neutral species

neutral species

[′nü·trəl ′spē·shēz]
(chemistry)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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This is related to the pKa values of SMX (1.6 and 5.7), so that the antibiotic will be predominantly present as a neutral species with pH between its pKa values.
Now, a concept of two different atomic subsystems offers a simple solution to these puzzles if we assume that [H.sup.+](2) is a part of a subsystem H(2) that includes also a neutral species [H.sup.0](2), dominating in intrinsic and n-type Si (which implies that the donor level of H(2) is below the midgap).
They assumed that the combustion mixture consisted of a set of neutral species and an adiabatic flame temperature of 2200 K for a near-stoichiometric propane-air mixture at a pressure of 1 atmosphere.
It is concluded that neutral species (BzV) oxidized back to BzV+, without reacting with bCD.
Bis-p-MPPE was the preferred substrates because with bis-p-MPPE the neutral species is the most reactive species (Behme et al., 1965).
It occurs in inorganic and organic compounds; as trivalent (III) and pentavalent (V) oxidation states; and as anionic, cationic and neutral species. In general, the methylated and other organoarsenic compounds are less toxic than inorganic arsenic, and pentavalent arsenic is considerably less toxic than the trivalent state.
The retardation by [[H.sup.+]] may be mainly attributed to the conversion of the more reactive neutral species of malic acid to less reactive protonated form.
Because of thermodynamic constraints, the doping process (ion ingress and egress) is associated with a transfer of neutral species such as solvents and salts (analogous to osmosis) across the interface between the polymer and its medium of exposure.
In (C[O.sub.2] + MDEA +[H.sub.2]O) system, two neutral species, MDEA and [H.sub.2]O, and two ionic species, [MDEAH.sup.+] and H[CO.sup.-.sub.3] in the equilibrated liquid phase, have been considered.
Saturation techniques can provide very good results in the case of neutral species like HTO and anionic species (not with high density samples), but they are extremely time consuming for strongly sorbing cationic species or anionic species when using high dry-density samples.