Physico-Mechanical and Chemical Characteristics of Amber

2018 ◽  
Vol 277 ◽  
pp. 80-89 ◽  
Author(s):  
Zynovii Malanchuk ◽  
Viktor Moshynskyi ◽  
Yevhenii Malanchuk ◽  
Valerii Korniienko
Keyword(s):  
Chemical Composition ◽  
Cross Section ◽  
Sandy Soil ◽  
Chemical Elements ◽  
Chemical Characteristics ◽  
Geological Cross Section ◽  
Sandy Shale ◽  
The Cost ◽  
Physical And Chemical

Amber of amber-bearing deposits in Rivne-Volyn region of Ukraine has been analyzed. Relying upon instrumental techniques, physical and chemical as well as spectral analyses, and geological prospecting of the deposits, chemical composition and ultimate composition of amber occurring at the territory of Klesiv deposit (Ukraine, Rivne Region, Sarny District) have been identified. Klesiv amber contains the greatest part of inclusions; it contains 18 chemical elements. Basing upon the performed geological cross-section it has been determined that the amber occur in sandy soil and sandy-shale soil. The depth is insignificant – from 1 m to 10 – 15 m. Moreover, to determine the cost, experimental technique has been developed. The technique involves classification of the amber fragments according to their form, dimensions, and colour. Lithologic-and-facies sections of sites of Klesiv deposit have been obtained.

scholarly journals Features of the physical and chemical characteristics of water of energy facilities for aquaculture tasks

2021 ◽  
Vol 288 ◽  
pp. 01049
Author(s):  
Marina Kalaida ◽  
Maria Gordeeva
Keyword(s):  
Temperature Factor ◽  
Chemical Characteristics ◽  
Climate Risks ◽  
Physical And Chemical Characteristics ◽  
Production Water ◽  
Urgent Task ◽  
Weather And Climate ◽  
Breeding Zone ◽  
Physical And Chemical

Energy facilities and water are inextricably linked. Accordingly, the issue of water quality, its transformation as a result of industrial use of energy facilities and the assessment of further use for aquaculture purposes is an urgent task of our time, especially in relation to weather and climate risks for industries. The article provides a classification of water according to the water supply technology of energy facilities by temperature factor and the possibility of using it for aquaculture tasks. In total, three classes of water are distinguished according to the temperature factor: waters with natural physical and chemical characteristics, where the temperature regime of reservoirs corresponds to the geographical zone in which the reservoir is located (cultivation of fish associated with fish-breeding zone in which the reservoir is located); water of bassin-coolers of energy facilities, characterized by the presence of a zone of increased temperatures as a result of the discharge of heated water (organization of flood-proof farms with polycyclic production); water of cooling ponds (cultivating fish capable to the fight against eutrophication).

scholarly journals Consequences of microphysical segregation of chemical elements in welded steels

2019 ◽  
Vol 75 (2) ◽  
pp. 206-213
Author(s):  
V. A. Bigeev ◽  
A. B. Sychkov ◽  
M. V. Potapova ◽  
G. Ya. Kamalova
Keyword(s):  
Chemical Composition ◽  
Continuous Casting ◽  
Cross Section ◽  
Nonmetallic Inclusions ◽  
Chemical Elements ◽  
Segregation Coefficient ◽  
Alloying Element ◽  
Magnetic Stirring ◽  
Billet Cross Section ◽  
Electro Magnetic

Defects of metallurgy-originated steel (sub-cored bubbles, impurities, macro- and micro-segregations of chemical elements, nonmetallic inclusions) to a large extent determines the faultiness of metal rolled products. The processes of chemical elements segregation in steel macro- and micro volumes considerably influence its quality. Reasons of microphysical dendrite segregation originating in steels of welding purpose of Св-09Г2С and Св-08ГНМ type considered. Mechanism of dendrites formation studied as well as the segregation degree of chemical elements along the continuously casted billet cross section. To estimate the segregation degree a criteria was used – the segregation coefficient, determined as relation of chemical elements mass shares in different micro-areas (dendrites, inter-dendrite gaps) of continuously casted billet cross section to those elements content by a ladle analysis of a heat or one another in different micro-areas. A heredity of segregation transfer from CC billet to finished wire rod of Св-08Г2С and Св-08ГНМ steels studied. It was determined, that decrease of the number of bainite-martensite areas as a result of decrease of dendrite segregation of chemical elements takes place by minimization within grade chemical composition of both main alloying element and impurities ones. Besides an additional alloying of steel by boron takes place based on boron to nitrogen relation at the level of B/N = 0,8±0,15. It was shown that to decrease the inter-dendrite segregation it is necessary to elaborate and implement effective steel modifying by calcium and REMs regimes as well as electro-magnetic stirring during continuous casting.

scholarly journals Post-pyrogenic changes in the properties of grey forest podzolic soils of ecogeosystems of pine forests under conditions of anthropogenicloading

2018 ◽  
Vol 27 (2) ◽  
pp. 175-183 ◽  
Author(s):  
V. Asotskyi ◽  
Y. Buts ◽  
O. Kraynyuk ◽  
R. Ponomarenko
Keyword(s):  
Chemical Composition ◽  
Chemical Elements ◽  
Chemical Properties ◽  
Heavy Metal Concentration ◽  
Forest Litter ◽  
Negative Influence ◽  
Exchange Cations ◽  
Chemical Properties Of Soils ◽  
Physical And Chemical ◽  
And Chemical Properties

This article presents the analysis of results of experimental data of postpyrogenic change of soils of ecological systems of pine forests.Ground fires transform the surface organogenic horizons of soils. The negative influence of low-intensity fires of different intensity on the change of humus stock, qualitative fractional composition of organogenic soil horizons and their chemical composition is shown.Post-pyrogenic transformations of physical and chemical soil characteristics are found, which are not simply their corresponding reaction to the pyrogenic effect, but a clear signal reflecting the state of the soil immediately after the fire, taking into account its strength and intensity, and after a certain period of time. There is a certain dependence of the degree of pyrogenicity on the duration of the effect of fire on the soil. The recent influence of a medium intensity fire on the soil is marked by a clear reaction of the complex of its properties.Physical and chemical properties of soils after fires deteriorate: humus burns, the content of nitrate nitrogen decreases.Forest fires sharply change the morphological state of the upper part of the soil profile. The nature of the surface horizons of soils changes, a new pyrogenic horizon is formed, which differs from natural analogues in terms of physical and chemical properties and the content of ash elements. Under the influence of fire there are changes in such properties as: pH, content of exchange cations, gross and moving forms of nitrogen, etc.The heavy metal concentration in surface horizons increases several times and exceeds the background values due to the mineralization of forest litter and herbaceous vegetation from the combustion and subsequent migration of chemical elements , which presents an environmental hazard.The change in the chemical composition of soils can create conditions for the impossibility of the existence of a root ecosystem, its death, and development, after a certain time, of another modified ecogeosystem.

Physical and Chemical Characteristics of High Clay Content Dredger Fill in Different Regions

2013 ◽  
Vol 477-478 ◽  
pp. 614-619
Author(s):  
Xiao Ping Su ◽  
Jing Song
Keyword(s):  
Chemical Composition ◽  
Granulometric Composition ◽  
Bohai Sea ◽  
Clay Content ◽  
Chemical Characteristics ◽  
Physical Composition ◽  
Dredger Fill ◽  
Physical And Chemical ◽  
Sea Coast ◽  
Different Soils

The use of high clay content dredger fill is a popular way to reclaim and create new land for development in coastal areas. In this paper, the dredger fill samples were obtained from 7 locations on the Bohai Sea coast in China. The soils were tested for Granulometric composition, physical composition, chemical composition, and Atterberg Limits. These results are reported. The principle finding shows that the chemical composition of the pore fluids, such as namely problems of drainage and consolidation, has influence on the geotechnical properties of different soils. This work provides the basis for further research on the drainage and consolidation properties of high clay content dredger fill.

scholarly journals Evaluation of physico-chemical characteristics of fresh, refrigerated and frozen Lacaune ewes' milk

2014 ◽  
Vol 66 (6) ◽  
pp. 1924-1930 ◽  
Author(s):  
L.W. Fava ◽  
I.C. Külkamp-Guerreiro ◽  
A.T. Pinto
Keyword(s):  
Chemical Composition ◽  
Titratable Acidity ◽  
Heat Stability ◽  
Chemical Characteristics ◽  
Total Solids ◽  
Average Percentage ◽  
Sheep Milk ◽  
Consequent Reduction ◽  
The Stability ◽  
Physical And Chemical

The production of ewe milk is seasonal and milk yield per animal is low, even in specialized animals. This study aimed to verify the possibility of preserving bulk tank milk for seven days under cooling (5°C) and freezing (-5°C), verify the influence of cooling treatments and of the months of the year on the physical and chemical characteristics of the product. The chemical composition of milk, including the fat, protein, lactose and total solids contents, was not altered by cooling and freezing. Protein and lactose contents varied according to the months of the year. The average percentage and standard deviation of fat, protein, lactose and total solids was 8.10±1.30, 5.22±0.37, 4.43±0.23 and 19.34±1.54, respectively. The density, pH, titratable acidity, as well as alcohol and heat stability tests were significantly influenced by the treatments used (P < 0.05), but no differences were found between fresh and frozen milk. Prolonged refrigeration caused an increase in acidity and decrease in pH, with a consequent reduction in the stability of milk. These results demonstrated that freezing does not affect the chemical composition and physical characteristics of milk in nature and it could be a solution for the producer and the sheep milk industry.

scholarly journals Effect of harvest at different times of day on the physical and chemical characteristics of vegetable-type soybean

2012 ◽  
Vol 32 (2) ◽  
pp. 351-356 ◽  
Author(s):  
Andréia Cristina Santana ◽  
Mercedes Concórdia Carrão-Panizzi ◽  
José Marcos Gontijo Mandarino ◽  
Rodrigo Santos Leite ◽  
Josemeyre Bonifácio da Silva ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Chemical Composition ◽  
Phytic Acid ◽  
Chemical Constituents ◽  
Chemical Characteristics ◽  
Phytic Acid Content ◽  
Lower Protein ◽  
Physical And Chemical ◽  
Lower Protein Content

The objective of this study was to evaluate the effect of harvest at different times of day on the chemical and physical characteristics of vegetable-type soybean BRS 267 cultivar, harvested at the R6 stage (seed development) and to compare it with that on the grains harvested at the R8 stage (maturation). The pods of the BRS 267 cultivar were harvested at the R6 stage (at 8:00 AM, 12:00 AM, and 6:00 PM), the color parameters were evaluated, and the grains were analyzed for chemical composition, activity inhibitor trypsin, phytic acid content, starch, sugars, fatty acids, and isoflavones. No differences were observed among the different harvest times in terms of the chemical constituents of vegetable-type soybean BRS 267 cultivar harvested at the R6 stage. Isoflavones content did not change with different harvest times, and the aglycone forms (daidzein, glycitein, and genistein) were found in smaller quantities at the R6 stage compared to the R8 stage. The color of the pods of soybean BRS 267 cultivar, harvested at the R6 stage did not change with different harvest times. The grains harvested at the R6 stage had lower protein content, phytic acid, and sucrose and higher levels of lipids, carbohydrates, starch, glucose, fructose, stachyose, and linolenic acids than those collected at the R8 stage. The different times of harvest did not affect the quality of the vegetable-type soybean BRS 267 cultivar harvested at stage R6. Nevertheless, it is recommended to harvest in the morning, when the temperature is milder, like other vegetables, to facilitate and optimize its marketing and in natura consumption.

scholarly journals Physico-chemical characteristics of geothermal water in Tulare near Medvedja

2021 ◽  
Vol 19 (2) ◽  
pp. 57-68
Author(s):  
Andjelina Maric ◽  
Tomislav Pavlovic ◽  
Dragoljub Mirjanic
Keyword(s):  
Chemical Composition ◽  
Geothermal Water ◽  
Chemical Characteristics ◽  
Legal Regulations ◽  
Geological Characteristics ◽  
Physical Chemical ◽  
Physico Chemical ◽  
Chemical Composition Of Water ◽  
Regional Position ◽  
Physical And Chemical

The paper presents general characteristics and legal regulations for the use of thermomineral waters in Serbia, provides information on the regional position and geological characteristics of Tulare near Medvedja, the springs of water in Tulare and the methods of testing the physical and chemical characteristics of water in Tulare are described. In addition, the results of measuring the temperature, hardness, acidity, and chemical composition of water in Tulare are given. The results of the measurements showed that the water in Tulare belongs to homeothermal waters, that is soft to very soft, slightly acidic, and has an increased amount of Na, Ca, K and Mg, and also Sr, B, Li, P, As and Hg in small quantities. The water from the spring in Tulare is not suitable for drinking. To determine the balneological utility of the water in Tulare it is necessary to carry out appropriate drilling and further examine the physical, chemical, and balneological properties of this water.

scholarly journals Study the Nature and the Effects of the Impurities of Phosphate Rock in the Plants of Production of Phosphoric Acid

2008 ◽  
Vol 7 (2) ◽  
pp. 1296-1299
Author(s):  
Ahmed Chaabouni ◽  
Chaker Chtara ◽  
Ange Nzihou ◽  
Hafed EL Feki
Keyword(s):  
Chemical Composition ◽  
Phosphoric Acid ◽  
Analytical Methods ◽  
Manufacturing Process ◽  
Phosphate Rock ◽  
Chemical Properties ◽  
Operating Conditions ◽  
Chemical Characteristics ◽  
Phosphate Rocks ◽  
The Cost

Phosphate rocks from different deposits vary widely in composition, and these variations have important effects in phosphoric acid production. All phosphate rocks contain many impurities. Knowledge of the nature and contents of the various elements in the phosphate is required in the manufacturing process of phosphoric acid. All these chemical characteristics can help the operator to foresee its objectives under the operating conditions and the cost of production in the manufacturing process of phosphoric acid.Two Tunisian natural phosphates coming from two different deposits were selected. We propose in this work studying the effects of the impurities that depending on their concentration can affect decisively the behavior of these ores in the process of production of phosphoric acid. Study the chemical composition of these ores is carried out according to standard analytical methods used for raw phosphates.The results obtained show a slight difference in chemical properties between the two types of sedimentary phosphates and their aptitude to be used in the plants of production of phosphoric acid. 

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