(5 种)分别聚在了一起ꎬ 在属级分类中ꎬ聚合度较好ꎬ吻合传统分类ꎮ 在距离 表 2 姜属植物在 1 200 ~ 1 000 cm~1的 红外二阶导数谱带的归属情况 Table 2 Band of second derivatives spectra assignments for Zingiber in 1 200-1 000 cm~1 振动峰位 Vibration peak position ( cm~1 ) 振动...
plate for the THz (far-infrared) region that can be mounted on the ATR-500/Mi, used for these measurements, is configured to allow sealing of the ATR crystal area. This keeps the liquid from vaporizing when the sample chamber is depressurized and enables simple ATR measurements. The Si ...
Peak shift [cm -1 ] H 2 O - - 182.2 - CaCl2aq (+2) 0.114 2.0 187.1 +4.9 NaClaq (+1) 0.116 2.0 181.3 -0.9 5.0 177.4 -4.8 KClaq (+1) 0.152 2.0 177.4 -4.8 5.0 164.9 -17.3 Table 2 Peak Shift of Each Sample 0.04 0.14 ...
Table3ThermodynamicconstantsforCr(Ⅲ) removalonsynthesizedzeolite 2.7I~’TIR 分析 无机化合物在红外区的光谱吸收主要是由基团的晶格振 动引起的.由图6 可知:水热晶化法合成沸石的红外光谱中, 3500~3400cm 为高波数区硅铝酸盐Si0H 和A10H 中 ～ 0H 的伸缩振动峰.1300cm 以下为指纹区,由硅氧或铝...
The numbers in parentheses indicate the position according to peak height (see Additional file 1, Figure S1). (DOC 122 KB) 13007_2010_132_MOESM3_ESM.DOC Additional file 3:Table S2 - Absorption band assignments of the first (PC1), second (PC2), third (PC3) and fourth (PC4) factor ...
We suggest that this obstacle can be overcome by measuring temperature-dependent changes to the strength of infrared absorption in the main Si–O–Si stretching band—i.e., by measuring the height of the main Si–O–Si peak rather than its position. However, this approach must contend with ...
Si 4.4 3.7 4.2 4.0 Ti 6.4 3.5 4.2 4.0 Fig. 7 shows the FTIR data of welding fumes generated by flux cored wires. Major peaks in welding fumes sample FC1 are at wavenumbers 586, 894, 983, 1042, 1361, 1537, 1653 cm−1. The peak at wavenumber 894 cm−1 is due to the O...
(1640 cm−1) with a relative peak intensity ratio of 2.5 ± 0.1, as calculated after baseline correction for both water peaks and normalization with respect to the OH-bending band. The obtained relative peak intensity ratios of the water bands are plotted in Fig.3bfor different ...
± were the Si — O stretching vi‐ bration band of kaolinite .The shape of these two peaks and the value of the peak at 1 010 cm - 1 ± were related to the crystallinity and content of this mineral . The double sharp peaks at 800 cm ...
The SiO2 and SiC are found by XPS peak (Si2p bands) positions 99.4 eV, 103.5 eV, and 100.3 eV, respectively. Peaks obtained are 100.87 eV and 97.75 eV (Figure 13), which reveals the presence of SiC and eventually Si. This compound is quite stable, since the alloy...