Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Panels A and C: 1H spectra acquired from the perfusion media flowing through cell-free packed microbeads (A: 0 ml/min; C: 125 ml/min); panels B and D: 1H spectra acquired from perfused microbeads with attached cells (B: 0 ml/min; D: 125 ml/min); panels C and D have 10x vertical scale expansion. A 10-Hz line broadening exponential apodization function was applied before Fourier transformation.
