The time required to get sufficient sample for titration is 15-30 min. Values on sulfates in exhaust with a catalyst car and a noncatalyst car agree well with literature data obtained by dilution tube and filtration techniques.
From core SC4, we extracted porewater for sulfur, chloride, trace and major element concentrations by centrifugation (5000 rpm for 60 min in argon-filled centrifuge tubes) and filtration (using 0.22 μm polycarbonate filters), and we measured wet sediment pH.
One night, a waiter revealed that, until recently, there had been an eel in the tank that committed suicide by swimming up a filtration tube.
A round piston was placed on the top of the PPGs inside the round tube after each filtration test.
Results: Using a tungsten target, increased tube potential and filtration can yield minimal beam hardening with improved exposure efficiency and contrast for various thicknesses of uncompressed breasts.
Investigated design parameters include combined SPECT/XCT system geometry, X-ray focal spot size, tube loading, kVp, filtration, and detector type to determine operating parameters for a novel quasi-monochromatic X-ray beam for use in X-ray computed mammotomography that would use a dose equal to that from dual view mammography and that could be combined in a dual-mode system with SPECT.
In short, 100 µg of recombinant human (rh) αB crystallin protein was mixed with 100 µl wash solution, followed by centrifugation in a filtration tube.
The NH2-reactive fluorescein and reaction buffer was added to the filtration tube, incubated 10 min at 37°C, followed by centrifugation and washing.
Anthraquinones were detected by boiling the test sample with 1 ml of H2SO4 in a test tube followed by filtration.
In these circumstances, the weight of the faecal material to be analyzed can be inferred by weighing the sediment in the tube (pellet) after filtration and centrifugation of the faecal sample [ 17].
