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Where could the organisms have come from in the 1768 broth experiment described?
Wiki User
∙ 11y ago
the organisms could come from the heat in the broth if you boil it,cause if you boil it,it creates organisms. It will only work if you put a cap on top of the bottle you are boiling. the one with the cap on is not cantaminated. The one without the cap is cantaminated and already has organisms in it.so the organisms come from the oxygen in the one where it does not have the cap on
Wiki User
∙ 11y ago
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What did Lazzaro Spallanzani contributes to microbiology?
He repeated John Needham's experiment in which nutrient fluids (Chicken broth) was put into a sealed flask then heated. The nutrient medium could be stored and microoganisms did not arise from it. This experiment disproved the Spontaneous Generation and paved the way for Pasteur's research. Spallanzani was largely criticised under claims that microorganisms needed oxygen to survive. He was also a pioneer in the fertilization an experiment which he produced with frogs. :) hope that helps.
Who stated that all cells come only from other living cells?
Louis Pasteur was responsible for the development of the swan knecked flask experiment which effectively disproved the previously accepted theory that cells were spontaneously generated from non-living matter (abiogenisis- without reproduction of cells). Pasteur was alive from 1822-1895 and during that time people debated the issue with reference to how bacteria and mould could just "appear" on food and drink. Many believed that just because you boiled some broth and covered it to show that no bacteria grew did not prove that bacteria came flying in through the air,because boiling killed the "active substace" and air was also needed for spontaneous generation of bacteria. So pasteur developed the swan-knecked flask which allowed air in, but trapped any microorganisms in the bend of the kneck, preventing them from reaching the broth. He added beef broth to these swan-necked flask, boiled them to kill any microorgansms that may already be present, and left them sitting. Months and months later there was still no growth of bacteria. But when he broke the kneck of one flask, bacteria grew in the broth within days. Also in another flask, he tilted itover so broth could pour into the bend of the neck then he straightened it again. This flask also had bacterial growthwithin a few days. The experiment showed that if bacteria -already living cells- were allowed into the broth, then more bacteria could grow, but if they were trapped in the neck and never got to the broth, the broth remained clear and free from bacteria. It is said there is still a Louis Pasteur swan-necked flask with broth in it, with no bacterial growth in it, this many years down the track.
Dichotomous thinking could be described?
black and white
Function of nutrient broth?
There are various types of nutrient broth, some selective, some not so. They are basically a liquid culture medium to enhance the growth of mircoorganisms from a sample, be it a human clincal sample, food, environmental sample or whatever. After the nutrient broth has been inoculated with the foresaid sample, it is generally incubated for a given length of time to encourage the growth of whatever is in the sample then identified.
Miller and urey's experiments attempted to demonstrate?
The Miller-Urey experiment combined amino acids and other chemicals thought to be a part of the primordial soup. The experiment attempted to demonstrate the conditions on Earth in its early years.
Before Pasteur experiment with beef broth and shaped tubing what did people think about cells?
Cells came from nonliving things.or Cells could generate spontaneously.
before pasteur’s experiment with beef broth and S-shaped tubing, what did people think about cells?
Cells came from nonliving things.or Cells could generate spontaneously.
How could you separate the solid ingredients from the broth?
you can strain the ingredients and broth with a strainer and take out the solid ingredients.
Is there a substitute to chicken broth?
I use McCormick's All-Vegetable Chicken Bouillon cubes....no meat, but has a nice flavor. They also come in All-Vegetable Beef cubes. They disolve quickly in hot water and can be used anywhere you'd use chicken (or beef) broth.
What could an archaeopteryx be described?
It could be described as the first bird.
What event proved that some organisms could live in the dark recesses of the ocean depth?
The testing of a nuclear hydraulic geothermal solar powered experiment of an organism's genitals
How could Roman consuls be described as?
They could be described as prime ministers.
What did Lazzaro Spallanzani contributes to microbiology?
He repeated John Needham's experiment in which nutrient fluids (Chicken broth) was put into a sealed flask then heated. The nutrient medium could be stored and microoganisms did not arise from it. This experiment disproved the Spontaneous Generation and paved the way for Pasteur's research. Spallanzani was largely criticised under claims that microorganisms needed oxygen to survive. He was also a pioneer in the fertilization an experiment which he produced with frogs. :) hope that helps.
How could you design an experiment to show how a fault is formed?
How could you design an experiment to show how a fault is formed
Can you substitute beef broth for condensed beef broth?
You could, but how you do it depends on your recipe. (I'm assuming here you want to substitute Swanson's for a more concentrated broth like Campbell's). If the recipe says add water to dilute the concentrated broth, obviously you wouldn't want to do that with the Swanson's. You'd just add the same total volume of liquid called for in the recipe. If you really wanted to be a purist, you could always concentrate the regular beef broth by reducing it down in a saucepan, or you could purchase a jar of beef base and add a little to the broth to give it a more concentrated beef flavor (but be careful how much you add, it can also add a lot of salt).
Could you give pascal's law experiment?
an experiment on pascal's law
What variable in a experiment is a water temperature?
it could be ethier or depeding on the experiment
