Classification. S aureus and S intermedius are coagulase positive. All other staphylococci are coagulase negative. They are salt tolerant and often hemolytic. What is coagulase negative Streptococcus? Coagulase-negative staphylococci (CoNS) are a type of staph bacteria that commonly live on a person’s skin. Doctors typically consider CoNS bacteria harmless whenRead More →

The chemical notation for potassium is K+. The proper level of potassium is essential for normal cell function. What does it mean if K atom becomes K+ ion? The ions are charged because the number of negatively charged electrons no longer cancels out the number of positively charged protons. PotassiumRead More →

By increasing the amount of neighborhood interaction between households of varying socioeconomic status, gentrification might lead to long-term improvements in the living standards of poor households, for the same reason that central city abandonment might lead to long-term reductions. Why is gentrification an issue? Gentrification is a highly contested issue,Read More →

Negative reinforcement occurs when a certain stimulus (usually an aversive stimulus) is removed after a particular behavior is exhibited. … With negative reinforcement, you are increasing a behavior, whereas with punishment, you are decreasing a behavior. Does negative punishment work? Negative punishment can be very effective in reducing bad orRead More →

Pressure Potential Positive pressure inside cells is contained by the cell wall, producing turgor pressure. Pressure potentials are typically around 0.6–0.8 MPa, but can reach as high as 1.5 MPa in a well-watered plant. What is the osmotic pressure of a plasmolysed cell? The extent of plasmo- lysis is thusRead More →

Antimatter particles share the same mass as their matter counterparts, but qualities such as electric charge are opposite. The positively charged positron, for example, is the antiparticle to the negatively charged electron. Do phonons have negative mass? A phonon — a particle-like unit of vibration that can describe sound atRead More →

Can a barely visible pregnancy test result be negative? A barely visible pregnancy test result usually can’t be negative — because it detected hCG — but it might indicate a false positive for actual pregnancy or an early pregnancy loss. You can also get a false negative result. Why isRead More →

So, if you do get a faint line, Kirkham recommends waiting two or three days, then testing again. If it’s still faint, she suggests going to your family doctor for a blood test, which can measure the specific amount of beta hCG, to check if the pregnancy is progressing asRead More →

Gram-positive cocci (streptococci and staphylococci) are the most commonly identified organisms in deep neck infection. The retropharyngeal space extends into the thorax. What is found in gram-positive bacteria? Gram-positive organisms have a thicker peptidoglycan cell wall compared with gram-negative bacteria. It is a 20 to 80 nm thick polymer whileRead More →

Detect a negative cycle in a Graph | (Bellman Ford) Initialize distances from the source to all vertices as infinite and distance to the source itself as 0. … This step calculates the shortest distances. … This step reports if there is a negative weight cycle in the graph. WhatRead More →