It is correct and usable in written English.
You might use it for example when you are providing an example to explain your point further. For example: "This type of approach is often used in education, as an example note, video conferencing has become increasingly popular in the distance learning environment."
His daily updates from the Centers for Disease Control and Prevention in Atlanta, for example, note that visitors to Panama should get vaccines to protect against malaria, yellow fever, hepatitis A and dengue fever.
Few of the recent caricatures of Jack Grubman, for example, note that the former Salomon Smith Barney analyst reached his position of power -- with the obscenity of his compensation -- because he was institutional investors' favorite telecom analyst.
White House officials, for example, note that China, which had remained in the background at the United Nations when the United States pressed for more pressure on Iran, has now signed on to two rounds of (mild) sanctions.
As a simple example, note dy/dx + Py = Q, in which P and Q can be constants or may be functions of the independent variable, x, but do not involve the dependent variable, y.
In this example, note that f and S are discontinuous.
As an example note that (1.1) has no solution for and (2.6).
For example, note how a porous located at the left implies a maximum on the signal displaced to the right.
Their guidelines, for example, note that "sexual fetish material, including bondage or sadomasochistic activity, urination and other bodily functions" is forbidden.
As an example, note the state transitions in Fig. 10 which shows the internal states of the algorithm for a simulated control scenario.
By way of example, note that it's generally true that people who deliberate before they act do things that are more in their interests than those who simply act impulsively, without deliberation.
For example, note that the lemma only provides a (provable) material equivalence between D and A ⌈D⌉) (which states that both sides must have the same truth-value) and does not claim any sort of sameness of meaning.
