(1) After sporangiophores were initially adapted symmetrically to a fluence rate of 1 W m-2 (447 nm), they were exposed to unilateral subliminal light (subthreshold for phototropism) of variable wavelength and fluence rate, and then to unilateral test light (447 nm) of fluence rate either 10(-3) or 10(-5) W m-2.
(2) Phototropic and light growth responses of the sporangiophore of Phycomyces have been elicited using tunable laser stimulation from 575 to 630 nm.
(3) To investigate the influence of calcium on dark adaptation, the phototropic latency method was employed with the modification that sporangiophores were temporarily immersed in solutions containing CaCl2 or LaCl3.
(4) A phototropic mechanism is proposed which combines the features of local adaptation and photoreceptor rotation.
(5) Conversion to a continuous temporal stimulus insures that phototropism never adapts as long as the spatial asymmetry in illumination is maintained.
(6) The HPLC elution profiles of the wild type were compared to a set of phototropism mutants (genotype mad) with specific defects in the light-transduction pathway.
(7) Experimental evidence indicates that during phototropism, Phycomyces sporangiophores use their own net rotation to convert an apparently spatial stimulus to a temporal one.
(8) The differences in codon usage for the fru operon versus the photosynthetic genes may reflect different proportions of the various tRNA specific for certain amino acids when cells are grown under heterotrophic versus phototropic conditions.
(9) The phototropic stimulus straddles the edge between light- and dark-adapted regions, and the differing responses of the two regions affects the direction of phototropic bending.
(10) Phototropic latencies could be shortened by subliminal light that was less intense than the test light by several orders of magnitude.
(11) These four protein spots that are altered in madA, madB, and madC mutants may represent component of the photoreceptor complex responsible for phototropism in Phycomyces.
(12) The sporangiophores of Phycomyces do not exhibit phototropic responses when growth is arrested reversibly by cooling to 1 degrees C. Unilateral UV stimuli (254 nm) applied during cold periods are stored for at least 2 hr and produce tropic responses away from the light after warm-up.
(13) This was not due to enhanced phototropism in this stage.
(14) The separation of membrane fragments was investigated in extracts of phototropically grown Rhodopseudomonas sphaeroides to determine if the plasma membrane contains discrete regions.
(15) Phototropism in the fungus Phycomyces is mediated by two photosystems that are optimized for the low-intensity region (below 10(-6) W X m-2) and the high-intensity region (above 10(-6) W X m-2).
(16) Specifically, we have compared gels for night-blind mutants and a wild-type strain to find proteins involved in the early steps of the sensory transduction chain for phototropism.
(17) In this paper, a comparative study of phototropism and anthropophilia is made in order to identify the sandflies species involved in the transmission of Leishmaniasis and to increase our knowledge of their biology.
(18) The dark adaptation kinetics of Phycomyces phototropism depend critically on the experimental protocol.
(19) An asymmetric modification of the model reproduces the two types of phototropic inversion discovered by Reichardt and Varjú and by Dennison.
(20) Certain phototropism mutants of Phycomyces blakesleeanus show defective bending responses (tropisms) to stimuli besides light, such as gravity, wind, and barriers.
Positively
Definition:
(adv.) In a positive manner; absolutely; really; expressly; with certainty; indubitably; peremptorily; dogmatically; -- opposed to negatively.
Example Sentences:
(1) The bank tellers who saw their positions filled by male superiors took special pleasure in going to the bank and keeping them busy.
(2) In each sheep there was a significant negative correlation between the glucose and corticosteroid concentrations in both maternal and fetal plasma, and there were positive correlations between the maternal and fetal plasma concentrations of glucose, and between the glucose and fructose concentrations of fetal plasma.
(3) None of the strains was found to be positive for cytotoxic enterotoxin in the GM1-ELISA.
(4) The patterns observed were: clusters of granules related to the cell membrane; positive staining localized to portions of the cell membrane, and, less commonly, the whole cell circumference.
(5) In 49 cases undergoing systemic lymphadenectomy 32 were found to have glandular involvement, of which both aortic and pelvic nodes were positive in 17 cases (53.1%), aortic nodes positive but pelvic negative in six (18.8%), and pelvic nodes positive but aortic negative in nine (28.1%).
(6) The Na+ ionophore, gramicidin, had a small but significant inhibitory effect on Na(+)-dependent KG uptake, demonstrating that KG uptake was not the result of an intravesicular positive Na+ diffusion potential.
(7) Fecal occult blood was positive in 4 patients and fecal leukocytes were positive in one patient.
(8) We have determined the genomic structure of the fosB gene and shown that it consists of 4 exons and 3 introns at positions also found in the c-fos gene.
(9) An unsaturated fatty acid auxotroph of Escherichia coli was grown with a series of cis-octadecenoate isomers in which the location of the double bond varied from positions 3 to 17.
(10) It is concluded that amlodipine reduces myocardial ischemic injury by mechanism(s) that may involve a reduction in myocardial oxygen demand as well as by positively influencing transmembrane Ca2+ fluxes during ischemia and reperfusion.
(11) Stimulation is also observed with mixtures of APC expressing DPw3 and APC expressing A1, and likewise, DPw3+ APC become stimulatory when preincubated with supernatants from A1-positive cells.
(12) Nine of 14 patients studied for documented clinical relapse had positive repeat studies.
(13) Ca2+ transport was positively correlated with MR cell density.
(14) At pH 7.0, reduction is complete after 6 to 10 h. These results together with an earlier study concerning the positions of the two most readily reduced bonds (Cornell J.S., and Pierce, J.G.
(15) A quadripolar catheter was positioned either at the site of earliest ventricular activation during induced monomorphic ventricular tachycardia or at circumscribed areas of the left ventricle.
(16) Fifteen sera ICA-IgG and ICA-protein A positive with high titres remained positive thereafter.
(17) These data indicate that RNA faithfully transfers "suppressive" as well as "positive" types of immune responses that have been reported previously for lymphocytes obtained directly from tumour-bearing and tumour-immune animals.
(18) Induction of labor, based upon only (1) a finding of meconium in the amniocentesis group or (2) a positive test in the OCT group, was nearly three times more frequent in the amniocentesis group.
(19) Mike Ashley told Lee Charnley that maybe he could talk with me last week but I said: ‘Listen, we cannot say too much so I think it’s better if we wait.’ The message Mike Ashley is sending is quite positive, but it was better to talk after we play Tottenham.” Benítez will ask Ashley for written assurances over his transfer budget, control of transfers and other spheres of club autonomy, but can also reassure the owner that the prospect of managing in the second tier holds few fears for him.
(20) When subjects centered themselves actively, or additionally, contracted trunk flexor or extensor muscles to predetermined levels of activity, no increase in trunk positioning accuracy was found.