Author: Andrew Jason McNary
Publisher:
ISBN:
Category : Dielectric measurements
Languages : en
Pages : 330

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Book Description

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 134

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Book Description
Terahertz (THz) generation and detection techniques have been developed widely and improved in the last few decades. THz techniques have been applied to many fields, such as medical support (THz imaging for breast cancer and skin cancer), security devices, material studies and astronomy. In our group, we utilize THz time domain spectroscopy (1-67 cm -1, 30 GHz-2 THz, 0.1-8 meV) to study both intramolecular interaction and intermolecular interaction, such as the flexibility changes due to the electron transfer of cytochrome c and ligand binding of lysozyme and tri-N-acetyl-D-glucosamine. My work is focused on the electron transfer of cytochrome c and the hydration and temperature effects on cytochrome c. In the studies of cytochrome c, I investigated the THz dielectric response of cytochrome c as a function of oxidation, hydration and temperature in order to elucidate the underlying structural mechanisms involved in the electron transfer of cytochrome c. The THz dielectric response of cytochrome c dramatically increases with oxidation, implying either a significant global softening of the potential and/or a significant increase in polarizability with oxidation. Hydration dependence measurements show that a difference in the equilibrium water content with oxidation does not explain the change in THz response. The temperature dependence of both ferri- and ferro-cytochrome c THz dielectric response also cannot elucidate this large increase with oxidation. The results of these different THz dielectric measurements of cytochrome c strongly suggest that the flexibility increases as a function of oxidation state. The experimental results were compared to the normal mode calculations. These calculations were performed to determine what impact electron transfer and hydration have on the harmonic response of cytochrome c. The calculated normal mode density from CHARMM shows similar frequency dependence at low frequencies for all hydrations. The hydration dependence of the calculated absorption intensities are in approximate agreement with the measured THz absorbance, except at low hydrations and at low frequencies. The breakdown in agreement may be due to all waters, including crystal waters, being treated with the simplified TIP3 water force field. In the study of ligand binding, a method for rapid determination of protein ligand binding on solution phase samples using terahertz dielectric spectroscopy is demonstrated. Measurements were performed using terahertz time domain spectroscopy on aqueous solutions below the liquid-solid transition for water. Small ligand binding sensitivity was demonstrated using tri-acetylgluosamine and hen egg white lysozyme with a decrease in dielectric response with binding. The magnitude of the change increases with frequency.

Author: Tianyi Yu
Publisher:
ISBN:
Category :
Languages : en
Pages : 50

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Book Description
If the hydration is lower than a critical hydration level the THz dielectric response increase slowly. And it increases sharply if the hydration is higher than that hydration level. This phenomenon is called hydration transition. In this experiment, we use CHARMM to simulate this phenomenon. Then we compare the data we get from CHARMM with the real experimental data and try to explain the difference between them.

Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 306

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Book Description
"Education, arts and social sciences, natural and technical sciences in the United States and Canada".

Author: V. Buch
Publisher: Springer Science & Business Media
ISBN: 9783540004110
Category : Science
Languages : en
Pages : 488

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Book Description
Written by leading experts in the field, this book gives a wide-ranging and coherent treatment of water in confining geometries. It compiles and relates interdisciplinary work on this hot topic of research important in many areas of science and technology.

Author: Robert Hull
Publisher: IET
ISBN: 9780852969335
Category : Electronic books
Languages : en
Pages : 1054

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Book Description
A unique and well-organized reference, this book provides illuminating data, distinctive insight and expert guidance on silicon properties.

Author: Jeyasingh Ebenezar
Publisher: Springer
ISBN: 3319448900
Category : Science
Languages : en
Pages : 731

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Book Description
This book gathers the proceedings of the plenary sessions, invited lectures, and papers presented at the International Conference on Recent Trends in Materials Science and Applications (ICRTMSA-2016). It also features revealing presentations on various aspects of Materials Science, such as nanomaterials, photonic crystal fibers, quantum dots, thin film techniques, crystal growth, spectroscopic procedures, fabrication and characterisation of new materials / compounds with enhanced features, and potential applications in nonlinear optical and electro-optic devices, solar cell device, chemical sensing, biomedical imaging, diagnosis and treatment of cancer, energy storage device etc. This book will be of great interest to beginning and seasoned researchers alike.

Author: R Balian
Publisher: World Scientific
ISBN: 9814531898
Category : Science
Languages : en
Pages : 636

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Book Description
Contents: Percolation and Localization (D J Thouless)Disordered Systems — Experimental Viewpoint (J Joffrin)Lectures on Amorphous Systems (P W Anderson)Elementary Algebraic Topology Related to the Theory of Defects and Textures (V Poenaru)Models of Disordered Materials (S Kirkpatrick)Thermal and Geometrical Critical Phenomena in Random Systems (T C Lukensky)A Short Guide to Polymer Physics (P-G de Gennes)and 9 seminars Readership: Graduate students and researchers in condensed matter physics.

Author: Satoshi Horikoshi
Publisher: John Wiley & Sons
ISBN: 3527338152
Category : Science
Languages : en
Pages : 426

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Book Description
A comprehensive overview covering the principles and preparation of catalysts, as well as reactor technology and applications in the field of organic synthesis, energy production, and environmental catalysis. Edited and authored by renowned and experienced scientists, this reference focuses on successful reaction procedures for applications in industry. Topics include catalyst preparation, the treatment of waste water and air, biomass and waste valorisation, hydrogen production, oil refining as well as organic synthesis in the presence of heterogeneous and homogeneous catalysts and continuous-flow reactions. With its practical relevance and successful methodologies, this is a valuable guide for chemists at universities working in the field of catalysis, organic synthesis, pharmaceutical or green chemistry, as well as researchers and engineers in the chemical industry.

Author: Victor E Borisenko
Publisher: World Scientific
ISBN: 9813224541
Category : Science
Languages : en
Pages : 531

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Book Description
This book presents invited reviews and original short notes of recent results obtained in studies concerning the fabrication and application of nanostructures, which hold great promise for the new generation of electronic, optoelectronic and energy conversion devices. They present achievements discussed at Special Sessions 'Frontiers of Molecular Diagnostics with Nanostructures' and 'Nanoelectromagnetics' organized within Nanomeeting-2017.Discussing exciting and relatively new topics such as fast-progressing nanoelectronics and optoelectronics, molecular electronics and spintronics, nanoelectromagnetics, nanophotonics, nanosensorics and nanoenergetics as well as nanotechnology and quantum processing of information, this book gives readers a more complete understanding of the practical applications of nanotechnology and nanostructures.