BIOLOGY 2250 MICROBIAL GROWTH and ITS CONTROL. BIOLOGY 2250 PART 1. MICROBIAL GROWTH.

Slides:



Advertisements
Similar presentations
CONTROL OF MICROBIAL GROWTH
Advertisements

Control of Microbial Growth
Microbial Growth For microorganisms, growth is measured by increase in cell number, due to their limited increase in cell size.
Chapter 7: The _______ of Microbial Growth Microorganisms and Microbial Growth Figure 7.11.
Microbial Control - Physical Means
Microbial Growth.
Medical Technology Department, Faculty of Science, Islamic University-Gaza MB M ICRO B IOLOGY Dr. Abdelraouf A. Elmanama Ph. D Microbiology 2008 Chapter.
Microbial Growth Chapter 6.
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings PowerPoint ® Lecture Slide Presentation prepared by Christine L. Case Microbiology.
Control of microbial growth Some terms to start with.
Microbial Growth. Growth of Microbes Increase in number of cells, not cell size One cell becomes colony of millions of cells.
**Microbial Growth** Growth= an increase in the number of cells, not an increase in size Generation=growth by binary fission Generation time=time it takes.
PHT351 Sterile Dosage Form.
GROWTH OF MICROORGANISMS. Nutritional Classification Based upon energy and carbon sources Energy source- electron donors –Phototrophs (light nourishment)
Sterilization and disinfections By: Microbiology members
Inhibiting Microbial Growth in vitro CLS 212: Medical Microbiology.
PHYSICAL METHODS FOR KILLING MICROBES
Microbial Growth Microbiology. Microbial Growth 0 In microbiology growth is defined as an increase in the number of cells. 0 Knowledge of how microbial.
BIO 205 – Microbiology Chapters 8, 9, end of Ch. 3.
Microbiology B.E Pruitt & Jane J. Stein AN INTRODUCTION EIGHTH EDITION TORTORA FUNKE CASE Chapter 7 The Control of Microbial Growth.
Controlling Microbial Growth in the Environment
The Control of Microbial Growth
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings PowerPoint ® Lecture Slide Presentation prepared by Christine L. Case M I C R.
Physical and Chemical Control of Microorganisms
Control of Bacterial Growth l Definitions –Sterilization - Processes that kills living organisms including spores –Disinfection - Destruction of vegetative.
Unit 3 Control!.
Lecture: Chapter 6 (Microbial Growth) Exercise 9: Aseptic Technique
Chapter 6 – Microbial Growth $100 $200 $300 $400 $500 $100$100$100 $200 $300 $400 $500 Physical Requirements Chemical Requirements Growth of Bacterial.
Chapter 6: Microbial Growth. Requirements for Growth Physical Requirements –Temperature –pH –Osmotic Pressure Chemical Requirements –Carbon –Nitrogen,Sulfur,
1 GROWTH AND CULTURING OF BACTERIA CHAPTER 6. 2 Growth and Cell Division Growth Binary fission.
Microbial Growth Binary Fission Growth Rate Generation Time E. coli can double every 20 minutes Many Bacteria have hr Generation Times.
Microbial Growth & Control of Microbial Growth $100 $200 $300 $400 $500 $100$100$100 $200 $300 $400 $500 Physical Requirements for Growth Chemical Requirements.
Muhammad Suleman Kamran Rasool Fatima Amjad Aysha Imtiaz.
Microbial Growth 1.
Control of Microorganisms Control of Microbial Growth Effected in two basic ways: 1.By Killing Microorganisms 2.By inhibiting the Growth of Microorganisms.
Control of Microbial Growth How to kill them once you grow them.
Microbial Growth Chapter 4.
Control of Microbial Growth. A few terms Bacteriostatic: inhibits bacterial growth Bactericidal: something capable of killing bacteria Antiseptic: an.
Lectures prepared by Christine L. Case
بسم الله الرحمن الرحيم بسم الله الرحمن الرحيم GROWTH AND NUTRITION OF BACTERIA Prof. Khalifa Sifaw Ghenghesh Dept. of Medical Microbiology, Faculty of.
Microbial growth Microbial growth indicates “an increase in a population (number) of microbes, and not the size of a microbe”. Eukaryotes growth Eukaryotes.
Microbial Growth Growth= an increase in the number of cells, not an increase in size Generation=growth by binary fission Generation time=time it takes.
Microbial Growth Growth= an increase in the number of cells, not an increase in size Generation=growth by binary fission Generation time=time it takes.
Chapter 6: Microbial Growth. How do bacteria grow?  Not in size  Increase in population size  One cell divides into 2 new cells – binary fission.
The Control of Microbial Growth
CONTROL OF MICROORGANISMS 1. TOPICS  Sterilization & Disinfection.  Antimicrobial definitions.  Factors influence the effectiveness of antimicrobial.
Dr Rita Oladele Dept of Med Micro &Para CMUL/LUTH
Control of Microorganisms. Scientific Control Louis Pasteur Joseph Lister: 1) hand washing 2) aseptic surgery techniques What are the implications for.
1 Growth and Cell Division Growth: –Not size, but number of cells Bacteria: –Binary fission Yeast: –Budding.
Microbial Growth and The Control of Microbial Growth Microbiology.
Physical methods Heat Moist Heat Dry Heat Radiation Ionized radiati on,e.g. X-ray, Gamma Ray Nonionized radiation, e.g. UV.
Sterilization Lab 3 Abeer Saati.
Factors affect growth of bacteria
Microbial Growth refers to increase in number of cells not in size.
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings PowerPoint ® Lecture Slide Presentation prepared by Christine L. Case M I C R.
Culturing Microorganisms
Bacterial Nutrition, Metabolism and growth
Microbial Growth Binary Fission Growth Rate Generation Time
STERILIZATION AND DISINFECTION
Chapter 6 Microbial Growth.
Physical & chemical Factors
The Control of Microbial Growth
Growth and Cell Division
The Control of Microbial Growth
The Control of Microbial Growth
Chapter 9 Controlling Microorganisms
Culture Techniques Strain - a microbial culture which is the descendent of a single cell originally isolated from the environment Aseptic Technique- method.
Unit 3 Control!.
Chapter 6, part A Microbial Growth.
Review Chapter 5 Review homework assignment.
Presentation transcript:

BIOLOGY 2250 MICROBIAL GROWTH and ITS CONTROL

BIOLOGY 2250 PART 1. MICROBIAL GROWTH

Requirements for Growth Physical Requirements – Temperature, pH, Osmotic Pressure Chemical Requirements – Carbon, Nitrogen, Sulfur, Phosphorous, Trace Elements, Oxygen, Organic Growth Factors

Temperature Requirements Mesophiles Psychrophiles Psychotrophs Thermophiles Hyperthermophiles

TEMPERATURE OF FOODS

OSMOTIC PRESSURE

OXYGEN REQUIREMENTS

BINARY FISSION Little increase in size Growth in numbers to form colonies on an agar plate

How about these numbers!

BACTERIAL GROWTH

GROWTH PHASES

BIOLOGY 2250 PART 2. CONTROL OF MICROBES

TERMINOLOGY

MICROBIAL DEATH

Types of Cell Damage Alterations of Plasma Membrane Damage to Proteins and Nucleic Acids

PHYSICAL METHODS OF CONTROL Moist heat Dry heat Filtration High pressure Desiccation Osmotic pressure radiation

Moist Heat Autoclave

Principle of Autoclave Adjust your recipe to your altitude!

Dry Heat Oven Bunsen burner flame

FILTRATION Membrane filters have different pore sizes, e.g µ’s

High Pressures Fruit Juices

Desicattion Freeze Dried Foods Dried Meats Dried Fruits

Osmotic Pressure Salting – Pickling -

RADIATION Ionizing – cobalt, gamma rays Nonionizing – UV light Microwave

CHEMICAL CONTROL

Feedback: Privacy Policy Feedback
Do Not Sell My Personal Information
About project: SlidePlayer Terms of Service

© 2025 SlidePlayer.com. Inc. All rights reserved.