Sobhy ElsilkTanta University · Department of Botany
Sobhy Elsilk
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20
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Publications (20)
Background
The biosynthesis of zinc oxide nanoparticles (ZnO NPs) using Enterobacter sp. and the evaluation of their antimicrobial and copper stress (Cu+ 2)-reducing capabilities in Vicia faba (L.) plants. The green-synthesized ZnO NPs were validated using X-ray powder diffraction (XRD); Fourier transformed infrared (FTIR), Ultraviolet-Visible spec...
In this work, the elimination of methyl blue (MB) acidic dye from an aqueous solution was investigated using two types of modified montmorillonite. One was modified with dimethyl benzyl hydrogenated tallow ammonium chloride which was named claytone (APA). The other montmorillonite is modified with poly oxy propylene diamine (Jeffamine D-2000) and w...
Reaction of 2,4-bis(3,5-dimethyl-1H-pyrazol-1-yl)-6-methoxy-1,3,5-triazine (MBPT) pincer ligand with FeCl3 in acidic medium (1:1 v/v) afforded the [Fe(BPT)Cl2(CH3OH)] complex of the hydrolyzed monobasic ligand: 4,6-bis(3,5-dimethyl-1H-pyrazol-1-yl)-1,3,5-triazin-2(1H)-one (HBPT). In this complex, the Fe(III) ion is hexacoordinated with one anionic...
Background: In Egypt, the burning of rice straw became a very serious dilemma that is because of the huge production of straw. Aim: This study aimed to reduce environmental pollution caused by organic wastes e.g. rice straw burning by recycling technology and convert it into a useful, natural product and produce an organic matter hummus-like, with...
Extracellular biosynthesis of gold nanoparticles (AuNPs) becomes a significant approach to NPs preparation. Development in medical diagnostics focuses on the nanomaterials, particularly AuNPs. This study focuses on the biogenic synthesis of AuNPs and, additionally, the use of the chemicals made-up in medical detection of hepatitis C Virus-NS4 (HCV-...
The [Co(BPMT)(H2O)2Cl]Cl; (1), [Co(BPMT)(H2O)3](ClO4)2.H2O; (2), [Co(BPMT)(NO3)2]; (3) and [Co(BPMT)(H2O)3](NO3)2.H2O; (4) pincer complexes of 2,4-bis(3,5-dimethyl-1H-pyrazol-1-yl)-6-methoxy-1,3,5-triazine, (BPMT) ligand were synthesized by self-assembly technique in methanol as solvent. In all complexes, the BPMT acting as a tridentate N-donor pin...
The Schiff bases (4E)-4-((aryl)methyleneamino)-1,2-dihydro-2,3-dimethyl-1-phenylpyrazol-5-one 3 were synthetized by reaction of aromatic aldehydes 1 and 4-aminoantipyrine 2. Compounds 3 were fully characterized by FTIR, ¹H, ¹³C and DEPT-135 NMR spectroscopies, elemental analyses and also by single crystal X-ray diffraction. Hirshfeld surface analys...
The reaction of 2,4-bis(3,5-dimethyl-1H-pyrazol-1-yl)-6-methoxy-1,3,5-triazine (BPT) pincer ligand with zinc(II) nitrate and zinc(II) perchlorate hexahydrate yielded, [Zn(BPT)(NO3)2] (2), and [Zn(BPT)(H2O)Cl]ClO4 (3) complexes, respectively. However, zinc(II) chloride with BPT involved C-N rupture and formed instead [Zn(DMP)2Cl2] (1) complex (DMP =...
The aldoximes E-pyrene-1-carbaldehyde oxime 1 and E-2-naphthaldehyde oxime 2 were synthesized, in ca. 90% yield, by treatment of pyrene-1-carbaldehyde or 2-naphthaldehyde, respectively, with hydroxylamine hydrochloride and sodium carbonate in MeOH. Compounds 1 and 2 were characterized by IR, ¹H and ¹³C{¹H} NMR spectroscopies, elemental analyses and...
The [Ag(Menic)2(ClO4)]2, (1) and [Ag(NA)2]ClO4, (2) complexes, where Menic; methylnicotinate and NA; nicotinamide, were synthesized and characterized using elemental analysis, FTIR, NMR and single crystal X-ray diffraction combined with DFT calculations. The Ag(I) is coordinated with two organic ligand molecules in both complexes. In 1, the coordin...
A new s-triazine bis-Schiff base chelating ligand (L) and two of its heptacoordinated Mn(II) complexes were synthesized and characterized. Reaction of solid Mn(NO3)2·4H2O with methanolic solution of the ligand (L; 5) afford [MnL(MeOH)NO3]NO3.MeOH; (6). While, repeating the reaction in water/methanol solution, the complex [MnL(H2O)2](NO3)2; (7) was...
The synthesis, characterization and molecular structure aspects of the [Ag(3-aminopyridine)]ClO4 coordination polymer have been presented. Single crystal X-ray diffraction (SC-XRD) analysis showed that the asymmetric unit consists of two Ag, one 3-aminopyridine (3APy) and one ionic perchlorate anion. The 3-aminpyridine (3APy) acts as a bridged liga...
The bacteria with a high growth rate were isolated from polluted industrial waste water. The bacteria Bacillus anthracis PS2010 have variable resistant to heavy metals such as Cd, Cu, Co, Zn and Pb. Out of which the minimal inhibitory concentrations were 0.6, 2.0, 0.8, 4.0 and 3.0 mM, respectively. The potent bacterium has optimal biosorption capac...
The bacteria displaying a high growth rate were isolated from polluted industrial waste water. The
bacteria Enterobacter sp. had variable resistant to heavy metals such as Cd, Cu, Co, Zn and Pb. Out of
which the minimal inhibitory concentrations were 0.4, 1.0, 1.0, 2.0 and 3.0 mM, respectively. The potent
bacterium had optimal biosorption capacity...
The bacteria Enterobacter sp. and Bacillus anthracis (avirulent strain) were isolated from a lathe workshop and industrial waste water, respectively. The ability of both isolates to synthesize lead nanoparticles was studied. The relationship between the amount of polysaccharides secreted and metal deposited was demonstrated. The more polysaccharide...
Cell-associated biosynthesis of cadmium sulfide (CdS) nanoparticles has been reported to be rather slow and costly. In this study, we report on a rapid and low cost biosynthesis of CdS using culture supernatants of Escherichia coli ATCC 8739, Bacillus subtilis ATCC 6633 and Lactobacillus acidophilus DSMZ 20079T. The synthesis was performed at room...
The development of reliable and eco-friendly organisms of silver nanomaterials is an important aspect of current nanotechnology research and application. Recently, microorganisms have been explored as potential biofactory for synthesis of silver nanoparticles. In this study, through screening of common bacteria, we report extracellular biosynthesis...
The present study investigated the differences between lipopolysaccharide (LPS) and exopolysaccharide (EPS) in respect to immunological and physical-chemical characterization for possible uses as candidate vaccines against intra-peritoneal (I/P) challenge of virulent Aeromonas hydrophila in mouse model referring to Escherichia coli Dh5α as avirulen...