scholarly journals Physico-Chemical Properties of Binary Mixture of 2,3-Dichloroaniline and Carbon Tetrachloride at 300 K

2021 ◽  
Vol 33 (10) ◽  
pp. 2386-2392
Author(s):  
Mahendra Kumar ◽  
Chandreshvar Prasad Yadav ◽  
Dharmendra Kumar Pandey ◽  
Dhananjay Singh
Keyword(s):  
Carbon Tetrachloride ◽  
Binary Mixture ◽  
Ultrasonic Velocity ◽  
Mole Fraction ◽  
Thermal Relaxation ◽  
Chemical Properties ◽  
Physical Parameters ◽  
Estimated Parameters ◽  
Physico Chemical ◽  
Gibb’S Free Energy

The physico-chemical properties of binary mixture of 2,3-dichloroaniline (2,3-DCA) and carbon tetrachloride (CCl4) have been studied in the present work by the measurement of density, viscosity, ultrasonic velocity and estimation of thermo-physical parameters at 300 K. The density, compressibility, free length, relative association and free volume were found to increase while viscosity, ultrasonic velocity, acoustic impedance and internal pressure were received to decay with an increase in mole fraction of solvent in the binary mixture. The thermal relaxation time and Gibb’s free energy were found to decay with a slow rate up to 50% mole fraction of the solvent, after that these quantities decay very fast in chosen binary mixture. The ultrasonic absorption was also found to increase slowly up to 50% mole fraction of solvent and after that a fast decay was observed in the present binary mixture. The molecular interaction, structural ordering, stability and related features of the prepared binary mixture were also analyzed based on measured and estimated parameters.

scholarly journals MICROCLIMATIC CONDITIONS AND PHYSICO-CHEMICAL PROPERTIES OF SOIL IN INTENSIVE ECOLOGICAL VEGETABLE CROP ROTATION IN HIGH TUNNEL

2020 ◽  
Vol 19 (3) ◽  
pp. 73-81
Author(s):  
Piotr Siwek ◽  
Iwona Domagała-Świątkiewicz ◽  
Andrzej Kalisz ◽  
Piotr Bucki
Keyword(s):  
Solar Radiation ◽  
Crop Rotation ◽  
Chemical Properties ◽  
Stability Index ◽  
Soil Bulk Density ◽  
Physical Parameters ◽  
High Tunnel ◽  
Physico Chemical ◽  
Butterhead Lettuce ◽  
The University

In 2014–2015 at the experimental station of the University of Agriculture in Kraków, situated in Mydlniki near Kraków, Poland, experiments with intensive crop rotation in a high tunnel were conducted. The objectives concerned microclimatic zones in the tunnel and the yield and quality of butterhead lettuce (spring), cucumber (summer), and butterhead lettuce (autumn). Besides the properties of the soil in the high tunnel, a crucial role was played by microclimatic factors. The measurements showed variations in solar radiation, temperature and air humidity depending on the zone in the tunnel and the weather. Higher temperature in the centre of the tunnel was conducive to obtaining greater yields of spring lettuce and cucumber. In the spring and summer periods, the amounts of dry matter and total sugars in the edible parts of the cultivated vegetables were higher in the eastern and central zones of the tunnel. In the autumn, with less solar radiation, the amount of sugars in lettuce leaves was greater in the western zone. There was observable influence of the location in the tunnel from which samples were taken for analyses (zonal effect) on some physical parameters of the soil (bulk density, water capacity, and water-stability index).

scholarly journals Nutritional, Physico-Chemical and Mechanical Characterization of Vegetable Fibers to Develop Fiber-Based Gel Foods

Foods ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 1017
Author(s):  
Ana Teresa Noguerol ◽  
Marta Igual ◽  
M. Jesús Pagán-Moreno
Keyword(s):  
Ph Value ◽  
Chemical Properties ◽  
Absorption Capacity ◽  
Gelling Agent ◽  
Water Retention Capacity ◽  
Physical Parameters ◽  
Hydration Properties ◽  
Retention Capacity ◽  
Vegetable Fibers ◽  
Physico Chemical

The aim of this research was to evaluate the nutritional and physico-chemical properties of six different vegetable fibers and explore the possibility of using them as a thickener or gelling agent in food. To determine the technological, nutritional and physical parameters, the following analyses were carried out: water-holding capacity, water retention capacity, swelling, fat absorption capacity, solubility, particle size, moisture, hygroscopicity, pH, water activity, bulk density, porosity, antioxidant activity, phenolic compounds and mineral content. Gels were prepared at concentrations from 4% to 7% at 5 °C and analyzed at 25 °C before and after treatment at 65 °C for 20 min. A back extrusion test, texture profile analysis and rheology were performed and the pH value, water content and color were analyzed. As a result, all the samples generally showed significant differences in all the tested parameters. Hydration properties were different in all the tested samples, but the high values found for chia flour and citrus fiber are highlighted in functional terms. Moreover, chia flour was a source of minerals with high Fe, Mn and Cu contents. In gels, significant differences were found in the textural and rheological properties among the samples, and also due to the heat treatment used (65 °C, 20 min). As a result, chia flour, citrus, potato and pea fibers showed more appropriate characteristics for thickening. Moreover, potato fiber at high concentrations and both combinations of fibers (pea, cane sugar and bamboo fiber and bamboo, psyllium and citric fiber) were more suitable for gelling agents to be used in food products.

scholarly journals Study of Acoustical and Physico-chemical Properties for the Ternary Mixture of (Toluene+ Chlorobenzene + Cyclohexane) at 298.15 K Temperature

2021 ◽  
Vol 17 (2) ◽  
pp. 9-15
Author(s):  
SONU DWIVEDI ◽  
Keyword(s):  
Ultrasonic Velocity ◽  
Acoustic Impedance ◽  
Ternary Mixture ◽  
Chemical Properties ◽  
Isentropic Compressibility ◽  
Excess Properties ◽  
Acoustical Parameters ◽  
Free Length ◽  
Physico Chemical ◽  
Kister Equation

Ultrasonic velocity (U), density (ρ) for the ternary mixture of (Toluene + Chlorobenzene + Cyclohexane) in the various range of composition has been carried out at 298.15K. The observed data have been utilized to calculate various acoustical parameters like Isentropic compressibility (KS), Intermolecular free length (Lf) and acoustic impedance (Z). The various excess properties like excess ultrasonic velocity(UE ), excess acoustic impedance (ZE ), excess Isentropic compressibility (KS E ) and excess Inter molecular free length (Lf E ) have been calculated and using standard relations to the Redlich-Kister equation. The trend of acoustical and physicochemical parameters confirm the dynamics of molecules at temperature and the magnitude of intermolecular interactions among the constituents of the mixture always reflects the nature of substance. The variations in sign and values of these parameters are help us to know the interaction between component molecules and structural arrangement of the liquid mixture.

Some Physico-Chemical Properties of Carbon Blacks

1941 ◽  
Vol 14 (4) ◽  
pp. 934-937
Author(s):  
T. Patryn ◽  
S. Pilat
Keyword(s):  
Electrical Conductivity ◽  
Carbon Tetrachloride ◽  
Spontaneous Combustion ◽  
Chemical Properties ◽  
Carbon Blacks ◽  
Physico Chemical ◽  
Different Types

Abstract A study was made of the adsorption of carbon tetrachloride vapor by various types of blacks, and data were obtained on the heats of wetting of blacks by carbon tetrachloride. A study was made of the fat coefficients and the points of spontaneous combustion of various types of blacks. It was found that active blacks can be distinguished from inactive blacks by their powers of adsorption of carbon tetrachloride and also by their heats of wetting. There is no way of telling by its fat coefficient whether a black is of value in rubber. The point of spontaneous combustion gives an approximate idea of the origin and formation of a black. Data on electrical conductivity have thus far not provided any basis for classifying different types of blacks.

scholarly journals Influence of the slight adjustment of oxides on the structural and physico-chemical properties of thin film transistor-liquid crystal display substrate glass

2020 ◽  
Vol 7 (1) ◽  
pp. 191425 ◽  
Author(s):  
Jiedong Cui ◽  
Xin Cao ◽  
Lifen Shi ◽  
Zhaojin Zhong ◽  
Pingping Wang ◽  
...  
Keyword(s):  
Thin Film ◽  
Liquid Crystal ◽  
Mole Fraction ◽  
Short Range ◽  
Glass Melting ◽  
Liquid Crystal Display ◽  
Thin Film Transistor ◽  
Chemical Properties ◽  
Glass Network ◽  
Physico Chemical

By the slight adjustment of oxides constituting thin film transistor-liquid crystal display (TFT-LCD) substrate glass, including equal mole fraction substitution of Al 2 O 3 , GeO 2 , B 2 O 3 , P 2 O 5 and ZrO 2 for SiO 2 , as well as the substitution of CaO for SrO with the total contents unchanged, the structural and physico-chemical properties of the glass was investigated by Raman spectroscopy and other measurements. The results showed that the short-range disorder brought by the substitution of GeO 2 , B 2 O 3 and P 2 O 5 for SiO 2 could weaken the stability and compactness of the glass network, and the physico-chemical properties deteriorated, while the process of glass melting would become easier accordingly. The short-range disorder by the substitution of ZrO 2 for SiO 2 with 1% mole fraction showed a little difference with other samples. Finally, the substitution of modified cations, such as CaO and SrO, showed a smaller variation compared with the substitution of network formers. On the condition of 1% mole fraction substitution of oxides investigated, the variation of samples showed a reasonable change and the performance was basically all satisfied for the use of TFT-LCD substrate.

scholarly journals Physical parameters and physico-chemical properties of two wild beans (Phaseolus lunatus) consumed in Côte d'Ivoire

2019 ◽  
Vol 3 (2) ◽  
pp. 007-016
Author(s):  
Elvis Gbocho Serge Ekissi ◽  
Jocelyn Constant Yapi ◽  
Martin Tanoh Kouadio ◽  
Albert Abidie Gouledji ◽  
Patrice Lucien Kouame
Keyword(s):  
Cote D'ivoire ◽  
Côte D’Ivoire ◽  
Chemical Properties ◽  
Phaseolus Lunatus ◽  
Physical Parameters ◽  
Cote D’Ivoire ◽  
Côte D'ivoire ◽  
Physico Chemical ◽  
Wild Beans

scholarly journals Effect of the addition of synthetic fuel on the selected physico-chemical properties of the fuel for the diesel engines

2017 ◽  
Vol 171 (4) ◽  
pp. 193-195
Author(s):  
Anna SKARBEK-ŻABKIN
Keyword(s):  
Laboratory Tests ◽  
Effective Means ◽  
Cetane Number ◽  
Chemical Properties ◽  
Average Diameter ◽  
Fuel Mixture ◽  
Diesel Oil ◽  
Physical Parameters ◽  
Synthetic Fuel ◽  
Physico Chemical

Plastics present a major threat to todays society and environment. Though mankind has awoken to this threat and responded with developments in creating degradable bio plastics, there is still no conclusive effort done to repair the damage already caused. In this regard, the catalytic depolymerization studied here presents an efficient, clean and very effective means of removing the debris that we have left behind over the last several decades. By converting plastics to fuel, we solve two issues, one of the large plastic seas, and the other of the fuel shortage. This dual benefit, though will exist only as long as the waste plastics last, but will surely provide a strong platform for us to build on a sustainable, clean and green future. The paper presents results of density, viscosity, cetane number, ignition temperature of 100% synthetic fuel and this fuels mixture with the diesel oil. The quality of the fuel-air mixture formation is best characterized by the SMD parameter – Sauters average diameter of spray drops, and its value in analytical studies depends on the physical parameters of the fuel (density, viscosity, surface tension). The results of laboratory tests will be developed in terms of the use of the measured parameters of a synthetic fuel mixture to calculate SMD values and to correct analytical equations taking into account the actual SMD values measured by laser diffraction laboratory tests.

scholarly journals Physico-chemical Properties of the Pseudo-binary Mixture Gasoline + 1 - Butanol

2016 ◽  
Vol 95 ◽  
pp. 330-336 ◽  
Author(s):  
Irina Nita ◽  
Olga Iulian ◽  
Elis Geacai ◽  
Sibel Osman
Keyword(s):  
Binary Mixture ◽  
Chemical Properties ◽  
Physico Chemical

Decoration of specific sites on freeze-fractured membranes

1978 ◽  
Vol 36 (2) ◽  
pp. 140-141
Author(s):  
H. Gross ◽  
H. Moor
Keyword(s):  
Pure Water ◽  
Freeze Fracture ◽  
Chemical Properties ◽  
Surface Forces ◽  
Sulfate Pentahydrate ◽  
Copper Sulfate Pentahydrate ◽  
Physico Chemical ◽  
Water Of Hydration ◽  
Small Container ◽  
Binding Forces

Fracturing under ultrahigh vacuum (UHV, p ≤ 10-9 Torr) produces membrane fracture faces devoid of contamination. Such clean surfaces are a prerequisite foe studies of interactions between condensing molecules is possible and surface forces are unequally distributed, the condensate will accumulate at places with high binding forces; crystallites will arise which may be useful a probes for surface sites with specific physico-chemical properties. Specific “decoration” with crystallites can be achieved nby exposing membrane fracture faces to water vopour. A device was developed which enables the production of pure water vapour and the controlled variation of its partial pressure in an UHV freeze-fracture apparatus (Fig.1a). Under vaccum (≤ 10-3 Torr), small container filled with copper-sulfate-pentahydrate is heated with a heating coil, with the temperature controlled by means of a thermocouple. The water of hydration thereby released enters a storage vessel.

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