2-Substituted 1,3-Thiazolidine-4-Carboxylic Acids (1-11) were synthesized and screened for their anti-methicillin-resistant Staphylococcus aureus (MRSA) potential. The synthesized compounds were evaluated for their antibacterial activities against four MRSA strains MRSA I, VI, VII and VIII with accession numbers KU662352, KR862285, KR862291 and KU662354 respectively by well diffusion method. In addition, antibacterial evaluations were also performed for gram positive strain Bacillus subtilis and gram-negative strains klebsiella pneumoniae and pseudomonas aeruginosa using same method. Most of the synthesized thiazolidine-4-carboxylic acid derivatives exhibited better antibacterial activities against studied bacterial strains. Amongst the synthesized compounds, 8-10 were found to possess significant activity (Zone in mm) against methicillin-resistant Staphylococcus aureus in addition to the other studied bacterial strains.
The aim of this study was to prepare poly-N-isopropylmethacrylamide-co-acrylic acid-acrylamide [p-(NIPMAM-co-AA-AAm)] via precipitation polymerization in an aqueous medium. Rhodium nanoparticles were formed in the microgel network by an in-situ reduction technique with the addition of sodium borohydride as a reducing agent. Pure p-(NIPMAM-co-AA-AAm) and hybrid microgels [Rh-(p-NIPMAM-co-AA-AAm)] microgels were examined by using UV–Visible, FTIR (Fourier Transform Infrared), SEM (Scanning Electron Microscopy), TEM (Transmission Electron Microscopy), DLS (Dynamic Light Scattering) and XRD (X-Ray Diffraction) techniques. The catalytic activities of the hybrid microgel [Rh-(p-NIPMAM-co-AA-AAm)] for the degradation of azo dyes such as alizarin yellow (AY), congo red (CR), and methyl orange (MO) were compared and the mechanism of the catalytic action by this system was examined. Various parameters including the catalyst amount and dye concentration influenced the catalytic decomposition of azo dyes. In order to maximize the reaction conditions for the dye's quick and efficient decomposition, the reaction process was monitored by spectroscopic analysis. The rate constants for reductive degradation of azo dyes were measured under various conditions. When kapp values were compared for dyes, it was found that [Rh-(p-NIPMAM-co-AA-AAm)] hybrid microgels showed superior activity for the degradation of MO dyes compared to the reductive degradation of CR and AY.
Stimuli responsive polymer microgels have gained attention due to their envisioned applications.The aim of this study is to organize Au-based poly(N-isopropylmethacrylamide-co-acrylamide) [Au-p-(NIPMAM-co-AAm)] microgels and to analyse their degradation potential.Microgels were analyzed via UV-Visible (ultraviolet-visible) spectroscopy, X-ray diffraction and Fourier-transform infrared spectroscopy.Reductive degradation of Congo red (CR) was done to evaluate the catalytic activity of Au-based p-(NIPMAM-co-AAm) microgels that converts CR into less toxic products, that is, sodium 4-amino-1-naphthalene sulfate and biphenyl.Kinetic study of reaction reveals first order reaction and by altering the concentration of Congo red (CR) dye from 0.02 to 0.095 mM, the change in apparent rate constant (k app ) was noted from 0.0027 to 0.1235 min -1 .Whereas the change in value of rate constant (k app ) was observed from 0.0716 to 0.2931 min -1 as catalytic dose was changed from 0.06 to 0.1 mL (60-100 µL) at certain temperature.Reduction efficiency of recycled Au-based p-(NIPMAM-co-AAm) was also deliberated and not any remarkable reduction was observed in the percentage catalytic efficiency of nanocomposite until four cycles.
Extensive research suggests that a number of plant-derived chemicals and traditional Oriental herbal remedies possess cognition-enhancing properties. Widely used current treatments for dementia include extracts of Ginkgo biloba and several alkaloidal, and therefore toxic, plant-derived cholinergic agents. Several non-toxic, European herbal species have pan-cultural traditions as treatments for cognitive deficits, including those associated with aging. Acute administration has also been found to reliably improve mnemonic performance in healthy young and elderly cohorts, whilst a chronic regime has been shown to attenuate cognitive declines in sufferers from Alzheimer's disease. The present chapter looks at the ethnobotanical and pharmacological importance of various plants cognitive enhancing and other neuroprotective abilities.
Arsenic, an element found in the Earth's mantle, can be highly toxic, especially in its As (III) form.It enters our food chain through human activities like melting metals, using arsenic-based pesticides, and natural processes like volcanoes and rock breakdown.Consuming too much arsenic is extremely dangerous, impacting many countries worldwide.To tackle this issue, various methods like filtering, adding chemicals, and using electricity have been developed to clean arsenic-contaminated water.Among these, adsorption is a standout approach due to its simplicity and effectiveness.Biopolymers from living sources offer a natural solution, easily tweaked for arsenic removal.These biopolymers contain functionalities that can strongly latch onto toxic materials, acting like magnets.By customizing them with compounds like titanium dioxide (TiO 2 ), magnetite (Fe 3 O 4 ), and others, they become even better at capturing arsenic, shaped into tiny particles or beads.This adaptation makes biopolymers a promising choice for cleaning arsenic from water.This review focuses on ways to clean water, specifically exploring how materials like chitosan, alginate, and modified cellulose can be used to remove arsenic by adsorption.It investigates how these materials work under different conditions, highlighting important details.By sharing these insights, this article contributes to the ongoing efforts to ensure cleaner water resources.
Polymer nanocomposites have been discovered in the last three decades. Recently, polymer nanocomposites have been making a large impact in the media and throughout several industries. Therefore, a systematic review on the classification, synthesis, and applications of polymer nanocomposites is extremely important. This review paper critically focuses on the three fundamental aspects, classification, properties, and applications to gain profound insights into polymer nanocomposites. It includes in-depth studies of the classification of polymer nanocomposites based on size, dimensions, and kinds of nanofillers. Various techniques are used to prepare polymer nanocomposites. This review also provides valuable applications in various engineering and medical fields.
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