity.  相似文献   

Gibberella ear rot of corn caused by <Emphasis Type="Italic">Fusarium asiaticum</Emphasis> in Japan     

Akira?KawakamiEmail author  Naoki?Kato  Takahide?Sasaya  Keisuke?Tomioka  Hiroyoshi?Inoue  Atsushi?Miyasaka  Kazuyuki?Hirayae 《Journal of General Plant Pathology》2015,81(4):324-327

Ear rot with white or pink mold was found on corn (Zea mays L.). A species of Fusarium, not registered previously as a pathogen causing Gibberella ear rot of corn in Japan, was isolated from the rotted ear. The isolates, identified as F. asiaticum based on morphological characteristics and nucleotide sequences, caused white or pink mold on corn ear after inoculation. Moreover, the 3-acetyl deoxynivalenol chemotype and the nivalenol chemotype were found in the isolates. We propose to include F. asiaticum as one of the pathogens causing Gibberella ear rot of corn in Japan.  相似文献   

Radiation use efficiency,N accumulation and biomass production of high-yielding rice in aerobic culture   总被引：1，自引：0，他引：1  

Keisuke Katsura  Midori Okami  Hiroaki Mizunuma  Yoichiro Kato 《Field Crops Research》2010

The concept of aerobic culture is to save water resource while maintaining high productivity in irrigated rice ecosystem. This study compared nitrogen (N) accumulation and radiation use efficiency (RUE) in the biomass production of rice crops in aerobic and flooded cultures. The total water input was 800–1300 mm and 1500–3500 mm in aerobic culture and flooded culture, respectively, and four high-yielding rice cultivars were grown with a high rate of N application (180 kg N ha⁻¹) at two sites (Tokyo and Osaka) in Japan in 2007 and 2008. The aboveground biomass and N accumulation at maturity were significantly higher in aerobic culture (17.2–18.5 t ha⁻¹ and 194–233  kg N ha⁻¹, respectively) than in flooded culture (14.7–15.8 t ha⁻¹ and 142–173 kg N ha⁻¹) except in Tokyo in 2007, where the surface soil moisture content frequently declined. The crop maintained higher N uptake in aerobic culture than in flooded culture, because in aerobic culture there was a higher N accumulation rate in the reproductive stage. RUE in aerobic culture was comparable to, or higher than, that in flooded culture (1.27–1.50 g MJ⁻¹ vs. 1.20–1.37 g MJ⁻¹), except in Tokyo in 2007 (1.30 g MJ⁻¹ vs. 1.37 g MJ⁻¹). These results suggest that higher biomass production in aerobic culture was attributable to greater N accumulation, leading to higher N concentration (N%) than in flooded culture. Cultivar differences in response to water regimes were thought to reflect differences in mainly (1) early vigor and RUE under temporary declines in soil moisture in aerobic culture and (2) the ability to maintain high N% in flooded culture.  相似文献   

Comparison of the behavior of skipjack (Katsuwonus pelamis), yellowfin (Thunnus albacares) and bigeye (T. obesus) tuna associated with drifting FADs in the equatorial central Pacific Ocean          下载免费PDF全文

Takayuki Matsumoto  Keisuke Satoh  Yasuko Semba  Mikio Toyonaga 《Fisheries Oceanography》2016,25(6):565-581

We evaluated the behavior of skipjack (Katsuwonus pelamis), yellowfin (Thunnus albacares) and bigeye tuna (T. obesus) associated with drifting fish aggregating devices (FADs) in the equatorial central Pacific Ocean. A total of 30 skipjack [34.5–65.0 cm in fork length (FL)], 43 yellowfin (31.6–93.5 cm FL) and 32 bigeye tuna (33.5–85.5 cm FL) were tagged with coded transmitters and released near two drifting FADs. At one of the two FADs, we successfully monitored the behavior of all three species simultaneously. Several individuals remained around the same FAD for 10 or more days. Occasional excursions from the FAD were observed for all three species, some of which occurred concurrently for multiple individuals. The detection rate was higher during the daytime than the nighttime for all the species, and the detection rate for bigeye tuna was higher than for yellowfin or skipjack tuna. The swimming depth was deeper during the daytime than nighttime for all species. The fish usually remained shallower than 100 m, but occasionally dived to around 150 m or deeper, most often for bigeye and yellowfin tuna during the daytime. The swimming depth for skipjack tuna was shallower than that for bigeye and yellowfin tuna, although the difference was not large, and is probably not sufficient to allow the selective harvest of skipjack and yellowfin tuna by the purse seine fishery. From the detection rate of the signals, bigeye tuna is considered to be more vulnerable to the FAD sets than yellowfin and skipjack tuna.  相似文献   

Immobilization of Antimony(III) in Oxic Soil Using Combined Application of Hydroxyapatite and Ferrihydrite     

Shouhei Ogawa  Masahiko Katoh  Chiya Numako  Keisuke Kitahara  Serika Miyazaki  Takeshi Sato 《Water, air, and soil pollution》2016,227(4):124

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High expression of Bcl-xL in delayed apoptosis of canine neutrophils induced by lipopolysaccharide     

Sano J  Oguma K  Kano R  Yazawa M  Tsujimoto H  Hasegawa A 《Research in veterinary science》2005,78(2):183-187

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Accelerated neutrophil apoptosis in 2 canine cases of hepatic disorder     

Oguma K  Sano J  Kano R  Watari T  Hasegawa A 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2003,65(3):415-417

Accelerated neutrophil apoptosis was confirmed by TUNEL assay in two canine cases of hepatic disorder. One dog was diagnosed as having lymphocytic hepatitis and the other lymphocytic cholangitis by histopathology of liver biopsy specimen.  相似文献   

Canine Bcl-xL gene and its expression in tumor cell lines     

Sano J  Oguma K  Kano R  Hasegawa A 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2003,65(1):149-151

The canine Bcl-xL gene was cloned and sequenced. Canine Bcl-xL cDNA clone was 1252 bp in length, and encoded 233 deduced amino acides. The predicted canine Bcl-xL amino acid sequence shared 99.6%, 97.0%, 97.9%, 98.7% and 98.3% homology with that of human, mouse, rat, sheep and pig Bcl-xL, respectively. RT-PCR analysis revealed that canine Bcl-xL mRNA was constitutively expressed in CL-1 (canine lymphoma) and GL-1 (canine B cell leukemia) cell lines.  相似文献