scholarly journals Development of processing technology and mathematical model of modification of magnesite raw material

2002 ◽  
Vol 50 ◽  
Author(s):  
MICHAL LESKO ◽  
TOMÁS BAKALÁR
Keyword(s):  
Mathematical Model ◽  
Mineral Processing ◽  
Processing Technology ◽  
Raw Material ◽  
Chemical Methods ◽  
Processing Methods ◽  
Physical Chemical ◽  
Mineralogical Properties

The application of physical and physical-chemical methods of magnesite processing related to the physical, chemical and mineralogical properties of particular magnesite types are presented in this paper. The best product qualities, achieved depending on the degree of liberalization of components contained in the magnesite, are shown. Possibilities and advantages of modelling of mineral processing methods applied to magnesite are also exemplified.

Physical-Chemical Studies and Evaluation of the Suitability of Chernoyarskoe Deposit’s Diatomite for the Synthesis of Foam Glass

2020 ◽  
Vol 299 ◽  
pp. 188-193
Author(s):  
Elena A. Yatsenko ◽  
V.A. Smoliy ◽  
A.A. Chumakov
Keyword(s):  
Thermal Analysis ◽  
Foam Glass ◽  
Microscopic Analysis ◽  
Mineralogical Composition ◽  
Raw Material ◽  
Polymorphic Transformations ◽  
Chemical Methods ◽  
Physical Chemical ◽  
Chemical Studies ◽  
Complex Thermal Analysis

The macro- and microstructure is investigated by microscopic analysis methods. The elemental, granulo-metric and mineralogical composition of diatomite of the Chernoyarskoe deposit is determined. As a result of complex thermal analysis, using a differential scanning calorimeter, intervals of continuous dehydration of diatomite were studied, as well as polymorphic transformations of quartz and other minerals. Physical-chemical methods of research have discovered that diatomite of the Chernoyarskoe deposit contains amorphous silica, quartzite, clay impurities, opal and minor amounts of calcite, mica, zeolite, and so this diatomite is a promising raw material for the synthesis of foam glass.

Transmission Electron Microscopy of Protein Macromolecules

1971 ◽  
Vol 29 ◽  
pp. 424-425
Author(s):  
Henry S. Slayter
Keyword(s):  
Biological Systems ◽  
Metal Vapor ◽  
Resolving Power ◽  
Electron Microscopic ◽  
Chemical Methods ◽  
Molecular Weights ◽  
The Past ◽  
Physical Chemical ◽  
Transmission Electron

Electron microscopic methods have been applied increasingly during the past fifteen years, to problems in structural molecular biology. Used in conjunction with physical chemical methods and/or Fourier methods of analysis, they constitute powerful tools for determining sizes, shapes and modes of aggregation of biopolymers with molecular weights greater than 50, 000. However, the application of the e.m. to the determination of very fine structure approaching the limit of instrumental resolving power in biological systems has not been productive, due to various difficulties such as the destructive effects of dehydration, damage to the specimen by the electron beam, and lack of adequate and specific contrast. One of the most satisfactory methods for contrasting individual macromolecules involves the deposition of heavy metal vapor upon the specimen. We have investigated this process, and present here what we believe to be the more important considerations for optimizing it. Results of the application of these methods to several biological systems including muscle proteins, fibrinogen, ribosomes and chromatin will be discussed.

scholarly journals A Critical Review on Mathematical Descriptions to Study Flux Processes and Environmental-Related Interactions of Mangroves

2021 ◽  
Vol 13 (12) ◽  
pp. 6970
Author(s):  
Jefferson Brooks ◽  
Miguel Chen Chen Austin ◽  
Dafni Mora ◽  
Nathalia Tejedor-Flores
Keyword(s):  
Systematic Review ◽  
Mathematical Model ◽  
Global Warming ◽  
Process Modeling ◽  
Critical Review ◽  
Systematic Search ◽  
Raw Material ◽  
Mangrove Forests ◽  
Recent Information ◽  
Modeling Studies

Trees are resources that provide multiple benefits, such as the conservation of fauna, both terrestrial and marine, a source of food and raw material, and offering protection in storms, which makes it practical to understand their behavior against different phenomena. Such understanding may be possible through process modeling. Studies confirm that mangrove forests can store more carbon than other forests, influencing the fight against global warming. Thus, a critical and systematic review was carried out regarding studies focusing on mangroves to collect information on the models that have been applied and the most influential variables highlighted by other authors. Applying a systematic search for the most relevant topics related to mangroves (basic as well as recent information), it is possible to group models and methods carried out by other authors to respond to certain behaviors presented by mangroves. Moreover, possible structuring of a mathematical model applied to a species of interest thanks to the analyzed references could provide justified information to the authorities on the importance of these forests and the benefits of their preservation and regeneration-recovery.

Overview of Physical-Chemical Methods for Determining Aminoglycoside Antibiotics in Tissues and Fluids of Food-Producing Animals

1985 ◽  
Vol 68 (5) ◽  
pp. 1007-1013
Author(s):  
Badar Shaikh ◽  
Edward H Allen
Keyword(s):  
Liquid Chromatography ◽  
Aminoglycoside Antibiotics ◽  
Biological Matrices ◽  
Chemical Methods ◽  
Physical Chemical ◽  
Recent Developments

Abstract A survey of literature is presented dealing with physical-chemical methods for the detection and quantitation of aminoglycoside antibiotics (gentamicin, streptomycin, dihydrostreptomycin, and neomycin) that are used in food-producing animals. Recent developments in cleanup and determinative procedures, particularly liquid chromatography, for these compounds in fluids and tissues are emphasized. Little research has been done on residues in tissues compared with other biological matrices. This review also covers the chemistry, general characteristics, tolerances, and withdrawal times for the approved uses of these antibiotics in animals that are used for food.

Study on the Recovery of Sulfur from Multi-Metals Tailings

2013 ◽  
Vol 734-737 ◽  
pp. 1110-1113
Author(s):  
Xiang Wen Lv ◽  
Xiong Tong ◽  
Xian Xie ◽  
Qing Hua Zhou ◽  
Yong Cheng Zhou ◽  
...  
Keyword(s):  
Experimental Research ◽  
Copper Sulfate ◽  
Mineral Processing ◽  
Sulfide Mineral ◽  
Economic Benefits ◽  
Processing Technology ◽  
Environmental Benefit ◽  
New Type ◽  
Concentrate Grade ◽  
Sulfur Containing

A beneficiation experimental research is conducted on sulfur-containing 18.17% multi-metals tailings. On the basis of the traditional mineral processing technology, it introduces X-51, a new type sulfide mineral activator, to instead of copper sulfate. Eventually, the sulfur concentrate grade is 47.51% with the recovery of 92.11%. The effectively recovery of the sulfur is creating good economic benefits and environmental benefit.

scholarly journals Effect of Inulin on the Physical, Chemical and Sensory Quality Attributes of Polish Chicken Burgers

2012 ◽  
Vol 1 (1) ◽  
pp. 169 ◽  
Author(s):  
Aneta Cegielka ◽  
Krzysztof Tambor
Keyword(s):  
Thermal Processing ◽  
Nutritional Value ◽  
Sensory Quality ◽  
Raw Material ◽  
Font Size ◽  
Control Product ◽  
Physical Chemical ◽  
Sensory Analyses ◽  
Addition Level

<span style="font-family: Times New Roman; font-size: small;"> </span><p>Four formulations of chicken burger were prepared: control product without inulin, and products with 1.0, 2.0 or 3.0 % of inulin (in relation to the weight of meat, fatty raw material, and water), respectively. Physical, chemical and sensory analyses were made to evaluate the effect of inulin on the quality of cooked burgers. The results showed that the application of inulin did not cause significant decrease of the thermal processing yield nor the shear force of the products. However, the addition of inulin resulted in slight, but significant differences (P &lt; 0.05) in chemical composition and energy value of burgers. Burgers of all formulations were acceptable in sensory characteristics. The addition level of inulin not higher than 1.0 %, did not result in deterioration of physical, chemical and sensory quality characteristics of chicken burgers. To improve the nutritional value of chicken burgers, the modification of fatty acid composition is recommended.</p><span style="font-family: Times New Roman; font-size: small;"> </span>

Preparation of Glass-Ceramics Using Molybdenum Tailings

2011 ◽  
Vol 284-286 ◽  
pp. 1431-1434 ◽  
Author(s):  
Jin Rui Zhang ◽  
Ru Wang
Keyword(s):  
Heat Treatment ◽  
Thermal Analysis ◽  
Differential Thermal Analysis ◽  
Crystalline Phase ◽  
Glass Ceramics ◽  
Chemical Properties ◽  
The Other ◽  
Raw Material ◽  
Physical Chemical ◽  
Nucleation Agents

In order to utilization the molybdenum tailings which be deposited in large quantities. Test used it to prepare glass-ceramics as main raw material, TiO2 as nucleation agents and CaO-Al2O3-SiO2 system and wollastonite as the principal crystalline phase. Heat treatment system of glass-ceramics was based on the differential thermal analysis. The crystalline phase, microstructure and characteristics of glass-ceramics were analysis by XRD, SEM and physical, chemical properties test. The result shows that the performance of glass-ceramics was superior to the other types of building decoration stone.

Study of the structure of polyphenylsiloxanes containing the metal-ions by physical–chemical methods

2017 ◽  
Vol 1145 ◽  
pp. 300-308 ◽  
Author(s):  
N.P. Shapkin ◽  
V.I. Razov ◽  
V.V. Korochentsev ◽  
E.A. Tokar ◽  
S.V. Gardionov ◽  
...  
Keyword(s):  
Metal Ions ◽  
Chemical Methods ◽  
Physical Chemical

Combination of physical-chemical methods and ozonation

2019 ◽  
pp. 199-246
Author(s):  
Tatyana I. Poznyak ◽  
Isaac Chairez Oria ◽  
Alexander S. Poznyak
Keyword(s):  
Chemical Methods ◽  
Physical Chemical
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