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To clean a streak plate I use coke classic. In the red can, the diet version does not work as well. I believe it is the acid that takes away the powdered rock debris. It makes them quite white again. Mr clean magic eraser also takes away some of the heavy debris...but does not get them clean enough.
What else can I help you with?
How would you determine whether a colony was a contaminant on a streak plate?
One to determine whether a colony on a streak plate is a contaminant is by observing whether it is located along the streak lines. Another is to compare the size, shape, texture and color of the colony against an uncontaminated sample to see if it matches previous ones. Anything growing beyond streak lines and outside of the expected pattern of growth is an obvious contaminant.
How could you tell if one of the colonies on the plate was a contaminant that fell in from the air?
If one of the colonies was to be contaminated by something in air, you would be able to tell by there being a difference in look for specimen. Also looking to see if something is growing on top of smooth specimen.
If an inoculated plate had colonies between the streak lines what would you conclude?
It depends, if there is no growth or colony appearance on streak line and only it shows growth in b/w the streak line then it is certainly a contamination and if there are colonies on streak line and not ressemble with the streak culture then also it is a contamination but there can be a chance that colony appears due to some fault in streaking procedure and the inoculum drops between the streak line so it depends.
What physical evidence obtained from the crime scene could be used to obtained DNA?
Examples of physical evidence that could be used to obtain DNA include blood stains, hair follicles, skin cells, and saliva. DNA can be extracted from these samples and analyzed to help identify potential suspects or victims in a criminal investigation.
When a controlled experiment is not possible why do scientist try to identify as many relevant variables as possible?
Scientists try to identify as many relevant variables as possible in order to account for potential confounding factors that could affect the outcome of the study. By identifying and controlling for these variables, researchers can increase the validity and reliability of their results, even when a controlled experiment is not possible.
How would you determine whether a colony was a contaminant on a streak plate?
One to determine whether a colony on a streak plate is a contaminant is by observing whether it is located along the streak lines. Another is to compare the size, shape, texture and color of the colony against an uncontaminated sample to see if it matches previous ones. Anything growing beyond streak lines and outside of the expected pattern of growth is an obvious contaminant.
Which physical contaminant could be associated with salmon?
Fish bone
Could a ph-sensitive color indicator be ussed to reveal the presence of a contaminant in a fluid that should be sterile?
Yes, a pH-sensitive color indicator can be used to detect the presence of a contaminant in a fluid that should be sterile. When the contaminant alters the pH of the fluid, causing a color change in the indicator, it indicates contamination. This method can provide a quick visual indication of potential contamination.
Two minerals have the same color and luster what else could you use to identify the mineral?
Examples of mineral characteristics: - density - hardness - refractive index - chemical composition - magnetic properties - cleavage - crystal system - radioactivity
What is a streak of light in the atmosphere?
A streak of light in the atmosphere could be a meteor burning up as it enters Earth's atmosphere or a plane's contrail reflecting sunlight. It could also be caused by a shooting star or space debris re-entering the Earth's atmosphere.
What is used to find the streak of a mineral?
The streak of a mineral refers to the color left on a streak plate after rubbing a mineral across its surface. A streak plate can be as simple as the unglazed side of a porcelain tile. The streak is the mineral in a powdered form from abrasion with the hard, slightly textured surface of the unglazed porcelain streak plate. The streak color may differ from the color observed in a specimen. The streak is used as an aid in the identification of minerals.
Could a pH sensitive color indicator be used to reveal the presence of a contaminant in a fluid?
yes
Why could the streak of corundum be difficult to determine?
Corundum has a streak that is typically colorless, making it difficult to determine on a streak plate. The hardness of corundum (9 on the Mohs scale) can also affect the accuracy of the streak test, as it can scratch the streak plate instead of leaving a distinct streak.
What is rock streak?
Streak is a method used to help identify minerals. A mineral can have very similar characteristics such as luster, colour, hardness, specific gravity ect, but even minerals with very similar characteristics including colour can have different streaks...which is the 'colour' the mineral makes on a scratch plate when drawn accross it in a stroke..thus creating the streak.
What is an angery streak?
"Angery streak" is not a recognized term. It may be a misspelling or a misunderstanding of "angry streak," which could refer to a period of time when someone consistently displays anger or irritability in their behavior.
What 7 things could you predict during the predicat part of the ipde process?
During the prediction phase of the IPDE process (Identify, Predict, Decide, Execute), you could predict potential hazards, the actions other road users might take, changes in road conditions, your own reaction time, the potential behavior of pedestrians, potential weather changes, and potential vehicle malfunctions.
Did undertakers streak end?
No Undertaker's streak did not end (sadly i wanted hbk to end it). If you watch the latest wrestlemania wich is wrestlemania 27 Triple H could not end the 19-0 streak(sadly).
