Volume-15 ~ Issue-7 ~ July 2022

Abstract: Ocimum species which belong to the family Lamiaceae have several medicinal uses including antimalarial, antimicrobial, antidiabetic, hepato-protective, anti-inflammatory, anti-carcinogenic, cardio-protective and insect repellent. Ocimum suave Willd is used in traditional medicine to treat ulcers, fever, stomach ache, and bronchopneumonic infections. However, information about bioactive principles from the plant is scanty. This study was conducted to determine the chemical composition of Ocimum suave. Hexane and ethyl acetate extracts from the plant were subjected to chromatographic fractionation using organic solvents. This led to isolation and identification of five compounds namely β-amyrin, betulinic acid, lupeol, β-sitosterol and stigmasterol. The structures of the........

Keywords: Ocimum suave; solvent extraction; 1H NMR; 13C NMR; Column chromatography

[1]. Jeruto P, Arama P, Anyango B, Nyunja R, Taracha C, Opiyo S. Morphometric Study of Senna didymobotrya (Fresen.) H. S. Irwin and Barneby in Kenya. J Nat Sci Res www.iiste.org ISSN. 2017;7(6):54-69. www.iiste.org.
[2]. Zhang Q. Global situation and WHO strategy on traditional medicine. Tradit Med Mod Med. 2018;01(01):11-13. doi:10.1142/s257590001820001x.
[3]. Abdullahi AA. Trends and challenges of traditional medicine in Africa. African J Tradit Complement Altern Med. 2011;8(5):115-123. doi:10.4314/ajtcam.v8i5S.5.
[4]. Manguro LOA, Opiyo SA, Herdtweck E, Lemmen P. Triterpenes of Commiphora holtziana oleo-gum resin. Can J Chem. 2009;87(8):1173-1179. doi:10.1139/V09-078.
[5]. Opiyo SA. A review of 13C NMR spectra of drimane sesquiterpenes. Trends Phytochem Res. 2019;3(3):147-180.

Abstract: The presence of heavy metals in water has been an increasing source of concern on a global scale. Hence the need for safe and economical methods for the elimination of heavy metals from contaminated waters has necessitated a worldwide research interest. This study investigates the efficacy of the removal of toxic heavy metal ions, chromium (Cr3+), and copper (Cu2+) by adsorption to a Schiff base of salicylaldehyde and aniline. The adsorption process was studied with respect to contact time and Infra-red (IR) spectral analysis was carried out before and after extraction to indicate possible adsorption of metal ions to the Schiff base. The result showed that adsorption was reached within 10 and 15 minutes respectively. 72.5 percent of chromium was observed to be the maximum removal percentage while 99 percent of copper was also observed to be the maximum removal percentage. Therefore, it is deduced that the Schiff base of salicylaldehyde and aniline removes copper more efficiently than chromium with a shorter time duration.

Keywords: Heavy metals, Wastewater, Adsorption, Schiff base

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[4]. L. Zhou, Y. Wang, Z. Liu, and Q. Huang, "Characteristics of equilibrium, kinetics studies for adsorption of Hg(II), Cu(II), and Ni(II) ions by thiourea-modified magnetic chitosan microspheres," Journal of Hazardous Materials, vol. 161, no. 2-3, pp. 995– 1002, 2009.
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Abstract: Medicinal plants are playing vital role in the protection of the people from major ailments such cancer, Hepatitis, CNS disorders etc. Previous study reported thatcancer cells were induced by free radicals and were controlled by more number of mechanisms involved in medicinal chemistry. Among these (SHT) single proton transfer mode / single electron transfer modes (SET) are the important mechanisms to control the free radicals. These modes were involved in the determination of antioxidant ability of phyto compounds. By the release of H / e- while the scavenging activity of phytocompounds through SHT and SET modes, the free radicals were controlled from further chain reactions.The controlling ability determined the antioxidant potential of phytochemical compounds.....

Key words Copper II Neocuproine, Medicinal plants, phyto compounds, Electro chemical workstation, anti-oxidant potential.

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Abstract: The aim of this research is to synthesize and characterize iron pigments locally sourced from enugu magnetite for coating applications. Iron pigment was extacted with appropriate techniques and filtered using permanent magnets. The filtered pigment was characterized using X-ray diffraction (XRD) and X-ray Fluorescence (XRF) to determine the compounds contained therein and their various characteristics. The filtered pigment was heated at temperatures of 800°C and 900°C for 5 hours in the furnace. It was allowed to cool before XRD and XRF characterization. Based on the x-ray diffraction analysis, a single phase Fe3O4 was formed after a 900 ° C heating process for 2 hours. The extracted pigments was utilized in paint production and yield a positive results which concludes that the extracted iron pigment can be successfully used for coating applications.

Keywords: Iron pigment, Characterization, Coating

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Abstract: This paper presents the feasibility of removal of Ni (II) from aqueous solutions by using a low-cost BC-TiO2-SAP-NC. Batch adsorption experiments were carried out as a function of pH, contact time, initial concentration of the adsorbate, adsorbent dosage and temperature. Adsorbent used in this study are characterized by FT-IR, XRD and SEM analysis.

Keywords: Ni (II), BC-TiO2-SAP-NC, Batch adsorption studies.

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Abstract: Service life is the ability of intumescent coating to maintain an appropriate level of fire-retardant efficiency under the influence of environmental conditions, during both construction and further intended use. It is crucial to be able to estimate this parameter with a decent level of accuracy, as premature leaching of components or chemical aging of the coating can partially or completely eliminate its fire-retardant properties, while fire safety requirements for building structures must be met throughout the duration of the life of a building, which according to manufacturers' claims is at least 20–25 years. The main factors, that can reduce.......

Key Word: Service life; Intumescent; Polymer binder; Accelerated aging; Water resistance

[1]. De Silva D, Nuzzo I, Nigro E, Occhiuzzi A. Intumescent coatings for fire resistance of steel structures: current approaches for qualification and design. Coatings. 2022;12(5):696–713.
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[3]. Dreyer JAH, Weinell CE, Dam-Johansen K, and Kiil S. Review of heat exposure equipment and in-situ characterisation techniques for intumescent coatings. Fire Safety Journal. 2021;121,103264.
[4]. Yasir M, Ahmad F, Yusoff PSMM, Ullah S, Jimenez M. Latest trends for structural steel protection byusing intumescent fire protective coatings: a review. Surface Engineering. 2019;36(4):334–363.
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Abstract: Syntheses of unsymmetrical dicoumarol were carried out by reacting one equivalent of 4-hydroxycoumarin (5ac) and one equivalent of an appropriate aromatic anhydride in ethanol solvent at a temperature of 80 oC for 45 minutes. The products (1a-f) were isolated as yellow compounds with poor yields (28 - 30%) due to competitive dimer formation (1g). Their after, six equivalents of Hanzsch's ester (6a) were added to a solution of the unsymmetrical dicoumarol (1a-f) in methanol solvent. In order to achieve complete conversion, the reaction were left to stir overnight and this gave compound (2a- f) in a poor to moderate yields (20- 74%).The identities of the compounds were confirmed using NMR, IR and mass spectrometry. Compounds (2a- f) were assayed in the absence of BSA and their IC50 values show moderate inhibitory potency towards NQO1 enzyme.

Key words: synthesis, unsymmetrical dicoumarol, Hanzsch's ester, enzyme assay, NQO1

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Abstract: Background: Coconut oil (Cocosnucifera L.) has required analytical methods capable of evaluating processing and storage conditions. Foods containing oils and fats deteriorate during storage in an oxygen atmosphere due to auto-oxidation. But when they are heated to high temperatures, the oxidation process is accelerated, with oxypolymerization and thermal oxidative decomposition reactions taking place. Materials and MethodsIn this work, the thermal and oxidative stability properties of the extra virgin coconut oil produced by the Brazilian industry and the coconut oil obtained in a handmade way were compared. Results: The results confirm the high content of saturated fatty acids in coconut oil, mainly due to the high content of lauric acid, responsible for increasing the oxidation stability, besides changing the oil melting profile, contributing to the increase of the use of the fat of this oil in specific products. Extra virgin oil has greater thermal stability compared to handcraft oil......

Key Word: Coconut oi; Handcraft production; chemical composition; food..

[1]. Santos, JCO,Trindade, MFS, Santos, IMG, Souza, AG.Thermoanalytical, kinetic and rheological parameters of commercial edible vegetable oils. J. Therm. Anal. Calorim. 2004; 75 (2): 345-350.
[2]. Santos, JCO, Dantas, JP, Medeiros, CA, Athaíde-Filho, PF, Conceição, MM, Souza, AG. Thermal Analysis in Sustainable Development: Thermoanalytical study of faveleira seeds (CnidoscolusQuercifolius). J. Therm. Anal. Calorim. 2005; 79 (5): 271–275.
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[4]. Santos, JCO, Souza, AG,Prasad, S. Influence of Artificial Antioxidants on Thermal and Oxidative Stability of the Rice Bran Oils Using Thermogravimetry and Differential Scanning Calorimetry. Chem. Tech. - an Ind. J. 2006; 1 (1): 2-12.
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Abstract: A novel set of tetrasubstituted imidazole derivatives were crafted through a multicomponent one-pot synthesis scheme. This procedure incorporated a cyclocondensation reaction involving benzil, aromatic primary amines, aldehydes, and ammonium acetate within glacial acetic acid. To characterize the resultant compounds, various methods were employed including determination of melting point, color assessment, conductivity evaluation, CHN analysis, along with FT-IR and UV-Visible spectroscopy. The progression of the reaction was monitored using Thin Layer Chromatography (TLC) at regular time intervals. To assess the biological efficacy of these compounds, they were tested against multiple bacterial strains. All three imidazole derivatives exhibited varying degrees of notable antibacterial activity against the tested bacterial strains.

Key Word: Imidazole Compound, Benzil Derivative, Formation Process, Analysis and Identification

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