scholarly journals The synthesis and characterization of benzotriazole-based cationic surfactants and the evaluation of their corrosion inhibition efficiency on copper in seawater

RSC Advances ◽  
2019 ◽  
Vol 9 (46) ◽  
pp. 27069-27082 ◽  
Author(s):  
M. A. Migahed ◽  
Ahmed Nasser ◽  
H. Elfeky ◽  
M. M. EL-Rabiei
Keyword(s):  
Cationic Surfactants ◽  
Corrosion Inhibitors ◽  
Inhibition Efficiency ◽  
Electrochemical Techniques ◽  
Synthesis And Characterization ◽  
Force Microscopy ◽  
Copper Electrodes ◽  
Atomic Force ◽  
Corrosion Inhibition Efficiency

Three cationic surfactants based on benzotriazole were prepared and their efficiencies as corrosion inhibitors for copper electrodes in seawater were evaluated using different electrochemical techniques (polarization methods, EIS techniques and atomic force microscopy).

Synthesis and Characterization of Supported Bioactive Lipid Membranes

1997 ◽  
Vol 489 ◽  
Author(s):  
Theodore M. Winger ◽  
Elliot L. Chaikof
Keyword(s):  
Lipid Membranes ◽  
Room Temperature ◽  
Synthesis And Characterization ◽  
Peptide Conjugates ◽  
Force Microscopy ◽  
Atomic Force ◽  
Membrane Mimetic ◽  
Phosphate Buffered Saline ◽  
Mixed Systems

AbstractSingle and multicomponent membrane-mimetic surfaces of DPPC and synthetic lipid-peptide conjugates were formed on an alkylated glass surface by a process of vesicle fusion. Correlative atomic force microscopy and radiochemical titration techniques confirmed the generation of a single substrate supported monolayer and predictable deposition of defined concentrations of lipopeptide. Mixed systems were stable for periods exceeding 1 month if stored at room temperature in phosphate buffered saline.

scholarly journals Analysis, Synthesis and Characterization of Thin Films of a-Si:H (n-type and p-type) Deposited by PECVD for Solar Cell Applications

Materials ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 6349
Author(s):  
Abel Garcia-Barrientos ◽  
Jose Luis Bernal-Ponce ◽  
Jairo Plaza-Castillo ◽  
Alberto Cuevas-Salgado ◽  
Ariosto Medina-Flores ◽  
...  
Keyword(s):  
Thin Films ◽  
Solar Cells ◽  
Optical Band Gap ◽  
Synthesis And Characterization ◽  
Force Microscopy ◽  
The Third ◽  
Atomic Force ◽  
Uv Visible ◽  
P Type

In this paper, the analysis, synthesis and characterization of thin films of a-Si:H deposited by PECVD were carried out. Three types of films were deposited: In the first series (00 process), an intrinsic a-Si:H film was doped. In the second series (A1–A5 process), n-type samples were doped, and to carry this out, a gas mixture of silane (SiH4), dihydrogen (H2) and phosphine (PH3) was used. In the third series (B1–B5 process), p-type samples were doped using a mixture of silane (SiH4), dihydrogen (H2) and diborane (B2H6). The films’ surface morphology was characterized by atomic force microscopy (AFM), while the analysis of the films was performed by scanning electron microscopy (SEM), and UV–visible ellipsometry was used to obtain the optical band gap and film thickness. According to the results of the present study, it can be concluded that the best conditions can be obtained when the flow of dopant gases (phosphine or diborane) increases, as seen in the conductivity graphs, where the films with the highest flow of dopant gas reached the highest conductivities compared to the minimum required for materials made of a-Si:H silicon for high-quality solar cells. It can be concluded from the results that the magnitude of the conductivity, which increased by several orders, represents an important result, since we could improve the efficiency of solar cells based on a-Si:H.

scholarly journals Synthesis and Characterization of the Fluorescent Self-Assembled Structures Formed by Benzothiazolone Conjugates and Applications in Cellular Imaging

2021 ◽  
Author(s):  
Nidhi Gour ◽  
Vivekshinh Kshtriya ◽  
Bharti Koshti ◽  
Ankit Gangrade ◽  
Ashadul Haque ◽  
...  
Keyword(s):  
Mammalian Cells ◽  
Cell Imaging ◽  
The Self ◽  
Synthesis And Characterization ◽  
Force Microscopy ◽  
Imaging Tool ◽  
Atomic Force ◽  
Mechanisms Of Formation ◽  
Self Assembled

<p>We report <a>the synthesis and characterization of self-assembled</a> structures formed by4-Choro-2(3H)-benzothiazolone (<b>VK</b>) to panchromatic fibers and its application as cell imaging tool. The aggregation properties ofthe synthesized compounds have been studied extensively under different solvent and concentrationand theirmorphologies examined at supramolecular level was observed by microscopic techniques like optical microscopy, fluorescence microscopy, and atomic force microscopy(AFM). Interestingly, the self-assembled structures formed by <b>VK</b>reveal panchromatic emission properties andshow blue, green and red fluorescence under different excitation filters. The intensity of the fluorescence observed was blue>green>red and the dye interestingly do not show any fluorescence quenching, on the other hand reveal photoactive properties under green channel. The mechanisms of formation of the self-assemblies were studied through different techniques like concentration dependent NMR and,UV visible spectroscopy and fluorescencemicroscopic studies.Finally, the utility of <b>VK</b> for cell imaging applications is demonstrated and it can be noted that <b>VK</b> can be efficientlyup taken by mammalian cells and the stained cells reveal panchromatic emission under blue, green and red channel.<b></b></p>

scholarly journals Synthesis and Characterization of the Fluorescent Self-Assembled Structures Formed by Benzothiazolone Conjugates and Applications in Cellular Imaging

2021 ◽  
Author(s):  
Nidhi Gour ◽  
Vivekshinh Kshtriya ◽  
Bharti Koshti ◽  
Ankit Gangrade ◽  
Ashadul Haque ◽  
...  
Keyword(s):  
Mammalian Cells ◽  
Cell Imaging ◽  
The Self ◽  
Synthesis And Characterization ◽  
Force Microscopy ◽  
Imaging Tool ◽  
Atomic Force ◽  
Mechanisms Of Formation ◽  
Self Assembled

<p>We report <a>the synthesis and characterization of self-assembled</a> structures formed by4-Choro-2(3H)-benzothiazolone (<b>VK</b>) to panchromatic fibers and its application as cell imaging tool. The aggregation properties ofthe synthesized compounds have been studied extensively under different solvent and concentrationand theirmorphologies examined at supramolecular level was observed by microscopic techniques like optical microscopy, fluorescence microscopy, and atomic force microscopy(AFM). Interestingly, the self-assembled structures formed by <b>VK</b>reveal panchromatic emission properties andshow blue, green and red fluorescence under different excitation filters. The intensity of the fluorescence observed was blue>green>red and the dye interestingly do not show any fluorescence quenching, on the other hand reveal photoactive properties under green channel. The mechanisms of formation of the self-assemblies were studied through different techniques like concentration dependent NMR and,UV visible spectroscopy and fluorescencemicroscopic studies.Finally, the utility of <b>VK</b> for cell imaging applications is demonstrated and it can be noted that <b>VK</b> can be efficientlyup taken by mammalian cells and the stained cells reveal panchromatic emission under blue, green and red channel.<b></b></p>

scholarly journals Niclosamide and dichlorphenamide: new and effective corrosion inhibitors for carbon steel in 1M HCl solution

2021 ◽  
Vol 3 (3) ◽  
Author(s):  
A. S. Fouda ◽  
H. S. El-Desoky ◽  
M. A. Abdel-Galeil ◽  
Dina Mansour
Keyword(s):  
Carbon Steel ◽  
Corrosion Inhibitors ◽  
Inhibition Efficiency ◽  
Mass Reduction ◽  
Force Microscopy ◽  
Langmuir Adsorption ◽  
Atomic Force ◽  
Modulation Techniques ◽  
Impedance Parameters ◽  
Cathodic And Anodic Processes

Abstract This research demonstrates the effect of some amide compounds (1 and 2) as corrosion inhibitors on C-steel in 1.0 M of hydrochloric solutions utilizing mass reduction studies, electrochemical [potentiodynamic (PP), AC impedance measurements (EIS), electrochemical frequency modulation] techniques, and surface checks were used to illustrate the importance of amide compounds to the corrosion protection process of C-steel. The tests displayed that the inhibition efficiency (IE%) augmented with increase in amide dose but reduced with growth of temperature. The highest inhibition efficiency is 99% for compound (1) and 98.8% for compound (2) at maximum dose tested (50 µM) by polarization method. PP data show that these compounds affect both cathodic and anodic processes (i.e. mixed type) and were adsorption on the carbon steel obeying Langmuir adsorption isotherm. The EIS results indicate that the changes in impedance parameters are related to the adsorption of amides on the alloy surface. Scanning of electron microscopy, energy transmitted X-ray—Atomic force microscopy studied the morphology of inhibited C-steel. Graphic abstract

scholarly journals Synthesis and characterization of graphene oxide/ gold nanoparticles/ dibenzothiophene heterogeneous nanostructures

2020 ◽  
Vol 65 (9) ◽  
pp. 777-782
Author(s):  
Fatma Bayrakçeken NİŞANCI ◽  
Keyword(s):  
Electron Microscopy ◽  
Graphene Oxide ◽  
Photocatalytic Oxidation ◽  
Synthesis And Characterization ◽  
Au Nps ◽  
Adsorption Time ◽  
Force Microscopy ◽  
Atomic Force ◽  
Transmission Electron

This work examines the effect of gold nanoparticle (Au NP)- graphene oxide (GO) on the adsorption of dibenzothiophene (DBT) compounds. Au NP-GO were also used as an absorbent to produce nanoscale samples of DBT selfassembled monolayers (SAMs) on Au NP-GO. The influences of DBT adsorption on the size and the time of patterns were investigated. Atomic force microscopy (AFM) and Transmission electron microscopy (TEM) measurements showed that all of the uniformly distributed on Au NP- GO preliminary results indicated that the diameter and the density of DBT adsorptive can be controlled by controlling concentration of GO and Au NP and adsorption time during DBT the stage of SAMs. Photocatalytic oxidation of DBT was studied over Au NPs incorporated DBT Au NP-GO- DBT catalyst under UV radiation.

Morphological investigations on mesostructured metal oxides

1997 ◽  
Vol 12 (6) ◽  
pp. 1634-1639 ◽  
Author(s):  
V. Weidenhof ◽  
F. Gropper ◽  
U. Müller ◽  
L. Marosi ◽  
G. Cox ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Synthesis And Characterization ◽  
Titanium Oxides ◽  
X Ray ◽  
Force Microscopy ◽  
Lamellar Structures ◽  
Atomic Force ◽  
Transmission Electron ◽  
Xrd And Tem

The synthesis and characterization of mesostructured zirconia and titanium oxides are presented. The samples were investigated by x-ray powder diffraction (XRD), transmission electron microscopy (TEM), and atomic force microscopy (AFM). XRD and TEM revealed only lamellar structures for both materials, whereas AFM could detect locally restricted initial stages of cubic or hexagonal phases in a globally lamellar Ti oxide.

Rapid, Refined, and Robust Method for Expression, Purification, and Characterization of Recombinant Human Amyloid-beta M1-42

2019 ◽  
Author(s):  
Priya Prakash ◽  
Travis Lantz ◽  
Krupal P. Jethava ◽  
Gaurav Chopra
Keyword(s):  
Amyloid Beta ◽  
Western Blots ◽  
Force Microscopy ◽  
E Coli ◽  
Atomic Force ◽  
Set Up ◽  
Short Time

Amyloid plaques found in the brains of Alzheimer’s disease (AD) patients primarily consists of amyloid beta 1-42 (Ab42). Commercially, Ab42 is synthetized using peptide synthesizers. We describe a robust methodology for expression of recombinant human Ab(M1-42) in Rosetta(DE3)pLysS and BL21(DE3)pLysS competent E. coli with refined and rapid analytical purification techniques. The peptide is isolated and purified from the transformed cells using an optimized set-up for reverse-phase HPLC protocol, using commonly available C18 columns, yielding high amounts of peptide (~15-20 mg per 1 L culture) in a short time. The recombinant Ab(M1-42) forms characteristic aggregates similar to synthetic Ab42 aggregates as verified by western blots and atomic force microscopy to warrant future biological use. Our rapid, refined, and robust technique to purify human Ab(M1-42) can be used to synthesize chemical probes for several downstream in vitro and in vivo assays to facilitate AD research.

Inhibition of pipeline steel corrosion in acidic environment using sulphadoxine and pyrimethamine

2019 ◽  
Author(s):  
Chem Int
Keyword(s):  
Inhibition Efficiency ◽  
Pipeline Steel ◽  
Electrochemical Techniques ◽  
Steel Corrosion ◽  
Acidic Environment ◽  
Inhibitor Concentration ◽  
Adsorption Data ◽  
Corrosion Inhibition Efficiency ◽  
Inhibitive Action ◽  
Sulphadoxine Pyrimethamine

The anti-corrosive properties of sulphadoxine + pyrimethamine (S+P) on the corrosion of pipeline steel in acidic environment were investigated using electrochemical techniques. The results obtained showed an excellent inhibition efficiency which increased with increase in inhibitor concentration. The corrosion inhibition efficiency increased up to 99.04 % at 0.01M S+P and decreased with rise in temperature down to 85.93 % at 333 K and 0.01 M S+P, suggesting a physiosorptive mechanism of adsorption. Also the adsorption data was fitted into Langmuir and Temkin adsorption isotherms, while the inhibitive action was shown to proceed by mixed inhibition mode.

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