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Tag: "bitter" at biology news

Researchers reveal the infectious impact of salmon farms on wild salmon

... of sea lice from farms to wild salmon. However, a bitter debate continues in British Columbia and the Pacific Northwest as to whether salmon farms are contributing to sea lice infections of wild salmon at all. "Parasites are a key negative side effect of fish farms on the local fish stocks," says Andrew D...

Children's taste sensitivity and food choices influenced by taste gene

... like. We also know that many children do not like bitter taste, thereby interfering with vegetable consumpt...gene, which encodes a taste receptor responsive to bitter taste. Using cheek swabs to obtain genetic samples, researchers classified 143 children and their m...

Evolution of taste receptor may have shaped human sensitivity to toxic compounds

... new evidence suggesting that the ability to taste bitter compounds has been strongly advantageous in human evolution. Animals rely on chemical perception, including the senses of taste and smell, for protection against the harmful compounds found in nature. It is widely believed that behavioral and dietar...

Promiscuous Catalytic Activity Possessed by Novel Enzyme Structure

...stance, compounds found in hops that give beer its bitter taste or in other plants act as sunscreens, pigments, or antibiotics ?to olivetol, a component in the production of THC, the active ingredient of marijuana. Unlike other previously known prenylation enzymes that only act on a small number of molecule...

Stem cell training program to make its Stanford debut

...stance, compounds found in hops that give beer its bitter taste or in other plants act as sunscreens, pigments, or antibiotics ?to olivetol, a component in the production of THC, the active ingredient of marijuana. Unlike other previously known prenylation enzymes that only act on a small number of molecule...

Bitter or sweet? The same taste bud can tell the difference

...ongue's ability to differentiate between sweet and bitter tastes may reside in the same taste bud cells, a n...ess thinks that CCK tells the brain that something bitter is on the tongue, while NPY sends a message that something sweet is being eaten. "We were surprised...

Living taste cells produced outside the body

...vealed that the cultured cells responded to either bitter or sweet taste stimuli with increases of intracell...ules, including potential artificial sweeteners or bitter blockers, can be evaluated to see if they interact with taste receptors to activate the cell. Anot...

Great (taste) expectations: Study shows brain anticipates taste, shifts gears

...sequently dripped into the mouth would have a very bitter taste. A "zero "cue corresponded with a neutral taste, and a "plus sign" with a pleasant, sugary taste. The cues, according to Nitschke, were flashed to subjects just prior to the administration of a few drops of liquid. But in the study, the cues w...

How taste response is hard-wired into the brain

...tly reacting to the sweet lure of chocolate or the bitter taste of strychnine would seem to demand that such...t the Gr66a receptor was essential for response to bitter tastes. However, those studies left open the question of whether those different neurons selectively...

Less is more, gene study shows

...ervation. Also, in a previous paper we showed that bitter taste receptor genes tended to become unimportant in humans, and we put forth a hypothesis to explain why: The ability to taste bitterness is important for detecting toxins in food, and most of those toxins are in plants. About 1 to 2 million years a...

Research updates 65-year-old genetic discovery

...rmine which humans and which chimpanzees can taste bitter substances. For humans, this taste sensitivity may...ly a few years ago, in 2003, that sensitivity to a bitter compound known as phenylthiocarbamide (PTC) was mapped in human genes. "That gene was found to be c...

Variation in bitter-taste receptor gene increases risk for alcoholism

...d on TAS2R16, which helps regulate the response to bitter tastes. They found a single base variation in the...eptor produced by this gene was less responsive to bitter compounds. "The more common variant is more sensitive to bitter tastes, and people with that varian...

Scientists solve sour taste proteins

...c basis of other primary types of flavors, such as bitter and sweet, is known, this is the first study to de... taste -- sweet cells respond to sweet substances, bitter cells to bitter substances, and so on. Taste receptors, proteins on the surface of these cells, are ...

Study identifies substances in grapefruit juice that interact dangerously with some drugs

...were the flavonoids that give grapefruit juice its bitter taste. The new study shows that a group of chemicals called furanocoumarins are the likely culprit. "This is the best evidence to date that furanocoumarins are the active ingredients in grapefruit juice that cause the interaction with medications,...

Bitter taste identifies poisons in foods

...s at the Monell Chemical Senses Center report that bitter taste perception of vegetables is influenced by an...urrent Biology. Scientists have long assumed that bitter taste evolved as a defense mechanism to detect potentially harmful toxins in plants. The Current Bi...

Psst! Coffee drinkers: Fruit flies have something to tell you about caffeine

...enes and proteins that explain how animals discern bitter from sweet, a team of Johns Hopkins researchers be...by the taste of others. By color-coding sweet and bitter substances eaten by fruit flies and examining the coloring that shows up in their translucent bellie...

Cocoa 'vitamin' health benefits could outshine penicillin

... for commercial cocoas because they tend to have a bitter taste. So there is huge scope for nutritional companies to develop epicatechin supplements or capsules Epicatechin is also found in teas, wine, chocolate and some fruit and vegetables. ...

Row over study puts Korea's scientific community under scrutiny again

This week's BMJ investigates a bitter row over a scientific paper that is putting Korea's scientific community under scrutiny once again. The dispute has pitted a young Korean doctor, Jeong Hwan Kim, against Kwang Yul Cha, a fertility specialist and one of the most powerful players in t...

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