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Biomedical subjects

M Nesić

Publications and source records attributed to M Nesić.

8 recordsLinked to original sources
PubMed1997

Design of a method for in vitro studies of polymer adhesion.

In this paper we describe a modified intestinal perfusion technique for investigation of bioadhesion phenomena. This technique is an in vitro method with well standardized experimental conditions which measures the intestinal intraluminal pressure and its oscillation. This also allows the vitality of the intestinal segment used in the experimental to be checked. Our results suggest that the longest adhesion occurred with polyacrylic acid, in comparison with carboxymethylcellulose sodium and the shortest with hydroxypropylcellulose.

Adhesiveness↗
PubMed1996

[Voice frequencies in patients treated with chronic hemodialysis].

Stress effects on respiration and muscle tension are most likely to affect phonation and articulation; the acoustic parameters reflecting vocal indicators of stress are fundamental frequency, duration and intensity. The aim of this study was to explore the link between some psychosomatic states of patients on dialysis and physical parameters of the vowel "e". Fundamental frequency, intensity and duration of the vowel "e" produced before, during and after dialysis were investigated. The results showed that in the period before dialysis the fundamental frequency was greater, duration was longer and intensity was unchanged. This investigation showed that the changes of the parameters of voice were induced with the changes of psychophysiological states of the patients on dialysis. These patients were in the state of chronicle stress, but the period before the treatment was associated with special, anticipatory stress that induced greater fundamental frequency and longer duration of the pronunciation of the vowel "e".

Female↗
PubMed1995

The influence of prostacyclin (PGI2) on contractile properties of isolated right ventricle of rat heart.

The mechanism of the positive inotropic effect of prostacyclin (PGI2) (2.6 x 10(-6) mol/l) on the isolated right ventricle of rat heart was studied. Our results show that the positive inotropic effect of prostacyclin is produced indirectly through beta adrenoceptors and slow Ca2+ channels, because blockade of slow Ca2+ channels with verapamil (10(-6) mol/l) and beta adrenoceptors with propranolol (10(-6) mol/l) abolishes this effect. Alpha adrenoceptors do not mediate the action of PGI2.

Adrenergic alpha-Antagonists↗
PubMed1991

[Mortality in malignant hemopathies in Yugoslavia].

The authors have analysed the mortality of malignant haemopathies in Yugoslavia from 1978 to 1987. The standardized rate of mortality among all malignant haemopathies was from 6.5 to 7.2%000. These rates were higher in males (7.8-8.8%000), than in the females (4.8-5.9%000). The mortality of this group of malignant tumors shows a decreasing tendency, which is more evident in females than in males. Since Hodgkin's disease and lymphoid leukemia participate with about 50% in the structure of mortality from all malignant hemopathies, and for that reason, mortality from these two diseases is especially analysed. The standardized rate of mortality from Hodgkin's disease was between 1.7-2.5%000 (males 2.1-3.2%000; females 1.3-2.0%000). Mortality from this malignant haemopathy has a tendency of decreasing, which is approximately of the same intensity in both sexes. Mortality from lymphoid leukemia in the period between 1978 and 1987 was from 0.7 to 1.2%000 (males 0.9-1.7%000; females 0.5-1.0%000). The mortality trend from lymphoid leukemia shows a similar slight decrease in males and females.

Female↗
PubMed1990

[Retinoblastoma].

Basic elements of retinoblastoma were evaluated in a sample of 14 patients. The analysis of the sex distribution has revealed that a greater number of male children was affected by the disease (p = 0.64). The average age ranged from 2 months to 3.5 years. Usually the first visible symptom is a white pupillary reflex, while the first clinical findings show that there is a tumorous formation in the fundus. A significant correlation between the age of the patient and the length of his survival was found by Fisher's test, as well as between the laboratory findings of tumor cells in the optical nerve incision and the length of survival.

Child, Preschool↗