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  • All fields: unidentified
(1364 results)



Display: 20

    • Page 16

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    • 12 GC/MS chromatographs of the ethyl acetate extraction of methamphetamine are shown in Figures 4-11. Peaks at 2.5, 4.1, and 5.9 and 6.7 minutes indicate the presence of DMS, methamphetamine, and two unidentified peaks by GC-MS respectively and are...
    • Page 26

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    • 20 Students Who Benefit from RTI Kamps et al. (2007) compared the effects of English language learners (ELL) receiving Tier 2 interventions to ELL students being taught using a balanced literacy approach to reading. The study found students...
    • Page 20

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    • 16 MS analysis in Figure 8 contains ion fragment peaks at 149.0, 91.1, 74.1 (most intense) and 58.1 m/z corresponding to the GC peak at 5.9 minutes (1.48%), indicates unidentified peak A. Figure 8: GC-MS spectra of ethyl acetate extraction of...
    • Page 21

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    • 17 MS analysis in Figure 9 contains ion fragment peaks at 148.1, 117.1, 91.1 (most intense) and 56.1m/z corresponding to the GC peak at 6.7 minutes (5.45%), indicates unidentified peak B. Figure 10 illustrates the GC chromatographs of the extracted...
    • Page 23

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    • 19 Figure 11: TIC chromatograph of ethyl acetate extraction of methamphetamine. GC peaks at 5.8 and 6.7 minutes correspond to unidentified impurity peaks A and B. Impurity A Impurity B DMS Methamphetamine
    • Page 24

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    • 20 Impurities A and B were not seen until the injection port liner reached 21000 hours of operation (n=3080). Injection port liner was replaced after an additional 4000 hours of usage and 120 additional samples (n=3200) (Figure 12-13). Figure 12:...
    • Page 27

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    • 23 methamphetamine, which, facilitates the elimination of an amine or the formation of amphetamine. Because injector temperature was above 200 ºC (Figure 12), chemical derivatization was not performed on the samples, and methamphetamine samples...
    • Page 15

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    • 5 W.A. Mozart and the Salzburg Hauptbanhof train station. These restrictions were due to time constraints and economic feasibility. Limitations Several procedural limitations should be considered when reviewing the results of the study: 1....
    • Page 76

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    • Paragonah, through Bear Valley and over into the Sevier Valley, following ri well-estahlished wagon road. The complete list of officers is not known, hut Silas S. Smith was sustained as captain with Robert Bulloch as Assistant Captain. The old...
    • Page 9

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    • Apologia, Antapologia and Political Power 5 published the photo on his website the next day. Immediately, Weiner’s staff stated in a press release that his account had been hacked and that the photo was a hoax. However, the damage was done. For...

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