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Crosslinking and network formation in a model polymeric systemSeymour, J. E. January 1987 (has links)
No description available.
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The lithographic behaviour and the mechanisms of radiation-induced crosslinking and main-chain scission of chlorinated polymethylstyrenesMatsubayashi, Yoshiaki January 1989 (has links)
No description available.
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Characterization of UV-crosslinked protein-nucleic acid interfaces by Maldi MS and ESI MS/MSGafken, Philip R. 02 October 2000 (has links)
Graduation date: 2001
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Characterization of photochemically cross-linked protein-nucleic acid complexes by mass spectrometryJensen, Ole Norregaard 20 October 1994 (has links)
A novel protocol for the study of protein-nucleic acid interactions is presented and demonstrated
to be feasible. The protocol combines photochemical crosslinking techniques and mass
spectrometric methods into a new strategy for identifying protein domains or amino acid residues
that are in close contact with nucleic acid in protein-nucleic acid complexes. Identifying nucleic
acid binding domains in proteins provides a starting point for understanding structure-function
relationships in protein-nucleic acid complexes.
The protocol can be divided into three parts: 1) Cross linking of the protein-nucleic acid complex
by irradiation with ultraviolet light and subsequently verifying the crosslinking by mass
spectrometry; 2) Mass spectrometric peptide mapping of crosslinked protein-nucleic acid
complexes to identify crosslinked peptide-nucleic acid hybrids; 3) Tandem mass spectrometric
sequencing of peptide-nucleic acid hybrids to localize the crosslinked amino acid residue(s).
The experimental data described in this dissertation documents our efforts to establish and
implement this analytical protocol. Using several different protein-nucleic acid systems and
different crosslinking techniques, we have demonstrated the feasibility of a mass spectrometric
based approach to structurally characterize UV-crosslinked protein-nucleic acid complexes.
Matrix-assisted laser desorption/ionization mass spectrometry was for the first time demonstrated
to be highly effective for detection and molecular weight determination of intact, UV-crosslinked
protein-nucleic acid complexes and for molecular weight determination of synthetic and UV-crosslinked
peptide-nucleic acid hybrids. Electrospray ionization mass spectrometry and tandem
mass spectrometry was demonstrated to be effective for analysis of synthetic peptide-nucleic acid
hybrids and, in conjunction with HPLC, for peptide mapping of a protein. The first application of
MALDI mass spectrometry to the characterization of crosslinked peptide-nucleic acid hybrids
isolated from a photochemically crosslinked protein-nucleic acid complex demonstrate that the
new protocol can be used to identify nucleic acid binding domains in proteins. / Graduation date: 1995
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Photocrosslinking of polyesters with phenylene bisacrylate groupsVargas, Marian 05 1900 (has links)
No description available.
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Modification of poly(ethylene terephthalate) through thermal and photochemical crosslinkingJones, Jeffrey R. 08 1900 (has links)
No description available.
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Cross linking molecular systems to form ultrathin dielectric layersFeng, Danqin January 1900 (has links)
Thesis (Ph.D.)--University of Nebraska-Lincoln, 2007. / Title from title screen (site viewed Nov. 9, 2007). PDF text: iv, 129 p. : ill. ; 5 Mb. UMI publication number: AAT 3266778. Includes bibliographical references. Also available in microfilm and microfiche formats.
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Crosslinking do colágeno corneano em pacientes com ceratocone: resultados preliminaresLuis Vilaça Torres Pinto, João 31 January 2010 (has links)
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Previous issue date: 2010 / Objetivos: Avaliar os resultados obtidos de pacientes portadores de ceratocone na forma
inicial ou moderado, em fase de evolução, submetidos ao tratamento com a técnica do crosslinking
do colágeno utilizando parâmetros reprodutíveis de concentração de riboflavina em
gotas e exposição corneana aos raios ultra-violeta .
Métodos: Em um estudo prospectivo, foram submetidos ao tratamento com crosslinking do
colágeno 24 olhos de 24 pacientes, 13 do sexo feminino e 11 do sexo masculino. A idade
média das mulheres foi 24,08 anos e dos homens de 21,27 anos. Quanto ao grau de
ceratocone, 16 pacientes apresentavam ceratocone grau I e os outros 8 pacientes com
ceratocone grau II. Foram tratados no período de dezembro de 2008 a abril de 2009 e
acompanhados por um período de 6 meses com avaliações mensais da ceratometria ,
paquimetria pelo exame do ORBSCAN e AVCC ( acuidade visual com correção ) e refração
( avaliação do grau ).
Resultados: Ao final do tratamento observou uma melhora estatisticamente significante ( p <
0,05 ) nas médias da ceratometria máxima (Kmáx), ceratometria média (Kmédio), AVCC
( acuidade visual com correção), paquimetria ( espessura da córnea ) e equivalente esférico.
A média da acuidade visual corrigida com óculos (AVCC) antes do tratamento foi de 0.38
logMAR (20/50) com desvio padrão de ± 0,172 e no final do tratamento foi de 0.22 logMAR
( 20/30 ) com DP(desvio padrão) de ± 0,153 . Observamos também que a média do Kmédio
antes do tratamento era 47.30 D com DP 2,723 e 6 meses após o tratamento diminuiu para
46.00 D com DP 2,595 o que confirma o aplanamento corneano com diminuição média de
1,30 D(dioptrias).
Conclusão: O tratamento do crosslinking mostrou resultados significativamente positivos
nos pacientes tratados principalmente nos pacientes portadores de ceratocone grau I .
Concluímos que houve diferença significante entre a acuidade visual antes e pós-tratamento
com melhora da visão
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Indentation protocol to determine viscoelastic properties of cartilage before and after crosslinkingChandwadkar, Shaunak A. 12 1900 (has links)
Indiana University-Purdue University Indianapolis (IUPUI) / Osteoarthritis affects millions of people of different age groups around the world.
With very few treatment options and the highly restricted capacity of cartilage to
repair, new treatment options are needed. The objective of this thesis was to develop
a repeatable cartilage testing protocol, which could be used to test cartilage properties
and determine if crosslinking can be used as a potential treatment for osteoarthritis.
Previous studies have shown CASPc can be used as a photo-sensitizer to obtain
collagen crosslinking through a secondary process. The ability to perform cartilage
crosslinking by light-activation, which could be done arthroscopically is especially
attractive as this would allow the surgery to be minimally invasive.
The indentation protocol developed for a stress-relaxation test was able to achieve
95% repeatability, meaning the error in determining cartilage properties stayed within
5% of the average for tests performed at different times. Results of photo-chemical
crosslinking demonstrated no change in cartilage stiffness when compared with control
specimens. The spherical indenter chosen to indent the cartilage was suspected to
apply less strain on cartilage as a result of its profile, which only compressed the
cartilage instead of stretching its surface. The stiffness of CASPc control specimen
was observed to be increasing when compared with no-CASPc control, as a result of
added viscosity of CASPc solution. This elevated stiffness was observed to diminish
over time due to the diffusion of CASPc from cartilage.
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Polymerization-Crosslinking Fabric Finishing, With Pad-Dry-Cure, Using Nonformaldehyde Btca/IA/AA Combinations to Impart Durable Press Properties in Cotton FabricKittinaovarut, Siriwan 26 October 1998 (has links)
This study examined the mechanical and durable press properties of cotton 3/1 twill-woven fabrics finished with various concentrations of reactants in the BTCA/IA/AA combinations. The regression analysis was used to determine the relationship among each finishing variable, BTCA, IA, and AA concentrations, mole ratio of acid monomers to the sodium hypophosphite monohydrate catalyst, and curing times at 180°C, and the finished fabric's property variable, breaking strength, tear strength, wrinkle recovery angle whiteness index, and durable press rating. Based on the results of the reduced regression equations and range dispersion of mean values of finished fabric properties. The results of the study indicated the some BTCA/IA/AA combinations applied to cotton fabric provided good results in wrinkle recovery angle, breaking strength, and tear strength, comparable to those of the fabric finished with either BTCA only or DMDHEU reactant. The combinations of BTCA/IA/AA reactants did not provide as good whiteness index and durable press rating as the BTCA or DMDHEU reactant. / Ph. D.
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