PPT-MICROBIAL GROWTH KINETICS

INTRODUCTION GROWTH CURVE LAG PHASE EXPONENTIAL PHASE STATIONARY PHASE DECLINE PHASE INDEX A closed culture system which contains initial and limited amount of nutrients The inoculated culture undergoes 4 phases ie . 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. 1. 19. Copyright © McGraw-Hill Global Education Holdings, LLC. Permission required for reproduction or display.. Introduction to . Microbial . Taxonomy. Taxonomy. science of biological classification. Lecture 8: Tuesday, 9/15/15. Today’s Objective. Kinetics of rectilinear motion. . What is Kinetics?. Kinetics is the study of the relations between unbalanced forces and the resulting changes in . A. Metabolism. 1. Anabolism. A) synthesis reactions (building up). 2. Catabolism. A) lysis reactions (breaking down). B. Enzymes. 1. proteins that facilitate chemical reactions. Microbial Metabolism. THE ORIGIN AND EVOLUTION OF MICROBIAL LIFE. HOW DID LIFE ORIGINATE?. SPONTANEOUS GENERATION. LIFE ARISING FROM NON-LIVING MATTER. LONG BELIEVED AS THE ACCEPTED EXPLANATION OF ORIGINATION OF LIFE. EXPERIMENTS EVENTUALLY SHOWED IT TO BE IMPOSSIBLE. 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. 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. A. Structure of DNA. 1. discovered by James Watson and Francis Crick in 1953. 2. stores genetic information for the production of proteins. 3. composed of nucleotides. A) a nucleotide is composed of a nitrogenous base, sugar, and phosphate. Pratt & . Cornely. . Ch. 7. Enzyme Kinetics. How fast an enzyme catalyzed reaction goes. Why study enzyme kinetics?. Helps us understand mechanism of enzyme (how it works). Investigation of mutations in metabolic pathways. (a) Intrinsic factors: . These. . are inherent in the food. They include:. pH,. . water activity,. . oxidation reduction potential,. . nutrient content,. . antimicrobial contents,. . biological structure. 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. Microbial survival strategies. 2. Microbial growth. 3. Effects of the environment. 4. Microbial cultures. 5. Growth measurements. 6. Antimicrobial agents. 7. Antibiotics. 1. . Microbial. . survival. Scientific opportunities with . als. -U. 1. Damage-free probing of aerosol reactions with <1 . m. s time resolution. Probe with soft x-ray . nanoprobes. , full-field soft x-ray microscopy. Aerosols are submicron compartmentalized chemical reactors. Microbiology. Outline. Microbial growth . in . natural environments. . Measurement . of . microbial population size. Principles of . microbial control. . Physical, chemical and biological control.