(n.) An element, atom, or radical having a valence or combining power of two.
(a.) Having a valence or combining power of two; capable of being substituted for, combined with, or replaced by, two atoms of hydrogen; as, oxygen and calcium are dyad elements. See Valence.
Example Sentences:
(1) The 3' end of the cell cycle regulated mRNA terminates immediately following the region of hyphenated dyad symmetry typical of most histone mRNAs, whereas the constitutively expressed mRNA has a 1798 nt non-translated trailer that contains the same region of hyphenated dyad symmetry but is polyadenylated.
(2) Termination of sar RNA synthesis occurs after transcription of the first and second Ts of a TTTA sequence following a region of hyphenated dyad symmetry.
(3) Sixty mother-toddler dyads (30 boys and 30 girls) participated as subjects.
(4) The reciprocal (equivalent) and nonreciprocal (excessive giving or receiving) exchange of services was measured by the frequency of exchange and perception of potential support between the dyad.
(5) Because current family systems theory indicates that positive individual relationships within a dyad (e.g., child-mother) should be related to an overall favorable impression of the family system, we hypothesized that these two instruments should demonstrate convergence on selected dimensions.
(6) The purpose of the study was to determine the effect of two interventions, Calorie Management and Socioemotional Growth Fostering, on (a) the weight of children aged 1 to 3 years with nonorganic failure to thrive and (b) the interaction behaviors of 10 mother-child dyads.
(7) Most of the literature on this subject has indicated, contrary to the findings reported here, that full and intense erotic transference manifestations are rarely if ever seen in this therapeutic dyad.
(8) (2) The peak-to-peak spacing in this distribution is significantly different from 10.3 bases in the region covering three helix turns immediately 5' of the dyad axis.
(9) Assertive needs produced the largest number od dyads which discriminated (p less than .05) clinical and control groups.
(10) However, two mutations which increased the dyad symmetry of part of the binding site yielded ligands with a higher affinity for MDBP.
(11) This mutation is partly located within a region of dyad symmetry.
(12) The purpose of this study was to compare dyadic interaction behavior of traumatically disabled and nondisabled men paired in homogeneous or mixed dyads.
(13) MCM1 binds to the dyad symmetry element 5'-CCTAATTAGG and related sequences, which we refer to as MCM1 control elements (MCEs).
(14) Data also suggest that black dyads are represented more frequently in the positive categories, and white dyads are more likely to be categorized as "apathetic" or "hostile."
(15) (2) Coincident disomy increased as a function of the mean number of disomic chromosomes per spore in each dyad, but this increase differed functionally from that expected if coincident disomy in the two ascospores were a simple, meiotically independent, concomitant of multiple disomy.
(16) Binding sites for the GAL4-positive regulatory protein have been identified upstream of six galactose-inducible genes of Saccharomyces cerevisiae on the basis of (i) protection in DNAse I footprints, (ii) loss of protection when excess GAL4-binding oligonucleotide is added and (iii) homology with a 23-bp dyad-symmetric consensus sequence.
(17) The distance from spouse (or partner) repeats within the marital dyad the lack of closeness to parents experienced in adolescence.
(18) Mothers in B2 and B3 dyads were rated more sensitive and responsive than all others at all 4 observations.
(19) Maternal stimulation and co-ordinated infant signalling in AGA dyads, and infant quietness and maternal activity encouraging quietness in SGA dyads, were patterns in high-scoring subjects.
(20) Encouragement of open, direct communication between members of a dyad may produce favorable or unfavorable results, depending upon the situation.
Triad
Definition:
(n.) A union of three; three objects treated as one; a ternary; a trinity; as, a triad of deities.
(n.) A chord of three notes.
(n.) The common chord, consisting of a tone with its third and fifth, with or without the octave.
(n.) An element or radical whose valence is three.
Example Sentences:
(1) The triad of epigastric pain unrelieved by antacids, bilious vomiting, and weight loss, particularly after a gastric operation should make one suspect this syndrome.
(2) The syndrome initially described by Behçet in 1937 comprised the triad of ocular inflammation, oral and genital ulcers.
(3) The diagnostic triad of pneumoperitoneum on x-ray, evidence or history of CMV infection, and AIDS occurred in 70 percent of patients.
(4) The characteristic signs and symptoms represent the triad of a pulsatile mass in the upper part of the abdomen, intermittent hemorrhage in the upper part of the gastrointestinal tract and severe epigastralgia not relieved by antacids.
(5) Cardiac myxomas typically present as a triad of obstructive, embolic, and constitutional symptoms and thus mimic many more common systemic illnesses.
(6) A mother and daughter both presented at age 5 years with the triad of right-sided congenital cholesteatoma, right preauricular pits, and bilateral sensorineural hearing loss.
(7) Traumatic hemobilia is commonly associated with cavitary injuries to the liver, and is classically characterized by a triad of findings: GI bleeding, biliary colic, and jaundice.
(8) The tryptase sequence includes the essential residues of the catalytic triad and an aspartic acid at the base of the putative substrate binding pocket that confers P1 Arg and Lys specificity on tryptic serine proteases.
(9) The authors observed in one child and AGR triad and in two patients deformities of the skeleton of the head and lower extremities.
(10) The prospects of further progress in radiation therapy, based on the triad of patient care, teaching and research, now seem assured.
(11) Dermatopathia pigmentosa reticularis is a rare heritable disorder consisting of a triad of cutaneous findings including reticulate hyperpigmentation, noncicatricial alopecia, and onychodystrophy.
(12) The classical triad of symptoms seen in hemochromatosis (cirrhosis of the liver, diabetes mellitus, and skin pigmentation) are often supplemented by cardiomyopathy.
(13) The clinical history of acute pyelonephritis, avascular mass lesion of the kidney with ipsilateral pleural effusion (triad) seen in a female patient of child-bearing age is characteristic of this condition.
(14) In contrast, changes at Arg-7, Lys-12 and any one proline residue in the triad moderately reduced, and substitution of Lys-19 showed little effect on, activity.
(15) Four of the six patients had a progressive triad of ear pain, facial paralysis, and sensory loss in the second and third divisions of the trigeminal nerve.
(16) Skeletal muscle triads are possessing the whole set of enzymes of the phosphatidylinositol (PI)-linked signal generating pathway, PI-kinase, PI(4)P-kinase, and PI(4,5)P2-phospholipase C (PLC).
(17) In the present experiments, neurons were plated together in close apposition as pairs or as triads, with the tip of one Retzius cell touching the soma of another.
(18) The triad of generalized seborrheic dermatitis, failure to thrive, and diarrhea in an infant should bring to mind Leiner disease or severe combined immunodeficiency disease.
(19) These structures were concentrated in the perinuclear regions of peripheral muscle nuclei and were less abundant about the triad regions.
(20) A liver biopsy was performed in one patient 8 months after total pancreatectomy and islet autotransplantation; numerous clusters of islet cells staining strongly for insulin and glucagon were detected within portal triads on both wedge and needle biopsy specimens.