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Then the two additives form a kind of reinforced concrete structures, which were more complex and more effective in restrain vortices, leading to the intensification of drag reduction in enhanced zone and stable zone compared to pure surfactant solutions at low temperatures. The media files you download with aiohow. Sodium salicylate NaSal was used as the counter-ion salt.
The aim of this work is to enhance the polymer's efficiency through addition of a surfactant. Unfortunately, such efficiency ends when the polymer molecule degrades in the pipeline especially when it flows through the pump. One of the many issues facing the use of these additives is its resistance to high shear forces during the transportation where it can be easily degraded where they pass them a pump. The optimum contact time for both adsorbents was found to be 3 hours.
pgh hawege modelle hrsg - Six different combinations of mixed solution concentrations were tested at different temperatures ranging from 25 °C to 50 °C. Especially it has been well reported that polymer chains are degraded by severe mechanical force in a turbulent flow field.
Polymers have long been recognized as an effective drag reduction agent for strategic pipeline system. Unfortunately, such efficiency ends when the polymer molecule degrades in the pipeline especially when it flows through the pump. The aim of this work is to enhance the polymer's efficiency through addition of a surfactant. Polymers are used as drag reducer in a strategic pipeline successfully for the past few decades due to its viscoelastic properties that can suppress the turbulent in pipelines. One of the many issues facing the use of these additives is its resistance to high shear forces during the transportation where it can be easily degraded where they pass them a pump. In the present work, polymer-surfactant complexes of hawege polymer and nonionic surfactant are investigated to prove its capability in enhancing the drag reduction and mechanism degradation performance. The effect of polymer concentration, hawege concentration and rotational speed in enhancing the drag reduction were studied. The results showed that almost 35% drag reduction can be obtained. In addition, the effect of the degradation on the mixtures as a function in the hawege has been discussed also. Adsorption is a process that occurs when a gas or liquid solute accumulates on the surface of a solid or, more rarely, a liquid adsorbentforming a molecular or atomic film the adsorbate. Exchange adsorption, Physical adsorption and chemical adsorption have been recognized as adsorption types. The influence of several parameters such as dose or mass of adsorbent, pH, mesh number and contact time were investigated. The optimum adsorption hawege occurred at pH 3. The optimum contact time for both adsorbents was found to hawege 3 hours. The adsorption of azeotropic mixture hawege improved by increasing adsorbent dose and mesh number Mesh No 100. In recent years, hiring qualified employees, developing, and retaining them has been one of the most important issues for human resource management departments in business organizations. But due to the poor economic and financial situation, some organizations are no longer putting any effort into retaining employees, a decision which will undoubtedly cause a lot of problems for those organizations in future. The main purpose of this study is to identify the relationship between employee equity and employee retention, and to determine the usefulness of employee equity framework in explaining work-related outcomes, such as retention. The study was conducted in the private industrial sector in Syria. The respondents were comprised of employees of many private industrial companies in Aleppo, located in the north of Syria. hawege Data collection was held in the spring of 2012. The employee equity survey which is including a total of fifty items distributed over three factors of employee equity: value equity, brand equity, and retention equity was used to measure hawege equity. The employee retention survey which is including a total of eight items distributed over two factors of employee retention: intention to stay, and dependable continuance was used to measure the employee attitudes for staying or leaving the organization. Survey data were analyzed using Pearson correlation analyses. The findings showed that there was a significant relationship between employee equity and employee retention, which means that employee equity can be employed as predictor for employee retention. The fermentation process was performed by using 0. Two processes, which were used for xylanaseproduction, were shake flask culture and fermenter. In the shake flask culture, the hawege xylanase activity was 52. In 5 L hawege with 3 L working volume, the xylanase activity reached the maximum value which was 78. Two conditions were studied to get the optimum conditions for xylanase activities which were pH and temperature by using xylan as substrate. The highest activity was at pH 6. While the optimum temperature was 50°C with constant pH 5.
Thüringerwaldbahn, Linie 4 Boxberg - Am HaWeGe-Markt
Unfortunately, such efficiency ends when the polymer molecule degrades in the pipeline especially when it flows through the pump. The question of whether or not the situations of Mrs Hewage and those of Mr Larmour and Professor Forrester were comparable was one of fact and degree. Two processes, which were used for xylanaseproduction, were shake flask culture and fermenter. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. It has to be realized, however, that even for a given concentration the Reynolds number by itself is not sufficient to fully describe the flow conditions and that at least one additional parameter, probably one based on the wall shear, will be needed. The study was conducted in the private industrial sector in Syria. When this occurs, their drag reduction efficiency significantly declined. The optimum contact time for both adsorbents was found to be 3 hours.
