What's the difference between bivalent and stannous?
Bivalent
Definition:
(p. pr.) Equivalent in combining or displacing power to two atoms of hydrogen; dyad.
Example Sentences:
(1) Bivalent F(ab')(2) also retains its insulin-like effects.
(2) It could be demonstrated that equimolar doses of the bivalent alpha,N-(epsilon,N-DNP-aminocaproyl-)-epsilon,N-DNP-L-lysine and the multivalent dinitrophenylated bovine serum albumin were equally effective in eliciting reactions in skin sites provided that a high affinity antibody was used for sensitization.
(3) The function of the other bivalent cations is unknown.
(4) We interpret these experiments in terms of a theory of equilibrium binding of bivalent haptens to cell surface antibody that is presented in the previous paper.
(5) Bivalent cations (Ca2+, UO2(2+) or Zn2+) in the subphase at pH 5.6 significantly modified the behaviour of mixed monolayers of fusogenic lipids with phospholipids; there was a parallel perturbing effect of fusogenic lipids on interactions between monolayers of phospholipids and bivalent cations.
(6) In continuation of the research on male human meiosis within the study of pachytene bivalents, results from the analysis of 125 cells are presented.
(7) These oocytes contain 6 distinct bivalent chromosomes in diakinesis.
(8) In meiotic prophase of spermatocytes, chromosomes 2 and 3 form pachytene-diplotene bivalents whose arms may be associated by chiasmata in postdiplotene stages, but the X, Y and fourth chromosomes participate in a complex multivalent.
(9) Experiments indicated that complement deposition altered functionally bivalent IgG3 antibody in the immune complex into a univalent one.
(10) Low melittin concentrations (1-2 mcM) increased in several times the rate of H+, K+, Na+ ions and Tris transport, in a lesser degree--bivalent ions and Cl- transport and did not affect the permeability for succrose.
(11) The first two opioid peptide bivalent ligands with different spacer lengths containing different numbers of hydroxyl groups, (Tyr-D-Ala-Gly-Phe-NH-CH2-CHOH-)2 (Tyr-D-Ala-Gly-Phe-NH-CH2-CHOH-CHOH-)2, were synthesized and their binding to mu, delta, and kappa opioid receptors was characterized.
(12) The bivalent vaccine was completely attenuated for children.
(13) Bivalent cations such as Mg2+ and Zn2+ differentially affect their binding to oligonucleotides which contain the HIV-enhancer domain.
(14) The purified enzyme showed a pH optimum 8.5 (Tris-HCl buffer) and required bivalent cations for catalysis.
(15) A method of radioimmunoscintigraphy using bivalent "Janus" haptens with an apparent enhanced affinity ("avidity") for the antibody is described.
(16) Two monovalent CD3 antibodies with mixed heavy chain isotypes were very poor in lysis but, in contrast, a monovalent antibody possessing two identical rat gamma 2b heavy chains but two non-identical light chains was found to be more lytic with human complement than the parental bivalent CD3 antibody.
(17) It is concluded that reactive oxygen species, especially hydroxy radical, play a significant role on renal injury in bivalent hapten immune complex glomerulonephritis.
(18) Dissociation of the X-Y chromosome bivalent in diakinesis-metaphase I spermatocytes of adult mice was significantly more frequent in the CBA strain (29%) than in C57, KP, or KE strains (7-11%).
(19) It is suggested that bivalent ligand binding is required as a signal to elicit chemotactic locomotion.
(20) Results included the following: (1) lymphocyte stimulation responses to PHA and SPL were generally depressed in the CA patients versus controls; (2) incubation with indomethacin produced bivalent effects in both controls and CA patients, depending on the concentration of indomethacin and lymphocyte stimulant; incubation with optimum concentrations of indomethacin generally produced augmented responses in both study groups whereas high concentrations of indomethacin were suppressive; (3) the immune potentiating effects were not observed in older patients with advanced disease; and (4) removal of adherent leukocytes (mainly monocytes) also restored depressed lymphocyte responses.
Stannous
Definition:
(a.) Pertaining to, or containing, tin; specifically, designating those compounds in which the element has a lower valence as contrasted with stannic compounds.
Example Sentences:
(1) The most probable result of in vivi SnF2 application on sound enamel is the formation of a fluoridated hydroxyapatite together wity stannous complexes and amorphous CaF2.
(2) The effectiveness of three commercial bone scintigraphic agents and freshly made stannous chloride in labeling erythrocytes with 99mTc was compared.
(3) The titanium alloy strips were treated with citric acid, stannous fluoride, tetracycline HCl, chlorhexidine gluconate, hydrogen peroxide, chloramine T, sterile water, a plastic sonic scaler tip, and an air-powder abrasive unit.
(4) Using the stannous chloride method, under conditions to avoid the hydrolytic polynucleation of technetium, a good yield of 99mTc-KTS with characteristics resembling the non-charged, compact and stable Cu-KTS is obtained, in in vitro as well as in vivo studies.
(5) Although previously published animal data suggest utility of Tc-99m stannous phytate for lymph-node imaging, Tc-99m antimony sulfide was shown in this clinical comparison to provide a more reliable representation of lymph-node anatomy.
(6) Stannous fluoride toothpaste was used twice yearly for three years in supervised brush-ins by puplis at two Melbourne schools--one coeducational and one boys.
(7) Compound 9 was also obtained by condensation of 1 with 2,3,4-tri-O-benzyl-6-deoxy-6-fluoro-beta-D-glucopyranosyl fluoride (4) in the presence of silver perchlorate and anhydrous stannous chloride.
(8) Human autologous leucocytes can be simply and reproducibly labelled by phagocytic engulfment of technetium 99m stannous colloid with high leucocyte-labelling efficiency (LLE), similar human biodistribution to indium-111-oxine labelled leucocytes and good cell viability.
(9) The short-term bactericidal effect of 2% chlorhexidine gel, 4% stannous fluoride gel or amine fluoride gel containing 1.25% fluoride on the subgingival microflora was determined in 40 periodontal pockets of 10 patients.
(10) (4) In plasma, chemical reduction of selenite by stannous chloride was not observed.
(11) Stannous fluoride increased growth lag nad caused a much greater inhibition of growth rate than did sodium fluoride.
(12) The effectiveness of a stannous fluoride mouthrinse, when used once each school day, was investigated in a 3-year study.
(13) This report describes preliminary results using technetium-99m stannous phytate as a lymph-node imaging agent in animals.
(14) This study determined the effect of brushing with 0.4% stannous fluoride (SnF2) or 0.22% sodium fluoride (NaF) on clinical and microbial parameters associated with gingivitis.
(15) To determine the effect on periodontal health of a daily self-administered irrigation with 0.02% stannous fluoride (SnF2) solution, 28 subjects who had moderate to advanced periodontitis were randomly divided into 3 groups: a control group (n = 9) which used no irrigation, a group (n = 8) which used a self-administered water irrigation device (Water Pik) daily with water (H2O group) and a group (n = 11) which used the Water Pik in a similar manner but with SnF2 solution (SnF2 group).
(16) Plaque indexes for both stannous fluoride and placebo showed significant reduction (p < 0.0001) compared to baseline in all sites.
(17) Control of the age of the stannous chloride solution and the final pH of the 99mTc-Sn-pyrophosphate eliminated the undesirable uptake.
(18) Dentifrices which contained 0.5% ZCT or 0.4% stannous fluoride, had similar inhibitory effects on plaque.
(19) Because of the probability that stannous ions were deposited during the stannous fluoride treatments, some of the apparent calcium phosphate re-deposition in this group was probably stannous compounds.
(20) Finally, the absence of stannous ion in the 99mTc-TMA complex should avoid the problem of interference with other procedures involving pertechnetate 99mTco4- as the imaging agent.