Browsing Chemistry & Biochemistry by Title
Now showing items 346-365 of 553
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OMI Tropospheric Sulfur Dioxide Retreival: Validation and Analysis
(2007-08-28)SO2 impacts the radiative balance of the Earth and is the precursor to the major acid and much of the particulate matter in the atmosphere. Improved spectrometer resolution of the Ozone Monitoring Instrument (OMI) enables ... -
On Chip Isolation and Enrichment of Tumor Initiating Cells
(2012)We report for the first time a microdevice that enables the selective enrichment and culture of breast cancer stem cells using the principles of mammosphere culture. For nearly a decade, researchers have identified breast ... -
On the Cyclopolymerization of 1,6-Heptadienes, and their Role as Poly(methylenecycloalkane)s in Stereoengineering and Block Copolymers
(2015)The research presented herein, addresses key issues of homogeneous Group 4 single-site coordination polymerization (CP) catalysts for the production of polyolefins and polyolefin-like materials. Specifically, this research ... -
One-Dimensional Free Energy Surface Models of Protein Folding: Connecting Theory and Experiments
(2007-04-27)Experimental techniques have now reached the sub-microsecond timescale necessary to study fast events in protein folding. However, analysis of fast folding experiments still commonly rely on conventional procedures that ... -
Optical and quantum interferences in strong field ionization and optimal control
(2017)For decades, ultrafast laser pulses have been used to probe and control strong-field molecular dynamics, including in optimal control experiments. While these experiments successfully recover the optimal control pulses ... -
THE OPTICAL KERR EFFECT OF LIQUIDS
(2006-12-19)Optical Kerr effect (OKE) spectroscopy has found broad use in monitoring ultrafast dynamics in transparent media. I demonstrated that by using two pump pulses with independently-controllable polarizations, intensity and ... -
OPTICAL KERR EFFECT SPECTROSCOPY OF SIMPLE LIQUIDS
(2009)Optical Kerr effect (OKE) spectroscopy has become a prominent nonlinear optical technique for studying liquids, which allows for the direct, time-resolved probing of collective orientational diffusion as well as Raman-active ... -
ORBITAL-FREE DENSITY FUNCTIONAL THEORY OF ATOMS, MOLECULES, AND SOLIDS
(2005-11-23)Density functional (DF) theory has proved to be a powerful way to determine the ground state energy of atoms, molecules, and extended systems. An important part of the theory requires one to determine the kinetic energy ... -
Organic Electronics With Polymer Dielectrics On Plastic Substrates Fabricated Via Transfer Printing
(2007-12-04)Printing methods are fast becoming important processing techniques for the fabrication of flexible electronics. Some goals for flexible electronics are to produce cheap, lightweight, disposable radio frequency identification ... -
Oxidative C-H and C-C Bond Functionalization Catalyzed by Dirhodium Caprolactamate
(2006-12-06)Dirhodium tetrakiscaprolactamate, Rh2(cap)4, was found to be an effective catalyst for allylic oxidation in combination with tert-butyl hydroperoxide (t-BuOOH). Substituted cyclic olefins were converted to enones and ... -
OXIDATIVE FUNCTIONALIZATION OF PdII-C BONDS USING HYDROGEN PEROXIDE: EXPLORING THE POTENTIAL OF THE PdII HYDROCARBYL - DPK SYSTEM
(2013)Previously the oxidation utilizing hydrogen peroxide and various monoarylpalladium(II) complexes supported by di-(2-pyridyl)-ketone was shown to proceed via palladium(IV) intermediates that undergo C-X reductive elimination ... -
OXYGEN STORAGE PROPERTIES OF TERNARY METAL OXIDE SYSTEMS FOR CHEMICAL LOOPING REACTIONS
(2019)We have studied the reversible uptake and release of oxygen in the layered metal oxide system AB2O4 to understand their suitability as oxygen storage materials. We examined their structures at their most reduced, oxidized, ... -
Pair creation and pair annihilation in Bose-Einstein condensates
(2017)This thesis covers three applications of Bose-Einstein condensates and related phenomena, in the theme of pair creation and pair annihilation. First, Bose-Einstein condensates (BEC) are viewed as one of the candidates ... -
PALLADIUM-CATALYZED ALLYLIC-ARYLATION: MECHANISTIC STUDIES AND APPLICATION TO THE TOTAL SYNTHESIS OF (+/-)-7-DEOXYPANCRATISTATIN DERIVATIVES
(2009)Palladium-catalyzed carbon-carbon bond formation is one of the most widely used reactions for the synthesis of biologically active substances. The DeShong group has demonstrated that hypervalent silicates can be employed ... -
Parts List for Pendulum of Hansen & Lieberman compiled by J. Norman Hansen nhansen@umd.edu
(2014-10)This is a Parts List that provides instructions for the construction of the pendulum that was employed by Hansen and Lieberman. The Hansen and Lieberman articles are:Construction and Characterization of a Torsional Pendulum ... -
Past–future information bottleneck for sampling molecular reaction coordinate simultaneously with thermodynamics and kinetics
(SpringerNature, 2019)The ability to rapidly learn from high-dimensional data to make reliable bets about the future is crucial in many contexts. This could be a fly avoiding predators, or the retina processing gigabytes of data to guide human ... -
PATH-INTEGRAL MONTE-CARLO SIMULATIONS OF ALUMINUM ATOMS EMBEDDED IN SOLID PARA-HYDROGEN AND IN HELIUM CLUSTERS
(2005-05-27)In this dissertation we use a path-integral Monte Carlo (PIMC) simulation method to study an open-shell atomic Al impurity doped in two kinds of low temperature condensed media. We first use the Multilevel Metropolis ... -
PHOTO-GUIDED SHAPE TRANSFORMATION OF COMPOSITE HYDROGEL SHEETS
(2018)Shape-changing hydrogel material has numerous potential applications in biomimetics, soft robotics, biomedicine, etc. Light as a clean energy source can be remotely delivered to material with high spatial and temporal ... -
The Photochemistry of Amides and Phthalimides
(1977)N-Alkyl amides undergo photodecomposition much slower than their ketone, ester, and aldehyde analogs . The Norrish Type II process in amides is also less important than in these other classes of compounds due to electronic ... -
PHOTOINDUCED ELECTRON TRANSFER FOR PROTECTING GROUPS AND POLYMER SYNTHESIS
(2019)Using light to drive chemical reactions affords spatial and temporal control not typically displayed in thermal chemistry. For this reason, light induced transformations have been used in the manufacturing of polymers and ...