PPT-Microbial Growth

A Microbial Reproduction 1 binary transverse fission A parent cell enlarges and duplicates all its genetic material B DNA copies move to opposite ends of parent and attach to a section of the cell membrane as it begins to pinch together at the center. Updated: January 2015. By Jerald D. . H. endrix. Microbial Classification . and Taxonomy. Classification Systems. Levels of Classification. Definition of “Species”. Nomenclature. Useful Properties in Microbial Classification. corticosterone. Two microbe strains were more commonly found in nests gathered at the rural site.. . Background. Discussion. Results. Methods. Acknowledgements. Correlations between nest commensal species, nestling health and hormones in the Eastern bluebird, . Samodha Fernando. Department of Animal Science. University of Nebraska-Lincoln. Gut Microbes. Kinross . et al.. . Genome Medicine. 2011 3:14  . www.genome.gov.  . Influence of gut microbiome on obesity. Eric J. Raes, P.E. ., LSRP. Engineering and Land Planning . Dora Ogles, Brett Baldwin, Kate Clark & . Anita Biernacki. Microbial Insights Inc.. Kerry Sublette, Ph.D., Kate Key. University of Tulsa. D. ynamics on Fermentation . P. rogression. RAVE 2015. Linda F. Bisson. Department of Viticulture and Enology. University of California, Davis. Causes of Fermentation Arrest. Nutrient limitation. Nutrient imbalance. Ignaz. . Semmelweis. and Joseph Lister developed the first microbial control methods.. Mid 1800s. Before aseptic surgical techniques ~10% of all deaths were due to nosocomial infections. Delivering mothers as high as 25% death rate. Dr.. P. . Fandamu. Chief Veterinary Research Officer. Presentation outline. Background. Objective of the programme. Materials and Method. Preliminary results. Conclusion. Background. An important aspect food safety (animal derived food) is the control of residues. Updated: January 2015. By Jerald D. . H. endrix. Microbial Classification . and Taxonomy. Classification Systems. Levels of Classification. Definition of “Species”. Nomenclature. Useful Properties in Microbial Classification. Microbiology. Microbial Growth. Microbial requirements for growth:. 1. . Physical. A. . Temperature. Optimal growth temperature. Permissible range. human pathogens optimal = . 37°C. Microbial Growth. (a) Intrinsic factors: . These. . are inherent in the food. They include:. pH,. . water activity,. . oxidation reduction potential,. . nutrient content,. . antimicrobial contents,. . biological structure. Musafer. PhD. Microbial growth defined as an increase in cellular constituents resulting an increase in a microorganism size, population number or both.. 1-Lag phase. When M.O are inoculated into fresh culture medium, will not reproduce immediately, therefore this period is called the lag phase. . Growth: . A. n . increase in cell number, not in cell size. .. Bacteria . grow and divide by binary fission, a rapid and relatively simple process. .. Phases . of Growth Bacterial Growth Curve : . When . 1. Temperature. 2. . PH. 3. . Water activity. 4. . Oxygen and redox. Temperature. Minimum Temperature. . The temperature below which no growth occurs.. At temperature below the minimum the properties of cell membranes change so that they can no longer transport materials into the cell. 9. Figure 9.1 A plot of microbial death rate.. Constant percentage. of the extant population. is killed each minute. Basic Principles of Microbial Control. Action of Antimicrobial Agents. Alteration of cell walls and membranes.