Caffeine Definition and 30 Threads

Most of what I'm going off is from this article here - https://www.sciencedirect.com/science/article/pii/S0187893X15720926#bib0115. This presents methyl iodide as safer than dimethyl sulphate, which is true and helpful, but not safe enough for me to be able to use it at school. I understand its...

Hello everyone, I have been trying to dissolve caffeine in water for a few days now. I am trying to dissolve approx. 500mg of caffeine in approx. 10ml of water, but I am encountering the problem that the solution turns into a paste. If I heat the water beforehand, the caffeine dissolves well at...

Yes, I know I should consult with my doctor (and plan to). Nonetheless, I'm wondering: a.) How common is it for someone to need caffeine to get alert? b.) If it is practically daily, does that seem problematic? For me, being alert and not feeling tired certainly varies with sleep. Less...

I noticed that different brands of espresso coffee have different effect on my nervous system. Some are really good in the sense that they wake me up and make me feel fresh and dynamic, while others do nothing, and others make me really jumpy and nervous and stressed. Why is that? I am not good...

Hello Why polyphenols make caffeine (from tea) work slower than caffeine from coffee? Thank you for your time. Regards, ORF

hello folks what can neutralize caffeine in human body ? thank you very much

Hello guys, I once again come to ask of a concern that has been worrying me for some time. Last semester as I took much lighter coursework, I had the luxury of having a lot of time to figure problems out, and only consumed a can of energy drink before tests for the assurance. I felt that I was...

I would like to know how many geniuses didnt drink caffeine in a daily basis if any when they did their major work? Or current geniuses? Ive heard rumours that Tesla didnt drink coffee after realizing it affected his imagination, but I don't know if he continued drinking it later on. I read...

Pubchem says the BP of caffine is 178 deg C (sublimes) and the melting point is 236.2 deg C. Below is the only phase diagram I found for caffeine. Aren't the MP and BP measured at 1 atm? If so according to this phase diagram it shouldn't sublimate correct? Assuming the phase diagram is wrong...

Scientists studying obesity have had great interest in brown fat, adipose tissue that actually helps burn fat (for example, to generate body heat in the cold). Studies suggest that higher levels of brown fat correlate with lowered risks for obesity and diabetes, and scientists are studying...

If the concentration of caffeine in a system at any given time is given by the equation y(t)=De^-kt where dy/dt=-kt is the clearence rate (re-arranged and integrated to form the above equation) and the concentration of caffeine in the system at t=0 is D, then calculate k if: After one hour...

Hi, The formula of caffeine is C8H10N4O2. The oxidation numbers of O & H are -2 & +1 according to the book. How do I determine the oxidation numbers of C or N. Note: The substance is a molecular substance so we cannot apply the following rule: "the oxidation number of an atom in a monatomic...

Evening all, I've been curious about these caffeine soaps lately and thought that this would be the place to discuss about it. My almost-favorite website United Nuclear claims: "As it turns out, our good old friend Caffeine reaches the bloodstream faster through skin absorption...

So, I've extracted a small amount of (hopefully) caffeine from coffee via solvent extraction with hexane. Quick note before i go on, I know that this is possibly not the best method - however I am trying to determine the best method of caffeine extraction via experiment. Anyways, to...

Homework Statement Caffeine, a stimulant found in coffee, tea, chocolate, and some medications, contains 49.48% carbon, 5.15% hydrogen, 28.87% nitrogen, and 16.49% oxygen by mass and has a molar mass of 194.2. Homework Equations Determine the molecular formula of caffeine. The...

We did an experiment (link provided below), where we were to determine the concentration of caffeine in Mountain Dew. We made 3 standards and measured their absorbance along with the unknown (the mountain dew sample) and we graphed these results to find the concentration of caffeine in Mountain...

do caffeine and nicotine have the same on the brain? if not, how do they differ?

I must admit, that this surprised me. I you're wrecked on meth or cocaine and kill someone, its still murder,m but somehow this is a defense being offered in a court of law: http://news.blogs.cnn.com/2010/09/20/murder-defense-too-much-caffeine/?hpt=T2 Twinkie defense, meet Caffeine (and sleep...

I know that Caffeine gives a boost in the amount of Beta-Waves in the brain, but what does it do to the Synchronicity of brainwaves between the 2 Hemispheres? It's well known that a brain with higher synchronicity is more efficient than a brain with uneven brainwave synchronicity... Since...

Hello everyone :smile: Is there any special effect of Caffeine on Squirrels ? with reference to Hoodwinked & Over the hedge (Animated Cartoons) In these animated cartoons, squirrels get super-fast by drinking coffee! Is this really true?

Homework Statement What is the Empirical and Molecular Formula of caffeine, given these information: 0.376g caffeine would yield to 0.682 CO2 , 0.174g H2O and 0.110g N. The molecular weight if caffeine is 194 g/mole. Homework Equations --- The Attempt at a Solution 0.682 CO2...

Homework Statement what are the types of methods to use to remove caffeine? Homework Equations The Attempt at a Solution column chromatography, distillation, Solid phase extraction and Tlc chromatography

Why caffeine has 178 oC as point of sublimation but 237 oC as melting point? Is it about the pressure? If so, then what is the preesure that makes 237 as melting point instead of sublimation at 178 oC? Cuz the science websites always just said 237 is the melting point, but didn't mention the...

1. Homework Statement Calculate the pH of a solution made by dissolving 10.6 g caffeine (C8H10N4O2, a weak base, Kb = 4.1 x 10-4) in enough water to make 100. mL of solution. Homework Equations pH = -log [H3O+] kb = kw/ka The Attempt at a Solution I first found conc.: MM=...

...for the addicts among us? I remember back in the early nineties there were what was called "pick-ups", or caffeine pills supposedly used by students, in order to ingest a lot of caffeine. Do such pills still exist? Has anyone thought of adding caffeine to orange juice or any other...

I found this on the internet and was wondering if there was an easier way to extract the caffeine from coffee because this takes more time and equipment than i care to use is there any way i could do this at room pressure because last time i worked with pressurized stuff a seal broke and it shot...

Well to begin I should say that I used to be a caffeine freak. I averaged 2L of Diet Dr Pepper everyday for the past four years. About three weeks ago I ran out of pop and, being extremely busy with college, I was unable to get to the grocery store for anything other than a few bags of food...

lo all, i´m having a small prob here -extract the caffein of the tea leaves with CH2Cl2 + NaOH - after the liquid-liquid extraction the organic phase (that contains the caffeine) was evaporated. then i joined some hot "toluen" (C6H5CH3) to the caffeine to occur a cristalization by slow...

I have a sample of 25 % acetanilide with 75 % caffeine. I record a melting point range of 198 - 240 degrees celcius acetanilide's melting point is 114.3 caffeine's melting point is 238 What would cause this huge experimental range? My thinking is that the acetanilide is...

Hello. I was just at the super market, and i saw a drink which is supposed to give you "energy". It is called "Power Horse". Although it is very expensive (imported from Austria), i decided to buy it. Now, i don't really like the idea of drink that gives energy, therefore i suspected in its...