Characteristic absorption peak of the human blood measured with differential photoacoustic spectroscopy

2002 ◽  
Vol 47 (24) ◽  
pp. 2029 ◽  
Author(s):  
Zhilie TANG
Keyword(s):  
Human Blood ◽  
Photoacoustic Spectroscopy ◽  
Absorption Peak ◽  
Characteristic Absorption ◽  
Characteristic Absorption Peak

Eco friendly synthesis and characterization of zinc oxide nanoparticles from Aegle marmelos and its cytotoxicity effects on MCF-7 cell lines

2021 ◽  
Vol 6 (1) ◽  
pp. 44-51
Author(s):  
Manikandan Dhayalan ◽  
Malathi Selvaraj ◽  
Kumar B Karthick ◽  
Riyaz S.U. Mohammed ◽  
Mika Sillanpää
Keyword(s):  
Zinc Oxide ◽  
Cell Lines ◽  
Absorption Peak ◽  
Aegle Marmelos ◽  
Zno Nps ◽  
Pure Zinc ◽  
Characteristic Absorption ◽  
Characteristic Absorption Peak ◽  
Vis Spectroscopy ◽  
Mcf 7

Abstract An attempt was made to synthesize zinc oxide gum white nanoparticles (ZnO-GWNPs) by the greenway approach using Aegle marmelos (Bael fruit) juice extract as a capping and reducing agent. Synthesis of ZnO-GWNPs by greener approach is safer, more economical, more energy-efficient, eco-friendlier, and less toxic than chemically synthesized counterparts. The optical properties of the ZnO-GWNPs were ascertained through UV-Vis spectroscopy, Fourier Transform-Infrared (FT-IR), X-ray diffraction (XRD), High-resolution transmittance electron microscopy (HRTEM). A characteristic absorption peak at 385nm confirmed the presence of ZnO-GWNP using UV-Vis spectroscopy. FTIR spectrum revealed that the characteristic absorption peak of the Zn-O bond was observed at 467 cm-1. The XRD result for the ZnO showed the tendency of the three most intense diffraction peaks. The average crystallite size ZnO NPs at scattering angle (2θ) 22.89 and 32.15 was 39.14 and 26.08 nm and it showed the presence of miller indices of (100), (002), (101), (102) respectively. The EDX spectrum gave strong signals for zinc and oxygen indicating the occurrence of the nanoparticles in their oxide form rather than the pure zinc form. The SEM image showed the surface morphology of ZnO-GW NPs and the HR-TEM image showed the crystalline nature of ZnO-GW NPs. Cytotoxicity study of ZnO-GW NPs was determined against MCF-7 cell lines and the IC50 values were found to be 40 µg/mL and 60 µg/mL at 24 h and 48 h respectively.

Research on Performance of Vetier (Vetiveria zizanioides) Cellulose Micro/Nano Fibrils Isolated by High Intensity Ultrasonication

2011 ◽  
Vol 393-395 ◽  
pp. 1405-1408
Author(s):  
Xin Wang ◽  
Yan Wu ◽  
Jin Tian Huang
Keyword(s):  
High Intensity ◽  
Absorption Peak ◽  
Wave Number ◽  
Vetiveria Zizanioides ◽  
Relative Crystallinity ◽  
Characteristic Absorption ◽  
Basic Properties ◽  
Characteristic Absorption Peak

The cellulose micro/nano fibrils of Vetier (Vetiveria zizanioides) were isolated by high intensity ultrasonication in this paper. The basic properties of micro/nano fibrils were evaluated by WAXD and FTIR. The results showed that the relative crystallinity decreased when treated by high intensity ultrasonication. The characteristic absorption peak moved to higher wave number and the type of group increased with increasing the vibration of ultrasonication. The characteristic absorption peak moved to higher wave number with increasing treated time, however, the effect was insignificant.

Colorimetric detection of Cr(vi) using silver nanoparticles functionalized with PVP

2019 ◽  
Vol 11 (45) ◽  
pp. 5819-5825 ◽  
Author(s):  
Shunzhen He ◽  
Xi Lin ◽  
Hao Liang ◽  
Fubing Xiao ◽  
Feifei Li ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Colorimetric Detection ◽  
Absorption Peak ◽  
Characteristic Absorption ◽  
Characteristic Absorption Peak ◽  
Bright Yellow

In pH 5.5 PBS buffer, PVP selectively coordinated with Cr(vi), causing PVP-AgNPs aggregation, the solution color changed from bright yellow to orange, and the characteristic absorption peak of PVP–AgNPs at 390 nm lowered, a new peak at 530 nm appeared.

Identification Model in Frying Oil Based on Interval Partial Least Squares Regression Analysis

2013 ◽  
Vol 718-720 ◽  
pp. 792-796
Author(s):  
Ming Fu Zhao ◽  
Zheng Wei Zhang ◽  
Nian Wang
Keyword(s):  
Partial Least Square ◽  
Frying Oil ◽  
Least Square ◽  
Absorption Peak ◽  
Least Squares Regression ◽  
Spectral Absorption ◽  
Characteristic Absorption Peak ◽  
Time Usage ◽  
Long Time ◽  
Optimum Interval

As we known frying oil belongs to waste oils when it has been excessive used, long time usage also cause serious effect. This paper chooses dragon fish oil which was fried 10 times excessively. We can extract the characteristic in absorption peak (323.391.443nm) of spectral absorption value as the dependent variable. Then build the interval partial least square model, Through the MATLAB, we can extract the optimum interval is 5 and the best factor of wavelength range is 7. Prediction of correlation coefficient for R is 0.998. By the cross validation verification Q22=-0.3461<0.0975, we can get the establishment of PLS equation as Y1, Y2, Y3. The model which we build can predict the content situation of characteristic absorption peak in frying oil effectively.

Rapid Infrared Method for Toxaphene in Animal Dips and Sprays

1964 ◽  
Vol 47 (3) ◽  
pp. 591-594
Author(s):  
Fred P Czech
Keyword(s):  
Sodium Chloride ◽  
Carbon Tetrachloride ◽  
Infrared Spectrum ◽  
Spectrophotometric Method ◽  
Active Ingredient ◽  
Baseline Method ◽  
Characteristic Absorption ◽  
Characteristic Absorption Peak ◽  
Infrared Method

Abstract An infrared spectrophotometric method has been developed for the determination of toxaphene in aqueous emulsions used for the eradication of ectoparasites in livestock. The active ingredient is "salted-out" of emulsion with sodium chloride and extracted with carbon tetrachloride, and an infrared spectrum is taken of the latter extract. Toxaphene concentration is obtained from its characteristic absorption peak at 1303 cm-1 by the baseline method. The infrared method has the advantages of speed, simplicity, and, especially, specificity over chemical procedures.

scholarly journals Characterization of the eyespot and hematochrome-like granules of Euglena gracilis by scan-free absorbance spectral imaging A(x, y, λ) for quantification of carotenoids within the live cells

2018 ◽  
Author(s):  
Kyohei Yamashita ◽  
Takafumi Yagi ◽  
Takumi Isono ◽  
Yusuke Nishiyama ◽  
Masafumi Hashimoto ◽  
...  
Keyword(s):  
Euglena Gracilis ◽  
Absorption Maximum ◽  
Spectral Imaging ◽  
Basic Research ◽  
Live Cells ◽  
Carotenoid Content ◽  
Characteristic Absorption ◽  
Non Invasive ◽  
Characteristic Absorption Peak

Euglena gracilis is an edible photosynthetic single-cell alga that can synthesize carotenoids. It is highly demanded to establish the technology to select and grow individual cells capable of synthesizing more carotenoids because it contributes to safe and inexpensive production of carotenoids. In the cells of E. gracilis, carotenoids are mainly contained in chloroplasts and eyespots, and typical carotenoids have a characteristic absorption maximum in common. E. gracilis also has an organelle resembling hematochrome, which has an appearance similar to the eyespot and the absorption band spectrally overlapping that of the carotenoid although reportedly it does not contain carotenoids. To discriminate the eyespot and hematochrome-like granules and to investigate the intracellular distribution of carotenoids, scan-free, non-invasive, absorbance spectral imaging A(x, y, λ) microscopy of single live cells was applied. It was demonstrated that this technique is a powerful tool not only for basic research on intracellular structural analysis but also for identifying difference in carotenoid content in individual cells applicable to screening of carotenoid-rich cells. By this technique, it was confirmed that carotenoids exist in chloroplasts and eyespots, and a number of characteristic absorption spectra of pigments observed specific to the eyespot or hematochrome-like granules were identified. In addition, it was found that hematochrome-like granules have a characteristic absorption peak at 620 nm as well as at 676 nm, suggesting that its origin is a component of chloroplast including Chlorophyll a.

Application of Photoacoustic Spectroscopy to Human Blood

1988 ◽  
pp. 542-545 ◽  
Author(s):  
Qing Pan ◽  
Shu-ye Qiu ◽  
Shu-yi Zhang ◽  
Ji-bin Zhang ◽  
Si-ming Zhu
Keyword(s):  
Human Blood ◽  
Photoacoustic Spectroscopy

scholarly journals Characterization of the eyespot and hematochrome-like granules of Euglena gracilis by scan-free absorbance spectral imaging A(x, y, λ) for quantification of carotenoids within the live cells

2018 ◽  
Author(s):  
Kyohei Yamashita ◽  
Takafumi Yagi ◽  
Takumi Isono ◽  
Yusuke Nishiyama ◽  
Masafumi Hashimoto ◽  
...  
Keyword(s):  
Euglena Gracilis ◽  
Absorption Maximum ◽  
Spectral Imaging ◽  
Basic Research ◽  
Live Cells ◽  
Carotenoid Content ◽  
Characteristic Absorption ◽  
Non Invasive ◽  
Characteristic Absorption Peak

Euglena gracilis is an edible photosynthetic single-cell alga that can synthesize carotenoids. It is highly demanded to establish the technology to select and grow individual cells capable of synthesizing more carotenoids because it contributes to safe and inexpensive production of carotenoids. In the cells of E. gracilis, carotenoids are mainly contained in chloroplasts and eyespots, and typical carotenoids have a characteristic absorption maximum in common. E. gracilis also has an organelle resembling hematochrome, which has an appearance similar to the eyespot and the absorption band spectrally overlapping that of the carotenoid although reportedly it does not contain carotenoids. To discriminate the eyespot and hematochrome-like granules and to investigate the intracellular distribution of carotenoids, scan-free, non-invasive, absorbance spectral imaging A(x, y, λ) microscopy of single live cells was applied. It was demonstrated that this technique is a powerful tool not only for basic research on intracellular structural analysis but also for identifying difference in carotenoid content in individual cells applicable to screening of carotenoid-rich cells. By this technique, it was confirmed that carotenoids exist in chloroplasts and eyespots, and a number of characteristic absorption spectra of pigments observed specific to the eyespot or hematochrome-like granules were identified. In addition, it was found that hematochrome-like granules have a characteristic absorption peak at 620 nm as well as at 676 nm, suggesting that its origin is a component of chloroplast including Chlorophyll a.

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