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How long can agar be inside of a petri dish with no bacteria growing on it?
Agar can be kept in a petri dish in the refrigerator at 4 degrees Celsius for up to 7 days. If kept at room temperature there is a high chance of contamination occurring due to motile swarming bacteria such as Bacillus sp. or Proteus sp. All manufactured agar plates have an expiry date listed on the actual plate or optimum storage time and expiry date printed on the bottle of dehydrated media. It is generally a good idea to only make the amount of agar required to be used that day and avoid storage of the prepared plates for any period of time, this will allow for better results and less contamination. Also it is necessary to know which ingredients are present in the prepared media as some nutrients will degrade rapidly and should be used immediately after preparation.
What is meant by fire light of big bang?
I have no idea what you're talking about.
Are protozoa able to sense light?
I have no idea you tell me !
Can the speed of light be legislated?
"It's not only a good idea...It's the LAW!" LOL.
How did isac newton prove white light was composed of many colours?
It was already known that, when white light went through a prism, the light that came out was multi-colored. This meant either (1) the white light was made up of light of different colors or (2) when going through a prism, the white light had become contaminated, in the same way that clear water is colored by contaminants. Newtown showed that the multi-colored light could be re-combined into pure white light by going through a second prism. If idea (2) was correct, the light should have gotten MORE contaminated, and been MORE colorful. If (1) was correct, the light would re-combine into white light. When the experiment found that white light resulted from a second prism, idea (1) was shown to be correct.
Use of petri dishes?
A petri dish is a type of glass or plastic shallow round dish with a close fitting lid which is a vital tool in scientific laboratories. The uses for the petri dish are varied, but it is most well known for holding a culture medium upon which cells, bacteria, and viruses can be grown and studied. Most major scientific breakthroughs have been greatly assisted by the use of petri dishes whether they involve the structure of a virus or the ability to clone meat. The invention is named for Julius Richard Petri, who conceived of the idea in 1877, frustrated with existing tools for cultures. Most scientists used shallow bowls or bottles, which were awkward to work with and subject to contamination. Petri thought that a shallow circular dish would be easier to work with, and easy to make a lid for. The lid keeps the petri dish from being contaminated, and the basic shape makes them easy to stack and arrange in varied configurations. When a petri dish is used to culture cells, it is usually filled with a growth medium made from agar, a gel made with extracts from red algae, and a variety of nutrients. The growth medium has a gelatinous texture which most cultures thrive on, although sometimes the nutrients need to be varied to meet the needs of the organism being cultured. To satisfy the needs of finicky organisms, a scientist may take several weeks to adjust the environment of a series of petri dishes. Once the culture starts to thrive, the organism can be researched. There are other uses for the petri dish: many schools, for example, use them to teach students about seed germination, as the clear dish allows the observer to see every step of growth. In addition, the petri dish is commonly used for dissection, because it is ideally sized to be placed under a microscope. A petri dish can also be used for basic experimental purposes like transporting liquids in sterile containers or drying fluids for study. Other uses for the petri dish are constantly being explored by the scientific community, and it is a laboratory tool that is unlikely to be abandoned in the near future. Major advancements in science such as growing cells integrated with electronic circuits, cloning organs, and understanding viruses have been accomplished with the aid of the humble petri dish. Although other methods of studying organisms in the laboratory are being developed, the need for the basic ability to culture organisms rapidly in a sterile environment will never fade.
What happens if you put dish soap in the dish washer?
Not a good idea. It will overflow with suds and make a big mess.
Why does dish network only offer Fox news on family plan?
i have absolutely no idea.
Germany main food dish?
i have no idea so hahaha ull never know mwahahahahahahahahahahahahahahaha!!!!!!!!!!>:{
What is a big idea icon?
i aint have the faintest idea A light bulb.
Why does mixing yellow light with red light make white light?
i have know idea
Why is the Golf Channel not on your Charter now?
No idea why, but Dish Network does offer Golf TV...it is on Channel 401.
Can you put a cold dish in a hot oven?
Not a good idea, it has a good chance of cracking or even exploding .
What zinc is light transmission?
I have no idea
How do you refract light with a Optical prism?
Refracting light is an excellent idea
Who proposed the idea that light consists of quanta of energy?
Albert Einstein proposed the idea the light exists of quanta of energy that he called photons.
Who discovered the electric light?
i have no idea lol
