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If you observed growth of gram negative organisms on the PEA plate you inoculated does the negate the usefulness of PEA as a selective medium why or why not?
Yes, the growth of gram-negative organisms on a PEA plate suggests that the medium is not effectively selective for gram-positive bacteria. PEA (Phenylethyl Alcohol Agar) is intended to inhibit gram-negative bacteria through the action of phenylethyl alcohol, so if gram-negative organisms are thriving, it indicates that their growth is not adequately suppressed. This could be due to several factors, including the specific strains or concentrations used, which may indicate limitations in PEA's selectivity under certain conditions.
What Is The Negative Effect Of Crystallization?
The Negative Effect of Crystallization is laser damage in high resistance mirrors. A grain boundary of HfO2 microcrystal was observed in the damaged area.
What is the main criterion by which scientist judge the usefulness of a model?
The usefulness of a model is based on the models ability to explain a set of facts. In light of new evidence and new facts within the models reported domain, if it can continue to explain these new facts, its robustness lends even more to its 'usefulness'.
Who observed streams of negative charged particles?
Streams of negatively charged particles, known as electrons, were first observed by British physicist J.J. Thomson in 1897. His experiments with cathode rays demonstrated that these particles were much smaller than atoms and had a negative charge. This discovery was pivotal in the development of atomic theory and led to the understanding of the structure of atoms.
True or false Darwin observed variations among individuals within a population but he did not realize that these variations were caused by selective breeding?
True, Darwin did realize that the observed variations among individuals within a population were caused by selective breeding. Although he did do a lot of great stuff. He wrote a book called The Origin of Species. You should check it out if you would like to find out the stuff that he did and what he found out about evolution. Either that or rent a book from a library about evolution.
If you observed growth of gram negative organisms on the PEA plate you inoculated does the negate the usefulness of PEA as a selective medium why or why not?
Yes, the growth of gram-negative organisms on a PEA plate suggests that the medium is not effectively selective for gram-positive bacteria. PEA (Phenylethyl Alcohol Agar) is intended to inhibit gram-negative bacteria through the action of phenylethyl alcohol, so if gram-negative organisms are thriving, it indicates that their growth is not adequately suppressed. This could be due to several factors, including the specific strains or concentrations used, which may indicate limitations in PEA's selectivity under certain conditions.
When is a residual negative?
The residual for a particular point in a regression is negative if the estimated or fitted value at that point is greater than the observed value.
What negative effect is observed in a digital camera when raising the ISO?
currently, it raises "noise" in a photo. In a few years, there's a good chance there will be no negative effect.
What Is The Negative Effect Of Crystallization?
The Negative Effect of Crystallization is laser damage in high resistance mirrors. A grain boundary of HfO2 microcrystal was observed in the damaged area.
What is the onset of action for SSRIs?
The onset of action for SSRIs (selective serotonin reuptake inhibitors) typically ranges from 1 to 4 weeks before noticeable improvement in symptoms is observed.
How do you interpret a negative z- score?
A negative z-score indicates that the observed value (or statistic) was below the mean. In non-directional tests, a negative z-score is just as likely as a positive one.
In the inverted region of Marcus, what unique characteristics or phenomena can be observed?
In the inverted region of Marcus, unique characteristics or phenomena such as negative differential resistance and negative differential capacitance can be observed. These phenomena involve the decrease in current or capacitance with increasing voltage, which is opposite to the typical behavior in electronic devices.
Why staph aureus grows on macconkey agar?
Staphylococcus aureus does not typically grow on MacConkey agar, as this medium is selective for Gram-negative bacteria, particularly Enterobacteriaceae, due to its bile salts and crystal violet dye that inhibit Gram-positive organisms. However, if S. aureus is observed on MacConkey agar, it may be due to contamination or the presence of certain strains that can tolerate the inhibitory conditions. Generally, for the isolation of S. aureus, media such as mannitol salt agar is more appropriate since it is selective for staphylococci.
What is the main criterion by which scientist judge the usefulness of a model?
The usefulness of a model is based on the models ability to explain a set of facts. In light of new evidence and new facts within the models reported domain, if it can continue to explain these new facts, its robustness lends even more to its 'usefulness'.
What was J J Thompson's hypothesis when he observed that rays bend toward a positively charged plate and give a negative charge to objects they strike?
He hypothesized that cathode rays are streams of electrons or negative charges
What's a negative control?
A negative control is a control group in an experiment where the variables are not expected to have an effect. It helps researchers to determine if any observed effects are due to the treatment being tested or other factors.
Who played an important role in smallpox vaccination?
Edward Jenner, a physician in the late 18th century, is credited with being the "Father of Immunology." It was observed at the time that milkmaids had a lower incidence of smallpox than the general population. Jenner believed that the milkmaids caught cowpox from cows by contact with blisters. Jenner inoculated an 8 year old boy by transferring material from cowpox blisters of an infected person onto the scratched skin of the boy. Cowpox, although not the same as smallpox, is similar to the virus. People inoculated with cowpox material were able to be immune to smallpox.
