Pseudo-diatomic species

Molecules of the type HvA - BHy are sometimes discussed in a simplified manner as pseudo-diatomic species. Sensible results are obtained by this approximation if the... 

Louisiana coast (Dortch and Whitledge, 1992). Harmful algal blooms (HABs) have been linked with decreases in the Si N and Si P ratios (Smayda, 1990 Anderson et al., 2002 Ragueneau et al., 2005a,b), many of the more common bloom species consist of toxic dinoflagellates (Steidinger and Baden, 1984), prymnesiophytes (Lancelot et ah, 1987), and certain diatom species (e.g., Pseudo-nitzchia australis) (Scholln et ah, 2000). 

In 1987, the first confirmed case of a naturally occurring neurotoxic diatom bloom was reported in Prince Edward Island, Canada, later confirmed to be caused by the production of domoic acid from the pennate diatom Nitzschia pungens, now renamed Pseudo-nitzschia multiseries (Bates et ah, 1989 Subba Rao et ah, 1988). Since this first outbreak, many (but not aU) species of Pseudo-nitzschia have been confirmed to produce domoic acid (as well as some species of Amphora and now Nitzschia (Kotaki et ah, 2000) see Bates, 1998, 2000, for a summary). These potentially toxic species include P. multiseries, P. pseudodelicatissima, P. delicatissima, P. seratia, P. australis, P. pungens, and P.fraudulenta, although it is apparent that not aU species are toxic in aU locations, nor are individual strains toxic under aU conditions. 

Figure 15-1 Total pressure dependence of the best pseudo-first-order kinetic rate constant when a first-order rate law approximates a Hougen-Watson model for dissociative adsorption of diatomic A2 on active catalytic sites. Irreversible triple-site chemical reaction between atomic A and reactant B (i.e., 2Acr - - Bcr -> products) on the catalytic surface is the rate-limiting step. The adsorption/desorption equilibrium constant for each adsorbed species is 0.25 atm. ...

Planktonic diatoms are abundant in ECS, with Pseudo-nitzschia deli-catissma, P. pungens, and Melosira sulcata being the dominant species (Gao et al., 2003). Phytoplankton abundance was low (<5x10 cells/L) in the coastal areas, where the SPM was high (>100 mg/L), and the dominant species are... 

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