(n.) A young or inferior devil; a little, malignant spirit; a puny demon; a contemptible evil worker.
(n.) Something added to, or united with, another, to lengthen it out or repair it, -- as, an addition to a beehive; a feather inserted in a broken wing of a bird; a length of twisted hair in a fishing line.
(n.) To graft; to insert as a scion.
(n.) To graft with new feathers, as a wing; to splice a broken feather. Hence, Fig.: To repair; to extend; to increase; to strengthen to equip.
Example Sentences:
(1) Intramembrane particles (IMP) were quantitatively assessed in the perikaryal plasma membranes of infundibular neurons.
(2) The inhibition by TAD of IMP DH activity in ovarian carcinomas (N = 4) was 81%.
(3) Incubation of I diaphragms with isoproterenol did not significantly increase the concentrations of AMP, IMP or inorganic phosphate, activators of phosphorylase beta activity, nor was there a decrease in ATP and glucose 6-phosphate content, allosteric inhibitors of phosphorylase beta activity.
(4) Second, interconversion of adenine nucleotides to guanine nucleotides, is curtailed by the inhibition of IMP dehydrogenase by these same IMP analogues.
(5) Under optimal reaction conditions, HhaI and RsaI cleaved the DMTS-std duplex to 76-77% completion and the DMTS-imp duplex to 96-99% completion.
(6) The incorporation of inosine or hypoxanthine into the IMP and ITP has been proved.
(7) At all times, a tight inverse correlation exists between ATP and IMP concentrations.
(8) It was concluded that the IMP content of human skeletal muscle is very low at rest and after low-intensity exercise, but increases after moderate and high-intensity exercise.
(9) The synthetic "C" nucleoside, tiazofurin (2-beta-D-ribofuranosylthiazole-4-carboxamide), its selenium analogue selenazofurin, and the related inhibitor of inosine 5'-phosphate (IMP) dehydrogenase, mycophenolic acid, are effective inducers of the terminal differentiation of HL-60 promyelocytic leukemia cells.
(10) After 60 min recovery, exercise was performed for 8-10 min each at 20, 30, 40 and 50 W. Measurements of pulmonary oxygen uptake, heart rate, blood pressure, leg blood flow, and femoral arterial-venous differences of oxygen content and lactate were performed as well as determination of ATP, creatine phosphate (CP) inosine monophosphate (IMP) and lactate concentrations on biopsy material from the quadriceps muscle before and immediately after the intense exercise, and at 3, 10 and 60 min into recovery.
(11) Virazole 5'-phosphate was subsequently found to be a potent competitive inhibitor of inosine 5'-phosphate dehydrogenase (IMP:NAD(+) oxidoreductase, EC 1.2.1.14) isolated from Escherichia coli (K(m) = 1.8 x 10(-5) M) with a K(i) of 2.7 x 10(-7) M. Guanosine 5'-phosphate (GMP) was a competitive inhibitor of this enzyme with a K(i) of 7.7 x 10(-5) M. Virazole 5'-phosphate was similarly active against IMP dehydrogenase isolated from Ehrlich ascites tumor cells, with a K(i) of 2.5 x 10(-7) M. The K(m) for this enzyme was 1.8 x 10(-5) M, and the K(i) for GMP was 2.2 x 10(-4) M. These results suggest that the antiviral activity of Virazole might be due to the inhibition of GMP biosynthesis in the infected cell at the step involving the conversion of IMP to xanthosine 5'-phosphate.
(12) Initial rate kinetic studies demonstrate the ppGpp inhibition is competitive with respect to GTP and noncompetitive with respect to L-aspartate and IMP.
(13) Uptake of IMP was calculated from the arteriovenous difference of 14C-IMP across the lung and lung effluents and homogenates were analyzed for the presence of metabolites of IMP.
(14) During continuous isometric exercise with constant stimulation time, the amount of IMP was linearly and inversely related to the age of the animals; a higher IMP concentration was found in intermittent isometric and dynamic exercise.
(15) We evaluated the effect of high partial pressures of O2 on pulmonary uptake and metabolism of IMP.
(16) Thus, 123I-IMP and 99mTc-HM-PAO SPECTs seemed to be a useful tool in the diagnosis, deciding of whether the treatment was suspended or continued, and clarifying the pathophysiology in HSE.
(17) It was considered that the analysis of the lung release of 123I-IMP forms a new lung dysfunction index.
(18) The increased activity in cancer cells of inosine 5'-monophosphate dehydrogenase (IMP DH, EC 1.1.1.205), the rate-limiting enzyme of de novo GTP biosynthesis, was suggested as a sensitive target for chemotherapy.
(19) To determine the biochemical mechanisms of cytotoxicity of these drugs, assay procedures have been developed for measurement of the levels of intermediates proximal to IMP in the pathway for de novo purine biosynthesis in mouse L1210 leukemia cells.
(20) Our review indicates that 123I-IMP SPECT may have an important future role in the early diagnosis and management of patients with acute infarctive stroke and AD.
Urchin
Definition:
(n.) A hedgehog.
(n.) A sea urchin. See Sea urchin.
(n.) A mischievous elf supposed sometimes to take the form a hedgehog.
(n.) A pert or roguish child; -- now commonly used only of a boy.
(n.) One of a pair in a series of small card cylinders, arranged around a carding drum; -- so called from its fancied resemblance to the hedgehog.
(a.) Rough; pricking; piercing.
Example Sentences:
(1) CyIIIa.CAT) expression simultaneously in embryos bearing excess competitor regulatory DNA, we developed, and here describe, a new procedure for generating transgenic sea urchin embryos in which all of the cells in many embryos, and most in others, bear the exogenous DNA.
(2) An oligonucleosome 12-mer was reconstituted in the absence of linker histones, onto a DNA template consisting of 12 tandemly arranged 208-base pair fragments of the 5 S rRNA gene from the sea urchin Ly-techinus variegatus (Simpson, R. T., Thoma, F. S., and Burbaker, J. M. (1985) Cell 42, 799-808).
(3) 1c for structure), for continuous measurement of [Ca2+]i from fertilization through the first cleavage of individual eggs of the sea urchin Lytechinus pictus.
(4) The agglutination of the sea urchin spermatozoa was inhibited specifically by ceratain carbohydrates.
(5) The levels of different classes of mitochondrially encoded transcripts are developmentally regulated in sea urchin embryos, as a result of selection between mutually exclusive synthetic pathways.
(6) Antimicrobial activity of polyhydroxynaphthoquinones from sea urchins was studied.
(7) A special type of beta-turn structural motif has been proposed for this sequence, and it has been shown that a segment of the sea urchin sperm H1 N terminus, which has six repeats of the motif (S6 peptide), binds to DNA and competes with the DNA binding drug Hoechst 33258.
(8) The fertilization reaction of echinoderm eggs (Lytechinus pictus, a sea urchin, and Dendraster excentricus, a sand dollar) was followed with intracellular electrodes.
(9) Sperm-specific histone variants in the sea urchin Paracentrotus lividus are replaced early after fertilization with a specific embryonic set of histone variants.
(10) Spermidine is rapidly taken up and becomes bound to protein during the very early hours of sea urchin embryogenesis.
(11) The tandemly repeated genes were expressed at a higher rate in blastula than in gastrula stage relative to the single-copy gene, when the two genes were injected into sea urchin zygotes.
(12) The purine inhibits the detachment of the vitelline layer from the sea-urchin egg plasma membrane after fertilization and this effect leads to polyspermy.
(13) Microtubule assembly is required for the formation of the male and female pronuclei during mouse, but not sea urchin, fertilization.
(14) In situ hybridization of sea urchin (Psammechinus miliaris, Lytechinus pictus and Strongylocentrotus purpuratus) histone messenger RNA has been used to map complementary sequences on polytene chromosomes from Drosophila melanogaster.
(15) We have examined the relationship between the newly synthesized mRNA that enters polysomes in sea urchin embryos and the messengerlike RNA that enters the pool of ribosome-free ribonucleoprotein particles (free RNPs or informosomes).
(16) Individual oocytes of the sea urchin with diameters which ranged from 86 to 102% that of the average diameter for mature eggs from the same female were examined.
(17) Puncture wounds were cuased in 9 patients by sea urchin spines and 1 patient by a date palm thorn.
(18) A method based on the degradation by enzymes and nitrous acid of isotopically labelled glycosaminoglycans has been employed to study the synthesis of these compounds in normal, animalized and vegetalized sea urchin embryos.
(19) From these results, we conclude that USE 1 and perhaps USE 2 in the H2A modulator are upstream transcriptional elements that are recognized by trans-acting factors common to Xenopus and sea urchin.
(20) We have used an in vitro assay to characterize some of the motile properties of sea urchin egg kinesin.