(interj.) An exclamation expressing, by different intonations, triumph, mixed with derision or irony, or simple surprise.
(n.) A sunk fence. See Ha-ha.
Example Sentences:
(1) The coding sequence for Spirulina platensis acetohydroxy acid synthase (AHAS, EC 4.1.3.18) is shown to be contained within a 4.2 Kb ClaI fragment (ilvX) that has been cloned from a recombinant lambda library.
(2) The acetohydroxy acid synthase (AHAS) isozymes from enterobacteria are each composed of a large and small subunit in an alpha 2 beta 2 structure.
(3) The potency of L-valine as an inhibitor of Zea mays acetohydroxyacid synthase (AHAS) is increased more than 8000-fold on conversion to its N-phthalyl anilide derivative which is active at 2 microM.
(4) Evidence is presented that suggests the presence of multiple genetic regions for synthesis and control of the valine-sensitive AHAS activity.
(5) The mutant strain, growing in minimal medium, exhibits a partial growth limiatation and derepression of AHAS, owing to deficient synthesis of isoleucine.
(6) Autoimmune hemolytic anemia (AHA) is uncommon in childhood.
(7) The subjects who were older and had higher levels of plasma LDL cholesterol and total fat intake at baseline experienced better plasma LDL cholesterol response to the AHA diet.
(8) AHA axons staying ventral projected to the supramammillary region, ventral tegmental area, raphe nuclei and midbrain reticular formation.
(9) The glutamic acid (Glu) concentration was significantly higher in AHa (p less than 0.02), CAH (p less than 0.001) and CPH (p less than 0.001) and the tyrosine (Tyr) concentration was significantly higher in AHa (p less than 0.02), CPH (p less than 0.001), CAH (p less than 0.001) and LC (p less than 0.001) than they were in the controls.
(10) The surgical group showed a significantly higher humoral immune response than the AMI group when analyzed for AHA and anti-contractile protein antibodies.
(11) Whereas medial PO-AHA lesions were associated with normal body length and weight and evidence of estrogen secretion, anterior hypothalamic cuts produced increased linear growth and body weight and signs of functional castration.
(12) SPECT images were compared with left ventriculography (LVG); vertical long-axial ECT images with segments 1-5 of LVG by the AHA classification, and horizontal ECT long-axial images with segments 6 and 7 of LVG, respectively.
(13) "A ban on sales of alcohol below the cost of duty plus VAT will affect less than 1% of products sold in shops and off-licences," said Dr Vivienne Nathanson, director of professional activities for the British Medical Association, an AHA member.
(14) Inhibition of the enzyme and of root growth by the valine derivatives may result from binding at or near the site involved in feedback control of AHAS by L-valine.
(15) Discrete lesions in the anterior hypothalamus (AHA) of the guinea pig brain reduce the anaphylactic contraction of the trachea in vitro after active in vivo sensitization by 40%.
(16) And then I thought, aha, when it comes to shooting my close-ups, I won't move, so he won't be able to cut it in.
(17) Medial but not lateral PO-AHA lesions caused elevated nonstress plasma GH levels at 2, 14, 17, and 23 weeks after surgery, but normal levels were obtained at autopsy at 27 weeks.
(18) Evaluation of urinary excretion data suggests that patients with compromised renal function have low recoveries of AHA in the urine.
(19) In cultures where both IgM AHA and total IgM secretion were measured, a much greater T cell dependence for AHA production was apparent.
(20) AHA positivity was unrelated to the type of joint involvement, disease activity, and drug regimen.
Cha
Definition:
Example Sentences:
(1) [3H]cyclohexyladenosine (CHA) and [3H]PN200-110 were used to label muscarinic and adenosine A1 receptors and L-type calcium channels, respectively.
(2) Since ADO is a metabolic substrate and a nonselective receptor agonist, while CHA is A1-selective and a poor substrate for cellular uptake, neither A2 activation nor cellular uptake altered expression of the A1 effect of exogenous ADO.
(3) R-PIA, CHA and NECA inhibited contraction in both preparations.
(4) In contrast to the relative consistency of the patterns of 3H-CHA binding in these species, 5'-nucleotidase exhibited wide variations in both the absolute amount of activity and its localization.
(5) Concomitant measurement of [3H]-CHA binding in the mesencephalic reticular formation was also carried out in order to explore the neurochemical basis of the development of tolerance.
(6) For aortic relaxation the analogues exhibited the following rank order of potency: NECA greater than adenosine greater than 2-CA greater than R-PIA greater than CHA.
(7) Regulation of c-fos protooncogene activity in rat embryonal fibroblasts (REF), E1Aad5-immortalized REF cells, and E1Aad5 + cHa-ras transformed REF cells has been investigated.
(8) Although more studies are needed, a recent report of potential utilization of nonstimulated oocytes for donor programs as well as IVF-cryopreservation was a promising new development (Cha et al.
(9) 3H-CHA and 3H-NECA binding sites are concentrated in layers 1-3 and upper layer 5 in the visual cortex of adult cats.
(10) In this paper, CDDP-CHA tried to apply for experimental bone and soft tissue sarcoma.
(11) The effect of toxin on adenosine receptors was also evaluated by measuring binding of the adenosine agonist cyclohexyladenosine (CHA).
(12) "All those vuvuzuelas must be interfering with Cha Bum-Kun's ability to remote control his robot creation - er, son - Cha Du-ri," suggests Angela K, a South Korean expat in the US.
(13) The R(-)- and S(+)-enantiomers of N6-(2-phenylisopropyl)adenosine (R-PIA and S-PIA respectively), N6-cyclohexyladenosine (CHA) and 2-chloroadenosine (CADO) caused contractions at low concentrations (0.05-2.0 microM), whereas at higher concentrations, relaxation resulted.
(14) Circular harmonic averaging (CHA), a novel, reference-independent averaging method developed by W. Kunath and H. Sack-Kongehl [1989) Ultramicroscopy 27:171-184) allows analyzing images of single molecules of the receptor in its native membrane-bound state.
(15) An unexpected finding was that R-PIA, 2-CA and CHA all induced contractions at concentrations lower than were required for relaxation, giving a biphasic dose-response curve.
(16) Concentrations to achieve half-maximum responses were 92.5 nM for 2-ClAdo, 39 nM for CHA, and 107 nM for NECA.
(17) Moreover, the addition of guanylyl-5'-imidodiphosphate, a GTP analogue, to the incubation medium reduced CHA binding by the same order of magnitude whether rats were given saline or bicuculline, suggesting that additional adenosine A1 receptors are also functionally linked to G proteins.
(18) Hippocampi from theophylline-treated animals showed a significantly greater number of [3H]CHA binding sites (apparent Bmax; 125% of control, P less than 0.05), without a significant change in binding affinity, and were more sensitive than controls to the inhibitory effects of adenosine on the population spike response.
(19) Both genes were shown to be present in haploid embryos and have been isolated from a genomic library, the exons and deduced amino acid sequences of which are presented here (salmon CHA and CHB).
(20) Accordingly, the peak in adenosine receptor binding, using (-)[125I]iodo-N6-hydroxyphenyl-isopropyladenosine as the radioligand, coincided with CHA-inhibitable adenylate cyclase activity.