Bare magnetic nanoparticles: sustainable synthesis and applications in catalytic organic transformations

Mini-review: Ferrite nanoparticles in the catalysis

Review on nanomaterials: Synthesis and applications

Magnetic nanoparticles have emerged recently as an alternative for the easy separation of nanosized catalysts from reaction mixtures by employing an external magnetic field. These magnetic nanoparticles have been used as supports for catalysts and/or as part of an active catalytic site. Herein, special attention is given to identify the main synthetic steps required to develop both precious‐ and nonprecious‐metal‐catalyzed CC and CX coupling reactions by using magnetically separable catalysts.

Recent Applications of Magnetically Recoverable Nanocatalysts in CC and CX Coupling Reactions

The survival rate, p , of a measured inoculum of Staph. aureus in a standard volume of denbrinated blood, is a reliable quantitative measure of the bactericidal power of blood. The number of viable organisms in the inoculum and in the blood-bacterium mixture may be estimated with the necessary accuracy by counts of colonies developing from measured volumes of the fluids let fall on to the surface of solid media. Fildes' agar was the most suitable medium for this surface-viable count, and was selected on the basis of four criteria; of the media tested it yielded the highest counts, and the counts conformed most closely to a Poisson series; and on it the mean colony size was maximum, and the coefficient of variation of colony size was minimum. On this medium, the close conformity of the separate count values to a Poisson series enabled the standard error of the survival rate to be determined from a simplification of the general expression for the standard error of a ratio. The number of colonies growing from a sample of a blood-bacterium mixture may be reduced, not by killing of the individual cocci, but as a result of their aggregation either by agglutinins in the blood, or in the cytoplasm of leucocytes that are phagocytic but not bactericidal. It appears that these mechanisms are unlikely to operate in blood-bacterium mixture containing relatively few organisms; in such mixtures the survival rate is a reflexion of the killing power only. The immunological significance of p has not been investigated, but the range of values for healthy human adults differs significantly from that for sufferers from chronic staphylococcal infection. Moreover, by the technique employed differences may be detected between individual values of p that cannot reasonably be attributed to technical or sampling errors.

The Estimation of the Bactericidal Power of the Blood. With a Note by J. O. IRWIN.

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A Facile Synthesis of Amide Derivatives of [1,2,4]Triazolo[4,3-a]pyridine

Design, molecular docking studies of oxaprozin linked to 4-thiazolidinone derivatives as a potent anticancer, analgesic and antiinflammatory agents

The exocyclic C=C double bond in phenacylideneoxindole and 2-oxoacenaphthen-1-ylidene ketone derivatives has been selectively reduced in good yields with a combination of the Hantzsch ester and zinc chloride in acetonitrile at ambient temperature.

Facile Chemoselective Reduction of 3-Phenacylideneoxindoles and 2-Oxoacenaphthen-1-ylidene Ketones using the Hantzsch Ester

The main objective of this study was to develop a simple, efficient, specific, precise and accurate newly improved modified Reverse Phase High Performance Liquid Chromatographic Purity (or) Related substance method for bromofenac sodium sesquihydrate active pharmaceuticals ingredient dosage form. Validation of analytical method is the confirmation by examination and the provision of objective evidence that the particular requirements for a specific intended use are fulfilled as per ICH, USP, BP or any other suitable regulatory guidelines. The Reverse Phase High Performance Liquid Chromatographic Gradient method was developed by utilizing Waters Symmetry C8, 150x4.6mm, 3.5 μm on Waters 2487 series Liquid Chromatograph. The retention time of bromofenac sodium sesquihydrate was found to be 5.973 minutes. Considering all the results of validation parameters simplicity of the method and the cost effectiveness of the overall procedure, it is possible to conclude that the developed method can be suitable for the regular quality control determination of bromofenac sodium sesquihydrate in bulk as well as pharmaceutical dosage form. The developed Reverse Phase High Performance Liquid Chromatographic Purity (or) Related substance method for bromofenac sodium sesquihydrate active pharmaceuticals ingredient method was validated with respect to System Suitability , linearity, precision, Range, Ruggedness, Test Solution and Mobile phase stability ,Robustness.

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A Newly Improved Modified Method Development and Validation of Bromofenac Sodium Sesquihydrate in Bulk Drug Manufacturing

Multiferroic materials are novel multifunctional materials which possess both ferroelectric and magnetic properties. These materials have a variety of applications from semiconductors to sensors. A novel nanocomposite is made of equimolar perovskite-rhombohedral bismuth ferrite-silver ferrite composite through chemical route by blending of nano-bismuth ferrite as the second phase in nanosilver ferrite and left for soaking for 1 and 4 h and then heated at 500 °C. The phases and planes are analyzed and the particle sizes are calculated by X-ray diffraction method and SEM studies indicate features of interconnected agglomeration with spherical in rhombohedral synthesized nanocomposite. The transmission electron microscopy images also correlate the experimental observations from XRD analysis and the band gap is calculated by UV-visible spectra. From Tauc relation, the band gaps are found as 2.84, 2.65 eV, respectively, for 1 and 4 h soaking periods. These values are close to the semiconducting material. It also indicates the increase of soaking time, the band gap is found to be decreased. The VSM analysis of the synthesized nanocomposite at 500 °C for 4 h is determined. M-H curve indicates nanocomposite closer to superparamagnetic nature. These properties are interesting characteristics suitable for photo, magnetic, optoelectronic and other electronic applications.

I. V. Kasi Viswanath

Papers

A Facile Synthesis of Amide Derivatives of [1,2,4]Triazolo[4,3-a]pyridine

Design, molecular docking studies of oxaprozin linked to 4-thiazolidinone derivatives as a potent anticancer, analgesic and antiinflammatory agents

Facile Chemoselective Reduction of 3-Phenacylideneoxindoles and 2-Oxoacenaphthen-1-ylidene Ketones using the Hantzsch Ester

A Newly Improved Modified Method Development and Validation of Bromofenac Sodium Sesquihydrate in Bulk Drug Manufacturing

Study of Bismuth Ferrite-Silver Ferrite Nanocomposite About Structure, Characterization, Magnetic Properties and Band Gap Evaluation