Matches in DBpedia 2016-04 for { <http://wikidata.dbpedia.org/resource/Q280190> ?p ?o }
Showing triples 1 to 33 of
33
with 100 triples per page.
- Q280190 subject Q18673693.
- Q280190 subject Q8235519.
- Q280190 subject Q8291343.
- Q280190 abstract "Freebase or free base refers to the pure basic form of an amine, as opposed to its salt form. The amine is usually an alkaloid natural product. Free base is commonly used in organic chemistry and pharmaceuticals to describe the deprotonated amine form of a compound.Some alkaloids are unstable in their pure form, but are more stable instead in ionic salt form. The salts usually exhibit greater water solubility. Common counterions include chloride, bromide, acetate, oxalate and, in case of chiral amines, tartrate. Because of the ubiquity of chloride salts, formed from the reaction of the amine with hydrochloric acid, these amine derivatives are known as the hydrochlorides. For example, compare the free base hydroxylamine (NH2OH) with hydroxylamine hydrochloride (NH3OH+ Cl−).The term "freebasing" means converting an ionic form into free base. It can refer to deprotonating the hydrochloride salt form of cocaine to free base form. The process provides for some merits of acid-base extraction. The free base is preferred for smoking because the evaporation point of the base is further apart from the burning point compared to the hydrochloride salt, making the salt form more prone to destruction by pyrolysis. Some of the active drug is lost in the deprotonation process.Freebasing can also refer to the consumption by smoking of free base cocaine (crack cocaine) or heroin. Freebasing became popular in the United States during the 1980s, mainly because of the fear of diseases spread by the sharing of hypodermic needles, such as HIV and viral hepatitis.".
- Q280190 wikiPageWikiLink Q108200.
- Q280190 wikiPageWikiLink Q11193.
- Q280190 wikiPageWikiLink Q1165892.
- Q280190 wikiPageWikiLink Q12140.
- Q280190 wikiPageWikiLink Q12370.
- Q280190 wikiPageWikiLink Q15787.
- Q280190 wikiPageWikiLink Q167198.
- Q280190 wikiPageWikiLink Q176848.
- Q280190 wikiPageWikiLink Q18673693.
- Q280190 wikiPageWikiLink Q1983841.
- Q280190 wikiPageWikiLink Q212527.
- Q280190 wikiPageWikiLink Q2329.
- Q280190 wikiPageWikiLink Q2409.
- Q280190 wikiPageWikiLink Q259997.
- Q280190 wikiPageWikiLink Q2686738.
- Q280190 wikiPageWikiLink Q30.
- Q280190 wikiPageWikiLink Q330694.
- Q280190 wikiPageWikiLink Q41576.
- Q280190 wikiPageWikiLink Q417351.
- Q280190 wikiPageWikiLink Q420060.
- Q280190 wikiPageWikiLink Q421356.
- Q280190 wikiPageWikiLink Q422423.
- Q280190 wikiPageWikiLink Q425046.
- Q280190 wikiPageWikiLink Q60168.
- Q280190 wikiPageWikiLink Q70702.
- Q280190 wikiPageWikiLink Q8235519.
- Q280190 wikiPageWikiLink Q8291343.
- Q280190 comment "Freebase or free base refers to the pure basic form of an amine, as opposed to its salt form. The amine is usually an alkaloid natural product. Free base is commonly used in organic chemistry and pharmaceuticals to describe the deprotonated amine form of a compound.Some alkaloids are unstable in their pure form, but are more stable instead in ionic salt form. The salts usually exhibit greater water solubility.".
- Q280190 label "Free base".