(a.) Having the power or quality of acting; causing change; communicating action or motion; acting; -- opposed to passive, that receives; as, certain active principles; the powers of the mind.
(a.) Quick in physical movement; of an agile and vigorous body; nimble; as, an active child or animal.
(a.) In action; actually proceeding; working; in force; -- opposed to quiescent, dormant, or extinct; as, active laws; active hostilities; an active volcano.
(a.) Given to action; constantly engaged in action; energetic; diligent; busy; -- opposed to dull, sluggish, indolent, or inert; as, an active man of business; active mind; active zeal.
(a.) Requiring or implying action or exertion; -- opposed to sedentary or to tranquil; as, active employment or service; active scenes.
(a.) Given to action rather than contemplation; practical; operative; -- opposed to speculative or theoretical; as, an active rather than a speculative statesman.
(a.) Brisk; lively; as, an active demand for corn.
(a.) Implying or producing rapid action; as, an active disease; an active remedy.
(a.) Applied to a form of the verb; -- opposed to passive. See Active voice, under Voice.
(a.) Applied to verbs which assert that the subject acts upon or affects something else; transitive.
(a.) Applied to all verbs that express action as distinct from mere existence or state.
Example Sentences:
(1) Tryptic digestion of the membranes caused complete disappearance of the binding activity, but heat-treatment for 5 min at 70 degrees C caused only 40% loss of activity.
(2) A study revealed that the percentage of active sperm in semen 30 seconds after ejaculation was 10.3% when a nonoxynol 9 latex condom was used as opposed to 55.9% in a nonspermicidal condom.
(3) The most actively proliferating region of the excurrent duct system is zone 3 of the epididymis, whereas the least active region is the ductuli efferentes.
(4) Spectral analysis of spontaneous heart rate fluctuations, a powerful noninvasive tool for quantifying autonomic nervous system activity, was assessed in Xenopus Laevis, intact or spinalized, at different temperatures and by use of pharmacological tools.
(5) Activity of Na,K-ATPase activity was measured as a functional marker for synaptosomal membranes.
(6) The antiarrhythmic activity similar to that of quinidine (with ca.
(7) The microsomal preparations from untreated Syrian golden hamster livers exhibited higher activities of N-demethylation towards the macrolide antibiotics, erythromycin and troleandomycin, than those from untreated and phenobarbital-treated rats.
(8) Patient plasma samples demonstrated evidence of marked complement activation, with 3-fold elevations of C3a desArg concentrations by the 8th day of therapy.
(9) After stimulation with lipopolysaccharide and calcium ionophore A23187, culture supernatants of clones c18A and c29A showed cytotoxic activity against human melanoma A375 Met-Mix and other cell lines which were resistant to the tumor necrosis factor, lymphotoxin and interleukin 1.
(10) Phospholipid methylation in human EGMs is distinctly different from that in rat EGMs (Hirata and Axelrod 1980) in that the human activity is not Mg++-dependent, and apparent methyltransferase I activity is located in the external membrane surface.
(11) Increased plasmin activity was associated with advancing stage of lactation and older cows after appropriate adjustments were made for the effects of milk yield and SCC.
(12) Arachidic acid was without effect, while linoleic acid and linolenic acid were (on a concentration basis) at least 5-times less active than arachidonic acid.
(13) Following in vitro C activation in NHS by delta IgG, the 40 KD C4d component increased markedly.
(14) One hour after direct mechanical cardiomassage (DMCM) a moderately pronounced edema of the intercellular spaces in the basal compartment of the seminiferous epithelium, normal content of lactate and succinate dehydrogenases, and a certain decrease in the activity of glucose-6-phosphate dehydrogenases and NAD- and NADP-diaphorases were noted.
(15) We conclude that first-transit and blood-pool techniques are equally accurate methods for determining EF when the time-activity method of analysis is employed.
(16) This difference was not due to ATPase activity in the assay.
(17) In the surface epithelial cells, the basolateral cell surface showed moderate enzymatic activity.
(18) Both the vitellogenesis and the GtH cell activity are restored in the fish exposed to short photoperiod if it is followed by a long photoperiod.
(19) It was shown in experiments on four dogs by the conditioned method that the period of recovery of conditioned activity after one hour ether anaesthesia tested 7 to 7.5 days.
(20) Together these results suggest that IVC may operate as a selective activator of calpain both in the cytosol and at the membrane level; in the latter case in synergism with the activation induced by association of the proteinase to the cell membrane.
Quiescent
Definition:
(a.) Being in a state of repose; at rest; still; not moving; as, a quiescent body or fluid.
(a.) Not ruffed with passion; unagitated; not in action; not excited; quiet; dormant; resting.
(a.) Not sounded; silent; as, y is quiescent in "day" and "say."
(n.) A silent letter.
Example Sentences:
(1) The ability of cytoplasmic extracts to induce DNA synthesis in isolated, quiescent nuclei.
(2) The study of cellular cyclic AMP level in response to extracellular adenosine stimulation in dividing cells and quiescent cells showed that cells in defined medium had a lower extent of response to adenosine compared to cells cultured in serum-containing medium.
(3) The rate of nuclei stained by Pr-122 is different from that of Pr-192 in both growing and quiescent cultures.
(4) Proliferation of quiescent hematopoietic stem cells, purified by cell sorting and evaluated by spleen colony assay (CFU-S), was investigated by measuring the total cell number and CFU-S content and the DNA histogram at 20 and 48 hours of liquid culture.
(5) By this action, oxytocin is believed to increase the probability of successful regenerative spikes and thereby initiate electrical activity in quiescent preparations, increase the frequency of burst discharges, the number of spikes in each burst, and the amplitude of spikes in individual cells.
(6) We have previously shown that a spontaneous mutant of MH2 (PA200-MH2), expressing only the v-mil oncogene, is able to induce proliferation of quiescent neuroretina cells.
(7) When 5 corneas with quiescent HSK were cultured in vitro, 3 again became HSV antigen positive.
(8) The cells considered intact were quiescent in the presence of 2.5 mM free Ca2+ but responded to an electrical stimulation by an homogeneous and brief contraction.
(9) PI-3-P was detected in quiescent SMC and increased only slightly in response to PDGF.
(10) Nuclei were isolated from proliferative or quiescent cells and then treated with drug for 30 min.
(11) The increase in Con A fiber-binding seems to be specific for EGF, since it was not observed in response to insulin, prostaglandin F2alpha or a higher serum concentration, which also initiate cell devision of confluent quiescent 3T3 cells.
(12) After suspension of distension, arterial and venous flow and oxygen saturation increased beyond the quiescent level.
(13) New results from our laboratory are included to demonstrate that RVD is modulated by both temperature and pH, and that RVD occurs in proliferating as well as quiescent lymphocytes.
(14) A model for IL 2 proliferation was derived on the basis of the two-state model of the cell cycle, with cells leaving a quiescent state randomly and then traversing the other stages of the cell cycle in a determinate way.
(15) These data suggest that thymic hormone target cells include small quiescent lymphocytes.
(16) Aspirin and indomethacine were shown to decrease intracellular pH of quiescent neutrophil cells.
(17) De novo synthesis of adenine nucleotide was measured in quiescent and contracting muscle of sedentary and exercise-trained rats using an isolated perfused hindquarter preparation.
(18) The B subunit of cholera toxin, which binds specifically to several molecules of ganglioside galactosyl-(beta 1----3)-N-acetylgalactosyminyl(beta 1----4)-[N- acetylneuraminyl(alpha 2----3)]-galactosyl(beta 1----4)glucosyl(beta 1----1) ceramide (GM1) on the cell surface, stimulated DNA synthesis and cell division in quiescent, nontransformed mouse 3T3 cells in a dose-dependent manner.
(19) Stimulation of membrane ruffling is one of the first events induced by addition of growth factors to quiescent cultures.
(20) Recovery of enzyme was much more rapid in confluent quiescent monolayers of endothelial cells than in dividing cultures.