(a.) Not perfect; not complete in all its parts; wanting a part; deective; deficient.
(a.) Wanting in some elementary organ that is essential to successful or normal activity.
(a.) Not fulfilling its design; not realizing an ideal; not conformed to a standard or rule; not satisfying the taste or conscience; esthetically or morally defective.
(n.) The imperfect tense; or the form of a verb denoting the imperfect tense.
(v. t.) To make imperfect.
Example Sentences:
(1) The spin-spin relaxation time T2 may be estimated using multiecho pulse sequences, but the accuracy of the estimate is dependent on the fidelity of the spin-echo amplitudes, which may be severely compromised by rf pulse and static field imperfections.
(2) Politicians must make decisions every day with imperfect knowledge, knowing that many of those choices may turn out to be ineffective.
(3) The quality of reduction is often imperfect and the techniques of surgical repair are very difficult and time consuming.
(4) An important source of failure in markets and justification for government intervention in the health sector of LDCs is imperfect information.
(5) It is suggested that absence or imperfect function of this reductase enzyme is the primary lesion in this disease.
(6) Dual aspects, crystallite size and lattice imperfection related to the crystallinity were analyzed by the process of Variance and Fourier analysis based on the X-ray diffraction line profiles.
(7) The membranous portion of the interventricular septum was thickened, and the aortic valve was thickened and had imperfect coaptation.
(8) Results reveal that while dental markets are imperfectly competitive, it is unclear whether prices exceed competitive levels.
(9) What we are witnessing is the collision of two imperfect storms: the Conservative party’s turmoil over the future of taxation, and the transformation of the economy.
(10) The mechanisms underlying the initial interaction between killer cell and target and the subsequent lytic event are imperfectly understood.
(11) It is shown that imperfect correlations between proficiency and preference measures, and J-shaped distributions of preference, can be predicted by such a model.
(12) We conclude that the liver may be viewed as an imperfectly mixed compartment with regard to the availability of the metabolite which is generated from a precursor.
(13) The theory of imperfect recanalization, the theory of vascular insufficiency, and studies which have been performed to validate each of these theories were reviewed.
(14) The results of this investigation indicate that the posttransplanted deterioration of metabolic levels were possibly caused by the imperfect oxygenation due to cellular edema after blood reflow.
(15) It would be easy to efficiently cut him down with the word “rapist”, particularly when I will not face any reprimands for my own imperfect behaviour during the relationship.
(16) "We had been doing exactly as any responsible, professional journalist would – recording and trying to make sense of the unfolding events with all the accuracy, fairness and balance that our imperfect trade demands."
(17) To stand virtuously in the grandstand looking down upon a world whose best efforts in inevitably imperfect times can never match your own exalted standards is a definition of irrelevance, not virtue.
(18) Les Misérables is a game with destiny: it dramatises the gap between the imperfections of human judgments, and the perfect patterns of the infinite.
(19) Association of radiological changes with imperfection of lungs' ventilating reserve of restrictive type was found in one man who was removed from the work in exposure to beryllium, as a person with an increased risk of falling ill.
(20) Reviewing it for the Guardian , Gillian Slovo described it as "a pained examination of the difficulties posed by a freedom that was won by imperfect human beings."
Pistil
Definition:
(n.) An epistle.
(n.) The seed-bearing organ of a flower. It consists of an ovary, containing the ovules or rudimentary seeds, and a stigma, which is commonly raised on an elongated portion called a style. When composed of one carpel a pistil is simple; when composed of several, it is compound. See Illust. of Flower, and Ovary.
Example Sentences:
(1) Raised levels of atmospheric water cause a variety of responses in self-pollen, ranging from tube growth through the pistil to the ovary, to tubes inhibited at the stigmatic surface, accompanied by the formation of callose.
(2) When applied to sections of the pistil, these antibodies label the intercellular matrix in the stigma and transmitting tissue of the style and the cell walls in the epidermis of the placenta.
(3) We describe in this report the allelic diversity and gene structure of the S locus in Solanum tuberosum revealed by the isolation and characterization of genomic and cDNA clones encoding S-associated major pistil proteins from three alleles (S1, Sr1, S2).
(4) The label is transferred from pistil to pollen tubes apparently via the secretion products (exudate) of the pistil.
(5) The female S-locus gene products for two families showing different types of SI have been putatively identified as major pistil glycoproteins (the S-locus-specific glycoproteins of the Brassicaceae and the S-RNases of the Solanaceae).
(6) LAT52 mRNA is not detectable in pistils, sepals or non-reproductive tissues.
(7) The S-glycoproteins were expressed mainly in the upper part of the pistil and showed an increasing concentration during flower development.
(8) In situ hybridization experiments showed that at least one of these pistil-specific genes is specifically expressed in cells of the transmitting tissue.
(9) The structural events in the stigma and transmitting tissue of Petunia hybrida pistils that accompany compatible and incompatible intraspecific pollinations have been investigated in detail, together with the changes in reserve levels that also take place at this time.
(10) After pollination, the transcript levels of the pistil-specific extensin-like genes change relative to levels in unpollinated pistils.
(11) Compatible and incompatible pollen tubes growing on detached Lilium longiflorum pistils which had been prelabeled with myoinositol-U-(14)C take up a portion of the label and utilize it for biosynthesis of tube wall substance.
(12) The S2- and S3-alleles encode pistil-specific proteins of 30 kDa and 31 kDa, respectively, which were previously identified based on cosegregation with their respective alleles in genetic crosses.
(13) The maximal levels of 9612 RNA detected in anthers and vegetative organs were more than 50-fold and 250-fold lower than the level in pistils, respectively.
(14) The possible roles of the extensin-like proteins in pistils are discussed.
(15) A glycoprotein serologically related to the PR-2,N,O class is a (1,3)-beta-glucanase and is present in pistils.
(16) Here we report the characterization of a gene encoding another pistil ribonuclease of P. inflata, RNase X2.
(17) Double staining with sirofluor allows location of nuclei within pollen tubes grown in vitro, and when used after pollination enables the viewer to discriminate between nuclei within the pollen tube vs. nuclei of the pistil tissue.
(18) In the case of pistils, a pattern of labeling in ovary, style, and stigma is obtained which indicates that products of myoinositol metabolism are utilized in the biosynthesis of exudate (secretion product) of the stigma and style as well as for components of pistil cell walls.
(19) RNA gel blot hybridizations demonstrated the organ-specific expression of the extensin-like genes and their temporal regulation during pistil development.
(20) We have sought to identify pistil-specific genes that can be used as molecular markers to study pistil development.