The problem. The problem was to yield neonate rats hypothyroid by treating pregnant female rats with propylthiouracil (PTU), and then to evaluate the problem solving ability and the changes in the brain of the hypothyroid ...

The Problem. Increased vascular resistance in the liver is a common symptom of established cirrhosis of the liver. This investigation measured changes in resistance during induction of cirrhosis, to determine whether ...

The problem: The purpose of this study was to determine if a given range of pentylenetetrazol doses differentially affected retention of a visual discrimination task in the rat as a function of time of administration after ...

The development of hypertension in normotensive Wistar-Kyoto (WKY) and borderline hypertensive rats (BHR) was studied by inhibiting the synthesis of nitric oxide, an endothelial-derived relaxing factor. The BHR is genetically ...

The problem. The present study was conducted to determine the temporal placement of licking in a concurrent schedule of reinforcement and to see how various changeover delays affect the temporal placement of licking. Procedure. ...

The problem. The Common Norway rat ("Rattus norvegicus") is a known carrier and shedder of "Leptospira" of the serotype "icterohaerrorrhagiae". This investigation was done to determine if the Des Moines wild rat population ...

Systolic blood pressures, basal metabolic rates, and circulating catecholamine levels were determined for hyperthyroid (TRX), hypothyroid (PTU), and euthyroid control (CON) rats. All three measurements were elevated in TXX ...

The problem. To determine the effects of degree of homogenization, on DNA, RNA, and protein content of nuclei isolated from rat liver. The procedure. Rat liver cells were broken with a Dounce homogenizer using variable ...