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Zeitschriftenartikel zum Thema „Purification“

Autor: Grafiati

Veröffentlicht am 4. Juni 2021

Zuletzt aktualisiert am 30. Juli 2024

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1

Arakawa, Shizuka, Kohsuke Kamizaki, Yusuke Kuwana, Naruki Kataoka, Chieko Naoe, Chie Takemoto, Takashi Yokogawa und Hiroyuki Hori. „Application of solid-phase DNA probe method with cleavage by deoxyribozyme for analysis of long non-coding RNAs“. Journal of Biochemistry 168, Nr. 3 (03.05.2020): 273–83. http://dx.doi.org/10.1093/jb/mvaa048.

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Abstract The solid-phase DNA probe method is a well-established technique for tRNA purification. We have applied this method for purification and analysis of other non-coding RNAs. Three columns for purification of tRNAPhe, transfer-messenger RNA (tmRNA) and 16S rRNA from Thermus thermophilus were connected in tandem and purifications were performed. From each column, tRNAPhe, tmRNA and 16S rRNA could be purified in a single step. This is the first report of purification of native tmRNA from T. thermophilus and the purification demonstrates that the solid-phase DNA probe method is applicable to non-coding RNA, which is present in lower amounts than tRNA. Furthermore, if a long non-coding RNA is cleaved site-specifically and the fragment can be purified by the solid-phase DNA probe method, modified nucleosides in the long non-coding RNA can be analysed. Therefore, we designed a deoxyribozyme (DNAzyme) to perform site-specific cleavage of 16S rRNA, examined optimum conditions and purified the resulting RNA fragment. Sequencing of complimentary DNA and mass spectrometric analysis revealed that the purified RNA corresponded to the targeted fragment of 16S rRNA. Thus, the combination of DNAzyme cleavage and purification using solid-phase DNA probe methodology can be a useful technique for analysis of modified nucleosides in long non-coding RNAs.

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Urbański, Stanisław. „Natura drogi oświecenia według o. Pawła Ogórka OCD“. Łódzkie Studia Teologiczne 23, Nr. 2 (28.06.2023): 147–58. http://dx.doi.org/10.52097/lst.2023.2.147-158.

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The path of enlightenment consists imitating of Jesus by practicing the virtues, especially the supernatural ones. The condition for this development of virtues is a some purity of heart. Man has to put his passions in order and fight with his major weaknesses. Then comes self-control, order in everyday life, deep conviction of the truths of faith, and more time to talk with the Lord during prayer. To achieve this state, a Christian must to pass a process of passive purification, which leads him into the mystical life. All imperfections must be removed. Therefore, God’s intervention is needed, which is expressed through special inspirations. Then the gifts of the Holy Spirit enable us to receive them. The Christian experiences passive purifications of senses and of spirit. This state can be compared to the purification of the senses. The purification of the soul is compared to the purification of gold in a crucible. In this state, prayer develops from meditation to emotional prayer. The Christian must therefore remove the obstacles in the development of prayer.

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Gu, Hong, Yong Zhi Zou, Zheng Bin Xu und Jian Min Zeng. „Investigation on Purification and Degassing of TiB₂/Al Composite Fabricated by LSM Method“. Key Engineering Materials 353-358 (September 2007): 3051–54. http://dx.doi.org/10.4028/www.scientific.net/kem.353-358.3051.

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In the present paper, TiB2/Al composite with 5% volume fraction of TiB2 was fabricated by LSM method. The effects of purification and degassing methods on TiB2/Al composite were examined by means of X-ray diffraction (XRD) and image analysis. Hydrogen contents in the molten composites were detected and compared among flux, inert gas and vacuum purification processes. The experimental results indicate that under general cast condition a majority of the TiB2 particles distribute on grain boundary, and only a few particles disperse within grains. The flux and vacuum purifications have no virtual impact on the distribution of TiB2 and the fraction of TiB2 remains the same after purification. However, degassing with inert gas will be detrimental; the TiB2 particles will be separated and removed from the matrix. The hydrogen contents for flux, inert gas and vacuum processes are 0.15ml/100g/Al, 0.12ml/100g/Al and 0.12ml/100g/Al respectively.

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Nelidkin, A. V., S. N. Borychev und D. O. Oleynik. „DEVICE FOR PURIFICATION OF DIESEL ENGINE EXHAUST GASES“. Vestnik Altajskogo gosudarstvennogo agrarnogo universiteta, Nr. 8 (2021): 92–97. http://dx.doi.org/10.53083/1996-4277-2021-202-08-92-97.

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To ensure high quality and productive work of employ-ees, it is necessary to achieve the target parameters of the microclimate and to exclude harmful and toxic substances in the atmosphere of the working area of agricultural prem-ises of a closed volume and air exchange. The main rea-son for the distortion of the air-gas regime of the room is the use of agricultural machines in closed industrial prem-ises (warehouses, storage facilities, livestock facilities, etc.). As a result, there is a decrease in the quality of prod-ucts and working conditions at agricultural enterprises, as well as a reduction in the operational life of structures. To-day, in agricultural machinery, diesel engines are most often used as power units which, unlike gasoline engines are more economical, and also reduce the harmful impact on the environment. But, despite this, the operation of die-sel engines still causes the accumulation of harmful com-ponents in the atmosphere of the room which negatively affects the health of the staff. The analysis of the designs of devices for exhaust gas purificationof internal combus-tion engines revealed the problems that affect the efficien-cy of the purification. The most significant problems are as following: large weight and dimensions, reduced efficiency of the neutralizers when the engine is running at modes close to the nominal ones, and large gas-dynamic re-sistance. To solve these problems, the design of a device for exhaust gas purificationin diesel engines was devel-oped. The use of this utility model will increase the efficien-cy of the device for exhaust gas purification. It will improve the environmental performance of the diesel engine reduc-ing emissions of harmful substances and soot into the at-mosphere.

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Thomas, Aleena, Baptiste Gasch, Enzo Olivieri und Adrien Quintard. „Trichloroacetic acid fueled practical amine purifications“. Beilstein Journal of Organic Chemistry 18 (24.02.2022): 225–31. http://dx.doi.org/10.3762/bjoc.18.26.

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Amine purification have for long been dominated by tedious stepwise processes involving the generation of large amounts of undesired waste. Inspired by recent work on out of equilibrium molecular machinery, using trichloroacetic acid (TCA), we disclose a purification technique considerably decreasing the number of operations and the waste generation required for such purifications. At first, TCA triggers the precipitation of the amines through their protonated salt formation, enabling the separation with the impurities. From these amine salts, simple decarboxylation of TCA liberates volatile CO2 and chloroform affording directly the pure amines. Through this approach, a broad range of diversely substituted amines could be isolated with success.

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Andersen, Astrid Oberborbeck. „Purification“. Science, Technology, & Human Values 43, Nr. 3 (02.08.2017): 379–400. http://dx.doi.org/10.1177/0162243917723079.

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In Arequipa, Peru’s second largest city, engineers work hard to control water flows and provide different sectors with clean and sufficient water. In 2011, only 10 percent of the totality of water used daily by Arequipa’s then close to 1 million people—in households, tourism, industry, and mining—was treated before it was returned to the river where it continues its flow downstream towards cultivated fields and, finally, into the Pacific Ocean. It takes specialized knowledge and manifold technologies to manage water and sustain life in Arequipa, and engineers are central actors for making water flow. Examining the ecology of water management, this article asks to what extent we can talk of a way of knowing and enacting water that is particular to engineers. Through engineering practices, a technical domain emerges as separate from and superior to political and social domains. This production of categories can be understood as practices of purification. However, a purely technical grip on water is never possible. Unruly elements, like weather, contamination, urban dwellers, and competing interests, interfere and make processes of intervention unstable. Water is never completely cleaned, and, equally, the continuous processes of purification of categories and domains take place while other processes work to blur their boundaries.

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Khoirudin, Azaki, und Qaem Aulassyahied. „Reinterpreting Muhammadiyah’s Purification and Its Implications for the Educational Philosophy“. Progresiva : Jurnal Pemikiran dan Pendidikan Islam 12, Nr. 02 (07.12.2023): 161–78. http://dx.doi.org/10.22219/progresiva.v12i02.29596.

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This article mainly explores the changing and development of thought that occurred in one of the largest modernist Islamic organizations in Indonesia, Muhammadiyah, regarding Islamic purification. Using intellectual history as an approach, this research concluded that even though Muhammadiyah had purification as its main characteristic, in fact it had its own reinterpretation being extended and expanded. By implementing Abdolkarim Soroush’s theory of contraction and expansion of religious knowledge, this research found that in the very early days of its inception, Muhammadiyah constructed its concept of purification from the spiritualization, rationalization, and functionalization of Islamic teachings. But after the inception of Tarjih division in 1927, the purification in Muhammadiyah had a narrower orientation from worships and creeds (puritanism) to the muamalah of world affairs (ultra-puritanism). Beginning in 1995, there was a wider scope in which the Tarjih division in Muhammadiyah expanded its issues of worship to include public and humanitarian issues; that era was called post-puritanism. Based on the core hypothesis that any changes in religious thought have implications for educational orientation, from George R. Knight’s perspective, several educational implications are obtained: (1) In the early days of its inception, Muhammadiyah’s education implemented a progressivism philosophy that’s inspired by religion, rationality, and life; (2) when it comes to the narrower aspect of purification only for faith, worship, and muamalah, Muhammadiyah shifted its educational philosophy to perennialism-essentialism; (3) when the purification's meaning and interpretation expanded, Muhammadiyah tended its education toward the philosophy of reconstructionism.

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Guo, Zhimou, Yuansheng Xiao, Yanfang Liu, Tu Liang und Xinmiao Liang. „Purification of chitooligosaccharides by using purification factory“. Journal of Biotechnology 136 (Oktober 2008): S83. http://dx.doi.org/10.1016/j.jbiotec.2008.07.187.

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9

Malyovannyi, Myroslav, Galina Sakalova, Natalia Chornomaz und Oleh Nahurskyy. „Water Sorption Purification from Ammonium Pollution“. Chemistry & Chemical Technology 7, Nr. 3 (25.09.2013): 355–58. http://dx.doi.org/10.23939/chcht07.03.355.

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FANNES, M. „MULTI-STATE CORRELATIONS AND FIDELITIES“. International Journal of Geometric Methods in Modern Physics 09, Nr. 02 (März 2012): 1260021. http://dx.doi.org/10.1142/s0219887812600213.

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Correlations between states in a general quantum ensemble can be encoded in a Gram matrix that depends on a prescribed joint purification. This allows to establish an upper bound for the Holevo quantity χ. Optimizing over joint purifications is a hard problem. For small ensembles the connection with matrices of fidelities is investigated. General bounds are obtained for a linearized version of χ.

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11

Odiegwu C.N.C., Ukaejiofo E.O., Tothill I.E., Chianella I. und Okey-Onyesolu C.F. „Purification and Characterisation of Lectin Isolated from Nigeria Achatina achatina Snail.“ GSC Advanced Research and Reviews 5, Nr. 3 (30.12.2020): 001–9. http://dx.doi.org/10.30574/gscarr.2020.5.3.0095.

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Lectins are carbohydrate-binding proteins that are highly specific for sugar moieties of other molecules. They perform recognition on the cellular and molecular level and play numerous roles in biological recognition phenomena involving cells, carbohydrates, and proteins. Blood groups are inherited characters which give rise to antigen-antibody reaction. A total of 120 samples of local (Nigeria) Achatina achatina snail specie were collected, authenticated at the Zoology Department of the University of Nigeria, Nsukka and 80mls of pooled crude lectin extract was obtained. Purifications were performed on 20mls of the crude extract in three steps viz, Ammonium sulphate precipitation and Dialysis (Partial purifications), Con A Sepharose 4B affinity chromatography column (Complete purification). The affinity purified lectin was used for all the actual tests conducted in this research. The crude, partially and complete/affinity purified lectin extracts were subjected to Haemagglutination tests, Protein Assay and Specific Sugar determinations. The molecular weight was assessed by Sodium dodecyl sulphate polyacrylamide gel electrophoresis (SDS-PAGE) method. The results of the research showed as follows: On complete/affinity purification, 15mls of pure sample containing only the high molecular weight lectin was obtained. The respective haemagglutination tests on the crude, partially and affinity purified lectin showed on standardisation, preferential agglutination with Blood group A type. The Protein contents of the lectin was deduced to be as follows: The crude extract contains 13.5mg/dl, Dialysed precipitate – 5.7mg/dl, Dialysed supernatant – 5.0mg/dl and the Affinity purified Lectin – 0.422mg/dl. Galactose N-acetyl amine (Gal NAc) residue was determined to be its specific sugar. The SDS-PAGE analysis showed the molecular weight of the lectin to be 250 KDaltons. This research has therefore succeeded in the Purification, Characterisation and illustration of the lectinic properties of the local Nigeria snail - Achatina achatina.

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Wiwanitkit, Somsri, und Viroj Wiwanitkit. „Water purification“. AYU (An International Quarterly Journal of Research in Ayurveda) 33, Nr. 2 (2012): 317. http://dx.doi.org/10.4103/0974-8520.105261.

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13

Ward, William, und Gavin Swiatek. „Protein Purification“. Current Analytical Chemistry 5, Nr. 2 (01.04.2009): 85–105. http://dx.doi.org/10.2174/157341109787846171.

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14

Arenz, Christian, Daniel Burgarth, Vittorio Giovannetti, Hiromichi Nakazato und Kazuya Yuasa. „Lindbladian purification“. Quantum Science and Technology 2, Nr. 2 (26.04.2017): 024001. http://dx.doi.org/10.1088/2058-9565/aa6759.

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15

Weitzman, Jonathan B. „Proteome purification“. Genome Biology 3 (2002): spotlight—20020308–01. http://dx.doi.org/10.1186/gb-spotlight-20020308-01.

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16

Kalil, Andre C., und Marius C. Florescu. „Blood Purification“. Critical Care Medicine 41, Nr. 9 (September 2013): 2244–45. http://dx.doi.org/10.1097/ccm.0b013e318291cad5.

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17

Orsucci, Davide, Daniel Burgarth, Paolo Facchi, Hiromichi Nakazato, Saverio Pascazio, Kazuya Yuasa und Vittorio Giovannetti. „Hamiltonian purification“. Journal of Mathematical Physics 56, Nr. 12 (Dezember 2015): 122104. http://dx.doi.org/10.1063/1.4936311.

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18

Cook, K. G. „Protein purification“. FEBS Letters 271, Nr. 1-2 (01.10.1990): 248. http://dx.doi.org/10.1016/0014-5793(90)80419-j.

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19

Dixon, H. B. F. „Protein purification“. Trends in Genetics 4, Nr. 8 (August 1988): 238. http://dx.doi.org/10.1016/0168-9525(88)90158-8.

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Nice, E. „Protein purification“. TrAC Trends in Analytical Chemistry 10, Nr. 3 (März 1991): ix—x. http://dx.doi.org/10.1016/0165-9936(91)85083-4.

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21

Flett, Douglas S. „Solution purification“. Hydrometallurgy 30, Nr. 1-3 (Juni 1992): 327–44. http://dx.doi.org/10.1016/0304-386x(92)90092-e.

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22

Sugawara, Yukihiko. „Uto-Purification“. Architectural Design 78, Nr. 6 (November 2008): 70–71. http://dx.doi.org/10.1002/ad.773.

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23

Alves, Nathan J., William Cusick, Jared F. Stefanick, Jonathan D. Ashley, Michael W. Handlogten und Basar Bilgicer. „Functionalized liposome purification via Liposome Extruder Purification (LEP)“. Analyst 138, Nr. 17 (2013): 4746. http://dx.doi.org/10.1039/c3an00680h.

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Zeng, L., X. Wang, T. Wang und D. B. Kassel. „New developments in automated PrepLCMS extends the robustness and utility of the method for compound library analysis and purification“. Combinatorial Chemistry & High Throughput Screening 1, Nr. 2 (Juni 1998): 101–11. http://dx.doi.org/10.2174/138620730102220119153250.

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New developments in the high throughput purification of combinatorial libraries by automated preparative LC-MS is presented. To facilitate high speed purifications at the multimilligram level, short columns operated at ultra high flow rates were incorporated. In order to match the linear velocity of the short analytical columns for high speed separations (operated at 4.0 mL/min), it was required to operate the preparative columns at flow rates in excess of 70 mL/min. For chromatographically well-behaved compounds, analytical LC-MS analyses and preparative LC-MS analyses could be achieved in as little as 5 min. For compounds exhibiting poor chromatographic peak shapes and/or for compound mixtures requiring higher resolution separations, slightly longer preparative LC-MS analysis times were required (8-10 min/sample). <p> Fraction collection is based on mass-triggering (as opposed to UV triggering) is an exquisitely sesitive and selective technique for purifying combinatorial libraries. However, because of its inherent selectively ( i.e; only the predicted synthetic product is isolated), synthetic by-products or other explainable reaction products are ignoredduring the purification process. In some instances especially if the structure of these synthetic by- products is known ( or can be elucidated readily), these compounds might and should be isolated for biological testing as well, PreplCMS purifications in our laboratory have been achieved using Applescripting as a way to permit communication between the mass spectrometer and the fraction collector. This Applescript was modified to permit the input of up to four unique ( +/ or same ) masses in the data acquisition software to permit purification of up to four compounds from a single run. This was demonstrated for a combinatorial library synthesized in a microtiter plate and purified directly into a fraction collector containing four deep-well microtiter plates, making these purified microtiter plates amenable to direct biological screening.

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LAMBERTI, P. W., M. PORTESI und J. SPARACINO. „NATURAL METRIC FOR QUANTUM INFORMATION THEORY“. International Journal of Quantum Information 07, Nr. 05 (August 2009): 1009–19. http://dx.doi.org/10.1142/s0219749909005584.

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We study in detail a very natural metric for quantum states. This new proposal has two basic ingredients: entropy and purification. The metric for two mixed states is defined as the square root of the entropy of the average of representative purifications of those states. Some basic properties are analyzed and its relation to other distances is investigated. As an illustrative application, the proposed metric is evaluated for one-qubit mixed states.

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Mahdie, Muhammad Faisal, Violet Violet und Muhammad Helmi. „Rendement and Characteristics of Wood Vinegar Produced from Ironwood Delinquent Waste through Clay Kiln Charcoaling Furnace“. Journal of Wetlands Environmental Management 8, Nr. 2 (17.07.2020): 139. http://dx.doi.org/10.20527/jwem.v8i2.231.

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<p>The study aimed to determine the rendement of charcoal and wood vinegar and to identify wood vinegar chemical compounds made from ironwood deliquent waste. The study was carried out by using charcoaling facilities at the charcoaling center in the village of Asam – Asam. The charcoal and wood vinegar rendements were determined after ironwood delinquent waste was heated for 21 days with a temperature of approximately 400 - 600 ºC. The results showed that the rendement of the charcoal and wood vinegar were 14.02% and 0.05%, respectively. The research with wood vinegar characteristic before purification was pungent, however after purification, the results did not sting; color pH before purification was blackish-brown, however after purification it was pale brown yellow; the specific gravity before purification was 1.012 and after purification, it was 0.97; the pH before purification is 3.63 and after purification 3.41; and acid content before purification was 3.73% and after purification it was 3.66%. As a whole, the physics test of wood vinegar is categorized in Japan standard, however, the color only before purification is not standard. There are five chemical compounds identified in wood vinegar both before and after purification.</p>

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Hafrén, Anders, und Kristiina Mäkinen. „Purification of viral genome-linked protein VPg from potato virus A-infected plants reveals several post-translationally modified forms of the protein“. Journal of General Virology 89, Nr. 6 (01.06.2008): 1509–18. http://dx.doi.org/10.1099/vir.0.83649-0.

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In order to be able to analyse post-translational modifications and protein interactions of viral genome-linked protein VPg taking place during potato virus A (PVA) infection, an affinity tag-based purification system was developed by inserting a sequence encoding a six-histidine and haemagglutinin (HisHA) tag to the 3′ end of the VPg coding sequence within the infectious cDNA clone of PVA. The engineered virus was fully functional and the HisHA tag-encoding sequence remained stable in the PVA genome throughout the infection process. Purification under denaturing conditions resulted in a protein sample that contained multiple VPg and NIa forms carrying post-translational modifications that altered their isoelectric points. Non-modified tagged VPg (pI 8) was a minor product in the protein sample derived from total leaf proteins, but when the replication-associated membranes were used as starting material, its relative amount increased. Further characterization demonstrated that some of the PVA VPg isoforms were modified by multiple phosphorylation events. Purity of the proteins derived from the native purifications with either of the tags was evaluated. A clearly purer VPg sample was obtained by performing tandem affinity purification utilizing both tags sequentially. NIb, CI and HC-Pro co-purified in an affinity-tagged VPg-dependent manner, indicating that the system was able to isolate protein complexes operating during PVA infection.

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Kinoshita, Hidetoshi. „River water purification. The purification of Tama river water.“ Japan journal of water pollution research 12, Nr. 7 (1989): 413–16. http://dx.doi.org/10.2965/jswe1978.12.413.

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29

Boi, Cristiana. „Membrane adsorbers as purification tools for monoclonal antibody purification“. Journal of Chromatography B 848, Nr. 1 (März 2007): 19–27. http://dx.doi.org/10.1016/j.jchromb.2006.08.044.

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Vickers, Terry. „A microcomputer program for teaching enzyme purification protein purification“. Trends in Biochemical Sciences 13, Nr. 9 (September 1988): 363. http://dx.doi.org/10.1016/0968-0004(88)90109-0.

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Hu, Cheng Zhen, Yan Nan Cai, Jiang Wu, Bi Chen Yan, Xue Jun Qiu, Hai Ting He, Liu Liu Zhang und Yue Yu. „Study on Photocatalytic Technology with Photovoltaic-Thermal Integration and its Applications in Indoor Air Purification“. Advanced Materials Research 864-867 (Dezember 2013): 1360–63. http://dx.doi.org/10.4028/www.scientific.net/amr.864-867.1360.

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In terms of energy and environmental purification, application of photocatalytic purification in energy and environment is getting increasingly widespread. In the present paper, it focused on the applications of photocatalytic technology in indoor air purification. Photocatalyst and photocatalytic reaction devices are the two issues in photocatalytic air purification. Fe-La co-doped TiO2 was prepared, and integration of photovoltaic-thermal circular photocatalytic air purification reactor was designed, which showed high air purification efficiency. The experimental data and theoretical analysis gave the support to exploit new indoor air purification technologies. Further, technical and economic analysis on photocatalysis technology with photovoltaic-thermal integration applying in indoor air purification was studied and helpful results were attained.

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Qiao, Chunzhen, Ruijie Zhao, Jinxin Hao, Yuyi Pan, Yuzhe Tian und Nanyu Zhao. „Research on the influence of relative humidity on the purification efficiency of sponge activated carbon system purification system“. E3S Web of Conferences 520 (2024): 01025. http://dx.doi.org/10.1051/e3sconf/202452001025.

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An indoor air purification system coupled with adsorption and heat storage was designed based on a prefabricated building, which has the advantages of high purification efficiency, does not take up indoor space and does not require additional power consumption. It has been shown that the relative humidity has a significant impact on the purification effect of particulate matter. Using sponge activated carbon as adsorption material, the effect of different relative humidity on the purification efficiency of PM2.5 and PM10 was experimentally studied, and the purification effect of the purification system on PM2.5 and PM10 under various relative humidity conditions was analyzed. The results show that in the relative humidity interval of 20%-70%, with the increase of relative humidity, the sponge activated carbon purification system shows an increasing trend in the purification efficiency of PM2.5, and the effect on the purification efficiency of PM10 is not obvious.

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Giammarchi, Marco. „Water purification in Borexino“. International Journal of Modern Physics A 29, Nr. 16 (17.06.2014): 1442008. http://dx.doi.org/10.1142/s0217751x14420081.

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Water Purification is often an important methodological tool in low radioactivity experiments. A variety of techniques have been exploited in the frame of the Borexino experiment to the goal of using water as a high purity shielding and as a reagent for cleaning and purification processes. This paper describes the water purification strategies and the purification results obtained in Borexino.

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Cunningham, Mary. „Purification in Plato’s Symposium“. Epoché: A Journal for the History of Philosophy 25, Nr. 2 (2021): 339–47. http://dx.doi.org/10.5840/epoche2021527181.

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Scholars often take purification (κάθαρσις) to be a concept that persists the same throughout Plato’s dialogues. Generally, they take it to mean the separation of the soul from the body, picking up on Socrates’s account at Phaedo 67c–d. I do not find that this account of purification endures throughout the dialogues. In this paper, I argue that in Symposium Diotima describes purification differently. I argue that her account of purification emphasizes preparedness for encountering the forms, not the eradication of the corporeal. I present this account in three steps. First, I discuss Diotima’s lower and higher mysteries, focusing on the lower mysteries. Next, I examine Diotima’s use of the Eleusinian mysteries as an analogy for her own mysteries. Here, I overview the historical rites at Agrai and the Eleusinian Mysteria. I argue that, mirroring the Agrai rites, Diotima’s lower mysteries are purificatory, and therefore provide an account of purification. Finally, I explain the account of purification Diotima presents in the lower mysteries as the desire to possess the deathless deathlessly. Diotima’s account of purification is importantly distinct from the Phaedo account. In the former, the separation of the soul from the body is in no way important for purification. We must confront the discrepancies between these accounts and recognize that purification is not a doctrine that persists throughout the dialogues.

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Amalia, Adinda Putri, Ambar Pertiwiningrum und Nanung Agus Fitriyanto. „The Effect of The Combination of Zeolite and Activated Biochar-Based Sugarcane Bagasse on The Increase of CH₄ in Biogas with A Different Time Variation“. IOP Conference Series: Earth and Environmental Science 1111, Nr. 1 (01.12.2022): 012055. http://dx.doi.org/10.1088/1755-1315/1111/1/012055.

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Abstract This study aimed to determine the effect of variation in biogas purification time on methane (CH4) content, heating value, and combustion efficiency. The statistical analysis used was a one-way ANOVA analysis. The purification used activated bagasse biochar and zeolite. The variations of purification time were divided into three treatments, which are 10 minutes, 20 minutes, and 30 minutes. The contents of CH4 in biogas with purification times, respectively, were 281201,45 ppm, 313563,05 ppm, and 339112,92 ppm. The biogas field heat value results with purification times were 242.79 kJ, 248.37 kJ, and 255.35 kJ. The biogas’ heat value with purification time was 515.60 kJ, 890.07 kJ, and 849.50 kJ. The results of combustion efficiency with purification times of 10 minutes, 20 minutes, and 30 minutes, respectively, were 47,95%, 28,20%, and 30,84%. Based on the results, it can be concluded that biogas purification using a combination of activated bagasse biochar and zeolite absorbent with different purification times has better values than biogas purification using an adsorbent not activated. It can increase the CH4 content in biogas and biogas field heat value, but it reduces the heat value and biogas combustion efficiency due to incomplete combustion.

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Yao, Guang Tao, Heng Wu, Zi Rong Guo, Da Hai Jiang und Hong Wei Liu. „Research on Purification Performance of Diesel Exhausts Four-Effect Catalytic Purification System“. Applied Mechanics and Materials 385-386 (August 2013): 527–31. http://dx.doi.org/10.4028/www.scientific.net/amm.385-386.527.

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A test methodwas designed to evaluate the purification performance of Diesel exhausts four-effect catalytic purification system which was based on the oxidation catalyst, NOx reduction catalyst and carbon particles combustion catalyst.Then the method was usedto test the purification performance of a four-effect catalytic purification systemconsist of DOC,CDPF andSCR. The results of the test show that, with the use of the four-effect catalytic purification system, the combustion T50of the soot can reach 330 ~ 400 °C which shows that the combustion of the soot has been catalyzed effectively.The rate of the deoxidized NO can achieve 90% abovewhich shows thatthe selective deoxidation of the NOx has been catalyzed effectively.

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Li, Shilin, Yuelong Bai, Zhifeng Zhang und Long Jiang. „Effects of Vacuum-Stirring Purification Process on Al-6Mg Alloy Melt“. Crystals 12, Nr. 5 (08.05.2022): 675. http://dx.doi.org/10.3390/cryst12050675.

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Aiming for hydrogen and oxidation easily produced in the melting process of Al-Mg alloys, three processes, including non-vacuum static melt treatment, non-vacuum rotary-injection purification and vacuum-stirring purification, were used to purify the Al-6Mg alloy melt. The hydrogen content and inclusion content were studied by means of the solid-state hydrogen measurement method, reduced pressure test method, FESEM and EDS. The results show that the purification effect of vacuum-stirring purification is better than that of the non-vacuum static melt treatment and non-vacuum rotary-injection purification. The hydrogen content of the melt decreases from 0.48 mL/100 gAl in the non-vacuum static treatment, to 0.32 mL/100 gAl in the non-vacuum rotary-injection purification process and to 0.10 mL/100 gAl in the vacuum-stirring purification process. The inclusion content of the melt decreases from 2.6% in the non-vacuum static treatment to 0.69% in the non-vacuum rotary-injection purification process, and to 0.39%, in the vacuum-stirring purification process.

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Wieland, Andreas, Christian F. Durach, Joakim Kembro und Horst Treiblmaier. „Statistical and judgmental criteria for scale purification“. Supply Chain Management: An International Journal 22, Nr. 4 (12.06.2017): 321–28. http://dx.doi.org/10.1108/scm-07-2016-0230.

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Purpose “Scale purification” – the process of eliminating items from multi-item scales – is widespread in empirical research, but studies that critically examine the implications of this process are scarce. The goals of this research are threefold: to discuss the methodological underpinning of scale purification, to critically analyze the current state of scale purification in supply chain management (SCM) research and to provide suggestions for advancing the scale-purification process. Design/methodology/approach A framework for making scale-purification decisions is developed and used to analyze and critically reflect on the application of scale purification in leading SCM journals. Findings This research highlights the need for rigorous scale-purification decisions based on both statistical and judgmental criteria. By applying the proposed framework to the SCM discipline, a lack of methodological rigor and coherence is identified when it comes to current purification practices in empirical SCM research. Suggestions for methodological improvements are provided. Research limitations/implications The framework and additional suggestions will help to advance the knowledge about scale purification. Originality/value This paper demonstrates that the justification for scale purification needs to be driven by reliability, validity and parsimony considerations, and that this justification needs to be based on both statistical and judgmental criteria.

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Fu, Jun, Jianxing Li, Wei Chen, Zengfeng Zhang, Hong Mao und Yuan Tang. „Performance study of the exhaust purification muffler of a diesel engine“. Multidiscipline Modeling in Materials and Structures 12, Nr. 4 (14.11.2016): 635–47. http://dx.doi.org/10.1108/mmms-04-2016-0017.

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Purpose The purpose of this paper is to present experimental studies on the designed muffler which contains ceramic foam and has the integration function of purification and noise elimination. Design/methodology/approach Comparative tests were done on a diesel engine with no muffler, the original muffler and the purification muffler. The soot index (light absorption coefficient), A-weighted sound pressure level and fuel consumption rate, which were collected by the partial flow opacity method, the insertion loss measurement of spatial five points and the load characteristics tests, respectively, and the effects of purification and noise elimination were studied. Findings The results of this paper state that the purification muffler shows great improvement on exhaust soot purification and noise elimination. The variation in diesel fuel consumption rate was small, the sound pressure level of purification muffler was reduced by 6 to 10 dB, the insertion loss of the purification muffler was increased by 6.41 dB and the average light absorption coefficient decreased by 57.8 percent compared with the original muffler. Originality/value The value of this study is that it supplies a purification muffler which contains a ceramic foam. Under the prerequisite of little effect on the fuel economy of diesel engine, the purification muffler shows great improvement in exhaust soot purification and noise elimination.

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Zhou, Yijun, Ryan P. McNamara und Dirk P. Dittmer. „Purification Methods and the Presence of RNA in Virus Particles and Extracellular Vesicles“. Viruses 12, Nr. 9 (21.08.2020): 917. http://dx.doi.org/10.3390/v12090917.

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The fields of extracellular vesicles (EV) and virus infections are marred in a debate on whether a particular mRNA or non-coding RNA (i.e., miRNA) is packaged into a virus particle or copurifying EV and similarly, whether a particular mRNA or non-coding RNA is contained in meaningful numbers within an EV. Key in settling this debate, is whether the purification methods are adequate to separate virus particles, EV and contaminant soluble RNA and RNA:protein complexes. Differential centrifugation/ultracentrifugation and precipitating agents like polyethylene glycol are widely utilized for both EV and virus purifications. EV are known to co-sediment with virions and other particulates, such as defective interfering particles and protein aggregates. Here, we discuss how encased RNAs from a heterogeneous mixture of particles can be distinguished by different purification methods. This is particularly important for subsequent interpretation of whether the RNA associated phenotype is contributed solely by virus or EV particles or a mixture of both. We also discuss the discrepancy of miRNA abundance in EV from different input material.

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Pereira, Roberto Guimarães, und Fernanda Arenásio Benites Alves de Souza. „Purification and characterization of glycerin obtained from soybean biodiesel production“. Revista Ibero-Americana de Ciências Ambientais 10, Nr. 3 (17.07.2019): 252–62. http://dx.doi.org/10.6008/cbpc2179-6858.2019.003.0022.

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The crude glycerin is a raw material which can be applied in a wide range of products, even with all its impurities, without the need for purification. However, the purification processes allow a wider application, making it more salable. With increasing demand for biodiesel, a glycerin excess is being released to the market. Therefore, the search for alternative treatments for the glycerin derived from the biodiesel production process is of utmost importance, ensuring biofuel production flow. This paper presents glycerin purification experiments done in a crude glycerin (64.44% of glycerol) obtained from the soybean biodiesel production, which was subjected to pre-purification process, purification with activated carbon and by ion exchange process. After the purification process the glycerin sample was characterized and compared with commercially used glycerin. The highest content of glycerol achieved was 94.22% corresponding to the steps of: pre-purification process (washing, acidification, separation, neutralization, salting-outing and evaporation); purification with activated carbon and by ion exchange process with mixed resin.

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Zaleska, Adriana, Andreas Hanel und Michal Nischk. „Photocatalytic Air Purification“. Recent Patents on Engineering 4, Nr. 3 (01.11.2010): 200–216. http://dx.doi.org/10.2174/187221210794578637.

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Gołofit, Tomasz, und Paweł Maksimowski. „Purification of Hexabenzylhexaazaisowurtzitane“. Central European Journal of Energetic Materials 13, Nr. 4 (20.12.2016): 1038–50. http://dx.doi.org/10.22211/cejem/67428.

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Igumnov, Sergey N., Vladimir N. Kulagin und Tatyana B. Korneeva. „Purification of Acetonitrile“. Advanced Materials Research 560-561 (August 2012): 202–6. http://dx.doi.org/10.4028/www.scientific.net/amr.560-561.202.

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The procedure is described for the purification of acetonitrile to a level suitable for spectroscopic and chromatographic work. Rectification of chemical pretreated acetonitrile was performed on glass vacuum-jacketed column, filled with spiral-prismatic packing.

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Pagès, Yves. „la purification laïque“. Vacarme 12, Nr. 2 (2000): 43. http://dx.doi.org/10.3917/vaca.012.0043.

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Bonetto, R., E. Arany, E. D. Castillo und J. Uranga. „Purification of Glomerulopressin“. Experimental Biology and Medicine 186, Nr. 2 (01.11.1987): 240–45. http://dx.doi.org/10.3181/00379727-186-42610.

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TASE, C. „Acute Blood Purification“. JAPANES JOURNAL OF MEDICAL INSTRUMENTATION 64, Nr. 8 (01.08.1994): 374–77. http://dx.doi.org/10.4286/ikakikaigaku.64.8_374.

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Chiche, D., C. Diverchy, A. C. Lucquin, F. Porcheron und F. Defoort. „Synthesis Gas Purification“. Oil & Gas Science and Technology – Revue d’IFP Energies nouvelles 68, Nr. 4 (Juli 2013): 707–23. http://dx.doi.org/10.2516/ogst/2013175.

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Tominaga, A., S. Kawano und Y. Narahara. „Rapid purification of3He“. Journal of Physics D: Applied Physics 22, Nr. 8 (14.08.1989): 1020–24. http://dx.doi.org/10.1088/0022-3727/22/8/002.

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Armington, A. F. „STANDARD PURIFICATION TECHNIQUES*“. Annals of the New York Academy of Sciences 118, Nr. 16 (16.12.2006): 613–17. http://dx.doi.org/10.1111/j.1749-6632.1965.tb40732.x.

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