搜索结果: 1-15 共查到“分析化学 Raman”相关记录27条 . 查询时间(0.078 秒)
FTIR and Resonance Raman Studies of Nitric Oxide Binding to H93G Cavity Mutants of Myoglobin
Animals Nitric Oxide Imidazoles Myoglobin Enzyme Inhibitors Free Radical Scavengers Spectroscopy, Fourier Transform Infrared Spectrum Analysis, Raman Binding Sites Molecular Structure
2016/5/23
Nitric oxide (NO) binds to the myoglobin (Mb) cavity mutant, H93G, forming either a five- or six-coordinate Fe-NO complex. The H93G mutation eliminates the covalent attachment between the protein and ...
Electronic and Nuclear Dynamics of the Accessory Bacteriochlorophylls in Bacterial Photosynthetic Reaction Centers from Resonance Raman Intensities
chemistry biology and medicine,basic studies chlorophyll raman spectra photosynthetic bacteria scattering energy transfer absorption spectra dynamics photosynthetic reaction centers
2016/5/23
Resonance Raman spectra and absolute Raman scattering intensities of the Franck-Condon coupled vibrational modes of the accessory bacteriochloropyhlls (B) in the photosynthetic reaction center from Rb...
Near-Infrared Resonance Raman Spectroscopy of the Special Pair and the Accessory Bacteriochlorophylls in Photosynthetic Reaction Centers
Near-Infrared Resonance Raman Spectroscopy Accessory Bacteriochlorophylls Photosynthetic Reaction Centers
2016/5/23
Rapid-flow resonance Raman spectra of the primary electron donor (a bacteriochlorophyll dimer known as P) and of the monomeric accessory bacteriochlorophylls (B) in the bacterial photosynthetic reacti...
Discrimination of color copier/laser printer toners by Raman spectroscopy and subsequent chemometric analysis
Forensics Raman Color Toners Chemometrics
2015/5/21
Toner analysis has become an area of increased interest due to the wide availability of laser printers and photocopiers. Toner is most often encountered on paper in questioned document analysis. Becau...
Surface-Enhanced Raman Scattering of 4-Aminothiophenol Adsorbed on Silver Nanosheets Deposited onto Cubic Boron Nitride Films
Surface-Enhanced Raman Scattering 4-Aminothiophenol Adsorbed Silver Nanosheets Deposited
2010/9/17
A simple method was found for the fabrication of silver nanosheets (AgNS) by the catalysis of gold nanoparticles (AuNP) on an amine-terminated cubic boron nitride (cBN) surface deposited on a Si(001) ...
Optimized Surface-enhanced Raman Scattering (SERS) Colloids for the Characterization of Microorganisms
Surface-enhanced Raman Scattering Colloids Characterization
2010/9/14
We report on a comparison of silver colloid preparation methods for the in situ analysis of microorganisms based on surface-enhanced Raman scattering (SERS). Different colloid sols were tested and opt...
Redox Cycling Effect on the Surface-enhanced Raman Scattering Signal of Crystal Violet Molecules at Nanostructured Interdigitated Array Electrodes
Redox Cycling the Surface-enhanced Raman Scattering Signal Crystal Violet Molecules
2010/9/16
Nanostructured interdigitated array (IDA) electrodes with different inter-electrode spacing were demonstrated to improve the detection sensitivity of short-lived electroactive species and to follow in...
Development of Interdigitated Array Electrodes with Surface-enhanced Raman Scattering Functionality
Interdigitated Array Electrodes Surface-enhanced Raman Scattering Functionality
2010/9/16
Interdigitated array electrodes with surface-enhanced Raman scattering (SERS) functionality for in situ qualitative and quantitative analysis of electroactive species are demonstrated. Gold nanostruc...
Nd∶Y3Al5O12单晶及纳米粉体的Raman光谱分析
Nd∶YAG 纳米粉体 Raman光谱
2009/10/26
测量了YAG(Y3Al5O12)/Nd∶YAG单晶、Nd∶YAG前驱物及其在不同温度下煅烧获得粉体的拉曼光谱，对谱峰的振动模式进行了指认，对结果进行了分析。Nd∶YAG前驱物在煅烧时，有一个由非晶态向晶态的转化过程;700 ℃下烧结前驱物获得非晶态产物的结构中含有AlO4四面体结构;随着煅烧温度的升高，拉曼光谱的变化主要表现在两个方面：一是谱峰半高宽(FWHM)减小，谱峰强度增大;二是一些拉曼光谱...
γ-Al2O3高温相变的XRD和Raman光谱比较研究
高温相变 XRD Raman光谱
2009/10/26
采用XRD和Raman光谱研究了γ-Al2O3的高温相变。Raman结果表明，位于1 175，1 241 cm-1和1 370，1 400 cm-1的2组谱峰是杂质Fe3+和(或)Cr3+在θ-Al2O3和α-Al2O3环境中产生的荧光光谱，用这2组峰来指认θ-Al2O3和α-Al2O3物相比XRD更灵敏。因此，Raman技术能高灵敏地表征γ-Al2O3的高温相变过程。结果表明γ-Al2O3从80...
高压下NaCl水溶液的Raman光谱不连续性的证据
NaCl水溶液 氢键 高压
2009/10/26
在温度21 ℃和压力50～1 100 MPa范围内利用碳化硅压腔进行了10％的NaCl水溶液的Raman光谱的原位测量和研究。研究发现：溶液的Raman拟合谱峰在50～300 MPa压力范围内，随着压力的增加向低波数方向移动，在约300 MPa时达到最小值;在300～800 MPa压力范围内，压力的升高则导致谱峰向高波数方向移动，在约800 MPa时达到最大值;随着压力的进一步升高(＞800 MP...
铝硅酸盐Raman活性分子振动解析
铝硅酸盐Raman光谱 矿物晶体 结构模型
2009/10/26
分别测定了蓝晶石、红柱石和硅线石三种铝硅酸盐天然矿物晶体以及K2O-Al2O3-SiO2三元铝硅酸盐玻璃的Raman光谱。构建了一组硅铝四面体聚集体结构模型，采用量子化学自洽场分子轨道从头计算的方法计算了其Raman振动频率。分析研究了上述Raman光谱振动特征，确定了特征谱峰的归属，解析了铝对铝硅酸盐Raman活性分子振动特征的影响。结果表明，随四配位铝的增加，导致800～1 200 cm-1波...
单、双掺钒酸钇晶体的Raman光谱与能量转移研究
Tm3+∶Ho3+∶YVO4 拉曼光谱 能量转移
2009/5/5
文章采用双光栅单色仪(HRD-1), 氩离子激光器的488.0 nm波长激发，分别测得室温下，激发光平行、垂直晶体c轴入射时，Tm3+,Ho3+单掺和双掺钒酸钇晶体的拉曼光谱，对检测结果进行分析并探讨了对能量转移的影响。观测到对Ho3+∶YVO4,激发光垂直c轴时的散射光强明显强于激发光平行c轴时的散射光强;由于488.0 nm波长靠近Ho3+的一个吸收峰，吸收和散射相互竞争，使475 cm-1被...
以Ar作压力介质，在准静水压力条件下，利用激光加热DAC技术和显微Raman光谱原位测试技术，在0～35 GPa压力范围开展金红石的高温高压相变研究。在室温条件下，金红石结构TiO2于13.4 GPa开始转变成斜锆石相，于21 GPa时转变完全，并直到35 GPa时斜锆石相稳定存在。在压力分别为29.4和35.0 GPa时，用YAG激光器发出的波长为1.064 μm的红外激光束扫描加热样品，TiO...