scholarly journals Pd(II) extraction from acid solutions by bis-(2-hidroxyl-5-alkylbenzyl)amine

2021 ◽  
Vol 102 (2) ◽  
pp. 24-30
Author(s):  
S.R. Mammadova ◽  
Keyword(s):  
Organic Compound ◽  
Organic Solvents ◽  
Ammonium Acetate ◽  
Main Task ◽  
Acid Solutions ◽  
Selection Of

It isknown that a series oforganiccompoundscontained in the molecule SH, NH qroups have theabilityto formtheintracomplex compounds under certain conditions. These compounds allowto carryoutthe extraction in acidic mediumandthereforepreventthehydrolysis process. They are not dissolved in water but are soluble in various solvents and form colored solutions and so may be used in extraction chemistry. The main purpose of this paper was to study the ability to extract palladium by bis-(2-hidroxyl-5-alkylbenzyl)amine, synthesized in the laboratory on the basis of industrial alkylphenols. Ammonium acetate with various pH wasused as a buffer to extract palladiumfromPdCl2·2H2O0.1 mkg/ml solution. The main task for theuse of inert organic compound in extraction is the selection of a reagent which dissolves it but does not form any compound. For this purpose the influence of different solvents on this reagent was researched. The experiments show that bis-(2-hidroxyl-5-alkylbenzyl)amine is dissolved well in organic solvents. Itssolution, for examplein kerosene, is light-resistant, does not hydrolyze in water, alkalis and acids.Thus bis-(2-hidroxyl-5-alkylbenzyl)amine may be recomended for palladium extraction.

scholarly journals EXTRACTION OF PALLADIUM

2021 ◽  
pp. 67-71
Author(s):  
S.R. Mammadova ◽  
Keyword(s):  
Organic Compound ◽  
Carboxylic Acids ◽  
Organic Compounds ◽  
Organic Solvents ◽  
Acidic Medium ◽  
Naphthenic Acids ◽  
Main Task ◽  
Extraction Ability ◽  
Selection Of

It is known that a series of organic compounds containing in molecule SH-, NH- qroups, including halogens, carboxylic acids and their derivatives, have the ability to form the innercomplex compounds under certain conditions. These compounds permit to carry out the extraction in acidic medium, that prevents the of process hydrolysis. They are not dissolved in water but are soluble in various solvents and form colored solutions and so may be used as an extractants. The main purpose of this paper is the study of palladium extraction ability for chlorinated naphthenic acids (CNA) synthesited in laboratory on the basis of industrial alkylphenols. Ammoniumacetate with various pH was used as a buffer to extract palladium from PdCl2·2H2O 0.1 mkg/ml solution. The main task for the use of inert organic compound in extraction is the selection of reagent which dissolves it but does not form any compound. With this aim the influence of different solvents on their reagent was researched. The experiments show that chloronaphthenic acid is dissolved well in organic solvents. Its solution, for example in kerosene, is light-resistant, does not hydrolyze in water, alkalis and acids. So, chloronaphthenic recomendefor palladium extraction

SISTEM PENDUKUNG KEPUTUSAN PEMILIHAN GURU BERPRESTASI KOTA MEDAN MENERAPKAN METODE PREFERENCES SELECTION INDEX (STUDI KASUS : DINAS PENDIDIKAN KOTA MEDAN)

2018 ◽  
Vol 2 (1) ◽  
Author(s):  
Fajar Syahputra ◽  
Mesran Mesran ◽  
Ikhwan Lubis ◽  
Agus Perdana Windarto
Keyword(s):  
Decision Making ◽  
Decision Support ◽  
Decision Support System ◽  
Support System ◽  
Formal Education ◽  
Basic Education ◽  
Selection Index ◽  
Main Task ◽  
Selection Of

The teacher is a major milestone in the world of education, the ability and achievement of students cannot be separated from the role of a teacher in teaching and guiding students. Based on the Law of the Republic of Indonesia No. 14 of 2005 concerning Teachers and Lecturers, in Article 1 explained that teachers are professional educators with the main task of educating, teaching, guiding, directing, training, evaluating, and evaluating students in early childhood education through formal education, basic education and education medium. Whereas in Article 4 of the Act, it is explained that the position of teachers as professionals serves to enhance the dignity and role of teachers as learning agents to function to improve the quality of national education.Decision making is an election process, among various alternatives that aim to meet one or several targets. The decision-making system has 4 phases, namely intelligence, design, choice and implementation. These phases are the basis for decision making, which ends with a recommendation.The Preferences Selection Index (PSI) method is a rarely used decision support system method. This method is a method developed by stevanie and Bhatt (2010) to solve the Multi Criteria Decision Making (MCDM). With the right consideration, this method can be one of the tools to determine policies in decision-making systems, especially the selection of outstanding teachers. Determination of policies taken as a basis for decision making, must use criteria that can be defined clearly and objectively.Keywords: Decision Support System, PSI, Selection of Achieving Teachers

scholarly journals Site selection of ecological buildings from the perspective of Chinese geomantic omen

2021 ◽  
Vol 308 ◽  
pp. 02023
Author(s):  
Lang Du ◽  
Yue Sheng ◽  
Jianing Wang
Keyword(s):  
Economic Development ◽  
Natural Environment ◽  
Site Selection ◽  
Chinese Culture ◽  
Living Environment ◽  
Modern Architecture ◽  
Main Task ◽  
Good Living ◽  
The Times ◽  
Selection Of

Geomantic theory is a natural science integrating geophysics, hydrogeology, astrology, meteorology, environmental landscape science, architecture, ecology, and human life information science. Its purpose is to carefully examine and understand the natural environment, to use and transform the nature, to create a good living environment, to win the best time, place, and people, to achieve the perfect realm of the unity of nature and man. In today’s rapid economic development and social progress, how to effectively combine architectural geomantic omen with contemporary architectural design is the concrete embodiment of modern geomantic omen culture keeping pace with The Times, and is also an important subject faced by Chinese traditional culture to benefit contemporary people and promote economic development. This paper combines Chinese geomantic omen with modern architecture and discusses the site selection of modern architecture under the guidance of geomantic omen based on the current ecological environment construction. This paper studies the site selection of ecological buildings under the guidance of geomantic omen, which provides a new idea for the application of ancient geomantic omen in the future site selection of buildings. To treat Chinese geomantic culture correctly, Chinese architecture, as the carrier of Chinese culture, should inherit critically, explore its scientific essence, and use the past for the present or use it with a little modification. This paper attempts to learn from the traditional Chinese geomantic concepts, such as wind, air, sunshine, water, and so on, and apply them to the current ecological building site selection. According to the natural environment analysis, starting from the current actual environment, applying ancient geomantic in modern construction site, adjust measures to local conditions, such as mountain gives a new meaning, while retaining the maximum illumination area, environment, plant more traditional geomantic meaning, create more appropriate, good living environment, also accord with the demand of the national ecological construction. In this paper, the attitude of advancing with The Times to look at geomancy, let geomancy theory towards the direction of the development of the real society, which is the contemporary people to study geomancy, promote geomancy theory, use geomantic omen for the benefit of modern architecture of the main task.

Modern strategies for learning a foreign language in training future teachers of the updated school

2021 ◽  
Vol 46 (1) ◽  
pp. 121-127
Author(s):  
A. Kabbassova ◽  
◽  
J. Sakenov ◽  
Keyword(s):  
Foreign Language ◽  
Learning Strategies ◽  
Bachelor's Degree ◽  
Professional Competencies ◽  
Main Task ◽  
Language Training ◽  
Future Teachers ◽  
Optimal Learning ◽  
Basic Principles ◽  
Selection Of

The relevance of teaching a foreign language to future teachers in the context of updating school education puts forward requirements for the choice of teaching strategies. The article deals with the meta-subject aspect of foreign language training of future teachers. To form the readiness of future teachers to use the potential of a foreign language, it is important to understand the basic principles of integrating the content of special disciplines and knowledge of a foreign language. The meta-subject potential of a foreign language allows you to create opportunities for the development of general and special professional competencies. The formation of the competencies necessary to work with the updated content of education is the main task of the courses of the component for the choice of the bachelor's degree program at pedagogical university. The selection of optimal learning strategies contributes to the implementation of this task. The author examines the features of the use of modern pedagogical technologies and methods in the training of teachers of a new format.

scholarly journals ENRICHMENT OF IN VIVO EFFICACY OF CATECHIN RICH EXTRACT WITH THE APPLICATION OF NANOTECHNOLOGY

2018 ◽  
Vol 10 (5) ◽  
pp. 281
Author(s):  
Monika P. ◽  
Basavaraj B. V. ◽  
Chidambara Murthy K. N. ◽  
Ahalya N. ◽  
Bharath S.
Keyword(s):  
Zeta Potential ◽  
Organic Solvents ◽  
Spherical Shape ◽  
Entrapment Efficiency ◽  
Major Elements ◽  
Oral Dosage ◽  
Biological Efficiency ◽  
Evaporation Technique ◽  
Selection Of

Objective: The primary goal of this study was to convert a natural catechin-rich extract into nanoparticles by using a biodegradable and non-toxic polymer Eudragit L 100 to address the various biopharmaceutical problems of catechin.Methods: Nanoparticles were prepared by emulsion solvent evaporation technique using Eudragit L 100 in increasing concentration. Optimization of processing conditions like a selection of organic solvents, diluent and surfactant concentrations, drug and polymer ratio and method of drying to increase the biological efficiency were duly attempted. Parameters such as dynamic light scattering, zeta potential, SEM and energy-dispersive X-ray spectroscopy were assessed for the evaluation of nanoparticles.Results: The entrapment efficiency was found to be between 35-45 % with methanol compared to other organic solvents. The zeta potential values of all the formulations were in the range of±30 mV to±60 mV) which confirms moderate to good stability. A rapid or ‘burst’ effect of the drug release in pH 6.8 buffer showing 92 % in the first 30 min which gradually decreased to 52 % by the end of 180 min but in the pH 7.4, the release was found to be moderate. SEM and DLS indicated particles were of spherical shape lying in a nanometer range of 100 to 200 nm with a proportional influence of polymer on the particles size.Conclusion: Nanoformulations were found to be more stable and confirmed the presence of major elements such as carbon and oxygen. The findings collectively indicate that it may be worthwhile to apply nanotechnology for the design of an advanced oral dosage form for an enhanced bioavailability and biological efficacy.

Numerical simulations of preliminary state of stress in bundles of metal sheets on the guillotine

2017 ◽  
Vol 85 (1) ◽  
pp. 14-23 ◽  
Author(s):  
J. Kaczmarczyk
Keyword(s):  
Numerical Simulations ◽  
Experimental Studies ◽  
Cutting Parameters ◽  
Cutting Process ◽  
Main Task ◽  
Force Loading ◽  
State Of Stress ◽  
Metal Sheets ◽  
Optimum Cutting ◽  
Selection Of

Purpose: The work is aimed at determination of the influence of selected technological parameters on the preliminary state of stress in bundles of metal sheets being compressed by the pressure beam and submitted to the cutting process on a guillotine. Design/methodology/approach: The numerical simulations concerning the preliminary state of stress in the bundle of sheets were conducted by means of the finite element method and the computer system MSC.Patran with the computational module MSC.Marc. The experimental studies concerning the influence of a force loading the pressure beam on the quality of metal sheets were carried out using scanning electron microscopy. Findings: Possibilities of finding the optimum cutting parameters to maximise the values of preliminary state of stress in the bundle of metal sheets subjected to cutting. Higher values of stresses in the bundle coming from loading the pressure beam on the one hand decrease the maximum values of cutting force and thereby facilitate the performance of the cutting process, however on the other hand too high values of stresses might damage the surface of the top sheet in a bundle. Research limitations/implications: The main task of the presented research concerns the reduction of the maximum force generated on a knife during the cutting process. It is possible by increasing the values of preliminary state of stress realized in practice by applying higher values of a force loading the pressure beam. The force should not be too high in order to avoid damaging of the top sheet in the bundle loading by the pressure beam. Practical implications: The appropriate selection of the cutting parameters on account of preliminary state of stress in the bundle of sheets is essential in terms of industrial economy. It enables reducing the amount of waste caused by defects in bundles of sheets and decreases wear of the cutting tool. The research has been conducted in order to reduce the number of randomly occurring defects during cutting of metal sheets on a guillotine. Originality/value: The results acquired from the research facilitate selection of the best parameter settings required for conducting the optimum cutting process on a guillotine. The optimum set of cutting parameters leads to the reduction of defects’ number occurring during the process.

scholarly journals RESEARCH OF APPLICATION EFFICIENCY OF PIGGYBACK TECHNOLOGY OF CARGO TRANSPORTATION IN UKRAINE

2021 ◽  
pp. 56
Author(s):  
R. VERNYHORA ◽  
I. ZHURAVEL ◽  
L. YELNIKOVA
Keyword(s):  
Road Transport ◽  
Main Task ◽  
Scientific Publications ◽  
Technology Application ◽  
Existing Problems ◽  
Transport Services ◽  
Analysis And Synthesis ◽  
Cargo Transportation ◽  
Effectiveness Assessment ◽  
Selection Of

Purpose. In modern conditions of the transport services market functioning, the main task of a customer-oriented carrier is to provide high-quality services for the needs of the clientele in cargo transportation, taking into account modern technologies and world experience. The aim of the work is to analyze the existing problems and prospects for organizing piggyback transportation and the effectiveness assessment of this technology application on the example of one of the most potential routes. Methodology. During the research, methods of analysis and synthesis were used to study the main provisions of scientific publications about world experience of organizing piggyback transportation, methods for determining tariffs for cargo transportation and technical - economic calculations for the selected variants. Findings. Ukraine has significant potential for the development of combined transportation, in particular, in international traffic. One of the most efficient and perspective combined transport technologies in the world is a piggyback transportation. A comparative assessment of the shippers’ costs for cargo transportation using different technologies between the terminals Dnepr-Liski and Chop has been carried out. Scientific novelty. The obtained results make it possible to provide a scientific and economic basis for the selection of expedient variants for combined cargo transportation. Practical value. The obtained results of the analysis of the use effectiveness of piggyback technology, taking into account the existing tariffs and competition with road transport on the specific logistics route, can be used for a preliminary assessment and decision-making about the use of different types of combined transport as an alternative to direct road or rail cargo transportation.

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