XNA is synthetic DNA that's stronger than the real thing. But scientists have been synthesizing XNA molecules for well over a decade.
Your link appears not to be a link, but certainly PNAs (peptide nucleic acids - not really nucleic acids, but still ...) and GNAs (glycol nucleic acids) have been documented since the early '90s, so, yes, considerably more than a decade. "Overall, this leads to high cost and a high failure rate for potential therapies - there is still only a single licenced [nucleic acid-based] drug on the market (Macugen).
" Point take, but, well, this is hardly just an issue with nucleic acid-based therapies, is it? And thus, these molecules would need little or no adaptation for therapeutic (or diagnostic) use. "Since these molecules can now be selected directly on XNA, medicinal chemistry should no longer be limiting," says Pinheiro. What? Also, to claim that "these molecules would need little or no adaptation for therapeutic (or diagnostic) use" is utterly disingenuous. Hard evidence that giant tyrannosaurs were cuter than you ever thought possible.
One of the Most Well-Preserved Woolly Mammoths We've Ever Found. Déclin des abeilles : les pesticides néonicotinoïdes reconnus coupables. Rayons de cire d'abeilles domestiques portant des œufs et des larves.
Les parois des cellules ont été enlevées. Les larves (des faux-bourdons) sont âgées de 3 à 4 jours. Chez le bourdon terrestre, une exposition à de l'imidaclopride provoque une diminution du nombre de larves en cours de croissance. Beaucoup de cellules restent vides. © Waugsberg Licence de documentation libre GNU, version 1.2 Déclin des abeilles : les pesticides néonicotinoïdes sur la sellette - 3 Photos Les populations d’abeilles sont en plein déclin depuis quelques années. Les insecticides néonicotinoïdes, dont l'utilisation est largement répandue sur la Planète, agissent sur le système nerveux central en bloquant les influx et ce, dès une exposition à de très faibles doses (quelques nanogrammes). Plusieurs hypothèses relient la surmortalité des abeilles à l’emploi de néonicotinoïdes. Bourdons : moins de jeunes et de reines Abeilles : une navigation faussée A voir aussi sur Internet Sur le même sujet. Ugliness is nature's way of keeping species from interbreeding.
Actually, if I'm not mistaken, there has for years been debate over what the line between a "different species", a "subspecies", and a "slightly different population" would be.
I mean, some cases are obvious - it's clear that fish and humans are different species, because we don't even reproduce the same way or breath the same way or anything important like that. But what of dogs and wolves? They can interbred perfectly fine, producing fertile offspring even when the pairing is a wild wolf and a heavily-domesticated dog breed like a Border Collie. But speaking of dogs,, what of the chihuahua and the Great Dane? You can mate a male chihuahua to a female Great Dane just fine (in fact, it tends mostly to just produce a smaller Great Dane), but if you were to mate a female chihuahua to male Great Dane, the size difference could prove disastrous for the female and therefore the offspring.