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化工 & 能源 : 学术学位
The basic part of most polymer and composite manufacturing processes involves flow of polymers in cavities of arbitrary shape. The process throughput and the product quality are often limited by the onset of flow instabilities. Hence, in order to design, optimize and control various polymers and com
Platinum-promoted anion-modified zirconia catalysts, such as tungstate-modified zirconia and sulfate-modified zirconia were studied in the hydrocracking and hydroisomerization of long-chain alkanes in Fischer-Tropsch waxes for producing high yields of middle distillates (C10-C 20) transportation fue
Bone marrow mesenchymal stem cells (MSCs) represent one of the most important adult stem cell types for regenerative medicine. These cells provide a reliable cell source for tissue engineering and cell-based therapies. Although MSCs have been isolated from many tissues in addition to bone marrow, th
We combine manipulation and single molecule visualization of flexible DNA polymers with the generation of controlled simple shear and planar mixed flows for the investigation of polymer flow physics. With the ability to observe polymer conformation directly and follow its evolution in both dilute an
Vapor phase lactic acid conversion has been performed using a fixed-bed, down-flow reactor. Lactic acid conversion conducted over sodium salts on low surface area silica catalysts produces mainly 2,3-pentanedione, acetaldehyde, and acrylic acid. Formation of acrylic acid from lactic acid is optimum
This work presents an approach to preparing polyethylene/thermoplastic starch blends with exceptional properties. Thermoplastic starch (TPS), as opposed to dry starch, is capable of flow and hence when mixed with other synthetic polymers can behave in a manner similar to conventional polymer-polymer
Several models are presented in this thesis for the systematic optimal design of grassroots and retrofit heat integration systems. Significant improvements over previous design methods are obtained due to the simultaneous nature of the proposed models. These models are not heuristic-based and can ac
The primary goal of this thesis is to apply thermodynamic, statistical mechanical and computer simulation methods to describe the equilibrium behavior of single-gases and mixtures confined in microporous adsorbents. Models capable of handling the effects of energetic heterogeneity and adsorbate-adso
Design and production of protein polymer drag-tags for application in free-solution, microchannel DNA sequencing.
Research efforts are described towards the creation of a novel series of non-natural, repetitive polypeptides (“protein polymers”) expressed in bacteria, which are designed to serve as “drag-tags” for microchannel DNA separation by End-Labeled Free-Solution Electrophoresis (E
Reconstitution of lyophilized therapeutic protein: Effects of formulation, processing techniques and surfaces.
To study the use of polysorbate 20 in a reconstitution solution on the affect of the aggregation of lyophilized recombinant human interferon-γ (rhIFN-γ), we lyophilized four formulations separately in two buffer systems. After reconstitution with a 0.03% polysorbate 20 solution, aggregat
This thesis aims to solve the following major problem in the process synthesis area of chemical engineering: Given a network of chemical reactions with its associated kinetics, given certain available resources such as the catalyst mass, given specific feed rates, given permissible temperature and p
Copper electrodeposition in the 'Dual Damascene' process for the metallization of semiconductor interconnects has recently become the mainstay for fabricating high-end microprocessors. The key to the successful implementation of this technology is an empirically formulated mixture of additives that
Density functional theory (DFT) and molecular dynamics (MD) techniques are used to study the most probable rate-determining step in electroreduction of oxygen on a platinum metal (M) surface:
O 2 g+H +
Study of adsorption of trisiloxane surfactants on air-water and hydrophobic solid-water interface: An attempt to explain the "super-spreading" behavior.
The exceptional ability of the trisiloxane surfactants to enhance spreading of water on highly hydrophobic surfaces has been the focus of many recent studies. The reason behind their “super-spreading” ability is not yet clear. In this work, we explain the reason of their “super-spr
n this work, we study the use of wavelets for numerical solutions of differential equations. Wavelets constitute unconditional bases for a variety of function spaces, thus they can provide accurate approximations of functions in such spaces. Wavelets have certain orthogonality, and may have compact
Establishment, cultivation and optimization of hairy roots of Catharanthus roseus for the synthesis of indole alkaloids.
"Hairy" roots hold the potential for economically feasible biotechnological routes to the controlled biosynthesis of complex, plant-derived, 'natural' molecules. A novel transgenic root system of the tropical plant Catharanthus roseus was established and analyzed for the synthesis of indole alkaloid
Improving polyimide membrane resistance to carbon dioxide plasticization in natural gas separations.
Polyimide membranes have been widely applied for gas separations due to their attractive permeability, selectivity, and processing characteristics. Their use for natural gas and hydrocarbon separations is limited by plasticization-induced selectivity losses in feeds with significant partial pressure
Engineering the in vitro ovarian follicle microenvironment: Developmental regulation by the culture matrix and translational approaches for human fertility preservation.
Improving cancer treatments are saving the lives of many young women, however these treatments often lead to premature infertility. The in vitro development of ovarian follicles would provide reproductive options to these women by supporting immature follicle growth following ovarian tissue cryoban
Process optimization plays an important role in the chemical process industry. In its most general form, process optimization is a multiobjective and multivariable optimization problem of an extremely complex nature. These complex optimization problems are divided into smaller problems that are easi
Near-patient clinical diagnostics: Development and characterization of a centrifugal separator and an air-segmented continuous flow analyzer.
Development and characterization of a small-scale separator and a flow analyzer for near-patient clinical diagnostics is presented including: separator design and characterization, separator and analyzer integration, modeling of carryover in the analyzer, and instrument modifications made to expand
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