scholarly journals Synthesis of azo polymers by etheric derivatives polymerization of allyl bromide and studying their bandgap and determine some of their properties: اصطناع بوليميرات آزو ببلمرة مشتاقات إيتيرية لبروميد الآليل ودراسة فجوتها الطاقية وتعيين بعض خصائصها الفيزيائية

2021 ◽  
Vol 5 (4) ◽  
pp. 155-142
Author(s):  
Ghazi Mahmoud Hasso Jawish, Rushdi Madwar, Francois Kara Bet Ghazi Mahmoud Hasso Jawish, Rushdi Madwar, Francois Kara Bet
Keyword(s):  
Refractive Index ◽  
Thermal Properties ◽  
Azo Dyes ◽  
Kinematic Viscosity ◽  
Allyl Bromide ◽  
Bandgap Energy ◽  
Azo Polymers ◽  
Ft Ir ◽  
Derivatives Of

In this research, two ether derivatives of phenolic azo dyes were synthesized via Williamson's reaction according to the SN2 mechanism. The prepared compounds were radically polymerized using (AIBN) as an initiator and their structures were identified by FT-IR and 1H-NMR. Furthermore, thermal properties of these polymers was made by (DSC). Bandgap energy have been calculated to indicate the ability of these polymers as optical semiconductors, it was 2.8ev, 2.4ev for P(AO2) and P(AON1) respectively. Beside the determination of refractive index, kinematic viscosity, density, and degree of Turbidity.

A Method for Matching the Refractive Index and Kinematic Viscosity of a Blood Analog for Flow Visualization in Hydraulic Cardiovascular Models

2004 ◽  
Vol 126 (4) ◽  
pp. 529-535 ◽  
Author(s):  
T. T. Nguyen and ◽  
Y. Biadillah ◽  
R. Mongrain ◽  
J. Brunette, and ◽  
J.-C. Tardif ◽  
...  
Keyword(s):  
Refractive Index ◽  
Dynamic Viscosity ◽  
Kinematic Viscosity ◽  
Measurement Techniques ◽  
Experimental Tests ◽  
Simple Method ◽  
Cardiovascular Models ◽  
Miscible Liquids

In this work, we propose a simple method to simultaneously match the refractive index and kinematic viscosity of a circulating blood analog in hydraulic models for optical flow measurement techniques (PIV, PMFV, LDA, and LIF). The method is based on the determination of the volumetric proportions and temperature at which two transparent miscible liquids should be mixed to reproduce the targeted fluid characteristics. The temperature dependence models are a linear relation for the refractive index and an Arrhenius relation for the dynamic viscosity of each liquid. Then the dynamic viscosity of the mixture is represented with a Grunberg-Nissan model of type 1. Experimental tests for acrylic and blood viscosity were found to be in very good agreement with the targeted values (measured refractive index of 1.486 and kinematic viscosity of 3.454 milli-m2/s with targeted values of 1.47 and 3.300 milli-m2/s).

Rapid determination of diesel/biodiesel blend ratio using refractive index, density, and kinematic viscosity measurements

2021 ◽  
Author(s):  
Siti Norhafiza Mohd Khazaai ◽  
Prakash Bhuyar ◽  
Mohd Hasbi Ab. Rahim ◽  
Muhammad Hasnol Fazirin Mohd Alwi ◽  
Sih Yiting ◽  
...  
Keyword(s):  
Refractive Index ◽  
Kinematic Viscosity ◽  
Rapid Determination ◽  
Blend Ratio ◽  
Viscosity Measurements ◽  
Biodiesel Blend

Isomerization of Allyl Derivatives of Bisphenol A

2020 ◽  
Vol 869 ◽  
pp. 357-361
Author(s):  
Vladimir A. Lisovenko ◽  
Pavel A. Yudaev ◽  
Evgeniy M. Chistyakov
Keyword(s):  
Differential Scanning Calorimetry ◽  
Thermal Properties ◽  
Nmr Spectroscopy ◽  
Bisphenol A ◽  
1H Nmr ◽  
1H Nmr Spectroscopy ◽  
Claisen Rearrangement ◽  
Allyl Bromide ◽  
Scanning Calorimetry ◽  
Derivatives Of

4,4'-diallyloxy-2,2-diphenylpropane, based on bisphenol A and allyl bromide wassynthesized. The thermal properties of the obtained products were studied using thermogravimetricanalysis and differential scanning calorimetry. The process of thermal isomerization of allyl groupsin 4,4'-diallyloxy-2,2-diphenylpropane, which is a Claisen rearrangement, was discovered. Allcompounds were characterized by 1H NMR spectroscopy.

scholarly journals Synthesis, anti-inflammatory, molecular docking and ADME studies of new derivatives of ketoprofen as cyclooxygenases inhibitor

2019 ◽  
pp. 125-139
Keyword(s):  
Molecular Docking ◽  
Side Effects ◽  
Nmr Spectra ◽  
Ft Ir ◽  
Inflammatory Drugs ◽  
Cox 2 ◽  
Anti Inflammatory ◽  
Derivatives Of

The synthesis of new selective COX-2 enzyme is an approach for obtaining potent, anti-inflammatory drugs that have fewer side effects. Ketoprofen has a very low selectivity toward COX-2 enzyme and has a serious GIT side effects because it induces gastric ulcer. A new series of 4-thiazolidinones bearing ketoprofen moiety was designed, synthesized, and then evaluated as a new inhibitor of cyclooxygenase-2 (COX-2). Characterization and identification of the synthesized compounds were established by determination of 1H-NMR spectra,13C-NMR spectra, FT-IR spectroscopy, and physical properties. These newly synthesized compounds have been evaluated in vivo for their anti-inflammatory efficiency and in silico selectivity toward COX-2 throughout molecular docking by using GOLD.suite.v.5.6.2. All the tested. compounds via molecular. docking showed significant. activities when compared. With ketoprofen and diclofenac as references drugs, the results were consistent with the study of in in vivo acute. anti-inflammatory activity. Also, ADME studies had been accomplished in order to predict the absorption sites, bioavailability, topological polar surface Area (TPSA), and also drug-likeness. The ADME results reported that. All the synthesized. compounds can be absorbed by the GIT.

scholarly journals Bio-Gasoline and Bio-Kerosene Production by Fractional Distillation of Pyrolysis Bio-Oil Açaí Seeds

2021 ◽  
Author(s):  
Douglas Alberto Rocha de Castro ◽  
Haroldo Jorge da Silva Ribeiro ◽  
Lauro Henrique Hamoy Guerreiro ◽  
Lucas Pinto Bernar ◽  
Sami Jonatan S. J. Bremer ◽  
...  
Keyword(s):  
Physical Chemistry ◽  
Refractive Index ◽  
Kinematic Viscosity ◽  
Acid Value ◽  
Fractional Distillation ◽  
Euterpe Oleracea ◽  
Bio Oil ◽  
Refractive Index Increase ◽  
Ft Ir ◽  
Euterpe Oleracea Mart

The bio-oil obtained by pyrolysis of Açaí (Euterpe oleracea Mart.) seeds at 450 ºC, 1.0 atmosphere, in technical scale, submitted to fractional distillation to produce biofuels-like fractions. The distillation of bio-oil carried out in a laboratory distillation column (Vigreux) of 30 cm. The physical-chemistry properties (density, kinematic viscosity, acid value and refractive index) determined by official methods. The chemical functions present in distillation fractions determined by FT-IR and the chemical composition by GC-MS. The distillation of bio-oil yielded gasoline, light kerosene, and kerosene-like fuel fractions of 16.16, 19.56, and 41.89% (wt.), respectively. All the physical-chemistry properties (density, kinematic viscosity, acid value and refractive index) increase with boiling temperature. The gasoline-like fraction is composed by 64.0% (area.) hydrocarbons and 36.0% (area.) oxygenates, while light kerosene-like fraction by 66.67% (area.) hydrocarbons and 33.33% (area.) oxygenates, and kerosene-like fraction by 19.87% (area.) hydrocarbons and 81.13% (area.) oxygenates.

scholarly journals Synthesis, spectroscopic, and thermal studies of azo compounds from luminol and procaine with acetylacetone and their complexes

2021 ◽  
Vol 2063 (1) ◽  
pp. 012016
Author(s):  
Noor Al AlBaheley ◽  
T A Fahad ◽  
Asaad A Ali
Keyword(s):  
Thermal Decomposition ◽  
Thermal Properties ◽  
Thermogravimetric Analysis ◽  
Elemental Analysis ◽  
Azo Dyes ◽  
Thermal Studies ◽  
Bidentate Ligand ◽  
Azo Compounds ◽  
Molar Ratios ◽  
Ft Ir

Abstract This The study entails the synthesis of two newly synthesized azo dyes luminol and procaine with acetylacetone (N1 and N2 correspondingly). Elementalanalysis, 1HNMR, T.G.A, and FTIR. have all been used to characterize dyes. These new dyes were reacted with Cpper and Nikel ionin 1:2 molar ratios to form of complexes of metals (II) with a general stoichiometry; CuL2, and NiL2 in complexes., FT IR, as well as the corresponding metal (II) complex, were used to characterize them. The dye acts as a bidentate ligand, according to elemental analysis and spectral results. The thermal properties of these compounds were investigated using thermogravimetric analysis (TGA). Thermal decomposition of these compounds is a process that occurs in stages.,

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