during periods of control , hypoxia , and after discontinuation of the venoarterial admixture ( recovery ) , effluent perfusate was collected and mucosal biopsies were obtained for assay of lactase , maltase and sucrase activity , mucosal atpase activity and atp content , and for light- and electron microscopic examination .
C0852695
mucosal biopsies
C0026724
mucosal