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Letteratura scientifica selezionata sul tema "Biocolonization"

Autore: Grafiati

Pubblicato: 14 dicembre 2024

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Articoli di riviste sul tema "Biocolonization"

Salleh, Ariel. "Resistance to Corporate Biocolonization". Organization & Environment 19, n. 3 (settembre 2006): 406–10. http://dx.doi.org/10.1177/1086026606292478.

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Hayek, M., M. Salgues, J. C. Souche, K. D. Weerdt e S. Pioch. "From concretes to bioreceptive concretes, influence of concrete properties on the biological colonization of marine artificial structures". IOP Conference Series: Materials Science and Engineering 1245, n. 1 (1 luglio 2022): 012008. http://dx.doi.org/10.1088/1757-899x/1245/1/012008.

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Abstract A main cause of biodiversity loss is artificialization of the marine environment (IPBES 2019). With 39,400 km2 of coastal and marine areas already encroached upon by human infrastructure and an increasing demand on space due to the growing global population – projected to reach 9 billion by 2050 – it is clear that humanity needs to find ways to prevent its activities from endangering biodiversity. To this end, since the 1990s ecologists have been trying to develop a win-win approach that unites ecological engineering with civil engineering. Today, civil engineers have a responsibility to incorporate eco-design processes in all construction projects underway to ensure that the latter benefit both humans and nature. Then, the new challenge of the 21st century is to develop eco-designed concretes that, in addition to their usual properties, provide improved bioreceptivity in order to enhance marine biodiversity without affecting the structure durability. The aim of this study is to master, clarify and classify the intrinsic parameters that influence the bioreceptivity (biocolonization) of cementitious materials in the marine environment. By using biofilm-culture-method (biofilm quantification), this study shows that the use of rough surface or slag cement CEM III and the surface treatment with green formwork oil enhance the biocolonization of cementitious materials in the marine environment whereas the application of curing agent (hydrophobic surface coating) has the opposite effect. Among the influent parameters, surface roughness proved to be the factor that promotes biocolonization most effectively.

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Hayek, Mahmoud, Marie Salgues, Jean-Claude Souche, Etienne Cunge, Cyril Giraudel e Osanne Paireau. "Influence of the Intrinsic Characteristics of Cementitious Materials on Biofouling in the Marine Environment". Sustainability 13, n. 5 (1 marzo 2021): 2625. http://dx.doi.org/10.3390/su13052625.

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Coastal marine ecosystems provide essential benefits and services to humanity, but many are rapidly degrading. Human activities are leading to significant land take along coastlines and to major changes in ecosystems. Ecological engineering tools capable of promoting large-scale restoration of coastal ecosystems are needed today in the face of intensifying climatic stress and human activities. Concrete is one of the materials most commonly used in the construction of coastal and marine infrastructure. Immersed in seawater, concretes are rapidly colonized by microorganisms and macroorganisms. Surface colonization and subsequent biofilm and biofouling formation provide numerous advantages to these organisms and support critical ecological and biogeochemical functions in the changing marine environment. The new challenge of the 21st century is to develop innovative concretes that, in addition to their usual properties, provide improved bioreceptivity in order to enhance marine biodiversity. The aim of this study is to master and clarify the intrinsic parameters that influence the bioreceptivity (biocolonization) of cementitious materials in the marine environment. By coupling biofilm (culture-based methods) and biofouling (image-analysis-based method and wet-/dry-weight biomass measurement) quantification techniques, this study showed that the application of a curing compound to the concrete surface reduced the biocolonization of cementitious materials in seawater, whereas green formwork oil had the opposite effect. This study also found that certain surface conditions (faceted and patterned surface, rough surface) promote the bacterial and macroorganism colonization of cementitious materials. Among the parameters examined, surface roughness proved to be the factor that promotes biocolonization most effectively. These results could be taken up in future recommendations to enable engineers to eco-design more eco-friendly marine infrastructure and develop green-engineering projects.

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Eyssautier-Chuine, Stéphanie, Kamel Mouhoubi, Fany Reffuveille e Jean-Luc Bodnar. "Thermographic imaging for early detection of biocolonization on buildings". Building Research & Information 48, n. 8 (9 marzo 2020): 856–65. http://dx.doi.org/10.1080/09613218.2020.1730740.

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Genova, Chiara, Elsa Fuentes, Gabriele Favero e Beatriz Prieto. "Evaluation of the Cleaning Effect of Natural-Based Biocides: Application on Different Phototropic Biofilms Colonizing the Same Granite Wall". Coatings 13, n. 3 (26 febbraio 2023): 520. http://dx.doi.org/10.3390/coatings13030520.

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Natural derivatives, such as essential oils, are presented as an alternative to classical biocides to the treatment of biocolonization. Thus, in this work, the cleaning and biocidal potential of some natural derivatives towards two natural biofilms’ growth on the same granite wall, with different microbial composition, was evaluated. For this purpose, three essential oils (EOs) (from Origanum vulgare, Thymus vulgaris and Calamintha nepeta) and their main active principles (APs) (carvacrol, thymol and R-(+)-pulegone, respectively) were embedded in a hydrogel matrix, with different combinations of EOs and APs, in order to evaluate the synergistic action of different actives. For comparative purposes, pure hydrogel and a mechanical method (brushing) were also used. Colorimetric measurements and chlorophyll a fluorescence analyses were performed to evaluate the cleaning action of the treatments on the biofilms. Overall, the EOs and APs present in the hydrogel proved to be reliable treatments to limit natural biocolonization, with O. vulgare being one of the most effective treatments in combination with other compounds, due to the majority presence of carvacrol. Moreover, the effect of the different treatments strictly depended on the biofilm in question, as well as its ability to adhere to the substrate.

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Mughal, Quratulain, e Wajid Hussain. "Deconstructing the Discursive Construction of Environmental Colonialism in Native America: A Study of Leslie Marmon Silko’s Ceremony and Almanac of the Dead". International Journal of English Linguistics 9, n. 3 (29 maggio 2019): 365. http://dx.doi.org/10.5539/ijel.v9n3p365.

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This paper deconstructs the Europeans’ environmental colonialism in Native America and, in that, elucidates that the rhetorical tactics and fundamental motivations, which are employed to ‘other’ people, are essentially the same as those used to ‘other’ environment and nature with all of its ecological subjects. A qualitative content analysis, the study investigates this notion in Leslie Marmon Silko’s Ceremony and Almanac of the Dead in the light of the joint critique of biocolonization and critical discourse analysis. Linguistically, it applies Fairclough’s approach of critical discourse analysis focusing on three scenarios of discourse: an acceptance of difference, an accentuation of difference, and an attempt to resolve difference. Through this critique of power, hegemony and identity, the research highlights the Natives’ objectification and representation by the white colonizer and the subsequent resistance by the Natives. The analysis reveals how the process of environmental colonialism, specifically biopiracy and biocolonization, is naturalized by the colonizer through discourse structure. Additionally, it deconstructs this discourse structure to attempt to resolve the difference exploited by the colonizer to exercise their colonial practice over the natives and their environment. Hence, the study discursively adds to the existing solutions to combat the environmental colonialism.

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Aires-Barros, L., M. J. Basto, R. C. Graça, A. Dionisio, F. M. A. Henriques, J. Delgado Rodrigues e A. E. Charola. "Cleaning of the Tower of Belem / Reinigen des Turmes von Belem". Restoration of Buildings and Monuments 4, n. 6 (1 dicembre 1998): 641–52. http://dx.doi.org/10.1515/rbm-1998-5322.

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Abstract The cleaning of the exterior masonry of the Tower of Beiern proceeded according to schedule. It was carried out by application of water nebulization, light brushing and final rinsing by nebulized water. Areas that had more resistant stains, received extra brushing while wet and for harder crusts, such as found under corbels or recessed areas, microabrasion was used in conjunction with careful scalpel scraping where necessary. Grey areas resulting from endolithic biocolonization became evident as the cleaning progressed and given the scheduling constraints for the completion of the project, these areas received a lime-wash to give this monument visual homogeneity.

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Charola, Asuncion Elena, Christopher McNamara e Robert J. Koestler. "Biocolonization of Stone: Control and Preventive Methods: Proceeedings from the MCI Workshop Series". Smithsonian Contributions to Museum Conservation, n. 2 (2011): 1–115. http://dx.doi.org/10.5479/si.19492359.2.1.

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Charola, A. E., J. Delgado Rodrigues e M. Vale Anjos. "Entstellende Bewuchsmuster nach einer Hydrophobierung / Disfiguring Biocolonization Patterns after the Application of Water Repellents". Restoration of Buildings and Monuments 14, n. 5 (1 ottobre 2008): 365–72. http://dx.doi.org/10.1515/rbm-2008-6241.

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Charola, A. Elena, e Eberhard Wendler. "An Overview of the Water-Porous Building Materials Interactions". Restoration of Buildings and Monuments 21, n. 2-3 (1 giugno 2015): 55–65. http://dx.doi.org/10.1515/rbm-2015-2006.

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Abstract Water is one of the key deterioration factors for porous building materials and has the capability of enhancing the deleterious effect of other factors such as air pollution and biocolonization, among others. The focus of the paper is the interaction of water with the porous inorganic materials: how does water enter the pore system, and how does it leave it? How does the presence of clays or soluble salts in porous materials affect these mechanisms? Pairwise examples are provided to illustrate the varying behavior of water in different materials. Also addressed is the importance of the pore size distribution on the behavior of water and its transport mechanisms. The aim of the paper is to synthesize the key points required to understand why water enters a porous system, in what way it is distributed within it, and the slow manner in which it departs, since time of wetness is fundamental in enhancing the effect of co-factors.

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Più fonti

Tesi sul tema "Biocolonization"

Bhattacharya, Sriradha. "Investigation of marble limestone biocolonization: the case study of Convento das Maltezes in Estremoz". Master's thesis, Universidade de Évora, 2018. http://hdl.handle.net/10174/27699.

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Over centuries, different lithotypes – either calcitic such as limestones and marbles, and/or silicious such as sandstones and granites have been used in historical monuments, whose deterioration/degradation differs as per the hardness, porosity and chemical composition of each stone. However, over the last decades living microorganisms have been associated with structural and aesthetical damages to building stone in historical monuments. The current research focuses on the investigation of degradation/deterioration in architectural marble monuments, with the aim to contribute to a better understanding the role of microbial agents on the biodegradation/biodeterioration of monuments built in marble. A multidisciplinary approach was employed to perform material characterisation and alteration products detection involving in situ and laboratory analysis in order to arrive at a comprehensive assessment of biocolonisation. Studying the microbial proliferation gave a wider perspective on recognising the role of microorganisms and their ability to degrade cultural heritage materials, which in turn helps understand and chalk out a mitigation process for future. The micro-analytical techniques distinguished and identified the alterations processes like patina formation, pigmentation and biofilms formation. The biocontamination was characterised by SEM-EDS, culture-dependent methods (CDM) and Next Generation Sequencing (NGS). CDM and NGS confirm the presence of several strains of bacteria, filamentous fungi and yeasts that appears to contribute to the presence of calcium oxalates, carotenoids and biofilms formation. Thus, it is imperative to study and comprehend the causes for marble degradation/deterioration, and recognise the source for the alteration of these materials, in order to define effective strategies to prevent marble decay and safeguard our cultural heritage; RESUMO: Biocolonização de pedra calcária: O caso de estudo do Convento das Maltesas em Estremoz Ao longo dos séculos, diferentes litotipos - calcíticos, como calcários e mármores, e / ou siliciosos como arenitos e granitos - têm sido utilizados em monumentos históricos, cuja degradação/deterioração difere de acordo com a dureza, porosidade e composição química de cada pedra. Nas últimas décadas, a presença de microrganismos tem sido associada a danos estruturais e estéticos de pedra utilizada em monumentos históricos. O presente trabalho tem como objetivo o estudo da degradação/deterioração de mármore aplicado em património arquitetónico, com o objetivo de contribuir para uma melhor compreensão do papel dos agentes microbianos na biodegradação/biodeterioração deste material, em contexto histórico. Foi utilizada uma abordagem multidisciplinar na caracterização de materiais e na deteção de produtos de alteração, envolvendo análises in situ e em laboratório, no sentido de obter uma avaliação abrangente da biocolonização. O estudo da proliferação microbiana permite uma perspetiva mais ampla no reconhecimento do papel dos microrganismos e da sua capacidade para degradar os materiais do património cultural, o que, por sua vez pode vir a ser útil na definição de estratégias de mitigação, para o futuro. As técnicas microanalíticas permitiram distinguir e identificar alguns processos de alteração, como formação de pátinas, pigmentação e formação de biofilmes. A biocontaminação foi caracterizada por SEM-EDS, através de métodos dependentes de cultura (CDM) e por Sequenciação de Nova Geração (NGS). CDM e NGS confirmam a presença de várias espécies de bactérias, fungos filamentosos e leveduras que parecem contribuir para a presença de oxalatos de cálcio, formação de carotenóides e de biofilmes. Assim , é imperativo estudar e compreender as causas da degradação/deterioração do mármore, e reconhecer os agentes responsáveis pela alteração destes materiais, de forma a que possam ser definidas estratégias eficientes para prevenção do seu declínio, contribuindo para a salvaguarda dos nossos bens patrimoniais.

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Dubois, Antoine. "Comparative analysis of biocolonization of stuctures in the presence of artificial reefs and impact on the acceptability of Marine Renewable Energies". Electronic Thesis or Diss., Nantes Université, 2024. http://www.theses.fr/2024NANU4023.

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Afin de limiter le changement climatique lié à l’utilisation d’énergies fossiles, certaines nations se tournent vers l’utilisation de sources d’énergies renouvelables notamment d'origine éolienne. Bénéficiant des acquis et technologies de l’industrie pétrolière offshore, l’industrie éolienne a pu s’étendre vers la haute mer. Toutefois, avec des enjeux environnementaux et sociétaux, ce déplacement vers le large n’est pas sans impacts. En effet, les éoliennes en mer peuvent engendrer des effets indésirables sur la vie marine. La littérature montre également une colonisation rapide des structures immergées par des communautés benthiques sessiles. Cette biocolonisation peut impacter ce secteur en plein essor en modifiant les paramètres des composants immergés de façon significative. Dans ce manuscrit ce point a été étudié via l’analyse de médias sous-marins de lignes d'ancrages d’une éolienne flottante française. En parallèle, les perceptions et inquiétudes de communautés côtières du Nord-Est des États- Unis et de I ‘Ouest de la France ont été recueillies. Ceci a permis de mettre en évidence les préoccupations récurrentes sur les impacts sur la biodiversité marine ou la pêche locale. Ces résultats ont par la suite permis de développer un concept de — structure d'atténuation des effets environnementaux pour éolienne flottante. Le concept, exposé auprès de communautés littorales américaines et françaises, a permis de quantifier la volonté de payer pour son application dans les futurs parcs éoliens flottants. Enfin, ce concept de structure a été le sujet de tests à échelle réduite au large des Sables d’ Olonne
In order to limit climate change linked to the use of fossil fuels, some nations are turning to the use of renewable energy sources, particularly wind power. Benefiting from the experience and technologies of the offshore oil industry, the wind energy industry has been able to expand into the open sea. However, with environmental and societal issues at stake, this move offshore is not without its impacts. Offshore wind turbines can have undesirable effects on marine life. The literature also shows the rapid colonization of submerged structures by sessile benthic communities. This biocolonization can impact this booming sector by significantly altering the parameters of submerged components. In this manuscript, this point was investigated via underwater media analysis of French floating wind turbine anchor lines. In parallel, the perceptions and concerns of coastal communities in the Northeastern USA and Westem France were collected. This highlighted recurring concerns about impacts on marine biodiversity or local fisheries. These results were subsequently used to develop a concept for an environmental mitigation structure for floating wind turbines. The concept, presented to coastal communities in the USA and France, quantified the willingness to pay for its application in future floating wind farms. Finally, the concept was tested on a reduced scale off the coast of Les Sables d’Olonne

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Libri sul tema "Biocolonization"

Smithsonian Museum Conservation Institute Workshop on Biocolonization of Stone: Control and Preventive Methods (Washington, D.C. 2009). Biocolonization of stone: Control and preventive methods : proceedings from the MCI workshop series. Washington, D.C: Smithsonian Institution Scholarly Press, 2011.

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Capitoli di libri sul tema "Biocolonization"

Grissom, Carol A., Jane Sledge e A. Elena Charola. "Unusual Design Influences a Building’s Biocolonization Pattern and Complicates Remediation". In 10th International Symposium on the Conservation of Monuments in the Mediterranean Basin, 179–87. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-78093-1_18.

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Atti di convegni sul tema "Biocolonization"

Gautier, Sandrine, Bernard Duchesne, Hassan Tahi, Robert Rosa, Jean-Marie A. Parel, Emmanuel Lacombe, Gerrit Beumer e Hans J. Griesser. "Surface-modified porous PTFE for keratoprostheses: biocolonization in the rabbit cornea". In BiOS '97, Part of Photonics West, a cura di Pascal O. Rol, Karen M. Joos e Fabrice Manns. SPIE, 1997. http://dx.doi.org/10.1117/12.275104.

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Bakhtiari, Arash, Franck Schoefs e Hamed Ameryoun. "A Unified Approach for Estimating of the Drag Coefficient in Offshore Structures in Presence of Bio-Colonization". In ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/omae2018-78757.

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Due to increase of global demand for renewable energies, assessment of environmental forces become an important aspect of offshore structures which is the key to ensure optimized and reliable development of this industry. The present study aims to bring out an integrated approach to drag coefficient estimation for circular cylinders covered by biocolonization. Hard and long flapping (Kelp) species were chosen as the study area to demonstrate the effect of biofouling. An integrated approach including the percentage of cover, surface roughness ratio, biofouling species, and aggregating pattern was employed to investigate the steady state drag force coefficient. Several experimental data were collected from previous researchers considering afore-mentioned parameters. This paper proposes two independent equations for hard and long flapping biofouling using regression analysis method. Both equations were compared with experimental data; a multivariate statistical analysis by Taylor diagram was also performed resulting in reasonable values. It is worth mentioning that the present work is part of a wider study concerning the effects of biofouling components on the hydrodynamic forces of structures such as jackets and floating offshore structures. The first part of the study considered the investigation of the existing data.

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