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04:27 EST 17th February 2019 | BioPortfolio

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Showing "Global China Gold Nanoparticles Market Research Company Type" PubMed Articles 1–25 of 44,000+

Microtubule network as a potential candidate for targeting by gold nanoparticle-assisted photothermal therapy.

Photothermal therapy is achieving ever-increasing attention as a promising method for killing cancer cells. Although, gold nanoparticles are regarded as one of the most effective photothermal therapy agents, the mechanisms underlying their action have to be addressed. Moreover, studies have showed that gold nanoparticles induce apoptosis in treated cultures. Hence, in this study, we investigated the interaction of folic acid functionalized gold nanoparticles and gold-shelled FeO nanoparticles with microtubu...

Antimicrobial activity and toxicity of gold nanoparticles: research progress, challenges, and prospects.

Gold nanoparticles are emerging materials that exhibit characteristics distinct from those of traditional materials and that have promising potential for application in the fields of chemistry, physics, biology, and medicine. During the past decades, numerous studies on the antimicrobial activity and toxicity of gold nanoparticles have been published. With respect to antimicrobial activity, gold nanoparticles conjugated with small molecules, such as antibiotics, drugs, vaccines, and antibodies, are more eff...

In Situ Formation of Gold Nanoparticles within a Polymer Particle and Their Catalytic Activities in Various Chemical Reactions.

Composite materials consisting of nanoscale gold particles and protective polymer shells were designed and tested as catalysts in various chemical reactions. Initially, the systematic incorporation of multiple gold nanoparticles into a poly(N-isopropylacrylamide) particle was achieved by an in situ method under light irradiation. The degree of gold nanoparticle loading, along with the structural and morphological properties, was examined as a function of the amount of initial gold ions and reducing agent. A...

Gold nanoparticles in cancer treatment.

Colloidal gold has been studied for its potential application in medicine for centuries. However, synthesis and evaluation of various gold nanoparticles have only recently met with a wide interest of scientists. Current studies confirm numerous advantages of nanogold over different nanomaterials, primarily due to highly optimized protocols for production of gold nanoparticles of countless sizes and shapes, featured with unique properties. The possibility to modify the surface of nanogold particles with diff...

Effects of market type and time of purchase on oxidative status and descriptive off-odors and off-flavors of beef in Vietnam.

The objective of the current study was to determine the effects of market type (super market - SM, indoor market - IM, open market - OM) and sampling time (at the opening - T0 and 4 h after the opening - T4) on antioxidant capacity, lipid oxidation, and descriptive sensory attributes of beef in Vietnam. Values of FC and TEAC were greater in OM beef than IM and SM (P 

Recent uses of carbon nanotubes & gold nanoparticles in electrochemistry with application in biosensing: A review.

The innovation of nanoparticles assumes a critical part of encouraging and giving open doors and conceivable outcomes to the headway of new era devices utilized as a part of biosensing. The focused on the quick and legitimate detecting of specific biomolecules using functionalized gold nanoparticles (Au NPs), and carbon nanotubes (CNTs) has turned into a noteworthy research enthusiasm for the most recent decade. Sensors created with gold nanoparticles or carbon nanotubes or in some cases by utilizing both a...

Laser-induced fabrication of porous gold nanoshells.

Pulse-laser irradiation is a promising approach to fabricate gold nanostructures with unique morphologies. Hollow and porous gold nanoshells with high surface-enhanced Raman scattering efficiency have been produced via irradiating SiO2@Au@SiO2 nanoparticles with nanosecond laser pulses; the synthetic strategy mainly relies on the laser-induced surface melting of gold nanoparticles.

Sensitive, simple and rapid colorimetric detection of Malachite green in water, salmon and canned tuna samples based on gold nanoparticles.

Malachite green is used in aquaculture and fisheries as fungicides and antiseptic and it is also used in industry as a dye. However, Malachite green is carcinogenic and highly toxic for human and animal. In this study, a spectrophotometric method was developed to detect Malachite green. The method was based on the surface plasmon resonance property of gold nanoparticles and interaction between malachite green and gold nanoparticles.

Gold nanoparticles of different shape for bicolor lateral flow test.

Spherical gold nanoparticles are the most commonly used marker in lateral flow assays. However, the widespread practice of using identical coloration for the test and control zones of test strips can lead to erroneous interpretations of the assay's results. We propose an immunochromatographic test strip with lines of different colors. For this purpose, gold nanoparticles of different shapes were used, namely blue nanoflowers in the test zone and red gold nanospheres in the control zone. A detailed synthesis...

A translational approach to assess the metabolomic impact of stabilized gold nanoparticles by NMR spectroscopy.

Gold nanoparticles have high potential in the biomedical area, especially in disease diagnosis and treatment. The application of these nanoparticles requires the presence of stabilizers to avoid their agglomeration. Nowadays, there is a lack of reliable methods for characterising the effect of stabilised nanoparticles on biological systems. To this end, in this study, we apply an experimental approach based on nuclear magnetic resonance spectroscopy to study the effect of gold nanoparticles, stabilised with...

Surface plasmon resonance of gold nanoparticles as a colorimetric sensor for indirect detection of Cefixime.

This study reports a colorimetric sensor with excellent sensitivity to detect Cefixime base on gold nanoparticles. Cefixime is an antibiotic which has a wide range of applications in medicine. Cefixime did not change the surface plasmon resonance bond in gold nanoparticles solution; therefore, there was no change in the color solution of gold nanoparticles. The presence of Alizarin Red S in the system was necessary for the degradation of Cefixime, resulting in the aggregation of gold nanoparticles and a col...

Genetic diversity of porcine circovirus type 2 in China between 1999-2017.

Porcine circovirus type 2 (PCV-2), is linked to PCV-2 associated disease, which has caused considerable economic loss in the swine industry. Here, we report the genetic diversity of PCV-2 in China. A total of 74 Chinese PCV-2 strains sequenced between 1999 and 2017 were studied. Based on the ORF2 and complete genomes, we found that apart from the PCV-2a, PCV-2b, and PCV-2d genotypes, two unstable recombination genotypes also exist, referred to as IM1 and IM2 genotypes. We found that the patterns of PCV-2 ge...

Docetaxel-Loaded Hyaluronic Acid-Cathepsin B Cleavable Peptide-Gold Nanoparticles for The Treatment of Cancer.

Gold nanoparticles are widely utilized for medical applications such as drug delivery and as therapeutic and diagnostic agents because of their unique properties. In this study, we prepared docetaxel (DTX)-loaded hyaluronic acid-cleavable peptide-gold nanoparticles for the treatment of cancer by selectively delivering DTX into the tumor, and thus, enhancing the therapeutic effect of DTX; further, we determined synergistic effects of the nanoparticles using laser treatment. The DTX-loaded hyaluronic acid-cle...

Alive attenuated Salmonella as a cargo shuttle for smart carrying of gold nanoparticles to tumor hypoxic regions.

In the present study, alive attenuated Salmonella Typhi Ty21a was introduced as a vehicle for smart delivery of gold nanoparticles to the tumors' hypoxic regions. At the first step, the uptakes of gold nanoparticles with 7 different decorations by S. Typhi Ty21a was investigated using flow cytometry and inductively coupled plasma optical emission spectroscopy. The analyses demonstrated that folic acid functionalized gold nanoparticles (FA-GNPs) are the best candidates for producing the Golden Bacteria (GB)....

The social issue in the BRICS Project.

BRICS, the acronym for Brazil, Russia, India, China and South Africa, is the first multilateral group created and run by non-western developed countries. The group aims to influence world geopolitics and market based on the right of developing and emerging countries to participate equitably in development. The social issue lies at the core of the group's justifications to achieve its goals. In this regard, this paper aims to analyze how the social issue has been addressed by BRICS. The methodology was based...

Enzyme-triggered self-assembly of gold nanoparticles for enhanced retention effects and photothermal therapy of prostate cancer.

A peptide-modified gold nanoparticle was developed for tumour-targeted therapy. Triggered by alkaline phosphatase, the CREKA-YPFFK(Nph) peptide can self-assemble and further result in accumulation of gold nanoparticles in tumour cells. The large-sized gold nanoparticle aggregates cannot escape from the tumour tissue, therefore realizing the goal of tumour-specific targeting, enhanced retention and photothermal effects.

Stabilization of Silver and Gold Nanoparticles: Preservation and Improvement of Plasmonic Functionalities.

Noble metal nanoparticles have been extensively studied to understand and apply their plasmonic responses, upon coupling with electromagnetic radiation, to research areas such as sensing, photocatalysis, electronics, and biomedicine. The plasmonic properties of metal nanoparticles can change significantly with changes in particle size, shape, composition, and arrangement. Thus, stabilization of the fabricated nanoparticles is crucial for preservation of the desired plasmonic behavior. Because plasmonic nano...

Understanding gold nanoparticle dissolution in cyanide-containing solution via impact-chemistry.

The electrochemical dissolution of citrate-capped gold nanoparticles (AuNPs) was studied in cyanide (CN-) containing solutions. It was found that the gold nanoparticles exhibited different dissolution behaviours as ensembles compared to the single particles. At the single particle level, a nearly complete oxidation of 60 nm AuNPs was achieved at concentrations greater than or equal to 35.0 mM CN- and at a potential of 1.0 V. Mechanistic insights and rate data are reported.

Promising therapeutic effect of gold nanoparticles against dinitrobenzene sulfonic acid-induced colitis in rats.

The aim of this study is to evaluate the therapeutic effect of two different doses of naked gold nanoparticles (AuNPs) in the experimental colitis in rats.

Direct electron-beam patterning of transferrable plasmonic gold nanoparticles using a HAuCl/PVP composite resist.

Reliable fabrication of gold nanoparticles with desirable size, geometry and spatial arrangement is essential for plasmonic applications. A common fabrication flow usually involves electron-beam lithography and a vacuum-evaporation-based lift-off process or etching. In this work, we evaluate an alternative approach to directly fabricate a plasmonic gold nanoparticle array without involving the vacuum evaporation process by using a chloroauric acid/poly(vinyl pyrrolidone) (HAuCl4/PVP) hybrid as a functional ...

Analysis of global stock index data during crisis period via complex network approach.

Considerable research has been done on the complex stock market, however, there is very little systematic work on the impact of crisis on global stock markets. For filling in these gaps, we propose a complex network method, which analyzes the effects of the 2008 global financial crisis on global main stock index from 2005 to 2010. Firstly, we construct three weighted networks. The physics-derived technique of minimum spanning tree is utilized to investigate the networks of three stages. Regional clustering ...

Dynamics of breast imaging research: A global scoping review and Sino-Australian comparison case study.

This study presents a quantitative analysis of global breast imaging research over the last eight decades. A dedicated Sino-Australian case study via a social network analysis (SNA) is included as China and Australia have a recent rapidly increasing number of research partnerships and strategic education/economic connections. Bibliographic data was extracted via Scopus and analysed for the social network parameters of degree centrality, closeness centrality, betweenness centrality and multiple cohesion meas...

Effect of peptide-conjugated nanoparticles on cell lines.

Metal nanoparticles are widely used for the delivery and targeting of pharmaceutical, therapeutic and diagnostic agents in cancer therapy in recent years. The multifunctional nanoparticles constructed currently are supposed to show superior effects on cancer cells. This study was conducted to observe the difference between the effect of a biologically important peptide, silver (AgNPs) and gold (AuNPs) nanoparticles and their conjugates on two different cancer cells. Peptide (Boc-L-P-L-OMe) was acquired from...

Nanocomposite of polypyrrol and silica rods-gold nanoparticles core-shell as an ammonia sensor.

Ammonia is widely needed in chemical industry as well as in fertilizers for agriculture. However, in small as well as large quantities it is not only hazardous for human health but also for our ecosystem. Therefore, ammonia sensing at low concentration with high sensitivity, selectivity and low response time as well as recovery time is important. Here, various nanosensors are fabricated using gold nanoparticles (~ 15 nm), silica-gold nanoparticles coreshell particles and coreshell particles embedded in poly...

Tuning Gold Nanoparticles with Chelating Ligands for Highly Efficient Electrocatalytic CO2 Reduction.

We report the capped chelating organic molecules as a design principle for tuning heterogeneous nanoparticles for electrochemical catalysis. Gold nanoparticles (AuNPs) functionalized with a chelating tetradentate porphyrin ligand show a 110-fold enhancement, compared to the oleylamine-coated AuNP, in current density for electrochemical reduction of CO2 to CO in water at an overpotential of 340 mV with Faradaic efficiencies (FEs) of 93%. These catalysts also show excellent stability without deactivation,

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