It must be sterilized first because to clean the medium, so that no contaminations and also unwanted organisms grow.
To insure that all pathogens have been 'killed' and that only those from a cultured sample will grow.
so that there isn't any sort of contamination which may hamper the growth of bacteria.This is specifically important in case of growing pure cultures.
To prevent the growth of unwanted microorganisms, which may supplant the ones you actually want to grow.
By looking the turbidity in media.
to avoid contamination by microbes
if it is not contaminated
The one way to determine before child is born whether it will have an inherited disease is if the mother or father have it
the sergen kept his equpment sterile before the sergery
There are different types of Aseptic Techniques such as uphold of sterilastion. This is when you insure that the sterile sections in labs are kept sterile, by using sterile equiptment (such as gloves, etc) and washing hands for at least 2-5mins before entering sterile environments. Another technique is when dealing with sterile equiptment, not only do you use gloves, but ensure that you use the procedure of handeling equiptment in a certain way. Tilt the testube to the side for example, when you are screwing and unscrewing the lid of a container, using the side of your hands, not touching the rim with yor fingers etc. This should help a bit :)
A pure culture is usually derived from a mixed culture (one containing many species) by transferring a small sample into new, sterile growth medium in such a manner as to disperse the individual cells across the medium surface or by thinning the sample manyfold before inoculating the new medium. Both methods separate the individual cells so that, when they multiply, each will form a discrete colony, which may then be used to inoculate more medium, with the assurance that only one type of organism will be present
Perflurochemicals (perflurocarbons) are being researched into as an artificial blood Synthetic, and completely inert Sterile Cheap to produce - compared to real blood Can dissolve 5 times more oxygen then blood Free of biological material - sterile Needs to be combined with other agents before being used in the bloodstream (eg. Lecithin)
The one way to determine before child is born whether it will have an inherited disease is if the mother or father have it
Collection of a midstream clean-catch specimen.
the sergen kept his equpment sterile before the sergery
sterile gloves are clean never before used gloves, while non-sterile gloves have been used but are clean
Most often, the media used for animal tissue culture has to be filtered before growing cells in them. Media contains components like serum and other growth factor proteins. Therefore, the media cannot be sterilized through heat. Sterile filtration is a widely used method of obtaining sterile media
One is guaranteed to have no microorganisms on it inside the sterile packaging, the other is clean but is not guaranteed to have no microorganisms on it.
Length does not determine whether or not a CDL is required.
To determine whether the reaction was exothermic (gave off heat) or endothermic (absorbed heat).
Pre-natal testing can determine if the foetus is healthy or not... and whether it would be safe to treat the foetus before or after birth.
It is well known that food has more flavors the closer to a full moon it is. Thus to tell what day it is based on whether food tastes good, you just need to know what day of the month is full moon. Then determine whether food tastes better than the day before or worse to determine if it is before or after the full moon.
The only way you could guarantee no food poisoning would be to sterilize all your food before eating, which would make most foods unpalatable. And to eat with sterile gloves and sterile utensils in a sterile environment.
Know what the job requirements are before applying for a position. This will help you determine whether your skills, qualifications, experience, and education are a good fit for the position.