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Showing 1 to 12 of 347 entries
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Structural comparison between the open and closed forms of citrate synthase from Thermus thermophilus HB8.

Biophysics and physicobiology

Kanamori E, Kawaguchi S, Kuramitsu S, Kouyama T, Murakami M.
PMID: 27493854
Biophys Physicobiol. 2015 Oct 10;12:47-56. doi: 10.2142/biophysico.12.0_47. eCollection 2015.

The crystal structures of citrate synthase from the thermophilic eubacteria Thermus thermophilus HB8 (TtCS) were determined for an open form at 1.5 Å resolution and for closed form at 2.3 Å resolution, respectively. In the absence of ligands TtCS...

Cysteamine capped CdS quantum dots as a fluorescence sensor for the determination of copper ion exploiting fluorescence enhancement and long-wave spectral shifts.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy

Boonmee C, Noipa T, Tuntulani T, Ngeontae W.
PMID: 27372512
Spectrochim Acta A Mol Biomol Spectrosc. 2016 Dec 05;169:161-8. doi: 10.1016/j.saa.2016.05.007. Epub 2016 May 08.

We described a turn-on fluorescence sensor for the determination of Cu(2+) ions, utilizing the quantum confinement effect of cadmium sulfide quantum dots capped with cysteamine (Cys-CdS QDs). The fluorescence intensity of the Cys-CdS QDs was both enhanced and red...

Changes in intestinal mucosal permeability caused by nonprotein thiol loss in rats.

Pharmaceutical research

Nishihata T, Nghiem BT, Yoshitomi H, Lee CS, Dillsaver M, Higuchi T, Choh R, Suzuka T, Furuya A, Kamada A.
PMID: 24271833
Pharm Res. 1986 Dec;3(6):345-51. doi: 10.1023/A:1016384007304.

The barrier selectivity of the intestinal mucosal membrane permeability may be impaired in certain disease conditions. Membrane permeability was previously shown to be correlated with changes in nonprotein thiol in rat intestinal tissue by the everted sac method. In...

Nano graphene oxide-wrapped gold nanostars as ultrasensitive and stable SERS nanoprobes.

Nanoscale

Jalani G, Cerruti M.
PMID: 25981393
Nanoscale. 2015 Jun 14;7(22):9990-7. doi: 10.1039/c4nr07473d. Epub 2015 May 18.

We report a facile method to synthesize highly branched gold nanostars wrapped with nano graphene oxide (nGO) sheets with or without the addition of Raman dyes, as nanoprobes with high SERS activity. Both cysteamine and nGO are added to...

Versatile Route to Colloidal Stability and Surface Functionalization of Hydrophobic Nanomaterials.

Langmuir : the ACS journal of surfaces and colloids

Culver HR, Steichen SD, Herrera-Alonso M, Peppas NA.
PMID: 27203863
Langmuir. 2016 Jun 07;32(22):5629-36. doi: 10.1021/acs.langmuir.6b00929. Epub 2016 May 26.

We introduce a general method for the stabilization and surface functionalization of hydrophobic nanoparticles using an amphiphilic copolymer, poly(maleic anhydride-alt-1-octadecene)-poly(ethylene glycol) methacrylate (PMAO-PEGMA). Coating nanoparticles with PMAO-PEGMA results in colloidally stable nanoparticles decorated with reactive carboxylic acid and methacrylate...

Achieving Selective and Efficient Electrocatalytic Activity for CO2 Reduction Using Immobilized Silver Nanoparticles.

Journal of the American Chemical Society

Kim C, Jeon HS, Eom T, Jee MS, Kim H, Friend CM, Min BK, Hwang YJ.
PMID: 26447349
J Am Chem Soc. 2015 Nov 04;137(43):13844-50. doi: 10.1021/jacs.5b06568. Epub 2015 Oct 20.

Selective electrochemical reduction of CO2 is one of the most sought-after processes because of the potential to convert a harmful greenhouse gas to a useful chemical. We have discovered that immobilized Ag nanoparticles supported on carbon exhibit enhanced Faradaic...

Formation and stability of manganese-doped ZnS quantum dot monolayers determined by QCM-D and streaming potential measurements.

Journal of colloid and interface science

Oćwieja M, Matras-Postołek K, Maciejewska-Prończuk J, Morga M, Adamczyk Z, Sovinska S, Żaba A, Gajewska M, Król T, Cupiał K, Bredol M.
PMID: 28525826
J Colloid Interface Sci. 2017 Oct 01;503:186-197. doi: 10.1016/j.jcis.2017.04.059. Epub 2017 May 10.

Manganese-doped ZnS quantum dots (QDs) stabilized by cysteamine hydrochloride were successfully synthesized. Their thorough physicochemical characteristics were acquired using UV-Vis absorption and photoluminescence spectroscopy, X-ray diffraction, dynamic light scattering (DLS), transmission electron microscopy (HR-TEM), energy dispersive spectroscopy (EDS) and...

Orthogonal Dual-Triggered Shape-Memory DNA-Based Hydrogels.

Chemistry (Weinheim an der Bergstrasse, Germany)

Yu X, Hu Y, Kahn JS, Cecconello A, Willner I.
PMID: 27490236
Chemistry. 2016 Oct 04;22(41):14504-7. doi: 10.1002/chem.201603653. Epub 2016 Aug 19.

DNA-based shape-memory hydrogels revealing switchable shape recovery in the presence of two orthogonal triggers are described. In one system, a shaped DNA/acrylamide hydrogel is stabilized by duplex nucleic acids and pH-responsive cytosine-rich, i-motif, bridges. Separation of the i-motif bridges...

Oxidation of cysteine to cystine by membrane fractions of Chlorella fusca.

Planta

Krämer E, Schmidt A.
PMID: 24258506
Planta. 1984 Mar;160(3):235-41. doi: 10.1007/BF00402860.

Isolated membrane fractions of Chlorella fusca 211-8b obtained by french-press treatment and sonication catalyzed the oxidation of L-cysteine to L-cystine. The pH-optimum of this reaction was determined to be around 8-8.5 and a stoichiometry of 4 SH-groups oxidized for...

Value of the Debris of Reduction Sculpture: Thiol Etching of Au Nanoclusters for Preparing Water-Soluble and Aggregation-Induced Emission-Active Au(I) Complexes as Phosphorescent Copper Ion Sensor.

Analytical chemistry

Shu T, Su L, Wang J, Lu X, Liang F, Li C, Zhang X.
PMID: 27175974
Anal Chem. 2016 Jun 07;88(11):6071-7. doi: 10.1021/acs.analchem.6b01450. Epub 2016 May 19.

Chemical etching of gold by thiols has been known to be capable of generating nonluminescent gold(I) complexes, e.g., in size-focusing synthesis of atomically precise gold nanoclusters (GNCs). These nonluminescent gold(I) complexes have usually been considered as useless or worthless...

Binding of Biotin to Gold Surfaces Functionalized by Self-Assembled Monolayers of Cystamine and Cysteamine: Combined FT-IRRAS and XPS Characterization.

Journal of colloid and interface science

Yam CM, Pradier CM, Salmain M, Marcus P, Jaouen G.
PMID: 11237457
J Colloid Interface Sci. 2001 Mar 01;235(1):183-189. doi: 10.1006/jcis.2000.7362.

As part of our project of developing a new IR-based immunosensor, we investigated the functionalization of gold substrates with thin organic films containing biotin ligands. A two-step procedure was developed consisting of the chemisorption of short amine-terminated organosulfur compounds,...

Glial HO-1 expression, iron deposition and oxidative stress in neurodegenerative diseases.

Neurotoxicity research

Schipper HM.
PMID: 12835114
Neurotox Res. 1999 Sep;1(1):57-70. doi: 10.1007/BF03033339.

The mechanisms responsible for the pathological deposition of brain iron in Parkinson's disease, Alzheimer's disease and other human neurodegenerative disorders remain poorly understood. In rat primary astrocyte cultures, we demonstrated that dopamine, cysteamine, H(2)O(2) and menadione rapidly induce heme...

Showing 1 to 12 of 347 entries