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Journal articles on the topic 'Purity'

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Author: Grafiati

Published: 4 June 2021

Last updated: 11 March 2023

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1

Chen, Ting Yi, Wen Lu, Wei Liu, Ya Dian Xie, and Ye Qi Fu. "Preparation of Purity Al₂O₃for LED Sapphire Materials by Ammonium Aluminum Sulfate and its Performance." Advanced Materials Research 1053 (October 2014): 50–55. http://dx.doi.org/10.4028/www.scientific.net/amr.1053.50.

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The preparation of aluminium sulfate adopting the sulfuric acid heating method with Al (OH)3 as raw material, and join the β complexing agent in aluminium sulfate solution to remove impurities; ammonium aluminum sulfat is prepared by the reaction of the ammonium solution and aluminum sulfate, and purify ammonium aluminum sulfate to get high purity ammonium aluminum sulfate crystals containing crystal water. Purify the crystallization of ammonium aluminum sulfate with containing water treated at 1250 °C for 3 h. Then the high purity alumina was prepared. Break the high purity alumina to press, and then again process in 3 h under 1650 °C, get Al203 which is craw materials of sapphire crystal LED. The samples were characterized by atomic absorption spectrum (AAS), differential thermal analysis (TG/DTA), scanning electron microscopy, XRD and chemical analysis. The purity of high purity alumina is 99.991%, which will be applied to the LED manufacturers on sapphire artificial sapphire growth test.

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2

Merriwether, D. Andrew. "Purity." Anthropology News 38, no. 8 (November 1997): 2. http://dx.doi.org/10.1111/an.1997.38.8.2.1.

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3

Cottom, Daniel. "Purity." Critical Inquiry 16, no. 1 (October 1989): 173–98. http://dx.doi.org/10.1086/448530.

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4

Ageldinov, R. A., A. I. Levashova, V. S. Kokhan, and M. S. Nesterov. "Methodical aspects of lipopolysaccharides obtaining and characterization from Escherichia coli cells." Journal Biomed 17, no. 3E (October 26, 2021): 14–16. http://dx.doi.org/10.33647/2713-0428-17-3e-14-16.

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In this study, a procedure was applied to purify lipopolysaccharides from Escherichia coli based on a hot phenolic extraction protocol. The purity of the extracted lipopolysaccharides was assessed by HPLC-UV. Pyrogenic activity was determined using the Limulus Amebocyte Lysate test and used to monitor the functionality of the purified lipopolysaccharides. HPLC analysis showed a high degree of purity comparable to commercial lipopolysaccharide. Pyrogenic activity confirmed the functional activity of purified lipopolysaccharides. The presented protocol can be used to isolate lipopolysaccharides with high purity and functional activity.

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5

Zhang, Yajing, Zirui Zhao, Wenlong Li, Yuanhu Tang, Huiwen Meng, and Shujie Wang. "Purification of Two Taxanes from Taxus cuspidata by Preparative High-Performance Liquid Chromatography." Separations 9, no. 12 (December 16, 2022): 446. http://dx.doi.org/10.3390/separations9120446.

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In the present study, an effective method of preparative high-performance liquid chromatography (Prep-HPLC) was established to purify two taxanes in Taxus cuspidata. During the experimental operation, the effects of flow rate, injection volume, and column temperature on the purity of 10-deacetyltaxol (10-DAT) and paclitaxel (PTX) were investigated, and the optimized conditions were as follows: flow rate of 10 mL/min, injection volume of 0.5 mL, and column temperature of 30 °C. Under these conditions, the purity of 10-DAT and PTX reached 95.33% and 99.15%, respectively. The purified products were characterized by scanning electron microscopy (SEM), high-performance liquid chromatography (HPLC), and electrospray ionization-high resolution mass spectrometry (ESI-HRMS). The results demonstrated that preparative HPLC can effectively purify 10-DAT and PTX from Taxus cuspidata with a purity of >95%, which was suitable for the large-scale preparation of 10-DAT and PTX.

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6

Pandey, Ashok Kumar, and Manoj Pathak. "M-purity and torsion purity in modules." International Journal of Algebra 7 (2013): 421–27. http://dx.doi.org/10.12988/ija.2013.3547.

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7

Nord, Deborah Epstein, and Lucy Bland. "Purity Supreme?" Women's Review of Books 13, no. 3 (December 1995): 25. http://dx.doi.org/10.2307/4022347.

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8

Ward, Tara. "4.2 Purity." Excursions Journal 10, no. 2 (December 30, 2020): 67–85. http://dx.doi.org/10.20919/exs.10.2020.302.

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9

Chris, Cynthia. "Censoring Purity." Camera Obscura: Feminism, Culture, and Media Studies 27, no. 1 (2012): 97–125. http://dx.doi.org/10.1215/02705346-1533457.

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10

Sered, Susan Starr. "Purity (review)." Nashim: A Journal of Jewish Women's Studies & Gender Issues 7, no. 1 (2004): 263–65. http://dx.doi.org/10.1353/nsh.2004.0057.

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11

Rice, Jeff. "Professional Purity." Journal of Business and Technical Communication 30, no. 2 (December 16, 2015): 236–61. http://dx.doi.org/10.1177/1050651915620234.

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12

Giner-Sorolla, Roger, and Hanah A. Chapman. "Beyond Purity." Psychological Science 28, no. 1 (December 8, 2016): 80–91. http://dx.doi.org/10.1177/0956797616673193.

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13

Rajgor, Gail. "Sustainable purity." Refocus 5, no. 4 (July 2004): 60–61. http://dx.doi.org/10.1016/s1471-0846(04)00195-7.

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14

Graham, Irene. "Purity postponed." Index on Censorship 29, no. 4 (July 2000): 153–55. http://dx.doi.org/10.1080/03064220008536780.

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15

Florén, Ingrid. "Viscoelastic Purity." Journal of Cataract & Refractive Surgery 24, no. 2 (February 1998): 145–46. http://dx.doi.org/10.1016/s0886-3350(98)80185-5.

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16

Doolen, Nicole B. "Purity Balls." Stance: An International Undergraduate Philosophy Journal 9 (2016): 73–83. http://dx.doi.org/10.5840/stance201699.

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17

Doolen, Nicole B. "Purity Balls." Stance: an international undergraduate philosophy journal 9, no. 1 (September 5, 2019): 73–83. http://dx.doi.org/10.33043/s.9.1.73-83.

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In this paper, I draw on the principles of Aristotelianethics, the work of modern virtue ethicists, and previous feministcritiques of purity balls to interrogate the effects of this practiceon moral development. I argue that purity balls discourage youngwomen from making autonomous, informed, and virtuouslymotivated decisions regarding their sexuality. While most critiquesof purity balls are rooted in the explicitly patriarchal structure ofthese events, my analysis emphasizes the negative impact they haveon moral agency. I conclude that purity balls are unethical becauseof the detrimental effects they have on the becoming of virtuousagents.

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18

Laffling, John. "Ideological Purity." Target. International Journal of Translation Studies 6, no. 1 (January 1, 1994): 81–94. http://dx.doi.org/10.1075/target.6.1.08laf.

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19

Montagnon, B. "Vaccine Purity." Bio/Technology 4, no. 11 (November 1986): 1022. http://dx.doi.org/10.1038/nbt1186-1022b.

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20

Dorman, Anke. "“They Shall Purify Themselves”: Essays on Purity in Early Judaism." Journal for the Study of Judaism 42, no. 3 (2011): 404–5. http://dx.doi.org/10.1163/157006311x586458.

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21

Nagy, Gabe, Tianyuan Peng, Daniel E. K. Kabotso, Milos V. Novotny, and Nicola L. B. Pohl. "Protocol for the purification of protected carbohydrates: toward coupling automated synthesis to alternate-pump recycling high-performance liquid chromatography." Chemical Communications 52, no. 90 (2016): 13253–56. http://dx.doi.org/10.1039/c6cc07584c.

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22

Li, Jiahui, Yangfeng Wang, Xuehua He, Qing Sun, Meichai Xiong, Zichong Chen, Chengfu Zeng, Xiaohua Zheng, and Chu Liang. "A facile and universal method to purify silica from natural sand." Green Processing and Synthesis 11, no. 1 (January 1, 2022): 907–14. http://dx.doi.org/10.1515/gps-2022-0079.

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Abstract The major constituents of sand are silica and silicates. The facile and low-cost purification technology of silica from natural sand is of magnificent importance to the industrial applications of silicon-based materials. Herein, we report a green, low-cost, and universal method to purify silica from natural sand. Sand from deserts, rivers, and seas is selected as the representative of natural sand. The initial purity of silica is 52.1 wt% for desert sand, 39.3 wt% for river sand, and 35.8 wt% for sea sand. High-purity silica has been successfully separated and purified from natural sand via ball milling, reacting with 30 bar CO2 and hydrochloric acid. The purity of silica derived from natural sand reaches >96 wt%. In this work, the mechanism for the purification of silica from natural sand is discussed. This study provides a new method to separate high-purity silica from natural sand without the generation of toxic and harmful substances.

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23

Østebø, Terje. "African Salafism: Religious Purity and the Politicization of Purity." Islamic Africa 6, no. 1-2 (July 6, 2015): 1–29. http://dx.doi.org/10.1163/21540993-00602005.

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There is much ambiguity in terms of how Salafism is understood as an empirical phenomenon and how it is used as an analytical concept. This is partly because it often occurs rather uncritically in the media and in public discourses, but also due to the fact that Salafism represents a phenomenon encompassing a broad range of issues. This paper gives an overview over features and trends inherent in what I call African Salafism, focusing on issues such as the role of African agency, quests for religious purity, and processes of politicization of purity. The concept of African Salafism is obviously not unproblematic, as it may give the impression that we are dealing with a phenomenon that can neatly be delineated, and that it is characterized by a certain set of features making it distinct from other forms. It is important to recognize that African Salafism signifies the representation of Salafism on the African continent, as something shaped by African realities, and which obviously would contain significant local varieties.

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24

Suzuki, Toshihiro, and Akiharu Hioki. "Gravimetric analysis of high purity tellurium for purity evaluation." Analytica Chimica Acta 555, no. 2 (January 2006): 391–94. http://dx.doi.org/10.1016/j.aca.2005.09.028.

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25

Karelin, M. "Purity-bounded uncertainty relations in multidimensional space—generalized purity." Journal of Physics A: Mathematical and General 38, no. 28 (June 29, 2005): 6393–403. http://dx.doi.org/10.1088/0305-4470/38/28/012.

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26

Taixing, Yang, Guo Lequn, Zhang Zhong, and Gu Mingguang. "Comparison between varietal purity and zymogram purity in maize." Chinese Science Bulletin 43, no. 11 (June 1998): 930–35. http://dx.doi.org/10.1007/bf02884616.

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27

Zhang, Xing-Jie, Ting-Ting Wang, Yu-Kun Pu, Lin Zeng, Rui-Han Zhang, Xiao-Li Li, Xu Ji, and Wei-Lie Xiao. "Optimized Expression of Recombinant Human NIMA-Related Kinase 7 (NEK7) with A Higher Purity in Escherichia coli." Protein & Peptide Letters 28, no. 12 (December 2021): 1391–97. http://dx.doi.org/10.2174/0929866528666211118092410.

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Background: NIMA (never in mitosis, gene A) serine/threonine kinase 7 (NEK7) is a regulator of mitosis spindle in mammals and is considered as a drug target of inflammasome related inflammatory diseases. However, most commercially available or reported recombinant NEK7 proteins are either inactive or have low purity. These shortcomings limit the pharmacological studies and development of NEK7 inhibitors. Objective: To elucidate what causes the NEK7 low purity in E. coli, and optimize a protocol to improve the protein purity. Methods: A comparative study of expression full length NEK7 with an N-terminal His-tag or a Cterminal His-tag was performed. His-affinity resin, ion exchange and gel filtration chromatography were used to purify NEK7. The protein was identified by mass spectrometry. The activity and folding of NEK7 were evaluated by chemiluminescent assay and thermal shift assay. Results: Our results demonstrated that N-terminal tagged protein was toxic to E. coli, resulting in incomplete translated products. The C-terminal tagged NEK7-His6 had a much higher purity than that of an N-terminal tag. The Ni2+ resin one-step purification led to a purity of 91.7%, meeting the criteria of most kinase assays. With two-step and three-step procedures, the protein purities were 94.7% and ~100%, respectively. The NEK7 purified in this work maintained its kinase activity and correct conformation, and the compound-protein interaction ability. Conclusion: Our optimized protocol could produce good purity of His tagged NEK7 in E. coli, and the kinase activity and biophysical characteristics of which are preserved.

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28

Zong, Linqi, Bin Zhu, Zhenda Lu, Yingling Tan, Yan Jin, Nian Liu, Yue Hu, Shuai Gu, Jia Zhu, and Yi Cui. "Nanopurification of silicon from 84% to 99.999% purity with a simple and scalable process." Proceedings of the National Academy of Sciences 112, no. 44 (October 19, 2015): 13473–77. http://dx.doi.org/10.1073/pnas.1513012112.

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Silicon, with its great abundance and mature infrastructure, is a foundational material for a range of applications, such as electronics, sensors, solar cells, batteries, and thermoelectrics. These applications rely on the purification of Si to different levels. Recently, it has been shown that nanosized silicon can offer additional advantages, such as enhanced mechanical properties, significant absorption enhancement, and reduced thermal conductivity. However, current processes to produce and purify Si are complex, expensive, and energy-intensive. Here, we show a nanopurification process, which involves only simple and scalable ball milling and acid etching, to increase Si purity drastically [up to 99.999% (wt %)] directly from low-grade and low-cost ferrosilicon [84% (wt %) Si; ∼$1/kg]. It is found that the impurity-rich regions are mechanically weak as breaking points during ball milling and thus, exposed on the surface, and they can be conveniently and effectively removed by chemical etching. We discovered that the purity goes up with the size of Si particles going down, resulting in high purity at the sub–100-nm scale. The produced Si nanoparticles with high purity and small size exhibit high performance as Li ion battery anodes, with high reversible capacity (1,755 mAh g−1) and long cycle life (73% capacity retention over 500 cycles). This nanopurification process provides a complimentary route to produce Si, with finely controlled size and purity, in a diverse set of applications.

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29

Tian, Yuan, Xiaopan Zhang, Tao Qu, Fei Lyu, Hao Du, Lei Shi, Bin Yang, and Yongnian Dai. "Technical research on vacuum distillation to purify magnesium to 99.99% purity." Materials Research Express 8, no. 5 (May 1, 2021): 056506. http://dx.doi.org/10.1088/2053-1591/abdf12.

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30

Kluszczyńska, Katarzyna, Liliana Czernek, Wojciech Cypryk, Łukasz Pęczek, and Markus Düchler. "Methods for the Determination of the Purity of Exosomes." Current Pharmaceutical Design 25, no. 42 (January 7, 2020): 4464–85. http://dx.doi.org/10.2174/1381612825666191206162712.

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Background: Exosomes open exciting new opportunities for advanced drug transport and targeted release. Furthermore, exosomes may be used for vaccination, immunosuppression or wound healing. To fully utilize their potential as drug carriers or immune-modulatory agents, the optimal purity of exosome preparations is of crucial importance. Methods: Articles describing the isolation and purification of exosomes were retrieved from the PubMed database. Results: Exosomes are often separated from biological fluids containing high concentrations of proteins, lipids and other molecules that keep vesicle purification challenging. A great number of purification protocols have been published, however, their outcome is difficult to compare because the assessment of purity has not been standardized. In this review, we first give an overview of the generation and composition of exosomes, as well as their multifaceted biological functions that stimulated various medical applications. Finally, we describe various methods that have been used to purify small vesicles and to assess the purity of exosome preparations and critically compare the quality of these evaluation protocols. Conclusion: Combinations of various techniques have to be applied to reach the required purity and quality control of exosome preparations.

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31

Hendriks, Frank. "Purity and Democracy." Administrative Theory & Praxis 33, no. 1 (March 2011): 44–61. http://dx.doi.org/10.2753/atp1084-1806330102.

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32

Berns-McGown. "Purity in Danger." Transition, no. 120 (2016): 95. http://dx.doi.org/10.2979/transition.120.1.11.

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33

Davis, Alex, and Trevor Joyce. "Purity and Dirt." Irish Review (1986-), no. 22 (1998): 114. http://dx.doi.org/10.2307/29735899.

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34

Rafter, Kevin, and Richard English. "Purity and Peace." Irish Review (1986-), no. 32 (2004): 132. http://dx.doi.org/10.2307/29736261.

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35

Campbell, Jonathan G. "The Purity Texts." Journal of Jewish Studies 56, no. 2 (October 1, 2005): 341–43. http://dx.doi.org/10.18647/2624/jjs-2005.

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36

KOSUGE, Harumi. "High purity aluminum." Journal of Japan Institute of Light Metals 38, no. 4 (1988): 238–48. http://dx.doi.org/10.2464/jilm.38.238.

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37

KOSUGE, Harumi. "Commercial purity aluminum." Journal of Japan Institute of Light Metals 38, no. 5 (1988): 292–308. http://dx.doi.org/10.2464/jilm.38.292.

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38

Cunningham, Oscar, and Chris Heunen. "Purity through Factorisation." Electronic Proceedings in Theoretical Computer Science 266 (February 27, 2018): 315–28. http://dx.doi.org/10.4204/eptcs.266.20.

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39

Houlton, Thomas. "Purity: Conference Abstracts." Excursions Journal 4, no. 2 (January 24, 2020): 4–25. http://dx.doi.org/10.20919/exs.4.2013.176.

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40

Voges, Nick. "The Purity Ball." Colorado Review 36, no. 1 (2009): 3–29. http://dx.doi.org/10.1353/col.2009.0029.

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41

Paulson, Stanley L. "The Purity Thesis." Ratio Juris 31, no. 3 (September 2018): 276–306. http://dx.doi.org/10.1111/raju.12217.

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42

Baskin, Judith Reesa. "Purity (Tehora) (review)." NWSA Journal 16, no. 2 (2004): 206–8. http://dx.doi.org/10.1353/nwsa.2004.0045.

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43

HUNT, ALAN. "The Purity Wars:." Theoretical Criminology 3, no. 4 (November 1999): 409–36. http://dx.doi.org/10.1177/1362480699003004002.

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44

Elmore, D. T. "Purity of nature?" Nature 361, no. 6413 (February 1993): 598. http://dx.doi.org/10.1038/361598c0.

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45

Pleasants, Simon. "High-purity diamond." Nature Photonics 7, no. 12 (November 28, 2013): 939. http://dx.doi.org/10.1038/nphoton.2013.335.

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46

Diaz, Joanne. "The Purity Instinct." Massachusetts Review 58, no. 4 (2017): 677. http://dx.doi.org/10.1353/mar.2017.0103.

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47

Lindahl, Elisabeth, Fredricka Gilje, and Astrid Norberg. "Striving for Purity." Journal of Holistic Nursing 22, no. 4 (December 2004): 333–50. http://dx.doi.org/10.1177/0898010104269243.

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48

Hofmeyr, Isabel. "‘Wailing for purity’." African Studies 54, no. 2 (January 1995): 16–31. http://dx.doi.org/10.1080/00020189508707827.

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49

Rose-Ackerman, Susan. "Corruption & Purity." Daedalus 147, no. 3 (July 2018): 98–110. http://dx.doi.org/10.1162/daed_a_00505.

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Corruption is a complex and contested concept that raises difficult ethical and legal issues at the borderline between individuals’ public and private roles. What is appropriate or required in one role may be inappropriate or even illegal in another. Based on these concepts of role and responsibility, I begin this essay by analyzing three cases that fit comfortably into the “illegal corruption” category: so-called grand and petty corruption and electoral fraud. These categories express widely accepted boundaries at the interface between public power and private wealth. I then discuss more ambiguous cases, such as lobbying and campaign finance, that demand nuanced legal and policy solutions. Responses to both types of behavior must go beyond law enforcement to include the reorganization of government institutions and their relationship to the private sector.

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50

Gil, José J., and Ignacio San José. "3D polarimetric purity." Optics Communications 283, no. 22 (November 2010): 4430–34. http://dx.doi.org/10.1016/j.optcom.2010.04.090.

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