Relevant bibliographies by topics / Bacterial growth curve

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Bacterial growth curve'

Author: Grafiati
Published: 4 June 2021
Last updated: 15 February 2022

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Journal articles on the topic "Bacterial growth curve"

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Paulton, Richard J. L. "The bacterial growth curve." Journal of Biological Education 25, no. 2 (June 1991): 92–94. http://dx.doi.org/10.1080/00219266.1991.9655183.

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Irdawati, Irdawati, Ilsa Septia Putri, Syamsuardi Syamsuardi, Anthoni Agustien, and Yetria Rilda. "The Thermophilic Bacterial Growth Curve." Bioscience 2, no. 2 (October 30, 2018): 58. http://dx.doi.org/10.24036/0201822100819-0-00.

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Zwietering, M. H., I. Jongenburger, F. M. Rombouts, and K. van 't Riet. "Modeling of the Bacterial Growth Curve." Applied and Environmental Microbiology 56, no. 6 (1990): 1875–81. http://dx.doi.org/10.1128/aem.56.6.1875-1881.1990.

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Krishnamurthi, Venkata Rao, Isabelle I. Niyonshuti, Jingyi Chen, and Yong Wang. "A new analysis method for evaluating bacterial growth with microplate readers." PLOS ONE 16, no. 1 (January 12, 2021): e0245205. http://dx.doi.org/10.1371/journal.pone.0245205.

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Growth curve measurements are commonly used in microbiology, while the use of microplate readers for such measurements provides better temporal resolution and higher throughput. However, evaluating bacterial growth with microplate readers has been hurdled by barriers such as multiple scattering. Here, we report our development of a method based on the time derivatives of the optical density (OD) and/or fluorescence (FL) of bacterial cultures to overcome these barriers. First, we illustrated our method using quantitative models and numerical simulations, which predicted the number of bacteria and the number of fluorescent proteins in time as well as their time derivatives. Then, we systematically investigated how the time derivatives depend on the parameters in the models/simulations, providing a framework for understanding the FL growth curves. In addition, as a demonstration, we applied our method to study the lag time elongation of bacteria subjected to treatment with silver (Ag+) ions and found that the results from our method corroborated well with that from growth curve fitting by the Gompertz model that has been commonly used in the literature. Furthermore, this method was applied to the growth of bacteria in the presence of silver nanoparticles (AgNPs) at various concentrations, where the OD curve measurements failed. We showed that our method allowed us to successfully extract the growth behavior of the bacteria from the FL measurements and understand how the growth was affected by the AgNPs.
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Boonkitticharoen, Vipa, James C. Ehrhardt, and Peter T. Kirchner. "Bacterial growth kinetics: modelling and evaluation of two-compartment radioassay." Canadian Journal of Microbiology 35, no. 9 (September 1, 1989): 874–80. http://dx.doi.org/10.1139/m89-146.

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Quantitative measurements of bacterial growth may be made using a radioassay technique. This method measures, by scintillation counting, the 14CO2 derived from die bacterial metabolism of a 14C-labeled substrate. Mathematical growth models may serve as reliable tools for estimation of the generation rate constant (or slope of the growth curve) and provide a basis for evaluating assay performance. Two models, i.e., exponential and logistic, are proposed. Both models yielded an accurate fit to the data from radioactive measurement of bacterial growth. The exponential model yielded high precision values of the generation rate constant, with an average relative standard deviation of 1.2%. Under most conditions the assay demonstrated no changes in the slopes of growth curves when the number of bacteria per inoculation was changed. However, the radiometric assay by scintillation method had a growth-inhibiting effect on a few strains of bacteria. The source of this problem was thought to be hypersensitivity to trace amounts of toluene remaining on the detector.Key words: bacterial growth modelling.
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Stiller, Alison, Ashley Fink, and David Mitchell. "Bacillus cereus & Bacillus pumilus Harvested from a Copper Roof Inhibit the Growth of Other Microorganisms." American Journal of Undergraduate Research 17, no. 2 (September 30, 2020): 3–11. http://dx.doi.org/10.33697/ajur.2020.016.

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Bacteria growing under the effects of unique selective pressures have distinct adaptations allowing them to survive. Copper surfaces present challenges for bacterial survival because ions dissolve from the surfaces and disrupt cell membranes, thus inhibiting bacterial growth. In this study, the copper roof of Simons Hall in Collegeville, Minnesota was sampled for bacterial species during November 2018. Bacteria were isolated and grown in culture, and zones of inhibition were identified surrounding three of the bacterial colonies. Polymerase chain reaction (PCR) was used to identify two of the bacteria samples as Bacillus cereus and a third sample as Bacillus pumilus. Bacilli are large, rod-shaped, gram-positive bacteria commonly found in diverse environments. They are endospore-forming aerobes or facultative anaerobes. Initial experiments indicated that all three Bacillus strains had the ability to inhibit the growth of three environmental microorganisms. Results from growth curve experiments depicted inhibitory effects on environmental microorganisms at all stages of the growth curve, which is contrary to the prediction that the inhibitory behavior would appear at one specific period of the growth curve. Additional experiments involved plating isolates of Bacillus cereus and Bacillus pumilus with laboratory samples of Pseudomonas aeruginosa, Streptococcus pneumoniae, and Listeria monocytogenes to further understand the effectiveness of B. cereus and B. pumilus at inhibiting the growth of other microorganisms. These findings support previous studies and suggest that Bacillus are capable of inhibiting or killing other organisms. Further research will be conducted to illuminate the inhibitory mechanisms and identify potential therapeutic possibilities. KEYWORDS: Bacteria; Copper; Resistance; Growth Curve; Inhibition; Bacillus; Bacteriocin; Antimicrobial Peptides
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Woeste, Steven, and Paul Demchick. "A slow bacterial growth curve exercise for laboratory classrooms." Journal of Biological Education 30, no. 2 (June 1996): 91–92. http://dx.doi.org/10.1080/00219266.1996.9655484.

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Cao, Yang-Yang, Tetsuya Yomo, and Bei-Wen Ying. "Clustering of Bacterial Growth Dynamics in Response to Growth Media by Dynamic Time Warping." Microorganisms 8, no. 3 (February 26, 2020): 331. http://dx.doi.org/10.3390/microorganisms8030331.

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Bacterial growth curves, representing population dynamics, are still poorly understood. The growth curves are commonly analyzed by model-based theoretical fitting, which is limited to typical S-shape fittings and does not elucidate the dynamics in their entirety. Thus, whether a certain growth condition results in any particular pattern of growth curve remains unclear. To address this question, up-to-date data mining techniques were applied to bacterial growth analysis for the first time. Dynamic time warping (DTW) and derivative DTW (DDTW) were used to compare the similarity among 1015 growth curves of 28 Escherichia coli strains growing in three different media. In the similarity evaluation, agglomerative hierarchical clustering, assessed with four statistic benchmarks, successfully categorized the growth curves into three clusters, roughly corresponding to the three media. Furthermore, a simple benchmark was newly proposed, providing a highly improved accuracy (~99%) in clustering the growth curves corresponding to the growth media. The biologically reasonable categorization of growth curves suggested that DTW and DDTW are applicable for bacterial growth analysis. The bottom-up clustering results indicate that the growth media determine some specific patterns of population dynamics, regardless of genomic variation, and thus have a higher priority of shaping the growth curves than the genomes do.
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Cuevas, Daniel A., and Robert A. Edwards. "PMAnalyzer: a new web interface for bacterial growth curve analysis." Bioinformatics 33, no. 12 (February 13, 2017): 1905–6. http://dx.doi.org/10.1093/bioinformatics/btx084.

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Wajima, Takeaki, Reina Kinugawa, Tetsuya Yamada, Hideaki Ikoshi, and Norihisa Noguchi. "Panax Notoginseng Extract Possesses Significant Antibacterial Activity against Pathogenic Streptococci." Pharmacology 103, no. 5-6 (2019): 221–27. http://dx.doi.org/10.1159/000496830.

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Background: In traditional Chinese medicine, Panax notoginseng is used to treat inflammation and bleeding but has not been shown to affect bacterial pathogens. Objectives: Our aim was to assess the antibacterial potential of Panax notoginseng extract (PNE) against bacterial pathogens. Methods: PNE was dissolved in autoclaved distilled water. Antimicrobial activity was measured by the disc diffusion test and bacterial growth curve assays, in which the concentration of bacterial colony forming units was monitored at several time points in the presence or absence of PNE. Results: Disc diffusion and growth curve assays demonstrated that PNE significantly inhibited the growth of Streptococcus pyogenes, Streptococcus pneumoniae, and Haemophilus influenzae (p < 0.05). In contrast, the growth of the oral commensal bacteria Streptococcus intermedius, Streptococcus salivarius, and Streptococcus anginosus was not inhibited. Therefore, S. pyogenes clinical isolates were analyzed. PNE had antimicrobial effects on all tested isolates in both aerobic and anaerobic conditions. In addition, when S. pyogenes was co-cultured with S. intermedius in the presence of PNE, PNE inhibited the growth of S. pyogenes, but did not inhibit the growth of S. intermedius. Conclusion: Our findings suggested that PNE inhibited S. pyogenes without affecting oral commensal bacteria. Therefore, PNE could be used for the treatment of S. pyogenes infections.
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Dissertations / Theses on the topic "Bacterial growth curve"

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Huff, Karleigh Rose. "Association of foodborne pathogens with Capsicum annuum fruit and evaluation of the fruit for antimicrobial compounds." Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/77213.

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Hot peppers are gaining popularity in the United States as both a vegetable and a spice. In 2008, jalapeño peppers were involved in a multistate outbreak of Salmonella Saintpaul. This is the first outbreak implicating jalapeño as a vehicle for foodborne illness. Hot peppers contain many compounds thought to possess antimicrobial characteristics. This research was conducted to provide more information on the interactions of pathogenic bacteria and jalapeño peppers, as well as to identify properties of Capsicum annuum that affect bacterial survival, growth, and inhibition. Behavior of pathogens associated with jalapeños was investigated by inoculating jalapeño fruits with a cocktail of Listeria monocytogenes, Salmonella enterica, or Escherichia coli O157:H7 on the intact external surface, injured external surface, or intact internal cavity and storing the jalapeños at 7°C or 12°C. Intact external jalapeñosurfaces did not support the growth of the bacteria tested under storage conditions of 7°C. However, L. monocytogenes populations remained detectable throughout the 2 week study. At 7°C, pathogenic bacteria were able to survive but not grow on injured and internally inoculated jalapeño, but populations increased at 12°C (p=0.05). The most supportive growth environment for the pathogenic bacteria was the internal cavity of jalapeño held at 12°C. This study demonstrated the importance of intact uninjured produce and proper storage temperatures for food microbial safety. Inhibitory properties of jalapeños were studied by making extracts from fresh jalapeño peppers to test for antimicrobial activity. A disk diffusion assay determined that the extracts were capable of inhibiting the growth of the pathogenic bacteria tested. Listeria monocytogenes was especially sensitive to the extracts. jalapeño extracts were fractionated using HPLC and used for inhibition assays using disk diffusion and growth curve generation. Two fractions stimulated bacterial growth (p=0.05), while two other fractions inhibited bacterial growth. The inhibitory fractions were separated further using HPLC and tested for antimicrobial activity. Fraction E1 suppressed the growth of L. monocytogenes. HPLC-MS analysis revealed that Fraction E1 contained compounds known as capsianosides. To prove that inhibition is caused by capsianoside(s) and determine minimum inhibitory concentrations, a method to isolate the pure compound should be developed.
Ph. D.
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Han, Yeong-Hwan. "The microaerophilic nature of Wolinella recta, Wolinella curva, Bacteroides ureolyticus, and Bacteroides gracilis." Diss., Virginia Tech, 1991. http://hdl.handle.net/10919/39699.

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Broad relationships among bacteria can be identified by ribosomal RNA analysis, but the resulting groups may not be easily definable by phenotypic characteristics. This is exemplified by the genus Campylobacter, which consists of at least three separate groups that cannot be differentiated readily by phenotypic characteristics. Examination of the type strains of all Campylobacter species (except Campylobacter pylori), Wolinella recta, Wolinella curva, Bacteroides ureolyticus, and Bacteroides gracilis revealed that sheathed flagella occur only in species of rRNA group II (except W.succinogenes). This is helpful in differentiating this group. Campylobacters are microaerophilic: they can respire with oxygen but cannot grow at the full level of oxygen found in an air atmosphere (21% O₂). Although W. recta, W. curva, B. ureolyticus, and B. gracilis are closely related to the campylobacters of rRNA group I, they were thought to be anaerobes, incapable of oxygen-dependent growth and of respiring with O₂. However, the present study revealed that they are in fact microaerophiles. They exhibited oxygen-dependent growth but failed to grow at 21% O₂ and grew only very slightly under anaerobic conditions unless provided with electron acceptors such as fumarate and nitrate. They exhibited 0₂ uptake with H₂ or formate as electron donors (W. recta showed only a low O₂ uptake with H₂). Oxygen uptake was inhibited by KCN and 2-heptyl-4-hydroxyquinoline N-oxide. The organisms possessed membrane bound cytochromes (cytochromes b560 and C551-553, and a CO-binding cytochrome c), as well as soluble cytochrome C552 and CO-binding cytochrome c. The cytochromes were reduced by H₂ and formate as electron donors. Proton efflux from cells in anaerobic suspensions containing H₂ or formate occurred upon addition of a pulse of oxygen. With formate as the electron donor, H+/O ratios of W. curva, W. recta, B. ureolyticus, and B. gracilis were 0.75, 1.66,2.06, and 2.04, respectively. With H₂ as the electron donor, H⁺/O ratios of W.curva, B. ureoyticus, and B. gracilis were 1.25, 1.97, and 2.36, respectively; technical difficulties prevented measurement of the ratio in W. recta. Proton translocation was inhibited by the protonophore carbonylcyanide m-chlorophenylhydrazone. The results confirm the relationship of these organisms to campylobacters.
Ph. D.
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Davis, Carisa Renee. "Pandemic Vibrio parahaemolyticus: Defining Strains Using Molecular Typing and a Growth Advantage at Lower Temperatures." [Tampa, Fla] : University of South Florida, 2008. http://purl.fcla.edu/usf/dc/et/SFE0002531.

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Ferreira, Cristiano Barbalho [UNESP]. "Caracterização fenotípica e funcional de mutantes da bactéria fitopatogênica Xanthomonas citri subsp. citri." Universidade Estadual Paulista (UNESP), 2009. http://hdl.handle.net/11449/92707.

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Made available in DSpace on 2014-06-11T19:26:09Z (GMT). No. of bitstreams: 0 Previous issue date: 2009-11-06Bitstream added on 2014-06-13T20:54:13Z : No. of bitstreams: 1 ferreira_cb_me_jabo.pdf: 3799793 bytes, checksum: f1b3670130a5947eeee6d1e3151f9b69 (MD5)
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Fundecitrus
Dentro da comercialização de frutas, a citricultura é a mais importante. Representa para muitos países, dentre eles, os EUA e o Brasil, uma importante atividade econômica. Porém, esta atividade, vem sofrendo com inúmeras doenças e/ou pragas como a doença do Cancro Cítrico Asiático causada pela bactéria Xanthomonas citri subsp. citri (X. citri). Deste modo, com o objetivo do estudo do genoma funcional da X. citri, um banco de mutantes deste microorganismo foi obtido por meio de inserção aleatória do transposon Tn5, nas quais foram selecionados 53 mutantes que apresentaram, de forma superficial, alterações fenotípica em relação à X. citri selvagem. Para uma avaliação mais precisa, eles passaram por uma nova confirmação de suas alterações fenotípicas, onde foram inoculados em folhas de Citrus sinensis (Laranjeira pêra-Rio) e Citrus limonia (limoeiro cravo) e monitorados durante 16 dias, e aqueles que apresentaram as maiores alterações em relação à selvagem, tiveram confeccionadas para si curvas de crescimento in vivo. Conseguiu-se, desta forma, avaliar quantitativamente o processo patogênico, relacionar seus sintomas com dados numéricos e ainda descobrir detalhes até então não conhecidos. O mapeamento, dos respectivos loci mutados, foi realizado por seqüenciamento de DNA a partir do transposon, demonstrando que a metodologia empregada para a obtenção dos mutantes foi eficiente, conseguiu também revelar diversas proteína ainda hipotéticas, e outras, até então, não considerados como implicados no processo patogênico, como, uma Integrase, Fe-S oxidoredutase, Helicase IV, Receptor Dependente de Ton-B, entre outros
Concerning the commercialization of fruits, the citrus production is the most important. It represents for many countries, amongst them, U.S.A. and Brazil, an important economic activity. However, this activity has been suffering with many illnesses and/or plagues as the illness from the Asiatic citrus canker caused by the Xanthomonas citri subsp. citri bacterium (X. citri). In this way, from a bank of mutants of X. citri, gotten by means of random insertion of commercial one derived from transposon Tn5, had been selected 53 mutants that had presented, of superficial form, some type of phenotype alteration in relation to the wild X. citri. To a more necessary evaluation, each one of them passed for a new confirmation of its phenotype alterations, where they had been inoculated in leafs of Citrus sinensis ('Pera' sweet orange) and Citrus limonia ('Rangpur' lime) and monitored during 16 days, and those that had presented the biggest alterations in relation to the savage, had confectioned for itself in planta growth curves. We obtain, in such a way, to evaluate quantitatively the pathogenic process, to relate its symptoms with numerical data and still to discover not known details until then. The mapping of respective locus mutated was carried through by sequencing of DNA from transposon, demonstrating that the methodology used for the attainment of the mutants was efficient and still to disclose diverse genes still hypothetical, and others, until then, not considered as implied in the pathogenic process, as, Integrase, Fe-S oxidoredutase, Helicase IV, TonB-dependent receptor, among others
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Ferreira, Cristiano Barbalho. "Caracterização fenotípica e funcional de mutantes da bactéria fitopatogênica Xanthomonas citri subsp. citri /." Jaboticabal : [s.n.], 2009. http://hdl.handle.net/11449/92707.

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Resumo: Dentro da comercialização de frutas, a citricultura é a mais importante. Representa para muitos países, dentre eles, os EUA e o Brasil, uma importante atividade econômica. Porém, esta atividade, vem sofrendo com inúmeras doenças e/ou pragas como a doença do Cancro Cítrico Asiático causada pela bactéria Xanthomonas citri subsp. citri (X. citri). Deste modo, com o objetivo do estudo do genoma funcional da X. citri, um banco de mutantes deste microorganismo foi obtido por meio de inserção aleatória do transposon Tn5, nas quais foram selecionados 53 mutantes que apresentaram, de forma superficial, alterações fenotípica em relação à X. citri selvagem. Para uma avaliação mais precisa, eles passaram por uma nova confirmação de suas alterações fenotípicas, onde foram inoculados em folhas de Citrus sinensis (Laranjeira pêra-Rio) e Citrus limonia (limoeiro cravo) e monitorados durante 16 dias, e aqueles que apresentaram as maiores alterações em relação à selvagem, tiveram confeccionadas para si curvas de crescimento in vivo. Conseguiu-se, desta forma, avaliar quantitativamente o processo patogênico, relacionar seus sintomas com dados numéricos e ainda descobrir detalhes até então não conhecidos. O mapeamento, dos respectivos loci mutados, foi realizado por seqüenciamento de DNA a partir do transposon, demonstrando que a metodologia empregada para a obtenção dos mutantes foi eficiente, conseguiu também revelar diversas proteína ainda hipotéticas, e outras, até então, não considerados como implicados no processo patogênico, como, uma Integrase, Fe-S oxidoredutase, Helicase IV, Receptor Dependente de Ton-B, entre outros
Abstract: Concerning the commercialization of fruits, the citrus production is the most important. It represents for many countries, amongst them, U.S.A. and Brazil, an important economic activity. However, this activity has been suffering with many illnesses and/or plagues as the illness from the Asiatic citrus canker caused by the Xanthomonas citri subsp. citri bacterium (X. citri). In this way, from a bank of mutants of X. citri, gotten by means of random insertion of commercial one derived from transposon Tn5, had been selected 53 mutants that had presented, of superficial form, some type of phenotype alteration in relation to the wild X. citri. To a more necessary evaluation, each one of them passed for a new confirmation of its phenotype alterations, where they had been inoculated in leafs of Citrus sinensis ('Pera' sweet orange) and Citrus limonia ('Rangpur' lime) and monitored during 16 days, and those that had presented the biggest alterations in relation to the savage, had confectioned for itself in planta growth curves. We obtain, in such a way, to evaluate quantitatively the pathogenic process, to relate its symptoms with numerical data and still to discover not known details until then. The mapping of respective locus mutated was carried through by sequencing of DNA from transposon, demonstrating that the methodology used for the attainment of the mutants was efficient and still to disclose diverse genes still hypothetical, and others, until then, not considered as implied in the pathogenic process, as, Integrase, Fe-S oxidoredutase, Helicase IV, TonB-dependent receptor, among others
Orientador: Maria Inês Tiraboschi Ferro
Coorientador: Julio Cezar Franco de Oliveira
Banca: Manoel Victor Franco Lemos
Banca: Mariana Carina Frigieri
Mestre
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Book chapters on the topic "Bacterial growth curve"

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Gooch, Jan W. "Standard Bacterial Growth Curve." In Encyclopedic Dictionary of Polymers, 925. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_14857.

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Govantes, Fernando. "Serial Dilution-Based Growth Curves and Growth Curve Synchronization for High-Resolution Time Series of Bacterial Biofilm Growth." In Host-Pathogen Interactions, 159–69. New York, NY: Springer New York, 2017. http://dx.doi.org/10.1007/978-1-4939-7604-1_13.

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Masoodi, Khalid Z., Sameena Maqbool Lone, and Rovidha Saba Rasool. "Growth of bacterial cultures and preparation of growth curve." In Advanced Methods in Molecular Biology and Biotechnology, 163–66. Elsevier, 2021. http://dx.doi.org/10.1016/b978-0-12-824449-4.00030-x.

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Chavasit, Visith, Juntima Photi, Sasiumphai Purttiponthanee, and Piyanuch Saekoo. "Use of Bacterial Growth Curve for Assessing Risk of Microbiological Pathogens in Food Products." In Microbial Contamination and Food Degradation, 341–65. Elsevier, 2018. http://dx.doi.org/10.1016/b978-0-12-811515-2.00011-1.

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DELIGNETTE-MULLER, M. L., and J. P. FLANDROIS. "NEURAL NETWORKS AS AN ALTERNATIVE METHOD FOR PREDICTING BACTERIAL GROWTH RATE FROM THE BEGINNING OF A GROWTH CURVE." In Industrial Applications of Neural Networks, 451–57. WORLD SCIENTIFIC, 1998. http://dx.doi.org/10.1142/9789812816955_0053.

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Fonseca de Moraes, Marcilene, Diana Francisca Adamatti, Albano Oliveira de Borba, Adriano Velasque Werhli, and Andrea von Groll. "Using Probability Distributions in Parameters of Variables at Agent-Based Simulations." In Advances in Computational Intelligence and Robotics, 333–55. IGI Global, 2017. http://dx.doi.org/10.4018/978-1-5225-1756-6.ch014.

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Even treatable and preventable with medication, tuberculosis (TB) continues to infect and cause deaths globally, especially in the poorest countries and in most vulnerable parts of the rich countries. Given this situation, the study of the growth curve of Mycobacterium tuberculosis, which causes tuberculosis, can be a strong ally against TB. This study models the growth curve of Mycobacterium tuberculosis using simulation based agents, aiming to simulate the curve with the minimum possible error when compared to in vitro results. To implement this model, the agents represent the bacteria in their habitat and how they interact with each other and the environment. Some parameters of the agents are modelled with probability distributions.
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Iqbal, Pervaiz, Rubeena Khaliq, and Aadil Rashid Sheergojri. "Mathematical Approach in Colitis-Related Colon Cancer Genomics." In Diagnostic and Treatment Methods for Ulcerative Colitis and Colitis-Associated Cancer, 170–200. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-3580-6.ch008.

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Ulcerative colitis or Crohn's illness patients are in danger of colon cancer due to chronic inflammation, resulting from the reaction of the immune system to bacterial disease caused by genetic alterations in the colonic mucosa. Somatic cells gain genomic changes, such as TP53 that regulates MUC2 production and APC alterations linked with 𝛽-catenin and MUC1 contribution in the slight proliferation of cells. Mathematical modeling describes developmental modifications and uses the phrases to link parameter to curves of age-dependent incidence of epidemiological cancer. By using the long-lasting investigation of IBD patients to gather the genomic estimations for increasingly exact computations of IBD-explicit developmental parameters as initiation, birth, and death. Colon cancer genetic trajectory follows the structure of the composition of functions that leads to malignancies. Models of population level can be utilized to consolidate epidemiological information and in this manner describe malignant growth advancement in a population with IBD.
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Conference papers on the topic "Bacterial growth curve"

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Seggiaro and Valentinuzzi. "Input Amplifier Current Components In The Electrode Interface Impedancimetric Bacterial Growth Curves." In Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE, 1992. http://dx.doi.org/10.1109/iembs.1992.592991.

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Felice, Carmelo J., Virginia N. Seggiaro, and Max E. Valentinuzzi. "Input amplifier current components in the electrode interface impedancimetric bacterial growth curves." In 1992 14th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE, 1992. http://dx.doi.org/10.1109/iembs.1992.5761668.

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Bueltemeier, Hagen, Hakan Alkan, and Moh'd Amro. "A New Modeling Approach to MEOR calibrated by Bacterial Growth and Metabolite Curves." In SPE EOR Conference at Oil and Gas West Asia. Society of Petroleum Engineers, 2014. http://dx.doi.org/10.2118/169668-ms.

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Xu Hou, Xiaofan Ma, Jiangtao Wang, Ping Guo, Yuzhen Ma, Junjia Cui, and Chen Zhang. "The growth curve and the best degradation training time of oil degradation bacterium in the soil." In 2011 International Conference on Remote Sensing, Environment and Transportation Engineering (RSETE). IEEE, 2011. http://dx.doi.org/10.1109/rsete.2011.5965344.

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Men, Hong, Yan Peng, Jing Zhang, Shanrang Yang, and Zhiming Xu. "Study on Biocorrosion Induced by Sulfate-Reducing Bacteria on Heat Exchanger Material in Cooling Water." In 2010 14th International Heat Transfer Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ihtc14-22747.

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Corrosion associated with microorganisms has been recognized for over 50 years and yet the study of microbiologically influenced corrosion (MIC) is relatively new. MIC can occur in diverse environments. Industrial cooling water from rivers, lakes and sea water contain lots of microorganisms which are able to grow and multiply under certain conditions when pH, water temperature and sunlight etc are suitable. MIC is one of key cause of heat exchanger faults. MIC of heat exchanger materials in cooling waters has caused expensive unplanned outages, the need for local repairs and, in some cases, completes system replacement. Sulfate-reducing bacteria (SRB) are the main harmful bacteria in circulating cooling water. Under anaerobic conditions, SRB reproduce a lot to produce mucus, which speed up the formation of corrosion, erode the metal equipment, plug the pipeline, affect the efficiency of heat transfer, and bring a lot of inconvenience to the production. The corrosion behaviors of 304 stainless steel induced by SRB were studied by measuring the polarization curves, electrochemical impedance Spectrum, weight loss measurements of fore-and-aft biocorrosion, and electrochemical noise method. The electrochemical noise signal of 304 stainless steel corrosion were de-noised by using a wavelet threshold de-noising method, which made the quadratic biorthogonal spline wavelet as the mother wavelet and adopted an soft threshold processing function. The result showed that the slope of cathodic polarization curves measured included with SRB is lower than the one obtained without SRB, while the slope of anodic polarization curves is higher than it. It is concluded that the process of anode polarization was repressed at the presence of SRB. With the growth of the culture time, the value of electrochemical impedance without bacteria reduced at first, then rose, while with bacteria fell at all times. It indicated that SRB accelerated the corrosion of stainless steel. With the dipping time, a biofilm, under which corrosion products congregate to form local battery corrosion, was formed on the surface of stainless steel, so that the serious pitting corrosion is induced. The results from electrochemical noise method showed that the quadratic biorthogonal spline wavelet much smoother and it can remove the noise from the electrochemical noise effectively, and can effectively identify the location of the sudden changes in the signal and accurately reflect the useful information of the signal. The more useful information and data about biocorrosion induced by SRB are also gotten.
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6

Ganguli, Rahul, and Vivek Mehrotra. "Bio Inspired Living Skins for Fouling Mitigation." In ASME 2008 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASMEDC, 2008. http://dx.doi.org/10.1115/smasis2008-588.

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A biomimetic method to mitigate marine biofouling using a pilot-whale inspired sacrificial skin concept has been developed. We developed a method to form conformal, protective skins in-situ underwater using a circulatory system. In addition, the materials chemistry was tuned such that the skin dissolves after a tunable stable period, removing any foulants that may have collected on it. A very large reduction in biofouling was demonstrated for surfaces protected by the sacrificial skin compared to identical unprotected surfaces, when high fouling pressure was generated using bacteria in artificial seawater. Skin formation, stability, and dissolution have been studied by forming skins on 6 inch square flat substrates, and curved surfaces. Several different materials and material combinations were tested for their skin-forming ability. Rheology studies were conducted to determine the changes in viscosity of the materials upon exposure to seawater. The materials microstructure and composition was probed before and after seawater exposure. These experiments helped explain the mechanisms by which skin formation and dissolution occurs. Biofouling experiments consisted of culturing and growing the bacteria Pseudoalteromonas carrageenovera, a strain known to cause biofouling in marine environments. Efforts focused on determining experimental conditions necessary to achieve high levels of biofouling growth in the shortest amount of time. Marine-like environments were created in the range of a few hundred milliliters of artificial seawater and scaled to several liters, large enough to contain a 6 inch × 6 inch substrate.
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Perez, Lilyanna, Marjorie Flores, Javier Avalos, L. San Miguel, O. Resto, and L. F. Fonseca. "Comparative study of the growth curves of B. Subtilis, K. Pneumoniae, C. Xerosis, and E. Coli bacteria using nanometric silicon particles as a bacteriological sensor." In Microtechnologies for the New Millennium 2003, edited by Robert Vajtai, Xavier Aymerich, Laszlo B. Kish, and Angel Rubio. SPIE, 2003. http://dx.doi.org/10.1117/12.498129.

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8

Siefert, Nicholas, and Gautam Ashok. "Exergy and Economic Analysis of Two Different Fuel Cell Systems for Generating Electricity at Waste Water Treatment Plants." In ASME 2012 10th International Conference on Fuel Cell Science, Engineering and Technology collocated with the ASME 2012 6th International Conference on Energy Sustainability. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/fuelcell2012-91457.

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Generating electricity at wastewater treatment plants is a promising near-term application of fuel cell systems. The scale of most wastewater treatment plants is such that there is a good match with the scale of today’s fuel cell systems. This paper presents an exergy analysis and an economic comparison between two fuel cell systems that generate electricity at a wastewater treatment plant. The first process integrates an anaerobic digester (AD) with a solid oxide fuel cell (SOFC). The SOFC was modeled using publicly-available data from the tests on the Rolls-Royce pressurized SOFC. The second process has the wastewater sent directly to a microbial fuel cell (MFC). An MFC is an electrochemical cell in which bacteria convert acetate, sugars and/or other chemicals into protons, electrons and carbon dioxide at the anode electrode. The MFC was modeled as a PEM fuel cell as used for vehicle applications, but with a few changes: (a) anaerobic bacteria, such as geobacter, grow directly on the surface of the anode electrode, (b) there is no anode gas diffusion layer (GDL), (c) iron pyrophyrin, rather than platinum, is used as the catalyst material on the anode, in addition to the bacteria, and (d) the Nafion electrolyte is replaced with a bipolar membrane in order to minimize the transfer of non-proton cations, such as Na+, from the anode to the cathode. The rest of the equipment in the MFC is the same as those in commercial vehicle PEM fuel cells in order to use recent DOE cost estimates for PEM fuel cell systems. In both cases, we generated V-i curves of SOFC and MFC-PEM systems from data available on a) PEM & SOFC electrolyte conductivity and b) anode and cathode exchange current densities, including the effect of platinum levels on the cathode exchange current density of PEM fuel cells. A full exergy analysis was conducted for both systems modeled. The power per inlet exergy will be presented as a function of the current density and the pressure of the fuel cell. Using various Department of Eneregy (DOE) cost estimates for fuel cell systems, we perform parametric studies for both the MFC and AD-SOFC systems in order to maximize the internal rate of return on investment (IRR). In the MFC case, we varied the platinum loading on the cathode in order to maximize the IRR, and in the AD-SOFC case, we varied the current density of the SOFC in order to maximize the IRR. Finally, we compare the IRR of the two systems modeled above with the IRR of an anaerobic digester integrated with a piston engine capable of operating on biogas, such as the GE Jenbacher. Using an electricity sale price of $80/MWh, the IRR of the AD-SOFC, the microbial fuel cell and the AD-piston engine were 9%/yr, 10%/yr and 2%/yr, respectively. This economic analysis suggests that further experimental research should be conducted on both the microbial fuel cell and the pressurized SOFC because both systems were able to generate attractive values of IRR at an electricity sale price close to the average industrial price of electricity in the US.
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9

Muraro, Ronald P., Thomas H. Spreen, and Marisa L. Zansler. "Florida’s Citrus Canker Eradication Program: Cost-Benefit Analysis With an Example of an Endemic Citrus Canker Situation for Florida Processed Oranges." In ASME 2006 Citrus Engineering Conference. American Society of Mechanical Engineers, 2006. http://dx.doi.org/10.1115/cec2006-5201.

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The rapid expansion and integration of international trade, increased tourism, and changes in methods of production in recent decades have increased the likelihood of the introduction of invasive species to U.S. agriculture. Invasive species can have adverse environmental and/or economic impacts when introduced to a region. Economic impacts include marketing, production, and trade implications. One such invasive species imposing adverse economic impacts to the Florida citrus industry is a bacterial disease known as citrus canker (Xanthomonas axanopodis pv. citri). Citrus canker causes lesions on the leaves, stems, and fruit of citrus trees. The disease adversely affects the proportion of fruit intended for the fresh market, serves to weaken citrus trees, leads to a reduction in yields, and leads to higher costs of production. Florida’s Citrus Canker Eradication Program (CCEP) was implemented in the mid-1990s in an attempt to establish the guidelines for averting the spread of the disease. Currently there is no available biological or chemical cure for citrus canker. The CCEP instituted a policy of immediate eradication of any tree infected with citrus canker. Based upon the research by Gottwald et al., 2002, the CCEP also stipulated that all trees within a radius of 1900 feet of any infected trees be eradicated. Eradication is mandatory in such situations even if the trees within this radius do not yet show signs of infection. In addition to eradication, the CCEP defined additional regulations such as the decontamination of grove workers, field equipment, and packinghouses with approved chemicals (Chung et al., 2002). In 2004, an economic/benefit-cost analysis of the CCEP was conducted using the predicted values of the benefits and the costs associated with the policy. The actual expenditures of implementation through 2004 were weighed against the projected loss of revenue and the cost savings associated with an industry with pervasive citrus canker in an attempt to assess the net benefits of the policy. In this paper, a summary of the CCEP cost benefit analysis will be discussed. Three segments of Florida’s citrus industry were analyzed separately: 1) processed oranges; 2) fresh and processed grapefruit; and 3) specialty citrus fruit. An example will also be discussed which estimates the cumulative 15-year net grower returns for processed Hamlin and Valencia oranges which compares a no citrus canker situation with four possible endemic citrus canker fruit loss situations that include the additional grower costs to manage citrus canker. Note: The summary discussion presented in this paper on the economic impact of Florida’s citrus canker eradication program (CCEP) was completed in June–July 2004 prior to hurricanes Charley, Frances, and Jeanne, and in 2005 hurricane Wilma spreading citrus canker across Florida’s commercial citrus acreage. Updating economic impact of the CCEP to reflect the impact of the hurricanes is currently being planned. Paper published with permission.
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