The Doyle Group – UCLA Chemistry Group
The Doyle Group – UCLA Chemistry Group
transparent EPA VOA vials with high quality Perkin Elmer transparent EPA VOA vials for wholesales Chrominex-Voa Vial 100pcs EP Scientific Clear EPA VOA Open Top Vials, 40 mL Thomas Scientific 9-093-2 Clear Borosilicate Glass VOA Vial with White Polypropylene 24-414mm Open Top Closure and 0.100" PTFE/Silicone Septa, Precleaned, 60mL Capacity
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Jun 1, 2012 · Separation of unsaturated organic compounds using silver-thiolate chromatographic material. Separation of organic compounds containing various numbers of double bonds (DB) can be readily achieved by using silver ion impregnated silica gel, often called silver-ion or argentation chromatography.
In this paper, high-speed counter-current chromatography (HSCCC), assisted with ESI-MS, was first successfully applied to the preparative separation of three macrolide antibiotics, brefeldin A (12.6 mg, 99.0%), 7'-O-formylbrefeldin A (6.5 mg, 95.0%) and 7'-O-acetylbrefeldin A (5.0 mg, 92.3%) from the crude extract of the microbe Penicillium
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23243: red PTFE/white silicone, diam. × thickness 8 mm × 0.060 in., for use with Screw Top vial, 2mL, 4.6mm I.D., 8-425 thread, pkg of 1000 ea
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Thermo Scientific™ Septa for 8-425 Screw Thread Caps are constructed of PTFE, PTFE/rubber, or PTFE/silicone to suit a variety of HPLC, GC and IC applications. Choose from Thermo Scientific™, Thermo Scientific™ National™, and Thermo Scientific™ Chromacol™ brands.
Septa. A wide range of serrated and non-serrated septa, and sleeve stoppers are available for use as temporary closures for glassware joints, tubes, bottles, NMR tubes, ampules, and cannulation techniques in air-sensitive chemistry. To protect your valuable contents in the vessels or containers from the atmosphere, our range of septa provide