Recent advances in biodiesel production using functional carbon materials as acid/base catalysts

Graphene-based catalysts for biodiesel production: Characteristics and performance.

In the present work, a novel symmetrical 15-membered macrocyclic Schiff base complex of manganese was prepared using the reaction of the synthetic 2,6-diacetylpyridine functionalized Fe3O4 MNPs with 2,2-(piperazine-1,4-diyl)dianiline and Mn(ii) bromide salt via a template approach. The resulting [Fe3O4@PAM–Schiff-base–Mn][ClO4] heterogenized complex was characterized using FT-IR, XRD, BET, TGA, EDX, Xray-mapping, SEM, TEM and VSM analysis. To demonstrate proof of concept, Huisgen 1,3-dipolar cycloaddition synthesis of 1,2,3-triazoles was selected to evaluate the activity and reusability of the catalyst. The ethanol as a green solvent proved to be an excellent reaction medium for this synthesis. Yields of up to 100% were obtained in some cases. Significantly, as demonstrated, [Fe3O4@PAM–Schiff-base–Mn][ClO4] catalyst was recycled for 8 cycles without losing catalytic activity under the optimized reaction conditions. The hot filtration and ICP-OES tests ratified that there was no leaching of metal during the catalytic reaction, indicating the heterogeneous manner of the catalyst.

Nanomagnetic macrocyclic Schiff-base–Mn(ii) complex: an efficient heterogeneous catalyst for click approach synthesis of novel β-substitued-1,2,3-triazoles

Advances in production & activation of marine macroalgae-derived biochar catalyst for sustainable biodiesel production

Boosted biodiesel production from waste cooking oil using novel SrO/MgFe2O4 magnetic nanocatalyst at low temperature: Optimization process

Recent advances in heterogeneous catalysis for green biodiesel production by transesterification

Bio-accessibility and health risk assessment of some selected heavy metals in indoor dust from higher institutions in Ondo State, Nigeria

The use of a controlled-release drug carrier is an innovative solution for the treatment of local infections, in particular in dentistry, skin diseases, and in open wounds. The biocompatibility, biodegradability, the possibility of a large amount of drug adsorbed (especially those with hydrophilic properties), and the ability to create structures of any shape and size are the reasons for hydrogels to be frequently studied. The main disadvantage of hydrogel carriers is the rapid rate of drug release; hence, in this study, an attempt was made to additionally chemically cross-link 1-ethyl-3-(3-dimethyl aminopropyl)-1-carbodiimide hydrochloride (EDC) with the hyaluronic acid–alginate (HA–SAL) structure. The answer to significantly reduce the mass flux typical for hydrogel structure was to surround it with a polymer layer using a dry cover. By coating the carriers with polylactide, the release time was increased by around forty times. As the carriers were designed to reduce local bacterial infections, among others in dentistry, the released antibiotics were amoxycillin, metronidazole, and doxycycline.

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Hyaluronic Acid–Alginate Homogeneous Structures with Polylactide Coating Applied in Controlled Antibiotic Release


 Essential oils are important source of rich medicinal compounds. They are highly volatile, aromatic compounds from natural origins. The essential oils cause the hydrophobility of the bacteria cytoplasm, resulting to the cell wall degradation. The recent activity studies of Lantana camara have mapped out the need to investigate the antibacterial potency of its essential oil. Herein, the result and discussion of the characterization with their antibacterial activity of Lantana camara was reported; the Minimum inhibitory concentration (MIC) on the bacteria (Positive and Negative Gram) with Ciprofloxacin a known antibiotic as the positive control. The broth and agar diffusion method were used in estimating Zone of the inhibition. Oil show moderate antibacterial potency with respect to each of the bacterium used; the potency tends to increase considerably with increase in concentration (25% <50% < 80% < 100%). The zone of inhibition exhibited by the assay at 100% concentration of the essential oil on E. coli was the closest shown to that of the control (ciprofloxacin), also the MIC on E. coli at 100% concentration of the essential oil was greater than that of the control (ciprofloxacin). Consequently, essential oils from lantana camara becomes a wellspring of antibiotics for restraining bacteria action.

/pdf/antibacterial-activity-studies-of-essential-oils-from-red-r739nfyf.pdf

Omoyemi Oluwatosin Ajayi

Papers

Recent advances in heterogeneous catalysis for green biodiesel production by transesterification

Bio-accessibility and health risk assessment of some selected heavy metals in indoor dust from higher institutions in Ondo State, Nigeria

Hyaluronic Acid–Alginate Homogeneous Structures with Polylactide Coating Applied in Controlled Antibiotic Release

Antibacterial Activity Studies of Essential Oils from Red Sage (Lantana Camara)