There are many ways of classifying bacteria. One method is based on the cell membrane. In 1884, a bacteriologist named Christian Gram created a test that could determine if a bacterium had a thick, ...

In this study, we have shown that there are seasonal differences in the onset of the (Epstein–Barr virus) EBV-positive and -negative forms of paediatric Hodgkin's lymphoma (HL). This suggests ...

Although chlamydia is highly contagious, it does not always transmit to a person’s sexual partners. It is also possible to have a false-negative or false-positive test result. Having more frequent sex ...

There is an old joke:<BR><BR>A linguistics professor told his class "in English, a double negative forms a positive. In some languages though, such as Russian, a double negative is still a negative.

Lightning is a dangerous part of any thunderstorm, but did you know there are both positive and negative lightning strikes? Lightning develops due to the buildup of charges in the top and bottom of a ...

Hepatitis A blood tests check for immunoglobulin M (IgM) and immunoglobulin G (IgG) antibodies. An IgG-positive and IgM-negative result may suggest immunity to hepatitis A. A doctor may request a ...

Negative thinking considers the weaknesses of human nature, the disadvantages of change, and how things can go wrong. Positive thinking considers the goodness of people, the advantages of change, and ...

We may receive a commission on purchases made from links. Every consumer battery that exists has little plus and minus signs on the outer labeling. These mark the ending and starting points for the ...

Imagine that you are a clinician who delivers psychological treatment to depressed clients. Would you be able to alleviate the prolonged sadness of your clients by “prescribing” them high doses of ...