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Volume 5 Number 11 November 2019

Antifungal Potent of Some Metallic Nanoparticles against Sclerotinia Sclerotiorum on Common Bean Plants: An Emphasis for Biochemical Alterations and Metal Accumulation


Authors: Khaled Y. Abdel-Halim ; Abeer A. El-Ghanam
Pages: 93-106
DOI: doi.org/10.32861/ajls.511.93.106
Abstract
Antifungal efficacy for some oxides of metallic nanoparticles (NPs) e.g. magnesium (MgO), copper (CuO), silicon (SiO2) and zinc (ZnO) was evaluated against fungi, Sclerotinia sclerotioum on bean plants under different conditions. The examined NPs exhibited significant effect on hyphal morphology and fungal linear growth under field trail in the following order: MgONPs> SiO2NPs> ZnONPs> CuONPs compared with control group. However under storage condition, the disease severity along NPs-treated bean pods were in the order: MgONPs> SiO2NPs> ZnONPs> CuONPs compared with infected control which did not exceed 30.23% and non-infected (14.68%). Bean pods treated with NPs showed significantly increase in chlorophyll content, total phenols, and ascorbic acid compared with non-infected pods during storage period for 4 weeks. The examined NPs exhibited positive accumulation in pods tissues, except MgO was lower than non-infected group. The present findings may display the potential effect metal oxides in agricultural sector need more studies to achieve their adverse effects on consumers and environmental impacts.

Synthesis of Some Acetophenone Oximes and Their Corresponding Bridged Terphthaloyl Oxime Esters


Authors: Ramadan Ali Bawa ; Mona Mohammed Friwan
Pages: 87-92
DOI: doi.org/10.32861/ajls.511.87.92
Abstract
The objective of this study is to synthesize a number of oximes along with their terphthaloyl oxime esters derived from acetophenone, 4-methylacetophenone, 4-hydroxyacetophenone, 4-aminoacetophenone and 4-nitroacetophenone as a part of ongoing research. Five acetophenone oximes have been synthesized by refluxing the acetophenone derivative with a solution of hydroxylamine hydrochloride in the presence of potassium hydroxide. The corresponding acetophenone oximes were obtained as solid materials in moderate to good yields. The structures of the resulting oximes were confirmed using IR, NMR and mass spectrometer. The HNMR data revealed that one oxime of the synthesized oximes was obtained as a mixture of two E/Z isomers in a ratio of (8:1). These resulting oximes were subjected into an esterification process with the terphthaloyl chloride in molar ratio of (1:2) respectively. The esterification reaction was carried out under basic conditions at 0 – 5 ºC then room temperature. The five corresponding bridged terphthaloyl oxime esters have been formed as solid materials in moderate yields. The structures of the obtained terphthaloyl esters were also confirmed by spectroscopic techniques such as IR, NMR and mass spec.