Pharmacological studies on tetracycline and tetracycline nanoemulsion formulas. Mohamed S. Saber1, Aziza M. Amer2, Shymaa A. ElBadawy2, Mohamed M. Amer3, 1.	PhD student in Pharmacol. , Vet. Service Division, Ministry of Defense, Egypt.. 2.	2. Dept. of Pharmacol., Facult. Vet. Med., Cairo University, Giza, Egypt. 3.	3. Dept. of Poult. Dis., Facult. Vet. Med., Cairo University, P.O. 12211, Giza, Egypt.

Saber, Mohamed; Amer, Aziza M.; El-Badawy, Shymaa; Amer, M. M.

doi:10.21608/ejvs.2018.6573.1056

Cited by 3 publications

(3 citation statements)

References 29 publications

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“…A commercial interfacing and automation software Lab VIEW was used for acquisition of data. More information can be found elsewhere [33]. The error percent of ε' & tanδ measurements amounts to 1% and 3%, respectively.…”

Section: Techniquesmentioning

confidence: 99%

Physical, dielectric and biodegradation studies of PVC/silica nanocomposites based on traditional and environmentally friendly plasticizers

Saied

Ward

2020

Adv. Nat. Sci: Nanosci. Nanotechnol.

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PVC/nano-SiO 2 nanocomposites based on a bio-based plasticiser (castor oil) and dioctyl phthalate (DOP) were prepared using solution casting method. Castor oil (CO) was used as a complete alternate plasticiser of dioctyl phthalate (DOP) in PVC. The prepared films were characterised by different techniques. In addition, the biodegradation of the films was tested by soil burial, hydrolytic and enzymatic degradation tests. The presence of CO facilitates the dispersion of SiO 2 in PVC matrix and enhances the thermal stability. Besides, it has a significant contribution in reduction of HCl emission during the decomposition of PVC nanocomposites. FTIR spectra of the nanocomposite films showed a considerable change in the intensity of the characteristic peaks of the functional group by addition of SiO 2 and after proceeding hydrolytic and enzymatic degradation as well. Additionally, the presence of SiO 2 plays a dominant role in improving the migration stability and volatility of the plasticiser. Further, the permittivity (ε'), loss factor (tanδ), electric modulus (M') and conductivity (σ) of PVC were also investigated. It is found that the values of ε' and σ of PVC/CO/SiO 2 nanocomposites are higher compared to those of PVC/DOP/SiO 2 nanocomposites. Moreover, electric modulus (M') demonstrates two dielectric relaxation processes. The conductivity values revealed that PVC nanocomposites can perform as antistatic materials. This makes them a good choice for electronic components packaging.

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Section: Techniquesmentioning

confidence: 99%

Physical, dielectric and biodegradation studies of PVC/silica nanocomposites based on traditional and environmentally friendly plasticizers

Saied

Ward

2020

Adv. Nat. Sci: Nanosci. Nanotechnol.

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“…The impedance analyser was linked to a computer using a GPIB cable (IEE488) to automate the measurements and calculations. Data was assembled using the commercial interfacing and automation programmed Lab VIEW [32]. The measurements' error percentages are 1%-3%.…”

Section: Methodsmentioning

confidence: 99%

Preparation and characterization of PMMA/ZnO nanocomposites for antistatic and biomedical applications

Saied¹,

Nour²

2023

Adv. Nat. Sci: Nanosci. Nanotechnol.

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Polymethyl methacrylate (PMMA)/Palm oil/ZnO nanocomposite films of concentrations 0, 0.5, 1, 2, 5, 10, and 15 wt% were prepared by solution casting technique. Tween 80 was used as a surfactant. The prepared films were characterised by different techniques in addition to antimicrobial and cytotoxicity tests. The scanning electron microscope (SEM) micrographs of fractured surfaces of the films showed that palm oil (PO) and Tween 80 enhanced ZnO NPs dispersion. An excess ZnO loading led to polymer saturation with ZnO NPs which accumulate on PMMA surface. X-ray diffraction (XRD) measurements confirmed SEM results as the crystallinity increased by ZnO NPs loading and decreased by excess loading. In addition, the presence of PO and Tween 80 enhanced thermal stability of pure PMMA and the optimum concentration is 0.5 wt% ZnO NPs. Further, the permittivity (ε′), dielectric loss (ε′′), and electrical conductivity (σ) were investigated. It was found that PO addition increased the values of ε′, ε′′, and σ of PMMA. Upon ZnO loading, these values increased up to 10 wt% ZnO NPs then decreased upon reaching 15 wt% ZnO NPs. The conductivity values revealed that the prepared nanocomposites can perform as antistatic materials for lower ZnO content and electrostatic dissipation application at 10 wt% ZnO. The antimicrobial and cytotoxicity studies revealed that the prepared films are nontoxic and the antimicrobial properties of the films against Staphylococcus aureus, Enterococcus faecalis and Candida albicans were enhanced by PO and ZnO NPs addition.

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“…To the best of our knowledge, few attempts (if any) have been made so far to undertake a similar study. In particular, our study tackles the ongoing discussion on crypto cybersecurity (or simply security) by adopting the grounded theory approach developed by Glaser and Strauss [ 17 ], in particular by adapting analytical thinking [ 18 ] and sampling strategies [ 19 ]. Taking into account the general notion of cybersecurity, in our view, its multidimensional nature considered in the context of cryptocurrencies can be further conceptualized within two mainstream areas, namely: technological and human.…”

Section: Introductionmentioning

confidence: 99%

Security of Cryptocurrencies: A View on the State-of-the-Art Research and Current Developments

Weichbroth

Wereszko

Anacka

et al. 2023

Sensors

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[Context] The goal of security is to protect digital assets, devices, and services from being disrupted, exploited or stolen by unauthorized users. It is also about having reliable information available at the right time. [Motivation] Since the inception in 2009 of the first cryptocurrency, few studies have been undertaken to analyze and review the state-of-the-art research and current developments with respect to the security of cryptocurrencies. [Purpose] We aim to provide both theoretical and empirical insights into the security landscape, in particular focusing on both technical solutions and human-related facets. [Methodology] We used an integrative review which could help in building science and scholarly research, the basis for conceptual and empirical models. [Results] Successful defense against cyberattacks depends on technical measures on the one hand, as well as on self-education and training with the aim to develop competence, knowledge, skills and social abilities, on the other. [Contribution] Our findings provide a comprehensive review for the major achievements and developments of the recent progress on the security of cryptocurrencies. [Future research] Since there is increasing interest in adoption of the current solutions within the central bank digital currencies, the future research should explore the development and inception of effective measures against social engineering attacks, which still remain the main concern.

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Cited by 3 publications

References 29 publications

Physical, dielectric and biodegradation studies of PVC/silica nanocomposites based on traditional and environmentally friendly plasticizers

Physical, dielectric and biodegradation studies of PVC/silica nanocomposites based on traditional and environmentally friendly plasticizers

Preparation and characterization of PMMA/ZnO nanocomposites for antistatic and biomedical applications

Security of Cryptocurrencies: A View on the State-of-the-Art Research and Current Developments

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