(n.) A white, bitter, crystallizable substance, obtained from coffee. It is identical with the alkaloid theine from tea leaves, and with guaranine from guarana.
Example Sentences:
(1) Blood was collected from pups and dams to determine its caffeine concentration.
(2) When caffeine evokes a contraction, and only then, crayfish muscle fibers become refractory to a second challenge with caffeine for up to 20 min in the standard saline (5 mM K(o)).
(3) As expected, chronic administration led to complete tolerance to caffeine's locomotor stimulant effect, while subchronic administration produced sensitization.
(4) Caffeine and 6-methylaminopurine riboside (6-N-methyladenosine differentially inhibit uptake of radioactivity from adenosine and inosine, and thus the vesicles apparently possess seperate transport systems for uptake of radioactivity from purine nucleosides and from uridine.
(5) The inositol 1,4,5-trisphosphate (IP3) binding inhibitor, heparin, has no effect on ryanodine binding, and ryanodine and caffeine do not influence the binding of [3H]IP3, which is enriched in the cerebellar fractions.
(6) Post-labeling addition of 1 mM caffeine increased perpetuated blocks to a frequency of about 10% of the initial number of dimers in 4 h in XP16KO-II cells, but not in XP16KO-I and normal cells.
(7) Thus, in human lymphocytes the frequencies of chromatid aberrations induced by most clastogenic agents were strongly enhanced when caffeine was given during the G2 phase, but little affected by post-treatments with caffeine during the S phase.
(8) The Na(+)-induced Ca++ release from the sarcolemmal vesicles was stimulated with caffeine in a concentration-dependent manner; about 80% increase in the activity was observed at 0.1 mM caffeine.
(9) All other dietary constituents, such as protein, fiber, fluid, minerals (including Ca, Mg, Na, K, and P), and caffeine intake, were kept constant.
(10) All calcium, magnesium, and zinc contents per bone decreased in the 1- and 2-mg caffeine groups as compared to either controls or 0.5-mg caffeine group, whereas phosphorus stayed relatively constant regardless of the different levels of caffeine intake.
(11) In the presence of agents that inhibit sarcoplasmic reticulum (SR) function (10 mM caffeine, 100-500 nM ryanodine), reduction of the [Na] gradient produced increases in contractile force similar to that observed in the absence of caffeine or ryanodine.
(12) On the basis of these findings, it is suggested that screening for malignant hyperpyrexia by in vitro pharmacological testing of skeletal muscle should be carried out at 37 degrees C, and should include exposure of the sample to halothane, caffeine, suxamethonium and potassium rather than to halothane alone.
(13) The mechanism responsible for the potentiated anti-inflammatory and mild analgesic activity of aspirin remains unknown since caffeine did not alter the plasma salicylate levels or prostaglandin synthetase inhibition produced by aspirin.
(14) Their pups continued to consume the caffeine diet until 50 days.
(15) The pups were divided into caffeine and noncaffeine groups.
(16) In this study, eight patients participated in a standardized protocol to assess the effects of caffeine on seizures in ECT.
(17) These patients may have an increased risk of cardiovascular and cerebral excitation associated with higher concentrations of caffeine, which could complicate withdrawal from alcohol.
(18) were elevated significantly (P less than 0.05 at 0.3, 0.6 and 1 h after injection) when caffeine 5 or 10 mg kg-1 i.v.
(19) This study supports the findings of others in that caffeine restriction is an effective means of management of breast pain associated with fibrocystic disease.
(20) Aminophylline and caffeine can mimic this effect; however, papaverine and 1-methyl-3-isobutylxanthine, at concentrations inhibitory to phosphodiesterase, are without effect on glucocorticoid receptor binding to DNA.
Tea
Definition:
(n.) The prepared leaves of a shrub, or small tree (Thea, / Camellia, Chinensis). The shrub is a native of China, but has been introduced to some extent into some other countries.
(n.) A decoction or infusion of tea leaves in boiling water; as, tea is a common beverage.
(n.) Any infusion or decoction, especially when made of the dried leaves of plants; as, sage tea; chamomile tea; catnip tea.
(n.) The evening meal, at which tea is usually served; supper.
(v. i.) To take or drink tea.
Example Sentences:
(1) The outward currents are sensitive to TEA and their reversal potentials differ.
(2) As prolongation of the action potential by TEA facilitates preferentially the hormone release evoked by low (ineffective) frequencies, it is suggested that a frequency-dependent broadening of action potentials which reportedly occurs on neurosecretory neurones may play an important role in the frequency-dependent facilitation of hormone release from the rat neurohypophysis.
(3) In contrast, the fast block by internal TEA+ appeared virtually independent of voltage.
(4) In conclusion, block of inhibitory innervation, and induction of electrical slow waves as a control mechanism for phasic contractile activity, seems to require blockade of an aminacrine- but not TEA-sensitive potassium conductance.
(5) And it means the Foreign Office dealing with those in the Middle East and North Africa who are on the side of democracy and human rights, not sitting down to tea with torturers.
(6) The Tea Party movement has turned climate denial into a litmus test of conservative credentials – and that has made climate change one of the most sharp divisions between Obama and Romney.
(7) The addition of chlorhexidine and saliva increased staining when used with tea.
(8) Results with the model strengthen the hypothesis that tetraethylammonium (TEA) acts on both the maximum potassium conductance (gK) and the mechanism of sodium conductance inactivation (Tauh) to lengthen the action potential as observed on the Ranvier node (fig.
(9) Sources said that when Mitchell toured the Commons tea rooms on Wednesday and Thursday, he was taken aback by the opposition to him staying put, despite Cameron's support.
(10) The Vitter amendment is popular with the Tea Party, which takes it to be an accountability measure.
(11) You literally never see that at political rallies, though obviously at Tea Party ones they are there all the time."
(12) The acidosis-saving property of TEA is favorable for the ischemic heart.
(13) The council offered him a tea urn | Frances Ryan Read more Government attempts to decrease the disproportionately high levels of unemployment among disabled people have had little impact, the report notes, while notorious “fit-for-work” tests were riven with flaws.
(14) 8.04pm BST First challenge for the remaining seven is the tea loaf.
(15) While you can buy commercial formulations, I have always found that tap water, a cup of strong black tea, and some lemon juice provide enough nutrients for a lovely fermentation.
(16) Up-and-coming Tea Party favourite Ted Cruz issued a similar statementon Friday after the wave of disclosures, saying he would work with "colleagues in the Senate who share my concerns to ensure that we have all the facts about these surveillance programs".
(17) Litvinenko died aged 43 after drinking tea laced with radioactive polonium-210 at a meeting with two Russian men at the Millennium hotel in Grosvenor Square, London, in November 2006.
(18) The Norwegian researchers looked at all the sources of caffeine ingested by the pregnant women, including coffee, tea and fizzy drinks, along with cakes and desserts containing cocoa (which has lots of caffeine).
(19) Currents through both the voltage-activated potassium channels, IK,V, and the calcium-activated potassium channels, IK,Ca, can be blocked by the membrane-impermeant K channel blocker tetraethylammonium (TEA).
(20) Replacement of sodium by tetraethylammonium (TEA) did not reduce the slow inward tail current, nor change its reversal potential.