Sample-generating activity

A Anaerobic adaptation was obtained by flushing the cells with argon. At indicated time points, samples were taken to measure the in vitro Fk-ase activity of C. reinhardtii (box), S. obliquus (circle), C. fusca (triangle), C. moewusii (diamond). While the activities of both Scenedesmus species are comparative low, the in vitro H -production rate of anaerobically induced C. moewusii cultures is 2 times higher than the activity of induced C. reinhardtii cultures. B Northern blots with equal amounts of total RNA isolated from an anaerobically adapted culture (2 h) and an uninduced reference culture (0 h) of C. moewusii. The upper blot was incubated with a RNA sample of the 3 UTR of the hydA 1 cDNA, while the lower blot was incubated with a RNA sample generated of the cDNA from the constitutively expressed sedoheptulose 1,7-bisphosphatasegene. 

We have observed similar IR bands (1520, 1352 and 1295 cm ) on the Pt wire/ FSM-16 sample in an in situ IR study of the PROX reaction. From these results, we propose that the selective CO oxidation in the PROX on Pt wire/FSM-16 proceeds through the reaction of a carboxyl intermediate (COOH) on Pt nanowires (and particles) supported on FSM-16 with active OH groups (Figure 15.26). CO reacts with an active silica surface OH of FSM-16 to convert the HCOO intermediate on Pt wires and particles into CO2, thereby leading to selective CO oxidation. The subsequent H2/O2 chemisorption generates active surface OH groups near the Pt wires and particles on FSM-16. Smaller HCOO intermediates due to the smaller OH interaction on Pt particle/HMM-1 and Pt necklace wire/HMM-1 may reflect in their lower TOFs and lower CO selectivity in the PROX reaction (Figure 15.25a and b). 

Preliminary Property Measurements. Preliminary measurements of second harmonic generating activity on powder samples of Py-D3C, segregated by grain diameter, determined that X for the material is 1/85 20% that of quartz. These measurements also indicated a coherence length at least as long as that of quartz. 

The role of analytical technologies traditionally has been to respond to a pharmaceutical event, rather than to lead one. A complementary perspective from an analytical point of view can provide substantial insight into relevant drug development issues. This insight may not be intuitively obvious from a sample-generating (i.e., chemistry, biology) approach. And, when sample analysis activities are taken into consideration as an equal partner with sample-generating... 

Open-access MS systems provide an effective means for maintaining the high-throughput characterization of synthetic compounds. These systems offer an efficient laboratory- to bench-scale integration of sample generation and analysis activities. Advances in analytical instrumentation and electronic communication have also played a major role in the emergence and acceptance of MS as a front-line tool for structure characterization. 

Thus, in thermally activated MgO, and presumably in other oxides thermally activated that do not show F and S centers, we have a completely different type of active center than in irradiated samples (F and S unpaired electron centers). What does this thermally generated active site look like And what does the hole left behind look like Very little has been established concerning these questions, except that it is very improbable that transition metal impurities play a role (23,24,27, 28,29). 

The events of 1997 had a major impact on research funding for HABS and spurred the adoption of molecular techniques for detection and monitoring of HAB species. Pfiesteria spp. can now be detected and identified in natural water and sediment samples and also at hsh kill events. The current data from these studies indicates a low abundance in nature for these species and no indication of involvement in any hsh kill event since 1998. While a toxic free radical generating activity has been described, the uniqueness to Pfiesteria spp. for this activity and the in situ detection of the activity have not been established. In contrast, K. veneficum has a worldwide distribution, and has been implicated in numerous hsh kill events around the world since 1950, a toxin has been isolated, its structure determined, and rigorously quantihed at specihc hsh kill events. Therefore, we present a scenario for the co-occurrence of K. veneficum and Pfiesteria spp., which explains the hsh kill events of 1997, and subsequent similar events attributed to Pfiesteria spp. The cause(s) for the proposed human health detrimental effects of these events are still unclear. 

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