scholarly journals A chirped-pulse Fourier-transform microwave/pulsed uniform flow spectrometer. I. The low-temperature flow system

2014 ◽  
Vol 141 (15) ◽  
pp. 154202 ◽  
Author(s):  
James M. Oldham ◽  
Chamara Abeysekera ◽  
Baptiste Joalland ◽  
Lindsay N. Zack ◽  
Kirill Prozument ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Low Temperature ◽  
Flow System ◽  
Uniform Flow ◽  
Chirped Pulse

Direct versus Indirect Photodissociation of Isoxazole from Product Branching: A Chirped-Pulse Fourier Transform mm-Wave Spectroscopy/Pulsed Uniform Flow Investigation

2018 ◽  
Vol 122 (38) ◽  
pp. 7523-7531 ◽  
Author(s):  
Nureshan Dias ◽  
Baptiste Joalland ◽  
Nuwandi M. Ariyasingha ◽  
Arthur G. Suits ◽  
Bernadette M. Broderick
Keyword(s):  
Fourier Transform ◽  
Uniform Flow ◽  
Chirped Pulse ◽  
Flow Investigation ◽  
Product Branching

scholarly journals A chirped-pulse Fourier-transform microwave/pulsed uniform flow spectrometer. II. Performance and applications for reaction dynamics

2014 ◽  
Vol 141 (21) ◽  
pp. 214203 ◽  
Author(s):  
Chamara Abeysekera ◽  
Lindsay N. Zack ◽  
G. Barratt Park ◽  
Baptiste Joalland ◽  
James M. Oldham ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Reaction Dynamics ◽  
Uniform Flow ◽  
Chirped Pulse

On the infrared spectrum and dipole moment of dichloroketene

1985 ◽  
Vol 63 (3) ◽  
pp. 676-677 ◽  
Author(s):  
M. C. L. Gerry ◽  
W. Lewis-Bevan ◽  
N. P. C. Westwood
Keyword(s):  
Fourier Transform ◽  
Dipole Moment ◽  
Low Temperature ◽  
Infrared Spectrum ◽  
Flow System ◽  
Fourier Transform Infrared ◽  
Microwave Spectrum ◽  
Successful Observation

The failure to observe a microwave spectrum of dichloroketene prepared in a low temperature flow system is contrasted with the successful observation of its Fourier Transform infrared spectrum under the same conditions. It is concluded that the lack of a microwave spectrum is a result of a near-zero dipole moment for dichloroketene.

scholarly journals Study on Performance Damage and Mechanism Analysis of Asphalt under Action of Chloride Salt Erosion

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3089
Author(s):  
Peilei Zhou ◽  
Wensheng Wang ◽  
Lili Zhu ◽  
Haoyun Wang ◽  
Yongming Ai
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
High Temperature ◽  
Low Temperature ◽  
Temperature Sensitivity ◽  
Salt Solution ◽  
Solution Concentration ◽  
Chloride Salt ◽  
Temperature Performance ◽  
Low Temperature Performance

This study aims to investigate the performance evolution and mechanism of asphalt under action of chloride salt erosion. Asphalt samples soaked with five different snow melting chloride salt concentrations were taken as the research object. Then, the high-temperature performance, low-temperature performance, temperature sensitivity and asphalt–aggregate adhesion property of asphalt samples were carried out. Additionally, Fourier transform infrared spectroscopy (FTIR) was used to explore the mechanism of chloride salt erosion on asphalt. Test results showed the linear variation relationships of high-temperature performance, low-temperature performance and temperature sensitivity with chloride salt concentrations. The high-temperature performance of asphalt would be improved by chloride snowmelt salt. With the increase in the chloride salt solution concentration, the low-temperature performance of asphalt became worse, and the temperature sensitivity increased. Moreover, after the effect of the chloride salt solution, the asphalt–aggregate adhesion property decreased with the increase in the chloride salt solution concentration. It is necessary to control the amount of chloride snowmelt salt in the actual snow removal projects. Finally, based on Fourier transform infrared spectroscopy, the mechanism of chloride salt erosion on asphalt was preliminarily explored. With the increase in the chloride salt solution concentration, the proportion of light components (saturated fraction, aromatic fraction) in asphalt decreased, and the proportion of heavy components (resin and asphaltene) with good thermal stability increased.

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