scholarly journals БЕЗКОНТАКТНИЙ МЕТОД ТРИПАРАМЕТРОВОГО ВИМІРЮВАЛЬНОГО КОНТРОЛЮ ФІЗИКО-ХІМІЧНИХ ХАРАКТЕРИСТИК ЗРАЗКА ФЕРОМАГНІТНОЇ РІДИНИ

2018 ◽  
Vol 124 (4) ◽  
pp. 77-84
Author(s):  
В. В. Себко ◽  
В. Г. Здоренко
Keyword(s):  
Electrical Conductivity ◽  
Magnetic Permeability ◽  
Electromagnetic Method ◽  
Specific Electrical Conductivity ◽  
Parameter Method ◽  
Chemical Characteristics ◽  
Parameter Control ◽  
Relative Magnetic Permeability ◽  
Physical And Chemical ◽  
Measuring Control

The aim of the article is to investigate the method of three-parameter control of a sample of a ferromagnetic liquid, the realization of which is carried out on the basis of a noncontact transformer electromagnetic converter (TEC) with samples of ferromagnetic liquids in a longitudinal magnetic field.We used a technique for studying samples of a ferromagnetic liquid for the realization of a three-parameter electromagnetic method for measuring the physical and chemical characteristics of ferromagnetic liquids based on thermal TEC. The three-parameter method of measuring control of the relative magnetic permeability mr, the specific electrical conductivity σ, and the temperature t of a sample of a ferromagnetic liquid, which is monitored on the basis of measurements and analysis of signals of a thermal contactless three-parameter TEC, is studied. The theoretical principles of the operation of a contactless thermal TEC with a sample of a ferromagnetic liquid are based on the realization of a three-parameter method for measuring the monitoring of magnetic, electrical, and temperature parameters.

scholarly journals A Method For Determination Of Specific Electrical Resistance Of Steel And Nano-Coating Sputtered On It

2015 ◽  
Vol 2 ◽  
pp. 118 ◽  
Author(s):  
Andris Martinovs ◽  
Josef Timmerberg ◽  
Konstantins Savkovs ◽  
Aleksandrs Urbahs ◽  
Paul Beckmann
Keyword(s):  
Electrical Conductivity ◽  
Magnetic Permeability ◽  
Electrical Resistance ◽  
Skin Effect ◽  
Specific Electrical Resistance ◽  
Specific Electrical Conductivity ◽  
Relative Magnetic Permeability ◽  
Nano Coating ◽  
Cylindrical Steel

The paper describes methods developed to determine specific electrical conductivity and relative magnetic permeability of cylindrical steel items and nano-coatings deposited on them by sputtering. Research enables development of a new method for determination of thickness of vacuum deposited nano- coating that is based on application of skin effect.

scholarly journals Potential of Pinus elliottii Engelm. needles as substrate conditioner for the production of “Fepagro C37 reck”Citrus rootstocks”

2019 ◽  
Vol 41 (3) ◽  
Author(s):  
Henrique Ceccagno ◽  
Vitor Dutra de Souza ◽  
Gilmar Schäfer ◽  
Eduarda Demari Avrella ◽  
Claudimar Sidnei Fior
Keyword(s):  
Electrical Conductivity ◽  
Water Retention ◽  
Pinus Elliottii ◽  
Chemical Characteristics ◽  
Porous Space ◽  
In Situ Decomposition ◽  
Substrate Mixtures ◽  
Physical And Chemical ◽  
Reduced Water

Abstract The production of citrus seedlings in protected environment requires a large amount of substrate, which must have adequate physical and chemical characteristics. The use of acidic conditioners, such as Pinus needles mixed with alkaline substrates, allows the cultivation of seedlings with better quality. The objective of this work was to evaluate the development of the “Fepagro C37 Reck” rootstock grown in different alkaline commercial substrate mixtures (Humosolo ES®) with Pinus elliottii needles. The experiment was carried out by testing alkaline substrate mixed with 5-month old of decomposition Pinus needles in situ decomposition and two granulometry sizes, 3.5 and 8.0 mm. The mixtures were performed in proportions between the needles with the Humosolo, (v / v) 0%; 25%; 50%; 75% and 100%. Expanded cellular polystyrene trays were used to accommodate the mixtures and seeding of the rootstock. Physical and chemical evaluateons of the mixtures were carried out, as well as the development of the seedlings. The use of Pinus needles acidified the substrate Humosolo ES®, reduced its electrical conductivity and increased the percentage of porous space of the mixtures and reduced water retention. The treatments containing 25 and 50% of the Pinus needles mixture, regardless of the granulometry, provide greater development of rootstock plants “Fepagro C37 Reck”.

Effects of Material Properties for Non-Equilibrium Conditions in Induction Heating Process

2013 ◽  
Vol 664 ◽  
pp. 496-503
Author(s):  
Noureddine Barka ◽  
Abderrazak El Ouafi ◽  
Philippe Bocher ◽  
Jean Brousseau
Keyword(s):  
Thermal Conductivity ◽  
Electrical Conductivity ◽  
Induction Heating ◽  
Thermodynamic Equilibrium ◽  
Magnetic Permeability ◽  
Material Properties ◽  
Heating Process ◽  
Hardness Profile ◽  
Equilibrium Conditions ◽  
Relative Magnetic Permeability

As the induction heating is very fast, it is reasonable to assume that the material properties are different from those measured under thermodynamic equilibrium conditions. For this reason, this study attempts to measure the effect of material properties variations on the surface temperature using the 2D axisymmetric model. The results show that the relative magnetic permeability is the property that most significantly influences surface temperatures and the hardness profile. The effects of specific heat and electrical conductivity are rather low, while the thermal conductivity has a negligible effect on the model developed. Moreover, the variation ofaustenitizingtemperature of margins has limited effects on the developed model. Therefore, the use of material properties at thermodynamic equilibrium was sufficient to establish models able to predict trends.

scholarly journals Quality of Heliconia psittacorum seedlings grown on different substrates

2016 ◽  
Vol 21 (3) ◽  
pp. 387
Author(s):  
Raimundo Luiz Laurinho dos Santos ◽  
José Antonio Saraiva Grossi ◽  
Rogério Gomes Pêgo ◽  
José Geraldo Barbosa
Keyword(s):  
Electrical Conductivity ◽  
Chemical Characteristics ◽  
Physical Analysis ◽  
High Electrical Conductivity ◽  
Coconut Husk ◽  
The Matrix ◽  
Main Component ◽  
Physical And Chemical ◽  
All Treatment

The production of good seedlings depends on the quality of the matrix and propagation techniques used. In choosing a substrate should be particularly observed physical and chemical characteristics. The objective of this study was to assess the development and vigor of heliconia seedlings from Heliconia psittacorum species, grown on different substrates and mixtures. The materials that form the treatments were: burnt rice husk (RHB), vermiculite (VC), sugarcane waste burnt (SWB), subsoil (S), chicken bedding (CB), cattle manure (CM), earthworm humus (EH), coconut husk powder (CSP) and Horticultural Plantmax (HP). The treatments chosen were: 1( ⅔ CM + ⅓ CSP), 2( ⅔CM + ⅓RHB), 3( ⅔CB + ⅓ SWB), 4(CSP), 5(½VC+ ½SWB), 6(⅔ S + ⅓ CB), 7(⅓CM + ⅔SWB), 8(⅔ CM + ⅓SWB), 9(⅔CB + ⅓RHB), 10(⅓CM + ⅔RHB), 11(⅓CB + ⅔SWB), 12(⅔CB + ⅓CSP), 13(⅔EH + ⅓CSP), 14(⅔EH + ⅓SWB), 15(⅓CB + ⅔RHB), 16(⅓EH + ⅔SWB), 17(⅔EH + ⅓RHB), 18( ½VC + ½RHB), 19(S), 20(⅔ S + ⅓ CM), 21(⅔ S + ⅓ EH), 22(EH), 23(HP), 24(⅓EH + ⅔RHB). Samples of all treatment compositions were taken and carried out chemical and physical analysis. A set of ten treatments (1, 2, 5, 7, 8, 10, 14, 16, 20 and 22) basically consisting of CM EH, RHB, CSP and SWB produced the best seedlings and treatment with CB as a main component or not produced the worst seedlings due to high electrical conductivity

VI.—The Significance of Maximum Specific Electrical Conductivity in Chemistry

1912 ◽  
Vol 48 (1) ◽  
pp. 117-136
Author(s):  
John Gibson
Keyword(s):  
Electrical Conductivity ◽  
Electric Conductivity ◽  
General Characteristic ◽  
Specific Electrical Conductivity ◽  
Physical Change ◽  
Sharp Line ◽  
Chemical Changes ◽  
Physical And Chemical ◽  
Made In ◽  
Photochemical Action

The first step made in this investigation was the recognition of increased specific electrical conductivity as a general characteristic of photochemical action. It was argued that if there be any common characteristic in photochemical changes it must be found in the simplest as well as in the more familiar and more complex reactions which are characteristic of the metabolism of plants.No chemically simpler case suggested itself than the increase in electric conductivity of crystalline selenium under the influence of light. This change might indeed be held almost to lie outside the range of chemistry proper, and to belong to the class of change often spoken of as merely physical change. But no sharp line can be drawn between physical and chemical changes, and the clue proved most useful.

scholarly journals Physical and Chemical Characteristics of a Commercial Potting Substrate Amended with Vermicompost Produced from Two Different Manure Sources

2007 ◽  
Vol 17 (3) ◽  
pp. 336-340 ◽  
Author(s):  
Gary R. Bachman ◽  
James D. Metzger
Keyword(s):  
Electrical Conductivity ◽  
Beef Cattle ◽  
Nitrate Nitrogen ◽  
Chemical Characteristics ◽  
Air Volume ◽  
Alternative Materials ◽  
Calcium Magnesium ◽  
Physical And Chemical ◽  
Water Holding ◽  
Nitrogen Phosphorus

Interest in using alternative materials for potting substrate is increasing in response to availability and rising costs of peat and other conventional materials. Vermicompost (VC) is one such material. It is important to understand physical and chemical changes in potting substrate when amended with VC produced from different waste sources, pig (PVC) and beef cattle (BVC) manure in this study. Distribution of particles greater than 2 mm decreased, particles 0.5 to 1 mm increased, and particles less than 0.5 mm remained unchanged as PVC and BVC amendment increased. Dry bulk density and water-holding capacity increased with increasing PVC and BVC amendment. Porosity and air volume were inversely related to VC amendment, decreasing with increasing VC amendment. Saturated substrate extract sampling revealed nitrate nitrogen, phosphorus, calcium, magnesium, zinc, copper, iron content as well as electrical conductivity increased with increasing PVC and BVC amendment.

Characterization of defects in tabular silver halide grains

1990 ◽  
Vol 48 (4) ◽  
pp. 1046-1047
Author(s):  
C. Goessens ◽  
D. Schryvers ◽  
J. Van Landuyt ◽  
A. Verbeeck ◽  
R. De Keyzer
Keyword(s):  
Radiation Damage ◽  
Silver Halide ◽  
Chemical Characteristics ◽  
X Ray ◽  
Free Region ◽  
Central Defect ◽  
Crystallographic Defects ◽  
Physical And Chemical ◽  
Two Sides

Silver halide grains (AgX, X=Cl,Br,I) are commonly recognized as important entities in photographic applications. Depending on the preparation specifications one can grow cubic, octahedral, tabular a.o. morphologies, each with its own physical and chemical characteristics. In the present study crystallographic defects introduced by the mixing of 5-20% iodide in a growing AgBr tabular grain are investigated. X-ray diffractometry reveals the existence of a homogeneous Ag(Br1-xIx) region, expected to be formed around the AgBr kernel. In fig. 1 a two-beam BF image, taken at T≈100 K to diminish radiation damage, of a triangular tabular grain is presented, clearly showing defect contrast fringes along four of the six directions; the remaining two sides show similar contrast under relevant diffraction conditions. The width of the central defect free region corresponds with the pure AgBr kernel grown before the mixing with I. The thickness of a given grain lies between 0.15 and 0.3 μm: as indicated in fig. 2 triangular (resp. hexagonal) grains exhibit an uneven (resp. even) number of twin interfaces (i.e., between + and - twin variants) parallel with the (111) surfaces. The thickness of the grains and the existence of the twin variants was confirmed from CTEM images of perpendicular cuts.

Sign in / Sign up

Export Citation Format

Share Document