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Letteratura scientifica selezionata sul tema "Culture heterotrophe"

Autore: Grafiati

Pubblicato: 28 settembre 2024

Ultima modifica: 31 luglio 2025

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Articoli di riviste sul tema "Culture heterotrophe"

Wang, Jing Han, Hai Zhen Yang, and Feng Wang. "Potential of Mixotrophic Cultivation of Chlorella sorokiniana for Biodiesel Production." Advanced Materials Research 779-780 (September 2013): 1509–13. http://dx.doi.org/10.4028/www.scientific.net/amr.779-780.1509.

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Biodiesel from microalgae provides a promising alternative for biofuel production. Microalgal biodiesel can be produced under three major cultivation modes, namely, photoautotrophic, heterotrophic, and mixotrophic cultivation. Studies of biodiesel production from microalgae have been reported mostly focusing on photoautotrophic cultivation, mixotrophic cultivation has rarely been researched. This paper compared the biomass productivity, lipid content, and lipid productivity ofChlorella sorokinianaunder photoautotrophic, heterotrophic, and mixotrophic cultivation. Glucose was adopted as organic

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Wang, Jing Han, Hai Zhen Yang, and Feng Wang. "Mixotrophic Cultivation of Scenedesmus sp. as Biodiesel Feedstock." Advanced Materials Research 777 (September 2013): 268–73. http://dx.doi.org/10.4028/www.scientific.net/amr.777.268.

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Microalgae are a promising feedstock for biodiesel production. Microalgal biodiesel can be obtained under three major cultivation modes, namely, photoautotrophic, heterotrophic, and mixotrophic cultivation. Reported studies of microalgal biodiesel production are mainly based on photoautotrophic cultivation, mixotrophic cultivation has rarely been researched. This paper compared the biomass productivity, lipid content, and lipid productivity of Scenedesmus sp. under photoautotrophic, heterotrophic, and mixotrophic cultivation. Glucose was added as organic carbon source at five concentrations (0

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Correia, Nádia, Hugo Pereira, Peter S. C. Schulze, et al. "Heterotrophic and Photoautotrophic Media Optimization Using Response Surface Methodology for the Novel Microalga Chlorococcum amblystomatis." Applied Sciences 13, no. 4 (2023): 2089. http://dx.doi.org/10.3390/app13042089.

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The nutritional requirements of novel microalgal strains are key for their effective cultivation and metabolite content. Therefore, the optimization of heterotrophic and photoautotrophic culture media is crucial for novel Chlorococcum amblystomatis growth. Heterotrophic and photoautotrophic biomass samples were characterized to identify the differences between their heterotrophic and photoautotrophic biomass composition and their biotechnological potential. Media optimization through surface response methodology led to 44.9 and 51.2% increments in C. amblystomatis-specific growth rates under h

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Park, Jeong-Eun, Shan Zhang, Thi Hiep Han, and Sun-Jin Hwang. "The Contribution Ratio of Autotrophic and Heterotrophic Metabolism during a Mixotrophic Culture of Chlorella sorokiniana." International Journal of Environmental Research and Public Health 18, no. 3 (2021): 1353. http://dx.doi.org/10.3390/ijerph18031353.

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The contribution ratio of autotrophic and heterotrophic metabolism in the mixotrophic culture of Chlorella sorokiniana (C. sorokiniana) was investigated. At the early stage of mixotrophic growth (day 0–1), autotrophy contributed over 70% of the total metabolism; however, heterotrophy contributed more than autotrophy after day 1 due to the rapid increase in cell density, which had a shading effect in the photo-bioreactor. Heterotrophy continued to have a higher contribution until the available organic carbon was depleted at which point autotrophy became dominant again. Overall, the increase in

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Cupo, Adelaide, Simone Landi, Salvatore Morra, et al. "Autotrophic vs. Heterotrophic Cultivation of the Marine Diatom Cyclotella cryptica for EPA Production." Marine Drugs 19, no. 7 (2021): 355. http://dx.doi.org/10.3390/md19070355.

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Recently, the marketable value of ω-3 fatty acid, particularly eicosapentaenoic acid (EPA), increased considering their health effects for human consumption. Microalgae are considered a valuable and “green” source of EPA alternative to fish oils, but considerable efforts are necessary for their exploitation at an industrial level. Due to the high operation costs of photoautotrophic microalgae cultivation, heterotrophic growth represents a promising economic solution. Marine diatoms are the major ecological producers of ω-3 fatty acids. Few species of diatoms are capable to grow in the dark usi

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Wang, Kaixuan, Zhongjie Wang, Yi Ding, et al. "Optimization of Heterotrophic Culture Conditions for the Algae Graesiella emersonii WBG-1 to Produce Proteins." Plants 12, no. 12 (2023): 2255. http://dx.doi.org/10.3390/plants12122255.

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The aim of this study was to improve the protein content and yield of heterotrophic microalgal cultivation and establish a simple, economical, and efficient method for microalgal protein production using the novel green alga, Graesiella emersonii WBG-1, which has not been previously reported for heterotrophic cultivation. Through batch heterotrophic cultivation of this alga, we observed that glucose was the optimal carbon source, while it could not use sucrose as a carbon source. Biomass production and protein content were significantly reduced when sodium acetate was used as the carbon source

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Morris, J. Jeffrey, Robin Kirkegaard, Martin J. Szul, Zackary I. Johnson, and Erik R. Zinser. "Facilitation of Robust Growth of Prochlorococcus Colonies and Dilute Liquid Cultures by “Helper” Heterotrophic Bacteria." Applied and Environmental Microbiology 74, no. 14 (2008): 4530–34. http://dx.doi.org/10.1128/aem.02479-07.

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ABSTRACT Axenic (pure) cultures of marine unicellular cyanobacteria of the Prochlorococcus genus grow efficiently only if the inoculation concentration is large; colonies form on semisolid medium at low efficiencies. In this work, we describe a novel method for growing Prochlorococcus colonies on semisolid agar that improves the level of recovery to approximately 100%. Prochlorococcus grows robustly at low cell concentrations, in liquid or on solid medium, when cocultured with marine heterotrophic bacteria. Once the Prochlorococcus cell concentration surpasses a critical threshold, the “helper

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Singh, V., and A. K. Mittal. "Characterization of biofilm of a rotating biological contactor treating synthetic wastewater." Water Science and Technology 66, no. 2 (2012): 429–37. http://dx.doi.org/10.2166/wst.2012.221.

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A four-stage rotating biological contactor (RBC) was designed and operated to treat synthetic wastewater containing 1,000 mg/l chemical oxygen demand (COD) and 112 mg/l NH4+-N. A mixed culture bacterial biofilm was developed consisting of a heterotrophic bacterium Paracoccus pantotrophus, nitrifiers and other heterotrophs. Applying the peculiar characteristics of P. pantotrophus of simultaneous heterotrophic nitrification and aerobic denitrification, high simultaneous removal of carbon and nitrogen could be achieved in the fully aerobic RBC. The microbial community structure of the RBC biofilm

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Hršak, Dubravka, and Ana Begonja. "Possible Interactions within a Methanotrophic-Heterotrophic Groundwater Community Able To Transform Linear Alkylbenzenesulfonates." Applied and Environmental Microbiology 66, no. 10 (2000): 4433–39. http://dx.doi.org/10.1128/aem.66.10.4433-4439.2000.

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ABSTRACT The relationships and interactions within a methanotrophic-heterotrophic groundwater community were studied in a closed system (shake culture) in the presence of methane as the primary carbon and energy source and with the addition of the pure linear alkylbenzenesulfonate (LAS) congener 2-[4-(sulfophenyl)]decan as a cometabolic substrate. When cultured under different conditions, this community was shown to be a stable association, consisting of one obligate type II methanotroph and four or five heterotrophs possessing different nutritional and physiological characteristics. The resul

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Tsuneda, S., S. Park, H. Hayashi, J. Jung, and A. Hirata. "Enhancement of nitrifying biofilm formation using selected EPS produced by heterotrophic bacteria." Water Science and Technology 43, no. 6 (2001): 197–204. http://dx.doi.org/10.2166/wst.2001.0374.

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The possibility of enhancing nitrifying biofilm formation rate with the aid of selected EPS produced by heterotrophic bacteria was investigated. When EPS production characteristics were examined for four kinds of heterotrophs isolated from a domestic wastewater treatment reactor, two strains obtained from biofilms (B1, B2) exhibited a higher polysaccharide production rate than those from suspended flocs (A1, A2). Among EPS components, the concentration of uronic acids gave a good correlation with flocculation ability, which suggests that acidic polysaccharides play a major role in bioaggregate

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Più fonti

Tesi sul tema "Culture heterotrophe"

Camarena, Cristobal. "Lutein production and extraction improvements from a heterotrophic culture of scenedesmus almeriensis." Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPAST085.

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Les microalgues sont considérées comme une solution biotechnologique aux problèmesmajeurs de ce siècle, offrant des réponses et des alternatives dans des domainestels que la malnutrition, les pénuries alimentaires, le changement climatique etla pollution. En tant qu'organismes photosynthétiques, les microalgues synthétisent denombreux composés afin d'exploiter la lumière du soleil pour leurs fonctions métaboliques, notamment la lutéine, un caroténoïde jaune essentiel pour l'alimentation humaine.Bien que la lutéine soit un composé associé à l'activité photosynthétique des microalgues,certaines

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Ip, Po-fung. "Elicitation of astaxanthin biosynthesis in dark-heterotrophic cultures of Chlorella zofingiensis." Click to view the E-thesis via HKUTO, 2005. http://sunzi.lib.hku.hk/hkuto/record/B34617048.

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Sanz, Sáez Isabel. "Contribution of marine heterotrophic cultured bacteria to microbial diversity and mercury detoxification." Doctoral thesis, Universitat Autònoma de Barcelona, 2021. http://hdl.handle.net/10803/671617.

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Els oceans conten aproximadament un total de 10^29 cèl·lules microbianes. Els bacteris marins són responsables de la major part de la respiració que es produeix en l’oceà i són essencials en els cicles biogeoquímics de la Terra. Estudiar la diversitat bacteriana dels ecosistemes marins i tenir accés als genomes mitjançant estudis dependents o independents de cultiu és important per desxifrar el potencial metabòlic dels bacteris marins. El cultius ens aporten informació sobre la fisiologia bacteriana, ecologia i contingut genòmic, però la majoria dels esforços en aïllar bacteris marins proven

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Strate, Jessica Lorene. "Characterization and activity comparisons of methanotrophic-heterotrophic mixed cultures derived from a landfill environment." [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0009061.

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溫志友 and Zhiyou Wen. "A high yield and productivity strategy for eicosapentaenoic acid production by the diatom Nitzschia laevis in heterotrophic culture." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2001. http://hub.hku.hk/bib/B31242418.

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Wen, Zhiyou. "A high yield and productivity strategy for eicosapentaenoic acid production by the diatom Nitzschia laevis in heterotrophic culture." Hong Kong : University of Hong Kong, 2001. http://sunzi.lib.hku.hk/hkuto/record.jsp?B23242097.

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Ducos, Jean-Paul. "Croissance et metabolisme primaire de suspensions heterotrophes de catharanthus roseus en fermenteur : importance de la phase gazeuse." Toulouse, INSA, 1986. http://www.theses.fr/1986ISAT0031.

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Berthold, Erwin David. "Enhancing Algal Biomass and Lipid Production through Bacterial and Fungal Co-Culture." FIU Digital Commons, 2016. http://digitalcommons.fiu.edu/etd/2563.

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This thesis investigates the effects of co-culturing microorganisms including 37 yeast, 38 bacteria, nine diazotrophic cyanobacteria, and three fungi on biomass and lipid production in fresh- and saltwater algae. Algal lipid content was measured using Nile Red method and gravimetric techniques. Among the algal strains tested, freshwater Coelastrum sp. 46-4, and saltwater Cricosphaera sp. 146-2-9, showed enhanced biomass yield and lipid content in response to co-culture with bacteria, cyanobacteria, and fungi. While co-culture with yeast caused inhibition of algal productivity, no difference in

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Fuller, Andrew Kenneth Radburne. "The grazing and growth rates of some marine protozoa measured in batch and continuous culture with particular reference to the heterotrophic dinoflagellate Oxyrrhis marina." Thesis, Royal Holloway, University of London, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.325771.

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Zhang, Jing. "Development of Chlorella vulgaris and Saccharomyces cerevisiae in immobilized cultures." Thesis, université Paris-Saclay, 2020. http://www.theses.fr/2020UPASC034.

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Chlorella vulgaris (C. vulgaris) est un organisme modèle qui présente un potentiel commercial élevé dans le domaine de l'alimentation et de l'énergie, avec une faisabilité prouvée de cultures sous forme de biofilms et de co-culture de levures/microalgues pour la valorisation in situ du CO2 dans les processus biotechnologiques. Ce travail de doctorat se concentre sur les colonies immobilisées dans des cultures pures ou mixtes. Il vise une meilleure compréhension des interactions au sein des colonies et entre colonies, avec pour objectif ultime de comprendre et d'optimiser les co-cultures.Pour a

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Più fonti

Libri sul tema "Culture heterotrophe"

Kirchman, David L. Microbial growth, biomass production, and controls. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198789406.003.0008.

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Soon after the discovery that bacteria are abundant in natural environments, the question arose as to whether or not they were active. Although the plate count method suggested that they were dormant if not dead, other methods indicated that a large fraction of bacteria and fungi are active, as discussed in this chapter. It goes on to discuss fundamental equations for exponential growth and logistic growth, and it describes phases of growth in batch cultures, continuous cultures, and chemostats. In contrast with measuring growth in laboratory cultures, it is difficult to measure in natural env

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Capitoli di libri sul tema "Culture heterotrophe"

Cortese, Enrico, Luca Carraretto, Barbara Baldan, and Lorella Navazio. "Arabidopsis Photosynthetic and Heterotrophic Cell Suspension Cultures." In Methods in Molecular Biology. Springer US, 2020. http://dx.doi.org/10.1007/978-1-0716-0880-7_8.

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Kovar, Karin, Pavel Přibyl, and Markus Wyss. "Microalgae Grown under Heterotrophic and Mixotrophic Conditions." In Industrial Scale Suspension Culture of Living Cells. Wiley-VCH Verlag GmbH & Co. KGaA, 2014. http://dx.doi.org/10.1002/9783527683321.ch04.

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Imseng, Nicole, Stefan Schillberg, Cornelia Schürch, et al. "Suspension Culture of Plant Cells Under Heterotrophic Conditions." In Industrial Scale Suspension Culture of Living Cells. Wiley-VCH Verlag GmbH & Co. KGaA, 2014. http://dx.doi.org/10.1002/9783527683321.ch07.

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Ogbonna, James Chukwuma, and Mark P. McHenry. "Culture Systems Incorporating Heterotrophic Metabolism for Biodiesel Oil Production by Microalgae." In Biofuel and Biorefinery Technologies. Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-16640-7_4.

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Singh, Amit K., and Daniel C. Ducat. "Generation of Stable, Light-Driven Co-cultures of Cyanobacteria with Heterotrophic Microbes." In Plant Synthetic Biology. Springer US, 2022. http://dx.doi.org/10.1007/978-1-0716-1791-5_16.

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Mannan, R. Mannar, and Himadri B. Pakrasi. "The Photosynthetic Apparatus in Autotrophic and Heterotrophic Cultures of Anabaena Variabilis ATCC 29413." In Research in Photosynthesis. Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-009-0383-8_95.

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Gu, Ji-Dong, and Yoko Katayama. "Microbiota and Biochemical Processes Involved in Biodeterioration of Cultural Heritage and Protection." In Microorganisms in the Deterioration and Preservation of Cultural Heritage. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-69411-1_2.

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AbstractThe world cultural heritage sites face new challenges for an effective protection and management because of destruction and damage initiated by both natural and anthropogenic causes. Fresh rock and sandstone surfaces of buildings are quickly colonized and covered by a layer of microorganisms, including phototrophs, lithotrophs, and heterotrophs to form a biofilm that alters the local conditions of the stone surfaces, especially under the favorable tropical climate conditions for autotrophic microorganisms and plants. Biofilms had been studied with indigenous or pure cultures of isolate

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Wen, Z. Y., and F. Chen. "Optimization of Nitrogen Sources for the Production of Eicosapentaenoic Acid by the Diatom Nitzschia Laevis in Heterotrophic Cultures." In Algae and their Biotechnological Potential. Springer Netherlands, 2001. http://dx.doi.org/10.1007/978-94-015-9835-4_3.

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Benlloch, Susana, Francisco Rodríguez-Valera, Silvia G. Acinas, and Antonio J. Martínez-Murcia. "Heterotrophic bacteria, activity and bacterial diversity in two coastal lagoons as detected by culture and 16S rRNA genes PCR amplification and partial sequencing." In Coastal Lagoon Eutrophication and ANaerobic Processes (C.L.E.AN.). Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-1744-6_1.

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Häuser, Christiane, Johannes Jung, and Klaus Grossmann. "Changes in abscisic acid levels of heterotrophic cell suspension cultures caused by the plant growth retardant BAS 111… W and possible physiological consequences." In Progress in Plant Growth Regulation. Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-2458-4_18.

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Atti di convegni sul tema "Culture heterotrophe"

Grigoryan, Alexander. "Challenges in Microbial Monitoring of an Oil-water Separation Facility." In MECC 2023. AMPP, 2023. https://doi.org/10.5006/mecc2023-20123.

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Abstract Abundance and diversity of microorganisms, including H2S-producing and corrosive bacteria, in the produced water collected from different locations at a Central Arabian Gas-Oil Separation Plant (GOSP) were examined by culture-based and culture-independent methods. Conventional MPN techniques showed that abundance of general heterotrophic bacteria exceeded acceptable levels more frequently in water samples from High Pressure-Production Trap (HPPT) and Water-Oil Separator (WOSEP) than in water from Production Header (PH). MPN assay of corrosive sulfidogenic sulfate-reducing bacteria (SR

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Franklin, Michael J., David C. White, and Hugh S. Isaacs. "The Use of Current Density Mapping in the Study of Microbial Influenced Corrosion." In CORROSION 1990. NACE International, 1990. https://doi.org/10.5006/c1990-90104.

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Abstract The scanning vibrating electrode technique (SVET) was used to map current densities over carbon steel coupons exposed to bacteria. This study was initiated to evaluate the usefulness of the SVET in studies of microbial influenced corrosion (MIC). A comparison was made between current densities, at open circuit potential, of steel exposed to dilute sterile microbiological medium, and steel exposed to medium containing a culture of aerobic heterotrophic bacteria. At specific times during the analysis, small amplitude cyclic polarizations were performed. The SVET was utilized to detect l

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Kholodenko, V. P., V. A. Chugunov, I. A. Irkhina, et al. "Investigation of Influence of Biofilms on Microbiologically Induced Corrosion in Oil- and Gas-Processing Industries." In CORROSION 2005. NACE International, 2005. https://doi.org/10.5006/c2005-05496.

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Abstract Oil-and gas- pipelines and processing equipment are usually attacked by different microorganisms that can result with time in damage of the equipment leading to serious technological incidences and environmental contamination. The direction and speed of the processes responsible for bio-damages and bio-corrosion are determined by vital activity of microorganisms. Namely bio-films presenting complex associations of the microorganisms and their metabolites are among the main reasons providing such incidences. From other side, bio-films can be protective agents against corrosion as well.

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Fichter, Jennifer, Geddy Hamblen, Chris Janes, Elizabeth J. Summer, Elizabeth J. Summer, and Abigail Mills. "Use of a Methodological Panel to Identify the Source of Problematic Microbial Contamination in an Oil Shale Field." In CORROSION 2017. NACE International, 2017. https://doi.org/10.5006/c2017-09019.

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Abstract An oil shale field was found to exhibit classic signs of a heavy microbial burden, including incidences of hydrogen sulfide production, downhole and surface microbially influenced corrosion, downhole pump and surface equipment fouling and fracturing fluid and drilling mud degradation. Over 140 samples, including formation core material, drilling muds, fracturing fluid source waters, production well samples, samples collected from failed pipe surfaces and samples from salt water disposal facilities, were collected in a comprehensive survey. Microbial activity was measured in parallel u

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MARONEZE, M. M., G. J. G. TEIXEIRA, C. NEVES, L. Q. ZEPKA, M. I. QUEIROZ, and E. JACOB-LOPES. "EVALUATION OF SUBSTRATE LIMITATION KINETICS IN HETEROTROPHIC MICROALGAL CULTURES." In XI Congresso Brasileiro de Engenharia Química em Iniciação Científica. Editora Edgard Blücher, 2015. http://dx.doi.org/10.5151/chemeng-cobeqic2015-314-33907-260288.

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Stramski, Dariusz, Marian Sedlak, David Tsai, Eric J. Amis, and Dale A. Kiefer. "Dynamic light scattering by cultures of heterotrophic marine bacteria." In San Diego '92, edited by Gary D. Gilbert. SPIE, 1992. http://dx.doi.org/10.1117/12.140688.

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Maroneze, Mariana Manzoni, Cristina Neves, Leila Queiroz Zepka, Maria Isabel Queiroz, and Eduardo Jacob Lopes. "EVALUATION OF SUBSTRATE LIMITATION KINETICS IN HETEROTROPHIC MICROALGAL CULTURES." In Simpósio Nacional de Bioprocessos e Simpósio de Hidrólise Enzimática de Biomassa. Galoá, 2015. http://dx.doi.org/10.17648/sinaferm-2015-33510.

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Savanina, Y. V. "INTENSIFICATION OF BIOLOGICAL SELF-CLEANING UNDER CONDITIONS OF SLOPE DISCHARGE." In NOVEL TECHNOLOGIES IN MEDICINE, BIOLOGY, PHARMACOLOGY AND ECOLOGY. LLC Institute Information Technologies, 2024. http://dx.doi.org/10.47501/978-5-6044060-4-5.225-229.

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The article studies the possibilities of creating biohybrid materials based on a mixed-separate culture of cyanobacteria and heterotrophic bacteria isolated from polluted environments, and their use in conditions of excess pollution.

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Elvert, Marcus, Qingzeng Zhu, Jonathan Gropp, et al. "Clues on methane’s biogeochemistry and associated heterotrophic microbes in marine sediments from AOM enrichment cultures." In Goldschmidt2023. European Association of Geochemistry, 2023. http://dx.doi.org/10.7185/gold2023.16918.

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Wei, X., W. Yang, and S. Choi. "A HIGH POWER-DENSITY, SELF-SUSTAINED HYBRID BIO-SOLAR CELL WITH CO-CULTURE OF HETEROTROPHIC AND PHOTOSYNTHETIC BACTERIA." In 2016 Solid-State, Actuators, and Microsystems Workshop. Transducer Research Foundation, 2016. http://dx.doi.org/10.31438/trf.hh2016.106.

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Rapporti di organizzazioni sul tema "Culture heterotrophe"

Phelps, T. J., D. Ringelberg, A. T. Mikell, D. C. White, and C. B. Fliermans. Mineralization of trichloroethylene by heterotrophic enrichment cultures. Office of Scientific and Technical Information (OSTI), 1988. http://dx.doi.org/10.2172/666263.

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Shpigel, Muki, Allen Place, William Koven, Oded (Odi) Zmora, Sheenan Harpaz, and Mordechai Harel. Development of Sodium Alginate Encapsulation of Diatom Concentrates as a Nutrient Delivery System to Enhance Growth and Survival of Post-Larvae Abalone. United States Department of Agriculture, 2001. http://dx.doi.org/10.32747/2001.7586480.bard.

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The major bottlenecks in rearing the highly priced gastropod abalone (Haliotis spp.) are the slow growth rate and the high mortality during the first 8 to 12 weeks following metamorphosis and settling. The most likely reason flor these problems is related to nutritional deficiencies in the diatom diet on which the post larvae (PL) feed almost exclusively in captivity. Higher survival and improved growth rate will reduce the considerable expense of hatchery-nursery resisdence time and thereflore the production costs. BARD supported our research for one year only and the support was given to us

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Koven, William, Gordon Grau, Benny Ron, and Tetsuya Hirano. Improving fry quality, survival and growth in commercially farmed fish by dietary stimulation of thyroid hormone production in premetamorphosing larvae. United States Department of Agriculture, 2004. http://dx.doi.org/10.32747/2004.7695856.bard.

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There is a direct correlation between successful metamorphosis from larvae to post-larvae and the quality of the resultant juveniles or fry. Juvenile quality, in turn, is a major factor influencing fish production level and market price. However, following the profound morphological and physiological changes occurring during metamorphosis, the emerging juveniles in some species characteristically demonstrate heterotrophic growth, poor pigmentation, cannibalism and generally poor survival. The white grouper (Epinephelus aeneus) in Israel and the Pacific threadfin (Polydactylussexfilis) in Hawai

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