Relevant bibliographies by topics / Surface active agents – Research

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Surface active agents – Research'

Author: Grafiati
Published: 4 June 2021
Last updated: 7 February 2022

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Journal articles on the topic "Surface active agents – Research"

1

Niu, Wei, Zhong An Jiang, and Ju Shi Chen. "Research on Optimal Formula of Dustfall Agent to Remove Blasting Smoke." Advanced Materials Research 534 (June 2012): 298–303. http://dx.doi.org/10.4028/www.scientific.net/amr.534.298.

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In order to reduce dust produced during the blasting, effective measures according to smoke components and properties are required to be taken. The experiment adopted a number of base materials and surface-active agents to reduce the dust in smoke. Besides, corresponding additives were adopted to reduce poisonous and harmful gases during the blasting. Experiments focused on wettability and surface tension, using contrast experiment to determine optimal base material and surface-active agent, and also studied the influence of additives on their performance. The experimental results suggested that： sodium chloride was the optimal base material, sodium dodecyl benzene sulfonate was the optimal surface-active agent, and copper sulphate and ammonium chloride as additives had almost no influence on performance of surface-active agent and base material. Therefore, adding this dustfall agent to the water bag during the blasting can effectively reduce the concentration of smoke.
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Cui, Wei Lin, Wu Ju Xu, and Ling Jian Song. "The Influence of Different Kinds of Surfactants on Rheology in Polymer/Surfactant Complex Flooding." Applied Mechanics and Materials 437 (October 2013): 1089–92. http://dx.doi.org/10.4028/www.scientific.net/amm.437.1089.

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Because of alkaline declining the sweep efficiency, causing scale formation problem in the reservoir and the well bottom and the tubular pipes, so polymer/surfactant compound flooding technology is the emphasis in the research of enhanced recovery. So the articles study the regulation of different kinds of surface active agents at different temperature by MARS Rheometer. The testing result showed that the variation of viscocity under the interaction between the surface active agent and association polymer according to “three stage” model .The linear viscoelastic region of stress decrease when different surface active agents are put into polymer liquor, and the higher frequency, the better elasticity of polymer liquor. The hydrophobic association between the surface active agents and polymer decrease with a higher temperature, but the ionic surfactant is aggravate. The systematic study of binary system rheology can contribute to correctly understand and apply binary system.
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Du, Bing Xin, and Kun Huang. "The Research on Comprehensive Utilization of Phosphogypsum." Advanced Materials Research 850-851 (December 2013): 1368–71. http://dx.doi.org/10.4028/www.scientific.net/amr.850-851.1368.

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Introduce several examples of surface active agents used in wet-process phosphoric acid (WPPA) to show its effect on the quality of phosphogypsum. Summarized both domestic and foreign methods of comprehensive utilization of phosphogypsum, such as being made into calcium sulfate whisker, building materials, soil improvement agent, chemical raw materials and etc. Some problems of resources utilization of phosphogypsum in China are summarized, and reasonable suggestions are put forward.
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Kupnik, Kaja, Mateja Primožič, Vanja Kokol, and Maja Leitgeb. "Nanocellulose in Drug Delivery and Antimicrobially Active Materials." Polymers 12, no. 12 (November 27, 2020): 2825. http://dx.doi.org/10.3390/polym12122825.

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In recent years, nanocellulose (NC) has also attracted a great deal of attention in drug delivery systems due to its unique physical properties, specific surface area, low risk of cytotoxicity, and excellent biological properties. This review is focused on nanocellulose based systems acting as carriers to be used in drug or antimicrobial delivery by providing different but controlled and sustained release of drugs or antimicrobial agents, respectively, thus showing potential for different routes of applications and administration. Microorganisms are increasingly resistant to antibiotics, and because, generally, the used metal or metal oxide nanoparticles at some concentration have toxic effects, more research has focused on finding biocompatible antimicrobial agents that have been obtained from natural sources. Our review contains the latest research from the last five years that tested nanocellulose-based materials in the field of drug delivery and antimicrobial activity.
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Olkowska, Ewa, Marek Ruman, Magdalena Drąg-Śmigalska, and Żaneta Polkowska. "Selected anionic and cationic surface active agents: case study on the Kłodnica sediments." Limnological Review 17, no. 1 (March 1, 2017): 11–21. http://dx.doi.org/10.1515/limre-2017-0002.

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AbstractSurface active agents (surfactants) are a group of chemical compounds, which are used as ingredients of detergents, cleaning products, cosmetics and functional products. After use, wastes containing surfactants or their degradation products are discharged to wastewater treatment plants or directly into surface waters. Due to their specific properties of SAAs, compounds are able to migrate between different environmental compartments such as soil, sediment, water or even living organisms and accumulate there. Surfactants can have a harmful effect on living organisms. They can connect with bioactive molecules and modify their function. Additionally, they have the ability to migrate into cells and cause their damage or death. For these reasons investigation of individual surfactants should be conducted. The presented research has been undertaken to obtain information about SAA contamination of sediment from the River Kłodnica catchment caused by selected anionic (linear alkylbenzene sulfonates (LAS C10-C13)) and cationic (alkylbenzyldimethylammonium (BDMA-C12-16), alkyl trimethyl ammonium (DTMA), hexadecyl piridinium chloride (HP) chlorides) surfactants. This river flows through an area of the Upper Silesia Industrial Region where various companies and other institutions (e.g. coal mining, power plants, metallurgy, hospitals) are located. To determine their concentration the following analytical tools have been applied: accelerated solvent extraction– solid phase extraction – high performance liquid chromatography – UV-Vis (anionic SAAs) and conductivity (cationic SAAs) detectors. In all sediments anionic SAAs have been detected. The concentrations of HTMA and BDMA-C16in tested samples were higher than other cationic analytes. Generally, levels of surfactants with longer alkyl chains were higher and this observation can confirm their higher susceptibility to sorption on solid surfaces.
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Kukueva, V. V. "Quantum-Chemical Research of Fluoro Containing Hydrocarbons, That Have Fire Extinguishing Effect." Фізика і хімія твердого тіла 16, no. 3 (September 15, 2015): 511–14. http://dx.doi.org/10.15330/pcss.16.3.511-514.

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Through quantum-chemical calculations, a study was conducted to find the probable products of the destruction of molecules of extinguishing agents. The formation of atomic fluorine and trifluoromethane radical has been shown to contribute to the retardation of elementary reactions in the flame. It has been shown that active inhibitory components are more easily dissociated from the silica surface than in the case of bulk molecules.
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Makarewicz, Edwin, and Krzysztof Jan´czak. "The influence of organic diluents and solvents on the stability of PVC plastisol water dispersions." Polish Journal of Chemical Technology 9, no. 1 (January 1, 2007): 43–50. http://dx.doi.org/10.2478/v10026-007-0011-1.

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The influence of organic diluents and solvents on the stability of PVC plastisol water dispersions The work presents the research, the aim of which is to specify the influence of organic diluents and solvents such as xylene, toluene, n-butyl acetate and butanol as well as cyclohexanone on the stability of water dispersions of the PVC plastisol containing various surface-active agents (SAA). The applied surfactants were characterised by a specific ethoxylation number, molecular mass, the Hildebrand parameter, hydrophilic-hydrophobic balance, surface activity, the limiting viscosity number, the Haller interaction constant, the limiting equivalent conductivity and the Kohlrausch-Onsager equation "b" constant. Basing on the molar refraction and the Hildebrand parameter, the interactions between the plastisol constituents and the constituents of water dispersions of the PVC plastisol were established. The sedimentation tests on the PVC plastisol water dispersions stabilized by various surface-active agents with an organic diluent or solvent added indicated that the addition resulted in the dispergation yield, a reduction in the PVC plastisol molecular size in water dispersion and the increased Huggins interaction constant, showing both surface lyophilisation and higher adsorption of surface-active agents.
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Farberova, Еlena A., Anastasia Yu Katysheva, Elena A. Tingaeva, Sergey A. Smirnov, and Andrey G. Starostin. "RESEARCH OF POSSIBILITY OF USING CHEMICAL METHOD OF FINE METAL PARTICLES REDUCTION FOR BACTERICIDAL SORBENTS PRODUCTION." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENII KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 63, no. 3 (March 8, 2020): 46–53. http://dx.doi.org/10.6060/ivkkt.20206303.6047.

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The present paper is concerned with a research of sorption and bactericidal properties of the fine metal particles applied on the surface of active carbon fabric by chemical sedimentation method. The ascorbic acid and natrium borane were used in the study process as metals, copper and silver reducing agents. Influence of reducer and fine metal nature onto the porous structure, as well as bactericidal and sorption characteristics of obtained fibrous sorbent samples are shown. It is determined that use of ascorbic acid for synthesis of copper and silver fine particles on the active carbon fabrics surface leads to the considerable decrease in a specific surface and volumes of meso - and micropores of the obtained sorbent in comparison with initial active carbon fabric. When using the natrium borane as reducer of fine copper particles the decrease in a specific surface and volumes of sorption pores is also observed. However, when using the natrium borane, the active carbon fabric samples modified with silver particles or with their composition with fine copper particles, had the higher values of porous structure main characteristics in comparison with the initial active carbon fabric. The nature of distribution of fine metal particles at the active carbon fabric surface was investigated by the electronic microscopy method. It was found that during the chemical reduction process the particles of fine copper attached to active carbon fabric fibers, being almost evenly distributed at all surface of fabric. Particles of silver were located as crystal congestions along fibers. Sorption and bactericidal properties of the received samples of modified active carbon fabrics are investigated. Their high sensitivity to microorganism cells which remains during a long storage period is demonstrated. Herewith, the active carbon fabric, modified with particles of fine copper and silver, keeps high sorption properties.
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Chen, Qian Lin, Yu Guo, and Na Guo. "The Research of Extracting Hippuric Acid from Breeding Wastewater." Advanced Materials Research 550-553 (July 2012): 2215–18. http://dx.doi.org/10.4028/www.scientific.net/amr.550-553.2215.

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Hippuric acid as an important raw material used to synthesize medication and coloring matter, abound in urine of much animal, especially in cattle. Hippuric acid usually is letted into river and soil with the urine. But as its chemical stability, hippuric acid couldn’t be decomposed easily and pollute the environment. This research finds effectively liquid membrane to treat with such waste water such as breeding wastewater that contains high hippuric acid. In our study, the best liquid membrane was found by searching what and how much surface active agents and carrier are suitable, pH of out-water of the liquid membrane and concentration of NaOH in the in-water of liquid membrane. As the outcome shown, the best prescription is surface active agent T-151(2% mass fraction), liquid carrier TBP( 4% mass fraction), pH of out-water 2.0, concentration of NaOH in the in-water 0.50mol/L. Under the condition, extraction rate of hippuric acid from breeding wastewater can reach more than 98% during 9min.
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He, Song, Yanmei Zhang, Wansheng Yang, Xudong Zhao, and Bin Zeng. "Fabrication and Frosting Properties Study of Surface-Active Agents Coating Based on Nanoporous Aluminum Substrate." Energies 11, no. 10 (October 17, 2018): 2797. http://dx.doi.org/10.3390/en11102797.

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In order to solve the frosting and blockage problem of an air conditioning evaporator’s fin in winter, the nanoporous aluminum plates with low surface energy has been proposed in this paper, which are fabricated by an anodizing method and then modified by lauric acid. The nanoporous aluminum plates with different nanoporous diameters ranging from 15 nm to 400 nm are obtained by changing the magnitude of the oxidation current. The surface contact angle of the nanoporous aluminum plates is an important factor influencing its surface frost and condensation. The test results show that the surface contact angle is decreased with the increasing of nanoporous diameter. When the nanoporous aluminum plates are modified by lauric acid, the contact angle is proportional to the nanoporous diameter, and the maximum contact angle can reach about 171°. A set of experimental instruments has been set up to simulate the typical winter climate in northern China, and the frosting properties of the nanoporous aluminum plate’s fin is analyzed by experiment. The results show that increasing the contact angle of aluminum plates can effectively improve its anti-frosting properties. The average frosting rate of the aluminum plate with the contact angle of 60° is about 0.33 [g/(min∙m2)], which is 1.74 times that of the aluminum plate with the contact angle of 171°, whose frosting rate is about 0.19 [g/(min∙m2)]. After taking the expanded aperture processing to the aluminum plate, the diameter with 30 nm, 100 nm, 200 nm, 300 nm, and 400 nm nanoporous aluminum plates are obtained and the polished aluminum plates are also prepared for comparing. Through the test results, the nanoporous aluminum plates are shown to have anti-frosting properties, and the nanoporous aluminum plates with diameter of 300 nm are shown to have the best anti-frosting properties. The calculation mode of frosting growth is derived on the base of experimental results. This research will be helpful in indicating the potential research area of the low-carbon-emission and energy-saving technology for the researchers all over the world.
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Dissertations / Theses on the topic "Surface active agents – Research"

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Moore, Jeffrey W. "Effects of surfactants on the biodegradation of toluene in soil." Thesis, Virginia Tech, 1989. http://hdl.handle.net/10919/43100.

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The objective of this investigation was to observe and evaluate the effects of surfactants on the biodegradation of toluene in the subsurface. Soil microcosms containing gasoline were used to simulate conditions of an aquifer contaminated with hydrocarbons. The surfactants were the nonionics, Surfonic N-40 and N-95. Three volumes of gasoline, 0.005, 0.05, and 0.1 mL, were injected into separate microcosms in order to observe changes in toluene concentration in both adsorbed component conditions and free-phase, interstitial gasoline conditions. The data presented are the results from the microcosms containing 0.005 mL gasoline. -Dissolved toluene was only partially biodegraded in the microcosms containing free-phase hydrocarbons. The lack of complete biodegradation was believed to be due to substrate toxicity.
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Wahlgren, Marie. "Adsorption of proteins and interactions with surfactants at the solid/liquid interface." [Lund : Dept. of Food Technology, Lund University], 1992. http://books.google.com/books?id=zfxqAAAAMAAJ.

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Mobbs, Tamara Leah. "Effects of four soil surfactants on four soil-water properties in sand and silt loam." Pullman, Wash. : Washington State University, 2010. http://www.dissertations.wsu.edu/Thesis/Spring2010/t_mobbs_050110.pdf.

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Thesis (M.S. in biological and agricultural engineering)--Washington State University, May 2010.
Title from PDF title page (viewed on June 23, 2010). "Department of Biological Systems Engineering." Includes bibliographical references (p. 16-22).
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Mendoza, Alvaro. "The synthesis and characterization of novel surfactants." Laramie, Wyo. : University of Wyoming, 2006. http://proquest.umi.com/pqdweb?did=1296090131&sid=1&Fmt=2&clientId=18949&RQT=309&VName=PQD.

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Jose, Robin. "Synthesis and characterization of novel amphiphiles." Laramie, Wyo. : University of Wyoming, 2006. http://proquest.umi.com/pqdweb?did=1296090121&sid=1&Fmt=2&clientId=18949&RQT=309&VName=PQD.

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Stellner, Kevin Lance. "Precipitation of surfactants and surfactant mixtures in aqueous solutions /." Full-text version available from OU Domain via ProQuest Digital Dissertations, 1987.

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Topp, Kathryn A. "Cationic oligomeric surfactants novel synthesis and characterization /." Connect to full text, 2006. http://hdl.handle.net/2123/1728.

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Thesis (Ph. D.)--School of Chemistry, Faculty of Science, University of Sydney, 2006.
Title from title screen (viewed 13 January 2009). Submitted in fulfilment of the requirements for the degree of Doctor of Philosophy to the School of Chemistry, Faculty of Science. Includes bibliographical references. Also available in print form.
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Xu, Juanbao. "Fabrication of Osmotic Distillation Membranes for Feeds Containing Surface-Active Agents." Queensland University of Technology, 2005. http://eprints.qut.edu.au/16049/.

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The present work was undertaken to develop a composite osmotic distillation (OD) membrane consisting of a thin hydrogel coating on a microporous hydrophobic substrate for the concentration of aqueous feeds containing surface-active agents. The range of OD applications using the hydrophobic membrane alone have been severely limited by the propensity for membrane wet-out when contacted by amphiphilic agents such as oils, fats and detergents. Wet-out allows the feed solution to track freely through the membrane pores with a resulting loss of solutes and a decrease in selectivity. The rationale for the approach taken was based on the hypothesis that the high water selectivity of the hydrophilic coating would maintain good water mass transfer to the underlying hydrophobic substrate but exclude other components including surface-active agents. The first stage of this work involved the identification of potential coating materials and the fabrication and structural characterization of films of these materials to determine their suitability. The second stage involved the development of techniques to facilitate adhesion of the hydrophilic coatings to the hydrophobic substrate, and the testing of the resulting composite membranes for OD performance and resistance to wet-out by surface-active agents. Sodium alginate was selected as the major coating component on the basis of its non-toxicity and its potential for stable hydrogel formation. Structural characterization of noncrosslinked films and films crosslinked using a water-soluble carbodiimide (WSC) was carried out using differential scanning calorimetry (DSC), Fourier Transform infrared spectroscopy (FT-IR) and swelling measurements. Maximum crosslinking through esterification of hydroxyl and carboxylic acid groups on adjacent polymer strands using the film immersion method was achieved with a non-solvent (ethanol) concentration of 60 vol % and a WSC concentration of 100 mM at pH 4. These conditions resulted in a hydrogel with an equilibrium water content of 60 wt %. DSC measurements of noncrosslinked and crosslinked alginate films showed an increase in crystallinity and hence rigidity on crosslinking. Therefore, several coatings were prepared as blends of sodium alginate and amorphous highly flexible carrageenan gum in order to meet the flexibility requirements of a membrane subjected to varying operating pressures in an industrial OD plant. Structural characterization with respect to polymer blend ratio was carried out using scanning electron microscopy (SEM), DSC, X-ray diffraction (XRD). The optimisation for crosslinking conditions was undertaken as for sodium alginate alone. Optimum conditions for film preparation were 20 wt % carrageenan content and a crosslinking medium containing 60 vol % non-solvent (ethanol) and 120 mM WSC at pH 4. These conditions produced a hydrogel with an equilibrium water content of 85 wt %. Two different techniques were employed to anchor the coatings on substrate PTFE membranes. For membranes with a nominal diameter of 0.2 µm, the technique involved surface tension adjustment of the coating solution by ethanol addition in order to enhance penetration of the coating solution meniscus into the substrate pores. This was followed by polymer precipitation by the selective removal of water using OD to provide structural interlocking. T-peel strength measurements showed that this technique resulted in a ten-fold increase in adhesion strength when compared with a coating cast without surface tension adjustments. For membranes with a nominal diameter of 0.1µm, an interfacial bonding agent, myristyltrimethylammonium bromide (MTMA), was used. This technique gave a three-fold increase in adhesion strength relative to that of coating cast without the use of MTMA. The composite membranes were tested in extended OD trials using pure water and feeds containing limonene, the major surface-active components of orange oil. The sodium alginate-carrageenan blend membrane, which was the preferred membrane based on flexibility and water sorption considerations, was also tested against full-cream milk and an industrial detergent, sodium dodecylbenzene sulfonate (DBS). The results indicated that the coatings offered little resistance to water transport and were effective in providing protection against membrane wet-out. Durability trials showed that the composite membranes retained their integrity in water for a minimum of 30 days. Overall, this study has expanded the potential applications of OD to include many important industrial concentration steps that are currently being undertaken by conventional processes with unsatisfactory results. These include the concentration of citrus juices, full-cream milk and nuclear power plant liquid waste. These feeds contain limonene, fats and detergents respectively, all of which wet out unprotected hydrophobic membranes.
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Flower, C. "Factors influencing the prediction of ocular irritation by surface-active agents." Thesis, University College London (University of London), 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.377557.

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Gould, Larissa Anne. "Some factors influencing the effects of surface active agents on membranes." Thesis, King's College London (University of London), 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.338742.

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Books on the topic "Surface active agents – Research"

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Irene, Ash, ed. Handbook of industrial surfactants. 3rd ed. Endicott, NY: Synapse Information Resources, 2000.

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Os, N. M. van. Physico-chemical properties of selected anionic, cationic, and nonionic surfactants. Amsterdam: Elsevier, 1993.

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Ash, Michael. Handbook of industrial surfactants: An international guide to more than 21,000 products by trade name, composition, application, and manufacturer. 2nd ed. Aldershot, Hampshire, England: Gower, 1997.

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Ash, Michael. Handbook of industrial surfactants: An international guide to more than 16,000 products by tradename, application, composition & manufacturer. Aldershot, Hants, England: Gower, 1993.

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Swisher, R. D. Surfactant biodegradation. 2nd ed. New York: M. Dekker, 1987.

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Chemical formulation: An overview of surfactant based chemical preparations used in everyday life. Cambridge: Royal Society of Chemistry, 2003.

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Porter, M. R. Handbook of surfactants. Glasgow: Blackie, 1991.

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Wiśniewski, Maciej. Synteza i aktywność powierzchniowa 4-alkilofenyloamin oraz ich pochodnych. Poznań: Wydawn. Politechniki Poznańskiej, 1991.

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Flick, Ernest W. Industrial surfactants. Park Ridge, N.J., U.S.A: Noyes Publications, 1988.

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Yu, Su, and Wang Guixiang, eds. Biao mian huo xing ji hua xue. Beijing Shi: Beijing li gong da xue chu ban she, 2009.

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Book chapters on the topic "Surface active agents – Research"

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Paulus, Wilfried. "Surface Active Agents." In Microbicides for the Protection of Materials, 375–400. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-2118-7_18.

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Paulus, Wilfried. "Surface active agents." In Directory of Microbicides for the Protection of Materials, 707–33. Dordrecht: Springer Netherlands, 2004. http://dx.doi.org/10.1007/1-4020-2818-0_41.

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Moroi, Yoshikiyo. "Surface-Active Agents." In Micelles, 7–24. Boston, MA: Springer US, 1992. http://dx.doi.org/10.1007/978-1-4899-0700-4_2.

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Gooch, Jan W. "Surface-Active Agents." In Encyclopedic Dictionary of Polymers, 715. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_11429.

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Albert, Adrien. "Surface chemistry.The modifiction of membranes by surface-active agents." In Selective Toxicity, 590–610. Dordrecht: Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-4846-4_14.

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Rosenberg, Eugene. "Surface Active and Drag-Reducing Bacterial Polymers." In Biotechnology: Bridging Research and Applications, 231–48. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3456-9_16.

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Jacobasch, H. J. "Adsorption Behaviour Of Surface Active Agents And Electrokinetic Phenomena." In Surfactants in Solution, 381–96. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4613-0839-3_29.

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Kraus, Sarah, Inna Naumov, and Nadir Arber. "COX-2 Active Agents in the Chemoprevention of Colorectal Cancer." In Recent Results in Cancer Research, 95–103. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-30331-9_5.

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Birdi, K. S., and E. H. Stenby. "Wetting of Solids by Surface Active Agents: Dispersion and the Polar Surface Tension Components." In Surfactants in Solution, 1105–12. Boston, MA: Springer US, 1986. http://dx.doi.org/10.1007/978-1-4615-7981-6_45.

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Hrust, V., V. Tomišić, and N. Kallay. "Characterisation of aqueous solutions of ionic surface active agents by conductometry." In Trends in Colloid and Interface Science XVI, 127–30. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/b11745.

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Conference papers on the topic "Surface active agents – Research"

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Kiselov, Georgij, Vladimir Jemeljanov, and Janis Ievinsh. "Assessment of Improving the Efficiency of Fire Extinguishing by Using Surface Active Agents." In Civil engineering '17 : 6th International Scientific Conference "Research for Environment and Civil Engineering Development 17”. Latvia University of Life Sciences and Technologies, 2018. http://dx.doi.org/10.22616/ce.2018.014.

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Kiselov, Georgij, Vladimir Jemeljanov, and Janis Ievinsh. "Assessment of Improving the Efficiency of Fire Extinguishing by Using Surface Active Agents." In Civil engineering '17 : 6th International Scientific Conference "Research for Environment and Civil Engineering Development 17”. Latvia University of Life Sciences and Technologies, 2018. http://dx.doi.org/10.22616/ce.2017.014.

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Hu, Bin, and Sarah L. Kieweg. "The Effect of Surface Tension on the Epithelial Spreading of Non-Newtonian Drug Delivery Vehicles: Numerical Simulations." In ASME 2009 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2009. http://dx.doi.org/10.1115/sbc2009-206565.

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This paper is one of the components of our research on how to optimize polymeric drug delivery vehicles. One of the applications is in the topical delivery of anti-human immunodeficiency virus (HIV) gels called microbicides [1]. Microbicides are delivered to vaginal or rectal epithelium to protect it from HIV and other sexually transmitted infections. Microbicides may provide a physical barrier amplifying the normal vaginal defense, as well as destroy the pathogens chemically or inhibit viral infection. The microbicide may consist of an anti-HIV active agent in some delivery vehicle, such as a gel, cream or foam. Microbicides are a promising solution to provide a low-cost, female-controlled method for protection against HIV and other sexually transmitted pathogens.
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Li, Wang, and Liqiao Huang. "Research on Methods to Solve Emulsion Phenomenon in the Transportation of Diesel Through Pipeline." In ASME 2019 Asia Pacific Pipeline Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/appc2019-7630.

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Abstract This paper describes and analyzes the emulsion phenomenon of diesel in commissioning of Products Pipeline by Sinopec and PetroChina in recent years. Studies have shown that the ester anti-wear agent in diesel oil as well as the interface active substance contained in diesel are the emulsifiers of diesel and water, which cause the emulsification of diesel and water under strong shearing in pipeline. On the basis of this background, isentropic simulation experiment is carried out to obtain the emulsion in laboratory by creating a similar shearing stress. The basic properties of diesel, anti-wear properties and emulsion stability are studied, and the rate of water content, surface tension and droplet size are compared and analyzed. Then based on oil-water separation experiment, solutions to diesel emulsification, relevant experience and suggestions for the production of refined oil pipelines are put forward, which may be valuable reference for future commission of Products Pipeline.
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Tucureanu, Vasilica, Marian Popescu, Cosmin Romanitan, Iuliana Mihalache, Bianca Tincu, Marioara Avram, and Alina Matei. "Interaction of oxide nanoparticles with surface-active agents." In Advanced Topics in Optoelectronics, Microelectronics and Nanotechnologies IX, edited by Ionica Cristea, Marian Vladescu, and Razvan D. Tamas. SPIE, 2018. http://dx.doi.org/10.1117/12.2323589.

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Vasko, Christopher A., and Christina G. Giannopapa. "Liquid Droplets in Contact With Cold Non-Equilibrium Atmospheric Pressure Plasmas." In ASME 2016 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/pvp2016-63629.

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Recently, cold, non-equilibrium atmospheric pressure plasmas (CAPs) and their active chemistry have been extensively investigated to the benefit of a wide array of applications such as biomedical and industrial applications mainly in the area of materials processing and chemical synthesis, amongst many others. In general, these plasmas operate at standard conditions (i.e. 1 atm, 300K), are small (∼ cm) and rather simple to operate in comparison to other plasmas. Their complex chemistry gives rise to a wide array of both stable and transient reactive species: such as O3, H2O2, OH and NOx, next to charged species and (V)UV-radiation. This chemistry is the reason for their wide spread application and has already found many industrial applications from waste water treatment, stain free detergents and industrial scale production of oxidants. In recent years, bactericidal effects of CAPs gained increasing attention for applications such as dermatology, disinfection, dentistry and cancer treatment or stimulated blood coagulation. This paper aims to highlight recent research into new biological applications for complex mission scenarios involving humans in remote locations using CAPs for disinfection, bleaching or wound healing. Results using radiofrequency plasma jets for the inactivation of Pseudomonas aeruginosa are summarized, highlighting the importance of liquid plasma interactions. Work with such a CAP paved the way for a promising application in the field of biomedical applications presented here. It involves surface barrier discharges which can be used to treat larger surfaces compared to jets. Their physical construction, using floating or contained electrodes, offer a convenient way of controlling electrical current on a large scale, 3D treatment of both conducting and insulating surfaces with minimal heating. These devices may be tailored to specific skin treatments, allowing fast and effective treatment of larger skin surfaces while following the shape of the skin. This might reduce the need for bactericidal agents and would be a valuable application to assist humans in remote locations. These emerging technologies could be essential both for human health care under extreme conditions, as well as for research itself (sterilisation of tools and large areas, etc.). Especially in the absence of abundant resources (antibiotic agents, disinfectants and the like) alternative approaches to support humans in isolated locations have to be developed. Applications based on a good understanding of plasma chemistry would empower health care under extreme conditions to efficiently use and manage in situ resources. Their low mass, compact size, low power consumption and high reliability could make them essential use under extreme conditions.
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Barrett, Ronald M. "All-moving active aerodynamic surface research." In Symposium on Active Materials and Smart Structures: Society of Engineering Science 31st Annual Meeting, edited by Gary L. Anderson and Dimitris C. Lagoudas. SPIE, 1995. http://dx.doi.org/10.1117/12.200915.

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Berini, Pierre. "Active and Passive Surface Plasmon Photonics." In Integrated Photonics Research, Silicon and Nanophotonics. Washington, D.C.: OSA, 2011. http://dx.doi.org/10.1364/iprsn.2011.itud1.

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Michalenko, Michelle M., and Timothy C. Ovaert. "Tribological Characterization of Biomimetic Low-Friction Gels." In ASME 2009 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2009. http://dx.doi.org/10.1115/sbc2009-206574.

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Cartilage injury and disease are significant health issues that affect people of all ages. With an increase in active lifestyles, extended life expectances, and diseases such as osteoarthritis, millions of people worldwide are being treated with some form of joint replacements [1], and that number is expected to increase. Although current joint replacements have been successful thus far, typically patients experience long term failure due to wear between the two major contacting surfaces; for example, a cobalt chrome femoral head and a polyethylene tibial plate [2]. While tissue engineered constructs with natural cellular materials are a subject of intense research, their load carrying ability and mechanical function are still far from what is necessary for long-life contacting surfaces. A vastly improved contact surface is desirable, utilizing materials that better mimic the structure and excellent tribological properties of natural cartilage. Such a material could also potentially be designed for use against natural cartilage, when defects are more localized.
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E. L., Terechova, Wang Guowen, Xu Xiaochen, and Yang Fenglin. "Conditions of surface-active agents in wastewaters from laundries of railway enterprises." In The International Conference on Remote Sensing,Environment and Transportation Engineering. Paris, France: Atlantis Press, 2013. http://dx.doi.org/10.2991/rsete.2013.149.

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Reports on the topic "Surface active agents – Research"

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Taylor, Oliver-Denzil, Amy Cunningham,, Robert Walker, Mihan McKenna, Kathryn Martin, and Pamela Kinnebrew. The behaviour of near-surface soils through ultrasonic near-surface inundation testing. Engineer Research and Development Center (U.S.), September 2021. http://dx.doi.org/10.21079/11681/41826.

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Seismometers installed within the upper metre of the subsurface can experience significant variability in signal propagation and attenuation properties of observed arrivals due to meteorological events. For example, during rain events, both the time and frequency representations of observed seismic waveforms can be significantly altered, complicating potential automatic signal processing efforts. Historically, a lack of laboratory equipment to explicitly investigate the effects of active inundation on seismic wave properties in the near surface prevented recreation of the observed phenomena in a controlled environment. Presented herein is a new flow chamber designed specifically for near-surface seismic wave/fluid flow interaction phenomenology research, the ultrasonic near-surface inundation testing device and new vp-saturation and vs-saturation relationships due to the effects of matric suction on the soil fabric.
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