Browsing by Title
Now showing items 60196-60215 of 143257
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Hydrogen : what fuel cell vehicles and advanced nuclear reactors have in common
(Massachusetts Institute of Technology, 2005)This thesis reports on two technology and policy issues directly related to hydrogen economy. The first issue concentrates on the end-use application of hydrogen as a transportation fuel, and deals with the following ... -
Hydrogen assisted cracking of high strength steel welds
(Massachusetts Institute of Technology, 1987) -
Hydrogen Bond Network Between Amino Acid Radical Intermediates on the Proton-Coupled Electron Transfer Pathway of E. Coli Α2 Ribonucleotide Reductase
(American Chemical Society (ACS), 2014-12) -
Hydrogen bond rearrangements and the motion of charge defects in water viewed using multidimensional ultrafast infrared spectroscopy
(Massachusetts Institute of Technology, 2010)Compared with other molecular liquids, water is highly structured due to its ability to form up to four hydrogen bonds to its nearest neighbors, resulting in a tetrahedral network of molecules. However, this network is ... -
Hydrogen Bond Rearrangements in Water Probed with Temperature-Dependent 2D IR
(American Chemical Society, 2010-03)We use temperature-dependent two-dimensional infrared spectroscopy (2D IR) of dilute HOD in H2O to investigate hydrogen bond rearrangements in water. The OD stretching frequency is sensitive to its environment, and loss ... -
Hydrogen bond reorganization and vibrational relaxation in water studied with ultrafast infrared spectroscopy
(Massachusetts Institute of Technology, 2011)Water consists of an extended hydrogen bond network that is constantly evolving. More than just a description of the time averaged structure is necessary to understand any process that occurs in water. In this thesis we ... -
Hydrogen bonding and solvation dynamics of n-methylacetamide in denatured water (D₂O) or denatured chloroform (CDCl₃) from nonlinear spectroscopy
(Massachusetts Institute of Technology, 2004)Hydrogen bonding between N-methylacetamide (NMA) and different solvents (D₂O or CDCl₃) was studied by using two-dimensional infrared spectroscopy to probe the frequency fluctuations of the amide I mode of the solvated NMA. ... -
Hydrogen bonding in aqueous solution and peptide helicity studied using model systems
(Massachusetts Institute of Technology, 1999) -
Hydrogen bonding structure of confined water templated by a metal-organic framework with open metal sites
(Springer Science and Business Media LLC, 2019-10)Water in confinement exhibits properties significantly different from bulk water due to frustration in the hydrogen-bond network induced by interactions with the substrate. Here, we combine infrared spectroscopy and many-body ... -
Hydrogen Control in Alcator C-Mod Walls and Plasmas
(MIT Plasma Science & Fusion Center, 2006-09-20) -
Hydrogen Cyanide Accumulation and Transformations in Non-polluted Salt Marsh Sediments
(Springer Netherlands, 2012-10)While cyanide is known to be produced by many organisms, including plants, bacteria, algae, fungi and some animals, it is generally thought that high levels of cyanide in aquatic systems require anthropogenic sources. Here, ... -
Hydrogen degradation and microstructural effects of the near-threshold fatigue resistance of pressure vessel steels
(Massachusetts Institute of Technology, 1982)Safety of pressure vessels for applications such as coal conversion reactors requires understanding of the mechanism of environmentally-induced crack propagation and the mechanism by which process-induced microstructures ... -
Hydrogen degradation of high strength steel weldments
(Massachusetts Institute of Technology, 1993) -
Hydrogen degradation on InP HEMTs
(Massachusetts Institute of Technology, 1999) -
Hydrogen diffusion and trapping in electrodeposited nickel
(Massachusetts Institute of Technology, 1989) -
Hydrogen Distribution in Metal Hydrides and its Effect on Reactor Physics Calculations
(Massachusetts Institute of Technology, 2023-06)Efficient and trustworthy simulations of nuclear reactor systems require that neutronmaterial interaction data be accurate, convenient to use, and readily available. When describing these interactions, the corresponding ... -
Hydrogen effects on the point defect spectrum in Fe-C alloys
(Massachusetts Institute of Technology, 2008)As part of a multi-scale approach for modeling hydrogen embrittlement in hardened steels we have investigated, employing density functional theory methods, the stability and concentrations of the point defect clusters ... -
Hydrogen entry in Zircaloy-4 fuel cladding : an electrochemical study
(Massachusetts Institute of Technology, 2015)Corrosion and hydrogen pickup of zirconium alloy fuel cladding in water cooled nuclear reactors are life-limiting phenomena for fuel. This thesis studies the fate of hydrogen liberated by waterside corrosion of Zircaloy-4 ... -
Hydrogen Epoch of Reionization Array (HERA)
(IOP Publishing, 2017-03)The Hydrogen Epoch of Reionization Array (HERA) is a staged experiment to measure 21 cm emission from the primordial intergalactic medium (IGM) throughout cosmic reionization (z = 6-12), and to explore earlier epochs of ... -
The hydrogen epoch of reionization array dish III: measuring chromaticity of prototype element with reflectometry
(Springer Netherlands, 2018-03-02)Abstract Spectral structures due to the instrument response is the current limiting factor for the experiments attempting to detect the redshifted 21 cm signal from the Epoch of Reionization (EoR). Recent ...
