about bacteria

When writing about bacteria, the binomial nomenclature scheme should be used, i.e. a genus name and a species name. Both parts are conventionally set in italic type.

The genus name begins with a capital but the species name does not.

Examples include
Staphylococcus aureus, Escherichia coli and Clostridium difficile. The genus name can also be abbreviated to the initial letter followed by a full point and a space, i.e. S. aureus, E. coli or C. difficile. The species name should not be abbreviated, so avoid C. diff.

redundant acronym syndrome

Watch out for redundancy when following a set of initials with the word for which the final initial stands.

A beautiful example would be the sentence I went to the ATM machine at the TSB Bank and keyed in my PIN number.

Similarly, asap if possible and please RSVP.  This is called is called RAS syndrome.

our new mission

We have a new mission: to save the world's media from embarrassment.

We want to teach the world some basic science, one word or phrase at a time.

Let's start with carbon dioxide. The chemical formula is CO2. First note that CO2 is the chemical formula, not the abbreviation (that would be CD, wouldn't it?).

So, it's capital C (the chemical symbol for carbon, an element), capital O (the chemical symbol for oxygen, another element), not a zero, then a subscript 2 to indicate that there are two atoms of oxygen in the molecule. The digit should always be subscript, not on the line and never superscript.

To make this clear, the following are all wrong: CO2, C02 and CO2.

reticent

Reticent is often used when reluctant or hesitant would be more appropriate. 

Reticent means taciturn or uncommunicative:

He was reticent about his wartime experiences.

You can't be reticent to do something:

They were reticent to agree.

would be better phrased as

They were reluctant to agree.

Plexiglas

Note the spelling. It's not Plexiglass.

affect and effect

By special request from one of our clients...

This is a tricky one as both affect and effect can be used both as a noun and as a verb. Usually, however, if a verb is being used then affect is correct and if a noun is being used effect is correct.

Affect
As a verb, affect means to influence or to adopt a pose or manner.

The outcome of treatment is affected by patients' degree of compliance.

The girl affected a couldn't care less attitude.

As a noun affect means an emotional state. It is rarely encountered outside the realm of psychiatry. So, most people are unlikely ever to use affect as a noun; however, you may well come across it in medical titles.

Effect
We don't think anyone is likely to have difficulty in comprehending the usual meaning of effect: something brought about; a result.

The effect of treatment was an improvement in patients' quality of life.

But effect may also be used as a verb, meaning to cause to happen.

The drugs effected a significant improvement in patients' quality of life.