These colorless linear tetrapyrroles arise from FCCs by a spontaneous, acid-catalyzed isomerization[ 12, 13] and are essentially photo-inactive in day light.
Thermodynamic analysis revealed that the adsorption processes were spontaneous, and Acid Orange II adsorption was endothermic, while Acid Fuchsin adsorption was exothermic.
Spontaneous lactic acid fermentation is an important process in cereal processing.
The Enterohemorrhagic strain designated E. coli O157 H7 (ZP250), a spontaneous nalidixic acid mutant of an outbreak strain isolated from apple juice (RM1484) [58], [59].
One-week-old birds were orally inoculated with 5x10 bacteria from the S. Enteritidis phage type 4 (PT 4) strain 1009, which is a spontaneous nalidixic acid (NA) and streptomycin (SM) resistant mutant strain.
Briefly, K. pneumoniae Kp52.145 or its pld1 mutant cells grown overnight on an agar plate were resuspended in LB, normalized to OD600 of 0.5 and mixed at a ratio of 5 1 with a spontaneous nalidixic acid (nal) resistant mutant strain of E. coli MG1655.
We then tested for spontaneous hypopharyngeal gastric acid reflux by performing EBC pH testing in patients suspected of having acid reflux cough based on history and physical examination.
Acidic environment of tumor are suggested suitable site for EPR and cleavage by hydrolytic enzymes (e.g., cathepsin, MMPs, etc)., or spontaneous cleavage of acid labile bonding (e.g., hydrazone, ester bonds) between linker polymers and desired drugs.
With increasing pH, the enhancement factor increases at first due to the spontaneous dissociation of acid, at higher pHs due to gradual elimination of the mass transfer resistance in the continuous phase.
The last step in γ-decalactone biosynthesis involves the cyclation of the molecule either by an enzyme with alcohol acyl-transferase activity or by spontaneous lactonisation under acid conditions [ 48].
