Search results
Results from the WOW.Com Content Network
Nicotine is a hygroscopic, colorless to yellow-brown, oily liquid, that is readily soluble in alcohol, ether or light petroleum. It is miscible with water in its neutral amine base form between 60 °C and 210 °C. It is a dibasic nitrogenous base, having K b1 =1×10 −6, K b2 =1×10 −11. [ 163 ]
History of tobacco. Tobacco was long used in the early Americas. The arrival of Spain introduced tobacco to the Europeans, and it became a lucrative, heavily traded commodity to support the popular habit of smoking. Following the Industrial Revolution, cigarettes became hugely popular worldwide.
The history of smoking dates back to as early as 5000 BC in the Americas in shamanistic rituals. With the arrival of the Europeans in the 16th century, the consumption, cultivation, and trading of tobacco quickly spread. The modernization of farming equipment and manufacturing increased the availability of cigarettes following the ...
Aztec women are handed flowers and smoking tubes before eating at a banquet, Florentine Codex, 16th century. Smoking's history dates back to as early as 5000–3000 BC, when the agricultural product began to be cultivated in Mesoamerica and South America; consumption later evolved into burning the plant substance either by accident or with intent of exploring other means of consumption. [1]
Tobacco contains the highly addictive stimulant alkaloid nicotine as well as harmala alkaloids. [ 1 ] Tobacco use is a cause or risk factor for many deadly diseases, especially those affecting the heart, liver, and lungs [ 2 ] as well as many cancers.
An electronic cigarette (vape) A cigarette is a narrow cylinder containing a combustible material, typically tobacco, that is rolled into thin paper for smoking. The cigarette is ignited at one end, causing it to smolder; the resulting smoke is orally inhaled via the opposite end. Cigarette smoking is the most common method of tobacco consumption.
Smokeless tobacco. A historical depiction of a man taking snuff using his thumb and forefinger. Smokeless tobacco is a tobacco product that is used by means other than smoking. [1] Their use involves chewing, sniffing, or placing the product between gum and the cheek or lip. [1] Smokeless tobacco products are produced in various forms, such as ...
Nicotinic agonist. A nicotinic agonist is a drug that mimics the action of acetylcholine (ACh) at nicotinic acetylcholine receptors (nAChRs). The nAChR is named for its affinity for nicotine. Examples include nicotine (by definition), acetylcholine (the endogenous agonist of nAChRs), choline, epibatidine, lobeline, varenicline and cytisine. [1]