44 research outputs found
ãããããªããŒã®åœ¢ç¶ååžãšç·©åã®ç 究
é沢倧åŠçåŠéšå¹³æ8幎床ã¯ããããããªããŒã®ç©æ§ã®ç 究ãšãã©ã³ãã åªè³ªäžã®ããªãŠã ã®æ§è³ªã®ç 究ãè¡ãªã£ãã以äžã«ãã®ææãå ±åããã(1)æã
ã¯ãããããªããŒã®ã¢ãã«ã«é¢ããŠããã«ãã«ããã«ã«æ³ãçšããã·ãã¥ã¬ãŒã·ã§ã³ãè¡ãªã£ãã枩床ã«ãã£ãŠãæ
£æ§ååŸR_gã®ååžãç°ãªãããšãããã£ããèªç±ãšãã«ã®ãŒãæ
£æ§ååŸã®é¢æ°ãšããŠæ±ãããäžéçãªæž©åºŠã«ãããŠããšãã«ã®ãŒçã«äžå®å®ãªconfigurationããåºçºããŠãç·©åããæ§çžãåŸãã1ã€ã®ãµã³ãã«ãèŠãå ŽåãR_gã倧ããç¶æ
ããå°ããç¶æ
ãžã®å€åã¯æ¥æ¿ã§ããããå
šäœãšããŠã¯ã2çš®é¡ã®ææ°é¢æ°çãªç·©åãããŠããããšãããããå§ãã¯ãR_gã倧ããç¶æ
ã§ç·©åããããç¹åŸŽçãªæé(MCS)ã®åŸãR_gãå°ããç¶æ
ã§ç·©åãè¡ãªãããšãããã£ãã(2)^3He-^4Heã®æ··åç©ããšã¢ãã²ã«äžã«ããå Žåã®æ§è³ªããBlumeãã®BEGã¢ãã«ã«ãããŠãååŠããã³ã·ã£ã«ãã©ã³ãã ãªå Žåã«å¯ŸããŠèšç®ãããFalicovãã®èšç®ã¯ãK=0ã®å Žåã§ãã£ãããæã
ã¯ãK>0ã®å Žååã³ç°æ¹æ§ã®ããå Žåã«é¢ããŠèšç®ãè¡ãªã£ãŠãããæã
ã¯K>0ã®å Žåã®çžå³ãåŸããããã«ãããšãKã倧ãããããšãs=±1ãšs=0ã亀äºã«äžŠã¶ãAF-likeãªçžãçŸããããŸãããšã¢ãã²ã«ã«ãã秩åºãã§ãããããšããåŸåã¯ãåäœäœå¹æKãããå Žåã§ãå€ãããªãããšãããã£ããç 究課é¡/é åçªå·:08226102, ç 究æé(幎床):1996åºå
žïŒç 究課é¡ããããããªããŒã®åœ¢ç¶ååžãšç·©åã®ç 究ã課é¡çªå·08226102ïŒKAKENïŒç§åŠç 究費å©æäºæ¥ããŒã¿ããŒã¹ïŒåœç«æ
å ±åŠç 究æïŒïŒ ïŒhttps://kaken.nii.ac.jp/ja/grant/KAKENHI-PROJECT-08226102/ïŒãå å·¥ããŠäœ
ããªããŒã®çµæ¶åãšã²ã«çžè»¢ç§»ã®ç 究
é沢倧åŠçåŠéšå¹³æ9幎床ã¯ãããªããŒã®ç§©åºåœ¢æã®ç 究ãšãã©ã³ãã åªè³ªäžã®ããªãŠã ã®æ§è³ªã®ç 究ãè¡ãªã£ãã以äžã«ãã®ææãå ±åããã(1)ããªããŒã®ç§©åºåœ¢æã®ç 究ã¿ãã³ã¢ã¶ã€ã¯ãŠã€ã«ã¹(TMV)ã«å€ç³é¡ãå ããæã®TMVã®ç§©åºåã«é¢ããŠã·ãã¥ã¬ãŒã·ã§ã³ãè¡ãªã£ãããã®åé¡ã¯ãè¬ã®è£œé ãšãé¢é£ããŠéèŠãªèª²é¡ã§ãããæã
ã¯ãŸããTMVãšå€ç³é¡ã®ç°¡åãªã¢ãã«ãäœã£ããããã³ã·ã£ã«ãšããŠã¯ãTMV-TMVããã³TMV-å€ç³é¡éã«ã¯hard-coreããã³ã·ã£ã«ãå€ç³-å€ç³éã«ã¯Lenard-Jonesããã³ã·ã£ã«ãçšãããç®±ã®å€§ãããå€åãããããšã«ããæ¿åºŠãå€ãããæã
ã¯ãé
åã®ç§©åºãã©ã¡-ã©ãx,y,zæ¹åã®ååŸååžé¢æ°ãèšç®ãããæ¿åºŠãäžããŠè¡ããšããŸãTMVãšå€ç³ã®çžåé¢ãèµ·ãããããã«æ¿åºŠãäžãããšãTMVã®nematicçžãèŠãããããšãããã£ããçµæãé£ç·ç ã®äœéæ°ãç©æ§ç ã®ä»äºæ°ãã®å®éšçµæãšæ¯èŒããããŸããæŸå±±æ°ãã®ååå Žè¿äŒŒãšæ¯èŒãè¡ãªã£ãã(2)è¶
æµåããªãŠã ã®ç 究aerogelãªã©ã®ã©ã³ãã ãªåªè³ªäžã«ããªãŠã ãå
¥ããå Žåã®æ§è³ªãèå³ãéããŠãããæã
ã¯ã2次å
ã©ã³ãã ãã-ãã¢ãã«ãçšããŠãéåã¢ã³ãã«ã«ãæ³ã§ãã®çŸè±¡ãç 究ããããã®çµæã1次å
ç³»ãšæ¯èŒããŠãã-ãºã¬ã©ã¹ã«ãªãã«ããããšãããã£ãããŸãã1æ¹åã«å£ãããå Žåãå£ã®é«ããããªãé«ãå Žåã§ããå£ãšåçŽãªæ¹åã®è¶
æµåæåãæ®ãããšãããã£ããããã¯éåå¹æã®ããã§ããããŸã1æ¹åã«æºãããå Žåã«ã¯ãè¶
æµåæåã¯ãæºã®æ·±ãã®éå調ãªé¢æ°ã§ããããšããããã2次å
ãã1次å
ãžã®ã¯ãã¹ãªãŒããŒãèå¯ãããç 究課é¡/é åçªå·:09212213, ç 究æé(幎床):1997åºå
žïŒç 究課é¡ãããªããŒã®çµæ¶åãšã²ã«çžè»¢ç§»ã®ç 究 ã課é¡çªå·09212213ïŒKAKENïŒç§åŠç 究費å©æäºæ¥ããŒã¿ããŒã¹ïŒåœç«æ
å ±åŠç 究æïŒïŒ ïŒhttps://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09212213/ïŒãå å·¥ããŠäœ
éåã¢ã³ãã«ã«ãæ³ãšéåã»ã«ãªãŒãããã³ã«ãããã³ãã«å¹æã®ç 究
é沢倧åŠçå·¥ç 究åå€å質åªè³ªäžã®ããªãŠã ã®è¶
æµå転移ã¯ãåªè³ªã®ä¹±ãã«ãããã®èšççæ¯èããä¹±ãããããã®ã¢ãã«ãšããŠãã©ã³ãã ããŸã³ãããŒãã¢ãã«ãçšããŠãéåã¢ã³ãã«ã«ãæ³ã«ãã£ãŠãè¶
æµåå¯åºŠãèšç®ãããæ¬ç 究ã§ã¯ãåã¢ãã«ã®åºåºç¶æ
ã®çžå³ã«æ³šç®ãããŸã次å
äŸåæ§ã«ã€ããŠãéåã¢ã³ãã«ã«ãã»ã·ãã¥ã¬ãŒã·ã§ã³ã«ããèå¯ãè¡ãªã£ãŠãããåŸæ¥è¡ãªãããŠããªã2次å
ç³»ã°ã©ã³ãã«ããã«ã«ã»ã¢ã³ãµã³ãã«ãçšããããçŸå®çãªèå¯ãå¯èœãšããŠããã次å
äŸåæ§ã«ã€ããŠã®çµæãããåºåºç¶æ
ã«ãããŠãäœæ¬¡å
ç³»ã»ã©ä¹±ãã«ããããŒãºç²åã®å±åšåããèµ·ããæãäºãå®éçã«ç€ºããããŸãããœããã³ã¢ããŸã³ç³»ã«ã€ããŠã®ã«ãŒãã¢ã«ãŽãªãºã ã®éçºããã®å¹çã®è©äŸ¡ãè¡ãªã£ããåã¢ã«ãŽãªãºã ã¯ãèšçç·©åçã«åœ±é¿ãããã¢ã³ãã«ã«ãã»ãµã³ããªã³ã°ãéæããããšããç¹åŸŽãæã€ãããœããã³ã¢ããŸã³ç³»ã«ã€ããŠã¯ãã®å¯Ÿç§°æ§ã«ãããçŸåšãŸã§é©çšãå°é£ã§ãããšãããŠãããæ¬ç 究ã§ã¯ãåã¢ã«ãŽãªãºã ã®æçãªç¹åŸŽã倱ãäºãªãããœããã³ã¢ããŸã³ç³»ã§ã®ã·ãã¥ã¬ãŒã·ã§ã³ãå¯èœãšããŠãããããã«ããä»åŸããœããã³ã¢ããŸã³ç³»ãšåæ§ãªå°é£ã䌎ãä»ã®å€ãã®ç³»ã«ã€ããŠãåæ¹æ³ã®é©çšã»æ¡åŒµã®å¯èœæ§ã瀺ããããç 究課é¡/é åçªå·:11166224, ç 究æé(幎床):1999åºå
žïŒãéåã¢ã³ãã«ã«ãæ³ãšéåã»ã«ãªãŒãããã³ã«ãããã³ãã«å¹æã®ç 究ãç 究ææå ±åæžã課é¡çªå·11166224ïŒKAKENïŒç§åŠç 究費å©æäºæ¥ããŒã¿ããŒã¹ïŒåœç«æ
å ±åŠç 究æïŒïŒïŒhttps://kaken.nii.ac.jp/ja/grant/KAKENHI-PROJECT-11166224/)ãå å·¥ããŠäœ
é害ç©ã®ããç°å¢ã§ã®ããªããŒç³»ã®ã·ãã¥ã¬ãŒã·ã§ã³ãšçäœãžã®å¿çš
é沢倧åŠçå·¥ç 究åé害ç©ã®ããç°å¢ã§ã®ç²åãããªããŒã®æ¡æ£ã¯ãçäœå
ã§ã®ç©è³ªäŒéãã¬ã³ã®è»¢ç§»ãšãé¢ä¿ããŠããŠãéèŠãªåé¡ã§ãããæã
ã¯ããã¢ã«ãã³é
žæº¶æ¶²äžã®æ¡æ£ã«é¢ããMasudaãã®å®éšã«çç®ããããã¢ã«ãã³é
žäžã®çæ¹çç²åããã³ããªããŒã®æ¡æ£ãããã©ãŠãã¢ã³ãã€ããã¯ã¹ã®ææ³ã§ç 究ãããé·è·é¢æ¡æ£ãçè·é¢æ¡æ£ã«æ¯ã¹ãŠãæ¡æ£å®æ°ãå°ãããªããšããå®éšçµæãã·ãã¥ã¬ãŒã·ã§ã³ã§åçŸããããšãã§ãããããã«ãæ¡æ£å®æ°ã¯æž©åºŠäžæã«äŒŽãå¢å ããããäžå®æž©åºŠã§å転ããããšãããã£ãããã¢ã«ãã³é
žãåºå®ããå Žåã¯ããã®æ¡æ£å®æ°ã®å転ã¯èŠãããªããæ¡æ£å®æ°ã®å転ã¯ããã¢ã«ãã³é
žãé«æž©ã§éåã掻çºã«ãªããæ¡æ£ç²åã®éåãé»å®³ããããã§ãããå®éšã§ã¯ãã¢ã«ãã³é
žã®ååšã«ããæ¡æ£å®æ°ã¯30%çšåºŠæžå°ãããäžæ¹ãã·ãã¥ã¬ãŒã·ã§ã³ã§ã¯90%ã®æžå°ã§ãããããã¯2ã€ã®èŠå ãèããããã第1ã«ãå®éã®ãã¢ã«ãã³é
žããã倪ãéã®ã¢ãã«ã䜿ã£ãŠãããããã¯ãã¢ã«ãã³é
žã®åœ±é¿ã倧ããé åãæå³çã«éžãã§ããããã§ããã第2ã«ãå®éã®ç³»ã§ã¯ç¶²ç®ãã©ã³ãã ã«ååžããŠããããã·ãã¥ã¬ãŒã·ã§ã³ã§ã¯èŠåçãªæ§é ã®å Žåãæ±ã£ãŠãããã©ã³ãã ãªå Žåã¯ã網ç®ã®ã¹ã±ãŒã«ã«ããããããã倧ãããããæãæ¡æ£ããŠããã®ã§ãæ¡æ£å®æ°ã¯å€§ããã«ãªããã©ã³ãã ãªå Žåã®èšç®ã¯ä»åŸã®èª²é¡ã§ãããããªããŒã®æ¡æ£ã®å Žåã¯ãæ
£æ§ååŸã«ããéåã«éããèŠããããå³ã¡ãæ
£æ§ååŸã倧ããå Žåã¯è»žæ¹åã«éåããããããæ
£æ§ååŸãå°ããäžžãŸã£ãåŸåã«ããæã¯ããã¢ã«ãã³é
žã®ç¶²ç®ã«ã²ã£ããããæ¡æ£ãã«ãããããã«ãæµããããå Žåã®æ¡æ£ã¯ã²ã«é»æ°æ³³åãšãé¢é£ããŠããŠèå³æ·±ããããªããŒã圢ç¶ãå€ããªããåããŠããæ§åãçŸåšèšç®äžã§ãããç 究課é¡/é åçªå·:14045268, ç 究æé(幎床):2002 â 2003åºå
žïŒãé害ç©ã®ããç°å¢ã§ã®ããªããŒç³»ã®ã·ãã¥ã¬ãŒã·ã§ã³ãšçäœãžã®å¿çšãç 究ææå ±åæžã課é¡çªå·14045268ïŒKAKENïŒç§åŠç 究費å©æäºæ¥ããŒã¿ããŒã¹ïŒåœç«æ
å ±åŠç 究æïŒïŒïŒhttps://kaken.nii.ac.jp/ja/grant/KAKENHI-PROJECT-14045268/)ãå å·¥ããŠäœ
ãããããªããŒã®ç©æ§ãšprotein foldingãžã®å¿çš
é沢倧åŠçåŠéšãããããªããŒã®ç©æ§ã¯ãã¿ã³ãã¯è³ªã®foldingã®åé¡ãšãé¢é£ããŠãããèå³æ·±ããããã§ã¯stickerãæã€ããªããŒã«é¢ããŠãã«ãã«ããã«ã«ã»ã¢ã³ãã«ã«ãæ³ãçšããŠå¹³è¡¡ç¶æ
ã®configurationã«ã€ããŠç 究ãããã¢ãã«ãšããŠã¯ã2次å
æ£æ¹æ Œåäžã«ããªããŒãé
眮ãããåŒåãåãstickerãããªããŒäžã«çééã«ãããšãããã¢ãããŒãåããã¢ã«ãŽãªãºã ã«ã¯ãbond fluctuation methodãæ¡çšãããstickeréã®çžäºäœçšã¯ãæè¿æ¥ã®æã«âu(u>0),次è¿æ¥ã®å Žåã«âu/2,ãã以å€ã®å Žåã¯ãŒããšããã2ã€stickerãçµåããå Žåã«ãã以äžçµåã§ããªãã¢ãã«ãããããããã§ã¯è€æ°åã®stickerã®çµåãèš±ãã¢ãã«ãèãããstickeréã®çµåãšãã«ã®ãŒã«æ¯ã¹ãŠã枩床ãåçšåºŠãŸãã¯äœãå Žåãæ®éã®ã¡ããããªã¹æ³ã§ã¯äœçžç©ºéã®å±æå®å®ãªæã«ç¶æ
ãæãŸã£ãŠããŸã£ãŠãæãåºãã®ã«æéããããããã®åé¡ãåé¿ããããã«ãBergãã®ãã«ãã«ããã«ã«ã»ã¢ã³ãã«ã«ãæ³ãçšãããæ
£æ§ååŸã®ã¹ã±ãŒãªã³ã°ææ°ã«é¢ããŠã¯ãçžäºäœçšã®åœ±é¿ã§ãäžæ§ããªããŒã«æ¯ã¹ãŠå°ããå€ãåŸãããããŸããæ
£æ§ååŸã®ååžã«ã€ããŠã¯ãäœæž©ã§ã¯ãå
šéšã®stickerãéãŸã£ãç¶æ
ã§å°ããååŸã®æã«éãããŒã¯ãæã£ãŠãããé«æž©ã§ã¯å€§ããååŸã®æã«åºãããŒã¯ã«ãªã£ãŠãããäžéã®æž©åºŠã§ãäž¡è
ã®å
±åç¶æ
ã«ãªã£ãŠãããã¢ã³ãã«ã«ãã¹ããããé²ãã«ã€ããŠãäž¡æ¹ã®ç¶æ
ãè¡ã£ããæ¥ããããŠããããŸããã®ã¢ãã«ã§ã¢ãããŒæ°ãå€ããªããšã転移枩床ã¯äœããªãåŸåãã¿ããããååŸååžã®2ã€ã®ããŒã¯ã¯ãDNAã®å®éšã§ã確èªãããŠãããDNAã®å Žåã¯ãã¯ãŒãã³åãªã©é·è·é¢çžäºäœçšããããéãé·ãããä»åã®ãããªçè·é¢çžäºäœçšã®ã¢ãã«ã§ãåæ§ã®çŸè±¡ãèŠãããããšã¯èå³æ·±ããç 究課é¡/é åçªå·:07236216, ç 究æé(幎床):1995åºå
žïŒç 究課é¡ããããããªããŒã®ç©æ§ãšprotein foldingãžã®å¿çšã課é¡çªå·07236216ïŒKAKENïŒç§åŠç 究費å©æäºæ¥ããŒã¿ããŒã¹ïŒåœç«æ
å ±åŠç 究æïŒïŒ ïŒhttps://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07236216/ïŒãå å·¥ããŠäœ
Studies on Constituents of Medicinal Plants. XXIII. Constituents of the Vines of Menispermum dauricum DC. (2)
é沢倧åŠå€§åŠé¢èªç¶ç§åŠç 究ç§ååäœçšåŠé沢倧åŠè¬åŠéšA new oxoisoaporphine-type compound, named dauriporphine, was isolated from the vines of Menispermum dauricum DC. (Menispermaceac) and the structure of this compound was elucidated as 4,5,6,9-tetramethoxy-7H-dibenzo[de,h]quinolin-7-one(I)
Coarse-grained Simulation of Azurin Crystal Complex System: Proteinâprotein Interactions
Most of protein function analyses focus mainly on the physical properties of a sin-gle protein. Nevertheless, the environments where proteins perform their biological functions are crowded with macromolecules, such as lipid, nucleic acids, and other proteins. The interactions between macromolecules may be aï¬ected by molecular crowding. Therefore, as an initial step we here investigate the proteinâprotein interactions for gaining insights into molecular crowding eï¬ects on protein conformational changes. Computational molecular simulation is one of the useful and important tools to study the protein interactions. Here we develop a coarse-grained model and a topology-based potential interactions to simulate dynamical properties of multiprotein complex crys-tal structure. We apply them to simulate complex crystal structure of Pseudomonas Aeruginosa azurin, a small cupredoxin, which functions as an electron carrier in bacterial respiration. Since electron transfer on azurin plays an important role in the biological system, it is important to cha-racterize the protein interactions in azurin. In our simulation, the interactions between intra- and inter- domains are treated at the residue level with the implementation of the oï¬ lattice G¯o-like model. In each domain, bonded interactions between residues are described by bond stretching, bond angle bending, and torsional angle potentials. The non-bonded interactions, which are repre-sented by short range and long range potentials, describe the interactions both among residues and between proteins. We probe the proteinâprotein interactions by analyzing the protein binding. A simple clustering algorithm is applied to group the bound structures of protein complex. Moreover, we can investigate the importance of the long range interaction on the multiprotein complex system. These studies will serve as valuable insights for further investigation on molecular crowding eï¬ects
Adhesion of nanoparticles to vesicles: a Brownian dynamics simulation.
We studied the interaction of bilayer vesicles and adhesive nanoparticles using a Brownian dynamics simulation. The nanoparticles are simple models of proteins or colloids. The adhering nanoparticle induces the morphological change of the vesicle: budding, formation of two vesicles in which only outer monolayers are connected, and fission. We also show that the nanoparticle promotes the fusion process: fusion-pore opening from a stalk intermediate, a neck-like structure that only connects outer monolayers of two vesicles. The nanoparticle bends the stalk, and induces the pore opening