(a.) Acting; -- opposed to patient, or sustaining, action.
(n.) One who exerts power, or has the power to act; an actor.
(n.) One who acts for, or in the place of, another, by authority from him; one intrusted with the business of another; a substitute; a deputy; a factor.
(n.) An active power or cause; that which has the power to produce an effect; as, a physical, chemical, or medicinal agent; as, heat is a powerful agent.
Example Sentences:
(1) Combinations of maximum amounts of glucagon and the cyclic nucleotide did not produce a greater effect than either agent alone.
(2) Assessment of the likelihood of replication in humans has included in vitro exposure of human cells to the potential pesticidal agent.
(3) In addition, intravenous injection of complexes into rabbits showed optimal myocardial images with agents of intermediate lipophilicity.
(4) This study examined the [3H]5-HT-releasing properties of 3,4-methylenedioxymethamphetamine (MDMA) and related agents, all of which cause significant release of [3H]5-HT from rat brain synaptosomes.
(5) The quaternary structure of ribonucleotide reductase of Escherichia coli was investigated, with the use of purified B1 and B2 proteins and bifunctional cross-linking agents.
(6) Rapid overgrowth of all cultures with the E. coli necessitated the use of selective media containing antimicrobial agents to which the E. coli was sensitive.
(7) These membrane perturbation effects not observed with bleomycin-iron in the presence of a hydroxyl radical scavenger, dimethyl thiourea, or a chelating agent, desferrioxamine, were correlated with the ability of the complex to generate highly reactive oxygen species.
(8) of PLA2 caused marked degranulation of mast cells in the rat mesentery which was facilitated by addition of calcium ion (10 mM) but antagonized by pretreating with three antiinflammatory agents.
(9) We report a series of experiments designed to determine if agents and conditions that have been reported to alter sodium reabsorption, Na-K-ATPase activity or cellular structure in the rat distal nephron might also regulate the density or affinity of binding of 3H-metolazone to the putative thiazide receptor in the distal nephron.
(10) Acquired drug resistance to INH, RMP, and EMB can be demonstrated in M. kansasii, and SMX in combination with other agents chosen on the basis of MIC determinations are effective in the treatment of disease caused by RMP-resistant M. kansasii.
(11) The secondary leukemia that occurred in these patients could be distinguished from the secondary leukemia that occurs after treatment with alkylating agents by the following: a shorter latency period; a predominance of monocytic or myelomonocytic features; and frequent cytogenetic abnormalities involving 11q23.
(12) The agent present in the serum which causes dissolution of the fibrin clot was isolated and identified as pepsinogen.
(13) The active agents modestly improved treadmill exercise duration time until 1 mm ST segment depression (3%), and only propranolol and diltiazem had significant effects.
(14) Maximal covalent binding of [4,5-14C]ronidazole to DNA also required four-electron reduction, consistent with previous studies of the covalent binding of this agent to immobilized sulfhydryl groups [Kedderis et al.
(15) Since interferon alfa-2b (Intron A) is useful as a single agent, it is important to determine if interferon can be combined with standard chemotherapy to improve both response and survival in patients with cancer.
(16) Median effect analysis was applied for the evaluation of in vitro effect by the growth inhibition, and the in vivo effect by comparison of the increase of life span (ILS) in a combined group with the sum of ILS's in 2 single agent groups.
(17) Noradrenaline (NA) was released from sympathetic nerve endings in the tissue by electrical stimulation of the mesenteric nerves or by the indirect sympathomimetic agent tyramine.
(18) Helsby, who joined the estate agent in 1980, saw his basic salary unchanged at £225,000, but gains a £610,000 windfall in shares, available from May, as well as a £363,000 increase in cash and shares under the company profits-sharing scheme.
(19) Combining maximally effective concentrations of each of these stimulating agents produces an additive increase in both the level of 32P incorporation into tyrosine hydroxylase and the degree of activation of the enzyme.
(20) The review provides an update of drug-induced pulmonary disorders, focusing on newer agents whose effects on the lung have been studied recently.
Peptic
Definition:
(a.) Relating to digestion; promoting digestion; digestive; as, peptic sauces.
(a.) Able to digest.
(a.) Pertaining to pepsin; resembling pepsin in its power of digesting or dissolving albuminous matter; containing or yielding pepsin, or a body of like properties; as, the peptic glands.
(n.) An agent that promotes digestion.
(n.) The digestive organs.
Example Sentences:
(1) Useful studies on the relationship between these acute lesions and peptic ulceration are rare.
(2) The pathomechanism, how C. pylori facilitates the development of peptic ulcer is since hypothetical.
(3) A prospective randomized trial involving 64 patients with bleeding peptic ulcers was performed to assess the efficacy of two modalities of injection therapy.
(4) The results of a prospective inquiry into the aspirin taking habits of a consecutive series of 118 patients admitted to a large general hospital with acute perforation of peptic ulcer are presented.
(5) All of them had a history of nephrolithiasis and peptic ulcers.
(6) Pain relieved by antacids, age above 40 years, previous peptic ulcer disease, male sex, symptoms provoked by berries, and night pain relieved by antacids and food were found to predict organic dyspepsia with a sensitivity and specificity of approximately 70%, when applied on the observed material.
(7) Prostaglandin analogues, because of their oral effectiveness and duration of action, may have therapeutic value in peptic ulcer disease.
(8) Oral administration of PGE methyl analogues may be an effective mode of therapy in peptic ulcer disease.
(9) Results of medical therapy of reflux oesophagitis are disappointing, especially compared to the success obtained in peptic ulcer disease.
(10) Smoking, which predisposes to peptic ulceration, also appears to reduce mucosal prostaglandin synthesis.
(11) The family physician who sees many children with vague abdominal pain must include peptic ulcer disease in the differential diagnosis.
(12) The tumour produced insulin and gastrin with resulting hypoglycaemia and recurrent peptic ulceration which were unresponsive to other drugs.
(13) The results of 96 simultaneous operations for peptic ulcer are discussed.
(14) Important problems currently under study or requiring investigation for better understanding of the pathophysiology and management are reviewed under three major categories: acute peptic erosions and ulcers, gastric ulcer, and duodenal ulcer.
(15) Although uncommon in children peptic ulcers should be considered in patients with recurrent abdominal pain.
(16) Persistent reflux causing cycles of mucosal damage followed by healing may eventually lead to end-stage disease, with development of peptic stricture.
(17) Omeprazole 40 mg therefore was found to produce rapid healing and symptom relief in Asian patients with H2-antagonist-resistant peptic ulcers.
(18) Evidence is provided for the concept of enlarged spasms (phenomenon of the spastic dominant) common to peptic ulcer.
(19) Peptic ulcers were identified in 14 patients, mostly those with new dyspepsia, during the study period.
(20) The serum hCGLS levels in 54 patients with gastrointestinal cancer were significantly higher, when compared with the findings in 19 healthy volunteers and 10 peptic ulcer patients.