Dating html links
Negative Consequences: Even casual and light carries some risk to it, simply because it puts you in close, intimate contact with another person (and all their germs), though this is not generally much of a deterrent unless you KNOW the other person is currently sick.
Also, even light kissing carries a slight risk for catching Herpes and Scabies if kissing someone who has open sores or cuts immediately around their mouth.
Before anyone completely panics about kissing ANYONE, as long as you don't kiss someone who is known to be sick (like the flu, or who has mono, etc.), and don't kiss someone with ugly, dripping, oozing, puss-filled sores right around their lips then light kissing is actually considered to be a safe behavior.
Deep carries the same risks as light kissing, plus the exchange of fluids (the aforementioned spit-swapping) increases those risks.
Ninety-five percent of the activity of Oxalic Acid from the year 1950 is equal to the measured activity of the absolute radiocarbon standard which is 1890 wood.
Amongst accelerator laboratories there has been mooted the theoretical possibility of extended range dating to 75 000 yr , at present this seems difficult to attain because of the problems in accurately differentiating between ions that mimic the mass and charge characteristics of the C14 atom.
Beukens (1994) for instance has stated that this means the limit of the range for his Isotrace laboratory is 60 000 yr which is very similar to the conventional range.
Figure 1: This gif shows the comparison in radioactivity between a sample, or unknown (green area) , a modern standard (dark blue) and a background (small red peaks) derived from beta decay. A radiocarbon measurement, termed a conventional radiocarbon age (or CRA) is obtained using a set of parameters outlined by Stuiver and Polach (1977), in the journal Radiocarbon.
A time-independent level of C14 activity for the past is assumed in the measurement of a CRA.