scholarly journals SYNTHESIS AND CHARACTERIZATION OF COPOLYMERIC AND TERPOLYMERIC HYDROGEL-SILVER NANOCOMPOSITES BASED ON ACRYLIC ACID, ACRYLAMIDE AND ITACONIC ACID: INVESTIGATION OF THEIR ANTIBACTERIAL ACTIVITY AGAINST GRAM-NEGATIVE BACTERIA

2015 ◽  
Vol 32 (2) ◽  
pp. 509-518 ◽  
Author(s):  
A. Bal ◽  
F. E. Çepni ◽  
Ö. Çakir ◽  
I. Acar ◽  
G. Güçlü
Keyword(s):  
Antibacterial Activity ◽  
Acrylic Acid ◽  
Itaconic Acid ◽  
Synthesis And Characterization ◽  
Gram Negative Bacteria ◽  
Gram Negative ◽  
Silver Nanocomposites

Synthesis and Characterization of Tetrahydropyran-Based Bacterial Topoisomerase Inhibitors with Antibacterial Activity against Gram-Negative Bacteria

2017 ◽  
Vol 60 (9) ◽  
pp. 3776-3794 ◽  
Author(s):  
Jean-Philippe Surivet ◽  
Cornelia Zumbrunn ◽  
Thierry Bruyère ◽  
Daniel Bur ◽  
Christopher Kohl ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Synthesis And Characterization ◽  
Gram Negative Bacteria ◽  
Topoisomerase Inhibitors ◽  
Gram Negative

Synthesis, Characterization, and Antibacterial Evaluation of Curcumin-Sulfanilamide Compound

2020 ◽  
Vol 840 ◽  
pp. 265-269
Author(s):  
Nurjanah Nurjanah ◽  
Endang Saepudin
Keyword(s):  
Antibacterial Activity ◽  
Functional Group ◽  
Biological Activities ◽  
Curcuma Longa ◽  
Gram Negative Bacteria ◽  
Gram Negative ◽  
E Coli ◽  
Gram Positive Bacteria ◽  
Ftir Spectrophotometry

Curcumin, a diarylheptanoids compound which isolated primary from Curcuma longa, exhibits a variety of exciting biological activities, including as an antibacterial agent. In the present study, a sulfanilamide-contained curcumin compound was synthesized and characterized to investigate the antibacterial activity against gram-positive bacteria S. aureus, B. subtilis and gram-negative bacteria E. coli. The characterization of the synthesized compound was determined by analysing peak absorbance, functional group, and molecular weight using mass spectroscopy, UV/Vis and FTIR spectrophotometry. Curcumin-sulfanilamide compound exhibited the best antibacterial activity against gram-negative bacteria compared to curcumin and the curcumin-derived compound containing isoxazole with inhibitory zone of 11 mm.

Al2O3 Nanopowders, a Suitable Compound for Active Control of Biofouling

2015 ◽  
Vol 32 ◽  
pp. 71-80
Author(s):  
Mohsen Mehregan ◽  
Hossein Soltaninejad ◽  
Behnaz Toluei Nia ◽  
Hadi Zare-Zardini ◽  
Masoud Zare-Shehneh ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Antibacterial Activity ◽  
Blood Cells ◽  
Gram Negative Bacteria ◽  
Bacterial Strains ◽  
X Ray Diffraction ◽  
Gram Positive ◽  
Gram Negative ◽  
X Ray

The formation of biofilm (Biofouling) in different surface is the great concern in types of fields, especially in medical and health system as well as in membrane technology. The present study deals with the synthesis and characterization of Al2O3 nanopowders with antibacterial activity which can be a potentially utilized material for biocompatible implants. Nanostructure was synthesized based on sol-gel method and then, crystallite size, and microstructural and morphological characterization of nanostructure were determined by X-ray diffraction, electron-microscopic techniques - scanning electron microscopy (SEM) and transmission electron microscopy (TEM). According to X-ray diffraction, the value of particle size for Al2O3 nanopowders is 20.85 nm. In the following, the antibacterial activity of Al2O3 nanoparticles was assessed on three gram positive and three gram negative bacteria by radial diffusion assay and measurement of minimum inhibitory concentration (MIC). The toxicity of Al2O3 nanopowders on blood cells was also assessed. The results showed that this nanostructure has potent antibacterial activity against gram positive and gram negative bacteria. The synthesized Al2O3 nanopowders showed the antimicrobial activity against antibiotic resistant bacterium, Staphylococcus aureus. Significant antibacterial activity of this nanostructure was seen to have a greatest effect on Bacillus cereus with the MIC value of 9.2 μg/ml; while, among bacterial strains, Salmonellatyphimurium was investigated to be the most resistant one with the MIC of 35.6 μg/ml. Al2O3 nanopowders showed no toxicity on blood cells. according to acquired data in this study, Al2O3 nanopowders may be a good material for inhibition of biofilm formation.

scholarly journals Synthesis and characterization of new copper(II) complex compounds with chlorhexidine. Part I

2010 ◽  
Vol 8 (3) ◽  
pp. 543-549 ◽  
Author(s):  
Mirela Călinescu ◽  
Ticuţa Negreanu-Pîrjol ◽  
Rodica Georgescu ◽  
Octavian Călinescu
Keyword(s):  
Antimicrobial Activity ◽  
Metal Salt ◽  
Complex Compounds ◽  
Synthesis And Characterization ◽  
Gram Negative Bacteria ◽  
Reaction Conditions ◽  
Gram Negative ◽  
Imine Nitrogen

AbstractThree new copper(II) complex compounds with chlorhexidine diacetate as a ligand have been prepared and characterized by elemental and thermogravimetrical analyses, molar conductances, magnetic susceptibility measurements, infrared, electronic and EPR spectra. The complexes correspond to the formulas: [Cu2(CHX)Cl4]·2C2H5OH, [Cu2(CHX)Br4]·2C2H5OH and [Cu2(CHX)(CH3COO)2] (CH3COO)2·2C2H5OH, where CHX = chlorhexidine, their composition and stereochemistry depending on the reaction conditions and the metal salt used. Chlorhexidine acts as neutral tetradentate NNNN donor, coordinating through the four imine nitrogen atoms. Investigations on antimicrobial activity in vitro show that all the complexes are active against the tested microorganisms, the complex with chloride being more active against Gram negative bacteria than chlorhexidine diacetate..

Functional Modification of Bamboo Rayon (Cellulose) Fabric to Render it Antibacterial and UV Protective

2013 ◽  
Vol 747 ◽  
pp. 509-513 ◽  
Author(s):  
M.D. Teli ◽  
Javed Sheikh
Keyword(s):  
Antibacterial Activity ◽  
Acrylic Acid ◽  
Zno Nanoparticles ◽  
Well Being ◽  
Gram Negative Bacteria ◽  
Gram Positive ◽  
Gram Negative ◽  
Cellulose Fabric ◽  
Bamboo Rayon ◽  
Health And Well Being

In the current study, bamboo rayon fabrics grafted with mixture of acrylic acid and acrylamide was utilized as a backbone to immobilize ZnO nanoprticles. The swollen grafted fabric was treated with ZnCl2 followed by conversion of Zn2+ ions into ZnO nanoparticles. The modified product was characterized using FTIR, TGA and SEM and then evaluated for antibacterial activity against gram positive and gram negative bacteria as well as durability of their antibacterial activity after washing. The product showed antibacterial activity against both types of bacterias which was found to be durable till 40 washes. The modified material also showed improved UV protection because of presence of ZnO nanopartcles. The product can be claimed as suitable sustainable candidate for textile products in health and well being of the users.

scholarly journals Bamboo Rayon-ZnO Nanoparticles Composite as Multifunctional Textile Materials

2014 ◽  
Vol 2014 ◽  
pp. 1-5
Author(s):  
Javed Sheikh ◽  
M. D. Teli
Keyword(s):  
Antibacterial Activity ◽  
Acrylic Acid ◽  
Zno Nanoparticles ◽  
Uv Protection ◽  
Textile Material ◽  
Gram Negative Bacteria ◽  
Gram Positive ◽  
Gram Negative ◽  
Textile Materials ◽  
Bamboo Rayon

In the current study, an acrylic acid grafted bamboo rayon fabric was utilized as a substrate to immobilize ZnO nanoparticles. The bamboo rayon-ZnO nanoparticles composite was prepared by the treatment of swollen grafted fabric with ZnCl2 followed by conversion of Zn2+ ions into ZnO nanoparticles. The modified product was characterized and then evaluated for antibacterial activity against gram-positive and gram-negative bacteria as well as durability of their antibacterial activity after washing. The product showed antibacterial activity against both types of bacteria which was found to be durable till 40 washes. The modified material also showed improved UV protection. The product can be claimed as semidurable multifunctional textile material.

In-vitro Antioxidant and Antibacterial Activity of Methanolic Extract of Shorea robusta Gaertn. F. Resin

2016 ◽  
Vol 6 (4) ◽  
pp. 68
Author(s):  
Sushma Vashisht ◽  
Manish Pal Singh ◽  
Viney Chawla
Keyword(s):  
Antibacterial Activity ◽  
Methanolic Extract ◽  
Diffusion Method ◽  
Gram Negative Bacteria ◽  
Disc Diffusion ◽  
Gram Positive ◽  
Gram Negative ◽  
Shorea Robusta ◽  
Dose Dependent ◽  
Resin Extract

The methanolic extract of the resin of Shorea robusta was subjected to investigate its antioxidant and antibacterial properties its utility in free radical mediated diseases including diabetic, cardiovascular, cancer etc. The methanol extract of the resin was tested for antioxidant activity using scavenging activity of DPPH (1,1-diphenyl-2-picrylhydrazil) radical method, reducing power by FeCl3 and antibacterial activity against gram positive and gram negative bacteria using disc diffusion method. The phytochemical screening considered the presence of triterpenoids, tannins and flavoniods. Overall, the plant extract is a source of natural antioxidants which might be helpful in preventing the progress of various oxidative stress mediated diseases including aging. The half inhibition concentration (IC50) of resin extract of Shorea robusta and ascorbic acid were 35.60 µg/ml and 31.91 µg/ml respectively. The resin extract exhibit a significant dose dependent inhibition of DPPH activity. Antibacterial activity was observed against gram positive and gram negative bacteria in dose dependent manner.Key Words: Shorea robusta, antioxidant, antibacterial, Disc-diffusion, DPPH.

Antibacterial activity of magnesium oxide nanoparticles prepared by Calcination method

2019 ◽  
Vol 10 (03) ◽  
Author(s):  
Elaf Ayad Kadhem ◽  
Miaad Hamzah Zghair ◽  
Sarah , Hussam H. Tizkam, Shoeb Alahmad Salih Mahdi ◽  
Hussam H. Tizkam ◽  
Shoeb Alahmad
Keyword(s):  
Antibacterial Activity ◽  
Magnesium Oxide ◽  
Diffusion Method ◽  
Oxide Nanoparticles ◽  
Gram Negative Bacteria ◽  
Gram Positive ◽  
Gram Negative ◽  
Gram Positive Bacteria ◽  
Magnesium Oxide Nanoparticles ◽  
Agar Disc

magnesium oxide nanoparticles (MgO NPs) were prepared by simple wet chemical method using different calcination temperatures. The prepared NPs were characterized by Electrostatic Discharge (ESD), Scanning Electron Microscope (SEM) and X-ray Diffraction (XRD). It demonstrates sharp intensive peak with the increase of crystallinty and increase of the size with varying morphologies with respect to increase of calcination temperature. Antibacterial studies were done on gram negative bacteria (E.coli) and gram positive bacteria (S.aureus) by agar disc diffusion method. The zones of inhibitions were found larger for gram positive bacteria than gram negative bacteria, this mean, antibacterial MgO NPs activity more active on gram positive bacteria than gram negative bacteria because of the structural differences. It was found that antibacterial activity of MgO NPs was found it has directly proportional with their concentration.

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