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1 – 10 of over 16000Yang Xuexia, Lao Jihong and Chen Hui
The removing of oil from waste silk is carried out widely by microbial fermentation. However, it is difficult to remove the oil completely. In this study, surfactants were used to…
Abstract
The removing of oil from waste silk is carried out widely by microbial fermentation. However, it is difficult to remove the oil completely. In this study, surfactants were used to enhance microbial oil removing. In seven of the surfactants that were tested, 0.1% of the anionic surfactants inhibited the growth of bacteria and 0.1% of the nonionic surfactants partially inhibited the growth of bacteria. When only the surfactant was used to remove oil, all of the tested surfactants helped remove oil from the waste silk and treatment that added 0.1% AEO-9 gave the lowest oil content.
When surfactants were combined with bacteria to remove oil, the oil content was further reduced and the lowest oil content was obtained by combining AEO-9 and bacteria. The optimum conditions for oil removing by combining AEO-9 with bacteria were pH8.0, temperature 40°C, 4% (v/v) inoculum size and 3 days incubation time. Compared with untreated silk, silk treated by combining surfactants with bacteria resulted in a decrease in oil content and improvement in appearance. Scanning electron micrographs showed that treated samples had a clean surface.
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Previous sections in this series appeared in our October, November and December, 1953, issues and dealt respectively with Properties of the Lubricant and Typical Turbine…
Abstract
Previous sections in this series appeared in our October, November and December, 1953, issues and dealt respectively with Properties of the Lubricant and Typical Turbine Lubricating Systems : Speed Governor and Emergency Control Systems ; The Hydrogen Cooled Alternator. Part Five will deal with the Laboratory Evaluation of Turbine Oils.
ENGINE lubricating oil filtration is not an exact science. Despite recent advances, detailed understanding of how filters and filtration systems operate is sparse, yet filters are…
Abstract
ENGINE lubricating oil filtration is not an exact science. Despite recent advances, detailed understanding of how filters and filtration systems operate is sparse, yet filters are known to facilitate dramatic reductions in engine wear. This paper relates the size of contaminants found in used oil to the magnitudes of the oil films between the lubricated components, in order to define the required filtration level in engines. The results of wear tests with oil contaminated by small particles are used to confirm the filtration requirement.
Ilayda Taneri, Nukhet Dogan and M. Hakan Berument
The purpose of this paper is to use the novel data from the primary vision to determine the main financial and economic drivers of this revolutionary shale oil production and how…
Abstract
Purpose
The purpose of this paper is to use the novel data from the primary vision to determine the main financial and economic drivers of this revolutionary shale oil production and how these drivers changed after 2016 when the US removed its oil-exporting ban.
Design/methodology/approach
In this paper, the authors use the vector autoregressive model to assess the dynamic relationships among the Frac Count (FSCN) from the primary vision and the set of financial/macro-economic variables and how this dynamic relationship is altered with the effects of the US export ban before and after the lifting of the export ban.
Findings
The empirical evidence reveals that a positive shock to New York Mercantile Exchange, Standard and Poor’s 500, rig count, West Texas Intermediate or the US ending oil stocks increase the FSCN but higher interest rates and oil production decrease the FSCN. After the US became one of the major oil producers, it removed its crude export ban in December 2015. The empirical evidence suggests that the shale oil industry gets more integrated with the financial system and becomes more efficient in its production process in the post-2016 era after the export ban was removed.
Originality/value
The purpose of this paper is to use the novel data from the primary vision to determine the main financial and economic drivers of this revolutionary shale oil production and how these drivers changed after 2016 when the US removed its oil-exporting ban.
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In marine service and in industry centrifuging is by far the most widely used method of removing water and sediment from large charges of lubricating oil.