Are Candels making sick???

WEDNESDAY, Aug. 19 (HealthDay News) -- Paraffin wax candles, used mainly for romantic ambiance, fragrance and light, may also contribute to air pollution inside your home.

The candles, which are made from petroleum, are a source of known human carcinogens and indoor pollution, researchers said in a study to be presented Wednesday at the American Chemical Society's national meeting in Washington, D.he study, R. Massoudi and Amid Hamidi found that candles made from beeswax or soy, although more expensive, apparently are safer because they do not release potentially harmful pollutants.

"An occasional paraffin candle and its emissions will not likely affect you," Hamidi said in a news release. "But lighting many paraffin candles every day for years or lighting them frequently in an unventilated bathroom around a tub, for example, may cause problems."

Ventilation can help reduce the level of pollutants in closed rooms, the researchers said.

Besides the more serious risks, Hamidi also said that some people who believe they have an indoor allergy or respiratory irritation may actually be reacting to pollutants from burning candles.

DNA sequence?

A DNA sequence or genetic sequence is a succession of letters representing the primary structure of a real or hypothetical DNA molecule or strand, with the capacity to carryinformation as described by the central dogma of molecular biology.

The possible letters are A, C, G, and T, representing the four nucleotide bases of a DNA strand — adenine, cytosine, guanine, thymine — covalently linked to a phosphodiesterbackbone. In the typical case, the sequences are printed abutting one another without gaps, as in the sequence AAAGTCTGAC, read left to right in the 5' to 3' direction. Short sequences of nucleotides are referred to as oligonucleotides and are used in a range of laboratory applications in molecular biology. With regard to biological function, a DNA sequence may be considered sense or antisense, and either coding or noncoding. DNA sequences can also contain "junk DNA."

Sequences can be derived from the biological raw material through a process called DNA sequencing.