remote sensing in archaeology - intergraph
TRANSCRIPT
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MICROBIAL PROCESSING
BIOTECHNOLOGY
Dr Roshini Govinden
UKZN – Dept Microbiology
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PRE-REQUISITEMICR 213rDNA202
AIMSTo introduce key concepts and applications in microbial processing
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Range and scope of microbial processing
Growth of microbes in a controlled environment:
Nutrient requirements
Kinetics
Environmental parameters
Monitoring
Batch and continuous processes
Aspects of upstream and downstream processing
Examples of major fermentation processes
Current trends and applications in industrial biotechnology
Regulatory, safety (HACCP) and socioeconomic considerations ofbiotechnology
CONTENTS
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To describe the applications of microbes in industry
To describe the design of bioreactors for different applications
To design media, growth conditions and techniques for producing andrecovering different types of products of commercial value
To recognize how to screen for, preserve and propagate important genotypes
To compare and contrast between different fermentation processes
To apply kinetic formula to determine growth and productivity parameters ofbatch and continuous fermentations
To describe the role of recombinant DNA technology in industrialbiotechnology
Learning Objectives
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To construct a HACCP plan
To describe the use of microbial cells and enzymes in immobilized forms
To be familiar with several industrial production processes involving microbes
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Practicals
Isolation of antibiotic and enzyme producing strains
Downstream processing techniques
Production of yeast biomass in batch culture & batch culture kinetics
Production of food via fermentation techniques - yogurt, beer
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4 theory lectures per week – including one tutorial every fortnight
1 practical per week
Assignment
Self Study
Attendance will be monitored for all lectures and tutorials
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DP Requirement
40% Class Mark
80% attendance at practicals
Assessment
Class Mark (40%)Theory tests 20% x 2 = 40%
Assignment 10% x 1 = 10%
Practical Reports 15%
Pre-pract quizzes 5%
Practical Tests 15% x 2 = 30%
Total 100%
3 hour exam (60%)
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TEST DATES
THEORY TESTS
2 September 2014
30 September 2014
PRACTICAL TESTS
19 August 2014
7 October 2014
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LECTURER
Dr R Govinden
Room F3 03 018
Consultation Times
Monday: 8H30-10H00
Wednesday: 8H30-10H00
LABORATORY TECHNICIAN
Ms B Mbatha
TUTORS
Ms A Arjoon
Ms R Singarum
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• Microbial Processing: use of microbes and/or their
enzymes to produce products useful to industry
• Biotechnology is ….the manipulation of living
organisms or their constituents, particularly at the
molecular genetic level, to form products useful to
industry
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What is Biotechnology?
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How does it work?
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Multidisciplinary•Biology
•Microbiology
•Biochemistry
•Molecular biology
•Genetics
•Chemistry
• Engineering
Traditional biotechnology:
conventional techniques
used for many centuries to
produce beer, wine, cheese
etc.
“New” biotechnology: all
methods of genetic
modification by
recombinant DNA
technology and modern
developments of
“traditional” biotechnology
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Time line of Biotechnology
• 10 000-8000 BC
– Humans domesticate crops and livestock.
– Potatoes first cultivated for food.
– Wine was known in the Near East by the time
of the book of Genesis (10 000 BC)
• 6000-4000 BC
– Sumerians and Babylonians were drinking beer by 6 000 BC
– Yeast first used to leaven bread by 4 000 BC (Egypt)
– Production of cheese and fermentation of wine (Sumeria, China & Egypt)
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• 4000 BC— 2000 BC
– Babylonians control date palm breeding by selectively pollinating female
trees with pollen from certain male trees.
• 500 BC
– First antibiotic: mouldy soybean curds used to treat boils (China)
• 1322
– An Arab chieftain first uses artificial insemination to produce superior horses
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• 1590
• Janssen invents the microscope.
• 1663
• Hooke discovers existence of the cell.
• 1675
- Leeuwenhoek discovers bacteria.
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• 1797
- Jenner inoculates a child with a viral vaccine to
protect him from smallpox.
• 1830 – 1833
- 1830 — Proteins discovered.
- 1833 — First enzyme discovered and isolated.
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• 1857
• Pasteur proposes microbes cause fermentation.
• Demonstrated the fermentative ability of
microorganisms 1857 and 1876 – the father of
biotechnology.
• 1859
• Charles Darwin publishes the theory of evolution by
natural selection.
• The concept of carefully selecting parents and culling the
variable progeny greatly influences plant and animal
breeders in the late 1800s despite their ignorance of
genetics.
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• Modern fermentation industry owes its existence to the First
World War (1914-1918).
– Glycerol : manufacture of explosives.
• byproduct of soap manufacture from the First World
War
• yeast to produce glycerol by fermentation of sugar
• Neuberg’s Method
• advantage of simultaneous production of alcoholic
substances for industrial use.
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Industrial microbiology - result of empirical developments in the
production of wine, vinegar, beer and sake, and with the
traditional fungal fermentations used in Asia and Africa for the
production of food.
experimental approach to the production of microbial
metabolites only began at the beginning of the 20th century.
Up until the time of World War II, the main microbial products
that had developed from this experimental approach were
enzymes such as proteases, amylases and invertase.
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• breakthrough in biochemical and microbial engineering-after
World War II - large-scale production of the first antibiotic,
penicillin.
• engineering developments
• techniques for large-scale sterilization, aeration & growth of
microorganisms.
• genetic methods - microbial strain improvement
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Introduction of sterility to biotechnological processes:
1940s, complicated engineering techniques were applied to the mass cultivation of microorganisms to exclude contaminating microorganisms, for production of
antibiotics
amino acids
organic acids
enzymes, steroids
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• 1942• The electron microscope used to identify and characterize
a bacteriophage
• Penicillin mass-produced in microbes.
• 1944• DNA is proven to carry genetic information — Avery et
al.
• Waksman isolates streptomycin, an effective antibiotic
for tuberculosis.
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• 1953
– The scientific journal Nature publishes James Watson and
Francis Crick's manuscript describing the double helical
structure of DNA, which marks the beginning of the modern
era of genetics.
• From World War II up until about 1960
– Major new biotechnology products were antibiotics.
• numerous new antibiotics were discovered
• 20 were put into commercial production
– chemical transformation of steroids.
– culture of animal cells for the production of virus vaccines
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• 1960 -1975
– in Japan, new microbial processes for the production of flavour
enhancers
• amino acids
• 5’-nucleosides
– Processes for enzyme production for industrial, analytic and
medical purposes were perfected.
– During this same period, successful techniques for the
immobilization of enzymes and cells were developed.
• 1972
– The DNA composition of humans is discovered to be 99
percent similar to that of chimpanzees and gorillas.
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continuous fermentation
production of Single-Cell Protein (SCP) from yeast and
bacteria for use as human and animal food.
SCP processes were developed using microorganisms capable
of using petroleum-based starting materials such as gas oil,
alkanes, and methanol.
microbial biopolymers such as xanthan and dextran, used as food
additives, were also developed into commercial processes.
use of microorganisms for tertiary oil recovery (an aspect of geo-
microbiology)
perfection of techniques for anaerobic cultivation of
microorganisms - derived out of studies on the sewage treatment
process.
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• 1975 –
– development of the hybridoma technique, for the production
of monoclonal antibodies
• 1977
– First expression of human gene in bacteria - E. coli.
• 1978
• Recombinant human insulin first produced.
• 1980
– The U.S. Supreme Court, in the landmark case , approves the
principle of patenting recombinant life forms, which allows the
Exxon oil company to patent an oil-eating microorganism
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• 1982
– The first product, human insulin, was soon followed by Factor
VIII, human growth hormone, interferons and urokinase.
• 1983
– The polymerase chain reaction (PCR) technique is conceived.
PCR, which uses heat and enzymes to make unlimited copies of
genes and gene fragments, later becomes a major tool in biotech
research and product development worldwide.
– The first genetic transformation of plant cells by Ti plasmids is
performed.
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• 1990
– The first experimental gene therapy treatment is performed
successfully on a 4-year-old girl suffering from an immune
disorder.
– The first transgenic dairy cow - used to produce human milk
proteins for infant formula - is created.
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• 1994
– First FDA approval for a whole food produced
through biotechnology: FLAVRSAVR™ tomato.
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The birth of a lamb (Dolly) cloned by nuclear transfer using an
mammary cell from an adult sheep as nucleus donor and
an enucleate ovum as recipient.
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1998
– A rough draft of the human genome map is produced, showing the locations of more than 30,000 genes.
2000
– First complete map of a plant genome developed: Arabidopsis thaliana.
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• containing a fluorescent
marker gene from a jellyfish.
• 224 eggs were injected with
the gene.
• yielded 40 viable embryos
on fertilization
• 5 pregnancies resulted.
• 3 monkeys born live
• only ANDi carries the gene,
although it is not being
expressed.
Birth of first genetically
modified primate, a rhesus
monkey named ANDi
(inserted DNA backwards)
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DIFFERENT ASPECTS OF MICROBIOLOGY
• Industrial Microbiology
• Food Microbiology
• Environmental Microbiology
• Medical Microbiology
• Pharmaceutical Microbiology
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INDUSTRIAL MICROBIOLOGY
Industrial Application of Microbiology &
Biotechnology
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INDUSTRIAL
• AMINO ACID PRODUCTION
• ANTIBIOTIC PRODUCTION
• ALCOHOL PRODUCTION
• DETERGENT PRODUCTION
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Microbes are
used in the
production of
vaccines and
antibiotics e.g.
Penicillin from
Penicillium sp
HEALTH CARE PRODUCTS
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Antibiotics Against PathogensAntibiotics Against
Pathogens
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Some important fermentation products
Product Organism Use
Ethanol Saccharomyces
cerevisiae
Industrial solvents,
beverages
Glycerol Saccharomyces
cerevisiae
Production of
explosives
Lactic acid Lactobacillus
bulgaricus
Food and
pharmaceutical
Acetone and
butanol
Clostridium
acetobutylicum
Solvents
-amylase Bacillus subtilis Starch hydrolysis
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Some important fermentation products
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FOOD AND DRINK
•MANUFACTURE• Cheese
• Yoghurt
• Wine
• Beer
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FOOD PRODUCTS
AND MICROBIOLOGY
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The yeast S.cerevisiae
used in bread making
and beer brewing
FOOD AND BEVERAGES
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Fungi in cheese
making e.g. Penicillium
camembertii
Edible fungi e.g.
Agaricus sp.
(mushrooms)
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INDUSTRIALLY IMPORTANT MICROBIAL
METABOLITES
• CITRIC ACID PRODUCTION – soft
drinks
• PLANT HORMONES –
GIBBERELLINS – AGRICULTURAL
INDUSTRY
• VITAMINS – RIBOFLAVIN
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INDUSTRIALLY IMPORTANT
MICROBIAL ENZYMES
Bread making and confectionary
Dairy industry
Detergents
Cosmetic industry
Glucose syrup production
Improving quality and flavour of
food
Pulp and paper industry
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AGRICULTURAL APPLICATIONS
FERTILIZER WASTEWATER TREATMENT
PROCESSES
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Industrial Manufacturing Processes
• biotechnology offers us many options for minimizing the
environmental impact of manufacturing processes
• by decreasing energy use
• and replacing harsh chemicals with biodegradable
molecules produced by living things.
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Renewable Energy
• Fossil fuels are nonrenewable.
• Gradual move toward a biobased economy in which agricultural
operations will be the energy and natural resource fields of
tomorrow.
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ENVIRONMENTAL
Water testing and purification processes
Wastewater treatment processes
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Environmental Microbiology
Bioremediation
Bio-leaching
Bio-mining
Microbial – enhanced oil recovery and petroleum upgrading
Mineral and Energy Recovery
Biofuel, Bioethanol and Biomass Production
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BIOTECHNOLOGY TECHNIQUES
• Fermentation
• Cell Fusion
• Cell/tissue Culture
• Genetic Engineering
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Fermentation:
Technique that requires bioreactors - allow a biological process to
take place under optimum conditions, producing a useful compound
in large amounts.
Simple bioreactors have been used to produce beer and wine.
Some bioreactors carry out a chemical process without using living
cells
enzymes are used to trigger conversion of one chemical into another by a
process called biotransformation.
corn syrup and vitamin C
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Cell Fusion:
combining two cells to make a single cell that contains the
genetic material of the original cells.
create new plants by fusing cells from species that do not
naturally hybridise and then generating new plants from the
fused cells.
Pomato (potato/tomato), rutabaga (turnip/wild cabbage),
brokali (brocolli/kale), aprium (plum/apricot), loganberry
(blackberry/red raspberry), lemato (lemon/tomato)
also used to make fused cells known as monoclonal antibodies,
- protective proteins produced by a clone of a single cell.
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Liposomes:
• used as vehicles for delivering certain drugs to the target
tissues of the body.
• Drugs are encapsulated in liposomes - protection against
digestive enzymes in the stomach.
• Liposomes are microscopic spherical particles that are formed
when lipids form a suspension in the water.
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Cell and Tissue Culture:
• growth of living cells or organisms outside the body in a
suitable culture medium which provides nutrients to the
growing cells.
• Individual cells grow and divide in a sterile medium.
• used extensively in laboratories, e.g., cancer research, plant
breeding and for routine analysis of chromosome karyotypes.
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Genetic Engineering:
technology requiring rDNA technology and gene transfer
techniques to bring about a change in the genetic constitution
of the organism to express desired traits.
Previously animal and plant breeders employed classical
breeding methods to improve
produced economically important plants, cows, horses, dogs
Techniques for isolating and altering genes were developed by
geneticists in the US in the 1970s by manipulating the genome
of bacteria.