نتایج جستجو برای: aqueous chemical synthesis

تعداد نتایج: 832311  

A. K. Tyagi, C. Sudakar F. Syed J. Majeed, M. S. R. Rao O. D. Jayakumar P. S. V. Mocherla

We report the direct soft chemical synthesis and characterization of a family of face centered cubic (fcc) and partially ordered face centered tetragonal (fct) FePt nanoparticles (NPs) suitable for biomedical applications. Both fcc and partially ordered fct-FePt NPs are synthesized by employing a simple polyol method. By using polyvinyl pyrolidone (PVP) as a stabilizer in various ratios during ...

Nowadays green synthesis of metal nanoparticles is a developing area of research. In this study, titanium dioxide nanoparticles were biosynthesized using an aqueous solution of Echinacea purpurea herba extract as a bioreductant. This is novel and interesting method for synthesis of TiO2 nanoparticles. The prepared titanium dioxide nanoparticles were characterized using ultraviolet–visible spect...

Journal: Journal of Nanoanalysis 2017
Gholamreza Amin, Nooshin Amini, Zahra Jafari Azar

Nanoparticles bio production, considering their performance in medicine and biologicalscience, is increasing; also, raising awareness of green chemistry and bioprocesses hasencouraged the use of environmentally friendly methods for the production of non-toxicnanomaterials.. Also uses of plant extracts are found to be more advantageous over chemical,physical and microbial (bacterial, fungal, alg...

Nowadays green synthesis of metal nanoparticles is a developing area of research. In this study, titanium dioxide nanoparticles were biosynthesized using an aqueous solution of Echinacea purpurea herba extract as a bioreductant. This is novel and interesting method for synthesis of TiO2 nanoparticles. The prepared titanium dioxide nanoparticles were characterized using ultraviolet–visible spect...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2011
Shiying Shang Zhongping Tan Samuel J Danishefsky

The power of chemical synthesis of large cysteine-free polypeptides has been significantly enhanced through the use of nonproteogenic constructs which bear strategically placed thiol groups, enabling native chemical ligation. Central to these much expanded capabilities is the specific, radical-induced, metal-free dethiolation, which can be accomplished in aqueous medium.

Journal: :Topics in current chemistry 2015
Laurent Raibaut Ouafâa El Mahdi Oleg Melnyk

The chemical synthesis of peptides or small proteins is often an important step in many research projects and has stimulated the development of numerous chemical methodologies. The aim of this review is to give a substantial overview of the solid phase methods developed for the production or purification of polypeptides. The solid phase peptide synthesis (SPPS) technique has facilitated conside...

2014
Surajit Das Samir Kumar Patra

Nanomaterials are the leading edge to the rapidly developing nanotechnology. For the synthesis of nanomaterials over a wide range of chemical composition, the development of reliable and efficient methods is a challenging issue in nanotechnology. In context to this green synthesis of nanoparticles using biological systems, plant products and microorganisms are potentially considerable because o...

Journal: :chemistry of solid materials 2015
shahab shariati maryam khabazipour

in  this  study,  amino  functional  groups  were  chemically  bonded  to  the  surface  of  newly synthesized  kit-6  mesoporous  magnetite  nanoparticles  (mmnps)  by  post-toluene  reflux synthesis method.  this method  treats  calcined mesoporous  nanoparticles with  the  functional organosilanes.  physical  and  chemical  structures  of  the  synthesized  mesoporous  magnetite nanoparticle...

The biogenic synthesis of metal nanomaterial offers an environmentally benign alternative to the traditional chemical synthesis routes. In the present study, the green synthesis of silver nanoparticles (AgNPs) from aqueous solution of silver nitrate (AgNO3) by using Nigella arvensis L. seed powder extract (NSPE) has been reported. AgNPs were characterized by UV–vis absorption spectroscopy with ...

The biogenic synthesis of metal nanomaterial offers an environmentally benign alternative to the traditional chemical synthesis routes. In the present study, the green synthesis of silver nanoparticles (AgNPs) from aqueous solution of silver nitrate (AgNO3) by using Nigella arvensis L. seed powder extract (NSPE) has been reported. AgNPs were characterized by UV–vis absorption spectroscopy with ...

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