Papers by Keyword: Regeneration

Abstract: The detailed study devoted to instrumental diagnostic methods of bone tissue research was performed by authors. The main idea which is the basis for this work is the analysis and study of X-ray methods for examining bone tissue, highlighting their advantages. As a result of the work, we analyzed published scientific data in Russian and foreign literary sources, which addresses many instrumental methods of bone tissue research. After experiments a detailed description of the most common research methods related to the study of bone tissue was given, its structure and other functions. Analysis of the modern scientific data has shown that there is a great need to know the instrumental methods for studying human organs and systems, and their more accurate possibilities for identifying pathological processes, which will permit the use of the research method that in any particular case will be the most informative, which would provide timely diagnosis and its accuracy.

Abstract: The detailed research and analysis of modern data on the problem of methods of histological and immunohistochemical researches of connective tissue, bone in particular, was conducted by us so as to evaluate the possibility of creating a single method of bone tissue immunohistochemical analysis.The description was given in detail to most widespread methods of preparation of connective, bone in particular, tissues for the research conduction during experiments connected with the study of bone tissue regeneration including implants with bioactive coverage. The present-day medical data reflects a variety of methods of immunohistochemistry, as well as the experience of their use in complex trauma surgery. However, there is no consensus about which method and material are most reliable when conducting this analysis.

Abstract: Given that the quality of water supplied to hot water supply systems must meet drinking water requirements, it is also important that the water preparation process is of great importance. The quality of that water is also important in terms of preventing the formation of heat in hot water systems. It is known that the main cause of the formation of water is the presence of calcium and magnesium cations and bicarbonate and sulfate anions in water. The traditional methods for preventing the limescale include the combination of calcium and magnesium cations from the water and replacing them with cations that are not easy to resolve at high temperatures. The quality of water treated by these methods does not meet drinking water requirements. Taking these into account, the Cl-anionizationprocess of drinking water has been developed in high-tech anionite technology. According to this technology, the first water from the city water gridis processed through anionite and activated carbon filters, which are mechanically charged with high anionite. The treated water is then cleaned out of microbes and bacteria through the ultraviolet disinfection equipment and delivered to the operator according to the quality requirements for drinking water. In the chlorine-anionization process, most of the sulfate and bicarbonate anions in water change to chlorine anions and their solidity remains constant. Thus, the density of the limescale-forming anions in the water decreases sharply and it meets the quality indicators of drinking water. High-grade anionite in the filter (8÷12) is regenerated by NaCl solution. The filtration rate of the solution from the anionite is determined depending on the concentration of calcium cations contained in the salt given for regeneration. Regeneration mode is such that the CaCO3 combination does not crumble when the anionite layer is formed. It is known that the temperature of the heated water in the hot water supply system does not exceed (60÷70)°C. In this case, the decomposition of limescale at Hc<2 mg-eq/l (carbonate hardness) is not observed. As carbonate hardness increases to 4 mg/l, the thin layer in the system shows a collapse. The basic element of the proposed technological schemeCl-anionite filter was applied at ADA University in Baku and positive results were obtained. Early observed collapse of pipes has been prevented and the working regime of hot water heaters has improved. A high-performance anionite such as A200EMBCl, which is a major ingredient of the UK's Purelite, and then the Russian-made AB-17-8 high-anionite anions have been used on the device.

Abstract: The analysis of the engineering process of reforming dead catalysts for the extraction of platinum group metals has been carried out. Fully-dead catalyst, having passed several cycles of regeneration and entitled to utilization, has the considerable carbonaceous deposits, both on external and internal surfaces. Their content averages 5.0% of the mass of the catalyst. The research objectively consisted in selection of the sweet roasting modes, promoting the fullest removal of the dense carbonaceous deposits from the surface of the dead platinum-rhenium catalysts. The kinetics research of carbonaceous removal deposits from the surface of the catalyst was carried out in a pipe-still heater; oxygen content, duration and temperature of sweet roasting being varied. The maximum temperature during the research reached 950°C, the maximum duration of isothermal holding didn't exceed 6 hours. The extent of carbonaceous deposits removal was calculated by changing sample weight. The kinetic curves were approximated by high-order polynomials, which made it possible to obtain a diagram, illustrating the degree of organic deposits removal, depending on temperature and firing time. It is shown that in the environment enriched to 30-35 vol. % oxygen, the engineering process of catalysts for regeneration is possible to be carried out at 650 °C, with holding for 2 hours at a specified temperature. The alternative of sweet roasting is the air blowing of dead catalysts at temperature of 800 °C within an hour. Both modes guarantee the complete removal of the dense carbonaceous deposits from the surface of the dead catalyst.

Abstract: This study aims to demonstrate the importance of using the 1-butyl-3-methylimidazolium tetrafluoroborate [BMIM] [BF₄] ionic liquid (IL) as a green solvent in the extractive desulfurization of commercial gasoline, as a complementary technology to conventional hydrodesulfurization (HDS), which has limitations in the removal of sulfur aromatic compounds. The extractive desulfurization of gasoline was evaluated by means of a factorial design to determine the best extraction conditions, considering temperature (25 and 35 °C), feed/solvent mass ratio (3/1 and 1/1) and number of extraction stages (1 and 3 stages). The results show a maximum sulfur removal efficiency of 40%. In addition, the selectivity of [BMIM] [BF₄] in the removal of aromatic sulfur compounds from gasoline, its extraction mechanism and the effects of desulfurization using IL regenerated by means of washing cycles with water and/or diethyl ether was investigated.

Abstract: Housing and activities integrate the satisfaction of other human needs. In this regard, we can look at housing as a tool for the development of society itself. The division of different forms of housing in the Czech Republic into several groups can be done in many different ways. It always depends on who formulates the different types of housing.

Abstract: Mature coconut water is always been thrown away as a waste. However, it contain a lots of nutritional elements such as amino acids, pytohormones and minerals. Plant needs some essential nutrients besides pytohormones for their growth and development. In this study, the effect of waste mature coconut water and sucrose was observed on the micropropagation of dragon fruit tree (Hylocereus polyrhizus). The stem was inoculated on MS medium containing Benzyleaminopurine (BAP) 0.03mg/L BAP and 0.01mg/L Naphthaleneacetic acid (NAA) supplemented with waste mature coconut water in various concentrations (0%, 2%, 4% and 6% v/v) and with various concentrations : 0%, 1%, 2% and 3% of sucrose respectively. As the concentration of the waste mature coconut water and sucrose increased up to 4 % and 3%, increase in the elongation of the stem and the number of root regenerated per explant was observed repectively. In conclusion, waste mature coconut water has enhanced the elongation of the shoots but has not promoted on the root induction with the suitable amount of sucrose.

Abstract: Due to the developed pore structure ,high specific surface area, low cost, accessible raw materials and stable physical and chemical properties, activated carbon has caused high attention of society. Nowadays activated carbon has been widely used in capacitor electrode production, water pollution treatment, medicine and other fields. We review the various preparation methods of activated carbon and analyze the advantages and disadvantages of them in this paper. The characteristics of activated carbon regeneration technology are also discussed from the perspective of improving the utilization rate of activated carbon. With the development of China's green economy and the increasing awareness of people's environmental protection, the research on the preparation and regeneration of activated carbon will surely have a broader development prospect.

Abstract: There were considered the distinctive features of the historical center of the city, its cultural and artistic value. Attention is drawn to the fact that the space of this center reflects the most important features of the historical character of the city. The object and the subject of the research, as well as the purpose, objectives and methods of research were set. There were determined the complex of measures which are necessary to carry out the reconstructive arrangements. There were analyzed the main actions which are necessary to implement the regeneration of historical residential areas. The great attention was paid to the problems of preservation of architectural-construction heritage, interaction of all participants of architectural activity in the present context.

Abstract: The dynamic behavior of bed for regeneration of cerium oxide high temperature gas desulfurization sorbent under the atmosphere of O₂ was investigated in the fixed bed micro-reactor. O₂ concentration during the regeneration can be detected by an oxygen analyzer, and the sulfur content of sorbent in the bed was test using sulfur analyzer. The effects of O₂ concentration, regeneration temperature on the dynamic behavior of bed for regeneration of CeO₂ desulfurization sorbent were discussed. According to the experimental results, the length and movement speed of regeneration zone are calculated. The results showed that the increase of O₂ concentration in inlet gas obviously improves the movement speed of regeneration zone in bed for CeO₂ desulfurization sorbent, and the increase of regeneration temperature can decreased the length of the regeneration zone and improved the movement speed of the regeneration zone. The increase of regeneration temperature had a better effect on the improvement of bed utilization of sorbent than that of O₂ concentration.