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Biomedical subjects

C Dolisi

Publications and source records attributed to C Dolisi.

At least 55 records · Page 3Linked to original sources
PubMed1979

[Acid-base changes across the rat jejunum, in vitro (author's transl)].

Everted sacs of rat jejunum are able to adjust to near 6.5 any solution whose pH is situated between 5.5 and 9.5. Beyond these limits the adjustment becomes incomplete. Changes in PCO2 and total CO2 associated with changes in mucosal pH-values suggest that bicarbonate or CO2-movements toward the jejunal lumen involved in this adjustment process are predominant.

Acid-Base Equilibrium↗
PubMed1979

[Effect of pH on the motility of isolated jejunal loops in dogs].

Thirty-Vella jejunal loops are perfused at a constant rate with solutions of variable pH (1.55-11.25). Net loop absorption and motility of the oral segment do not significantly vary between pH values of 2.2 to 10.0. At a more acid pH, there exists a strong increase in the amplitude of pressure waves accompanied by a decrease in their frequence.

Animals↗
PubMed1977

[Cardiovascular effects of S 2620 in dogs anesthetized with pentobarbital].

In the dog under pentobarbitone anesthesia, the intravenous infusion of 1 mg/kg S 2620 results in tachycardia and systemic arterial hypertension. The same attenuated effects are caused by a second injection of the drug after cervical vagotomy and chemoreceptors denervation. Tachycardia and peripheral vaso constriction can account for elevation of arterial pressure.

Animals↗
PubMed1976

[Synchronous electric activity with inspiration in the vastus lateralis muscle of the anesthesied dog breathing spontaneously].

In the dog, under chloralose or pentobarbitone anesthesia and breathing spontaneously, a muscular electrical activity of low voltage synchronous with respiration was observed in m. vastus lateralis. The mean maximum amplitude of this activity is inversely linked with respiratory rate. When the respiratory frequency is equal or exceeds 25 cycles per minute this activity disappears. Such a phenomenon seems to be related to the activity of the respiratory centre.

Anesthesia, General↗
PubMed1975

[Rhythmic patterns of food and water intake in the dog: preliminary study (author's transl)].

The spontaneous rhythmic patterns of food and water intake in the dog during periods of 24 hr have been studied under three experimental conditions: natural light, continuous light and artificial light with day and night sequences. Under natural light there is a rhythmic pattern in the frequency of food intake and the amount of food consumed. During the night, periods of food consumption are numerous and the amount of food ingested is significant. During the day both the number of periods of food intake and the amount of food consumed is less. Similar results were obtained under continuous light. Under artificial light, with day and night sequences, there is a tendency to equalize the amount of food consumed through the 24 hr. This produced a displacement of frequency curves. In these three situations there seems to be an important relationship between the amount of food consumed and the time intervals following periods of food intake. Generally, similar results were obtained for water intake.

Animals↗
PubMed1975

[Influence of eating modalities on water intake in dog (author's transl)].

Food and water intake of a dog which had free access to water were studied in three experimental circumstances: 1) Food given ad libitum. 2) Food given at fixed hours. 3) Food deprivation for four days followed by resumption of food intake. A) The results indicate the water intake follows a pattern, the profile, range and duration of which can be modified within 24 hrs. In spite of modifications related to food intake, a typical profile remains which suggests that water is taken according to a program which is at least partly indepdent of food intake. B) Under experimental condition 1, food and water intake were weakly related, probably revealing an acquired relationship between the meal weight and the water intake which immediately precedes and follows food intake. The correlation was strengthened when the dog was forced to eat only once a day (observation 2). On the contrary, after a period of starvation (observation 3) the previous relationship between meal weight and water intake lessens and others appear which suggest the action of direct mechanisms of shortage compensation as far as water and food are concerned.

Adaptation, Physiological↗
PubMed1975

[Respiratory stimulant effect of S 2620 in the dog anesthetized with pentobarbital].

In the dog under pentobarbitone anesthesia, the intravenous injection of 1 mg/kg S 2620 is followed by a significant increase in respiratory rate, PaO2 and pHa and by a large decrease in PaCO2. Cervical vagotomy and chemoreceptor denervation reduced and even abolished these effects. They can be induced again by a second intravenous injection or by direct instillation in the fourth ventricle. These results suggest a central action of the drug.

Anesthesia, General↗