SPBS

Caffeine in coffee, tea, and soda is determined by a solid-phase microextraction using an uncoated silica fiber, followed by a GC analysis using a capillary SPB-5 column with an MS detector. Standard solutions are spiked with G3 caffeine as an internal standard. 

Department of Chemistry, St.Petersburg State University St. Petersburg 199034, Russia, sensor2000 VK5346.spb.edu... 

Malookhtinsky pr., 68, 195112, Saint Petersburg, Russia E-mail bourevestnik bourevestnik.spb.ru... 

St.Petersburg State University, Chemistry Institute Universiteskij pr 26, Stary Peterhof 198504, St.Petersburg, Russia E-mail konst km3241. spb.edu... 

Baradat, P., Michelozzi, R., Tognetti, M. L. and Khaldi, A. 1995. Geographical variation in the terpene composition of Pinus halepensis Mhl. Pages 141-158 in P. Baradat, W. T. Adams, and G. Miiller-Stark (eds.) Population Genetics and Genetic Conservation of Forest Trees, SPB Academic Press, Amsterdam. 

Typical operating conditions by GC and HPLC are listed in Tables 2 and 3, respectively. Anilides are separated using a weakly polar liquid-phase capillary column, such as SPB-1 or HP-5, which is prepared based on 5% diphenyl-95% dimethylpolysilox-ane for GC. For HPLC, ODS columns are used. 

Chlornitrofen in water samples was determined by GC/MS using an SPB-1 fused-silica capillary (15 mx 0.53-mm i.d., 0.5-pm film thickness), with the ionization... 

Bosma W, Kamminga G, De Kok LJ. 1990. Hydrogen sulfide-induced accumulation of sulfhydryl compounds in leaves of plants under field and laboratory exposure. In Rennenberg H et al., eds. Sulfur nutrition and sulfur assimilation in higher plants Fundamental environmental and agricultural aspects. The Hague, Netherlands SPB Academic Publishing, 173-175. 

In the Galaxy, we know 93 (3 Cephei (Stankov Handler 2004) and about 100 SPB-type stars (De Cat et al. 2004). They fall within the instability strips predicted by the theory. The K-mechanism driving pulsations in (3 Cephei and SPB stars strongly depends on the abundance of the iron-group ions in the driving zone at temperatures around 2 x 105 K (Dziembowski Pamyatnykh 1993, Dziembowski et al. 1993). Theoretical models predict that pulsations of (3 Cephei and SPB-type vanish for Z = 0.01 and Z = 0.006, respectively (Pamyatnykh 1999). 

Multiperiodic SPB stars were found in the whole range of the V magnitudes in the searched area. Unlike in the Galaxy, these stars populate the region of early B or even late O-type stars. 

Four multiperiodic [3 Cephei and eleven SPB stars were found in the SMC. There are also two monoperiodic short-period variables that are good candidates for / Cephei stars in this galaxy. 

There is considerable evidence that the release of 5-HT occurs by exocytosis, i.e. by the discharge from the cell of the entire content of individual storage vesicles. First, 5-HT is sufficiently ionized at physiological pH so that it does not cross plasma membranes by simple diffusion. Second, most intraneuronal 5-HT is contained in storage vesicles and other contents of the vesicle including SPB are released together with serotonin. By contrast, cytosolic proteins do not accompany electrical stimulation-elicited release of 5-HT. Third, the depolarization-induced release of 5-HT occurs by a calcium-dependent process indeed, it appears that the influx of extracellular calcium ions with or without membrane depolarization can increase the release of 5-HT. Calcium stimulates the fusion of vesicular membranes with the plasma membrane (see Chs 9,10). 

MAZELIS, M. Catabolism of sulfur-containing amino acids. In Sulfiir Nutrition and Assimilation in Higher Plants (L. De Kok, I. Stulen, H. Rennenberg, C. Brunold and W. Rauser, eds.), SPB Academic Publishing, The Hague. 1993, pp. 95-108. 

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