(n.) A genus of grasses, including a great number of species, as the kinds called meadow grass, Kentucky blue grass, June grass, and spear grass (which see).
Example Sentences:
(1) Gonadectomy has no effect on POA aromatase in the female.
(2) In addition, the warm-responsive neurones in the VMH region exhibited larger thermal coefficients than those in the POA region.
(3) Activity of the aromatase system in the POA, which converts testosterone to 17 beta-estradiol (E2), is increased by systemic androgen.
(4) In contrast, in the preoptic area-anterior hypothalamus (POA-AH) these antisera assayed amounts of LHRH that varied as a function of binding characteristics, although the quantities did not vary with the estradiol treatment schedule.
(5) Interleukin-1 alpha (IL-1 alpha) and interleukin-1 beta (IL-1 beta) are thought to be endogenous pyrogens, i.e., to mediate fever production; warm-sensitive (W) and cold-sensitive (C) neurons in the preoptic area (POA) are presumed to be the ultimate targets of endogenous pyrogens.
(6) One week after the placement of a lesion by radiofrequency or microinjection of kainic acid in the organum vasculosum of lamina terminalis (OVLT) but not in subfornical organ, ACTH response to intravenous IL-1 beta was enhanced, whereas both radiofrequency-induced lesion and kainic acid in the preoptic area (POA) suppressed the response.
(7) Pancreatic oncofetal antigen (POA) and carcinoembryonic antigen (CEA) were determined in plasma of 195 patients with breast cancer and 90 patients with colon carcinoma.
(8) These results show that damage to the AH or AH-POA junction in male marmosets causes a profound suppression of sexual 'arousal' and copulatory behaviour and that such affects are not due to androgen insufficiency or other, non-specific, side effects of neural damage.
(9) The threshold of AD and OD response in POA neurons declined during estrus and proestrus of the estrous cycle and in the Ovx-E group, but increased in the Ovx-P group and during diestrus.
(10) To determine if the median eminence itself could direct the growth of GnRH axons, co-grafts of POA and a fetal medial basal hypothalamic (MBH) block, which was predominantly median eminence, were made.
(11) These results indicate that the inductions of fever and plasma ceruloplasmin by IL6 are, like those of IL1, modulated in the POA, albeit the effective doses are much higher than those of IL1.
(12) Area POa in the lower bank is the recipient of a projection from the rostral inferior parietal lobule.
(13) Each neurotransmitter antagonist was administered via a chronically implanted steel guide tube into either the preoptic area (POA), retrochiasmatic area (RCh), or the median eminence region (ME).
(14) It is apparent from these studies that estrogen appears to activate the neurons of the POA receiving inhibitory synaptic input via the axonal collateral branches of the ARC neurons, and that progesterone seems to activate the neurons of the POA receiving excitatory synaptic input.
(15) In vitro estrogen formation was significantly lower in POA (p less than 0.05) and MBH (p less than 0.01) after castration.
(16) Custer I contained isolates from green healthy leaves of Agrostis tenuis, Festuca rubra, Holcus lanata, Lolium perenne and Poa pratensis, and clusters 2 and 3 consisted of isolates from Holcus lanata seeds and leaves of P. pratensis respectively.
(17) It was subsequently shown that males with a bilaterally lesioned SDN-POA still showed an increase in plasma testosterone.
(18) GnRH fibers projected from the medial POA to a dense fiber plexus in the median eminence (ME).
(19) The hypothalamic preoptic area (POA) was electrically stimulated through permanently implanted electrodes in 4 unanesthetized sheep.
(20) Coronal sections from midportions of the preoptic area (POA), suprachiasmatic nucleus (SCN) and arcuate nucleus (ARC) were examined by quantitative light microscopy in young (5 month) and old (18-20 months) intact mice and in old mice which had been ovariectomized at 6 months of age.
Proa
Definition:
(n.) A sailing canoe of the Ladrone Islands and Malay Archipelago, having its lee side flat and its weather side like that of an ordinary boat. The ends are alike. The canoe is long and narrow, and is kept from overturning by a cigar-shaped log attached to a frame extending several feet to windward. It has been called the flying proa, and is the swiftest sailing craft known.
Example Sentences:
(1) An Hfr13 Delta(proA-lac) deletion recipient, -Delta(proA-lac)-F-purE(+)-, has been utilized in a study of the origins of duplications formed during chromosome fragment integration.
(2) Subcloning showed that about 3.1 kilobases of V. parahaemolyticus DNA could complement proA and proB but not proC mutations of Escherichia coli.
(3) A library of Desulfovibrio desulfuricans Norway genomic DNA was constructed in Escherichia coli with pBR322 as vector and plasmids able to complement the proA and leuB mutations of the host were screened.
(4) N-acetylglutamic gamma-semialdehyde, if deacetylated, would produce glutamic gamma-semialdehyde, the proline precursor whose synthesis from glutamate is blocked in proA and proAB mutants.
(5) The proA gene encodes a typical 21-aa N-terminal signal sequence which, when fused to alkaline phosphatase by means of transposon TnphoA, was able to mediate transport of the alkaline phosphatase to the periplasm in E. coli.
(6) Eleven variants able to grow without proline (provided arginine was absent) were obtained by spontaneous mutation from Salmonella typhimurium LT7 proA and proAB deletion mutants.
(7) The mutations were linked to the proA, thr-48, lys-9015, argF10, and argG markers.
(8) The genes, proA and proP, each contain two introns.
(9) The following gene order has been established: gpt-proB-proA-ataA-supQ-newD.
(10) In proline auxotrophs blocked at an early step in proline biosynthesis (proA or proB), reversion to prototrophy is often due to a mutation in the arginine pathway which diverts N-acetyl glutamate gamma-semialdehyde to proline synthesis, thus bypassing the proA or proB block.
(11) Both conjugational and transductional data suggest that the strain carrying the proB(-) mutation also carries a second mutation close to the proA site which independently confers a Pro(-) phenotype.
(12) P22pro-1 and P22pro-3 are specialized transducing derivatives of phage P22 that carry the proA and proB genes of Salmonella typhimurium.
(13) Other supQ deletions are simultaneously Pro(-), because they extend into the proA or proA and proB genes; some extend even further, i.e., into the gpt gene (guanine phosphoribosyl transferase).
(14) From our sequence data the proB (1101 bp) and proA (1472 bp) genes were shown to code for two proteins of Mr 39,169 and 44,640, respectively.
(15) The former was mapped between tonA and proA, and the latter between the origin of genetic transfer of HfrH and serB.
(16) pIP218 retained all the other properties from F of HfrH: derepression for pilus synthesis, mobilization of the chromosome for the proximally transferred HfrH genes (thr, leu, proA), interference with T7 propagation, and ability to be cured by acridine orange.
(17) Gene defects in proA (five strains) and in proB (six strains) were identified by gonococcal transformation assays with recombinant bacteriophages or plasmids carrying proline biosynthesis genes from N. gonorrhoeae.
(18) Although, th recombinant plasmids containing the proA and proB genes were able to complement the Pro- phenotype of different E. coli strains, bacteria harboring these plasmids did not excrete L-proline to the culture medium.
(19) Strain 1485IN had acquired proline auxotrophy, but showed the same growth rate as W1485 in nutrient broth at 37 degrees C. Interrupted matings with Hfr strains of 1485IN revealed a gene arrangement of nalA-gal-trp-his-lac-proA-thrleu-ilv, in which gal, trp, and his were on the inverted segment.
(20) A thrombin-like proteinase (THROLP) was detected colorimetrically as the main proteolytic activity (PROA) in bronchoalveolar lavage fluid (BALF) 4 and 24 h after ovalbumin aerosol (OVA) challenge of actively immunized rats.