Asian Journal of Applied Chemistry Research

In this primary research, 1-ethyl-3-methylimidazolium trifluoromethanesulfonate ionic liquid ([C₂mim][OTf]) was added to the high-density polyethylene/kenaf core fiber (HDPE/KCF) biocomposites by using an internal mixer at 150°C, followed by compression molding at the same temperature. The [C₂mim][OTf] contents were varied from 0 to 10wt.%. The tensile properties of the prepared biocomposites have been determined by using a universal testing machine. The tensile results of the HDPE/KCF biocomposites indicated that the tensile strength and tensile modulus have decreased with the addition of [C₂mim][OTf]. However, the presence of [C₂mim][OTf] has significantly increased the tensile extension at break of the biocomposites. This research concluded that the addition of [C₂mim][OTf] at the lower content (≈ 10wt.%) could act as a plasticizer for improving the flexibility of HDPE/KCF biocomposites.

The use of Fourier Transforms Infrared Spectroscopy (FTIR) in screening secondary metabolites provides valuable information on qualitative, quantitative and the pattern of the biologically active compounds. The present study was carried out to identify functional groups present in water, methanol and n-hexane extracts of Allium sativum and Nymphaea lotus. It was revealed that Allium sativum and Nymphaea lotus possess numerous secondary metabolites {A. sativum L. (isothiocynate, acid halide, conjugated aldehyde, imine/oxime, halo compound, conjugated amine, alphaticprimary amine, aldehyde, anhydride, α,β-unsaturated ketone, carboxylic acid, nitro compound, aromatic ester) and N. lotus L. (aliphatic primary amine, halo compound, anhydride, vinyl ether, cabocylic acid, cyclic alkene, unsaturated ketone, aldehyde, aliphatic primary amine, aldehyde, alkane, benzene derivative, sulphide, alkene, akyl aryl ether, sulfonyl chloride, δ-lactone, imine/oxime, thiocyanate, amine salt, esters, alkene, nitro compound, sulphate, sulphone, akyl aryl ether, aromatic ester, fluoro compound, amine salt, sulphonyl chloride, tertiary alchohol, α,β-unsaturated ketone, alkyne, allene, sulfonic acid, α,β-unsaturated ester, alphatic primary amine, amine, sulfonyl chloride, vinyl ether, aromatic amine, alphatic ketone, isothiocyanate, thiocynate, conjugated alkene and anhydride)} that may be biologically active which could be useful in production of antimicrobials and other medicinal products that can be of high benefits in proffering reliable alternative medicine to human and animal diseases.

The contaminations and exposures of some metals recognized as a risk to human health owing to consumption of components through water and atmosphere. Nine composite samples consist of five completely different waters and four soils were collected from the various places of Gopalgonj, Bangladesh. These were digestible and examined, during this study. Quantifications of various metals from the composite specimens were created by Atomic Absorption spectrophotometer strategies (AAS) against commonplace activity plot. The frequency of metals were determined within the order of soil > waters. Concentration of the following metals Cd, Cr, Cu, Fe, Mn, Zn, Ca and Mg for soil samples is more than that of water samples. With increasing concentrations of Co, Ni, Na and K were determined in waters compared to soils. Very low concentrations of metals were found from water samples. The Fe, Cr, Ni, Na and Mn concentrations exceeded the approved permissible levels in soils specimens and rests were among permissible limit.

The fruits of the doum palm tree, Hyphaene thebaica are one of the oldest relish fruit. This study analyzed the chemical composition (both proximate and the mineral contents) of this plant, as well as its antioxidant property. The mineral content was determined by atomic absorption spectrophotometry, while the proximate and phytochemical analyses were carried out using standard procedures at Bayero University, Kano. The fruit were found to contain some minerals including K (3366.21 mg/100 g), Ca (292.04 mg/100 g), Na (212.27 mg/100 g), Mg (177.14 mg/100 g), Fe (4.86 mg/100 g), Mn (0.83 mg/100 g), Zn (0.68 mg/100 g), Cu (0.40 mg/100 g), Ni (0.32 mg/100 g) and Co (0.12 mg/100 g). The proximate composition of the doum palm fruit pulp reveals protein (2.86%), lipid (0.92%), ash content (6.24%), crude fiber (12.87%), moisture content (8.64%) and carbohydrate 68.47%. The DPPH radical scavenging efficacy of the ethanol extract of the fruit of the doum palm tree was analyzed at different concentrations of the extract. At concentration 0.0625 mg/mL, 0.125 mg/mL, 0.250 mg/mL and 0.500 mg/mL the extract showed inhibitory activity of 31%, 61%, 72% and 81% respectively. Thus the doum palm fruit pulp extract possess potential antioxidant properties.

This study involves a development method for spectrophotometric analysis of sulfamethoxazole (SMZ) with vanillin reagent in acidic medium. The reaction mechanism was proposed by Schiff's base reaction of the amine group in SMZ with the carbonyl group in vanillin. The spectrum of SMZ complex showed high absorbance at 399.09 nm following the Beer–Lambert law in the concentration levels ranging from 5 to 80 µg.mL^-1 with good sensitivity. The stability constant of the product was determined. The values of relative standard deviation (≤ 6.63) and recovery (> 98.73%) indicated a reasonably precise and accurate method with a good limit of detection and quantification. The present method was compared with other spectrophotometric methods in the literature. The procedure of the method showed to be simple since no need for temperature control and solvent extraction. The suggested method was used to determine of SMZ in commercial pharmaceutical drops and compared with the certified method.