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Thought poor reasoning

This submarine vs. subaerial hypothesis for the origin of the two types of deposits (Kuroko deposits, epithermal vein-type deposits) can reasonably explain the difference in metals enriched into the deposits by HSAB (hard-soft acids and bases) principle proposed by Pearson (1963) (Shikazono and Shimizu, 1992). Relatively hard elements (base metal elements such as Cu, Pb, Zn, Mn, Fe) are extracted by chloride-rich fluids of seawater origin, while soft elements (Au, Ag, Hg, Tl, etc.) are not. Hard elements tend to form chloro complexes in the chloride-rich fluid, while soft elements form the complexes in H2S-rich and chloride-poor fluids. Cl in ore fluids is thought to have been derived from seawater trapped in the submarine volcanic and sedimentary rocks. [Pg.353]

In order to understand current approaches for prevention and control of biofilms, we must first consider the reasons for the failure of conventional antimicrobial protocols. There are thought to be three main reasons as to why biofilm bacteria out-survive their planktonic counterparts during antimicrobial treatments (reviewed by McBain et a/.16).These are i) poor penetration of antimicrobial compounds due to the presence and turn-over of exopolymer slime (glycocalyx) ii) the imposition of extreme nutrient limitation within the depths of the biofilm community and the co-incident expression of metabolically-dormant, recalcitrant phenotypes and (iii) the expression of attachment-specific phenotypes that are radically different and intrinsically less susceptible than unattached ones. [Pg.42]

The (3-blocker atenolol has received the most attention in studies of social phobia. Various reasons have pointed to using this agent over propranolol, which was the main dmg used in the early trials with nonclinical populations. Because atenolol is a polar, hydrophilic compound, it has a relatively poor ability to penetrate the blood-brain barrier. Thus, it is thought to have less potential to cause the depressogenic effects thought to be caused by more centrally acting agents, such as propranolol. [Pg.386]

At present, SSRIs are the most commonly prescribed first-line agents in the treatment of both MDD and anxiety disorders. Their popularity comes from their ease of use, tolerability, and safety in overdose. The starting dose of the SSRIs is usually the same as the therapeutic dose for most patients, and so titration may not be required. In addition, most SSRIs are now generically available and inexpensive. Other agents, including the SNRIs, bupropion, and mirtazapine, are also reasonable first-line agents for the treatment of MDD. Bupropion, mirtazapine, and nefazodone are the antidepressants with the least association with sexual side effects and are often prescribed for this reason. However, bupropion is not thought to be effective in the treatment of the anxiety disorders and may be poorly tolerated in anxious patients. The... [Pg.664]

It might be thought that this treatment would provide a poor approximation because of the neglect of polarization of each of the two ions in the electric field of the other.36 However, there is reason to think that the neglect of polarization does not introduce great error. First, the effect of multipole polarization as well as of the partial covalent character of the bonds is taken into account in the treatment of the crystals by the evaluation of the Bom exponent n from the observed compressibility and of the repulsion factor from the observed interionic distance. Second, in the gas molecule, in which there is dipole polarization mainly of the anion, its effect in causing increased attraction of the ions may be largely neutralized by the increased repulsion caused... [Pg.530]

A foam is a dispersion of a gas in a liquid or a solid medium. Some properties of foams resemble those of emulsions, which is not surprising because a foam can be thought of as an emulsion in which the dispersed phase is a gas. Foams are, to our knowledge, never thermodynamically stable, they can only be kinetically trapped. This may be one reason why a quantitative description of foams is only poorly developed. Very good introductions into the subject are Refs. [564-566],... [Pg.272]


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See also in sourсe #XX -- [ Pg.9 , Pg.22 ]




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