Grant-in-Aid for international Scientific Research
|Allocation Type||Single-year Grants|
|Research Institution||TOHOKU UNIVERSITY|
KOMATSU Hiroshi Institute for Materials Research, Tohoku University, Professor, 金属材料研究所, 教授 (00108565)
THOMAS Bill Center for Microgravity and Materials Research, University of Alabama, マイクログラビティーセンター, 助手
MUSCHOL Mart アラバマ大学, マイクログラビティーセンター, 助手
VEKILOV Peter Center for Microgravity and Materials Research, University of Alabama, マイクログラビティーセンター, 助手
ROSENBERGER Franz Center for Microgravity and Materials Research, University of Alabama, マイクログラビティーセンター, 教授
SAZAKI Gen Institute for Materials Research, Tohoku University, 金属材料研究所, 助手 (60261509)
NAKADA Toshitaka Institute for Materials Research, Tohoku University, 金属材料研究所, 助手 (20237308)
MIYASHITA Satoru Institute for Materials Research, Tohoku University, 金属材料研究所, 助手 (00219776)
OBINATA Masuo Institute of development Aging and Cancer, Tohoku Univ., 加齢医学研究所, 教授 (10099971)
MUSHOL Martin Center for Microgravity and Materials Research, University of Alabama
FRANZ Rosenb アラバマ大学マイクログラビティーセンター, 教授
|Project Period (FY)
1995 – 1996
Completed(Fiscal Year 1996)
|Budget Amount *help
¥9,200,000 (Direct Cost : ¥9,200,000)
Fiscal Year 1996 : ¥4,300,000 (Direct Cost : ¥4,300,000)
Fiscal Year 1995 : ¥4,900,000 (Direct Cost : ¥4,900,000)
|Keywords||proteins / lysozyme / crystal growth / impurity effect / two beam interferometry / light scattering / solubility / effect of magnetic field / タンパク質 / 濃度分布|
Achievements of this year are as follows ;
1. The Japanese group (J-group) measured solubilities of tetragonal, orthorhombic and triclinic form of hen egg white lysozyme (HEW lysozyme) using two beam interferometry.
2. J-group developed an interferometic method to measure the refractive index inside crystals (HEW lysozyme).
3. J-group got highly purified HEW lysozyme samples using HPLC.With this sample, they observed crystal interfaces using atomic force microscopy. This result was discussed with the American group (A-group) comparing with A-group's result.
4. J-group tried to perform crystallization of HEW lysozyme in a high magnetic field. And they found that it could control the nucleation rate and orientation of crystals.
5. Appoferritin (A-group) and ferritin (J-group) were highly purified and then crystallized. They showed again that removement of impurities is indispensable for growth of crystals of high quality. J-group made a morphodrom of ferritin.
6. A-group performed light scatte
ring experiments of HEW lysozyme solution and discuss the aggregation process. They estimated the second virial coefficient of the solution and discussed relation between ion intensity and intermolecular interaction.
7. A-group precisely measured topography of vicinal surface with use of the laser interferometry and obtained time evolution of normal and step growth rates and slope of the vicinal surfaces.
8. A-group found that there existed a region where HEW lysozyme solution separated into two liquid phases. They made a phase diagram for this segregation with use of the light scattering technique.
9. In order to estimate the solution layr thickness where convection is ignored, A-grup performed computer simulation of the concentration profiles around a growing crystal changing thickness of the solution layr. J-group measured concentration profiles around a growing lysozyme crystal changing the thickness of the cell. These results were compared each other.
10. J-group measured solubility of HEW lysozyme in situ in high pressure. Pressure dependence of the growth rate was also studied. Less