Relevant bibliographies by topics / 30 Chemie

Contents

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

Academic literature on the topic '30 Chemie'

Author: Grafiati
Published: 4 June 2021
Last updated: 6 February 2022

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Journal articles on the topic "30 Chemie"

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Jaenicke, Lothar, Horst König, Max Herberhold, Gernot Boche, Heinz Wambach, Friedrich Hensel, and Rudolf Janoschek. "Chemie in 30 Jahren." Chemie in unserer Zeit 30, no. 1 (February 1996): 39–44. http://dx.doi.org/10.1002/ciuz.19960300107.

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Potapov, Alexey, André Canosa, Elena Jiménez, and Bertrand Rowe. "Chemie mit Überschall: 30 Jahre astrochemische Forschung und künftige Herausforderungen." Angewandte Chemie 129, no. 30 (June 13, 2017): 8742–66. http://dx.doi.org/10.1002/ange.201611240.

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Redactie. "Mutaties in het register Laboratoriumspecialist Klinische Chemie t/m 30 juni 2021." Laboratoriumgeneeskunde 4, no. 3 (July 2021): 3. http://dx.doi.org/10.24078/labgeneeskunde.2021.7.127603.

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Varnholt, Hendrik. "Oetkers formen neuen Mischkonzern." Lebensmittel Zeitung 73, no. 30 (2021): 10. http://dx.doi.org/10.51202/0947-7527-2021-30-010-5.

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Die Gesellschafter der Oetker-Gruppe beenden ihren Streit auf die harte Art: Sie spalten ihr Unternehmen. Drei der bislang acht Eigentümer formen rund um Sekt, Chemie und Großverbraucher-Backwaren einen neuen Mischkonzern mit Expansionsplänen.
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Kummer, Beate, Henning Friege, Barbara Zeschmar-Lahl, and Jörg Wagner. "Nützen Scip-Daten der Abfallwirtschaft?" UmweltMagazin 51, no. 03-04 (2021): 30–32. http://dx.doi.org/10.37544/0173-363x-2021-03-04-30.

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Chemie spielt beim Recycling künftig eine größere Rolle. So soll „Scip“ – die neue Datenbank der EU – dafür sorgen, dass sehr gefährliche Schadstoffe nicht mit recycelt werden. Gute Idee! Doch drei Fallbeispiele zeigen, dass dies in der Praxis nicht einfach zu erreichen ist.
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Chandrasekaran, Srinivasan, Srivari Chandrasekhar, and Sandeep Verma. "Editorial: Der “National Organic Symposium Trust” – seit über 30 Jahren prägend für die organische Chemie in Indien." Angewandte Chemie 131, no. 28 (May 24, 2019): 9394–95. http://dx.doi.org/10.1002/ange.201901365.

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Nölting, J. "R. Haase: Thermodynamik. Aus der Reihe “Grundzüge der Physikalischen Chemie”, Steinkopff Verlag, Darmstadt 1985. 288 Seiten, Preis: DM 30,-." Berichte der Bunsengesellschaft für physikalische Chemie 90, no. 9 (September 1986): 840–41. http://dx.doi.org/10.1002/bbpc.19860900918.

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Fritzsche, H. "Spektroskopische Methoden in der organischen Chemie Wissenschaftliche Taschenbücher, Reihe Chemie, Band 21. Von B. Borsdorf und M. Scholz, Verantwortlicher Herausgeber dieses Bandes: E. Leibnitz. Akademie-Verlag, Berlin 1964. 179 Seiten, 51 Bilder, 30 Tab." Zeitschrift für Chemie 5, no. 12 (September 2, 2010): 479–80. http://dx.doi.org/10.1002/zfch.19650051238.

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Dörr, F., G. Kämpf, H. W. Spieß, W. Weyrich, and M. Zeidler. "Bericht über die 86. Hauptversammlung der Deutschen Bunsen-Gesellschaft für Physikalische Chemie e.V. vom 28. bis 30. Mai 1987 in Göttingen:Hauptthema:„Spektroskopie in kondensierten Phasen”︁." Berichte der Bunsengesellschaft für physikalische Chemie 91, no. 11 (November 1987): 1081–86. http://dx.doi.org/10.1002/bbpc.19870911103.

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Hoppe, R., K. L. Komarek, A. Neckel, and H. Schmalzried. "Bericht über die 91. Hauptversammlung der Deutschen Bunsen-Gesellschaft für Physikalische Chemie e. V. vom 28. bis 30. Mai 1992 in Wien Hauptthema: “Festkörper: Thermodynamik, Struktur und Bindung”." Berichte der Bunsengesellschaft für physikalische Chemie 96, no. 11 (November 1992): 1787–90. http://dx.doi.org/10.1002/bbpc.19920961154.

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Dissertations / Theses on the topic "30 Chemie"

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Walter, Jürgen [Verfasser]. "Cyclisierung von Tetraprolin : Aufbau verschiedener diastereomerer Cyclen aus D- und L-Prolin / Jürgen Walter." Ulm : Universität Ulm. Fakultät für Naturwissenschaften, 2000. http://d-nb.info/101547053X/34.

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Rabe, Stephanie [Verfasser]. "Beiträge zur Chemie molekularer Stannasiloxane / von Stephanie Rabe." 1999. http://d-nb.info/960477055/34.

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Neumann, Thorsten [Verfasser]. "Beiträge zur Chemie der Ethinylphosphane / vorgelegt von Thorsten Neumann." 2002. http://d-nb.info/964583852/34.

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Berkei, Michael [Verfasser]. "Beiträge zur Chemie polyvalenter Iod-Verbindungen / von Michael Berkei." 2000. http://d-nb.info/960487166/34.

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Wölke, Andreas [Verfasser]. "Wissenschaftstheoretische Beiträge zur Chemie : der Begriff der Robustheit in der Chemie ; formale Betrachtungen und experimentelle Arbeiten / von Andreas Wölke." 1999. http://d-nb.info/958531544/34.

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Urban, Martin [Verfasser]. "Beiträge zur Chemie der 1,2,3-Triazine / eingereicht von Martin Urban." 2003. http://d-nb.info/968450334/34.

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Neikes, Frank [Verfasser]. "Beiträge zur Chemie sp2-hybridisierter Chalkogenkohlenstoff-Verbindungen / von Frank Neikes." 2001. http://d-nb.info/961962194/34.

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Bredenkötter, Björn [Verfasser]. "Untersuchungen zur Chemie gespannter benzoanellierter Fenestrane / vorgelegt von Björn Bredenkötter." 2000. http://d-nb.info/960832068/34.

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Reiland, Vera [Verfasser]. "Chemie und Koordinationschemie von Bismuttrifluoracetat und verwandten Verbindungen / Vera Reiland." 2000. http://d-nb.info/960074562/34.

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Voigt, Anja [Verfasser]. "Zur Chemie photolytisch generierter Arylnitrene in Polymermatrizen / von Anja Voigt." 1998. http://d-nb.info/955351111/34.

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Books on the topic "30 Chemie"

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Standhartinger, Katherina. Chemie fu r Ahnungslose: Eine Einstiegshilfe fu r Studierende ; mit 30 Tabellen. 7th ed. Stuttgart: Hirzel, 2010.

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Vienna, Austria) Bunsentagung (1992. Bunsentagung 1992 Wien: 91. Hauptversammlung der Deutschen Bunsen-Gesellschaft für Physikalische Chemie e.V. : gemeinsam mit dem Institut für Technische Elektrochemie der TU Wien ... : 28.-30. Mai 1992, Wien. Frankfurt am Main: Deutsche Bunsen-Gesellschaft für Physikalische Chemie, 1992.

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Making great cheese at home: 30 simple recipes from cheddar to chève : plus 18 delicious cheese dishes. New York: Lark Books, 1999.

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Transmettre: Cheyne, 30 ans d'édition de poésie, 1980-2010. Le Chambon-sur-Lignon: Cheyne, 2010.

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Meeting, Société française de chimie Division de chimie physique International. Dynamics of molecular crystals: Proceedings of the 41st International Meeting of the Société française de chimie, Division de chimie physique jointly organised with Associazione italiana di chimica fisica, Deutsche Bunsen-Gesellschaft für Physikalische Chemie, Royal Society of Chemistry, Faraday Division, Grenoble, 30 June-4 July 1986. Amsterdam: Elsevier, 1987.

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Fressoz, Marc. FGV, faillite à grande vitesse: 30 ans de TGV. Paris: Cherche midi, 2011.

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FGV, faillite à grande vitesse: 30 ans de TGV. Paris: Cherche midi, 2011.

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Kubsch, Marcus, Stefan Sorge, Julia Arnold, and Nicole Graulich, eds. Lehrkräftebildung neu gedacht. Ein Praxishandbuch für die Lehre in den Naturwissenschaften und deren Didaktiken. Waxmann Verlag GmbH, 2021. http://dx.doi.org/10.31244/9783830993490.

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Die Lehrkräftebildung in den Naturwissenschaften hat die Aufgabe, die angehenden Lehrkräfte der Biologie, Chemie und Physik auf die Gestaltung des Unterrichts der Zukunft vorzubereiten. Dabei wurden in den letzten Jahren verstärkt neue Lehr-Lern-Formate, Technologien und Methoden an einzelnen Hochschulstandorten entwickelt, um dieser Herausforderung gerecht zu werden. Dieses Buch gibt einen praxisbezogenen Einblick in Innovationen der Lehrkräftebildung in den Naturwissenschaften und macht sie damit auch für den Einsatz an weiteren deutschsprachigen Hochschulen zugänglich. Dazu präsentieren die Autorinnen und Autoren aus über 30 Hochschulen in Deutschland, Österreich und der Schweiz neue Ansätze zu Unterstützungsmöglichkeiten der Kompetenzentwicklung, zum Einsatz von Medien und zur Förderung der Planung und Reflexion von Unterricht. Unterstützt wird die dies durch umfassende Onlinematerialien, was die Nutzung an anderen Hochschulstandorten begünstigen und damit die Weiterentwicklung der Lehrkräftebildung in den Naturwissenschaften insgesamt fördern soll.
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Cooking with cheese: Over 30 irresistible recipes that celebrate the tastes of cheese. 2013.

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Making Great Cheese: 30 Simple Recipes from Cheddar to Chevre Plus 18 Special Cheese Dishes. Lark Books, 2000.

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Book chapters on the topic "30 Chemie"

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Barra, P. M. C., M. M. Barra, and M. A. L. De Oliveira. "30. Total trans fatty acid in spreadable cheese." In Human Health Handbooks, 453–66. The Netherlands: Wageningen Academic Publishers, 2013. http://dx.doi.org/10.3920/978-90-8686-766-0_30.

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"30 Komplex-Verbindungen." In Chemie, edited by Charles E. Mortimer, Ulrich Müller, and Johannes Beck. Stuttgart: Georg Thieme Verlag, 2014. http://dx.doi.org/10.1055/b-0034-93654.

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Mortimer, Charles E., and Ulrich Müller. "30 Komplex-Verbindungen." In Chemie: Das Basiswissen der Chemie. Stuttgart: Georg Thieme Verlag, 2020. http://dx.doi.org/10.1055/b-0039-171996.

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"30 Amine." In Chemie für Mediziner, 335–40. De Gruyter, 1996. http://dx.doi.org/10.1515/9783112414200-031.

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"Kapitel 30. Synthetische Polymere." In Grundlagen der Organischen Chemie, 887–910. De Gruyter, 2015. http://dx.doi.org/10.1515/9783110331059.887.

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Hallbach, Jürgen. "30 Methoden- und Gerätevalidierung." In Klinische Chemie und Hämatologie. Stuttgart: Georg Thieme Verlag, 2019. http://dx.doi.org/10.1055/b-0039-167803.

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Reinermann, Heinrich. "Begrüßung des Festredners." In Die Chemie zwischen Hoffnung und Skepsis, 30. Nomos, 2008. http://dx.doi.org/10.5771/9783845210056-30.

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"30 Der flüssige Zustand und intermolekulare Kräfte." In Grundlagen der Physikalischen Chemie, 759–84. De Gruyter, 1990. http://dx.doi.org/10.1515/9783110854626.759.

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"Patrick Süskind: Das Parfum (1985 / 30. Aufl. 2000)." In Chemie und Literatur - ein ungewöhnlicher Flirt, 253–63. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2013. http://dx.doi.org/10.1002/9783527671793.ch30.

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Moschopoulou, Ekaterini. "Microbial Non-Coagulant Enzymes Used in Cheese Making." In Microbial Cultures and Enzymes in Dairy Technology, 204–21. IGI Global, 2018. http://dx.doi.org/10.4018/978-1-5225-5363-2.ch011.

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In this chapter, the use of microbial non-coagulant proteases, microbial lipases, and microbial transglutaminase in the cheese making procedure is discussed. Microbial proteases and lipases have been used for over 30 years to accelerate cheese ripening and consequently to enhance the cheese flavor development by increasing proteolysis and lipolysis level in a shorter time. They are commercially produced by bacteria and fungi species. Transglutaminase is a relative new enzyme, which catalyzes the cross-linking of peptide bonds and helps to improve the cheese texture and to increase the cheese yield. Today, cheeses from almost all cheese categories are produced using these enzymes.
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Conference papers on the topic "30 Chemie"

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Shaowei Liu and Virendra M. Puri. "Measurement of pH and Water Activity Values during Ripening of Camembert Cheese." In 2003, Las Vegas, NV July 27-30, 2003. St. Joseph, MI: American Society of Agricultural and Biological Engineers, 2003. http://dx.doi.org/10.13031/2013.14139.

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Diaz Gomez Maqueo, Pablo, Philippe Versailles, Gilles Bourque, and Jeffrey M. Bergthorson. "A Numerical Study on the Reactivity of Biogas/Reformed-Gas/Air and Methane/Reformed-Gas/Air Mixtures at Gas Turbine Relevant Conditions." In ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/gt2016-56655.

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This study investigates the increase in methane and biogas flame reactivity enabled by the addition of syngas produced through fuel reforming. To isolate thermodynamic and chemical effects on the reactivity of the mixture, the burner simulations are performed with a constant adiabatic flame temperature of 1800 K. Compositions and temperatures are calculated with the chemical equilibrium solver of CANTERA® and the reactivity of the mixture is quantified using the adiabatic, freely-propagating premixed flame, and perfectly-stirred reactors of the CHEMKIN-Pro® software package. The results show that the produced syngas has a content of up to 30 % H2 with a temperature up to 950 K. When added to the fuel, it increases the laminar flame speed while maintaining a burning temperature of 1800 K. Even when cooled to 300 K, the laminar flame speed increases up to 30 % from the baseline of pure biogas. Hence, a system can be developed that controls and improves biogas flame stability under low reactivity conditions by varying the fraction of added syngas to the mixture. This motivates future experimental work on reforming technologies coupled with gas turbine exhausts to validate this numerical work.
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Baumann, Sven, Lucien Teunckens, Robert Walthéry, Patrick Lewandowski, and Danny Millen. "The Results of Specific Efforts to Improve Techniques for the Decontamination of Concrete Surfaces in Nuclear Facilities." In ASME 2001 8th International Conference on Radioactive Waste Management and Environmental Remediation. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/icem2001-1309.

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Abstract Belgoprocess started the industrial decommissioning of the main process building of the former EURO-CHEMIC reprocessing plant in 1990, after completion of a pilot project in which two buildings were emptied and decontaminated to background levels. The remaining structures were demolished and the concrete debris was disposed of as industrial waste and green field conditions restored. Decommissioning involves the removal and decontamination of equipment from each cell, the decontamination of the cell walls, ceilings and floors, and the dismantling of the ventilation system. These activities are followed by a complete monitoring in order to obtain the unconditional release of the remaining structures. In the earlier days, concrete walls with limited in depth contamination, were decontaminated using commercially available pneumatic hand scabblers. In addition, 3-headed, 5-headed and 7-headed hand-operated floor scabblers have been used. The pneumatic powered machines have adapted dust extraction systems around the scabbier heads. To improve the working conditions for the operators, and to increase capacity, scabblers have been progressively automised. Operation efficiency was significantly improved when shaving machines were introduced, using a diamond tipped rotary head, designed to give a smooth surface finish, which is easier to measure. The use of these machines resulted in a higher efficiency and a 30% reduction of secondary waste production. It also reduced the physical load to the operators due to the absence of machine vibration. The paper gives an overview of the specific efforts that have been put in improving the techniques for the decontamination of concrete surfaces at the decommissioning of the Eurochemic reprocessing plant in Dessel, Belgium.
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Tricard, Marc, Paul R. Dumas, Don Golini, and James T. Mooney. "Prime Silicon and Silicon-on-Insulator (SOI) Wafer Polishing With Magnetorheological Finishing (MRF)." In ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-42149.

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The December 2001 [1, 2] edition of the International Technology Roadmap for Semiconductors [3] (ITRS-2001) identifies several challenges for the manufacturing of silicon and silicon-on-insulator (SOI) wafers. For silicon, edge exclusion, site flatness and nanotopography1 requirements will become extremely challenging. For SOI, requirements for the control of the top silicon layer and its associated uniformity are pushing the limits of metrology. Keeping ± 5% tolerances on thicknesses, gradually decreasing from more than 100nm to less than 20nm for partially depleted devices (let alone from 30 to 3nm for fully depleted devices) is exceeding the capabilities of traditional chemo-mechanical-polishing (CMP) processes [5]. This paper will briefly describe magnetorheological finishing (MRF) and its suitability for prime silicon and SOI wafer polishing. Particular emphasis will be placed on MRF’s ability to improve the global flatness and the total thickness variation (TTV) on prime silicon wafers, and to reduce the nominal thickness of the top silicon layer, while improving thickness uniformity on SOI wafers. The paper will also touch upon the process qualification issues associated with the tight requirements of the semiconductor industry.
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Aarthi, C., A. C. Senthil Kumar, and P. Sasireka. "Breaking the myth: All carcinoma cervix presenting as pyometra will have only palliative treatment." In 16th Annual International Conference RGCON. Thieme Medical and Scientific Publishers Private Ltd., 2016. http://dx.doi.org/10.1055/s-0039-1685277.

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Introduction: Carcinoma cervix is the second most common female carcinoma. Every year in India, 1,22,844 women are diagnosed with carcinoma cervix and of them 67,477 die. Carcinoma cervix rates among women in the age group between 30-64 has decreased by 1.8% per year on average but still date account for 16%. Of these, advanced carcinoma are about 80% and early are only 20%. Case Series: We are reporting 5 consecutive early carcinoma cervix cases who presented with pyometra and got treated at our hospital from April 2015-September 2015. Cases of early carcinoma cervix presented with pyometra were treated by pyometra drainage, intravenous antibiotics and appropriate treatment in the form of surgery (4 cases underwent Wertheim’s hysterectomy and 1 case had radical chemo radiation as she opted for same in view of high cardiac risk for anaesthesia). All 5 of them are disease free at the end of treatment with follow up of minimum 4 months duration (range 4-10). Conclusion: The idea is to emphasize that all carcinoma cervix with pyometra are not necessarily advanced and can still be given radical treatment like surgery or radiotherapy after pyometra drainage.
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Li, Jianing, Umesh Bhayaraju, and San-Mou Jeng. "Characterization of a Novel Porous Injector for Multi-Lean Direct Injection (M-LDI) Combustor." In ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/gt2017-63981.

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A generic novel injector was designed for multi-Lean Direct Injection (M-LDI) combustors. One of the drawbacks of the conventional pressure swirl and prefilming type airblast atomizers is the difficulty of obtaining a uniform symmetric spray under all operating conditions. Micro-channels are needed inside the injector for uniformly distributing the fuel. The problem of non-uniformity is magnified in smaller sized injectors. The non-uniform liquid sheet causes local fuel rich/lean zones leading to higher NOx emissions. To overcome these problems, a novel fuel injector was designed to improve the fuel delivery to the injector by using a porous stainless steel material with 30 μm porosity. The porous tube also acts as a prefilming surface. Liquid and gaseous fuels can be injected through the injector. In the present study, gaseous fuel was injected to investigate injector fuel-air mixing performance. The gaseous fuel was injected through a porous tube between two radial-radial swirling air streams to facilitate fuel-air mixing. The advantage of this injector is that it increases the contact surface area between the fuel-air at the fuel injection point. The increased contact area enhances fuel-air mixing. Fuel-air mixing and combustion studies were carried out for both gaseous and liquid fuel. Flame visualization, and emissions measurements were carried out inside the exit of the combustor. The measurements were carried out at atmospheric conditions under fuel lean conditions. Natural gas was used as a fuel in these experiments. Fuel-air mixing studies were carried out at different equivalence ratios with and without confinement. The mass fraction distributions were measured at different downstream locations from the injector exit. Flame characterization was carried out by chemiluminescence at different equivalence ratios and inlet air temperatures. Symmetry of the flame, flame length and heat release distribution were analyzed from the flame images. The effects of inlet air temperature and combustion flame temperature on emissions was studied. Emissions were corrected to 15% O2 concentration. NOx emissions increase with inlet air temperature and flame temperature. Effect of flame temperature on NOx concentration is more significant than effect of inlet air temperature. Fuel-air mixing profile was used to obtain mass fraction Probability Density Function (pdf). The pdfs were used for simulations in Chemkin Pro. The measured emissions concentrations at the exit of the injector was compared with simulations. In Chemkin model, a network model with several PSRs (perfectly stirred reactor) were utilized, followed by a mixer and a PFR (plug flow reactor). The comparison between the simulations and the experimental results was investigated.
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Vihar, Jangala Sai, and Deepak Mulajker. "A Descriptive Study to Assess the Association of Geriatric Score with Observed Chemo Toxicity in Cancer Patients Older than 60 Years." In Annual Conference of Indian Society of Medical and Paediatric Oncology (ISMPO). Thieme Medical and Scientific Publishers Pvt. Ltd., 2021. http://dx.doi.org/10.1055/s-0041-1735373.

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Abstract Introduction Cancer is the leading cause of death worldwide with elderly patients being predominantly affected. There seems to be a bias against administering chemotherapy to elderly patients with fewer elderly patients receiving chemotherapy as compared with their stagematched younger patients because of concerns about their capacity to endure treatment. To make personalized treatment decisions and to anticipate serious adverse effects, a toxicity prediction tool that can be computed at the bedside is the need of the hour. This well-validated score has not been tested in the Indian population. So, we decided to test the same score in our patients and try to correlate the score with the observed toxicity. Objectives This study was aimed to determine geriatric functional status by means of a standardized geriatric score and to correlate geriatric score with observed chemo toxicity. Materials and Methods Fifty consecutive elderly patients (age > 60 years) with a diagnosis of cancer and scheduled for chemotherapy were recruited. These patients were evaluated using the geriatric assessment tool which is based on functional, nutritional, and psychological status. After that patient’s pretherapy, chemo toxicity score or geriatric score was calculated using a published well-validated tool that consisted of 11 prechemotherapy variables as follows:a) Age of patient,b) Cancer typec) Planned chemotherapy dose,d) Planned number of chemotherapy drugse) Hemoglobin,f) Creatinine clearanceg) Geriatric questions like -i. How is your hearing?ii. Number of falls in past 6 months?iii. Can take your own medicines?iv. Does your health limit you in walking one block ? during past 4 weeksv. How much of time has your physical health or emotional problems interfered with your social activities (like visiting with friends, relatives etc.)The patients were then followed from the beginning to the end of six cycles of their chemotherapy regimen. Toxicities were noted after each clinical encounter by using the NCI-CTCAE, version 3.0.25. Results General characteristics: the mean age of participants was 66 years (standard deviation [SD] = 4.6 and range: 60–85 years). Of them, 60% received polychemotherapy and 82% received standard doses of chemotherapy. The mean score on activities of daily living was 66.7, comorbidity score was 2.7, the psychological scale was 63.8, the social-activity scale was 54.3, and social-support scale was 64.1. The mean pretherapy toxicity score is 7.24 according to the toxicity calculator. At least one grade 3 to 5 toxicity occurred in 30% of the patients (66% of grade 3, 20% of grade 4, and 13.3% of grade 5). The correlation between the predicted score and observed graded toxicity score by Pearson’s scale (α = 0.05) was 0.63. Conclusion The prediction model is easy to use, thus increasing the feasibility of incorporation in daily practice is important. It may enable oncologists to better assess the risk/benefit ratio and to adjust the treatment accordingly.
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Hamza, Mahmoud, Arul Kumaran, Jianing Li, Umesh Bhayaraju, and San-Mou Jeng. "Investigation of a Novel Fuel Injector for Dry Low NOx Combustor." In ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/gt2016-56722.

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In the present investigation, a novel fuel injection concept is developed for Dry Low NOx combustors. A multi-injector block is used for fuel-air mixing and flame stabilization. The injectors in the multi-injector block are equally spaced in a rectangular grid of 3×3. Each injector of the multi-injector block has a porous concentric tube through which fuel is injected into the annular space around the porous tube. The porous tube is made up of stainless steel with 30 μm porosity. Air enters the annular space around the porous tube through eight tubes that surround the porous tube. The fuel and air mix in the annular space between the injector wall and the porous tube. A CO2 mixing technique is adopted to investigate the fuel-air mixing quality under non-reacting atmospheric conditions. CO2 is used to simulate the fuel. The CO2 concentrations are converted to fuel mass fractions for comparison. The experiments are carried out at pressure drop of 4% across the injector. The fuel mass fraction contours show an annular ring of low fuel concentration downstream of the individual injectors with a high concentration in the Central Toroidal Recirculation zone (CTRZ). Furthermore, PIV measurements are conducted to study the injector aerodynamics under the same operating conditions. The PIV measurements also show CTRZ downstream of the individual injector. The jet emanating from the injectors expands gradually downstream. An outer weak recirculation zone (ORZ) is also observed between the jets. Preliminary combustion experiments are carried out to observe the flame shape and heat release distribution. The flame shape follows the velocity contours. The combustion studies show that the flame length is longer. The long flame length is due to the high velocities at the exit of the injector. A probability density function (pdf) is generated for the fuel mixture fraction. The pdf is based on the mixture fraction and velocity data obtained at the exit of the injector block. Chemkin analysis is carried out to estimate the emissions based on the experimentally obtained pdfs.
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9

Daiguji, Hirofumi, Peidong Yang, Andrew Szeri, and Arun Majumdar. "Transport Phenomena in Nanofluidic Channels." In ASME 2004 3rd Integrated Nanosystems Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/nano2004-46036.

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Ion transport in nanoscale channels has recently received increasing attention. Much of that has resulted from experiments that report modulation of ion transport through the protein ion channel, α-hemolysin, due to passage of single biomolecules of DNA or proteins [1]. This has prompted research towards fabricating synthetic nanopores out of inorganic materials and studying biomolecular transport through them [2]. Recently, the synthesis of arrays of silica nanotubes with internal diameters in the range of 5–100 nm and with lengths 1–20 μm was reported [3]. These tubes could potentially allow new ways of detecting and manipulating single biomolecules and new types of devices to control ion transport. Theoretical modeling of ionic distribution and transport in silica nanotubes, 30 nm in diameter and 5 μm long, suggest that when the diameter is smaller than the Debye length, a unipolar solution of counterions is created within the nanotube and the coions are electrostatically repelled [4]. We proposed two different types of devices to use this unipolar nature of solution, i.e. ‘transistor’ and ‘battery’. When the electric potential bias is applied at two ends of a nanotube, ionic current is generated. By locally modifying the surface charge density through a gate electrode, the concentration of counterions can be depleted under the gate and the ionic current can be significantly suppressed. This could form the basis of a unipolar ionic field-effect transistor. By applying the pressure bias instead of electric potential bias, the fluid flow is generated. Because only the counterions are located inside the channel, the streaming current and streaming potential are generated. This could form the basis of an electro-chemo-mechanical battery. In the present study, transport phenomena in nanofluidic channels were investigated and the performance characteristics were evaluated using continuum dynamics.
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10

Dempsey, A. B., B. Das Adhikary, S. Viswanathan, and R. D. Reitz. "Reactivity Controlled Compression Ignition (RCCI) Using Premixed Hydrated Ethanol and Direct Injection Diesel." In ASME 2011 Internal Combustion Engine Division Fall Technical Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/icef2011-60235.

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Previous research has shown that a Homogeneous Charge Compression Ignition (HCCI) engine with efficient heat recovery can operate on a 35 to 65% volumetric mixture of ethanol-in-water while achieving high brake thermal efficiency (∼39%) and very low NOx emissions [4]. The major advantage of utilizing hydrated ethanol as a fuel is that the net energy gain improves from 21 to 55% of the heating value of ethanol and its co-products, since significant energy must be expended to remove water during production. This is required because wet ethanol is not suitable for conventional combustion engines. For example, spark ignition engines demand the use of pure ethanol because the dilution caused by water reduces the flame speed, resulting in misfire and problems due to condensation. The present study uses numerical simulations to explore the use of wet ethanol for Reactivity Controlled Compression Ignition (RCCI) operation in a heavy duty diesel engine. RCCI uses in-cylinder blending of a low reactivity fuel with a high reactivity fuel and has demonstrated significant fuel efficiency and emissions benefits using a variety of fuels, including gasoline and diesel. Combustion timing is controlled by the local blended fuel reactivity (i.e. octane number), and the combustion duration can be controlled by establishing optimized gradients in fuel reactivity in the combustion chamber. In the present study, the low reactivity fuel was hydrated ethanol while the higher reactivity fuel was diesel. First, the effect of water on ethanol/water/diesel HCCI was investigated using GT-Power and single-zone CHEMKIN simulations. The results showed that the main impact of the water in the ethanol is to reduce the IVC temperature due to vaporization cooling. Next, multidimensional engine modeling was performed using the KIVA code at engine loads from 5 to 17 bar IMEP at 1300 rev/min with various grades of hydrated ethanol and a fixed diesel fraction of the total fuel. The results show that hydrated ethanol can be used in a RCCI engine with gross indicated thermal efficiencies up to 55% and very low emissions. A 70/30 ethanol/water mixture (by mass) was found to yield the best results across the entire load range without the need for EGR.
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