Entity

Time filter

Source Type


Inui R.,Kyushu University | Nishida T.,Japan Pulp and Paper Research Institute Inc. | Onikura N.,Kyushu University
Ecology and Civil Engineering | Year: 2012

The objective of this study is to understand the characteristics of fish assemblages in the boat slips of two fishing ports. We obtained fish samples from 39 sites, including two fishing ports on the 150-km coastline of northwestern Kyushu, Japan. Cluster analyses and nonparametric multiple comparison reveal that the boat slips contain many species of immature fish in large numbers. In contrast, they contain adult fish of far fewer species in smaller numbers. Therefore, we conclude that the boat slips potentially serve an ecological function as nursery grounds for immature fish. On the other hand, they may be unsuitable for sustaining adult fish. Source


Kaneko R.,Japan Pulp and Paper Research Institute Inc. | Kaneko R.,University of Tsukuba | Nakagawa-Izumi A.,University of Tsukuba | Kajiyama M.,University of Tsukuba | Doi S.,University of Tsukuba
Sociobiology | Year: 2011

The effects of4 aromatic monomers on the rate of hydrogen emission from the termite Coptotermes formosanus were studied. The hydrogen emission rate, based on the mass of intake, from the termites that were fed cellulose immersed with vanillin, was higher than that of the termites that were fed only cellulose. The PCR-DGGE band patterns, indicating the diversity of the bacterial flora obtained from the guts ofthe termites fed cellulose with aromatic monomers were different from that ofthe control termites, indicating that the intestinal bacterial flora was affected by the monomers. To investigate the direct effects ofthe monomers on the bacterial flora, the hydrogen emission rate was determined by analyzing the headspace gas in a glass vial in which the excised termite guts, with the intestinal contents after feeding with cellulose, were incubated in the mineral solution containing vanillin as a monomer sample. The results showed that the addition of vanillin at the lower concentration (10 ppm) enhanced hydrogen emission; however, no effect was observed at the higher concentration (100 ppm). The same effect was observed following the addition of 3,4-dimethoxybenzaldehyde. It was concluded that a low concentration of some aromatic monomers derived from lignin affects the bacterial flora in the gut ofthe termite in a way that changes the hydrogen emission rate from the termite. Source


Inui R.,Kyushu University | Nishida T.,Japan Pulp and Paper Research Institute Inc. | Onikura N.,Kyushu University | Eguchi K.,Saga Prefectural Fisheries Research and Development Center | And 3 more authors.
Estuarine, Coastal and Shelf Science | Year: 2010

We aim to understand the relationships between physical conditions and characteristics of the immature-fish community in surf zones of sandy beaches. Therefore, we obtained fish samples between March 2007 and February 2008 and analyzed certain physical conditions in the surf zones of 21 sandy beaches on the coastline of the northwestern Kyushu Island, Japan. We collected a total of 83 species and 6458 immature individuals. In a BIO-ENV analysis, the highest correlation was observed between fish assemblage and S20 (i.e., the slope from the shoreline to the sites where the depth was 20 m) and current velocity (CV) values. Stepwise multiple linear regression analyses revealed that the number of species and individuals decrease with an increase in the S20 and CV values. These results show that species richness and the abundance of immature-fish increase under shelving and calm conditions. Thus, immature-fish assemblages are strongly influenced by the prevailing physical conditions. Moreover, in six of the 10 dominant species, a negative correlation was observed between CV and abundance. On the other hand, S20 was found to be the explanatory variable only in the case of the most dominant species, i.e., Gymnogobius breunigii. Furthermore, a positive correlation was observed between S1 (i.e., the slope from the shoreline to the sites where the depth was 1.0 m at the mean tidal level) and median particle size (i.e., MPS of the sediments) and the abundances of Sillago japonica and Favonigobius gymnauchen, respectively, and a negative correlation with salinity, in the case of Acanthogobius lactipes. We conclude that the characteristics of the fish community in surf zones on sandy beaches are determined by not only the shelving and calm conditions, which influence fish assemblages and abundances, but also the habitat diversity, which influences the diversity of fish species. © 2009 Elsevier Ltd. All rights reserved. Source


Konno H.,Nippon Paper Industries Co. | Goto H.,Nippon Paper Industries Co. | Takahashi K.,Nippon Paper Chemicals Co. | Nanri Y.,Japan Pulp and Paper Research Institute Inc.
Appita Annual Conference | Year: 2010

Precipitated calcium carbonate is produced as a by-product in the causticizing process of the kraft pulping process. Nippon Paper Industries, co.,ltd has used this Calcium Carbonate by the Causticizing process (CCC) as filler and coating pigment since nearly 30 years ago. By using this CCC as filler and coating pigment in a paper, lime kiln operation can be reduced or eliminated, resulting in the reduction of fuel consumption in the lime kiln operation. Furthermore, the build-up of non-process elements in the lime cycle, which is one of major concerns in the chemical recovery process, can be avoided because lime mud is taken out from the lime cycle with producing CCC. On the other hands, our company has developed the morphology control technology of CCC. Initially, the precipitation of aragonite CCC was investigated at a laboratory scale. Then, the scale up trial was carried out at a pilot and a mill scale plant. Based on these fundamental research and developments, the industrial process to manufacture aragonite CCC with batch process has been established. Subsequently, the morphology control technology with continuous process was investigated at a laboratory scale and the results indicated that there was the possibility to produce aragonite CCC in the continuous operation. Source


Yasokawa D.,Hokkaido Food Processing Research Center | Murata S.,Japan National Institute of Advanced Industrial Science and Technology | Iwahashi Y.,Japan National Food Research Institute | Kitagawa E.,Japan National Institute of Advanced Industrial Science and Technology | And 3 more authors.
Journal of Bioscience and Bioengineering | Year: 2010

Zinc pyrithione has been used in anti-dandruff shampoos and in anti-fouling paint on ships. However, little is known of its mode of action. We characterized the effects of sub-lethal concentrations of zinc pyrithione (Zpt) on Saccharomyces cerevisiae using DNA microarrays. The majority of the strongly upregulated genes are related to iron transport, and many of the strongly downregulated genes are related to the biosynthesis of cytochrome (heme). These data suggest that Zpt induces severe iron starvation. To confirm the DNA microarray data, we supplemented cultures containing Zpt with iron, and the growth of the yeast was restored significantly. From these results, we propose that the principal toxicity of zinc pyrithione arises from iron starvation. © 2009 The Society for Biotechnology, Japan. Source

Discover hidden collaborations