scholarly journals Surface Properties and Biological Activity of the Synthesized Polymeric Surfactant and its Complexes

2021 ◽  
Vol 11 (3) ◽  
pp. 3678-3688
Keyword(s):  
Electron Microscopy ◽  
Surface Properties ◽  
Cobalt Chloride ◽  
Stannous Chloride ◽  
Surface Characteristics ◽  
Biological Action ◽  
Polymeric Surfactant ◽  
Metal Chlorides ◽  
Vinyl Pyridine ◽  
Scanning Electron

Poly (4-vinyl pyridine) (P4-VP) was quaternized and complexed with salt chloride to obtain polymeric surfactant complexes having to improve surface properties and microbial activity. P4-VP was quarternized by trimethyl chloro silane to give (QP4-VP) (I) and then complexed by using stannous chloride and cobalt chloride to give polymeric surfactant complexes. The quaternized P4-VP and its complexes were characterized by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). Also, the surface properties of this polymeric surfactant and its complexes were studied. The influence of metal chlorides on the antibacterial activity of this polymeric surfactant was estimated and screened through the length of the field of hindrance versus various microorganisms. It shows an enhancement in the surface characteristics and fine germicidal action for quaternized P4-VP when complexed with metal chlorides. The designed cationic polymeric surfactant and its complexes have a good biological action against all such microorganisms.

Photocatalytic activity of TiO2 synthesized by anodization and anodic spark deposition

MRS Advances ◽  
2020 ◽  
Vol 5 (61) ◽  
pp. 3141-3152
Author(s):  
Alma C. Chávez-Mejía ◽  
Génesis Villegas-Suárez ◽  
Paloma I. Zaragoza-Sánchez ◽  
Rafael Magaña-López ◽  
Julio C. Morales-Mejía ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Photocatalytic Activity ◽  
Surface Characteristics ◽  
Amorphous Solids ◽  
X Ray Diffraction ◽  
X Ray ◽  
Catalytic Activities ◽  
Anodic Spark Oxidation ◽  
Porous Surfaces ◽  
Scanning Electron

AbstractSeveral photocatalysts, based on titanium dioxide, were synthesized by spark anodization techniques and anodic spark oxidation. Photocatalytic activity was determined by methylene blue oxidation and the catalytic activities of the catalysts were evaluated after 70 hours of reaction. Scanning Electron Microscopy and X Ray Diffraction analysis were used to characterize the catalysts. The photocatalyst prepared with a solution of sulfuric acid and 100 V presented the best performance in terms of oxidation of the dye (62%). The electric potential during the synthesis (10 V, low potential; 100 V, high potential) affected the surface characteristics: under low potential, catalyst presented smooth and homogeneous surfaces with spots (high TiO2 concentration) of amorphous solids; under low potential, catalyst presented porous surfaces with crystalline solids homogeneously distributed.

THE SCANNING ELECTRON MICROSCOPIC MORPHOLOGY OF QUARTZ IN SELECTED SOILS FROM ALBERTA

1987 ◽  
Vol 67 (4) ◽  
pp. 965-971 ◽  
Author(s):  
J. M. W. BLACK ◽  
M. J. DUDAS
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Surface Morphology ◽  
Surface Characteristics ◽  
Fine Sand ◽  
Parent Material ◽  
Electron Microscopic ◽  
Physical Weathering ◽  
Silica Precipitation ◽  
Scanning Electron

This study compared the surface morphology of quartz grains from A and C horizons of a Chernozem, Luvisol and a Solonetz. Observations and chemical determinations were based on scanning electron microscopy and energy dispersive X-ray analysis of fine sand separates. Features indicative of glacial and eolian transport, physical weathering by low energy subaqueous impact, and chemical dissolution and silica precipitation dominated surface characteristics. Most surface morphological features were of an inherited origin since they were common to solum and parent material samples. Quartz dissolution features were not uniquely associated with solum samples and apparently not of pedogenic origin. Key words: Scanning electron microscopy, quartz, pedogenesis, surface morphology, weathering classification

scholarly journals Synthesis and characterization of novel 1,2,3-triazole-bridged oxime polyurethanes obtained from an isomannide derivative

2021 ◽  
Vol 40 (1) ◽  
pp. 67
Author(s):  
Fatih Bayrak ◽  
Ayhan Oral ◽  
Kadir Ay
Keyword(s):  
Electron Microscopy ◽  
Surface Characteristics ◽  
Molecular Structures ◽  
Hexamethylene Diisocyanate ◽  
Synthesis And Characterization ◽  
1H And 13C Nmr ◽  
Molecular Weights ◽  
Molar Ratios ◽  
Scanning Electron

Polyurethanes (PUs) are synthesized by the reaction of diisocyanates and diols and are widely used in furniture foams, thermal insulation, coatings, and adhesives. In this work, a 1,2,3-triazole-bridged dioxime (compound 6) as a diol source was synthesized from isomannide via tosylation, azidation, and cyclization-addition and used in the syntheses of new PUs. A new carbohydrate-based linear P-1 was synthesized by the reaction of 6 and 1,6-hexamethylene diisocyanate (1,6-HMDI). Besides, three new linear PUs (P-2, P-3, and P-4) were synthesized by the reaction of 6, isomannide compound (used in different molar ratios), and 1,6-HMDI. The thermal properties of the new PUs were determined by thermogravimetry (TG), their molecular structures were characterized by FTIR, 1H- and 13C-NMR, and the molecular weights of some polymers were determined by GPC/SEC. Additionally, the surface characteristics of the synthesized PUs were examined via scanning electron microscopy (SEM).

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