(a.) Of or pertaining to tin; derived from or containing tin; specifically, designating those compounds in which the element has a higher valence as contrasted with stannous compounds.
Example Sentences:
(1) At any pH below 9, the two sols stained proteins in the outer hydrophilic leaflet of esterified cells with relative selectivity, but the alpha-stannic acid showed them more accurately.
(2) The stannic porphyrins, in particular tin protoporphyrin and tin mesoporphyrin, have been proposed for this purpose because these compounds competitively inhibit heme oxygenase, the rate-limiting enzyme in the heme-degrading pathway.
(3) Colloidal alpha-stannic acid and a negative iron colloid obtained from ferric hydroxide and potassium ferrocyanide, both negative sols being stable within a wide pH range, were refined as surface protein electron markers.
(4) The tested doses were 20 micrograms and 10 micrograms of stannic chloride and 1 microgram and 0.5 microgram of trimethyltin chloride.
(5) The results indicate that the favorable half-life and decay characteristics of tin-117m in various stannic compounds, especially stannic-DTPA, make it potentially useful as an agent for skeletal scintigraphy and radiotherapy of bone tumors.
(6) Stannous or stannic chlorides reduced the growth rate of K. aerogenes, Ps.
(7) Several alkyl substituted 1-beta-D-ribofuranosyl-1,2-dihydropyrimidin-2-one derivatives were synthesized by the method of stannic chloride-catalyzed glycosidation method to elucidate their inhibitory activity of cytidine deaminase and also their antitumor activities in vitro and in vivo.
(8) For stannic chelates, higher bone uptake, faster blood clearance, and reduced soft-tissue concentration were observed.
(9) 1-beta-D-Ribofuranosyl-5-methylimidazole-4-carboxamide was obtained by deacetylation of the corresponding tri-O-acetyl nucleoside 11 or by deacetylation and ammonolysis of the blocked ethyl 5-methylimidazole-4-carboxylate nucleoside 10, which was prepared from the stannic chloride catalyzed condensation of the trimethylsilyl derivative of ethyl 4(5)-methylimidazole-5(4)-carboxylate.
(10) The maximum concentrations which reduced the replicative index by about 50%, of stannic chloride and trimethyltin chloride were 40 micrograms and 2 micrograms per culture respectively.
(11) Individuals responsible for occupational health should be aware that relatively benign substances, such as stannic chloride and water, can combine spontaneously to form hazardous substances.
(12) The industrial hygiene survey, conducted when stannic chloride use had been reduced, cleaning had been done, and ventilation improved, focused on measuring air contaminants that might possibly cause symptoms.
(13) Direct glycosylation of the trimethylsilyl derivative of 8 with 1-O-acetyl-2,3,5-tri-O-benzoyl-beta-D-ribofuranose in the presence of stannic chloride, followed by debenzoylation, gave the guanosine analogue 2-amino-8-(beta-D-ribofuranosyl)imidazo[1,2-a]-s-triazin-4-one (12b), which on deamination gave the xanthosine analogue 13.
(14) Vanadate at 2 mM, 2 microM carbonyl cyanide 4-(trifluoromethoxy)phenylhydrazone (a metabolic uncoupler), or 2 microM stannic chloride all markedly enhanced lead entry into brain, as did a more alkaline pH (7.80).
(15) Reaction of the trimethylsilyl derivative of 2,3-dihydro-6H-1,3-oxazine-2,6-dione (2, "uracil anhydride") with protected 1-O-acetylribofuranoses in the presence of stannic chloride gave the corresponding block nucleosides.
(16) Compound 6 was obtained by reaction of 7-nitroimidazo-[4,5-b]pyridine with 1,2,3,5-tetra-O-acetyl-beta-D-ribofuranose in the presence of stannic chloride followed by treatment with methanolic ammonia.
(17) It has been shown that oxygen interferes with the reduction process by oxidizing stannous ion, Sn(II), to stannic, Sn(IV), thereby leaving less Sn(II) available for the reduction of pertechnetate ion.
(18) Barium sulfate, calcium carbonate, cupric oxide, ferric oxide, heavy magnesium oxide, and stannic oxide merited more detailed study.
(19) Acyclonucleoside esters 6-8 were prepared by the stannic chloride catalyzed reaction of methyl chloro[2-(phenylmethoxy)ethoxy]acetate (5) with various silylated pyrimidines, generated in situ from the bases and bis(trimethylsilyl)acetamide.
(20) The condensation of per(trimethyl)silylbarbital and -phenobarbital with 1,2,3,4,6-penta-O-acetyl-beta-D-glucopyranose in the presence of stannic chloride in dichloroethane gave moderate yields of the beta-coupled barbiturate N-D-glucopyranosyl derivatives.
Tetravalent
Definition:
(a.) Having a valence of four; tetratomic; quadrivalent.
Example Sentences:
(1) The oxidative properties of Vv can be used in the photocolorimetric determination of those reducers which give no other reactions with vanadium ions-penta and tetravalent.
(2) (which gives different products) but is attributed to an oxidizing intermediate resulting from the two electron oxidation of Fe2+ to a peroxo complex, or a derivative of tetravalent iron.
(3) The retention of the tetravalent and pentavalent vanadium forms was also investigated 1 d after oral administration.
(4) Two different tetravalent polysaccharide vaccines against group A, C, Y, and W135 meningococci were given to 118 infants aged 6 to 23 months; the same vaccines were administered in a second dose 12 months later to those infants aged 6 to 11 months at first vaccination.
(5) The cytostatic and cytocidal effects of a newly synthesized tetravalent platinum drug (CBDCA-ox) on two experimental ascites tumors as well as on normal tissues of the mouse were investigated.
(6) The data suggest that aldehydes formed during the process of lipid peroxidation induced by tetravalent vanadium react with the proteins in LDL to form fluorescent chromolipids and that the oxidative process originates within the hydrophobic domain of LDL.
(7) For a model experiment, artificial phospholipid membranes have been used to study the effect of uni-, di-, tri- and tetravalent cations on the adhesion process.
(8) Succinylated-Con A (bivalent) binds to the same receptors as native Con A (tetravalent) but does not elicit lamellipodium extension unless crosslinked with anti-Con A IgG.
(9) The effects of tetravalent conconavalin A and its succinylated derivative on the intracellular production of superoxide anion (O-2) and its release into cell exterior of peritoneal macrophages were observed.
(10) We conducted a prospective randomized double blind study to determine: (1) the safety and immunogenicity of live oral tetravalent human-rhesus rotavirus reassortant vaccine in neonates; and (2) whether a second dose at the age of 6 to 8 weeks enhances the immunogenicity.
(11) Opsonic and bactericidal functions of serum were examined in the half-brother after immunization with tetravalent meningococcal vaccine.
(12) Conformational alterations induced in DNA by the binding of various bivalent and tetravalent platinum complexes were characterized by means of differential pulse polarography and circular dichroism spectroscopy.
(13) The binding of tetravalent concanavalin A to the surface glycoproteins of macrophages caused a marked increase in the rate of oxygen consumption due to the activation of the hexose monophosphate shunt.
(14) It is shown that the process of DNA condensation becomes spontaneous in the presence of divalent cations in methanol, and in the presence of tri- or tetravalent cations in water media.
(15) Such prevalence is lower than the one rated in the civil population, demonstrating the major importance of vector control to limit spreading of such an epidemic as a tetravalent vaccine is not yet available.
(16) Anti-CR2 antibody HB5, tetravalent P13, and P28 conjugated to BSA, enhanced the ability of F(ab')2 fragments of the IgG fraction of goat anti-human mu antibody to increase human B cell [Ca2+]i.
(17) This results suggest a possible positive influence of tetravalent vanadium on the stability of cell membranes.
(18) Also hemotoxicity of this tetravalent drug was markedly lower than that of CBDCA.
(19) While the stimulatory effect of vanadate, an anion of pentavalent vanadium, on adenylate cyclase (AC) has been repeatedly demonstrated in various tissues only a few studies have been hitherto devoted to the effect of vanadyl, a cation of tetravalent vanadium, but these have provided contradictory results.
(20) PFRAP results reported here show that: (a) most clustered AChR (approximately 86%) are rotationally immobile within a time scale of at least several seconds; and (b) most nonclustered AChR (approximately 76%) are rotationally mobile with characteristic times ranging from less than 50 ms to 0.1 s. External cross-linking with the tetravalent lectin concanavalin A immobilizes many nonclustered AChR.