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The synthesis and study of poly(N-isopropylacrylamide)/poly(acrylic acid) interpenetrating polymer network nanoparticle hydrogels.

Description: Homogeneous hydrogels made of an interpenetrating network of poly(N-isopropylacrylamide) (PNIPAm) and poly(acrylic acid) (PAAc) are synthesized by a two-step process; first making PNIPAm hydrogels and then interpenetrating acrylic acid throughout the hydrogel through polymerization. The kinetic growth of the IPN is plotted and an equation is fitted to the data. When diluted to certain concentrations in water, the hydrogels show reversible, inverse thermal gelation at about 34°C. This shows u… more
Date: August 2006
Creator: Crouch, Stephen Wallace
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

A review on the modeling and validation of biomass pyrolysis with a focus on product yield and composition

Description: Article reviewing the modeling and verification of products derived from biomass pyrolysis and discussing the possible solutions towards more accurate modeling of biomass pyrolysis.
Date: March 1, 2021
Creator: Xia, Changlei; Cai, Liping; Zhang, Haifeng; Zuo, Lei; Shi, Sheldon & Lam, Su Shiung
Item Type: Refine your search to only Article
Partner: UNT College of Engineering
open access

Kinetics of the Exchange of Nickel-ethylenediaminetetraacetate Ion with Nickelous Ion

Description: The rate of exchange of hydrated nickelous ion with the nickel of nickel ethylenediaminetetraacetate ion has been studied by use of radioactive nickel. Values of the rate constants have been determined at three ionic strengths. Possible mechanisms for the exchange are discussed.
Date: unknown
Creator: Cook, Charles, M., Jr. & Long, F. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Dynamics of Radiation Damage: A Report on Recent Results at BNL

Description: Machine calculations have been made of the dynamics of a set of atoms simulating a crystal undergoing radiation damage. Work on copper is reviewed briefly, and its extension to a simple model of ordered Cu₃Au is described. Investigations of lattice agitation in the wake of a damage event and the extent to which a thermal spike model has validity are discussed. Information on point defects and clusters of point defects in copper is another by-product of the calculations. Recent extensions of the… more
Date: 1962
Creator: Vineyard, George H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Radiation Damage in Graphite. II. Consecutive and Steady State Reactions of Interstitial Complexes

Description: Periodically irradiated and annealed graphites show property changes that are markedly different from the changes after the first irradiation and anneal. Evidence is presented indicating the existence of consecutive reactions between interstitial complexes that lead to steady state concentrations of the intermediate species in a chain. The steady state concentrations result in dimensional recoveries and stored energy releases that do not increase with irradiation as they do in continuously irra… more
Date: 1963
Creator: Schweitzer, Donald G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Can a simple topological-constraints-based model predict the initial dissolution rate of borosilicate and aluminosilicate glasses?

Description: This article, as an alternative route to empirical models, shows that a structural descriptor based on the number of topological constraints per atom can be used to predict the initial dissolution rate of aluminosilicate and borosilicate glasses after being parameterized on different families of glasses (specific series of borosilicate glasses). Results show that, provided that corrections are made for high alkali content glasses that dissolve incongruently (preferential release of Na), the mod… more
Date: March 16, 2020
Creator: Gin, Stéphane; Wang, Mengyi; Bisbrouck, Nicolas; Taron, Mélanie; Lu, Xiaonan; Deng, Lu et al.
Item Type: Refine your search to only Article
Partner: UNT College of Engineering
open access

The Reaction Kinetics of Amino Radicals with Sulfur Dioxide

Description: Abstract: Application of the laser photolysis–laser-induced fluorescence method to the reaction NH2 + SO2 in argon bath gas yields pressure-dependent, third-order kinetics which may be summarized as 𝑘 = (1.49 ± 0.15) × 10^−31 (𝑇/298 K) − 0.83 cm^6 molecule^−2 s^−1 over 292 – 555 K, where the uncertainty is the 95% confidence interval and includes possible systematic errors.The quenching of vibrationally excited NH2 is consistent with a high-pressure limit for NH2 + SO2 of (1.62 ± 0.25) × 10^−11… more
Date: July 10, 2015
Creator: Gao, Yide; Glarborg, Peter & Marshall, Paul
Item Type: Refine your search to only Text
Partner: UNT College of Arts and Sciences
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