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,-dimethylacrylamide hydrogels深澤 倫子*; 池田 尚弘*; 田畑 麻友*; 服部 正孝*; 相澤 守*; 柚木 俊二*; 関根 由莉奈
Journal of Polymer Science, Part B; Polymer Physics, 51(13), p.1017 - 1027, 2013/07
被引用回数：36 パーセンタイル：75.18(Polymer Science)To investigate the effects of crosslinker density on the properties of hydrogels, compression tests, scanning electron microscopy (SEM), differential scanning calorimetry (DSC), and Raman measurements were performed on poly-,-dimethylacrylamide hydrogels. The results of the compression tests showed that the Young's modulus increases as the crosslinker density increases. In addition, the results suggest that the bound water plays an important role in strengthening the hydrogel. The water structure may be one of the dominant factors governing the chemical and physical properties of hydrogels.
nodules箱山 雅生*; 多井 諒*; 弭間 和哉*; 須賀 江里*; 足達 由佳*; 小林 麻由美*; 赤井 理恵*; 佐藤 修正*; 深井 英吾*; 田畑 哲之*; et al.
Plant Physiology, 160(2), p.897 - 905, 2012/10
被引用回数：29 パーセンタイル：67.73(Plant Sciences)Rhizobial symbiotic nitrogen fixation in root nodules is regulated by the host legume genes. Fix- mutants that exhibit lower or no nitrogen-fixation activity are useful to identify host plant genes required for symbiotic nitrogen fixation. Here, we show a novel Fix- mutant defective of a SNARE protein. The mutant formed nodules that displayed lower nitrogen fixation activity, and the growth of the host plant was retarded. Exogenous combined nitrogen almost recovered the growth of the mutant. Numbers of nodules formed on the mutant were similar to those on the wild-type plant. However, the mutant nodules were smaller and showed early senescence. The causal gene was identified by map-based cloning, and the predicted protein was appeared to be homologous to one of SNARE proteins found in Arabidopsis thaliana. The responsible gene was expressed ubiquitously in shoot, roots and nodules. In roots and nodules, the transcripts were detected in vascular bundles. These results indicated that a SNARE protein expressed in vascular tissues is required for nitrogen fixation activity of rhizobia in nodules.
箱山 雅生*; 多井 諒*; 弭間 和哉*; 須賀 江里*; 足達 由佳*; 小林 麻由美*; 赤井 理恵*; 佐藤 修正*; 深井 英吾*; 田畑 哲之*; et al.
no journal, ,
Rhizobial symbiotic nitrogen fixation in root nodules is regulated by the host legume genes. Fix- mutants that exhibit lower or no nitrogen-fixation activity are useful to identify host plant genes required for symbiotic nitrogen fixation. Here, we show a Lotus japonicus novel Fix- mutant defective of a SNARE protein. The mutant formed nodules that displayed lower nitrogen fixation activity, and the growth of the host plant was retarded. Exogenous combined nitrogen almost recovered the growth of the mutant. Numbers of nodules formed on the mutant were similar to those on the wild-type plant. However, the mutant nodules were smaller and showed early senescence. The causal gene was identified by map-based cloning, and the predicted protein was appeared to be homologous to one of SNARE proteins found in Arabidopsis thaliana. The responsible gene was expressed ubiquitously in shoot, roots and nodules. In roots and nodules, the transcripts were detected in vascular bundles. These results indicated that a SNARE protein expressed in vascular tissues is required for nitrogen fixation activity of rhizobia in nodules.
