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

How do they affect the processing of genetic information, Q. What are intro...

Q. What are introns, and how do they affect the processing of genetic information? Introns, a feature of eukaryotic DNA, are intervening stretches of DNA lying between the exon

From which germ layer epidermis and nervous system originate, Q. From which...

Q. From which germ layer do the epidermis and the nervous system originate? What are other organs and tissues made from that germ layer? Epidermis and nervous system have the s

Is diabetes causes the cardiovascular disease, Q. Is Diabetes causes the ca...

Q. Is Diabetes causes the cardiovascular disease? Diabetes: Sustained hyperglycemia is associated with tissue damage and cardio- myopathies. You shall study about diabetes and

Define the term - the inner life of the genome, Based on your reading of th...

Based on your reading of the article "The Inner Life of the Genome" which of the following is a wrong statement regarding the organization of chromosomes within the nucleus? A.

rumen protection of nutrient (bypass nutrients) technology, Rumen protecti...

Rumen protection of nutrient (bypass nutrients) technology The amino acid and energy requirements of medium and high yielding cows and buffaloes are not fully met from the micr

Pulmonary arterial system changes, Q. Pulmonary Arterial System Changes ? ...

Q. Pulmonary Arterial System Changes ? a) Pulmonary Plethora With increased pulmonary arterial blood flow, pulmonary branches are visualized beyond the inner 2/3 of the lung

What is the molecular formula of glucose, Q. What is the molecular formula ...

Q. What is the molecular formula of glucose? How can its structural formula be explained? The molecular formula of glucose is C 6 H 12 O 6 . Structurally glucose is a hexago

What is the difference between disaccharides, Q. What is the difference bet...

Q. What is the difference between disaccharides and monosaccharides? What are some examples of monosaccharides and of disaccharides that form them? Monosaccharides are simple m

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