COA of Formula: C10H10ClNO. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: 1-(4-Chlorophenyl)pyrrolidin-2-one, is researched, Molecular C10H10ClNO, CAS is 7661-33-8, about Decrease in intestinal permeability to polyethylene glycol 1000 during development in the pig. Author is Westroem, B. R.; Tagesson, C.; Leandersson, P.; Folkesson, H. G.; Svendsen, J..
Changes in intestinal permeability during postnatal development in the pig were investigated by using different-sized polyethylene glycols (PEGs) in the Mr 766-1338 range (PEG 1000) as permeability probes. Pigs of varying age, newborn (0 h), 36-45 h old, and 22-28 days old, were gavage-fed PEG 1000 together with the macromol. markers bovine serum albumin, ovalbumin, or FITC-labeled dextran 70,000. The 4-h blood serum concentrations of the different markers were determined and taken as an estimate of their intestinal transmission. In the newborn pigs, high serum levels of PEGs were obtained, concomitant with high serum levels of bovine serum albumin and FITC-dextran. After intestinal macromol. closure in the 36-45 h-old pigs, lower serum PEG levels were found, especially of those with a Mr > 1100 Da. In the 22-28 day-old pigs, PEG levels were reduced to ≤10% of those in the 36-45-h-old pigs, with the levels decreasing markedly with increasing mol. size. These results show that there is a correlation between the intestinal permeability of PEGs, especially those >1100 Da, and macromols. in the newborn pig around intestinal closure, suggesting that such PEGs traverse the gut by the macromol. route. During later development, further intestinal maturation results in a markedly reduced permeability to PEG 1000.
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