Relevant bibliographies by topics / Impedance microbiology

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

Academic literature on the topic 'Impedance microbiology'

Author: Grafiati
Published: 4 June 2021
Last updated: 6 February 2022

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Journal articles on the topic "Impedance microbiology"

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WAWERLA, MONIKA, A. STOLLE, BARBARA SCHALCH, and H. EISGRUBER. "Impedance Microbiology: Applications in Food Hygiene." Journal of Food Protection 62, no. 12 (December 1, 1999): 1488–96. http://dx.doi.org/10.4315/0362-028x-62.12.1488.

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Impedance microbiology is a rapid method that enables qualitative and quantitative tracing of microorganisms by measuring the change in the electrical conductivity. With direct impedance technology, the change in the conductivity of a liquid culture medium serves as a measuring parameter, whereas with indirect impediometry, the change in the electrical conductivity of a reaction solution, which occurs through the absorption of gases from the inoculated bacterial culture, is measured. Most investigations concerning the applicability of impediometry in food microbiology deal with the impedimetric detection or enumeration of Enterobacteriaceae, especially the detection of Salmonella. However, impediometry has been applied to other bacterial groups or species as well. Furthermore, a great number of published findings concern the impedimetric determination of the total bacterial count. The successful application of this fast method on further areas of food hygiene, such as tracing antibiotics and testing additives for their antimicrobiological effect, has also been described. In general the use of impediometry for the application areas stated has been judged positively. However, the time and expense required by the user to optimize the method, the deficits when testing slightly contaminated sample material or determining the bacterial count in those cases in which the microorganisms are sublethally damaged, and the necessity of performing individual calibration for each food category limit the applicability of impediometry.
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Felice, C. J., and M. E. Valentinuzzi. "Medium and interface components in impedance microbiology." IEEE Transactions on Biomedical Engineering 46, no. 12 (1999): 1483–87. http://dx.doi.org/10.1109/10.804577.

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Silley, P., and S. Forsythe. "Impedance microbiology-a rapid change for microbiologists." Journal of Applied Bacteriology 80, no. 3 (March 1996): 233–43. http://dx.doi.org/10.1111/j.1365-2672.1996.tb03215.x.

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KHAYAT, F. A., and G. H. RICHARDSON. "Detection of Abnormal Milk with Impedance Microbiology Instrumentation." Journal of Food Protection 49, no. 7 (July 1, 1986): 519–22. http://dx.doi.org/10.4315/0362-028x-49.7.519.

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Mastitic milk was detected by obtaining conductance measurements using an impedance microbiology Bactomatic 120 SC instrument. Conductance readings separated normal and abnormal milks after 30 min at 25°C when readings differed by more than 2 to 3% and exceeded the variance among instrument module wells. Samples blended from four quarters of a cow indicated milk from one quarter was abnormal if the salt level in the abnormal quarter raised the blend conductivity above that of normal samples and variance among the wells. Either solid or liquid substrates that contained stimulants could be used to accelerate bacterial acid production or reduce impedance detection times and did not affect the ability to detect abnormal milk. However, measurements varied with the volume of sample in the well, suggesting that fixed 1-ml liquid volumes of milk be used. Such volumes would allow detection of abnormal milk and bacterial load on the same sample.
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GLASSMOYER, KIRSTEN E., and SCOTT M. RUSSELL. "Evaluation of a Selective Broth for Detection of Staphylococcus aureus Using Impedance Microbiology." Journal of Food Protection 64, no. 1 (January 1, 2001): 44–50. http://dx.doi.org/10.4315/0362-028x-64.1.44.

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Experiments were conducted to evaluate a selective nutrient broth containing acriflavine and nalidixic acid for detection of Staphylococcus aureus using an impedance microbiological method. Nine species of bacteria, other than S. aureus, were evaluated using the selective broth to determine if these species could be inhibited. A total of 10 ppm of nalidixic acid inhibited the gram-negative species tested, with the exception of Pseudomonas aeruginosa. Similarly, 10 ppm of acriflavine suppressed the Staphylococcus spp. examined; however, S. aureus retained the ability to proliferate. Nutrient broth solution containing 10 ppm of nalidixic acid and 10 ppm of acriflavine (S. aureus impedance broth [SIB]) inhibited multiplication of most of the bacterial species tested and allowed S. aureus to be detected in an average of 16.4 h. Fresh chicken carcass rinses and cooked chicken rinses were inoculated with Escherichia coli and S. aureus and assayed using SIB in conjunction with impedance. Results demonstrated that S. aureus could be detected in less than 11.5 h, although the presence of E. coli decreased detection times. Additionally, impedance assays were conducted using five different poultry products to evaluate the sensitivity of the broth for detecting S. aureus. S. aureus could be detected on poultry products when present at low levels (101 CFU/ml) in less than 24 h. These studies demonstrated that SIB may be used in conjunction with impedance for rapid detection of S. aureus. However, without further modification, this method should not be used for enumeration of S. aureus from samples containing mixed microflora.
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RUSSELL, SCOTT M., DANIEL L. FLETCHER, and NELSON A. COX. "Comparison of Media for Determining Temperature Abuse of Fresh Broiler Carcasses Using Impedance Microbiology." Journal of Food Protection 58, no. 10 (October 1, 1995): 1124–28. http://dx.doi.org/10.4315/0362-028x-58.10.1124.

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Experiments were conducted to determine the ideal medium for detection of temperature abuse of fresh broiler chicken using impedance microbiological techniques. In three separate trials, 15 ready-to-cook broiler chicken carcasses were obtained from the chiller exit of three separate processing plants. Five carcasses were sampled immediately (day 0), 5 carcasses were sampled after temperature abusing at 25°C for 12 h and holding at 3°C for 6 days (temperature abused), and the remaining 5 carcasses were sampled after holding at 3°C for 7 days (day 7 controls). Whole-carcass rinses were diluted by placing 1 ml from each carcass into 9 ml of each of the following media: (1) brain heart infusion broth (BHI), (2) EC broth with 3% added dextrose (ECD), (3) CM medium with 2% added dextrose (CMD), (4) EC broth (EC), and (5) CM medium (CM). The diluted samples were assayed in duplicate at 43°C using impedance microbiological techniques. Once a detection time (DT) was recorded, one ml of the sample was immediately recovered from the module well, diluted to 10−6, 10−7, and 10−8, and spread plated onto plate count agar. Two colonies from each carcass on plates with the highest dilution were randomly selected and identified. Since both gram-positive and gram-negative genera of bacteria were isolated from BHI-cultured carcass rinses and were responsible for changing the impedance of the medium, DTs were variable. EC and ECD media were not suitable for conducting temperature-abuse determinations. Using CMD medium to select for the growth of gram-negative bacteria, specifically E. coli, temperature-abuse determinations were more accurate than using a general medium, such as BHI. CMD appears to be the most effective medium tested to conduct temperature abuse determinations using impedance microbiological techniques.
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SILVA, J. L., C. L. WANG, M. SCRUGGS, P. L. SILVA, and T. KIM. "IMPEDANCE MICROBIOLOGY TO SCREEN VARIOUS ANTIMICROBIALS ON WHOLE AND FILLET CHANNEL CATFISH." Journal of Rapid Methods and Automation in Microbiology 11, no. 2 (October 2003): 153–61. http://dx.doi.org/10.1111/j.1745-4581.2003.tb00037.x.

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Einarsson, Hjorleifur. "Use of Impedance and Optical Density Instruments in Food Microbiology Hjorleifur Einarsson." Journal of AOAC INTERNATIONAL 71, no. 2 (March 1, 1988): 449. http://dx.doi.org/10.1093/jaoac/71.2.449.

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Chang, Tsung Chain, and Ay Huey Huang. "Rapid Differentiation of Fermentative from Nonfermentative Gram-Negative Bacilli in Positive Blood Cultures by an Impedance Method." Journal of Clinical Microbiology 38, no. 10 (2000): 3589–94. http://dx.doi.org/10.1128/jcm.38.10.3589-3594.2000.

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Rapid differentiation of fermentative gram-negative bacilli (fermenters) from nonfermentative gram-negative bacilli (nonfermenters) in positive blood cultures may help physicians to narrow the choice of appropriate antibiotics for empiric treatment. An impedance method for direct differentiation of fermenters from nonfermenters was investigated. The bacterial suspensions (or positive culture broths containing gram-negative bacteria) were inoculated into the module wells of a Bactometer (bioMérieux, Inc., Hazelwood, Mo.) containing 1 ml of Muller-Hinton broth. The inoculated modules were incubated at 35°C, and the change in impedance in each well was continuously monitored. The amount of time required to cause a series of significant deviations from baseline impedance values was defined as the detection time (DT). The percent change of impedance was defined as the change of impedance at the time interval from DT to DT plus 1 h. After testing 857 strains of pure cultures (586 strains of fermenters and 271 strains of nonfermenters), a breakpoint (2.98%) of impedance change was obtained by discriminant analysis. Strains displaying impedance changes of greater than 2.98% were classified as fermenters; the others were classified as nonfermenters. By using this breakpoint, 98.6% (340 of 345) of positive blood cultures containing fermenters and 98% (98 of 100) of positive blood cultures containing nonfermenters were correctly classified. The impedance method was simple, and the results were normally available within 2 to 4 h after direct inoculation of positive blood culture broths.
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Gomez-Sjoberg, R., D. T. Morisette, and R. Bashir. "Impedance microbiology-on-a-chip: microfluidic bioprocessor for rapid detection of bacterial metabolism." Journal of Microelectromechanical Systems 14, no. 4 (August 2005): 829–38. http://dx.doi.org/10.1109/jmems.2005.845444.

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Dissertations / Theses on the topic "Impedance microbiology"

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Khayat, Fahad Ali Abdulghany. "Detection of Abnormal Milk with Impedance Microbiology Instrumentation." DigitalCommons@USU, 1986. https://digitalcommons.usu.edu/etd/5332.

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Mastitic milk was detected by obtaining conductance measurements using an impedance microbiology Bactometer® 120 SC instruments. Conductance readings taken after 30 min at 25'C separated normal and abnormal milks when readings differed by more than 3% from the variance among instrument module wells. Samples blended from four quarters of a cow indicated milk from one quarter was abnormal if the salt level in the abnormal quarter raised the blend conductivity above that of normal samples and variance among the wells. Either solid or liquid substrates that contained bacterial stimulants could be used to accelerate bacterial acid production or to reduce impedance detection times, each without adversely affecting the ability to detect abnormal milk. However, measurements with liquid substrates varied with the volume of sample in the well. Results suggested that a fixed volume of one ml be used. Such a volume would allow simultaneous detection of abnormal milk and bacterial load on the same sample.
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Karimullah, Affar S. "Application of conducting polymer electrodes in cell impedance sensing." Thesis, University of Glasgow, 2012. http://theses.gla.ac.uk/4274/.

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Research in label free methods for biological analysis has brought interesting developments. Cell impedance spectroscopy has been one of the promising outcomes. It allows the measurement of cell proliferation and motility whereby it is possible to study wound healing and cell behavior in vitro. This thesis presents the progress towards an 8-well impedance measurement setup that uses conducting polymers as electrode material in cell impedance spectroscopy. A step by step fabrication of devices with PEDOT:PSS electrodes is described along with the hardware and software, developed and integrated, to perform impedance measurements of cell cultures. Electrochemical analysis was performed for PEDOT:PSS and Au electrodes to compare the two materials for use in cell impedance spectroscopy. PEDOT:PSS electrodes showed lower interfacial impedance and reach electrochemical equilibrium faster than Au electrodes. It was observed through electrochemical impedance analysis that the lower interfacial impedance is due to the low charge transfer resistance of PEDOT:PSS. MDCK cell proliferation experiments were performed using both types of electrode materials to provide a comparative study. The impedance measurement results showed differences between the two materials that led to a different kind of electrical model for the changes measured due to cell proliferation. Curve fitting results to the electrical model provided an understanding of the cell-substrate interactions and the capabilities of cell impedance spectroscopy. The application of cell impedance spectroscopy to human embryonic stem cells was also explored. The impedance changes of pluripotent stem cells during differentiation to trophoblasts were measured and analyzed. Analysis of changes to the phase values in the frequency spectrum show that by measuring the frequency where the phase is minimum, it is possible to distinguish between the two cell types. It provides a new method of using cell impedance spectroscopy to study stem cells behavior in real time and help researchers in the maintaining of stem cell cultures in the lab. Another new application of cell impedance spectroscopy to determine cell types based on the flexibility of the cytoskeleton was also explored. Some preliminary data is presented in the last chapter.
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Fabbri, Marco. "Sviluppo di un sistema per il monitoraggio della concentrazione batterica tramite impedenziometria." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/12848/.

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Conoscere la concentrazione batterica di un campione biologico è di primaria importanza per molti segmenti di mercato come l'industria biomedicale, militare , ma anche l'industria alimentare e per il controllo ambientale. L'obiettivo della tesi è lo sviluppo di un dispositivo per il monitoraggio della concentrazione batterica basato sulla variazione di conducibilità della soluzione nel tempo, dovuto all'accumulo di ioni nella soluzione in cui sono presenti i batteri. Questa tecnica prende il nome di Impedance Microbiology e presenta una serie di vantaggi rispetto alle tecniche tradizionali in termini di tempo e di denaro. La tecnica di Impedance Microbiology promette di essere più veloce della SPC, portando il tempo di analisi da 24-72 ore ad approssimativamente 12 ore. Questa tecnica inoltre ha il vantaggio di poter essere automatizzata e di non necessitare di personale qualificato, riducendo sensibilmente i costi di analisi. In questa tesi verrà quindi sviluppato il dispositivo che permetterà di svolgere le analisi di Impedance Microbiology e verrà testato in laboratorio per valutarne il funzionamento.
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Duriez, Christophe. "Impedance-metrie en controle alimentaire : etude critique (doctorat : microbiologie)." Lille 2, 1998. http://www.theses.fr/1998LIL2P264.

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Chen, Yajie. "Microbiologically influenced corrosion of carbon steel caused by a sulfate reducing bacterium." University of Akron / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=akron1468357213.

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Book chapters on the topic "Impedance microbiology"

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Paredes, Jacobo, Imanol Tubía, and Sergio Arana. "Biofilm impedance monitoring." In Handbook of Online and Near-real-time Methods in Microbiology, 102–36. Boca Raton, FL : Taylor & Francis Group, 2017.: CRC Press, 2017. http://dx.doi.org/10.1201/9781315153568-6.

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Morello, J. A. "The Use of Microcalorimetry and Impedance in Clinical Microbiology." In Rapid Methods and Automation in Microbiology and Immunology, 207–14. Berlin, Heidelberg: Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/978-3-642-69943-6_27.

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Bolton, F. J. "Conductance and Impedance Methods for Detecting Pathogens." In Rapid Methods and Automation in Microbiology and Immunology, 176–81. Berlin, Heidelberg: Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/978-3-642-76603-9_21.

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Firstenberg-Eden, R. "Electrical Impedance Method for Determining Microbial Quality of Foods." In Rapid Methods and Automation in Microbiology and Immunology, 679–87. Berlin, Heidelberg: Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/978-3-642-69943-6_83.

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Mortari, Alessia, Leandro Lorenzelli, Marco Nicolò, Salvatore Guglielmino, and Laura Maria De Plano. "Progress Toward the Development of a Lytic Bacteriophages-Based Impedance Microbiology for Agro-Food Application." In Lecture Notes in Electrical Engineering, 83–87. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-09617-9_15.

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"Measurement of Microbial Activity by Impedance." In Food Microbiology and Analytical Methods, 321–30. CRC Press, 1997. http://dx.doi.org/10.1201/9781482269833-18.

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Flint, S., A. Naila, and R. Bashir. "Impedance microbiology and microbial screening strategy for detecting pathogens in food." In High Throughput Screening for Food Safety Assessment, 285–300. Elsevier, 2015. http://dx.doi.org/10.1016/b978-0-85709-801-6.00012-5.

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Herrera Hernández, Héctor, Adriana M. Ruiz Reynoso, Juan C. Trinidad González, Carlos O. González Morán, José G. Miranda Hernández, Araceli Mandujano Ruiz, Jorge Morales Hernández, and Ricardo Orozco Cruz. "Electrochemical Impedance Spectroscopy (EIS): A Review Study of Basic Aspects of the Corrosion Mechanism Applied to Steels." In Electrochemical Impedance Spectroscopy. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.94470.

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AC impedance measurements have been applied for over twenty years in electrochemistry and physics to investigate the electrical properties of conductive materials and their interfaces using an external electrical impulse (VOLTAGE, V or CURRENT, I) as driving force. Furthermore, its application has recently appeared to be destined in the Biotechnology field as an effective tool for rapid microbiologic diagnosis of living organism in situ. However, there is no doubt that the electrochemical impedance spectroscopy (EIS) is still one of the most useful techniques around the world for metal corrosion control and its monitoring. Corrosion has long been recognized as one of the most expensive stumbling blocks that concern many industries and government agencies, because it is a steel destructive phenomenon that occurs due to the chemical interaction with aqueous environments and takes place at the interface between metal and electrolyte producing an electrical charge transfer or ion diffusion process. Consequently, it is experimentally possible to determine through the EIS technique the mechanism and control that kinectics of corrosion reactions encounter. First, EIS data is collected through a potentiostat/galvanostat apparatus. After, it is fitted to a mathematical model (i.e. an equivalent electrical circuit, EEC) for its interpretation and analysis, fundamentally seeking a meaningful physical interpretation. Finally, this review reports some basic aspects of the corrosion mechanism applied to steels through the experimental EIS response using Nyquist or Bode plots. Examples are given for different applied electrochemical impedance cases in which steel is under study intentionally exposed to a corrosive aqueous solution by applying a sinusoidal potential at various test conditions.
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Conference papers on the topic "Impedance microbiology"

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Balbin, Jessie R., Ernesto M. Vergara, Kzandra H. Katigbak, Bradly L. Lomotan, Areej Gabrielle R. Rollon, and Hazel Wynne D. Tangonan. "Escherichia coli and Enterococcus faecalis growth detection device in ice using impedance microbiology and image processing technique." In Third International Workshop on Pattern Recognition, edited by Xudong Jiang, Guojian Chen, and Zhenxiang Chen. SPIE, 2018. http://dx.doi.org/10.1117/12.2501998.

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