(a.) Added extrinsically; not essentially inherent; accidental or causal; additional; supervenient; foreign.
(a.) Out of the proper or usual place; as, adventitious buds or roots.
(a.) Accidentally or sparingly spontaneous in a country or district; not fully naturalized; adventive; -- applied to foreign plants.
(a.) Acquired, as diseases; accidental.
Example Sentences:
(1) Several in vitro transcripts both larger and smaller than the authentic transcript were seen; presumably, these transcripts result from adventitious promoterlike elements in adjacent chlamydial DNA and may be responsible for the expression of the gene in E. coli.
(2) Initial acceleration of the DRL responding appeared to be due to adventitious punishment of collateral behavior which was observed between the bar-presses.
(3) These findings suggest that adventitial mast cells may potentiate atherosclerosis and vasospasm, thrombosis and premature sudden death in long-term cocaine abusers.
(4) By studying the kinetics of urease-catalyzed urea hydrolysis during application of hydrodynamic shear under varying chemical environments, we demonstrate that micromolar quantities of metal ions, in this case adventitious Fe, can accelerate the oxidation of thiol groups on urease and thus inactivate it when the protein is subjected to a shearing stress of order 1.0 Pa.
(5) A marked reduction in the area covered by adventitial cells was recorded coinciding with the early reticulocyte response to phlebotomy.
(6) The use of established genetically engineered cultures in the production of biologicals for human use requires that these cultures be monitored for adventitious viral agents.
(7) 11.30am: Those playing "Leveson bingo" with Robert Jay QC 's florid language might like to note that he has so far used the word "adventitious" .
(8) The extent of marrow sinus wall coverage by perisinal adventitial cells was measured before and after removing 25% of the calculated blood volume in rabbits.
(9) Endothelial damage reduced sensitivity and response asymmetry to luminal and adventitial adenosine.
(10) The invention in 1819 of the stethoscope by Laënnec was followed by the first classification of pulmonary adventitial sounds.
(11) The soaked embryonic shoots formed new apical buds, with or without bud scales, adventitious dwarf needles or shoots, and root- and embryo-like structures.
(12) The histological findings failed to reveal significant differences in either thoracic or abdominal aneurysms with or without marked adventitial fibrosis.
(13) The greatest amount of nerves at all stages of human development occurs in the adventitial plexuses of the thyroid arteries; they are less numerous in the plexus of the splenic artery, and their minimal amount is noted in the plexus of the brachial artery.
(14) In method 2, 72% of the balloon-denuded patent arteries with intact adventitial vasa vasorum were partially re-endothelialized at 4 weeks and 84% at 8 weeks.
(15) This uptake appears to occur primarily in the muscle layers adjacent to the lumen, suggesting that the muscle cells of the luminal side function differently from those from the adventitial side.
(16) Adventitious effects, purposeful lenticular changes and adaptations in response to environmental forces are reviewed as possible sources of this astigmatic variability.
(17) The porphyrins have two important roles in photobiology: in photosynthesis, which has evolved and is highly organized morphologically; and in the photodynamic effect, which is adventitious.
(18) Intimal hyperplasia was observed in both groups, but the grafts in the hypertensive groups showed increased adventitial and medial fibrosis and a reduced number of vasa vasora.
(19) It was found that: the average maximum residual intimal engineering strain in the uncut configuration was -0.082 for all nine aortas and -0.096 and -0.077 for the bovine and porcine aortas alone, respectively; the average maximum residual adventitial strain was 0.085 for all aortas, and 0.102 and 0.078 for the bovine and porcine aortas alone, respectively; an estimated average beneficial compressive stress of -0.188 X 10(5) Pa (corresponding to a strain level of -0.082) is available at the intimal level to counteract the in vivo tensile stress due to the intravascular pressure; an estimated average initial tensile stress of 0.195 X 10(5) Pa (corresponding to a strain level of 0.085) exists at the adventitial level which adds to the in vivo tensile stress due to the intravascular pressure.
(20) Fluorescence histochemistry shows that helicine arteries are provided with an extremely dense network of adrenergic nerves located at the medio-adventitial border.
Adventive
Definition:
(a.) Accidental.
(a.) Adventitious.
(n.) A thing or person coming from without; an immigrant.
Example Sentences:
(1) Finally, before the advent of the third-party payment, operations were avoided because of the financial burden.
(2) "With the advent of sophisticated data-processing capabilities (including big data), the big number-crunchers can detect, model and counter all manner of online activities just by detecting the behavioural patterns they see in the data and adjusting their tactics accordingly.
(3) The advent of transgenic technology, in which foreign genetic information is stably introduced into the mammalian germ line, has dramatically enhanced our basic knowledge of physiologic and pathologic processes.
(4) With the advent of the polymerase chain reaction (PCR), molecular biology is at last poised to enter the clinical microbiology laboratory.
(5) The advent of cyclosporine A provides the dermatologist with a new therapeutic strategem in the management of psoriasis, although the long-term safety of such interventional therapy remains to be discerned.
(6) Accurate reproducible measurements of the rate of gastric emptying have only been possible since the advent of external radionuclide detection techniques.
(7) However, the advent of the polymerase chain reaction, coupled with a boom in funding for human immunodeficiency virus research have moved retroviral research apace, raising questions as to whether novel contributions would be realized.
(8) With the advent of advancing methodology and monoclonal antibodies the new models support nuclear localisation of the receptor, the clinical significance of this in cancer treatment is far from clear.
(9) The advent of what is called the chemotherapy of mental diseases goes back to the early fifties, when a series of clinical observations led medical research to reconsider this field, that at the time was not particularly developed.
(10) Since the advent of modern methods of neonatal care, intracranial hemorrhage in premature infants, which is usually intraventricular, is probably not as uniformly fatal as generally admitted and the survivors are likely to develop post-hemorrhagic hydrocephalus.
(11) With the advent of colour coding in electro-optical displays, the need for a detailed quantification of focusing responses to chromatic stimuli is particularly important because of the influence of the chromatic aberration present in ocular optics on the focusing response of the eye.
(12) The latter has been used infrequently since the advent of antibiotics, except recently for treatment of cancer.
(13) Two technical developments, the advent of supercomputing as a routine tool in quantum solid-state material science and molecular dynamics on the one hand, and molecular biology on the other hand, have created--perhaps for the first time-the possibility of directly linking a more realistic description of the radiation field to observable events at biomolecular level.
(14) Breakthroughs in the areas of serology (e.g., removal of IgM antibodies and the use of CLL cells for serum screening), strategy (use of a calculated cumulative probability of transplantability to determine the necessary donor pool size), and therapy (the use of Staph A immunosorbent columns to remove IgG from the patient's serum and the advent of recombinant erythropoietin) are rapidly evolving to the point where there is promise of substantially improving the chances of transplanting highly sensitized patients.
(15) According to these criteria, cholecystectomy (removing not only the stones but also the offending gallbladder)--in particular with the advent of the laparoscopic approach--is the therapy of choice.
(16) The advent of electron microscopy has repeatedly confirmed Whipple's original postulate that bacterial infestation might be the cause of intestinal lipodystrophy (Whipple's disease).
(17) However the advent of computer-based image analysers offers a more straightforward, although less direct, method of making such measurements.
(18) The advent of stroboscopy has proved to be a breakthrough for the laryngologist studying the voice.
(19) The recurrent crises explain why a range of figures, from Blake to Gandhi , and Simone Weil to Yukio Mishima, reacted remarkably similarly to the advent of industrial and commercial society, to the unprecedented phenomenon of all that is solid melting into thin air, across Europe, Asia and Africa.
(20) Prior to the advent of liposuction, there were a number of reports in the medical literature about significant complication rates from facelifting, ranging in frequency from 1 to 8%.