scholarly journals Probing biological redox chemistry with large amplitude Fourier transformed ac voltammetry

2017 ◽  
Vol 53 (69) ◽  
pp. 9519-9533 ◽  
Author(s):  
Hope Adamson ◽  
Alan M. Bond ◽  
Alison Parkin
Keyword(s):  
Fourier Transform ◽  
Large Amplitude ◽  
Redox Chemistry ◽  
Ac Voltammetry ◽  
Fourier Transform Ac Voltammetry ◽  
Insight Into

A review of the insight into biological redox chemistry which has been enabled by the development of large amplitude Fourier transform ac voltammetry.

Separation of Electron-Transfer and Coupled Chemical Reaction Components of Biocatalytic Processes Using Fourier Transform ac Voltammetry

2005 ◽  
Vol 77 (11) ◽  
pp. 3502-3510 ◽  
Author(s):  
Barry D. Fleming ◽  
Jie Zhang ◽  
Alan M. Bond ◽  
Stephen G. Bell ◽  
Luet-Lok Wong
Keyword(s):  
Electron Transfer ◽  
Fourier Transform ◽  
Chemical Reaction ◽  
Ac Voltammetry ◽  
Fourier Transform Ac Voltammetry

scholarly journals Understanding (coupled) large amplitude motions: the interplay of microwave spectroscopy, spectral modeling, and quantum chemistry

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Ha Vinh Lam Nguyen ◽  
Isabelle Kleiner
Keyword(s):  
Fourier Transform ◽  
Quantum Chemistry ◽  
Large Amplitude ◽  
Environmental Chemistry ◽  
Broad Band ◽  
Microwave Spectroscopy ◽  
Rotational Spectrum ◽  
Spectral Modeling ◽  
Rotational Spectra ◽  
Large Amplitude Motions

AbstractA large variety of molecules contain large amplitude motions (LAMs), inter alia internal rotation and inversion tunneling, resulting in tunneling splittings in their rotational spectrum. We will present the modern strategy to study LAMs using a combination of molecular jet Fourier transform microwave spectroscopy, spectral modeling, and quantum chemical calculations to characterize such systems by the analysis of their rotational spectra. This interplay is particularly successful in decoding complex spectra revealing LAMs and providing reference data for fundamental physics, astrochemistry, atmospheric/environmental chemistry and analytics, or fundamental researches in physical chemistry. Addressing experimental key aspects, a brief presentation on the two most popular types of state-of-the-art Fourier transform microwave spectrometer technology, i.e., pulsed supersonic jet expansion–based spectrometers employing narrow-band pulse or broad-band chirp excitation, will be given first. Secondly, the use of quantum chemistry as a supporting tool for rotational spectroscopy will be discussed with emphasis on conformational analysis. Several computer codes for fitting rotational spectra exhibiting fine structure arising from LAMs are discussed with their advantages and drawbacks. Furthermore, a number of examples will provide an overview on the wealth of information that can be drawn from the rotational spectra, leading to new insights into the molecular structure and dynamics. The focus will be on the interpretation of potential barriers and how LAMs can act as sensors within molecules to help us understand the molecular behavior in the laboratory and nature.

scholarly journals Using Fourier Transform Infrared Spectroscopy to Study Effects of Magnetic Field Treatment on Wheat (Triticum aestivumL.) Seedlings

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Zhenlin Wei ◽  
Dejie Jiao ◽  
Junxiao Xu
Keyword(s):  
Magnetic Field ◽  
Fourier Transform ◽  
Conformational Changes ◽  
Structural Variation ◽  
Fourier Transform Infrared ◽  
Biological Mechanisms ◽  
Wheat Seedlings ◽  
Wheat Leaves ◽  
Germination And Growth ◽  
Insight Into

Magnetic field treatments have been utilized to promote germination and growth of a variety of species of plants; however the mechanism of concern has not been fully elucidated. In this research, wheat seedlings were treated with 500 mT and 1500 mT static magnetic field (SMF) for 10 and 20 min, respectively. Analyzing Fourier transform infrared spectra collected from leaves of seedlings showed that SMF treatments decreased the contents of lipids and proteins, shifted bands to higher wavenumbers in 3000–2800 cm−1regions, and increased the ratio of CH2/CH3which likely indicates a structural variation of lipids. For bands assigned to different second structures of proteins, slight bands shifting and changing the ratio of different second structures of proteins were observed due to SMF treatments. To summarize, the results revealed that lipids rather than proteins were sensitive to SMF treatments. The results provided insight into the SMF induced conformational changes of lipids and proteins in wheat leaves, which will help elucidate the biological mechanisms of SMF on plant growth and development.

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