caffeine

Wisconsin researchers identify sleep gene

...n other studies, the scientists also observed that caffeine has the same stimulating effects on human and fly sleep, and that similar genes are expressed in both species when they are awake and asleep. Tononi's team also conducted EEGs on the flies and found evidence of the same electrophysiological changes o...

Nanoscale method for investigating living systems

...chemicals react with your body. When, for example, caffeine enters a cell it stimulates the opening and closing of these ion channels. What we've found is that these quantum dots can form artificial pores that enhance the flow of ions and which we can control from the outside via voltage." Quantum dots can b...

Clocking in Pillow Time without the Pillow

... drug's effects. Previous studies have shown that caffeine and amphetamine can reduce the deleterious cogniti...anybody who has indulged one latte too many knows, caffeine and other powerful stimulants have limited usefulness. These potentially addictive chemicals can dis...

Noise And Delays Explain Why Some Genes Oscillate In Activity

... drug's effects. Previous studies have shown that caffeine and amphetamine can reduce the deleterious cogniti...anybody who has indulged one latte too many knows, caffeine and other powerful stimulants have limited usefulness. These potentially addictive chemicals can dis...

No link found between caffeine intake and development of hypertension in women

...dies have indicated a possible association between caffeine intake and the risk of hypertension. Short-term studies have demonstrated that caffeine intake acutely increases blood pressure, but over time, weakening of this effect does occur. A long...

Coffee makes us more likely to say 'yes'

...e say 'yes', coffee can help. Moderate amounts of caffeine can have an impact on the extent to which we can b... from the University of Queensland found that with caffeine consumption we are more likely to attend to, and agree with, persuasive arguments. The experiments ...

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

...ed them to ignore caffeine's taste and consume the caffeine as if it were not there. "No, you won't see jitte...e between sweet and bitter substances, flies avoid caffeine and other bitter-tasting chemicals. But flies missing this particular taste-receptor protein, called...

First biomarker for human sleepiness identified in fruit flies

... Shaw's lab previously showed that they can use caffeine and methamphetamine to keep flies awake. Caffeine ...lase levels in response to these drugs, they found caffeine drove amylase activity up while methamphetamine did not. Flies dosed with the herbicide paraquat ...

Need to pull an all-nighter?

...ged wakefulness. Blocking adenosine receptors with caffeine prevented this nitric-oxide-induced slumber. Rosenberg sees the most pharmaceutical promise in developing drugs that prolong wakefulness by curbing production of nitric oxide or scavenging the gas once it's produced. The opposite ?a sleeping pill m...

Underweight women at greater risk of miscarriage

...tors, for example alcohol consumption, smoking and caffeine intake, remain controversial or unconfirmed. The researchers questioned 603 women aged 18-55 in the UK whose most recent pregnancy had ended in first trimester miscarriage (less than 13 weeks gestation) and 6,116 women whose most recent pregnancy...

Negative effects of caffeine are stronger on daytime sleep than on nocturnal sleep

...u Sacré-Coeur de Montréal. "We already knew that caffeine has important effects on nocturnal sleep. It incre...of deep sleep. We have shown that these effects of caffeine on sleep are way stronger when taken at night prior to a daytime recovery sleep episode than in the ...

Drug treatment improves learning in mice with Down syndrome symptoms, Stanford/Packard study shows

...renthusiastic college student can attest, too much caffeine can backfire. The same is true with high doses of PTZ, which can cause seizures. In fact, after some brief, inconclusive studies on cognition enhancement in elderly or mentally impaired people in the 1950s, PTZ has been primarily used for the study o...

Sleep disturbances affect classroom performance

... the phone or play cards in bed. Do not have any caffeine after lunch. Do not go to bed hungry, but don’t eat a big meal before bedtime either. Avoid any rigorous exercise within six hours of your bedtime. Try to get rid of or deal with things that make you worry. Make your bedroom quiet, dark and a...