Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 47 for “"Induction Period"”.
-
Effect of Laser Induced Crystallinity Modification on Degradation and Drug Release of Biodegradable Polymer
… Polymer degradation exhibits an undesirable induction period, during which a limited amount of embedded drug is released. As a semi-crystalline polymer, PLLA degradation and drug release are affected by its crystallinity. Control over PLLA crystallinity tailors drug release over time, and …
-
An investigation into the behaviour, kinetics & mechanisms involved in the precipitation of a moderately soluble system
… kinetics and (iii) Determination of the induction period.
-
ORGANOMETALLIC AND PHOTOCHEMISTRY OF CERIUM AND THORIUM COMPLEXES AND PHOTOCATALYTIC SYSTEMS FOR THE GENERATION OF CHLORINE RADICALS.
… or an oxygenation reaction for utilization. An induction period When using cerium(III) pre-catalyst, an induction period was discussedobserved using cerium(III) pre-catalyst,. Aand alcohols can assist cerium(IV) catalyst generation duringin the induction period for cerium(IV) catalyst …
-
A Study of Crystallization in Bisphenol-A Polycarbonate
… This study employed BAPC because of the long induction period, a direct result of the slow crystallization kinetics. During the induction period of polycarbonate crystallized at 190°C there was no evidence of polymer chain ordering that was seen in literature for other polymers. The length of …
-
Characteristics of heat transfer fouling of thin stillage using model thin stillage and evaporator concentrates
… thin stillage were linear with time but no induction periods were observed. Fouling rates for concentrated thin stillage were higher compared to commercial thin stillage due to the increase in solid concentration. Fouling rates for oil skimmed and unskimmed concentrated thin stillage were …
-
Metal Complex Photo-activators for the Time-Controlled, Photo-Oxidation of Polyolefins
… FDMC) alone. During U.V. irradiation, both the induction period and the rate of photo-oxidation can be varied independently. It seems that the stabilizer concentration primarily determines the length of the induction period, while the activator concentration controls the slope of the …
-
Adhesion/Diffusion Barrier Layers for Copper Integration: Carbon-Silicon Polymer Films and Tantalum Substrates
… substrate at 1100 K occurs only after a 5-minute induction period. This induction period increases to 10 min for partially oxidized Ta, 15 min for carbidic Ta and 20 min for fully oxidized Ta.
-
The Accelerated Photo-Degradation of Low Density Polyethylene
… hand, were powerful activators proceeded by an induction period. They were also thermal stabilizers during processing. This is consistent with the view previously put forward that believed as peroxide-decomposing anti-oxidants during processing and initially, on uv-irradiation. The high rate of …
-
The study of pretreatment options for composite fouling of reverse osmosis membranes used in water treatment and production
… the rate of silica polymerization and its induction period. Agitation did increased silica solubility; however, its effect was negligible in presence of polyvalent cations. Alkalization of water solution by coagulants particularly sodium hydroxide was found suitable for silica removal …
-
Part I. Synthesis and thermolysis of cyclopentadienyl and pentamethylcyclopentadienyl molybdenum dioxo alkoxides. Part II. Structural characterization of polysilicate intermediates formed during sol-gel polymerization
… in CD$\sb3$CN produced, after a ten minute induction period in which no organic products were observed, equal amounts of acetone and 2-propanol. Thermolysis of CpMoO$\sb2$(OCH$\sb2$CH$\sb3$) produced ethanol and very small amounts of acetaldehyde. Acetaldehyde was found to react readily with …
-
The thermal decomposition of unirradiated and irradiated lithium azide
… that discrete nuclei are formed over the induction period which then grow two-dimensionally over the acceleratory period. The nuclei increase in number linearly with time and overlap and ingestion of the nuclei occurs during the acceleratory period. This was shown by the applicability of …
-
Polymer Crystallization: Polycarbonate and Polybutene-1
… revealed that crystallization, after an initial induction period, increased in rate with increasing temperature and decreasing molecular weight. A double melting peak, in the range of 210-235$\sp\circ$C was also found by DSC, this behavior was attributed to two populations of crystals differing …
-
A study of the vapour phase pyrolysis and alkaline hydrolysis of chloroform
… with respect to chloroform, and exhibited an induction period. Carrying out the reaction in a carbonised tube resulted in a faster reaction, and an increase in the induction period. To account for the results obtained, a mechanism is suggested which involves the formation of a carbon polymer …
-
Investigating the efficacy of pomegranate extract as an antioxidant in multiple high-lipid model systems
… looking at each compounds ability to prolong the induction period of oxidation from different prooxidants (heat-, hemoglobin-, and irradiation-induced oxidation). These results improve the understanding of antioxidant capacity in applicable systems, as well as suggest potential mechanisms by which …
-
Evidence for post-transcriptional regulation of induction of NADP- specific glutamate dehydrogenase by accumulation of its mRNA in uninduced synchronous Chlorella cells
… in a linear fashion after 30 min of the induction period. A change in rate of NADP-GDH mRNA accumulation was observed after 30 min of the induction period. The results support the prediction that since the NADP-GDH enzyme is unstable in vivo, during periods of NADP-GDH accumulation, the …
-
Some Aspects of the Oxidative Stability of Cis-1, 4-Polyisoprene Vulcanizates
… cured sulphur vulcanizates were absent and an induction period towards oxidation was noted, The feature responsible for this stability was examined,
-
Studies on the Quality of Soybean Oil: Extraction Method, Soybean Type, and Oxidative Stability
… method demonstrated its ability to determine an induction period index with intact snack food products, such as corn chips, potato chips, dry roasted peanuts, and pork rinds.
-
Oxidative stability and ignition quality of algae derived methyl esters containing varying levels of methyl eicosapentaenoate and methyl docosahexaenoate
… L/h using a Metrohm 743 Rancimat with automatic induction period determination following the EN 14112 Method from the ASTM D6751 and EN 14214 Standards, which call for induction periods of at least three hours and six hours, respectively. Derived Cetane Number testing was conducted using a …
-
Mechanistic studies on metal-catalyzed carbon-nitrogen bond forming reactions
… precatalyst and the amide lead to an extensive induction period which can be attenuated by replacing the Cu(I) precatalyst with a Cu(II) precatalyst. Evidence for the reduction of the Cu(II) precatalyst through the oxidation of the amide is also presented. Furthermore, we demonstrate that a …
Page 1 of 3