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8 articles for “dichloromethane”
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Synthesis, Crystal Structure and Reactivity Study of N-Pyrrolyl-P, P-Diphenylphosphino Sulfide/Selenide Ligand
Abstract: 800x600 We report the synthesis and solid state structures of the N-pyrrolyl-P,P-diphenylphosphino sulfide and selenide of molecular formulae [C4H4NP(S)Ph2] (1) and [C4H4NP(Se)Ph2] (2) respectively. Compounds 1 and 2 were prepared by one pot reaction of pyrrole and [Ph2P(E)Cl] (E = S and Se) in the presence of NaH as base at ambient temperature. In the solid state structure established by single crystal X-ray diffraction analysis, phosphorus atom adopts a distorted …
Published in Journal of Modern Chemistry & Chemical Technology · Vol. 5, Issue 3, 2014 · pp. 35–45 Read article
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Preliminary Phytochemical and Acute Toxicity Studies of Different Extracts of Guiera Senegalensis
Abstract: The leaf of Guiera senegalensis is used in the management of many diseases in Nigeria and many African countries, but the medial lethal doses (LD50) of its different extracts are not widely investigated. To evaluate the phytochemical constituents and acute toxicity indexes of aqueous, hexane, dichloromethane and methanol leaf extracts of G. senegalensis, basic phytochemical screening methods were applied. While up and down procedure and Lorke’s method was used for …
Published in Research & Reviews: A Journal of Pharmacognosy · Vol. 6, Issue 3, 2019 · pp. 11–16 Read article
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Modelling and Evaluation of Kinetics of Methane Chlorination using Matlab Techniques
Abstract: The chlorination of methane follows series-consecutive reaction mechanism to yield the chloromethanes products. The equation of reaction comprised of four consecutive step chemical reaction equations. The kinetics model for chlorination of methane into monochloromethane, dichloromethane, trichloromethane and tetrachloromethane was developed from the chemical reaction equations. In the elementary rate equation, the concentration of chlorine was assumed to be in excess, reducing the model to first order kinetics. The developed model …
Published in Journal of Catalyst & Catalysis · Vol. 7, Issue 2, 2020 · pp. 31–36 Read article
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Polymer Chemistry in Sustained-Release Herbal Composites: Designing a Stable Euphorbia tithymaloides Topical System with Phospholipid and Polymer Matrices
Abstract: Polymer chemistry enables the stabilization and sustained release of herbal actives, critical for topical therapeutic applications. This study explores a novel process for preparing a stable, sustained-release topical composition of Euphorbia tithymaloides, leveraging polymer-based systems. Ethanolic extract (50 mg) of the plant, rich in unstable sugar moieties (e.g., D-ribose) and sterols (e.g., stigmasterol), is encapsulated within a phospholipid matrix of phosphatidylcholine (50–100 mg) and cholesterol (50–100 mg). This lipid-polymer complex, …
Published in Journal of Polymer & Composites · Vol. 13, Issue 6, 2025 · pp. 165–171 Read article
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DFT/Data Guided Predictive Modelling of Absorption Maxima in the OLED Rubrene Derivatives
Abstract: This study investigates the optical properties of rubrene derivatives to develop an accurate predictive model for absorption maxima using computational chemistry and chemoinformatic techniques. We benchmarked various quantum chemical methods, identifying that the M06-2X/aug-cc-pVDZ method in dichloromethane (DCM) provided the strongest correlation with experimental data. Key molecular descriptors such as band gap, ionization potential, and electrophilicity index were calculated and analyzed using principal component analysis (PCA) to identify significant factors …
Published in International Journal of Cheminformatics · Vol. 4, Issue 1, 2026 · pp. 41–56 Read article
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Toxicity Evaluation of a Few PAHs on a Local Freshwater Fish—Rasbora daniconius
Abstract: Polycyclic Aromatic Hydrocarbons (PAHs) have become ubiquitous pollutants of water resulting mainly from petroleum products. These are absorbed into the living systems and converted into secondary metabolites which show bioaccumulation in the living systems and have several deleterious effects on them. The present study attempts to evaluate toxicity of two such PAHs— Naphthalene and Anthracene—on the freshwater fish, Rasbora daniconius, using pure PAHs dissolved in dichloromethane. LC50 values were seen …
Published in Research and Reviews: A Journal of Toxicology · Vol. 10, Issue 1, 2020 · pp. 42–46 Read article
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Phytochemical Evaluation in Various Leaf Extracts of Wild Bhendi
Abstract: The vast diversity of natural products have been used for combating human diseases for thousands of years, since they exhibit a wide range of biological properties that can be exploited for medical application. The present study was carried out to analyse the preliminary phytochemical constituents in various solvent extract of wild Bhendi. The results revealed the presence of medicinally active compounds such as alkaloids, tannin, phenol, saponin, flavonoids and glycosides …
Published in Research and Reviews : A Journal of Life Sciences · Vol. 11, Issue 3, 2021 · pp. 23–28 Read article
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Antibacterial Activities of Crude Extract from Infected Cocoa Against Abscess Forming Bacteria
Abstract: In this study, the antibacterial activity of crude phytoalexin extracted from matured cocoa pod against abscess forming bacteria was investigated. The crude phytolexin was extracted using redistilled dichloromethane after five days of post infection. Different concentrations (50, 100, 150 and 200 mg/ml) of the extract were tested against abscess forming bacteria namely; Escherichia coli, Staphylococcus aureus, Klebsiella Pneumoniae, Pseudomonas aeruginosa and Enterococcus faecium using paper disc and agar diffusion methods. …
Published in Research & Reviews: A Journal of Pharmacognosy · Vol. 2, Issue 3, 2015 · pp. 21–27 Read article