NOPR Collection:

Synergistic interactions in W/O microemulsions containing imidazolium based C₁₂mimBr and sodium lauryl sulfate

2016-04-01T00:00:00Z

Title: Synergistic interactions in W/O microemulsions containing imidazolium based C₁₂mimBr and sodium lauryl sulfate Authors: Chai, J L; Zhang, Y; Liu, N; Hou, N; Song, J W; Zhang, J Q; Lu, J J Abstract: The physicochemical properties and synergistic effects of W/O microemulsion systems containing imidazolium based surfactant, 1-dodecyl-3-methylimidazolium bromide (C₁₂mimBr)-sodium lauryl sulfate (SLS)/ alcohol/alkane/5% NaCl solution at different molar ratios of water-to-surfactant (ω₀) are studied. The W/O microemulsions are formed at the molar fractions of SLS-to-C₁₂mimBr+SLS (X_SLS) ranges of 0.0-0.3 and 0.7-1.0. The synergism between C₁₂mimBr and SLS can be seen from the values of X(mole fraction of alcohol in the oil phase), X(mole fraction of alcohol in the interfacial layer) and -G_→i (the standard free energy change of transferring alcohol from the continuous oil phase to the interfacial layer). The increase in the values of X and X, and the decrease in -G_→i values with ω₀ is attributed to the increasing hydrophilicity of the microemulsions. By increasing the carbon chain lengths of the alcohol molecules, or by increasing the salt concentrations, the values of X and X decrease, whereas that of -G_→i increases for the W/O microemulsions containing the mixed surfactants. On the other hand, the effect of the alkane carbon chain lengths is exactly the effect of the alcohol carbon chain lengths on the these parameters. Page(s): 447-451

In situ formation of silver nanoparticles in thermosensitive glycogels and evaluation of its antibacterial activity

2016-04-01T00:00:00Z

Title: In situ formation of silver nanoparticles in thermosensitive glycogels and evaluation of its antibacterial activity Authors: Kulkarni, Anuja S; Dhanwe, Vaishali P; Dhumure, Archana B; Khan, Ayesha; Shinde, Vaishali S; Khanna, Pawan Kumar Abstract: Copolymeric thermosensitive hydrogel, N-isopropylacrylamide and glycomonomer based on D-galactose have been synthesized by free radical polymerization using 2,2′-azobis-isobutyronitrile as initiator and ethylene glycol dimethacrylate as crosslinker. This hydrogel has been further used as template to synthesize AgNPs. The composite glycogel containing AgNPs has been characterized by different techniques and tested for antibacterial activity against E. coli and P. aeruginosa. Page(s): 441-446

Host-guest complexation between 3-hydroxyflavone and β-cyclodextrin: Preparation, characterization and cytotoxicity studies

2016-04-01T00:00:00Z

Title: Host-guest complexation between 3-hydroxyflavone and β-cyclodextrin: Preparation, characterization and cytotoxicity studies Authors: Praveena, Arumugam; Swaminathan, Meenakshisundarm; Prabu, Samikannu; Rajamohan, Rajaram Abstract: The inclusion complex of HF with β-CD has been prepared by various synthetic method such as physical method (PM), kneading method (KM) and co-precipitation method (CP) and characterized by UV, luminescence spectra, Fourier transform infrared spectroscopy, scanning electron microscopy and powder X-ray diffraction. Investigations into the anticancer activity of the solid complex against breast cancer cell line show that it is not much better than that of the HF alone. Both the HF and its solid complex show the poor anticancer activity against MDA MB 231 cell line. Page(s): 435-440

Synthesis and characterization of titania-magnetic activated carbon composite for photocatalytic degradation and mineralization of p-nitrophenol

2016-04-01T00:00:00Z

Title: Synthesis and characterization of titania-magnetic activated carbon composite for photocatalytic degradation and mineralization of p-nitrophenol Authors: Shintre, Surabhi N; Thakur, Pragati Abstract: A novel, magnetically separable composite photocatalyst, titania coated with magnetic activated carbon, is prepared by depositing TiO₂ onto the surface of magnetic activated carbon which was prepared by directly adsorbing of magnetic Fe₂O₃ nanoparticles onto activated carbon. The samples are characterized by X-ray diffraction, scanning electron microscopy and vibration sample magnetometer. Specific surface area is determined by BET method and is found to be 381 m²/g. The photocatalytic activity of the composite is determined by degradation of the model contaminant of water, i.e., p-nitrophenol. The degradation rate of p-nitrophenol by composite was higher than 90% after the composite was reused for five cycles. The synergy factor for the degradation of p-nitrophenol by titania coated with magnetic activated carbon was found to be 1.45. The composite can be easily separated by a magnet. Page(s): 429-434

NOPR Collection:

Synergistic interactions in W/O microemulsions containing imidazolium based C12mimBr and sodium lauryl sulfate

In situ formation of silver nanoparticles in thermosensitive glycogels and evaluation of its antibacterial activity

Host-guest complexation between 3-hydroxyflavone and β-cyclodextrin: Preparation, characterization and cytotoxicity studies

Synthesis and characterization of titania-magnetic activated carbon composite for photocatalytic degradation and mineralization of p-nitrophenol

Synergistic interactions in W/O microemulsions containing imidazolium based C₁₂mimBr and sodium lauryl sulfate