The study investigates the green competitive advantage in the Egyptian business environment. A qualitative analysis used primary data from the first quarter of 2023. It allowed us to answer the ...questions that tackle the motives of cleaner production, the reflection of cleaner output on the green brand image, and estimate the impact of the green brand image on the competitive advantage. The study found a mediating role of a green brand image between cleaner production and green competitive advantage. In addition, the significant motives for cleaner production at Egyptian companies were regulatory rules, consumer pressures, and green creativity. Finally, a green brand image substantially reinforces the green competitive advantage of Egyptian companies. The results may be instrumental for companies seeking a faster transition towards green competitive advantage.
The study investigated impression and corporate image management through a qualitative analysis that included three social networking platforms (Instagram, Twitter, and Facebook). Four hundred-seven ...users of Egyptian telecommunications services participated. They used four service providers: Telecom Egypt, Vodafone, Orange, and Etisalat Misr. Primary data was collected during January - March 2023. According to the statistical analysis, there is a difference in impression management practices and corporate image creation in the Egyptian telecommunication industry. The author revealed the contribution of social media platforms to building corporate image via impression management. The change in impression management explains 74.3% of the difference in the corporate image. A study of the effective contribution of social media platforms to the company's image-building reveals the differences in platform user characteristics. The study’s limitation was one country's and one industry's scope. Therefore it is suggested to re-test raised hypotheses in other countries and industries.
•New FeLphen, Colphen and Nilphen complexes were synthesized, characterized and theoretically investigated.•Optimization and vibrational study of the new compounds were performed using DFT ...approach.•The reactivity of the new compounds was evaluated using frontier orbitals studies.•In vitro evaluation of the synthesized compounds shows a good antimicrobial activity.•Molecular docking against 2VF5, 4FXQ, and 3cku was explored.•The experimental results are in good agreement with the theoretical investigation.
Three new FeLphen, CoLphen and NiLphen hetero-ligand were synthesized, characterized and theoretically investigated. The new complexes were based on phenylalanine (Hphen) and 1-{(E)-(4-methylphenyl)iminomethyl}-2-naphthol Schiff-base (HL). The results showed interesting structural variety as octahedral for FeLphen (Fe(L)(phen)(Cl)(H2O)), CoLphen (Co(L)(phen)(H2O)2) and tetrahedral for NiLphen (Ni(L)(phen)). The molecular properties, geometric optimization, vibrational, frontier molecular orbital, and energy evaluation of the new complexes were characterized theoretically using density functional theory (DFT) approach. The calculations were performed to find out the most reliable cis/trans (Chloride and/or H2O) and the (HL/Hphen) orientations around the Fe(III)/Co(II) and Ni(II) center. The calculations revealed that trans-H2O/Cl-cis-NHL/NHphen & cis-H2O/H2O-cis-NHL/NHphen and cis-NHL/NHphen were the most stable orientations for the FeLphen, CoLphen and NiLphen, respectively. Furthermore, the antibacterial and antifungal activity of the titled compounds was in vitro screened. The results showed that the metal complexes exhibited higher pathogenic effect than the free ligands against the selected microbes. Molecular docking investigation against 2VF5, 4FXQ, and 3cku, was carried out to provide deep insights into their role in inhibiting the growth of pathogenic microbes. Comparative analysis elucidated higher antibacterial and antifungal activity of the titled compounds compared with literature survey.
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Computational exploration has been carried out on three p-tertbutylthiacalix4arene derivatives, namely cone (a), partial-cone (b), and 1,3-alternate (c). These three compounds are recently ...synthesized in high yields (80, 95, and 85%, respectively) and characterized by our group, which showed high uptake efficacy of alkali, heavy, and transition metal ions via liquid–liquid extraction. Significantly, these compounds exhibited high uptake capacity for Cu(II) (74.9 %) and Pb(II) (80.0%) upon using cone (a), and partial-cone (b), respectively.
In this study, in order to optimize how the thiacalix4arene (as a nucleophilic) interacts with the metal ion (as an electrophile), DFT calculations were undertaken. Theoretical IR and UV–Vis spectral features of the titled compounds were computed and compared with their experimental values. Chemical reactivity was ranked based on selected electronic chemical descriptors. Moreover, the active sites of the three compounds were determined by molecular electrostatic potential (MEP) maps. Furthermore, non-linear optical (NLO) properties were investigated and compared with urea as reference material. The results of NLO characteristics showed that the subject compounds are excellent candidates as NLO materials. The enhancement of NLO properties can be qualitatively explained by means of high charge transfer pattern.
In this study, 2-(carbamothioylhydrazono)methyl-phenyl-4-methylbenzenesulfonate
(CHMPMBS)
, which exhibits selective colorimetric chemosensor properties for Cu(II) ions, was synthesized and ...characterized by NMR and FT-IR spectroscopy. The
CHMPMBS
chemosensor demonstrated high sensitivity and selectivity toward Cu(II) in an aqueous media in the presence of many other competing cations (Na(I), Mg(II), Al(III), K(I), Ca(II), Cr(III), Mn(II), Fe(III), Fe(II), Co(II), Ni(II), Cu(II), Zn(II), Sr(II), Ag(I), Cd(II), Ba(II), and Pb(II). By forming a complex of 1: 1 stoichiometry (Cu:
CHMPMBS
) with Cu(II), the developed chemosensor gave a distinctive color change from pale yellow to pale green.
CHMPMBS
exhibits a rapid and accurate colorimetric assay for naked-eye detection of Cu(II) ions with a detection limit of 8.12 µM. Furthermore, the potential application of
CHMPMBS
has been extended to detect Cu(II) ions with functional recovery in both natural and simulated water samples. Furthermore, the Cu(II)-
CHMPMBS
complex was synthesized and characterized. The thermodynamic (Δ
G
, Δ
H
, and Δ
S
) and kinetic (
E
a
) parameters were investigated at four temperatures. Further, the binding constant of
CHMPMBS
, which binds to Cu(II) ions according to 1:1 stoichiometry, was determined to be 2.47 × 10
4
M
−1
.
Graphical Abstract
We report on the numerical simulation results of the propagation of Fourier-transformed super-Gaussian beams with cubic phase modulation, which we refer to as super-Airy beams. We show the effect of ...the truncation profile on the propagation of the "Airy" intensity distribution and propose methods to improve the non-diffracting propagation length. We show that super-Gaussian beams with cubic phase modulation would form, what we believe to be, truncated Airy beams after being optically Fourier-transformed. The results show that Airy beams with smaller curvature would preserve their non-diffracting characteristics for longer propagation distances than Airy beams with larger curvature. Airy beam curvature is a controllable parameter by the phase transformation step. The presented results suggest that Fourier-transforming super-Gaussian beams with cubic phase modulation would form Airy beams with up to > 350% increase in their non-diffracting propagation distance compared to Fourier-transformed Gaussian beams.
Here, a new fractional sub-equation method with a fractional complex transform is proposed for constructing exact solutions of fractional partial differential equations arising in plasma physics in ...the sense of modified Riemann–Liouville derivative, which is the fractional version of the known DξαG(ξ)G(ξ) method. To illustrate the validity of this method, we apply it to the space–time fractional KdV equation on the dust ion acoustic waves in dusty plasma and space–time Boussinesq fractional equation. The proposed approach is efficient and powerful for solving wide classes of nonlinear evolution fractional order equations. The solutions obtained here are new and have not been reported in former literature.
A new heterocyclic azo dye ligand (L) was synthesized by the combination of 4-amino antipyrine with 4-aminophenol. The new Cr(III), Mn(II), Fe(III), Co(II), Ni(II), Cu(II), Zn(II), and Cd(II) ...complexes were synthesized in excellent yields. The metal chelate structures were elucidated using elemental analyses, FT-IR,
H-NMR, mass, magnetic moment, diffused reflectance spectral and thermal analysis (TG-DTG), and molar conductivity measurement. According to the FT-IR study, the azo dye ligand exhibited neutral tri-dentate behavior, binding to the metal ions with the azo N, carbonyl O, and protonated phenolic OH. The
H-NMR spectral study of the Zn(II) complex supported the coordination of the zo dye ligand without proton displacement of the phenolic OH. Diffused reflectance and magnetic moment studies revealed the octahedral geometry of the complexes, as well as their good electrolytic nature, excepting the Zn(II) and Cd(II) complexes, which were nonelectrolytes, as deduced from the molar conductivity study. The theoretical calculations of optimized HOMO-LUMO energies, geometrical parameters, electronic spectra, natural atomic charges, 3D-plots of MEP, and vibrational wavenumbers were computed and elucidated using LANL2DZ and 6-311G (d, p) basis sets of density functional theory (DFT) with the approach of B3LYP DFT and TD-DFT methods. The ligand and complexes have been assayed for their antimicrobial activity and compared with the standard drugs. Most of the complexes have manifested excellent antimicrobial activity against various microbial strains. A molecular docking investigation was also performed, to acquire more information about the binding mode and energy of the ligand and its metal complexes to the
receptor using molecular docking. Altogether, the newly created ligand and complexes showed positive antibacterial effects and are worth future study.
Abstract
Although crop plants provide the majority of human food, pests and insects frequently cause huge economic losses. In order to develop innovative insecticidal compounds with low toxicity and ...a positive environmental impact, we developed new
N
-(4-sulfamoylphenyl)-1,3,4-thiadiazole-2-carboxamide derivatives (
2–12
). With the use of spectroscopic techniques and elemental data, the chemical structure of these new compounds was meticulously clarified. The toxicological and biological effects of the synthesized compound of the cotton leafworm
Spodoptera littoralis
(Boisduval, 1833) under laboratory conditions were also investigated. Regarding the determined LC
50
values, compounds
3, 7, 8
, and
10
showed the most potent toxic effect with LC
50
values of 29.60, 30.06, 27.65 and 29.01 ppm, respectively. A molecular docking investigation of twelve synthetic compounds (from compound
2
to compound
12
) was performed against AChE (Acetylcholinesterase). There was a wide range of binding affinities shown by these compounds. This work suggests that these substances may have insecticidal and AChE inhibitory properties, and it may be possible to further explore them in the process of creating pesticides that target AChE.
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