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Hace 5 días · We have a Janus automated liquid handling system that we have been trying to set up for a DNA extraction protocol. We have been running into some issues though and were wondering if anyone had any insight. (1) The first issue we encountered was programming a step for supernatant removal.
Hace 5 días · The FTIR analysis of blends was performed by a Perkin Elmer-Spectrum BX FTIR spectrophotometer between 400 and 4000 cm −1. The FTIR spectra of HDPE blends prepared with various amounts of PANI are shown in Figure 5.
Hace 15 horas · FT-IR spectrophotometer (Perkin Elmer, Spectrum 100) equipped with beam splitter (KBr) and DTGS (deuterated triglycine sulphate) detector was used for the purpose.
Hace 15 horas · (model 3300; Perkin–Elmer, W ellesley, MA, USA), whereas the arsenic concentration was measur ed using atomic fluo- rescence spectroscopy (model AFS-930; Jitian, CITY , China).
Hace 15 horas · Melting points were determined on a Koffler block and are uncorrected. A Perkin Elmer-USA Spectrometer was used for recording FT-IR spectra using KBr discs at room temperature within the wave number range of 4000 to 400 cm −1. 1 H-NMR was recorded on a JEOL JNM ECA 500 MHz instrument (JEOL Ltd., Tokyo, Japan) using in DMSO-d 6 as a solvent at ...
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Hace 5 días · 2.3 cAMP-Induced cGMP Formation. 1. Starved Dictyostelium cells. Collect starved cells by centrifugation for 3 min at 500 g, wash cells with PB, and resuspend cells in PB at a density of 2 × 10 8 cells/mL in PB; bubble air through the cell suspension for 10 min at a rate of about 15 mL air per mL suspension per min. 2.
