| The hydrogen cation, one of the most common ions in the universe, is just a lone proton. |
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| One, DOTAP, is an amphipathic cation consisting of oleic acid chains esterified to a trimethylammonium moiety. |
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| It is called a cation if a positive charge exists and an anion if a negative charge exists. |
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| The actual formula of the ionic compound will thus depend on the relative charges of the anion and cation. |
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| Calcium was nearly unaffected and, under potassium limitation, it represented the major cation in xylem sap. |
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| Electrophilic addition of the t-butyl cation to isobutylene completes the process and regenerates the t-butyl cation. |
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| The cation binding has been explained in terms of specific chemical binding to these negatively charged groups. |
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| This ready access coupled with the ability of the anion to interact effectively at any site on the cation makes ionic reactions very fast. |
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| When two atoms swap electrons to produce a cation and an anion, the two ions are attracted to each other. |
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| For example, certain spots in a crystal lattice may remain vacant, or a lattice may have an unequal number of anion and cation sites. |
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| On the other hand, the viologen radical cation has a tendency to dimerize in a polar solution because of the poor hydrophilicity. |
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| When a metal is oxidized, it is converted from an uncharged atom to a cation by losing electrons. |
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| The key step in a unimolecular reaction is the formation of the carbon cation, or carbonium ion, by the departure of the leaving group. |
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| The results reveal that metal cation binding affects the protein conformation, the retinal isomeric composition as well as lipid head groups. |
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| In steady state, the metal cation flux is constant across the diffusion layer and the anion and spectator ion fluxes vanish. |
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| However, the efficiency of this process is low because the positive charge from the guanine radical cation also migrates to the solvent. |
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| When the divalent cation dissociates from actin, the affinity of actin for nucleotide is greatly reduced. |
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| Precipitation of NCP occurs for a threshold of divalent cation concentration, and redissolution is observed for further addition of salt. |
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| The concentration of sodium cation in tears is ideally suited to cause gelation of the material when topically instilled in the conjunctival sac. |
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| Both SO4 and NO3 are largely unreactive in the mineral soils and therefore play a dominant role in controlling cation mobility. |
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| The correct choice of cation is very important because this influences the melting point, viscosity and electrochemical reductive stability. |
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| The cation capacities given here are potassium exchange capacities obtained by static loading. |
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| The cation exchange capacity of the soils was increased by compost amendment. |
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| Absorption and exchange of potassium using sodium or ammonium cycle cation exchange resin, orally and as retention enemia. |
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| Foie gras, symbol of both tradition and modernity, was at the center of this unifi cation. |
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| The interlayer cation, however, is readily replaced by other inorganic and organic cations. |
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| The researchers then developed a simple process for making the cation in a more direct way and determined the substance's structure using X-ray crystallography. |
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| The atom that loses electrons gains a positive charge, becoming a cation. |
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| Therefore, the basal spacing of vermiculite changes from about 10.5 to 15.7 Å, depending on relative humidity and the kind of interlayer cation. |
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| A water recirculation system was also included. This system cleans the polluted water by means of cation and anion exchange columns. |
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| As a rule cation resins are more resistant to fouling than are anion resins. |
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| The cation and anion bonded together are known as an ion pair. |
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| The cation exchanger is regenerated using acid, and the anion exchanger with caustic soda. |
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| Ion exchange resins exist in the form of cation exchange resins and anion exchange resins. |
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| In accordance with this embodiment, the dye cation formed from heterolysis of the leuconitrile color former is bleachable at high doses of actinic radiation. |
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| As the anion resin is lighter than the cation resin it rises to the top, while the cation resin falls to the bottom. |
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| For ions dissolved in water, the rapid exchange of water molecules around the cation usually provides the space for an anion to approach the cation. |
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| The cation is positively charged, and the anion is negatively charged. |
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| The AlO4 tetrahedra therefore carries a single negative charge which must be balanced by the presence a positively charged species or cation. |
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| The pharmacokinetics of metformin are largely determined by its active transport by key organic cation transporters. |
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| For the complete sequence of tests used for qualitative cation analysis, see qualitative inorganic analysis. |
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| The light-induced homolytical nitrogen-oxygen bond cleavage yields a radical cation of the aromatic heterocycle and an alkoxy radical. |
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| Pils JRV, Laird DA, Evangelou VP Role of cation demixing and quasicrystal formation and breakup on the stability of smectitic colloids. |
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| To keep the uranium in the cathodic compartment, the cell may have an impervious diaphragm membrane constructed of special cation exchange material. |
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| Apart from its ease of use, achieved through high and immediate dispersibility, it also resists pasteurization and UHT treatment, without causing any modifi cation. |
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| The material, manufactured by American Machine and Foundry, is known under the trade name AMF C-311 cation exchange membrane. |
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| Stretch modulates amiloride sensitivity and cation selectivity of sodium channels in human B lymphocytes. |
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| Special treatment technologies that have been found to be effective in removing 137Cs, 131I, 226Ra and 90Sr include reverse osmosis, anion and cation exchange and electrodialysis. |
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| It possesses the best agronomic features with cation aggregative and fixative properties and allows a better elaboration of the clay-humic system. |
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| A polyhedron consists of a central cation, typically silicon or aluminum in common minerals, surrounded by a regular tetrahedron or octahedron of four or six oxygen atoms, respectively. |
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| With inhibition of sodium reabsorption, a higher concentration of this cation reaches the distal segment of the nephron and provides a more favorable milieu for the exchange process. |
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| Ionic liquids typically comprise an organic, primarily nitrogen-containing but also phosphorus-containing, mainly heterocyclic cation and an inorganic anion. |
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| Bromine can also achieve high gold dissolution rates in the presence of a protonic cation. |
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| The flavylium cation is the parent of the anthocyanidines, substances that in chemical combination with sugars form the anthocyanin pigments, the common red and blue colouring matters of flowers and fruits. |
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| Ion exchange resin comes in two forms: cation resins, which exchange cations like calcium, magnesium, and radium, and anion resins, used to remove anions like nitrate, arsenate, arsenite, or chromate. |
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| Cationic surfactants that might upset the biodegradability test and the analytical procedure are eliminated by the cation exchanger placed above the anion exchanger. |
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| Magnesium is the second most plentiful cation of the intracellular fluids. |
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| The hydrogen cation is written as though composed of a bare proton, but in reality, hydrogen cations in ionic compounds are always more complex. |
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| Usually preslugs were injected to realize optimum salinity in the reservoir and also to control cation exchange. |
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| Divalent cation inhibition of hormone release from isolated adenohypophysial secretory granules. |
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| A comparative-study of lithium cation affinities of alcohols and ethers and proton affinities of lithium alkoxides. |
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| Another possible modification is to render the alkali metal cation organophiic by complexation with a crown ether. |
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| Antioxidant activity applying an improved ABTS radical cation decolorising assay. |
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| The desired glost temperature and the possibility of cation release from the glaze affects the degree of usefulness of lead oxide as a flux. |
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| Dicoumarol activates Ca-permeable cation channels triggering erythrocyte cell membrane scrambling. |
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| It is not some ospring of an electric eel and a giant squid, but the Welsh Government's electronic Supplier Quali cation Information Database. |
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| This is used as a soil conditioner which increases the soil's capacity to hold water and nutrients by increasing capillary forces and cation exchange capacity. |
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| But the silicon cation proved more difficult to make than the carbocation. |
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| Conversion of the water soluble mercuric cation to the water insoluble mercuric sulfide salt can significantly reduce the uptake of Hg by Lumbricus worms. |
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| After expression, we purified MutM using polyethleneimine precipitation, ammonium sulfate precipitation, cation exchange chromatography, and size exclusion chromatography. |
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| The Cation affair wasn't brought to light until March 1990, when Austin's nomination to become administrator of GSA came before the Senate. |
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| Cation exchange capacity of soil free of organic matter can arise from either pH-dependent charge or isomorphous substitution. |
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