(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.
Congenital
Definition:
(a.) Existing at, or dating from, birth; pertaining to one from birth; born with one; connate; constitutional; natural; as, a congenital deformity. See Connate.
Example Sentences:
(1) The origin of the aorta and pulmonary artery from the right ventricle is a complicated and little studied congenital cardiac malformation.
(2) Cor triatriatum (CT) is a rare congenital defect, surgically correctable, and sometimes difficult to diagnose by cardiac catheterization.
(3) The position of the cyst supports the theory that branchial cysts are congenital in origin.
(4) In addition, congenital anemias such as sickle cell disease can impact on the health of the mother and fetus.
(5) A case of congenital subglottic fibroma is presented.
(6) Congenitally deficient plasmas were used as the substrate for the measurement of procoagulant activities in a one-stage clotting assay.
(7) Attempts to eliminate congenital dislocation of the hip by detecting it early have not been completely successful.
(8) Instead of later renal failure and, of course, mental retardation, it was the histological features of the fetus eyes which permit to diagnose and exhibit both congenital cataract and irido-corneal angle dysgenesis.
(9) In the interim, sonographic studies during pregnancy in women at risk for AIDS may be helpful in identifying fetal intrauterine growth retardation and may help raise our level of suspicion for congenital AIDS.
(10) After early repair of congenital cardiovascular defects, such as coarctation of the aorta, late stenosis may become a problem.
(11) This study examines the morphology of sporadic congenital microphthalmia in 1-day-old chicks, with particular emphasis on the neural retina.
(12) It is usually associated with a left superior caval vein draining into the coronary sinus and is frequently part of a complex congenital malformation of the heart.
(13) Aplasia of the trachea associated with multiple congenital anomalies is described in a stillborn male foetus with single umbilical artery.
(14) Neuromuscular disorders in small animals include a diverse group of congenital and acquired diseases.
(15) Urologic evaluation of all patients with congenital scoliosis is recommended; however, diagnostic ultrasonographic evaluations of the urinary tract have proven to be an acceptable alternative as an initial screening modality.
(16) These examinations are used in the evaluation of congenital heart disease for preoperative planning and postoperative evaluation.
(17) Further management of the congenital cases was based on the experience that children outgrow this disorder; periodic dilatation may augment the natural process.
(18) Congenital defect of a cervical pedicle produces a rare clinical syndrome with a characteristic X-ray picture associated with vague clinical signs often accentuated after trauma.
(19) We document four patients, including two sibs, with asphyxiating thoracic dystrophy and mild congenital hydrocephalus.
(20) A case of mixed congenital abnormalities in a fetus demonstrated ultrasonographically during the second trimester of pregnancy in an uncontrolled insulin-dependent diabetic mother is presented.