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Sweetness is a basic taste most commonly perceived when eating foods rich in sugars. Sweet tastes are regarded as a pleasurable experience, except perhaps in excess.
Fructose is sweeter than glucose and sucrose. This has made possible the production of sugar syrups with the sweetness and certain other properties of sucrose starting from starch.
In addition to sugars like sucrose, many other chemical compounds are sweet, including aldehydes, ketones, and sugar alcohols. Some are sweet at very low concentrations, allowing their use as non-caloric sugar substitutes. Such non-sugar sweeteners include saccharin and asapartame. Other compounds, such as miraculin, may alter perception of sweetness itself.
The chemosensory basis for detecting sweetness, which varies between both individuals and species, has only begun to be understood since the late 20th century. One theoretical model of sweetness is the multipoint attachment theory, which involves multiple binding sites between a sweetness receptor and a sweet substance.
Studies indicate that responsiveness to sugars and sweetness has very ancient evolutionary beginnings, being manifest as chemotaxis even in motile bacteria such as E. coli. Newborn human infants also demonstrate preferences for high sugar concentrations and prefer solutions that are sweeter than lactose, the sugar found in breast milk. Sweetness appears to have the highest taste recognition threshold, being detectable at around 1 part in 200 of sucrose in solution. By comparison, bitterness appears to have the lowest detection threshold, at about 1 part in 2 million for quinine in solution. In the natural settings that human primate ancestors evolved in, sweetness intensity should indicate energy density, while bitterness tends to indicate toxicity The high sweetness detection threshold and low bitterness detection threshold would have predisposed our primate ancestors to seek out sweet-tasting (and energy-dense) foods and avoid bitter-tasting foods. Even amongst leaf-eating primates, there is a tendency to prefer immature leaves, which tend to be higher in protein and lower in fibre and poisons than mature leaves. The 'sweet tooth' thus has an ancient evolutionary heritage, and while food processing has changed consumption patterns, human physiology remains largely unchanged.
Very Cool 7.5” AR Pistol Upper.
A great topper for one of those extra lowers you have sitting in the safe waiting for a project.
What is included:
Anchor Harvey Aluminum Forged Upper Receiver
7.5” 5.56 NATO barrel
ELD Performance Alpha Series AR-15 7.5
6.5” X Products Cobra Rail
Edit: 325 and I'll pick up the BGC at Sound Loan I'm Everett.
Great carry gun-- just getting away from 9mm and sticking with .45/.45Colt that I reload for. Absolutely flawless function with LRN, HP, etc. Very few +P through it as I don't like them in any of my guns (20-40). Great accuracy...
Should campaign signs be positive for pro2a candidates or negative against anti-2a candidates? And what types of messages should be relayed? Any one care to share some sign ideas with very short messages?