搜索结果: 1-15 共查到“理学 FTIR”相关记录194条 . 查询时间(0.193 秒)
傅里叶变换红外显微光谱（Micro-FTIR）和X射线衍射（XRD）用于测定棉花结晶度效果比较
陆地棉 海岛棉 显微傅里叶变换红外光谱 X射线衍射 结晶度
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2021/1/11
【目的】使用傅里叶变换红外显微光谱（Micro-Fourier transform infrared spectroscopy, micro-FTIR）结合X射线衍射（X-ray diffraction, XRD）方法研究2个不同品系发育中棉纤维的纤维素结晶度（Crystalline index, CI）变化，验证micro-FTIR法测定发育中棉花纤维素CI的可行性，并用此方法对成熟棉花纤维素C...
温度对死后大鼠肾组织FTIR光谱特征的影响
法医病理学 谱学傅里叶变换红外 主成分分析 偏最小二乘法 死亡时间 温度 肾 大鼠
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2019/4/25
分析大鼠死后肾组织在不同温度下的傅里叶变换红外（Fourier transform infrared，FTIR）光谱数据，探究温度对死后大鼠肾组织FTIR光谱特征的影响。 方法 大鼠颈椎脱臼处死后置于4 ℃、20 ℃和30 ℃环境中，于不同时间点提取大鼠肾组织，采集FTIR光谱数据，并利用数据挖掘技术对数据进行分析。 结果 4 ℃、20 ℃和30 ℃环境组中部分时间点样本主成分分析结果具有明显聚类...
FTIR光谱仪中傅里叶插值采样方法的研究
采样方法 傅里叶变换红外光谱仪 " Brault" 方法 傅里叶插值 过采样
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2018/3/7
为解决传统"Brault"采样方法中参考信号过零点计算复杂、耗时较多的问题，提出了基于傅里叶插值技术寻找过零点的方法。通过与其他插值方法进行比较研究，结果表明，这种方法确保了过零点信息准确性的同时简化了数据处理的复杂度，得到的过零点信息线性拟合系数大于0.999。在2 100~2 200 cm-1波段范围内，当参考激光信号误差较小时，傅里叶插值方法得到的仪器SNR是三次样条插值法所得到的1.03倍...
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
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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 ...
应用TG-FTIR技术研究黄土庙煤催化热解特性
黄土庙(HTM)煤 催化热解 动力学分析 MOx/USY TG-FTIR
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2014/4/14
用浸渍法制备过渡金属氧化物担载型催化剂MOx/USY(M=Co、Mo、Co-Mo),用热重红外联用技术考察了MOx/USY催化剂对黄土庙(HTM)煤热解失重特性和热解产物生成规律的影响。热重实验结果表明,MOx/USY催化剂可使HTM煤热解的二次脱气条件更为温和,热解峰温分别提前14、23和9℃。动力学分析结果表明,MOx/USY催化剂可降低HTM煤样热解的活化能。FT-IR研究表明,MOx/US...
IR color separation in transmission through gratings on (110) silicon: FTIR experiment versus theory
IR color separation transmission through gratings (110) silicon FTIR experiment versus theory Optics
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2012/4/19
The phenomenon of filtering in zero-diffraction order is studied for transmission through 1D-periodic structures on a silicon wafer. Our study combines FTIR spectrometry in the range from 2.5 to 25 mi...
Praying Mantis as a Difuse Reflectance Device for FTIR Analysis of Geophagic Clayey Soils
Praying Mantis Difuse Reflectance Device FTIR Analysis Geophagic Clayey Soils
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2012/3/14
Praying Mantis as a Difuse Reflectance Device for FTIR Analysis of Geophagic Clayey Soils.
FTIR spectroscopic study of palygorskite: Influence of the composition of the octahedral sheet
Palygorskite FTIR spectroscopy Structural formulae Octahedral sheet
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2011/11/4
The influence of chemical composition to position and intensity of the absorption bands observed in the FTIR spectra of palygorskite has been studied by a detailed comparative study of six samples. Pa...
First ground-based FTIR observations of methane in the inner tropics over several years
First ground-based FTIR observations methane the inner tropics
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2010/8/16
Total column concentrations of methane have been retrieved from ground-based solar absorption FTIR spectra in the near-infrared recorded in Paramaribo (Suriname). The methane FTIR observations are com...
The ground-based FTIR network's potential for investigating the atmospheric water cycle
The ground-based FTIR network's potential the atmospheric water cycle
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2010/8/12
We present tropospheric H216O and HD16O/H216O vapour profiles measured by ground-based FTIR (Fourier Transform Infrared) spectrometers between 1996 and 2008 at a northern hemispheric subarctic and sub...
基于模糊聚类分析和曲线拟合的FTIR不同产地鸡骨草、毛鸡骨草鉴别分析
傅里叶变换红外光谱 模糊聚类分析 相似度 相异度 曲线拟合
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2010/6/24
利用傅里叶变换红外光谱技术结合模糊聚类分析法和曲线拟合对鸡骨草、毛鸡骨草进行产地鉴别。选用曼哈顿距离单位计算的相异度聚类分析结果最优，5个产地鸡骨草都可完全区分开来，毛鸡骨草则只能鉴别出3个产地，南宁和钦州2个产地发生重叠;为了进一步鉴别不同产地鸡骨草和毛鸡骨草，对鸡骨草和毛鸡骨草平均红外谱图中1 034 cm-1吸收峰进行曲线拟合，野生鸡骨草拟合出11个子峰，其他各产地鸡骨草均只能拟合出9个子峰...
不同产地双色牛肝菌FTIR光谱鉴别研究
双色牛肝菌 傅里叶变换红外光谱 主成分分析 鉴别分类
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2010/6/24
同一种蕈菌子实体，由于外观形貌相似，凭传统外观形貌特征难以鉴别产地来源。应用傅里叶变换红外光谱(FTIR)法测定了云南省5个不同地区58个野生双色牛肝菌子实体样品的红外光谱。借助于红外光谱具有的指纹特性，利用SPSS 13.0统计软件对1 350～750 cm-1范围光谱数据进行主成分分析(PCA)，根据前三个主成分累积贡献率已达到88.87％以及主成分载荷分析，表明前三个主成分能够反映样品在该段...
研究了不同病理生理状态的胆囊组织、胆囊组织细胞膜及胆囊癌细胞株的傅里叶变换红外光谱的相关性. 结果显示, 与正常组织比较, 胆囊癌组织中脂质相关谱带(2955, 2920, 2870, 2850和1740 cm-1)与蛋白相关谱带(1550 cm-1)强度降低; 胆囊癌细胞株中脂质相关谱带与蛋白相关谱带(1550 cm-1)强度明显增加; 胆囊癌组织细胞膜中脂质相关谱带强度明显增加; 核酸相关吸收...
T-Jump/FTIR技术研究3,4-二硝基呋咱基氧化呋咱快速热裂解
快速热分解 T-Jump/FTIR DNTF 压强
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2010/3/9
采用温度快速跃迁原位池与快速扫描傅里叶变换红外联用(T-Jump/FTIR)技术在0.1-0.4 MPa 压强范围内研究了3,4-二硝基呋咱基氧化呋咱(DNTF)的快速热裂解. 试验是以1000 ℃·s-1的升温速率在800和1000 ℃的温度下进行, 用快速扫描傅里叶变换红外光谱实时跟踪分析DNTF裂解的气相产物. 结果表明, DNTF快速热裂解的主要产物CO、CO2、NO和NO2的相对摩尔浓度...
Ground-based FTIR and MAX-DOAS observations of formaldehyde at Réunion Island and comparisons with satellite and model data
Ground-based FTIR MAX-DOAS observations formaldehyde Réunion Island
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2009/12/31
Formaldehyde (HCHO) columns have been retrieved from ground-based Fourier transform infrared (FTIR) campaign measurements in 2004 and 2007 and from UV-Visible MAX-DOAS measurements in 2004–2005 at the...