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Literatura académica sobre el tema "Bactera"

Autor: Grafiati

Publicado: 25 de enero de 2025

Última modificación: 31 de julio de 2025

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Artículos de revistas sobre el tema "Bactera"

Yadav, Amresh Kumar, Sanjeev Kumar Ambasta, Surendra Kumar Prasad, and M. P. Trivedi. "IN VITRO EVALUATION OF ANTIBACTERIAL PROPERTY OF CATHARANTHUS ROSEUS (LINN.) G. DON. VAR. “ROSEA” AND “ALBA”." International Journal of Pharmacy and Pharmaceutical Sciences 10, no. 5 (2018): 55. http://dx.doi.org/10.22159/ijpps.2018v10i5.24977.

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Objective: To evaluate the antibacterial property of crude, aqueous and organic solvent extract from leaf, stem and root parts of two different var. of Catharanthus roseus (i.e. “rosea” and “alba”) under in vitro conditions on various human pathogenic bacteria.Methods: Antibacterial activity of crude (fresh), aqueous, ethanolic, methanolic and equimolar (1:1) mixture of ethanolic dried leaf extract of variety “rosea” and “alba” was evaluated against various pathogenic bacteria viz. Bacillus subtilis, Escherichia coli and Staphylococcus aureus by disk diffusion method under in vitro conditions.

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Kim, Dong-Seon, Joo-Hwan Roh, Chang-Won Cho, and Jin-Yeul Ma. "Analysis of Nodakenetin from Samultangs Fermented by Lactose Bactera Strains." Korea Journal of Herbology 27, no. 1 (2012): 35–39. http://dx.doi.org/10.6116/kjh.2012.27.1.35.

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Grabowska-Markowska, Jolanta, Iwona Pawłowska, Grzegorz Ziółkowski, and Jadwiga Wójkowska-Mach. "BACTERIA CAUSED BY OCHROBACTRUM ANTHROPI – UNUSUAL BEHAVIOR." Wiadomości Lekarskie 72, no. 3 (2019): 489–92. http://dx.doi.org/10.36740/wlek201903131.

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O. anthropi, formerly known as Achromobacter, is an aerobic, Gram-negative bacillus, widespread in the environment, in various ecological niches. Currently, it is an emerging opportunistic microorganism associated with health care, as well as infections in people with immunodeficiency, mainly in children and newborns. The authors of the presented work present a case of a 13-year-old female patient with a neurodegenerative disorder in which O. anthropi was isolated from blood cultures. She was hospitalized in the Social Society of the Cordis Hospice in Katowice, and after discharge from the hos

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NAKAGAWA, Masaya, and Norihiko MISAWA. "Analysis of Carotenoid Glycosides Produced in Gram-negative Bactera by Introduction of the Erwinia uredovora Carotenoid Biosynthesis Genes." Agricultural and Biological Chemistry 55, no. 8 (1991): 2147–48. http://dx.doi.org/10.1271/bbb1961.55.2147.

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Jin, Tianru, and R. G. E. Murray. "Urease activity related to the growth and differentiation of swarmer cells of Proteus mirabilis." Canadian Journal of Microbiology 33, no. 4 (1987): 300–303. http://dx.doi.org/10.1139/m87-051.

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Urease activity was measured using whole cells of both long (swarming) and short (nonswarming) populations of Proteus mirabilis from casein hydrolysate agar (CHA) and broth (CHB) cultures, and from brain heart infusion broth (BHIB) cultures. Urease is a constitutive enzyme for both long and short cells, but its activity was tremendously increased when urea was incorporated into the media. Urease production was also affected by culture age and media used. Before exponential phase, urease activity was very low, and it increased to its highest point after about 4 h in BHIB and 8 h in both CHA and

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Laura, Abisaí Pazos-Rojas, Rodríguez-Andrade Osvaldo, Catalina Muñoz-Arenas Ligia, et al. "Desiccation-Tolerant Rhizobacteria Maintain their Plant Growth- Promoting Capability after Experiencing Extreme Water Stress." SciFed Journal of Applied Microbiology 1, no. 1 (2018): 1–13. https://doi.org/10.5281/zenodo.5068936.

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Abstract Bacteria from rhizosphere have the potential to promote the growth of plants, and could be used as inoculants to increase the crop profitability. However, under drought stress conditions, the number of bacteria associated to seeds could decrease below the minimal number of bacteria required to obtain a positive plant response. At the present work, the capability of 28 rhizospheric bacterial strains to tolerate 18 days of air desiccation stress (at 30oC and 50% of relative humidity) was evaluated. Results showed different levels of bacterial tolerance and five categories were proposed

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Oktanauli, Poetry. "The Effect of Herbal Mouthwash against Halitosis in Elderly." Jurnal Ilmiah dan Teknologi Kedokteran Gigi 16, no. 1 (2020): 25. http://dx.doi.org/10.32509/jitekgi.v16i1.611.

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Introduction: Elderly generally experience a decreased in the level of oral hygiene, number of teeth, mucosal sensitivity of the oral cavity and xerostomia. Xerostomia can cause halitosis. One of halitosis therapy is by using herbal mouthwash (betel leaf). Betel leaf has an antibacterial, antioxidant and antifungal ability. The purpose of this study was to provide information on the benefits of herbal mouthwash on decreasing halitosis score in elderly. Methods: This was a clinical experimental research with cross sectional approach. Spearman correlation test was used to determine the effect of

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Juárez-González, Victor Rivelino, Victor Hugo Guadarrama-Pérez, David Vasco-Julio, Elian Yuritzi Alegría-Herrera, and Jesús Hernández-Romano. "Las endolisinas de fagos como una fuente alternativa para la eliminación de bacterias multirresistentes." Alianzas y Tendencias BUAP 9, no. 34 (2024): 40–64. https://doi.org/10.5281/zenodo.12502858.

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RESUMEN En los últimos 20 años, el uso indiscriminado de antibióticos en humanos para el tratamiento de enfermedades bacterianas, ha promovido el rápido desarrollo de microorganismos multidrogorresistentes (MDR). La Organización Mundial de la Salud (OMS) liberó en 2017 una lista de bacterias para las que se requieren urgentemente nuevos antibióticos, clasificándolas en tres categorías: 1) crítica, 2) de alta prioridad o 3) media prioridad. Dichas cepas, si no son atendidas en el corto plazo, probablemente provoquen una nueva

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Tovkach, F. I., and G. I. Zhuminska. "Destabilization of the Phage-Bacteria System during Bacterial Infections of Tree Plants." Mikrobiolohichnyi Zhurnal 81, no. 4 (2019): 118–30. http://dx.doi.org/10.15407/microbiolj81.04.118.

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Ali, Zainab Haider, Wurood Hamzah Muttaleb, and Lubna Abdulazeem. "Anti-Bacterial Action of Silver Nanoparticles Against MDR Bacteria Isolated from Hospital." International Journal of Medical Science and Dental Health 10, no. 10 (2024): 93–99. http://dx.doi.org/10.55640/ijmsdh-10-10-11.

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Hospital-associated infections (HAIs) are considered to be a major source of infections in patients, especially in patients with permanently impaired immunity. There is alarming increase of multi drug resistant (MDR) bacteria and Antibacterial medication resistance has been deemed a serious hazard to public health by the World Health Organisation (WHO). The study aimed to isolate and identify main bacteria caused nosocomial infection, and trying to treatments by using nanoparticles. By measuring the antibacterial activity of the synthesised AgNPs using the agar disc diffusion technique, AgNPs

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Tesis sobre el tema "Bactera"

Thomas, Lee. "Genetic methods for Rapid Detection of Medically Important Nosocomial Bactera." Thesis, The University of Sydney, 2007. http://hdl.handle.net/2123/3575.

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The role of the microbiology laboratory is (1) to provide infection control information, so that highly transmissible isolates may be identified and appropriate control measures instigated as rapidly as possible and (2) to provide adequate information to the clinician enabling correct antibiotic choices to be made, particularly in the critically ill. Microbiological data is by definition slow as it is culture dependent: this study focused on the development of genetic, culture-independent methods for detection of resistance in nosocomial pathogens that could be introduced into the routine micr

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Thomas, Lee. "Genetic methods for Rapid Detection of Medically Important Nosocomial Bactera." University of Sydney, 2007. http://hdl.handle.net/2123/3575.

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Master of Science<br>The role of the microbiology laboratory is (1) to provide infection control information, so that highly transmissible isolates may be identified and appropriate control measures instigated as rapidly as possible and (2) to provide adequate information to the clinician enabling correct antibiotic choices to be made, particularly in the critically ill. Microbiological data is by definition slow as it is culture dependent: this study focused on the development of genetic, culture-independent methods for detection of resistance in nosocomial pathogens that could be introduced

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Almeida, Beatriz Silveira Viana de. "Análise do proteoma do fluído intercelular de folhas de laranjeiras infectadas com Xylella fastidiosa." Universidade de São Paulo, 2002. http://www.teses.usp.br/teses/disponiveis/11/11138/tde-24072002-164115/.

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Com o objetivo de compreender os mecanismos que regulam a interação citros-Xf procurou-se identificar e caracterizar proteínas com acúmulo diferencial no apoplasto de folhas de Citrus sinensis var. Pêra infectadas com Xf, apresentando ou não sintomas de CVC, através de eletroforese bidimensional em géis de poliacrilamida desnaturante e espectrometria de massa (MALDI-ToF). O fluído intercelular (FI) foi extraído de folhas de laranjeira cultivadas em campos experimentais. A presença ou ausência do patógeno foi confirmada por amplificação, através de PCR, de fragmentos específicos de DNA da bacté

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Bou, habib Michèle. "Développement et analyse d'un modèle dynamique d'attaque de phages lors de l'acidification du lait pour la fabrication du fromage." Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPASB061.

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Avec l'augmentation de la demande pour les produits fromagers, l'optimisation des procédés de production est devenue essentielle. L'une des premières étapes de la fabrication du fromage est l'acidification du lait, qui influence fortement les propriétés organoleptiques, la texture et la sécurité du produit final. Elle consiste à convertir le lactose, sucre du lait, en acide lactique par des bactéries lactiques. Cependant, ces bactéries sont sensibles aux attaques de virus appelés bactériophages. Ces attaques peuvent entraîner la lyse bactérienne, retardant ou arrêtant l'acidification, ce qui e

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Moyà, Anderico Laura. "Deciphering the utility of Galleria mellonella as an infection and toxicity in vivo model." Doctoral thesis, Universitat de Barcelona, 2021. http://hdl.handle.net/10803/671803.

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Galleria mellonella (greater wax moth) is a popular animal model that has been extensively used as an alternative in vivo model for investigating the virulence and pathogenicity of different bacteria. G. mellonella has also been shown to be a suitable model for studying the efficacy and toxicity of various compounds. Recently, this model has been gaining popularity as the larvae are conveniently sized for manipulation, they do not need constant feeding, they are inexpensive to purchase and to breed, they do not require much space or special infrastructure, they present a low biohazard risk, an

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de, Klerk Nele. "Host-bacteria interactions : Host cell responses and bacterial pathogenesis." Doctoral thesis, Stockholms universitet, Institutionen för molekylär biovetenskap, Wenner-Grens institut, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-126425.

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Helicobacter pylori colonizes the human stomach, where it causes gastritis that may develop into peptic ulcer disease or cancer when left untreated. Neisseria gonorrhoeae colonizes the urogenital tract and causes the sexually transmitted disease gonorrhea. In contrast, Lactobacillus species are part of the human microbiota, which is the resident microbial community, and are considered to be beneficial for health. The first host cell types that bacteria encounter when they enter the body are epithelial cells, which form the border between the inside and the outside, and macrophages, which are i

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Gaviria, Cantín Tania Cristina. "Factores Gre de Salmonella enterica serovar Typhimurium, su papel en el control de la filosofía y patogenicidad." Doctoral thesis, Universitat de Barcelona, 2016. http://hdl.handle.net/10803/397788.

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El género Salmonella, está compuesto de bacterias Gram-negativas, no esporuladas, en forma de bacilo. Salmonella tiene importante relevancia a nivel de salud pública ya que es uno de los principales patógenos entéricos tanto en países desarrollados como en vías de desarrollo. En los casos de gastroenteritis notificados en España, Salmonella se posiciona en segundo lugar, después de Campylobacter. En este trabajo se utilizó como organismo modelo de estudio S. enterica serovar Typhimurium (S. Typhimurium), que en humanos causa salmonelosis, gastroenteritis caracterizada por diarrea inflamatoria,

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Kassotaki, Elissavet. "Elimination of micropollutants in conventional and novel nitrogen removal processes. A comparative assessment of diverse microbial communities capabilities." Doctoral thesis, Universitat de Girona, 2018. http://hdl.handle.net/10803/664342.

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Pharmaceutically active compounds (PhACs) and endocrine disrupting compounds (EDCs) can pose a significant risk to the environment and human health, undermining prosperity. Current wastewater treatment plants (WWTPs) cannot efficiently act as barriers to their release and have been identified as main points of discharge and contamination. The present thesis aimed to investigate the fate of five PhACs (ibuprofen, sulfamethoxazole, metoprolol, carbamazepine and venlafaxine) and five EDCs (estrone, 17β-estradiol, estriol, 17α-ethinylestradiol and bisphenol A) in different systems simulating waste

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Lawlor, Kirsten. "Distribution of bacteria and bacterial plasmids in lake water sediments." Thesis, University of Liverpool, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240596.

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Chvalkovská, Eva. "Využití různých metod izolace DNA baktérií mléčného kvašení v molekulárně biologických metodách." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2019. http://www.nusl.cz/ntk/nusl-401889.

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This thesis focused on the probiotic bacteria, DNA isolated from these bacteria by three different methods and the effect of isolation on DNA identification using molecular biological methods. Probiotic bacteria are an important part of human intestinal tract. They have an important role in the function of the immune system due to adhesion to the mucosa of the intestinal flora. They create a inhostile environment for pathogens. Probiotic bacteria are commonly taken in the food like dairy products or food supplements. However, overuse of antibiotics is at risk of passing on the intrinsic resist

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Libros sobre el tema "Bactera"

Ernst, Joel D., and Olle Stendahl, eds. Phagocytosis of Bacteria and Bacterial Pathogenicity. Cambridge University Press, 2006. http://dx.doi.org/10.1017/cbo9780511541513.

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D, Ernst Joel, and Stendahl Olle, eds. Phagocytosis of bacteria and bacterial pathogenicity. Cambridge University Press, 2006.

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J, Dring G., Gould G. W, Ellar D. J, Federation of European Microbiological Societies., Society for Applied Bacteriology, and International Symposium on "Fundamental and Applied Aspects of Bacterial Spores" (1982 : University of Cambridge), eds. Fundamental and applied aspects of bacterial spores. Academic Press, 1985.

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de, Reuse Hilde, and Bereswill Stefan, eds. Microbial pathogenomics. Karger, 2009.

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Marshall, William. Of microbes and men: The emotions, drama, and mystery of a struggle to correct a 125-year-old mistake and improve our defenses against epidemics and bioterrorism : a public affairs book. AuthorHouse, 2008.

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Wyatt, G. M. Immunoassays for Food-poisoning Bacteria and Bacterial Toxins. Springer US, 1992. http://dx.doi.org/10.1007/978-1-4615-2001-6.

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A, Lee H., and Morgan M. R. A, eds. Immunoassays for food-poisoning bacteria and bacterial toxins. Chapman & Hall, 1992.

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Wyatt, G. M. Immunoassays for Food-poisoning Bacteria and Bacterial Toxins. Springer US, 1992.

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Capítulos de libros sobre el tema "Bactera"

Christensen, Henrik, and Werner Nicklas. "Bacteria and Bacterial Diagnostics." In Laboratory Animal Science and Medicine. Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-59103-7_10.

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Gul Guven, Reyhan, and Kemal Guven. "Bacterial Toxins." In Food Safety. Nobel Tip Kitabevleri, 2024. http://dx.doi.org/10.69860/nobel.9786053358787.5.

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In the globalizing world, food safety and food-borne pathogenic microorganisms are among the important public health problems. There are more than 250 known foodborne diseases and many different types of viruses, bacteria, parasites, toxins, metals and prions that cause these diseases. Toxic molecules generated by bacteria, whether within or outside the organisms, are commonly referred to as "toxins". Toxins serve as the primary virulence factors generated by a multitude of bacteria responsible for causing severe illnesses in both humans and animals. Toxins are the primary bacterial component

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Cohan, Frederick M. "Genomes reveal the cohesiveness of bacterial species taxa and provide a path towards describing all of bacterial diversity." In Trends in the systematics of bacteria and fungi. CABI, 2021. http://dx.doi.org/10.1079/9781789244984.0282.

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Abstract This book chapter argues that bacterial systematists of the mid-20th century fortuitously created a species-level systematics that actually fits an important universal theory of speciation by discussing taxonomy would allow us to infer the important characteristics of any unknown organism once we classify it to species. It turns out, unexpectedly, that bacterial species taxa share a species-like property with the species taxa of zoology and botany. While recombination within species taxa of all these groups fails to prevent diversification within species, recombination nevertheless ap

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Lawley, Trevor, Brian M. Wilkins, and Laura S. Frost. "Bacterial Conjugation in Gram-Negative Bacteria." In Plasmid Biology. ASM Press, 2014. http://dx.doi.org/10.1128/9781555817732.ch9.

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Mikulska, Malgorzata. "Neutropenic Fever." In The EBMT Handbook. Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-44080-9_35.

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AbstractFever during neutropenia is almost universal after an HCT. In neutropenic HCT recipients, clinicians are faced with a unique combination of issues: (1) high incidence of bacterial bloodstream infections, (2) high mortality in case of infections due to Gram-negative bacteria unless effective antibiotic treatment is provided promptly, and (3) numerous causes of fever other than bacterial infection.

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Malinowska, Agnes. "Bacteria." In Microbium. punctum books, 2023. http://dx.doi.org/10.53288/0396.1.04.

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Bacteria have played a truly outsized role in the evolutionary story of life on earth, and they continue to be crucial to sustaining organisms and ecosystems. Until recently, however, most cultural and scientific interest in bacteria has centered on defeating the nefarious “germ.” This entry focuses in particular on how public health efforts to reign in the threat of bacterial disease in the US around 1900 aligned with the aspirations of a hegemonic Anglo-American culture to control and suppress marginalized groups like immigrants and racial others, easy scapegoats for disease. At the same tim

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Lefèvre, Christopher T., Fernanda Abreu, Ulysses Lins, and Dennis A. Bazylinski. "A Bacterial Backbone: Magnetosomes in Magnetotactic Bacteria." In Metal Nanoparticles in Microbiology. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-18312-6_4.

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Wood, A. P., F. J. Warren, and D. P. Kelly. "Methylotrophic Bacteria in Trimethylaminuria and Bacterial Vaginosis." In Handbook of Hydrocarbon and Lipid Microbiology. Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-540-77587-4_245.

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Paterson, Jamie, Martín López-García, Joseph Gillard, Thomas R. Laws, Grant Lythe, and Carmen Molina-París. "Analysis of Single Bacterium Dynamics in a Stochastic Model of Toxin-Producing Bacteria." In Lecture Notes in Computer Science. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-91825-5_13.

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AbstractWe stochastically model two bacterial populations which can produce toxins. We propose to analyse this biological system by following the dynamics of a single bacterium during its lifetime, as well as its progeny. We study the lifespan of a single bacterium, the number of divisions that this bacterium undergoes, and the number of toxin molecules that it produces during its lifetime. We also compute the mean number of bacteria in the genealogy of the original bacterium and the number of toxin molecules produced by its genealogy. We illustrate the applicability of our methods by consider

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Sveinsdottir, Maney, Margret Audur, and Johann Orlygsso. "Ethanol and Hydrogen Production with Thermophilic Bactera from Sugars and Complex Biomass." In Progress in Biomass and Bioenergy Production. InTech, 2011. http://dx.doi.org/10.5772/17404.

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Actas de conferencias sobre el tema "Bactera"

Armstrong, David, Hejian Sun, Yuxiu Liu, and Patrick Powell. "Development of an Efficient Microbiologically Influenced Corrosion (MIC) Mitigation and Control Strategy in Pipeline Pigging Operations." In CONFERENCE 2022. AMPP, 2022. https://doi.org/10.5006/c2022-17632.

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Abstract Eleven fluid samples, taken in two groups from pipeline pigging operations in the Texas Gulf Coast region were used in this study. All of the samples contained high amounts of Iron Sulfide (FeS), Sulfate Reducing Bacteria (SRB), and Acid Producing Bactera (APB) and were producing varying amounts of hydrogen sulfide (H2S). These pipelines had historically been treated with increasing amounts of glutaraldehyde and glut/quat blends, to no avail. Increasing problems associated with microbiological activity (biofilm, corrosion, FeS, H2S) required a revised treatment regime. The first part

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de Romero, Matilde F., Duque C. Zoilabet, Oladis T. de Rincón, Orlando Pérez, and Ismenia Araujo. "Hydrogen Permeation Study with Palladium in a Sulfate-Reducing Bacteria Culture." In CORROSION 2001. NACE International, 2001. https://doi.org/10.5006/c2001-01260.

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Abstract This study was undertaken to evaluate cathodic depolarization as the action mechanism triggered by sulfate-reducing bacterias (SRBs) in Microbiologically Induced Corrosion (MIC), using an inert substrate such as a 1-mm thick Palladium (Pd) strip with and without cathodic polarization, a H° permeation cell type by Devanathan and Stachurski, and the bacteria Desulfovibrio desulfuricans ssp. desulfuricans. The permeation tests were run using a de-aerated sterile culture medium inoculated with 10% D. desulfuricans at 108 cell/ml. Bacterial growth was evaluated by the serial dilution techn

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Little, Brenda J., Richard I. Ray, Patricia A. Wagner, Joanne Jones-Meehan, C. C. Lee, and Florian Mansfeld. "Marine Bacteria and Localized Corrosion on Polymer Coated Steel: Cause and Effect." In CORROSION 1999. NACE International, 1999. https://doi.org/10.5006/c1999-99183.

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Abstract Diagnosis of microbiologically influenced corrosion on iron-containing substrata exposed in marine environments cannot be based solely on spatial relationships between large accumulations of bacterial cells and iron corrosion products. Field experiments were designed to evaluate the relationship between marine bacteria and localized corrosion on coated mild steel. In all cases, the distribution of bacteria was strongly influenced by the presence of iron corrosion products independent of coating combinations. In the presence of cathodic protection, coating defects were filled with calc

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Horacek, Gary. "Biocorrosion in the Oilfield I. Experimental Methods Development; Scanning Electron Microscopy Technique." In CORROSION 1988. NACE International, 1988. https://doi.org/10.5006/c1988-88086.

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Abstract Biocorrosion is routinely encountered, but not always recognized, in the oilfield. Biocorrosion results primarily from the activities of sessile (adherent) bacteria growing in biofilms on metal surfaces. Classical microbiological methods are not appropriate for detecting or monitoring sessile bacteria. In the work reported here, biofilming bacteria, their associated exopolymer, and the early time-course events of biofilm development on steel were visualized by use of the scanning electron microscope (SEM). Scanning electron photomicrographs also show that corrosion occurred directly u

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Blackburn, Freeman E. "Detection, Monitoring, and Control of Bacterial Corrosion in a Large Middle-East Oilfield Waterflood." In CORROSION 1985. NACE International, 1985. https://doi.org/10.5006/c1985-85289.

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Abstract Bacterial attack in anaerobic water systems can be rapid and still be difficult to detect as such. Operating experience from a large Middle East water flood covered some of the pitfalls in detecting, monitoring and controling bacterial corrosion. Initial failures to culture bacteria led to chemical treatments of the water which were ineffective and in one case detrimental to bacterial control. Early chemical biocide treatments were based on such indirect techniques as corrosion coupon appearance and water quality changes. Later, when the bacteria were sucessfully cultured, they were f

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Fichter, Jennifer, Kenneth Wunch, Robert Moore, Elizabeth Summer, Shelby Braman, and Phineas Holmes. "How Hot Is Too Hot for Bacteria? a Technical Study Assessing Bacterial Establishment in Downhole Drilling, Fracturing and Stimulation Operations." In CORROSION 2012. NACE International, 2012. https://doi.org/10.5006/c2012-01310.

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Abstract Bacterial contamination from drilling and fracturing can lead to serious problems in unconventional oil and gas shale plays. Large water volumes for these processes are transported from aquifers, municipal waters, rivers, lakes, ponds or oilfield flowback water to the wellsite and stored in frac tanks or earthen impoundments. Typically, these waters are contaminated with bacteria. Furthermore, fracturing fluids contain gelling agents or polyacrylamide-based friction reducers which are readily available bacterial food sources. If these fluids are insufficiently treated, establishment o

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Campbell, Scott, Andrew Duggleby, and Angela Johnson. "Conventional Application of Biocides May Lead to Bacterial Cell Injury Rather than Bacterial Kill within a Biofilm." In CORROSION 2011. NACE International, 2011. https://doi.org/10.5006/c2011-11234.

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Abstract Mitigation of microbiological related problems, specifically, microbially influenced corrosion (MIC) is often mitigated utilizing biocides or biostatic chemicals. The use of the chemicals is often employed to control viable bacterial numbers, which would ultimately mitigate microbiological activity. However, after applying biocides for over 50 years within the petroleum industry, MIC is present and has been implicated in several critical failures. Although these failures still occur, no work has been done to establish and understand if current treatment regimes are ultimately mitigati

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Shukla, Pavan K., Roderick E. Fuentes, Andrew Nordquist, Bruce J. Wiersma, and Ingrid Pederson. "Effectiveness of Vapor Corrosion Inhibitors under Bacterial Activity for Aboveground Storage Tank Application." In CONFERENCE 2024. AMPP, 2024. https://doi.org/10.5006/c2024-20789.

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Abstract Bacterial activity is known to influence corrosion and can result in increasing soil-side corrosion of the aboveground storage tanks (ASTs) floor plates. Association for Materials Protection and Performance (AMPP) defines this phenomenon as Microbiologically Influenced Corrosion (MIC). It has been hypothesized that vapor corrosion inhibitors (VCIs) can not only function in presence of bacterial activity but can also function as biocides. Experiments were conducted to study the effect of bacterial activity on corrosion in the sand pad conditions and effect of VCIs in mitigating MIC. Va

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Franklin, Michael J., James B. Guckert, David C. White, and Hugh S. Isaacs. "Spatial and Temporal Relationships between Localized Microbial Metabolic Activity and Electrochemical Activity of Steel." In CORROSION 1991. NACE International, 1991. https://doi.org/10.5006/c1991-91115.

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Abstract The relationship between the localized microbial activity and localized electrochemical on corroding steel surfaces was investigated. The scanning vibrating electrode technique provided a sensitive means for defining local anodic and cathodic currents associated with corrosion. Localized bacterial metabolic activity was determined using autoradiography of bacterial incorporated 14C-acetate into insoluble cell material. Microautoradiography of individual bacteria, with the incorporated acetate, was used to determine percentages and morphological types of active bacteria. The results sh

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Campaignolle, X., P. Caumette, Francis Dabosi, and Jean-Louis Crolet. "The Role of Thiosulfate on the Microbially Induced Pitting of Carbon Steel." In CORROSION 1996. NACE International, 1996. https://doi.org/10.5006/c1996-96273.

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Abstract The risk of rapid pitting corrosion due to bacterial contamination has been studied by monitoring the natural coupling current flowing between two concentric electrodes. For sulfate reducing bacteria in general (SRB) and thiosulfate reducing bacteria in particular (TRB), the presence of thiosulfate and its utilization by the bacterial metabolism are shown to represent a major risk factor, leading to penetration rates greater than a centimeter per year.

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Informes sobre el tema "Bactera"

Goddard, Alan, and Rachel Pateman. Exploring the chopping board microbiome – lessons learned. Food Standards Agency, 2023. http://dx.doi.org/10.46756/sci.fsa.eaf949.

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Household surfaces are a well-known source of bacterial contamination, with ~40% of outbreaks of foodborne infections in Europe occurring at home. Whilst disease-causing bacteria may arrive in the home in contaminated food, it is also likely that many disease outbreaks are caused by poor hygiene and cross-contamination from raw food. A key site of such microbial contamination is chopping boards.

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Wilde, E. W., J. C. Radway, T. C. Hazen, and P. Hermann. Immobilization of degradative bacteria in polyurethane-based foams: embedding efficiency and effect on bacterial activity. Office of Scientific and Technical Information (OSTI), 1996. http://dx.doi.org/10.2172/565240.

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Torrungruang, Kitti, and Suchada Chutimawarapun. Antimicrobial activity against periodontopathic bacteria, cell toxicity against gingival fibroblasts and antinflammatory effect of crude extract from mangosteen. Chulalongkorn University, 2006. https://doi.org/10.58837/chula.res.2006.15.

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Extract from mangosteen pericarp has demonstrated various pharmacological activities including anti-bacterial, anti-inflammatory and anti-fungal. It may have potential for the treatment of periodontal disease, which is a chronic inflammatory disease caused by anaerobic bacteria. The aim of this study was 1) to investigate the toxicity of mangosteen extract to human gingival fibroblast, 2) to examine the anti-bacterial activity of the extract against periodontopathic bacteria including P. gingivalis and A. actinomycetemcomitans, and 3) to examine the inhibitory effect of the extract on PGE[subs

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Gottlieb, Yuval, Bradley Mullens, and Richard Stouthamer. investigation of the role of bacterial symbionts in regulating the biology and vector competence of Culicoides vectors of animal viruses. United States Department of Agriculture, 2015. http://dx.doi.org/10.32747/2015.7699865.bard.

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Symbiotic bacteria have been shown to influence host reproduction and defense against biotic and abiotic stressors, and this relates to possible development of a symbiont-based control strategy. This project was based on the hypothesis that symbionts have a significant impact on Culicoides fitness and vector competence for animal viruses. The original objectives in our proposal were: 1. Molecular identification and localization of the newly-discovered symbiotic bacteria within C. imicola and C. schultzei in Israel and C. sonorensis in California. 2. Determination of the prevalence of symbiotic

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Yedidia, I., H. Senderowitz, and A. O. Charkowski. Small molecule cocktails designed to impair virulence targets in soft rot Erwinias. United States-Israel Binational Agricultural Research and Development Fund, 2020. http://dx.doi.org/10.32747/2020.8134165.bard.

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Chemical signaling between beneficial or pathogenic bacteria and plants is a central factor in determining the outcome of plant-microbe interactions. Pectobacterium and Dickeya (soft rot Erwinias) are the major cause of soft rot, stem rot, and blackleg formed on potato and ornamentals, currently with no effective control. Our major aim was to establish and study specific bacterial genes/proteins as targets for anti-virulence compounds, by combining drug design tools and bioinformatics with experimental work. The approach allowed us to identify and test compounds (small molecules) that specific

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Beveridge, Terrance J. Composition, Reactivity and Regulation of Extracellular Metal-Reducing Structures (Bacterial Nanowires) Produced by Dissimilatory Metal - Reducing Bacteria. Office of Scientific and Technical Information (OSTI), 2004. http://dx.doi.org/10.2172/893692.

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Scholten, Johannes. Composition, Reactivity, and Regulations of Extracellular Metal-Reducing Structures (Bacterial Nanowires) Produced by Dissimilatory Metal Reducing Bacteria. Office of Scientific and Technical Information (OSTI), 2006. http://dx.doi.org/10.2172/895881.

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Nahas, Kamal. Spinning Bacteria. Asimov Press, 2025. https://doi.org/10.62211/83er-59pk.

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Brossia and Sridhar. L52103 Differentiation of Corrosion Mechanism by Morphological Feature Characterization - Experimental. Pipeline Research Council International, Inc. (PRCI), 2004. http://dx.doi.org/10.55274/r0010952.

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Natural gas pipeline systems often contain liquid water and other corrosive agents such as salts, CO2, H2S, O2, and bacteria. The ability to differentiate between corrosion mechanisms is crucial, if corrosion control and mitigation schemes are to be effective. The present project was undertaken to determine whether pipeline steels develop characteristic morphological features that are diagnostic to distinguish between abiotic and biotic pitting corrosion. The present report describes the experimental approach taken to conduct the tests. A separate report (by Exponent Failure Analysis Associate

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Jelinek, Raz, Paul Dawson, Timothy Hanks, William Pennington, and Julie Northcutt. Bacterial sensors for food processing environments. United States Department of Agriculture, 2013. http://dx.doi.org/10.32747/2013.7598157.bard.

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The overall objective of this project was to develop a new bacterial contaminant sensor based upon polydiacetylene(PDA) which is a unique polymer that changes color and configuration in response to external molecular stimuli. While this polymer has been well studied and has been shown to respond to bacterial stimuli in the laboratory, application to food processing environments has not been demonstrated. One hurdle in the application of biosensors in a food processing environment is interference of food sanitizers with the detection of bacteria. Common food sanitizers were evaluated for their

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