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岩藻多糖酶的FTIR光谱研究
岩藻多糖酶 傅里叶变换红外光谱 二级结构
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2009/4/28
通过海洋真菌LD8固态发酵获得岩藻多糖的粗蛋白，并进一步采用柠檬酸缓冲液浸提、丙酮沉淀和葡聚糖凝胶G-100层析，分离纯化至单一组分；利用傅里叶变换红外光谱(fourier transform infrared spectroscopy,FTIR)及曲线拟合等技术研究了岩藻多糖酶的二级结构组成，增强因子为2.2，半峰宽为20.2 cm-1；为提高分析测定的准确性，对酰胺Ⅰ带与酰胺Ⅲ带分别进行拟合归...
选择耐铝性不同的2个大豆品种浙春2号(耐铝性)和浙春3号(铝敏感)作为实验材料，在设置铝胁迫的同时添加外源柠檬酸处理，应用傅里叶变换红外光谱法(FTIR)对外源柠檬酸协同铝胁迫下的大豆根组织干燥粉末进行直接测定，并对其特征吸收峰进行了归属。通过对各图谱的比较分析，铝处理下大豆根的红外吸收峰形及峰强有所区别，特别是1 057, 1 602, 2 927和3 297 cm-1左右的吸收峰区别明显，反应...
重金属铊胁迫羽衣甘蓝的in situ-ATR-FTIR表征
铊胁迫 羽衣甘蓝 光合作用 原位衰减全反射红外光谱
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2009/4/17
通过植物叶片光合作用消耗二氧化碳实验，实现了羽衣甘蓝光合作用的原位衰减全反射红外光谱表征。结果表明，羽衣甘蓝无论是否受到铊胁迫，其吸收峰的位置均无明显改变，其中3 380 cm-1处的强吸收峰表征叶片中的水分，碳水化合物，蛋白质和酰胺化合物等;2 916，2 850 cm-1处的强峰以及2 960 cm-1处的肩峰表征碳水化合物和脂肪族化合物等;1 640 cm-1处的吸收峰表征水分。然而，通过对...
淫羊藿药材一些混淆物种的FTIR鉴别研究
淫羊藿药材 傅里叶变换红外光谱 鉴别
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2009/4/9
淫羊藿是一味药用历史悠久的传统中药, 具有补肾壮阳之功效。《中国药典》规定使用五种来源的淫羊藿——淫羊藿Epimedium brevicornu Maxim.、箭叶淫羊藿E.sagittatum(Sieb. et Zucc.) Maxim.、柔毛淫羊藿E.pubescens Maxim.、朝鲜淫羊藿E.koreanum Nakai和巫山淫羊藿E.wushanense T.S.Ying，但这几种药材...
建立了基于人工神经网络(ANN)的遥感FTIR谱图解析方法。针对人工神经网络(ANN)训练时间过长和模型“过拟合”的问题，采用偏最小二乘法(PLS)和主成分分析法(PCA)，对输入ANN的光谱数据进行了主成分提取，使ANN分析时间从30多分钟缩短为10多秒钟；模型传递技术的引入，克服了遥感FTIR谱图分析中反复建模问题。经过优化的方法，实现了用EPA数据建模，对大气中的四组分混合体系——丙酮、苯、...
Ground-based FTIR measurements of CO from the Jungfraujoch: characterisation and comparison with in situ surface and MOPITT data
Ground-based FTIR CO Jungfraujoch characterisation surface MOPITT
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2009/3/11
CO vertical profiles have been retrieved from solar absorption FTIR spectra recorded at the NDSC station of the Jungfraujoch (46.5º N, 8º E and 3580 m a.s.l.) for the period from January 199...
FTIR spectroscopic studies of the simultaneous condensation of HCl and H2O at 190 K – Atmospheric applications
FTIR spectroscopic study simultaneous condensation HCl H2O Atmospheric applications
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2009/3/11
Type II polar stratospheric cloud particles are made up of ice that forms by water vapor condensation in the presence of numerous trace gases, including HCl. These gaseous species can co-condense with...
RDX热分解的TGDSCQMSFTIR同步动力学
分析化学 TGDSCQMSFTIR联用技术 RDX 热分解动力学 热分解机理
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2014/3/12
采用TGDSCQMSFTIR同步动力学技术对RDX的热分解过程进行了研究，结果表明，RDX在熔融之后发生分解，可以确定RDX的产物有C、H2O、CH2O、N2O、CO、CO2、NO2，可能有CH4和NH3，而几乎没有NO。采用多元非线性拟合技术进行动力学参数计算，结果表明，RDX的分解过程大致可以分为3个连续步骤，第1步反应的活化能为235kJ/mol，指前因子log(A/s-1)为22，反...
第4代太空板蓝根的FTIR分析研究
航天诱变育种 板蓝根 傅里叶变换红外光谱法
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2010/3/23
从整体上测定我国首次选育的第4代航天育种板蓝根和地面组板蓝根的FTIR谱，对主要组分进行对比分析，为深入研究其内在品质的变化积累数据，探索评价航天诱变育种板蓝根质量的方法。结果表明太空组板蓝根中主要吸收峰的强度在波数1 047，1 630以及1 412 cm-1处吸收比地面组均有不同的增强，提示太空板蓝根中多糖类、甾体、三萜类及黄酮类化合物成分含量有不同程度的增加，尤其是具有抗病毒功效的多糖类含量...
Stratospheric and tropospheric NO2 variability on the diurnal and annual scale: a combined retrieval from ENVISAT/SCIAMACHY and solar FTIR at the Permanent Ground-Truthing Facility Zugspitze/Garmisch
NO2 variability ENVISAT/SCIAMACHY solar FTIR
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2009/2/18
Columnar NO2 retrievals from solar FTIR measurements at the Zugspitze (47.42° N, 10.98° E, 2964 m a.s.l.), Germany were investigated synergistically with columnar NO2 retrieved from SCIAMACHY data by ...
Validation of ENVISAT/SCIAMACHY columnar methane by solar FTIR spectrometry at the Ground-Truthing Station Zugspitze
ENVISAT/SCIAMACHY columnar methane solar FTIR spectrometry Ground-Truthing Station Zugspitze
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2009/2/17
Methane total-vertical column retrievals from ground-based solar FTIR measurements at the Permanent Ground-Truthing Station Zugspitze (47.42° N, 10.98° E, 2964m a.s.l.), Germany are used to validate ...
Initial validation of ENVISAT/SCIAMACHY columnar CO by FTIR profile retrievals at the Ground-Truthing Station Zugspitze
Initial validation ENVISAT/SCIAMACHY columnar CO Ground-Truthing Station Zugspitze
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2009/2/11
Carbon monoxide vertical profile retrievals from ground-based solar FTIR measurements at the Permanent Ground-Truthing Station Zugspitze (47.42° N, 10.98° E, 2964m a.s.l.), Germany are used to validat...
采用红外光谱法(FTIR)、二阶导数红外光谱法和二维相关光谱分析技术(Two-Dimensional Correlation Spectroscopy) 对江西和安徽大血藤药材、水提物、蒽醌类提取物和残渣进行了快速无损比对分析研究，从中发现两产地大血藤药材的谱图中均出现1 400～1 620 cm-1和1 000～1 200 cm-1两个强峰带，说明药材含有大量的药效成分蒽醌类和糖类物质;蒽醌提取...
Subtropical trace gas profiles determined by ground-based FTIR spectroscopy at Izaña（28° N, 16° W）: Five-year record, error analysis, and comparison with 3-D CTMs
Subtropical trace gas profiles FTIR spectroscopy 3-D CTMs
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2009/1/23
Within the framework of the NDSC (Network for the Detection of Stratospheric Change) ground-based FTIR solar absorption spectra have been routinely recorded at Izaña Observatory (28° N, 16° W)...
Tecnical Note: Analysis of non-regulated vehicular emissions by extractive FTIR spectrometry: tests on a hybrid car in Mexico City
non-regulated vehicular emissions extractive FTIR spectrometry hybrid car Mexico City
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2009/1/20
A methodology to acquire valuable information on the chemical composition and evolution of vehicular emissions is presented. The analysis of the gases is performed by passing a constant flow of a sam...