Дисертації з теми "Naturally occurring radioactive materials"
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Nelson, Andrew Wyatt. "Naturally occurring radioactive materials associated with unconventional drilling for natural gas." Diss., University of Iowa, 2016. https://ir.uiowa.edu/etd/5579.
Повний текст джерелаAlharbi, Sami Hamad. "Measurements and monitoring of naturally occurring radioactive materials for regulation." Thesis, Queensland University of Technology, 2016. https://eprints.qut.edu.au/98122/1/Sami_Alharbi_Thesis.pdf.
Повний текст джерелаLarijani, C. "Production and evaluation of 236gNp and reference materials for naturally occurring radioactive materials." Thesis, University of Surrey, 2017. http://epubs.surrey.ac.uk/814166/.
Повний текст джерелаEitrheim, Eric Steven. "Characterization of wastes pertaining to naturally occurring radioactive materials (NORM) and the nuclear fuel cycle." Diss., University of Iowa, 2017. https://ir.uiowa.edu/etd/5464.
Повний текст джерелаLiberati, Blake P. "Removal of Naturally Occurring Radioactive Material From Flowback/Produced Water From the Hydraulic Fracturing Process." Ohio University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1438968751.
Повний текст джерелаFrignani, Ilaria. "Tecniche di riduzione della quantità di rifiuti prodotti dall’attività di estrazione petrolifera e contenenti NORM (Naturally Occurring Radioactive Materials)." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017.
Знайти повний текст джерелаShams, Hasan M. "Determination of levels of naturally occurring radioactive materials in lagoon samples containing water from oil fields in the State of Kuwait." Thesis, University of Surrey, 2018. http://epubs.surrey.ac.uk/848601/.
Повний текст джерелаAlazemi, Naser. "Determination of levels of naturally occurring radioactive materials in environmental samples in the State of Kuwait by high-resolution γ-ray spectrometry". Thesis, University of Surrey, 2015. http://epubs.surrey.ac.uk/807973/.
Повний текст джерелаTorres, Luisa Fernanda. "Holistic Risk Assessment of Surface Water Contamination by Naturally Occurring Radioactive Material in Oil Produced Water from the Bakken Shale." Thesis, North Dakota State University, 2016. https://hdl.handle.net/10365/28216.
Повний текст джерелаCivil and Environmental Engineering Department; North Dakota Water Resources Research Institute Fellowship program; Industrial and Manufacturing Engineering Department; College of Engineering
Daggag, Dalia. "Computational Study on Binding of Naturally Occurring Aromatic and Cyclic Amino Acids with Graphene." DigitalCommons@Robert W. Woodruff Library, Atlanta University Center, 2019. http://digitalcommons.auctr.edu/cauetds/203.
Повний текст джерелаSantawamaitre, Todsadol. "An evaluation of the level of naturally occuring radioactive materials in soil samples along the Chao Phraya river basin." Thesis, University of Surrey, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.555934.
Повний текст джерелаPeña, Gomez Natalie. "Development of polymeric and silica filtering materials functionalized with antimicrobial compounds for the elimination of microorganisms in liquid food." Doctoral thesis, Universitat Politècnica de València, 2020. http://hdl.handle.net/10251/137041.
Повний текст джерела[CAT] En la present tesi doctoral s'ha avaluat l'ús de nous suports cel·lulòsics i silicis com a sistemes de filtració per a l'estabilització i conservació d'aliments líquids, amb la finalitat d'afrontar dos grans reptes de la indústria de begudes. D'una banda, evitar o minimitzar els canvis en les propietats nutricionals, estructurals i organolèptiques dels aliments, ocasionats per la pasteurització tèrmica tradicional, i oferir una alternativa al problema de la baixa viabilitat deguda als alts costos d'inversió/producció en aplicar noves tecnologies no tèrmiques. Per això, aquesta tesi doctoral es centra en el desenvolupament i avaluació d'una nova tecnologia no tèrmica de conservació d'aliments líquids basada en la filtració. S'han desenvolupat sistemes de filtració a partir de suports cel·lulòsics i silicis, sense funcionalitzar o funcionalitzats amb compostos antimicrobians. En el primer capítol es va avaluar l'ús de materials de cel·lulosa com a suports filtrants per al tractament d'aliments líquids. Com a primera aproximació es va desenvolupar un material porós nano-micro tubular a partir de l'extracció i deslignificació del material cel·lulòsic present en el cor o raquis de la panolla de dacsa. L'ús d'aquest suport va resultar ser efectiu com a material filtrant per al tractament d'aigua i suc de taronja, en un sistema de flux continu, eliminant la càrrega microbiana. L'aplicació d'aquest suport com a sistema de filtració presenta diversos avantatges com la seua capacitat de retenció microbiana, la reutilització de subproductes de la dacsa i, per tant, el seu respecte al medi ambient. No obstant això, seria necessari optimitzar el procés de filtrat per a evitar la freqüent obturació dels seus porus que va requerir diversos cicles de rentada durant el procés, així com establir un mètode de regeneració del material per a incrementar la seua vida útil. A més, aquest sistema va afectar el color del suc filtrat, que no es va mantenir constant durant el procés, la qual cosa suposa un important desavantatge que és necessari abordar. Com a segona aproximació, es va avaluar el potencial de la immobilització d'una molècula bioactiva sobre membranes de cel·lulosa, per a millorar la capacitat de retenció microbiana del material cel·lulòsic, així com permetre la seua reutilització. Els filtres de cel·lulosa funcionalitzats amb poliamines van demostrar ser eficaces en l'eliminació de patògens en aigua, a causa de les càrregues positives generades pels grups amina immobilitzats en la superfície de les membranes, que atrauen i retenen els bacteris carregats negativament. Donada la fàcil preparació i procediment d'ús de les membranes de cel·lulosa funcionalitzades amb poliamines, aquestes podrien ser considerades una bona opció per al desenvolupament de sistemes de tractament d'aigües in situ, ràpids, de fàcil maneig i de baix cost. El segon capítol descriu el desenvolupament i aplicació de partícules de sílice funcionalitzades amb compostos d'olis essencials, amb la finalitat de dissenyar coadjuvants de filtració amb activitat antimicrobiana. La filtració de diverses matrius alimentàries (aigua, cervesa i suc de poma) a través dels suports funcionalitzats amb els antimicrobians naturals va demostrar ser eficaç en la reducció del recompte del cep patogen Escherichia coli, així com enfront de la microflora endògena de la cervesa i el suc (bacteris àcid làctics, aerobis mesòfils, psicròfils, floridures i llevats). L'eficàcia en el control microbià es deu a la combinació de l'adsorció física i la inactivació per contacte amb els compostos d'olis essencials immobilitzats. A més, l'avaluació de les propietats fisicoquímiques i sensorials dels aliments líquids estudiats va demostrar un efecte poc significatiu, aquest depèn de la grandària de les partícules de sílice usades i de la molècula bioactiva immobilitzada. Per tant, el sistema de conserv
[EN] In the present doctoral thesis the use of new cellulosic and silica supports as filtering systems for the stabilization and preservation of liquid foods has been evaluated to overcome two major challenges of the beverage industry. On the one hand, avoid or minimize the changes in the nutritional, structural and organoleptic properties of food caused by traditional thermal pasteurization, and offer an alternative to the problem of low viability due to high investment/production costs when applying new non-thermal technologies. Therefore, this doctoral thesis focuses on the development and evaluation of a new non-thermal technology for the preservation of liquid foods based on filtration. The filtering systems have been developed from cellulosic and silica supports, non-modified or functionalized with antimicrobial compounds. In the first chapter, the use of cellulose materials as filtering supports for the treatment of liquid foods was evaluated. As first approximation, a porous nano-micro tubular material was developed from the extraction and delignification of the cellulosic material present in the corn stalk. The use of this support was effective as filtering material for the treatment of water and orange juice, in a continuous flow system, eliminating the microbial load. The application of this support as filtering system has several advantages, such as its microbial retention capacity, the reuse of corn by-products and, therefore, its respect for the environment. However, it would be necessary to optimize the filtering process to avoid the frequent clogging of its pores that required several washing cycles during the process, as well as to establish a method of material regeneration to increase its life. In addition, this system affected the color of the filtered juice, which did not remain constant during the process, representing an important disadvantage that must be addressed. As a second approach, the potential of the immobilization of a bioactive molecule on cellulose membranes was evaluated to improve the microbial retention capacity of the cellulosic material, as well as to allow its reuse. The cellulose filters functionalized with polyamines proved to be effective in eliminating pathogens in water, due to the positive charges generated by the amine groups immobilized on the surface of the membranes, which attract and retain the negatively charged bacteria. Given the easy preparation and usage of the polyamines-functionalized cellulose membranes, these could be considered a good option for the development of fast, easy to use and low cost in situ water treatment systems. The second chapter describes the development and application of silica particles functionalized with essential oil components to design filtering aids with antimicrobial activity. The filtration of various food matrices (water, beer and apple juice) through the supports functionalized with natural antimicrobials proved to be effective in reducing the load of the pathogenic strain Escherichia coli, as well as reducing the endogenous microflora of beer and the juice (lactic acid bacteria, mesophilic, psychrophilic, mold and yeast). The removal capability is due to the combination of physical adsorption and contact inactivation with the essential oil compounds immobilized. In addition, the evaluation of the physicochemical and sensory properties of the liquid foods studied showed a not significant effect, it depends on the size of the silica particles used and the immobilized bioactive molecule. Therefore, the proposed preservation system has a high potential for cold beverage pasteurization processes.
N. Peña-Gomez would like to thank for financial support in the frame of her PhD project to Operational Programme of the European Social Fund (ESF) 2014-2020, the Agencia Estatal de Investigación, Generalitat Valenciana and FEDER-EU (Projects RTI2018-101599-B-C21 and AGL2015-70235-C2-1-R). The authors also thank the Electronic Microscopy & Microanalysis Laboratory at Patras University for support.
Peña Gomez, N. (2020). Development of polymeric and silica filtering materials functionalized with antimicrobial compounds for the elimination of microorganisms in liquid food [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/137041
TESIS
Motimedi, T. C. "Evaluation of soil to plant transfer factors of naturally occurring radioactive materials (norms) in some vegetables / T.C Motimedi." Thesis, 2012. http://hdl.handle.net/10394/15769.
Повний текст джерелаBahmaid, Mohammad A. "Application of the gamma pathway exemption rule for naturally occurring radioactive materials in industrial waste using ISOSHLD-II." Thesis, 1995. http://hdl.handle.net/1957/34658.
Повний текст джерелаShiau, Tz-Jau, and 蕭子昭. "Feasibility Study Of Polyhydroxyalkanoates Production For Materials Recycling Using Naturally-occurring Pollutant Degraders." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/63362230681898030492.
Повний текст джерела國立宜蘭大學
化學工程與材料工程學系碩士班
100
Considering eco-friendliness of recycling and reuses of biomaterials for sustainable development, this first-attempt study used indigenous pollutant degrading bacteria for the production of biodegradable polymers polyhydroxyalkanoates (PHAs) during wastewater treatment. First, the candidate strains of poly-3-hydroxybutyrate (PHB) production were inspected among isolated pollutant-degrading microbes via Sudan black B staining (SB staining). Next, according to batch cultures using lauric acid (C12) as the sole carbon source for PHB production, the promising PHB-generating strains were obtained via comparative analysis upon the characteristics of cell growth and/or PHB production. Our findings indicated that Aeromonas hydrophila NIU01 cultured at 10 g L-1 lauric acid-supplemented medium could generate intracellular PHB content at ca. 36.02 wt%. At optimal concentration of lauric acid, cultures containing dyes or amines at different concentrations were conducted to simulate of microbial production PHB in parallel with dye decolorization. Here, our finding indicated that strains NIU01 could significantly tolerate dye pollutant(s) and aromatic amines for cell growth and PHB-production, suggesting promising feasibility to be used for simultaneous PHB production and wastewater decolorization. In addition, dye-decolorized wastewaters (WWs) were used as carbon source for batch cultivation. With CO2 respirometer analysis, inhibitory effects of WW on microbial growth and PHAs-generating capabilities were disclosed to reveal the feasibility of materials recycling and reuses during WW treatment. Follow-up studies also inspected the economic-viability of using various industrial WWs for PHAs production for practical industrial applications. This study also isolated functioning microorganisms from guts of indigenous earthworm Eisenia fetida for production of green biopolymer materials and explored the feasibility of simultaneous dye-bearing wastewater treatment and production of biodegradable polymer PHAs. After serial acclimation to evolve most stable microbial decolorizes, lauric acid-bearing batch cultures of these consortia were conducted in nutrient-limiting conditions to evaluate efficiencies of PHB production. These strains were found to be EPMG01, EPMG02, EPMG03, ESB01 and ESB03, indicating the promising feasibility of simultaneous generation of biopolymer PHAs and industrial dye-wastewater treatment.
Leopold, Karsten [Verfasser]. "Chemical types of bounding of natural radionuclides in TENORM : (technologically enhanced naturally occuring radioactive materials) / presented by Karsten Leopold." 2007. http://d-nb.info/988995603/34.
Повний текст джерела