Pasteur''s experiment, Biology

Assignment Help:

Louis Pasteur (1860-1862) French):

Even after the experiments of Spallanzani, the conflict of a biogenesis and biogenesis continued well into the middle of 19th century till Louis Pasteur famous for Germ Theory of Disease and Immunology finally disproved a biogenesis and proved biogenesis. He kept the sterilized syrup of an infusion of yeast and sugar in flasks and observed that a rich bacterial growth appeared in the syrup if it was exposed to air pollution. But no bacteria growth appeared in the flasks were either kept airtight of only purified air was allowed into them. How could Pasteur get pure air? For this he used a simple, but ingenious device, he heated the necks of some of his flasks and drew these into long shaped open tubes  When air entered  into these flasks, all  air borne particles, including spores, germs etc. Got  stuck at the bends of the tubes, so  that only pure air reached the syrup. Hence, the syrup remained sterile. This conclusively proved that even micro organisms never form spontaneously upon present earth. 

1395_pasteurs experiment.jpg


Related Discussions:- Pasteur''s experiment

Explain posaconazole, Posaconazole  Posaconazole (SCH 56592), an unappr...

Posaconazole  Posaconazole (SCH 56592), an unapproved azole available from the manufacturer for compassionate use, isunder review by the FDA for oral treatment of invasive fung

Basic structure of heart, Basic Structure of Heart The heart is small...

Basic Structure of Heart The heart is small organ about the size of one's fist, located in the middle and slightly to the left of the mediastinum in the chest. The wider t

Water absorption and transpiration, Water Absorption and Transpiration ...

Water Absorption and Transpiration The rate of water absorption is controlled by the rate of transpiration. A high water potential in the atmosphere would reduce water loss fr

What is double labelled water (dlw), What is Double Labelled Water (DLW)? ...

What is Double Labelled Water (DLW)? Technique DLW is currently considered the most accurate technique for measuring TEE in free- living individuals. It is the method used to m

What are some prophylactic measures for tapeworm infections, Q. What are so...

Q. What are some prophylactic measures for tapeworm infections? The major prophylactic measures against the taeniasis and the cysticercosis are not to ingest raw or badly cooke

Terrestrial adaptation of some species of the phylum, Q. How can the featur...

Q. How can the features of the arthropod exoskeleton describe the terrestrial adaptation of some species of the phylum? In the arthropod exoskeleton there is a layer of wax whi

Evaluate the claim of sodium-dependent vitamin C transporter, Problem-solvi...

Problem-solving essay. Maximum 800 words. Deadline 12th of March. Show me you understand what this essay requires

What are organic compounds in the cytoplasm, High salt concentrations can b...

High salt concentrations can be toxic to plants as they have the potential to disrupt essential cell functions. Yet many halophytes sequester high amount of salt in their vacuoles,

Mitoses and meosis, how do mature sperm differ from those that are not full...

how do mature sperm differ from those that are not fully developed

Dna replication, DNA Replication Deoxyribonucleic acid (DNA) is the car...

DNA Replication Deoxyribonucleic acid (DNA) is the carrier of genetic data for all living creatures. An organism's genome, made of DNA, encodes the genetic blueprint for buildi

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd