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Synthesis and Characterization of Carboxylate-Modified Gold Nanoparticle Powders Dispersible in Water
Carboxylate-modified gold nanoparticles have been synthesized in a single-phase system based on the reduction of hydrogen tetrachloroaurate(III) by sodium borohydride in methanol using… Expand
Synthesis of Thiolate-Stabilized Platinum Nanoparticles in Protolytic Solvents as Isolable Colloids
Water-dispersible, isolable thiolate-stabilized platinum nanoparticles are synthesized by two one-phase methods: one is conducted in water; another mainly in methanol, through the reduction of… Expand
pH-dependent unfolding of aspergillopepsin II studied by small-angle X-ray scattering.
Aspergillopepsin II (EC 18.104.22.168) secreted from the fungus Aspergillus niger var. macrosporus is a non-pepsin-type acid proteinase. It consists of two polypeptide chains (i.e., a heavy chain and a… Expand
Induced Optical Activity in Boronic-Acid-Protected Silver Nanoclusters by Complexation with Chiral Fructose†
Silver nanoclusters protected by achiral 3-mercaptophenylboronic acid (3-MPB) with a mean core diameter of about 0.8 nm are successfully synthesized. Addition of chiral d- or l-fructose into the… Expand
Organic Nanoparticles of Cyanine Dye in Aqueous Solution
Ion-based organic dye nanoparticles ranging from tens to hundreds of nanometers have been prepared in aqueous solution. The synthetic approach is based on "ion-association" (hydrophobic ion-pair… Expand
Field Emission Scanning Electron Microscopy for Structural Characterization of 3 D Gold Nanoparticle Superlattices
We prepared micrometer-sized three-dimensional (3D) superlattices of gold nanoparticles protected by Nacetylglutathione (NAG). The nanoparticles were self-assembled at an air/water interface under a… Expand
Large optical activity of gold nanocluster enantiomers induced by a pair of optically active penicillamines.
- H. Yao, K. Miki, N. Nishida, Akito Sasaki, K. Kimura
- Chemistry, Medicine
- Journal of the American Chemical Society
- 13 October 2005
We have succeeded for the first time in preparing a pair of gold nanocluster enantiomers protected by optically active thiols: D- and L-penicillamine (D-Pen and L-Pen). Circular dichroism (CD)… Expand
Stimulation of transcription in cultured cells by high mobility group protein 1: essential role of the acidic carboxyl-terminal region.
- S. Aizawa, H. Nishino, K. Saito, K. Kimura, H. Shirakawa, M. Yoshida
- Chemistry, Medicine
- 13 December 1994
Several in vitro studies have suggested that high mobility group (HMG) protein 1 has a role in gene regulation as a trans activator or quasi-transcription factor. However, data on the molecular… Expand
Synthesis and Chiroptical Study of D/L-Penicillamine-Capped Silver Nanoclusters
We report the synthesis and chiroptical properties of silver nanocluster enantiomers. The surface of the silver nanoclusters is covered with l/d-penicillamine or their racemate. The clusters are… Expand
Reversible Transference of Au Nanoparticles across the Water and Toluene Interface: A Langmuir Type Adsorption Mechanism
A novel method to reversibly modify the surface of gold nanoparticles is developed through electrostatic interaction between cationic tetraoctylammonium surfactant and anionic carboxylate groups. The… Expand