نتایج جستجو برای: oxidized mwcnts with nitric acid
تعداد نتایج: 9505386 فیلتر نتایج به سال:
Pt nanoparticles (PtNPs) were synthesized in the presence of a NH(2)-terminated fourth generation poly(amido amine) (PAMAM) dendrimer as a stabilizer at different molar ratios (M:D) of metal precursor to amine terminal group of dendrimer. Subsequently, PtNPs protected by dendrimers (DENPtNPs) were covalently immobilized on multiwalled carbon nanotubes (MWCNTs) by using a condensing agent for am...
introduction acetic acid bacteria are large group of obligate aerobic gram negative bacteria with the ability to oxidize ethanol to acetic acid (1). they are widely distributed in natural habitats and classified in family acetobacteraceae. members of this family are useful in industrial production of vinegar(2). acetic acid bacteria (aab) can use substrates as glucose, ethanol, lactate or glyc...
a novel acrylic acid-functionalized fe3o4 magnetic nanoparticle with a core-shell structure was developed for utilization as a heterogeneous organosuperacid in chemical transformations. the structural, surface, and magnetic characteristics of the nanosized catalyst were investigated by various techniques such as transmission electron microscopy (tem), thermogravimetric analysis (tga), and ft-ir...
Carbon nanotubes (CNTs) based filters have a prospective advantage compared to the commercial due their lightweight and ability work without electricity or heat. The manganese (Mn) removal from aqueous solutions by oxidized multi-walled carbon (O-MWCNTs) was investigated. filtration performance studied under ambient conditions: solution pH, initial concentration, MWCNT-filter mass. samples of M...
In this paper, the multi-walled carbon nanotubes modified screen-printed electrode (MWCNTs/SPE) was prepared and the MWCNTs/SPE was employed for the electrochemical determination of the antioxidant substance chlorogenic acids (CGAs). A pair of well-defined redox peaks of CGA was observed at the MWCNTs/SPE in 0.10 mol/L acetic acid-sodium acetate buffer (pH 6.2) and the electrode process was ads...
An electrochemical route for the decoration of multiwalled carbon nanotubes (MWCNTs) with anisotropic Au nanostructures and the electroanalytical application of decorated MWCNTs are described. MWCNTs were electrochemically decorated with flowers and buds-like Au nanostructures in aqueous solution in the presence of KI. The flowers and buds-like nanostructures had an average size of 80 nm with a...
By grafting with ethylene diamine tetraacetic acid (EDTA), novel multi-walled carbon nanotube nano-composites (EDTA-MWCNTs) have been successfully prepared. The integration of gold nanoparticles (AuNPs) and novel functionalized matrix shows very promising applications in the fabrication of biosensors for sensitive detection of dopamine in the presence of ascorbic acid and uric acid with the com...
Background and purpose: Quick removal of dye from water and waste water is very important in the research related to eliminating pollutions; this is because of the spread of damaging effects of dyes in water on the human beings and the environment. Four different carbon nanostructures, namely graphene oxide, oxidized multiwalled carbon nanotubes, activated carbon, and multiwalled carbon nanotub...
Nitric oxide (NO) modulates plant response by post-translationally modifying proteins, mainly through S-nitrosylation. Ascorbate peroxidase (APX) in the ascorbate-glutathione (AsA-GSH) cycle participates removal of hydrogen peroxide (H2O2). However, relationship between S-nitrosylation and role tomato APX (SlAPX) under nitrate stress is still unclear. In this study, enzyme activity, mRNA expres...
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