Effect of caloric content and composition of a liquid meal on gastric emptying in the rat.

We examined the effect of caloric content and substrate composition on gastric emptying in conscious Sprague-Dawley rats using gastric radioscintigraphy. Three-milliliter volumes of normal saline, glucose, casein hydrolysate, or intralipid containing 0, 1, 2, 3, or 6 kcal labeled with 99mTc-diethylenetriaminepentaacetic acid were given intragastrically. Gamma-camera imaging and computer analysis allowed construction of gastric emptying curves constructed over many time points for each emptying study.

Prospective analysis of electrocardiographic variables as markers for extent and location of acute wall motion abnormalities observed during coronary angioplasty in human subjects.

To assess the usefulness of different electrocardiographic variables as markers for the presence, extent and location of new wall motion abnormalities seen after sudden controlled coronary occlusion, 23 patients with isolated left anterior descending (n = 12), or right (n = 11) coronary artery disease and a normal baseline left ventriculogram were prospectively studied during transluminal coronary angioplasty. A simultaneous 12 lead electrocardiogram was recorded before passing the balloon catheter and again at 30 seconds into the fourth inflation cycle. Using a second arterial catheter, a left ventriculogram was obtained at 40 seconds into the fourth inflation cycle.

Effect of iso-propyl-thio-beta-D-galactoside concentration on the level of lac-operon induction in steady state Escherichia coli.

In steady state E. coli cells growing at their maximal rate in broth, maximum induction of beta-galactosidase occurs at 0.10 mM isopropyl-thio-beta-D-galactoside (IPTG).