(n.) Any one of several metameric forms of the same substance, or of different substances having the same composition; as, xylene has three metamers, viz., orthoxylene, metaxylene, and paraxylene.
Example Sentences:
(1) On July 14, 1991, a train tanker car derailed in northern California, spilling 19,000 gallons of the soil fumigant metam sodium (sodium methyldithiocarbamate) into the Sacramento River north of Redding (Figure 1).
(2) Six patients with a lesion including the T12 metamer had testicular atrophy.
(3) We present a new method to generate the metamer ensembles for both direct light and reflecting-surface-color problems.
(4) The testicular volume was significantly smaller in patients with a lesion including the T12 metamer than in patients with a lesion sparing the T12 metamer.
(5) pupillometry, we measured the response of the pupil to tritanopic metamers alternating at 0.94 Hz.
(6) The major breakdown product of metam sodium, methylisothiocyanate (MITC), is a known skin irritant at high concentrations (greater than 1%).
(7) The homeotic gene Ultrabithorax (Ubx) is expressed in specific parts of Drosophila embryos: in a single metamer in the visceral mesoderm and forming a complex pattern limited to a broad domain in the ectoderm and in the somatic mesoderm.
(8) The different pathogenetic hypotheses are discussed in the light of macro- and microscopic morphological factors, of which the most plausible is that involving an anomalous position or orientation of the musculo-membranous folds which give rise to the septation system of the various metamers of the cardiac tube.
(9) Histologically it was a functionally silent paraganglioma originating from the intrathoracic aortosympathetic paraganglia, these being part of the very numerous groups of the paragangliar system distributed segmentally into metamers, particularly in the adrenal medulla.
(10) The curves of lidocaine (LDC) plasma levels versus time were evaluated in a group of 16 patients receiving single epidural injections of 2% LDC for each metamer to be anesthesized.
(11) To compare the effect of short wave cone adapting levels on the red-green detection sensitivity, thresholds were measured on pairs of adapting fields that were shown to be tritanopic metamers for our individual observers: violet and green adapting lights that produce equal quantal catches in M cones and in L cones but very differently stimulate S cones.
(12) All of the spectrally different colors that match according to an observer form a metamer ensemble.
(13) In the pain-free period, muscular, subcutaneous and cutaneous sensory thresholds to electrical stimulation were measured in the lumbar region (metamer L1) on both sides: (1) pain thresholds were lower on the affected side with respect to both the contralateral side and control thresholds recorded in normal subjects; (2) the greatest decrease in threshold was in the muscle (even the sensation of sustained contraction was no longer detectable), followed by subcutaneous tissue, and the smallest decrease was in the skin.
(14) The possibility of ejaculation after physostigmine mainly depended on the integrity of the T12-L2 metamers.
(15) Using the counterphase-modulated-tritan-metamers method of Wisowaty and Boynton [Vision Res.
Metamerism
Definition:
(n.) The symmetry of a metameric structure; serial symmetry; the state of being made up of metameres.
(n.) The state or quality of being metameric; also, the relation or condition of metameric compounds.
Example Sentences:
(1) This is especially evident on the ventral surface of the metamerically arranged axial muscles.
(2) The sloppy paired locus is involved in the establishment of the metameric body plan of the Drosophila embryo.
(3) In Haemopis embryos labeling of both nerve fibers and cell bodies with the antibody appears as expected for a metameric animal in a rostrocaudal temporal gradient from about day 5-6.
(4) These six metameres also are responsible for the existence of the pronephros.
(5) In each metamere, the area of cell migration takes place near the caudal border of the somite and, from one somite to the other, the number of migrating cells increases in a cephalo-caudal direction.
(6) The differences in levels between males and females and between anatomical regions during imaginal life suggest, in this species of cockroach, the physiological importance of the metameric organization in metabolic pathways or functional aspects of biogenic amines.
(7) Prior to dorsal closure, expression of the Drosophila gene is observed in non-neuronal tissues, especially in the mesectoderm and presumptive epidermis, both in a metameric pattern.
(8) Moreover, such a causative role of cell lineage is suggested by cases where homologous cell types characteristic of a symmetrical and longitudinally metameric body plan arise via homologous cell lineages.
(9) The case is characterized by successful counteracting the main clinical manifestations of Raynaud's phenomenon by the local metameric application of cerebrolysin (neuromeric, scleromeric puncturing) employed by the authors for the first time for the disease treatment.
(10) In mild contusion of the first-second segments the leading clinical symptoms in the acute period were pareses of the arms and paralyses of hands with retained reflexes and insignificant impairments of sensitivity in fingers, i.e., the level of clinical manifestations did not correspond with the conventional segmento-metameric innervation.
(11) A second group of patients had SAs that remained unchanged despite AVM changes (six of seven of these were in patients with metameric angiomatosis).
(12) The larval development of P. porosa is characterized by its passing in the cavity of the external cyst, by the complete separation of anlages of the body of the larva and cercomere at the metamere stage and by the intensive growth of the cercomere after the invagination of the larva.
(13) Life forms of plants are divided into thirteen types corresponding to the nature of their basic metameres.
(14) The invagination process of the metamere is described.
(15) This metameric migration pattern is thought to be caused by molecular differences between the rostral and caudal portions of the somite.
(16) Identification of specific neuronal populations and their projections in the developing hindbrain reveals a segmental organization in which pairs of metameric epithelial units cooperate to generate the repeating sequence of cranial branchiomotor nerves.
(17) In all three organisms, the pattern of engrailed expression at the segmented germ band stage is similar, and the parasegments are the first metameres to form.
(18) When neural crest cells were ablated surgically prior to their emigration from the neural tube, the pattern of T-cadherin immunoreactivity was unchanged compared to unoperated embryos, suggesting that the metameric T-cadherin distribution occurs independent of neural crest cell signals.
(19) Each nerve is in relation with a column of motoneurons whose both the metameric extension and the exact topography in the anterior horn have been defined.
(20) It allows to accurately reach the desired metameric level, avoiding massive sympathetic blockade, and providing a steady hemodynamic condition.