Mansoura University, Faculty of AgricultureJournal of Agricultural Chemistry and Biotechnology2090-362614120230101Impact of Cyanobacteria Inoculation on some Physical and Chemical Properties of Soils with Different Texture1627862110.21608/jacb.2022.178369.1039ENAida H.AfifyMicrobiol. Dept., Fac. Agric., Mansoura Univ., Mansoura, Egypt.Mohamed H.ShetaSoils and Water Department, Faculty of Agriculture, Al-Azhar University, Cairo, Egypt.0000-0002-2810-0148Aml S.ElzallalMicrobiol. Dept., Fac. Agric., Mansoura Univ., Mansoura, Egypt.Journal Article20230105The impact of cyanobacterial species (<em>Nostoc lichenoides</em>, <em>Nostoc indistinguendun</em>, <em>Nostoc favosum</em>, and their mixtures) on soil characteristics such as water holding capacity (WHC), aggregate size distribution (%) to calculate the mean weight diameter (MWD), organic carbon (OC), total nitrogen content, and total counts of cyanobacteria in sandy and clay loam soils. The results showed that, compared to the un-inoculated soil, inoculation of the soil with cyanobacteria and their mixtures enhanced the soil WHC, MWD, OC, and total nitrogen in both soil types. After 60 days of incubation, the cyanobacterial mixtures produced the best WHC% results. In the case of MWD, the results were more pronounced with cyanobacterial mixtures at 60 days compared with the control in both sandy and clay loam soils, respectively. The organic carbon content of soils increased with increasing incubation period, reaching the highest value in the two soil types at 60 days incubation period. Also, the inoculation with different cyanobacteria species significantly increased the total nitrogen contents of the two tested soils when the incubation period was increased, especially with a mixture of cyanobacteria. At the same time, the results of the total counts of cyanobacteria showed that the highest concentration of the mixture of cyanobacteria was offered 60 days from incubation in clay loam soil (12.00 ×10<sup>4</sup> cfu g<sup>-1</sup> dry soil). Since there has been a significant development, the implanted cyanobacterial species were shown to cover the soil surface, mainly when a mixture of cyanobacterial species was used to inoculate soils.https://jacb.journals.ekb.eg/article_278621_2372476ecd48d90c937a421895155db3.pdfMansoura University, Faculty of AgricultureJournal of Agricultural Chemistry and Biotechnology2090-362614120230101Antioxidant Properties and Total Polyphenolic Contents of Post Distillation Solid Residue Extract from Gamma-Irradiated Clove Buds71228093310.21608/jacb.2023.182297.1040ENA. A.AbdelmoatyPlant Research Department, Nuclear Research Center, Egyptian Atomic Energy Authority, Egypt.F. F. A.FodaBiochemistry Department, Faculty of Agriculture, Benha University, Egypt.M. A.Abo-El-SeoudPlant Research Department, Nuclear Research Center, Egyptian Atomic Energy Authority, Egypt.A. E.El-HadaryBiochemistry Department, Faculty of Agriculture, Benha University, Egypt.Journal Article20230119The current study was carried out to investigate the antioxidant activities of the solid waste residue obtained after removing the essential oils through the distillation of γ-irradiated clove budsat three levels of doses (0, 5 and 10 kGy). The total phenolic and flavonoid contents (TPC and TFC) were assessed followed by HPLC identification and quantification. The DPPH and FRAP methods were used to measure the antioxidant activity. The obtained results showed that 10 KGy doses greatly improved the TPC, TFC, and antioxidant activities of the solid residue of clove buds. Ten phenolic components and eight flavonoid compounds were detected in non-irradiated and irradiated at 10 kGy in methanolic extracts by HPLC. Various levels of methanolic extract of the solid residue of irradiated clove buds at dose level of 10 kGy(100, 200, and 400 mg/L)were tested for these antioxidant activities against the oxidative changes in sunflower oil compared with control and BHT-treated samples. The sample containing clove solid residue at levels of 400 mg/L showed a good potential for oxidative stability (6.95h). Finally, the data obtained demonstrated that clove extracts are a promising source of bioactive components and a natural supply of antioxidant compounds. Hence, it also offers a variety of possible applications in the food and pharmaceutical industries.https://jacb.journals.ekb.eg/article_280933_f89751ae0a78c7dfee76bfa90f421355.pdf