Relevant bibliographies by topics / Chemical investigation

Contents

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

Academic literature on the topic 'Chemical investigation'

Author: Grafiati
Published: 4 June 2021
Last updated: 20 February 2023

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Journal articles on the topic "Chemical investigation"

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Ganguly, A., R. Choudhury, S. Mitra, and Anjan Bhattacharyya. "Chemical Investigation ofCassia mimosoides." Planta Medica 51, no. 06 (December 1985): 540. http://dx.doi.org/10.1055/s-2007-969598.

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Syrchina, A. I., A. A. Semenov, and S. V. Zinchenko. "Chemical investigation ofCirsium setosum." Chemistry of Natural Compounds 33, no. 2 (March 1997): 212. http://dx.doi.org/10.1007/bf02291547.

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Ina, Hiroji, Ayako Asai, Hideo Iida, and Toshiko Ushida. "Chemical Investigation ofHydrocotyle sibthorpioides." Planta Medica 53, no. 02 (April 1987): 228. http://dx.doi.org/10.1055/s-2006-962684.

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Kadhim, Alaa Jawad. "Thiazole Amide Derivatives (Synthesis, Spectral Investigation, Chemical Properties, Antifungal Assay)." NeuroQuantology 18, no. 1 (January 30, 2020): 16–25. http://dx.doi.org/10.14704/nq.2020.18.1.nq20102.

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C. L. Jambhale, C. L. Jambhale. "Fabrication of Spinel Ferrite Film by Chemical Method: Its Structural Investigation." Indian Journal of Applied Research 3, no. 5 (October 1, 2011): 540–43. http://dx.doi.org/10.15373/2249555x/may2013/175.

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Ma, Li Xing. "Bitumen Rheological and Chemical Investigation." Key Engineering Materials 891 (July 6, 2021): 190–95. http://dx.doi.org/10.4028/www.scientific.net/kem.891.190.

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This paper is to study the mechanism of aging on the Rheological and Chemical Investigation of the bitumen and make correlations with the actual field behavior of the binder. The effects of ageing on rheological properties of asphalt has been studied by Bending Beam Rheometer(BBR). The objective of conducting these tests is to evaluate the performance of the bitumen in an aged and unaged states in relation to the effects of traffic speed and/or pavement temperature, traffic volume (number of load repetitions), and (thermal/load) cracking behavior.
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Kaweetripob, Wirongrong, Chulabhorn Mahidol, Hunsa Prawat, and Somsak Ruchirawat. "Chemical Investigation Of Mammea Siamensis." Pharmaceutical Biology 38, sup1 (December 2000): 55–57. http://dx.doi.org/10.1076/phbi.38.6.55.5954.

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Chernenko, T. V., N. T. Ul’chenko, A. I. Glushenkova, and D. Redzhepov. "Chemical investigation of Callisia fragrans." Chemistry of Natural Compounds 43, no. 3 (May 2007): 253–55. http://dx.doi.org/10.1007/s10600-007-0098-x.

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Aksel'rud, G. A., Ya M. Gumnitskii, and S. Mallik. "Investigation of chemical nucleate boiling." Journal of Engineering Physics 52, no. 2 (February 1987): 147–50. http://dx.doi.org/10.1007/bf00870752.

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Du, Jing-Ling, Yong-Sheng Jin, Li-Ming Qiao, Li Jin, and Hai-Sheng Chen. "Chemical investigation of Ervatamia yunnanensis." Chemistry of Natural Compounds 46, no. 3 (July 2010): 459–61. http://dx.doi.org/10.1007/s10600-010-9644-z.

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Dissertations / Theses on the topic "Chemical investigation"

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Porter, Joshua D. "A Chemical Investigation of Australian Winteraceae." Thesis, Griffith University, 2022. http://hdl.handle.net/10072/419713.

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The Winteraceae are a small primitive family of angiosperms endemic to the cool rainforests and montane subtropics of South America, Melanesia, Australasia, and South-East Asia below the Wallace line.The medicinal value of Winteraceae plants branches from extensive use in traditional medicine regimens to use in modern clinical applications. Nonvolatile drimane sesquiterpenes do not occur broadly in nature. However, they are reported to be a chemotaxonomic characteristic of the Winteraceae. Many of those identified from the Winteraceae comprise structural features that are either unique to the family or identified from a minimal number of natural sources.3 Biological investigations on the drimane structure class have identified several activities attractive for drug discovery and may be linked to their usefulness in traditional medicines. Bubbia and Tasmannia are the only Winteraceae genera with species endemic to Australia. Except for Tasmannia lanceolata and studies on the essential oil content of both genera, the chemistry of the Australian Winteraceae is poorly studied and remains an unexploited source of potentially new biologically active natural products.The primary aim of this thesis was to investigate the chemistry of unexplored Australian Winteraceae species to identify new drimane sesquiterpene natural products and improve the current knowledge of the chemistry of Australian Winteraceae. This was achieved by exploring the chemistry of two Australian Winteraceae species.
Thesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Environment and Sc
Science, Environment, Engineering and Technology
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Ngai, Courtney L. "An Investigation of Chemical Identity Thinking." Thesis, University of Massachusetts Boston, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10265119.

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Chemical identity is a foundational crosscutting concept in chemistry and encompasses the knowledge, reasoning, and practices relevant for the classification and differentiation of substances. Substances are found everywhere – from the chemistry classroom to the kitchen at home – so classification and differentiation of substances is important for everyday decisions as well as challenges that are solved using chemistry. An understanding of chemical identity, then, is essential for scientifically literate citizens in addition to students training to be chemists. A better understanding of how chemical identity thinking develops could be used to inform instruction and education research, with the intent of producing students and citizens who can use their chemical knowledge to reason with in order to practice chemical identity thinking.

This thesis characterizes chemical identity thinking from the perspective of chemical identity knowledge and chemical identity practices, both of which contribute to chemical identity thinking. First, the literature is examined for existing research on how students perceive substances and chemical identity, and a hypothetical learning progression for chemical identity thinking is proposed. This is followed by the design of a qualitative instrument, the CSI Survey, to capture the chemical identity practices exhibited by students at a range of education levels (8th grade – 4th year university). The data collected using the CSI Survey are analyzed using content analysis. Eight unique themes corresponding to chemical identity practices (the application of chemical identity knowledge and reasoning) are revealed by this analysis (change, class, composition and structure, function, organism effect, sensory information, source, tests and experimental values). The application of chemical identity knowledge in biochemical contexts by both expert biochemists and biochemistry students is investigated in the final chapter, and the chemical identity knowledge observed in the biochemical contexts is characterized using the eight themes of chemical identity practices. Suggestions are offered on how the products of the research on chemical identity thinking can be used to inform decisions in both instruction and research.

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Burton, Stephanie Gail. "A chemical investigation of Tulbaghia Violacea." Thesis, Rhodes University, 1990. http://hdl.handle.net/10962/d1015725.

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Tulbaghia violacea, a member of the family Alliaceae is indigenous to the Eastern Cape and is widely used as a herbal remedy for various febrile and gastro-enteric ailments, particularly in young children. Adverse effects, and even fatalities, have been reported following treatment with the plant extract. The project has involved synthesis of model compounds, chromatographic analysis of flavonoid and other constituents of the plant, and examination of the volatile components. Some fifteen flavones were synthesised as chromatographic models and in the course of this work, the development of a new method for synthesis of carboxylic anhydrides was completed. Use of the flavone standards permitted identification of the flavonols kaempferol and quercetin in hydrolysed glycosidic plant extracts. In addition, several sugars were identified, viz., D-glucose, D-fructose, L-arabinose and D-galactose as free sugars, and D-glucose, D-galactose , 1-rhamnose, D- fucose, D-xylose, 1-arabinose and D-fructose as glycosidic sugars, by g.l.c. and g. c. - m. s. analysis of derivatives of isolated sugar mixtures. The presence in the plant extracts of steroidal saponins was also demonstrated. The sulphur compounds, 2,4,5,7-tetrathiaoctane-2,2-dioxide and 2,4,5,7-tetrathiaoctane were isolated from the plant and characterised spectroscopically. This result, together with analysis of volatiles from the plant, has led to a proposal concerning the nature and origin of sulphur compounds in Tulbaghia violacea, showing close correlation with the sulphur compounds in Allium species. Investigation of the biological activity of Tulbaghia violacea extracts showed bacteriostatic activity, particularly of extracts which had not been heated, and which had been prepared from mature plants. Treatment of isolated smooth muscle preparations with Tulbaghia violacea extracts indicated the presence of a β-adrenergic agonist having an inhibitory effect on normal muscle contraction. The results of the investigations indicate that while there may be some basis for use of the plant as an antibacterial, or to treat colic, the adverse effects, caused possibly by the sulphur compounds and/or steroidal saponins present, may override the beneficial effects.
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Hagos, Selam. "Chemical Investigation of Bioactive Marine Extracts." Scholar Commons, 2018. https://scholarcommons.usf.edu/etd/7301.

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Natural products have been a fundamental source of medicinal scaffolds for decades; with sixty percent of marketed drugs. Many synthetic chemists are focused on synthesizing potent and nontoxic compounds for pharmaceutical targets, however, nature is still proving to be a source of new bioactive compounds. Produced by the host organism for defense, reproduction and communication, secondary metabolites also demonstrate promising bioactivity against human pathogens. Hence, natural product chemists continue their quest for new leads. As a continuation of these efforts, this thesis attempts to explore fungi and sponges for new chemistry, and ultimately, new drug candidates. Antarctica is largely untapped; hence herein two Antarctic sponges were chemically investigated. This resulted in isolation and characterization of two metabolites. Concurrently, chemical investigation of fungus, from Floridian mangrove species, resulted in the isolation of two structurally diverse metabolites. Further, a dereplication process was applied to MPLC fractions, which lead to the identification of known metabolites and mycotoxins. This enabled prioritization of fractions for future studies.
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Ge, Daozhi. "Chemical Investigation of Plant Taxodium ascendens." Thesis, Griffith University, 2018. http://hdl.handle.net/10072/380674.

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Anticancer activity screening of an extract library containing 152 traditional Chinese medicines (TCM) has identified one crude extract from Taxodium ascendens with potent activity. The overall aim of the project was to investigate the chemical composition of the TCM extract and to evaluate the activities of the natural products against cancer cell lines. In Chapter1, it introduces the background of traditional medicines & natural products and also exemplifies several nature-derived-drugs. A review based on anticancer drugs derived from natural products and the importance of natural origin compounds against cancer were also discussed. A high throughput screening assay for 152 TCMs suggested the potential anti-breast cancer activities of MeOH and EtoAc extracts of Taxodium ascendens. Therefore, it was selected for large scale chemical investigation. Chapter 2 details the large scale isolation and structure elucidation of pure natural products from Taxodium ascendens extract. A total of 15 compounds were isolated from 6.25 grams of crude extract. They represented four structural classes including diterpenes, flavonoids, terpene acids and aromatic acids. The structures of the compounds were elucidated via 1D- and 2D-NMR and Mass spectroscopic data. Cytotoxic assays of three compounds were tested against a breast cancer cell line, T-47D. One compound, 6-hydroxy-5,6-dehydrosugiol (2.23), showed potent activity against T-47D with an IC50 value of 8.24 M. The physical chemical properties of all the isolated compounds were also evaluated against Lipinski’s rule of five. The detailed experimental procedures can be found in Chapter 3. In conclusion, 15 pure natural products were isolated with 6-hydroxy-5,6-dehydrosugiol (2.23) showing potent anticancer activity.
Thesis (Masters)
Master of Science (MSc)
School of Environment and Sc
Science, Environment, Engineering and Technology
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Loehn, Clayton William. "Investigation of the monazite chemical dating technique." Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/27688.

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In order to evaluate the electron microprobe (EMP) method for chemical dating of monazite, we chemically analyzed selected suites of monazite grains that were previously dated by standard U/Pb isotopic methods at three laboratories each equipped with a sensitive high resolution ion microprobe (SHRIMP). Representing diverse igneous and metamorphic lithologies, these grains yielded conventional isotopic ages ranging in age from Neoarchean to Devonian. Chemical dating was performed at Virginia Tech using a Cameca SX-50 EMP in which the analytical routines and settings were specifically optimized for monazite geochronology, including correction of analytical peaks for all major spectral interferences and correction of peak intensities for local background emission. Placement of cross-grain analytical traverses was based on backscattered electron (BSE) images together with wavelength-dispersive (WD) generated X-ray maps for Y, Th, U, and Ca, which revealed the internal compositional complexity of each grain. Shorter EMP traverses were selected adjacent to each SHRIMP pit in order to provide the best possible comparison of ages obtained by the two dating methods. Synthesis protocol for key elemental measurements (Y, Th, U, and Pb) was developed utilizing the 1Ï elemental errors associated with individual analyses, providing an objective approach for data synthesis. Analytical dates were either accepted or excluded based on analytical and spatial justifications. Isotopic dating techniques utilize three independent age calculations, provided the sample is old enough to have accumulated sufficient 207Pb (i.e., â ¥~1000 Ma). Similarly, the chemical dating method can utilize two independent age calculations (i.e., Th/Pb and U/Pb) and a U-Th-Pbtotal centroid age in Th/Pb vs. U/Pb space, verified independently against the calculated Th* or U* CHIME ages. Across the entire 2,200 m.y. age range represented by the sample set, the chemical ages calculated from the EMP data chemical ages are internally consistent (within 2Ï error) with the previously measured SHRIMP isotopic ages, except in one case where bulk mixing of discrete age domains within an ablation pit led to an isotopically discordant apparent age. Overall, this study illustrates that EMP chemical dating (1) represents both an accurate and precise primary method for dating monazite from igneous and polymetamorphic terrains; (2) provides superior spatial resolution for obtaining meaningful ages from small and/or irregular domains of discrete age that may be irresolvable or misinterpreted by other dating techniques that sample larger volumes; and (3) illuminates the geological meaning of isotopically discordant monazite ages obtained using conventional methods with lower spatial resolution (e.g., SHRIMP).
Ph. D.
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Park, Young Chul. "Chemical Investigation of Three Antarctic Marine Sponges." Scholar Commons, 2004. https://scholarcommons.usf.edu/etd/1190.

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This thesis describes the chemical investigation of three marine sponges from Antarctica and the total syntheses of natural products erebusinone (12) and its derivative, erebusinonamine (52). Investigation of the yellow Antarctic marine sponge Isodictya setifera resulted in the isolation of two secondary metabolites, purine analog (32) and 3-hydroxykynurenine (24). Chemical investigation of Isodictya setifera led to the isolation of six secondary metabolites which included 5-methyl-2-deoxycytidine (25), uridine (28), 2-deoxycytidine (31), homarine (37), hydroxyquinoline (33), 3-hydroxykynurenine (24). The latter two compounds were found to be intermediates of tryptophan catabolism in crustaceans. From the Antarctic marine sponge Isodictya antractica ceramide analog (39) was isolated and its chemical structure was assigned by a combination of spectroscopic and chemical analyses. Stereochemistry was determined by modified Mosher's method. Erebusinone (12), a yellow pigment isolated from the Antarctic marine sponge Isodictya erinacea has been implicated in molt inhibition and mortality against the Antarctic crustacean amphipod, Orchomene plebs, possibly serving as a precursor of a xanthurenic acid analog. Thought to act as a 3-hydroxykynurenine 24 mimic, erebusinone (12) may be involved chemical defense. This appears to be the first example in the marine realm of an organism utilizing tryptophan catabolism to modulate molting as a defensive mechanism. To further investigate the bioactivity and ecological role of erebusinone (12), the synthesis of this pigment was carried out in an overall yield of 44% involving seven steps which were economical and convenient. Erebusinonamine (52) was also similarly synthesized in eight steps with an overall yield of 45%.
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Phatak, Nisarga Laxman. "Chemical investigation of fungicolous and endophytic fungi." Diss., University of Iowa, 2014. https://ir.uiowa.edu/etd/4719.

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Fungi have been an important source of many structurally diverse and biologically active secondary natural products. These secondary metabolites have found applications in pharmaceutical and agriculture industry. Fungi are estimated to be second only to insects in species diversity. It is estimated that there are at least 3.5 million species of fungi of which a less than 5% have so far been explored. Fungi are known to produce many secondary natural metabolites, however their role has still not been clearly understood. However it is possible that fungi which often thrive in competitive environments would experience evolutionary pressure to produce such metabolites for defensive or offensive functions. Our research focusses on isolation and structure elucidation of secondary metabolites from endophytic and mycoparasitic/fungicolous fungi. Mycoparasitic and fungicolous fungi are those that colonize other fungi, and could be potential sources of antifungal agents because of the negative effects exerted on their hosts due to this colonization. Endophytic fungi are those that colonize the inner tissues of plants in a symbiotic or a non-symbiotic manner. They may or may not be necessary for the growth, defense and survival of the host. They may protect the plants from attack by other pathogens by producing secondary metabolites that inhibit the growth of other pathogenic organisms. Many biologically active secondary metabolites have been isolated from various members of these two classes of fungi. During the course of this research fourteen new and several known compounds representing various biosynthetic classes including peptides, polyketides, terpenoids, and compounds with mixed biogenetic origins have been isolated and characterized using various tools such as NMR and MS. Details of the isolation, structure elucidation, and biological activity of these new compounds are presented in this thesis. Structure elucidation was performed mainly by analysis of various MS and NMR data, along with chemical derivatization reactions and/or X-ray diffraction analysis data. Absolute configuration assignments were made using, X-ray crystallography, and/or by ECD spectral analysis in combination with computational analysis.
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Wang, Qianhe. "Investigation of Acrylated Alkyds." University of Akron / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=akron1366047898.

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Huang, Wei Hua. "Chemical investigation on root barks of Oplopanax horridus." Thesis, University of Macau, 2012. http://umaclib3.umac.mo/record=b2590373.

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Books on the topic "Chemical investigation"

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United States International Trade Commission. Calcium hypochlorite from Japan: Determinations of the Commission in investigation no. 731-TA-189 (final) under the Tariff Act of 1930, together with the information obtained in the investigation. Washington, D.C: U.S. International Trade Commission, 1985.

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United States International Trade Commission. Industrial phosphoric acid from Belgium and Israel: Determinations of the Commission in investigation no. 701-TA-286 (final) under the Tariff Act of 1930, together with the information obtained in the investigation; determinations of the Commission in investigations nos. 731-TA-365 and 366 (final) under the Tariff Act of 1930, together with the information obtained in the investigations. Washington, DC: U.S. International Trade Commission, 1987.

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Ilene, Hersher, ed. Industrial phosphoric acid from Belgium and Israel: Determinations of the Commission in investigation no. 701-TA-286 (final) under the Tariff Act of 1930, together with the information obtained in the investigation; determinations of the Commission in investigations nos. 731-TA-365 and 366 (final) under the Tariff Act of 1930, together with the information obtained in the investigations. Washington, DC: U.S. International Trade Commission, 1987.

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Howard, Maskill, ed. The investigation of organic reactions and their mechanisms. Oxford: Blackwell Pub., 2006.

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United States. Department of Defense. ARCENT suspected chemical weapons sites investigation: Close-out report. [Washington, D.C.]: Dept. of Defense, 2000.

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Patel, Vinodkumar Hiralal. Chemical kinetic investigation of a commercial batch reactor process. Birmingham: Aston University.Department of Chemical Engineering, 1987.

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Günther, Holzer, and Sellers Clara Suzanne, eds. Chemical analysis for the arson investigator and attorney. Heidelberg: Hüthig, 1993.

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Williams, Robin. Genetic policing: The use of DNA in chemical investigations. Cullompton, UK: Willan Pub., 2007.

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F, Bernasconi Claude, ed. Investigation of rates and mechanisms of reactions. 4th ed. New York: Wiley, 1986.

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United States. Department of Defense. Retrograde equipment investigation: Close-out report. [Washington, D.C.]: Dept. of Defense, 2000.

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Book chapters on the topic "Chemical investigation"

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Saha, Rahul, Pankaj Tiwari, and Ramgopal V. S. Uppaluri. "Alkali Flooding – Mechanisms Investigation." In Chemical Nanofluids in Enhanced Oil Recovery, 29–43. Boca Raton: CRC Press, 2021. http://dx.doi.org/10.1201/9781003010937-2.

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Seidel-Morgenstern, Andreas. "Analysis and Experimental Investigation of Catalytic Membrane Reactors." In Integrated Chemical Processes, 359–89. Weinheim, FRG: Wiley-VCH Verlag GmbH & Co. KGaA, 2005. http://dx.doi.org/10.1002/3527605738.ch12.

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Budde, F., T. F. Heinz, M. M. T. Loy, J. A. Misewich, and B. D. Smith. "Pump-Probe Investigation of Femtosecond Desorption." In Springer Series in Chemical Physics, 377–79. Berlin, Heidelberg: Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-84269-6_115.

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Gafni, Gilad, Alexander Kuznetsov, and Benveniste Natan. "Experimental Investigation of an Aluminized Gel Fuel Ramjet Combustor." In Chemical Rocket Propulsion, 297–315. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-27748-6_12.

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Palchetti, Ilaria, and Marco Mascini. "Nucleic Acid Based Electrochemical Biosensors for Multiplexed Investigation of Bioagents." In Portable Chemical Sensors, 139–49. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-2872-1_7.

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Vineis, Paolo, and Benedetto Terracini. "Epidemiological Approach to the Investigation of Mechanisms of Action in Human Bladder Carcinogenesis." In Chemical Carcinogenesis, 657–61. Boston, MA: Springer US, 1988. http://dx.doi.org/10.1007/978-1-4757-9640-7_70.

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Likhtenshtein, Gertz I. "Physical Methods of Investigation of Metalloenzymes." In Chemical Physics of Redox Metalloenzyme Catalysis, 15–44. Berlin, Heidelberg: Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-73100-6_2.

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Perkampus, Heinz-Helmut. "Investigation of the Kinetics of Chemical Reactions." In UV-VIS Spectroscopy and Its Applications, 165–214. Berlin, Heidelberg: Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/978-3-642-77477-5_7.

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Ding, Zhu, Zong Jin Li, and Feng Xing. "Chemical Durability Investigation of Magnesium Phosphosilicate Cement." In Environmental Ecology and Technology of Concrete, 275–81. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-983-0.275.

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Gutsev, G. L., and A. I. Boldyrev. "The Theoretical Investigation of the Electron Affinity of Chemical Compounds." In Advances in Chemical Physics, 169–221. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2007. http://dx.doi.org/10.1002/9780470142851.ch3.

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Conference papers on the topic "Chemical investigation"

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Chobit, Maksym, Yuriy Panchenko, and Victor Vasylyev. "The Investigation of Hydrogels Composite Filling by Gelatin." In Chemical technology and engineering. Lviv Polytechnic National University, 2019. http://dx.doi.org/10.23939/cte2019.01.133.

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Zhu, Zhimin, Joyce Lowes, Vandana Krishnamurthy, and Dan Sullivan. "Investigation of chemical effects in lithography." In 2016 China Semiconductor Technology International Conference (CSTIC). IEEE, 2016. http://dx.doi.org/10.1109/cstic.2016.7463971.

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Wakabayashi, M., S. Yokojima, T. Fukaminato, K. Ogata, and S. Nakamura. "Theoretical investigation on single-molecule chiroptical spectroscopy." In SOLAR CHEMICAL ENERGY STORAGE: SolChES. AIP, 2013. http://dx.doi.org/10.1063/1.4848093.

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Shulga, S., N. Sigareva, and N. Мoshkivska. "Synthesis and investigation of dispersed metal oxide-graphene photoelectrode material." In Chemical technology and engineering. Lviv Polytechnic National University, 2019. http://dx.doi.org/10.23939/cte2019.01.305.

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Batnasan, Bayaraa, Ganzaya Gankhurel, and Dolmaa Gania. "Chemical Composition of Peloid from Lake Khyargas." In 5th International Conference on Chemical Investigation and Utilization of Natural Resource (ICCIUNR-2021). Paris, France: Atlantis Press, 2021. http://dx.doi.org/10.2991/ahcps.k.211004.009.

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Asadi, Mahmoud, Tyler Blair, and Sarah Comstock. "Laboratory Investigation of Chemical Tracers vs. DNA Tracers." In SPE Annual Technical Conference and Exhibition. SPE, 2022. http://dx.doi.org/10.2118/209954-ms.

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Abstract A new and robust tracer technology is introduced based on encapsulated Nano-sized synthetic DNA. This cutting-edge technology enables bonding of synthetic DNA strands with unique sequences to a magnetic core particle and encapsulating them with silica making it possible to have unlimited number of identifiable tracers, each with a unique signature. Each manufactured batch of DNA tracer is then coated with a special chemical to make the batch water-wet or oil-wet. The presented novel technology of encapsulated Nano-sized DNA tracers is shown to be superior to the currently used water chemical tracers, fluorobenzoic acid or FBA, in many ways both in the applications of EOR and flowback analyses in hydraulic fracturing. Unlike the chemical tracers, the DNA tracers don't partition, don't chemically react with the formation minerology, don't disintegrate with time, are stable at high reservoir temperatures and don't lag flood front velocity if used in secondary recovery projects such as waterflooding. In addition, unlike the available limited number of chemical tracers, there are unlimited number of identifiable DNA tracers. In waterflooding, the DNA tracers are used to characterize fluid flow accurately and precisely in a reservoir and to identify heterogeneity of the reservoir. The technology can also be used to evaluate flowback analyses in hydraulic fracturing to fully understand fracture behavior, pipeline leakage identification, groundwater movement, contamination tracking in water streams, etc.
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Vashkurak, Ulyana, and Liliya Shevchuk. "Investigation the kinetics of the process of destruction organic contaminations wastewater production margarine." In Chemical technology and engineering. Lviv Polytechnic National University, 2019. http://dx.doi.org/10.23939/cte2019.01.207.

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Choudhary, R. B. "An Investigation on Tribo-Chemical Reactions of AF/AW Additive Compounds of Alkyl ThioOctadecenoate Origin." In Annual International Conference on Chemistry, Chemical Engineering and Chemical Process. Global Science & Technology Forum (GSTF), 2013. http://dx.doi.org/10.5176/2301-3761_ccecp.04.

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Hetaba, Walid. "Chemical investigation of contamination in transmission electron microscopy." In European Microscopy Congress 2020. Royal Microscopical Society, 2021. http://dx.doi.org/10.22443/rms.emc2020.1072.

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Khaynovskaya, N. V., and A. V. Kamenskaya. "Investigation process of preferential chemical etching of GaAs." In 2005 International Siberian Workshop and Tutorials on Electron Devices and Materials . 6th Annual. IEEE, 2005. http://dx.doi.org/10.1109/sibedm.2005.195581.

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Reports on the topic "Chemical investigation"

1

McCarthy, Thomas J. Investigation of Chemical and Physical Properties of Surface; Modified Chemically Resistant Polymers. Fort Belvoir, VA: Defense Technical Information Center, September 1992. http://dx.doi.org/10.21236/ada284616.

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Simmons, Catherine J., and Joseph H. Simmons. Investigation of Chemical Durability Mechanism in Fluoride Glasses. Fort Belvoir, VA: Defense Technical Information Center, December 1985. http://dx.doi.org/10.21236/ada162740.

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Gottfried, Jennifer L. Investigation of Chemical Processes Involving Laser-generated Nanoenergetic Materials. Fort Belvoir, VA: Defense Technical Information Center, February 2010. http://dx.doi.org/10.21236/ada516682.

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Rushing, John F., J. K. Newman, and Timothy J. McCaffrey. Laboratory Investigation of Chemical Dust Pallative Performance on Sandy Soil. Fort Belvoir, VA: Defense Technical Information Center, June 2007. http://dx.doi.org/10.21236/ada469306.

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Greenwood, Michael Scott, Askin Guler Yigitoglu, Jordan D. Rader, Whitney Tharp, Mike Poore, Randy Belles, Bob Zhang, Riley Cumberland, and Mike Muhlheim. Integrated Energy System Investigation for the Eastman Chemical Company, Kingsport, TN Facility. Office of Scientific and Technical Information (OSTI), May 2020. http://dx.doi.org/10.2172/1643929.

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Greenwood, Michael, Askin Guler Yigitoglu, Jordan Rader, Whitney Tharp, Willis Poore III, Randy Belles, Bob Zhang, Riley Cumberland, and Michael Muhlheim. Integrated Energy System Investigation for the Eastman Chemical Company, Kingsport, Tennessee Facility. Office of Scientific and Technical Information (OSTI), May 2020. http://dx.doi.org/10.2172/1649227.

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Shelton, William, and Ye Xu. Theoretical investigation of surface chemical reactivity of compositionally disordered multi-metallic alloys. Office of Scientific and Technical Information (OSTI), January 2023. http://dx.doi.org/10.2172/1908561.

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Patel, Denise, Doun Moon, Neil Tangri, and Monica Wilson. All Talk and No Recycling: An Investigation of the U.S. “Chemical Recycling” Industry. Global Alliance for Incinerator Alternatives, July 2020. http://dx.doi.org/10.46556/wmsm7198.

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Meyer, Matthew W. Scanning angle Raman spectroscopy: Investigation of Raman scatter enhancement techniques for chemical analysis. Office of Scientific and Technical Information (OSTI), January 2013. http://dx.doi.org/10.2172/1082977.

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Author, Not Given. Remedial investigation for the chemical plant area of the Weldon Spring Site. Volume 2. Office of Scientific and Technical Information (OSTI), November 1992. http://dx.doi.org/10.2172/10162702.

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