Caffeine is more soluble in methylene chloride than in acetone. Methylene chloride is a non-polar solvent, while caffeine is a polar compound. Polar compounds like caffeine tend to be more soluble in non-polar solvents like methylene chloride.
adenosine
Caffeine blocks adenosine receptors in the brain, preventing adenosine from binding to them. This leads to increased alertness and reduced feelings of tiredness.
Sugar is more soluble in water than caffeine. Sugar molecules are polar and can form hydrogen bonds with water molecules, allowing them to dissolve easily. Caffeine is less soluble in water due to its nonpolar nature, making it less likely to interact with water molecules.
Caffeine is soluble in water - but not HIGHLY soluble. You can dissolve a lot more caffeine in the same volume of water compared to what will dissolve in an equal volume of acetone. It dissolves better in hot acetone than in cold acetone.
Yes, by blocking adenosine receptors (adenosine stimulates wound healing).
Adenosine receptors can be blocked without using caffeine by using specific medications or compounds that target these receptors. These medications work by binding to the receptors and preventing adenosine from attaching to them, thus blocking their effects.
Caffeine can make you hyper because it blocks the adenosine receptor in the brain. Caffeine increases your own natural stimulant.
The primary receptor for caffeine on the cell membrane is the adenosine receptor. Caffeine acts as a non selective antagonist at the A1 and A2A receptors, so it has the opposite effect of adenosine, acting as a stimulant and increasing heart rate.
There are obvious negative effects of sugar, but really only on the heart. Your brain on sugar is much more hyper active. Your neurons fire faster, and cause messages to be sent quicker. The reason there is a crash after eating a lot of sugar is because of a waste product of your neurons firing. The waste product is called Adenosine. Caffeine works by inhibiting Adenosine receptors which cause you to sleep. If you take sugar and caffeine together, you get hyper, with a slower crash rate than if you just had sugar. You can find out more about all of these things (sugar, caffeine, and adenosine) on sites like wikipedia, or more trustworthy sites...
Adenosine receptors stick through the neuron membrane, so that part of them are on the inside and part is on the outside of the cell. Now, when adenosine, a natural chemical in the body, attaches to the adenosine receptor it shifts the shape of the receptor, this shift reaches all the way to the part on the inside of the cell, and causes the receptor to release attached molecules called G-proteins. These g-proteins now float around the inside of the cell and have all sorts of effects, in this case, to inhibit the neuron. Caffeine also binds to the adenosine receptor, but it doesn't activate the receptor. This means that the receptor is totally shut down, and can't work to inhibit the neuron any more. The end effect is to allow the neuron to be more active than it was before the caffeine.
Yes, caffeine is soluble in ethanol. Caffeine, being a polar molecule, can dissolve in polar solvents like ethanol, which facilitates its extraction in various applications. This solubility is one reason why caffeine can be effectively extracted from coffee and tea using alcoholic solvents.