scholarly journals Raman spectroscopic characterization of selenite reduction by the bacterium Azospirillum thiophilum in the presence of an increased concentration of sulphate

2020 ◽  
Author(s):  
A. A. Vladimirova ◽  
A. A. Kamnev ◽  
A. V. Tugarova
Keyword(s):  
Raman Spectroscopy ◽  
Spectroscopic Characterization ◽  
Selenite Reduction ◽  
Raman Spectroscopic

In the biomass of A. thiophilum BV-S grown in the presence of 7 mM Na2SO4, Raman spectroscopy showed a peak at 348 cm–1 (Se–S bond) in addition to a peak at 250 cm–1 (amorphous modification of Se).

Raman spectroscopic characterization of submicron vapor-grown carbon fibers and carbon nanofibers obtained by pyrolyzing hydrocarbons

1999 ◽  
Vol 14 (12) ◽  
pp. 4474-4477 ◽  
Author(s):  
M. Endo ◽  
K. Nishimura ◽  
Y. A. Kim ◽  
K. Hakamada ◽  
T. Matushita ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Raman Spectroscopy ◽  
Carbon Nanofibers ◽  
Carbon Fibers ◽  
Spectroscopic Characterization ◽  
Treatment Temperature ◽  
Two Dimensional ◽  
Raman Spectroscopic ◽  
Main Transition

Variations of the properties of submicron vapor-grown carbon fibers (VGCFs) and nanofibers, with diameters around 0.1–0.2 μm and 80–100 nm, respectively, are observed by Raman spectroscopy as a function of heat-treatment temperature. The microstructural evolution strongly depends on the original properties of the material, such that the main transition temperatures associated with the onset for establishing two-dimensional graphene ordering are defined below 1500 °C for the nanofibers and 2000 °C for the submicron VGCFs, respectively. The relative intensities (ID/IG) of the as-grown phase for submicron VGCFs and nanofibers are 3.44 and 1.35, while those for the corresponding graphitized samples are 0.393 and 0.497, respectively.

Raman Spectroscopic Characterization of Melanoma and Benign Melanocytic Lesions Suspected of Melanoma Using High-Wavenumber Raman Spectroscopy

2016 ◽  
Vol 88 (15) ◽  
pp. 7683-7688 ◽  
Author(s):  
Inês P. Santos ◽  
Peter J. Caspers ◽  
Tom C. Bakker Schut ◽  
Remco van Doorn ◽  
Vincent Noordhoek Hegt ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Spectroscopic Characterization ◽  
Raman Spectroscopic ◽  
Melanocytic Lesions

Near-infrared Raman spectroscopy for assessing biochemical changes of cervical tissue associated with precarcinogenic transformation

The Analyst ◽  
2014 ◽  
Vol 139 (21) ◽  
pp. 5379-5386 ◽  
Author(s):  
Shiyamala Duraipandian ◽  
Jianhua Mo ◽  
Wei Zheng ◽  
Zhiwei Huang
Keyword(s):  
Raman Spectroscopy ◽  
Near Infrared ◽  
Spectroscopic Characterization ◽  
Biochemical Changes ◽  
Cervical Tissue ◽  
Raman Spectroscopic

NIR Raman spectroscopic characterization of cervical precarcinogenic transformation.

Raman Spectroscopic Characterization of Carbon Nanofibers Obtained by Using Metal Chloride as Catalyst Precursor

2007 ◽  
Vol 561-565 ◽  
pp. 1387-1390
Author(s):  
Fei Li ◽  
Xiao Ping Zou ◽  
Jin Cheng ◽  
Hong Dan Zhang ◽  
Peng Fei Ren ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Carbon Nanofibers ◽  
Amorphous Carbon ◽  
Spectroscopic Characterization ◽  
Copper Plate ◽  
Metal Chloride ◽  
Catalyst Precursor ◽  
Raman Spectroscopic ◽  
Degree Of Graphitization

Carbon nanofibers have been obtained by the interaction of ethanol with metal chloride over copper plate. Different metal chloride was used as the catalyst precursor. The products were characterized by the Raman spectroscopy for the degree of graphitization. The relative intensities and the amount of amorphous carbon were estimated. The results indicate that the catalyst precursor has effects on the degree of graphitization of carbon nanofibers.

FT-IR and micro-Raman spectroscopic characterization of minerals in high-calcium coal ashes

2018 ◽  
Vol 91 (3) ◽  
pp. 389-396 ◽  
Author(s):  
Yanshan Yin ◽  
Jie Yin ◽  
Wei Zhang ◽  
Hong Tian ◽  
Zhangmao Hu ◽  
...  
Keyword(s):  
Spectroscopic Characterization ◽  
Raman Spectroscopic ◽  
High Calcium ◽  
Ft Ir ◽  
Coal Ashes
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