Theine

The leaves yield the same bitter principle called theine, which is found in the leaf of the Chinese tea-plant, the coffee berry, &c. ❋ P. L. Simmonds (N/A)

The active principle of tea is called theine; that of coffee, caffeine, and of cocoa, theobromine. ❋ Albert F. Blaisdell (N/A)

The chemical principle of tea, namely theine, was subsequently tried and produced no effect. ❋ Charles Darwin (1845)

Tea is often drunk at social events, especially early in the day to heighten alertness — it contains theophylline and bound caffeine (sometimes called "theine"), although there are also decaffeinated teas. ❋ Unknown (1995)

They were suffering, in fact, from "theine" poisoning. ❋ Alfred Arthur Reade (N/A)

It also exists in tea, formerly known as "theine" which is now known to be identical with caffeine; both are expressed by the formula ❋ Jerome Beers Thomas (1891)

Personally, I have noted different effects from caffeine vs. theine (or even mateine), and though there is no scientific evidence for this (that I could find), it may be due to other compounds in the liquid. ❋ Unknown (2007)

Red tea is referring to rooibos tea – the sweet tasting South African bush, used as a superior, in my opinion substitute to black tea – less the theine. ❋ Ayala Sender (2006)

It was claimed for this special model that it extracted only the theine, and not the tannin from the tea. ❋ Unknown (2004)

The first of these is caffeine, which is almost identical in composition with, and practically the same as, the theine present in tea. ❋ Unknown (2004)

Of the two, cacao contains the larger quantity of nitrogen; and this chemical fact explains why cacao should be so much more nutritive than tea, though the principle of tea (theine) is nearly identical with the principle of cacoa -- tea containing in 100 parts 29.009 of nitrogen. ❋ P. L. Simmonds (N/A)

With regard to the identity of theine, caffeine, theobromine, ❋ P. L. Simmonds (N/A)

Now this quantity is contained in 0.6 parts of theine, or 2 grains 8/10ths of theine can give to an ounce of bile the nitrogen it contains in the form of taurine. ❋ P. L. Simmonds (N/A)

Liebig says, without entering minutely into the medical action of caffeine, theine, &c., it will surely appear a most striking fact, even if we were to deny its influence on the process of secretion, that the substance, with the addition of oxygen and the elements of water, can yield taurine, the nitrogenised compound peculiar to bile: -- ❋ P. L. Simmonds (N/A)

Although an infusion of tea contains no more than the one-tenth of a grain of theine, still, if it contribute in point of fact to the formation of bile, the action even of such a quantity cannot be looked upon as a nullity. ❋ P. L. Simmonds (N/A)

There are also present in tea an alkaloid, theine, which gives the peculiar physiological properties, and tannin, upon which depends largely the strength of the tea infusion. ❋ Harry Snyder (N/A)

An average cocoa contains about 20 per cent of proteids, and 30 per cent fat, also starch, sugar, gums, fiber, and ash, as well as theobromine, a material very similar to theine and caffein in tea and coffee, but not such an active stimulant. ❋ Harry Snyder (N/A)

The caffein or theine in tea is an alkaloid that has characteristic physiological properties. ❋ Harry Snyder (N/A)

The quantity of theine consumed in a cup of tea is about 4/5 of a grain, or ❋ Harry Snyder (N/A)

-- Tea and coffee contain an alkaloid theine, besides volatile oils, tannin, &c. ❋ A. W. Duncan (N/A)

[Yesterday night] i was studying in [the library] and i had to do [the dirty] thein! ❋ Gotm_oof (2017)

I had [a Dirty] Thein with [Jessica] last night and was [full] by the end of it. ❋ Adions (2022)

Ben thein is so Ben thein ❋ Poopoopeepee123 (2022)