show the following
resonance signals:HC=CHbond at 5.30 ppm,CH2O–COOH
bond at 2.574 ppm, a high signal at 1.30 ppm that belongs
to the hydrogen of methylene in the saturated lateral chain,
and a terminal –CH3 group at 0.857 ppm [15]. The 1H
NMR spectra of the samples and the standard are almost
identical, conferring that extracted intracellular compounds
are polyhydroxybutyrates (PHBs).