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Synthesis and Antimicrobial Evaluation of Sulfides, Sulfoxides, and Sulfones
A.B.V. Kiran Kumar,K.S.V. Krishna Rao,M. Subhosh Chandra,M.C.S. Subha,Yong Lark Choi 한국응용생명화학회 2009 Journal of Applied Biological Chemistry (J. Appl. Vol.52 No.1
Hydrogen peroxide, with sodium metavanadate as the catalyst, was used to achieve a highly efficient and selective oxidation of sulfides into sulfoxides and sulfones at room temperature in high yields and short reaction times. All of the sulfides oxidized into sulfoxides and sulfone derivatives were assayed for their in vitro antibacterial activities against Staphylococcus aureus, Bacillus cereus, Escherichia coli, and Pseudomonas aeruginosa, and antifungal activities against Aspergillus niger and Candida albicans. A remarkable inhibition of the growth of the bacterial and fungal strains was observed. This result suggested that the compounds are promising microbial agents. Hydrogen peroxide, with sodium metavanadate as the catalyst, was used to achieve a highly efficient and selective oxidation of sulfides into sulfoxides and sulfones at room temperature in high yields and short reaction times. All of the sulfides oxidized into sulfoxides and sulfone derivatives were assayed for their in vitro antibacterial activities against Staphylococcus aureus, Bacillus cereus, Escherichia coli, and Pseudomonas aeruginosa, and antifungal activities against Aspergillus niger and Candida albicans. A remarkable inhibition of the growth of the bacterial and fungal strains was observed. This result suggested that the compounds are promising microbial agents.
Synthesis and Antimicrobial Evaluation of Sulfides, Sulfoxides, and Sulfones
Kumar, A.B.V. Kiran,Rao, K.S.V. Krishna,Chandra, M. Subhosh,Subha, M.C.S.,Choi, Yong-Lark The Korean Society for Applied Biological Chemistr 2009 Journal of Applied Biological Chemistry (J. Appl. Vol.52 No.1
Hydrogen peroxide, with sodium metavanadate as the catalyst, was used to achieve a highly efficient and selective oxidation of sulfides into sulfoxides and sulfones at room temperature in high yields and short reaction times. All of the sulfides oxidized into sulfoxides and sulfone derivatives were assayed for their in vitro antibacterial activities against Staphylococcus aureus, Bacillus cereus, Escherichia coli, and Pseudomonas aeruginosa, and antifungal activities against Aspergillus niger and Candida albicans. A remarkable inhibition of the growth of the bacterial and fungal strains was observed. This result suggested that the compounds are promising microbial agents.
Ternary Nanocomposite for Solar Light Photocatalyic Degradation of Methyl Orange
Kumar, Akash,Billa, Sanjeev,Chaudhary, Swati,Kiran Kumar, A.B.V.,Ramana, Ch.V.V.,Kim, D. Elsevier 2018 INORGANIC CHEMISTRY COMMUNICATIONS Vol.97 No.-
<P><B>Abstract</B></P> <P>In the present work, we reported the preparation of ZnO/PANI/RGO ternary nanocomposite by physical blending method and its photocatalytic efficiency of degradation of methyl orange under solar light. The samples were characterized by XRD, FTIR and UV–Vis spectroscopy. Optical band gap was calculated using Tauc plot for ZnO, PANI and RGO. The photocatalytic studies were evaluated using Methyl Orange with a degradation rate of 99% in 50 min. It is observed that photocatalytic efficiency enhanced by PANI (wt%). The PANI has the ability to create more charge carriers and delay the recombination process. The kinetic studies fitted to pseudo first order reaction. The nanocomposite acts as a promising photocatalyst for the removal of organic pollutants from water.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Preparation of ZnO/PANI/RGO ternary nanocomposite by physical blending method. </LI> <LI> Photocatalytic degradation of methyl orange under solar light. </LI> <LI> The kinetic studies fitted to pseudo-first order reaction. </LI> <LI> Methyl Orange degradation rate is 99% in 50 minutes. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>Photocatalytic Mechanism of ZnO/PANI/RGO nanocomposite.</P> <P>[DISPLAY OMISSION]</P>
Ambika A. V.,Navya N.,Kiran Kumar S. R.,Suresha B. L. 한국탄소학회 2022 Carbon Letters Vol.32 No.5
The central theme of this work is the synthesis of single-walled carbon nanotubes (SWCNTs) through the chemical vapor deposition method (CVD). Single-walled carbon nanotubes are synthesized using catalyst-chemical vapor deposition of acetylene at 750 °C temperature. X-ray diffraction study gives a characteristic peak (002) at 26.55° corresponding to the existence of carbon nanotube confirms that the particles are crystalline in nature and hexagonal phase. An SEM and HR-TEM outcome gives surface morphology of SWCNTs. The elemental composition was confirmed by EDAX. The ideal concentration of single-walled carbon nanotubes was used to design a novel electrochemical sensor for determining paracetamol (PA) using cyclic voltammetry. Electrochemical determination of paracetamol is described using a single-walled carbon nanotube modified carbon paste electrode (SWCNT/MCPE). The SWCNT/MCPE was used in this study to detect paracetamol electrochemically at pH 7.2 in a 0.2 M PBS with a scan rate of 50 mV s−1. A single-walled nanotube modified carbon paste electrode was used to develop a sensitive and selective electrochemical technique for the detection of PA. The SWCNT/MCPE showed excellent electrocatalytic activity towards the oxidation of paracetamol in phosphate buffer solution. Therefore, with increased oxidation currents, the voltammetric responses of paracetamol at the bare carbon paste electrode are organized within cyclic voltammetric peaks.