Academic literature on the topic 'Naturally occuring'

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Journal articles on the topic "Naturally occuring"

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Matthews, G. A. "Naturally occuring pest bioregulators." Endeavour 15, no. 3 (January 1991): 143. http://dx.doi.org/10.1016/0160-9327(91)90172-8.

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Huskić, Igor, and Tomislav Friščić. "Naturally occuring metal-organic frameworks." Acta Crystallographica Section A Foundations and Advances 71, a1 (August 23, 2015): s57—s58. http://dx.doi.org/10.1107/s2053273315099131.

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Raju, B., and Anil Saikia. "Asymmetric Synthesis of Naturally Occuring Spiroketals." Molecules 13, no. 8 (August 28, 2008): 1942–2038. http://dx.doi.org/10.3390/molecules13081942.

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Elkhalifa, Mohamed Y., Dalal Alhababi, Samira Abdulla Saleh, Aisha Khan, Zahra Ashur, and Nisreen Alshaibi. "P221 “Naturally occuring” anti-HLA antibodies." Human Immunology 78 (September 2017): 217. http://dx.doi.org/10.1016/j.humimm.2017.06.281.

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Nyiredy, Sz, K. Dallenbach-Tölke, K. Nyiredy-Mikita, S. Mészáros, and O. Sticher. "Rotachrom-Analytical Separations of Naturally Occuring Compounds." Planta Medica 52, no. 06 (December 1986): 534–35. http://dx.doi.org/10.1055/s-2007-969329.

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Fatel, G. F., and K. N. Trivedi. "A Convenient Synthesis of Naturally Occuring Xanthones." Synthetic Communications 19, no. 9-10 (June 1989): 1641–47. http://dx.doi.org/10.1080/00397918908051061.

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Gribble, Gordon. "Erratum - "Naturally Occuring Organthalogen Compounds - A Survey"." Journal of Natural Products 56, no. 4 (April 1993): 636. http://dx.doi.org/10.1021/np50094a032.

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Reich, Johannes, Felix Weyer, Hiroshi Tamura, Isao Nagaoka, and Hubert Motschmann. "Low Endotoxin Recovery—Masking of Naturally Occuring Endotoxin." International Journal of Molecular Sciences 20, no. 4 (February 15, 2019): 838. http://dx.doi.org/10.3390/ijms20040838.

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Endotoxins are cell wall components of Gram-negative bacteria. A release of endotoxins into the human blood stream results in an inflammation reaction that can lead to life-threatening conditions like sepsis. Therefore, control for endotoxin contamination of intravenously administered drugs is crucial. Drugs are usually tested for putative endotoxin contamination with Limulus-based tests. However, validity of the compendial test procedures is questioned in the case of low endotoxin recovery (LER). To assure validity, regulatory authorities request hold-time studies of endotoxin in addition to pharmacopoeial requirements. Within these studies, endotoxin is added (spiked) to an undiluted product. The spiked product is held for a certain period of time and subsequently diluted for endotoxin determination. Due to the known heterogeneity of endotoxin the question has been raised as to which source represents the most adequate endotoxin spike. In the present study, endotoxin hold-time studies were analyzed by using different sources of endotoxin. Highly purified endotoxin, crude endotoxin extracts (Naturally Occurring Endotoxin) from different bacterial species and varied growth conditions as well as endogenous endotoxin contaminations were investigated. The results clearly demonstrate that endotoxin masking—an effect of LER—is dependent on the endotoxin source used. Various parameters such as bacterial strain and growth conditions lead to different masking susceptibilities. Due to these effects it is impossible to predict the susceptibility of bacterial endotoxin contamination to LER. In order to determine whether a sample is prone to LER, an endotoxin spike that is susceptible to LER is required.
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Kumar, Avinash. "Alkaline earth metal complex with naturally occuring substrate." Asian Journal of Research in Chemistry 13, no. 4 (2020): 253. http://dx.doi.org/10.5958/0974-4150.2020.00049.8.

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ZOWGHI, E., and A. EBADI. "Naturally occuring Brucella melitensis infection in cattle in Iran." Revue Scientifique et Technique de l'OIE 4, no. 4 (December 1, 1985): 811–14. http://dx.doi.org/10.20506/rst.4.4.219.

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Dissertations / Theses on the topic "Naturally occuring"

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Delashob, Hemen, and Björn Elmström. "Liquified Natural Gas Marine Fuel : Naturally Occuring Radioactive Material." Thesis, Linnéuniversitetet, Sjöfartshögskolan (SJÖ), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-84206.

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There seems to be enough information available on how different types of radiation may affect human health. There also seems to be adequate research made about NORM and how to handle this phenomenon. The image put forth by this study shows that the appearance of NORM within affected industries do not appear surprising or difficult to deal with. On the contrary it seems to be a well-known issue and safety measures have been adapted accordingly. It appears as if these issues have been overlooked regarding the systems where LNG is being used as a marine fuel. There is not enough data to conclude whether NORM is an issue or not in such systems.
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Jaunet, Alex. "Synthetic approaches to naturally occuring cyclohexenone epoxides." Thesis, University of Sheffield, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.505527.

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Critchley, Trevor. "Synthetic studies towards naturally occuring antihypercholesterolaemic agents." Thesis, University of Nottingham, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.299552.

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Khan, R. A. "Synthesis of naturally occuring chromones and quinones." Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 1992. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/3015.

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Toll, D. G. "The behaviour of unsaturated compacted naturally occuring gravel." Thesis, Imperial College London, 1988. http://hdl.handle.net/10044/1/8006.

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McErlean, Christopher Stephen Paschal. "Synthesis and biosynthesis of some naturally occuring oxygen heterocycles /." [St. Lucia, Qld.], 2002. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe17082.pdf.

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Pooley, G. R. "Studies on the synthesis of naturally occuring cis-enynes." Thesis, University of Cambridge, 1991. https://www.repository.cam.ac.uk/handle/1810/272501.

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Green, Donald F. (Donald Frederick) 1969. "Haptic simulation of naturally occuring textures and soil properties." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/9599.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1998.
Includes bibliographical references (p. 69-71).
Methods for developing realistic haptic (force feedback) simulations of soils and rocks are presented. Mathematical models of the dynamics of a virtual probe mechanically interacting with a virtual object are developed to provide the basis for analysis and simulation. The models then incorporate stochastic inputs in order to provide the haptic simulations with a more natural, less synthetic feel. The stochastic input parameters are derived by analyzing actual force data sensed while probing a subject media with the haptic display itself; in this case used as a force controlled manipulator. A method for sensing friction properties of rigid, textured surfaces and using the data collected to drive a realistic haptic texture simulation is presented. Static friction coefficients and surface height deviations a e sensed by directly stroking the surface under examination with a probe fitted on the end of a PHANToM haptic display device. Test surfaces range from pieces of sandpaper of varying coarseness to acetate. A simulation of the texture may then be rendered using the mechanical model of textured surface-probe interaction augmented by statistical variation of the friction properties of the surface. An algorithm is presented for adding texture properties to three-dimensional object models. The method is based on determining surface normals of the virtual object and assigning statistically varying friction properties and surface height deviations to area patches on the object's surface using the methods described above. Finally, a dynamic model of probe/soil interaction is used to render a haptic simulation of loose grained soils such as sand. Certain friction properties are again statistically varied in order to improve the realism of haptic display user's experience.
by Donald F. Green.
S.M.
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Mullins, Alastair Patrick. "The interaction of metal ions with naturally occuring phenolic compounds." Thesis, University of Reading, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.306807.

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Macdonald, Gregor James. "The synthesis of naturally occuring antibiotics of the manumycin group." Thesis, University of York, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.242164.

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Books on the topic "Naturally occuring"

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National Research Council (U.S.). Committee on Evaluation of EPA Guidelines for Exposure to Naturally Occurring Radioactive Materials., ed. Evaluation of guidelines for exposures to technologically enhanced naturally occuring radioactive materials. Washington, DC: National Academy Press, 1999.

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1951-, Lusty James R., Wearden Peter, and Moreno Virtudes, eds. CRC handbook of nucleobase complexes: Transition metal complexes of naturally occuring nucleobases and their derivatives. Boca Raton, Fla: CRC Press, 1990.

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Haan, Ellen de. Aging in place: The development of naturally occurring retirement communities. Alexandria, VA: Community Associates Institute, 1998.

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Naturally occurring retirement communities: A model for aging in place : hearing before the Subcommittee on Retirement Security and Aging of the Committee on Health, Education, Labor, and Pensions, United States Senate, One Hundred Ninth Congress, second session, on examining naturally occurring retirement communities and what impact they may have on the ability to create livable community options for all Americans, May 16, 2006. Washington: U.S. G.P.O., 2006.

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Marasas, W. F. O. Mycotoxicology: Introduction to the mycology, plant pathology, chemistry, toxicology, and pathology of naturally occuring mycotoxicoses in animals and man. University Park: Pennsylvania State University Press, 1987.

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Limited, SENES Consultants. Probabilistic estimates of dose and indoor radon concentrations attributable to remediated oilfield naturally occuring radioactive material (NORM): Exploration and Production Department. Washington, D.C: American Petroleum Institute, 1997.

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San Francisco Unified School District. and Millennium Consulting Associates, eds. Preliminary environmental assessment, naturally occuring asbestos, bungalow replacement facility, Abraham Lincoln High School: San Francisco Unified School District Project #10766, 2162 24th Avenue, San Francisco, California. San Francisco, Calif: San Francisco Unified School District, 2007.

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Naturally occurring antioxidants. Boca Raton: Lewis Publishers, 1997.

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1927-, Ikan Raphael, ed. Naturally occurring glycosides. Chichester: John Wiley, 1999.

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Lutz, Hans U., ed. Naturally Occurring Antibodies (NAbs). New York, NY: Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4614-3461-0.

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Book chapters on the topic "Naturally occuring"

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Naumann, Klaus, G. Haug, and H. Hoffmann. "Naturally Occuring Pyrethrins." In Chemistry of Plant Protection, 3–4. Berlin, Heidelberg: Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-74849-3_1.

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Bohlmann, F., and C. Zdero. "Naturally Occuring Thiophenes." In Chemistry of Heterocyclic Compounds: A Series Of Monographs, 261–324. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2008. http://dx.doi.org/10.1002/9780470187234.ch3.

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Fallon, Paul D. "Naturally occuring hiatus in modern Greek." In Themes in Greek Linguistics, 217. Amsterdam: John Benjamins Publishing Company, 1994. http://dx.doi.org/10.1075/cilt.117.31fal.

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Gribble, G. W. "Naturally Occuring Organohalogen Compounds — A Comprehensive Survery." In Fortschritte der Chemie organischer Naturstoffe / Progress in the Chemistry of Organic Natural Products, 1–423. Vienna: Springer Vienna, 1996. http://dx.doi.org/10.1007/978-3-7091-6887-5_1.

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Zomer, Anna W. M., Paul T. Van Der Saag, and Bwee Tien Poll-The. "Phytanic and Pristanic Acid Are Naturally Occuring Ligands." In Advances in Experimental Medicine and Biology, 247–54. Boston, MA: Springer US, 2003. http://dx.doi.org/10.1007/978-1-4419-9072-3_32.

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Weidner, Matylda. "Chapter 4. Responses to polar questions in Polish." In Studies in Language and Social Interaction, 109–38. Amsterdam: John Benjamins Publishing Company, 2023. http://dx.doi.org/10.1075/slsi.35.04wei.

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Using data from naturally occuring Polish conversations this chapter demonstrates how speakers of Polish answer polar questions. It offers a detailed conversation analytic examination of two response formats, particularly in their unexpanded form: (i) particle responses, which are used for confirming the terms and the action agenda of the question and which display the participants’ understanding of the status of the question as subsidiary to a larger course of action and (ii) repetitional responses, which are understood to do more than simple confirmation (e.g., to fullfil requests). By identifying the interactional circumstances for the choice of a particular format of a response, the chapter highlights the importance of social action as key to building and understanding polar question-answer sequences in Polish.
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Weiss, U., L. Merlini, and G. Nasini. "Naturally Occurring Perylenequinones." In Fortschritte der Chemie organischer Naturstoffe / Progress in the Chemistry of Organic Natural Products, 1–71. Vienna: Springer Vienna, 1987. http://dx.doi.org/10.1007/978-3-7091-8906-1_1.

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Laatsch, Hartmut, and Serge Fotso. "Naturally Occurring Anthracyclines." In Anthracycline Chemistry and Biology I, 3–74. Berlin, Heidelberg: Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/128_2008_5.

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Ravve, A. "Naturally Occurring Polymers." In Principles of Polymer Chemistry, 381–402. Boston, MA: Springer US, 1995. http://dx.doi.org/10.1007/978-1-4899-1283-1_7.

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Martin, Olwenn V., and Richard M. Evans. "Naturally Occurring Oestrogens." In Pollutants, Human Health and the Environment, 229–54. Chichester, UK: John Wiley & Sons, Ltd, 2012. http://dx.doi.org/10.1002/9781119950127.ch9.

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Conference papers on the topic "Naturally occuring"

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Flanagan, Tim, and John Goree. "Laboratory observation of naturally occuring dust density waves." In 2010 IEEE 37th International Conference on Plasma Sciences (ICOPS). IEEE, 2010. http://dx.doi.org/10.1109/plasma.2010.5534167.

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Pourcelot, Laurent, Olivier Masson, Magali Leprieur, Xavier Cagnat, Béatrice Boulet, Yves Noack, and Jean-Claude Raynal. "Biomonitoring of Airborne Micro-Particles Released by Aluminum Industry by Using Naturally Occuring Radionuclides." In Goldschmidt2020. Geochemical Society, 2020. http://dx.doi.org/10.46427/gold2020.2112.

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Winney, P. E. "Modal Surveys Of Very Large Civil Structures Using Remote Measurement Of Response To Naturally Occuring Excitation." In Stress and Vibration: Recent Developments in Measurement and Analysis, edited by Peter Stanley. SPIE, 1989. http://dx.doi.org/10.1117/12.952918.

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Miceli, Joseph J., and Denis P. Naughton. "A Model for Gradient Formation in Polycrystalline Germanium - Silicon Alloy Crystals via Czochralski Crystal Growing." In Gradient-Index Optical Imaging Systems. Washington, D.C.: Optica Publishing Group, 1987. http://dx.doi.org/10.1364/giois.1987.thd5.

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A mathematical model has been developed that describes the silicon composition gradient produced in germanium-silicon alloy crystals which have been formed via Czochralski crystal growing. This model is based on the naturally occuring segregation effect of silicon in germanium. In addition the refractive index of the alloy is described in terms of its relation to the band gap energy, which is itself dependent on the silicon concentration. A relationship between refractive index and the silicon compositon of the alloy is then derived.
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Payne, John T., Dudley L. McCaw, Kevin J. Rogers, and Robert V. Tompson. "Treatment of naturally occuring hemangiopericytoma and oral squamous cell carcinoma in dogs using surgery and photodynamic therapy with HPPH as a photosensitizer." In Photonics West '95, edited by R. Rox Anderson, Graham M. Watson, Rudolf W. Steiner, Douglas E. Johnson, Stanley M. Shapshay, Michail M. Pankratov, George S. Abela, et al. SPIE, 1995. http://dx.doi.org/10.1117/12.209060.

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Balogun, Fatai O., and Pascal Tchokossa. "POTENTIAL OCCUPATIONAL RADIATION EXPOSURE DUE TO NATURALLY OCCURING RADIOACTIVE MATERIALS (NORM) ARISING FROM EXPLOITATION OF RARE-METAL PEGMATITES OF THE IBADAN-OSHOGBO FIELDS, OLODE, IBADAN, SOUTHWESTERN NIGERIA." In GSA Annual Meeting in Seattle, Washington, USA - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017am-306474.

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Acosta, Edgar, and Rafael Perez. "The zipper self-assembly effect applied to naphthenic acid systems." In 2022 AOCS Annual Meeting & Expo. American Oil Chemists' Society (AOCS), 2022. http://dx.doi.org/10.21748/nxye5522.

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Naphthenic acids (NAs) are naturally-occuring cylic and aromatic fatty acids found in a variety of crude oils. Naphthenic acids and their neutralized form, sodium naphthenates (NaN), have been identified as the main surface-active species present in bitumenous oils, controlling most of their interfacial behavior. Different from other fatty acids, that upon neutralization undergo phase inversion and experience ultralow IFT, naphthenic acids do not produce such ultralow interfacial tension. This presentation introduces a discussion about the possible reasons that explain this unusual behavior. Some of those reasons include the possibility of extremely hydrophilic and hydrophobic components in the NA + NaN mixture, similar to the behavior of hydrophilic and lipophilic linkers used in microemulsion formulations. It has been previously shown that mixtures of hydrophilic and lipophilic linkers do not produce microemulsions (and thus ultralow interfacial tensions), but that with addition of a small amount of a surfactant of intermediate hydrophobicity, they can self-assemble to produce large bicontinuous microemulsions. This idea is explored in this work to produce low to ultralow interfacial tensions with partially neutralized naphthenic acids in the presence of a model oil. The potential implications and applications of these findings are discussed.
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Wilder, Brannon H. "Overview of Toxic Contaminants in Ground Water Origin, Transport, and Treatment." In ASME 1988 Citrus Engineering Conference. American Society of Mechanical Engineers, 1988. http://dx.doi.org/10.1115/cec1988-3404.

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Introduction: Most of you are primarily interested in ground water, by that I mean well water. I don’t believe anyone here uses a surface water source for either product water or in plant drinking water or so you think. I have had some surprises from Florida ground water acting like surface water. When hunting for reasons it was explained that water perculating through your soil acts almost like a huge lake or river with varying levels of naturally occuring contaminants and man made pollutants present depending on location and magnitude of source. I have had trouble with this since during the depression when my family lived on a grove in Lake County. Our well was driven into the limestone aquifer and my father was firmly convinced this was the best water in the entire State of Florida. In retrospect, I can never recall tasting better water, however it was hard as a rock and during the “monsoons” that occasionally came our way the well water took on a brown color just like the lake and cat-tail swamp across the road. Wells driven into the limestone aquifer, even in the artisian region below impermiable cap rock may be subject to significant surface intrusion. Paper published with permission.
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Carroll, J. F., H. D. Scott, R. A. Gunn, and M. S. O'Brien. "Naturally Occurring Radioactive Material Logging." In SPE Annual Technical Conference and Exhibition. Society of Petroleum Engineers, 1990. http://dx.doi.org/10.2118/20616-ms.

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Cohen, K. Bretonnel, William A. Baumgartner, and Lawrence Hunter. "Software testing and the naturally occurring data assumption in natural language processing." In Software Engineering, Testing, and Quality Assurance for Natural Language Processing. Morristown, NJ, USA: Association for Computational Linguistics, 2008. http://dx.doi.org/10.3115/1622110.1622116.

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Reports on the topic "Naturally occuring"

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Rack, Frank, Gilles Guerin, and David Goldberg. In-Situ Sampling and Characterization of Naturally Occuring Marine Methane Hydrate Using the D/V JOIDES Resolution. Office of Scientific and Technical Information (OSTI), December 2003. http://dx.doi.org/10.2172/896500.

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Athey, J. E. Naturally occurring asbestos in Alaska. Alaska Division of Geological & Geophysical Surveys, March 2019. http://dx.doi.org/10.14509/30162.

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Athey, J. E. Naturally occurring radon in Alaska. Alaska Division of Geological & Geophysical Surveys, March 2019. http://dx.doi.org/10.14509/30163.

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Daanen, R. D. Naturally occurring holes in ice. Alaska Division of Geological & Geophysical Surveys, February 2020. http://dx.doi.org/10.14509/30420.

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Goodfellow, P. J., A. D. Woodward, and J. E. Athey. Naturally occurring radon in Alaska. Alaska Division of Geological & Geophysical Surveys, April 2024. http://dx.doi.org/10.14509/31109.

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Athey, J. E., R. D. Daanen, and K. A. Hendricks. Naturally occurring arsenic in Alaska groundwater. Alaska Division of Geological & Geophysical Surveys, 2018. http://dx.doi.org/10.14509/30060.

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Athey, J. E., and R. P. Daanen. Naturally occurring arsenic in interior Alaska groundwater. Alaska Division of Geological & Geophysical Surveys, September 2018. http://dx.doi.org/10.14509/30094.

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Mcnaughton, Michael, David Patrick Fuehne, Jeffrey Jay Whicker, Nita Patel, Jessica Mcdonnel Gillis, and Aysha Reede McClory. Naturally Occurring Radionuclides for EIM and Intellus. Office of Scientific and Technical Information (OSTI), March 2015. http://dx.doi.org/10.2172/1172221.

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Sleep, Matthew, and Damian Matzen. ADA Accessible Trail Improvement with Naturally Occurring, Sustainable Materials. Transportation Research and Education Center (TREC), 2020. http://dx.doi.org/10.15760/trec.249.

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Landry, Craig, Andreas Lange, John List, Michael Price, and Nicholas Rupp. Is There a 'Hidden Cost of Control' in Naturally-Occurring Markets? Evidence from a Natural Field Experiment. Cambridge, MA: National Bureau of Economic Research, September 2011. http://dx.doi.org/10.3386/w17472.

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