Design of a Fibrin-Based Vascular Graft Seeded with Blood Outgrowth Endothelial Cells
University of Minnesota Ph.D. dissertation.November 2010. Major: Biomedical Engineering. Advisor: Robert Tranquillo. 1 computer file (PDF); ix, 180 pages.
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Part I: Syntheses, Characterizations, and Investigations of Molecular Micelles and Imidazolium-Based Ionic Liquids for Protein Separations in Electrophoresis PART II: Investigating the Mentoring Canon Through Exploration of Thirty Years of Mentoring by an Exemplar
The research reported in this dissertation is presented in two parts. The first part is the Syntheses, Characterizations, and Investigations of Molecular Micelles and Imidazolium-Based Ionic Liquids for Protein Separations in Electrophoresis, and the second part is a case study entitled Investigating the Mentoring Can…
Tribologie de l'emboutissage - Enjeux, conditions de contact et approches expérimentales
Res problèmes tribologiques rencontrés dans l'emboutissage des tôles sont particulièrement difficiles pour au moins deux raisons : raisons physiques. Ces problèmes concernent les interactions superficielles des matériaux de surface de la tôle et de l'outil entre lesquels viennent s'intercaler certai
Modeling thin film, buckle-driven delamination along a metal/polymer interface in a stressed overlayer test.
Interfacial delamination is often the critical failure mode limiting the performance of polymer/metal interfaces. Consequently methods that measure the toughness of such interfaces are of considerable interest. One approach for measuring the toughness of a polymer/metal interface is to use the stressed-overlayer test.…
Study of the Factors Affecting the Properties of the Tin Powder Produced by the Method of Centrifugal Atomization
The research includes a study for the variables of the process of centrifugalatomization for the purpose of producing pure tin metal powder and the effect ofthese variables in the properties of the resulting powder. These variables are:1. The speed of rotation in the rotating part.2. The medium of cooling.3. The tempe…
SAVING ALLOYING OF SLEEVE CAST IRON WITH COPPER
The way of alloying of sleeve cast iron with copper is offered. This technology will enable not only to stabilize of qualitative characteristics of cast slugs, but to reduce the expenses for alloying due to using of secondary materials as well.
INFLUENCE OF THE SURFACE-ACTIVE COMPONENT OF COMPLEX MODIFIER ON THE STRUCTURE OF LOW-CARBON STEEL
The influence of surface-active component of complex modifier on structure of low-carbon steel is shown. It is determined that the complex modifier, containing carbideforming and surface-active components, influences more effectively on macro- and microstructure of low-carbon steel.
Síntesis sonoquímica de nanopartículas de CuO impregnadas en tejidos de algodón: Caracterización y actividad antimicrobiana
Aplicando ultrasonido a tejidos de algodón, en una solución de sulfato de cobre, se obtuvo nanopartículas de óxido de cobre impregnadas en el tejido. Las caracterizaciones por difracción de electrones muestran que el material formado consiste de las fases Cu-64O, Cu-4O y CuO, mientras que por difracción de rayos X se…
Wasserstandsberechnung für gegliederte Oberflächen mit variablen Rauheiten bei extremen Niederschlagsintensitäten
Fur die numerische Simulation von Wasserstandshohen auf befestigten Flachen wurde ein Ansatz entwickelt, der die Rauheit in Abhangigkeit von der Regenintensitat und von den Stromungsbedingungen beschreibt. Auf gegliederten Querschnitten, wie beispielsweise Verkehrsflachen mit Entwasserungsrillen, unterscheidet sich de…
Finemet Thin Films Substituted by Chromium - CEMS and MOKE Study
Conversion electron Mssbauer spectroscopy and magneto-optical Kerr effect were applied to investigate hyperfine interactions and macroscopic magnetic properties of Finemet-type thin films. Phase analysis as well as compositional evolution of hyperfine parameters and coercivity was performed in the range of chromium pe…
Uygulamalı Bilimler ve Mühendislik
Bu çalışma 0,1 M sülfürik asit içinde düşük karbon çeliğinin (LCS) korozyon direncini arttırmak için benzotriazol (Bt) ve yeni sentezlenen N-mesil benzotriazol (BtSO2CH3) kullanımını incelemektedir. LCS’nin korozyon davranışına karşı Bt ve BtSO2CH3’ün inhibitör etkisi, elektrokimyasal empedans spektroskopisi (EIS), po…
Electromechanical TiO2 Nanogenerators
We have developed a nanogenerator that is driven by mechanical forces to produce continuous direct-current output. The nanogenerator was fabricated with titanium dioxide nanoparticle arrays that were placed beneath a conducting electrode with a small gap. The force drives the electrode up and down to bend and/or vibra…
Neutron emission effects on fragment mass and kinetic energy distribution from fission of Pu-239 induced by thermal neutrons
The average of fragment kinetic energy ( ) and the multiplicity of prompt neutrons (v) as a function of fragment mass (m*), as well as the fragment mass yield (Y (m*)) from thermal neutron induced fission of Pu-239, have been measured by Tsuchiya et al. In that work the mass and kinetic energy are calculated from the m…
ПРИЧИНЫ СНИЖЕНИЯ ЭФФЕКТИВНОСТИ ВОДОГАЗОВОГО ВОЗДЕЙСТВИЯ В УСЛОВИЯХ КОЛЛЕКТОРА С ГИДРОФИЛЬНЫМИ СВОЙСТВАМИ ПОВЕРХНОСТИ
There is analysis of reasons of WAG process efficiency reducing in case of collector with water-wet surface in this article. Theoretical principles analyzing of reducing was made. Results of WAG and SWAG processes laboratory investigation for collector with water-wet surface are given.
Surrogate measurement of the 238 Pu(n, f) cross section
The neutron-induced fission cross section of 238 Pu was determined using the surrogate ratio method. The (n,f) cross section over an equivalent neutron energy range 5‐20 MeV was deduced from inelastic α-induced fission reactions on 239 Pu, with 235 U(α, α � f )a nd 236 U(α, α � f) used as references. These reference r…
Measurement of mechanical properties in aging skin [abstract]
Several molecular and structural changes, occurring as a result of intrinsic change and extrinsic damage, are seen in aging skin. The most pronounced transformations seen are vascular atrophy, decreased collagen and elastic fiber content, loss of hydration, as well as a disordered dermal matrix. Currently, it is diffi…
Process Development for ICP Patterning of Through-wafer Periodic Micro-Pores in Silicon Wafers
Silicon has been the material of choice in the semiconductor industry since the last 50 years.Silicon etching forms an essential step in the fabrication of micro-electro-mechanical-systems, more commonly known as MEMS devices.Advancements in silicon etching have made possible the era of integrated on-chip sensors.An i…
SiOC 박막에서 Si-O 결합의 증가와 유전상수의 관계
ICP-CVD 방법에 의해 제작된 SiOC 박막을 유전상수와 화학적 이동의 상관성에 대하여 조사하였다. SiOC 박막은 플라즈마 에너지에 의해서 해리작용과 재결합작용에 의해서 cross link 구조를 갖게 되는 Si-O 와 C-O 결합으 로 구성된 930~1230 cm-1 영역에서 혼합된 Si-O-C 주 결합으로 이루어졌다. C-O 결합은 1270cm-1에서 보여지는 Si-CH3 결합의 말단부분인 C-H 결합이 전기음성도가 큰 산소에 의해서 끌리는 효과로부터 만들어진 결합이다. 그러 나 Si-O 결합은 Si-CH3 결합이 분해되고 난뒤 2차 이온결합에 의해서 만들…
Complementary Strategies to Promote Mesenchymal Stem Cell Differentiation for Ligament Tissue Engineering
Anterior cruciate ligament (ACL) ruptures and tears are significant orthopedic problems that result in discomfort and limited mobility. Fully functional tissue engineered ligament replacements are promising alternatives to current graft choices for repair of ACL disruptions. The cell-based approach to construct engine…
Facile protein and amino acid substitution reactions and their characterization using thermal, mechanical and optical techniques
The work focused on addressing four main objectives. The first objective was to quantify protein and amino acid substitution reactions. Michael addition reactions were used to modify the amino acids and protein. Amino acids alanine, cysteine, and lysine, and protein ovalbumin (OA) were substituted with different conce…