The effect of rare earth ion Er 3+ on myoglobin(Mb) was studied by using Resonance Raman spectroscopy. The results show that with the variation of Er 3+ concentrations, both the oxidation state and spin state of Mb ar...The effect of rare earth ion Er 3+ on myoglobin(Mb) was studied by using Resonance Raman spectroscopy. The results show that with the variation of Er 3+ concentrations, both the oxidation state and spin state of Mb are sensitive to the perturbation of Er 3+ . Er 3+ added to Mb affects the oxidation and spin state synchronously. The structure sensitive groups of Mb are more accessible to the Er 3+ than other groups. According to the fluorometry and CD spectra studied and our results as mentioned above, we considered that Er 3+ does not interact with heme directly, and Er 3+ probably leads to the conformational changes of Mb due to the change of oxidation and spin state of Heme. [WT5HZ]展开更多
O433.4 2000031588表面增强喇曼光谱在非水平体系中的研究进展=Progress in surface enhanced Raman spectroscopicstudies in nonaqueous systems[刊,中]/顾仁敖(苏州大学化学系.江苏,苏州(215006)),曹佩根,姚建林(厦门大学固体表面物...O433.4 2000031588表面增强喇曼光谱在非水平体系中的研究进展=Progress in surface enhanced Raman spectroscopicstudies in nonaqueous systems[刊,中]/顾仁敖(苏州大学化学系.江苏,苏州(215006)),曹佩根,姚建林(厦门大学固体表面物理化学系国家重点实验室.福建,厦门(361005))//光谱学与光谱分析.—1999,19(4).—531-534论述了表面增强喇曼光谱(SERS)展开更多
The relaxation oscillation characteristics of a resonant tunneling diode （RTD） with applied pressure are reported. The oscillation circuit is simulated and designed by Pspice 8. 0, and the measured oscillation frequ...The relaxation oscillation characteristics of a resonant tunneling diode （RTD） with applied pressure are reported. The oscillation circuit is simulated and designed by Pspice 8. 0, and the measured oscillation frequency is up to 200kHz. Using molecular beam epitaxy （MBE） ,AIAs/lnx Ga1-x As/GaAs double barrier resonant tunneling structures （DBRTS） are grown on （100） semi-insulated （SI） GaAs substrate,and the RTD is processed by Au/Ge/Ni/Au metallization and an airbridge structure. Because of the piezoresistive effect of RTD,with Raman spectrum to measure the applied pressure, the relaxation oscillation characteristics have been studied, which show that the relaxation oscillation frequency has approxi- mately a - 17.9kHz/MPa change.展开更多
O432.3//C657.3 2003020813大肠杆菌的直接比色检测及其机理=Direct colorimetricdetection for escherichia coli and its mechanism[刊,中]/马保亮(中科院长春光机所激发态物理开放研究实验室.吉林,长春(13002 1)),范翊…//发光学报.-...O432.3//C657.3 2003020813大肠杆菌的直接比色检测及其机理=Direct colorimetricdetection for escherichia coli and its mechanism[刊,中]/马保亮(中科院长春光机所激发态物理开放研究实验室.吉林,长春(13002 1)),范翊…//发光学报.-2002,23(2).-186-190带有甘露糖的聚双炔薄膜能够识别大肠杆菌并与它们结合,可以导致聚双炔薄膜的颜色发生改变,这种颜色变化很容易用裸眼观察到并且可以通过可见吸收光谱定量分析。为了理解颜色变化的机理。展开更多
The structural and vibrational properties of two-dimensional hexagonal silicon （silicene） and germanium （germanene） are investigated by means of first-principles calculations. It is predicted that the silicene （g...The structural and vibrational properties of two-dimensional hexagonal silicon （silicene） and germanium （germanene） are investigated by means of first-principles calculations. It is predicted that the silicene （germanene） structure with a small buckling of 0.44 ,~ （0.7/k） and bond lengths of 2.28 ,~ （2.44 .~） is energetically the most favorable, and it does not exhibit imaginary phonon mode. The calculated non-resonance Raman spectra of silicene are characterized by a main peak at about 575 cm-1, namely the G-like peak. For germanene, the highest peak is at about 290 cm-1. Extensive calculations on armchair silicene nanoribbons and armchair germanene nanoribbons are also performed, with and without hydrogenation of the edges. The studies reveal other Raman peaks mainly distributed at lower frequencies than the G-like peak which could be attributed to the defects at the edges of the ribbons, thus not present in the Raman spectra of non-defective silicene and germanene. Particularly the Raman peak corresponding to the D mode is found to be located at around 515 cm-1 for silicene and 270 cm-1 for germanene. The calculated G-like and the D peaks are likely the fingerprints of the Raman spectra of the low-buckled structures of silicene and germanene.展开更多
文摘The effect of rare earth ion Er 3+ on myoglobin(Mb) was studied by using Resonance Raman spectroscopy. The results show that with the variation of Er 3+ concentrations, both the oxidation state and spin state of Mb are sensitive to the perturbation of Er 3+ . Er 3+ added to Mb affects the oxidation and spin state synchronously. The structure sensitive groups of Mb are more accessible to the Er 3+ than other groups. According to the fluorometry and CD spectra studied and our results as mentioned above, we considered that Er 3+ does not interact with heme directly, and Er 3+ probably leads to the conformational changes of Mb due to the change of oxidation and spin state of Heme. [WT5HZ]
文摘O433.4 2000031588表面增强喇曼光谱在非水平体系中的研究进展=Progress in surface enhanced Raman spectroscopicstudies in nonaqueous systems[刊,中]/顾仁敖(苏州大学化学系.江苏,苏州(215006)),曹佩根,姚建林(厦门大学固体表面物理化学系国家重点实验室.福建,厦门(361005))//光谱学与光谱分析.—1999,19(4).—531-534论述了表面增强喇曼光谱(SERS)
文摘The relaxation oscillation characteristics of a resonant tunneling diode （RTD） with applied pressure are reported. The oscillation circuit is simulated and designed by Pspice 8. 0, and the measured oscillation frequency is up to 200kHz. Using molecular beam epitaxy （MBE） ,AIAs/lnx Ga1-x As/GaAs double barrier resonant tunneling structures （DBRTS） are grown on （100） semi-insulated （SI） GaAs substrate,and the RTD is processed by Au/Ge/Ni/Au metallization and an airbridge structure. Because of the piezoresistive effect of RTD,with Raman spectrum to measure the applied pressure, the relaxation oscillation characteristics have been studied, which show that the relaxation oscillation frequency has approxi- mately a - 17.9kHz/MPa change.
文摘O432.3//C657.3 2003020813大肠杆菌的直接比色检测及其机理=Direct colorimetricdetection for escherichia coli and its mechanism[刊,中]/马保亮(中科院长春光机所激发态物理开放研究实验室.吉林,长春(13002 1)),范翊…//发光学报.-2002,23(2).-186-190带有甘露糖的聚双炔薄膜能够识别大肠杆菌并与它们结合,可以导致聚双炔薄膜的颜色发生改变,这种颜色变化很容易用裸眼观察到并且可以通过可见吸收光谱定量分析。为了理解颜色变化的机理。
文摘The structural and vibrational properties of two-dimensional hexagonal silicon （silicene） and germanium （germanene） are investigated by means of first-principles calculations. It is predicted that the silicene （germanene） structure with a small buckling of 0.44 ,~ （0.7/k） and bond lengths of 2.28 ,~ （2.44 .~） is energetically the most favorable, and it does not exhibit imaginary phonon mode. The calculated non-resonance Raman spectra of silicene are characterized by a main peak at about 575 cm-1, namely the G-like peak. For germanene, the highest peak is at about 290 cm-1. Extensive calculations on armchair silicene nanoribbons and armchair germanene nanoribbons are also performed, with and without hydrogenation of the edges. The studies reveal other Raman peaks mainly distributed at lower frequencies than the G-like peak which could be attributed to the defects at the edges of the ribbons, thus not present in the Raman spectra of non-defective silicene and germanene. Particularly the Raman peak corresponding to the D mode is found to be located at around 515 cm-1 for silicene and 270 cm-1 for germanene. The calculated G-like and the D peaks are likely the fingerprints of the Raman spectra of the low-buckled structures of silicene and germanene.
