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Browsing Liberal Arts and Sciences by Subject "Oxidation-Reduction"

Now showing items 1-11 of 11

Bis-functionalized fullerene-dibenzo[18]crown-6 conjugate: synthesis and cation-complexation dependent redox behavior

Smith, Phillip M.; McCarty, Amy L.; Nguyen, Nhu Yen; Zandler, Melvin E.; D'Souza, Francis (Royal Society of Chemistry, 2003-07-21)

A one-step synthesis of bis-pyrrolidine functionalized fullerene-dibenzo[18]crown-6 conjugate and its metal cation complexation to the crown ether entity dependent redox behavior is reported.
Continuous spectrophotometric assays for dopamine beta-monooxygenase based on two novel electron donors: N,N-dimethyl-1,4-phenylenediamine and 2-aminoascorbic acid

Wimalasena, Kandatege; Wimalasena, D. Shyamali (Elsevier, 1991-09-02)

Based on the novel chromophoric electron donors, N,N-dimethyl-1,4-phenylenediamine (DMPD) and 2-amino-2-deoxy-L-ascorbic acid (2-aminoascorbic acid), two sensitive, convenient, and continuous spectrophotometric assays for ...
Enhanced photocurrents via redox modulation by fluoride binding to oxoporphyrinogen in a zinc porphyrin-oxoporphyrinogen surface modified TiO2 supramolecular solar cell

Subbaiyan, Navaneetha K.; Hill, Jonathan P.; Ariga, Katsuhiko; Fukuzumi, Shunichi; D'Souza, Francis (Royal Society of Chemistry, 2011-06-07)

A novel approach for improving photocurrent in a supramolecular solar cell, composed of zinc porphyrin-oxoporphyrinogen (ZnP-OxP) surface-modified TiO(2), by redox tuning through fluoride anion binding to the redox active ...
Evidence for two folding domains in glycoprotein hormone alpha-subunits

Bousfield, George R.; Ward, D. N. (The Endocrine Society, 1994-08)

We reconstituted ovine (o) LH alpha from its amino- and carboxyl-terminal fragments obtained as follows. oLH alpha was nicked at Arg46-Ser47 with Arg-C protease. Nicked oLH alpha disulfide bonds were broken by sulfitolysis, ...
Immobilization and electrochemical redox behavior of cytochrome c on fullerene film-modified electrodes

D'Souza, Francis; Rogers, Lisa M.; O'Dell, Erin S.; Kochman, Agnieszka; Kutner, Wlodzimierz (Elsevier, 2005-04-01)

Two different fullerene film-modified electrodes were prepared and used for surface immobilization and electrochemical property investigation of horse heart cytochrome c (cyt c). Both a pristine fullerene film and ...
Molecular triads composed of ferrocene, C60, and nitroaromatic entities: electrochemical, computational, and photochemical investigations

Zandler, Melvin E.; Smith, Phillip M.; Fujitsuka, Mamoru; Ito, Osamu; D'Souza, Francis (John Wiley and Sons, 2002-12-27)

Synthesis and physicochemical characterization of a series of molecular triads composed of ferrocene, C(60), and nitroaromatic entities are reported. Electrochemical studies revealed multiple redox processes involving all ...
P(450)/NADPH/O(2)- and P(450)/PhIO-catalyzed N-dealkylations are mechanistically distinct

Bhakta, Mehul N.; Hollenberg, Paul F.; Wimalasena, Kandatege (American Chemical Society, 2005-02-09)

A high-valent iron-oxo species analogous to the compound I of peroxidases has been thought to be the activated oxygen species in P450-catalyzed reactions. Spectroscopic characterization of the catalytically competent ...
pH-induced alteration and oxidative destruction of heme in purified chromaffin granule cytochrome b(561): implications for the oxidative stress in catecholaminergic neurons

Wanduragala, Srimevan; Wimalasena, D. Shyamali; Haines, Donovan C.; Kahol, Pawan K.; Wimalasena, Kandatege (American Chemical Society, 2003-04-01)

The transmembrane hemoprotein, cytochrome b(561) (b(561)), in the neuroendocrine secretory vesicles is shown to shuttle electrons from the cytosolic ascorbate (Asc) to the intravesicular matrix to provide reducing equivalents ...
Reduction and reoxidation of equine gonadotropin alpha-subunits

Bousfield, George R.; Ward, D. N. (The Endocrine Society, 1992-12)

Ovine (o) and equine (e) LH alpha-subunits were reduced and reoxidized using conditions known to be effective for bovine and human alpha-subunits. The major product of oLH alpha refolding was alpha-subunit monomer. In ...
The reduction of membrane-bound dopamine beta-monooxygenase in resealed chromaffin granule ghosts. Is intragranular ascorbic acid a mediator for extragranular reducing equivalents?

Wimalasena, Kandatege; Wimalasena, D. Shyamali (American Society for Biochemistry and Molecular Biology, 1995-11-17)

The role of internal and external reductants in the dopamine beta-monooxygenase (D beta M)-catalyzed conversion of dopamine to norepinephrine has been investigated in resealed chromaffin granule ghosts. The rate of ...
Substrate specificity of ascorbate oxidase: unexpected similarity to the reduction site of dopamine beta-monooxygenase

Wimalasena, Kandatege; Dharmasena, Silpadipathialage (Elsevier, 1994-09-30)

A series of ascorbate derivatives has been used to examine the specificity of the reduction site of ascorbate oxidase. Replacement of the 6-OH group of ascorbic acid with either hydrogen or bromine does not alter the ...