Romanian journal of physiology : physiological sciences最新文献_第5页

Dynamic study of oxyhemoglobin in traumatic shock. 创伤性休克中氧合血红蛋白的动态研究。

Romanian journal of physiology : physiological sciences Pub Date : 1999-01-01

T Negru, G Lilios, N D Ceamitru, V Alexandrescu

引用次数: 0

The regularizing effect of some active substances upon uterine smooth muscle contractile activity. 某些活性物质对子宫平滑肌收缩活动的调节作用。

Romanian journal of physiology : physiological sciences Pub Date : 1999-01-01

A Neştianu, L E Neştianu, V Neştianu

{"title":"The regularizing effect of some active substances upon uterine smooth muscle contractile activity.","authors":"A Neştianu, L E Neştianu, V Neştianu","doi":"","DOIUrl":"","url":null,"abstract":"Our study concentrated upon the modifications of some parameters which characterize uterine smooth muscle contractile activity under the action of active substances. We studied the isotonic contractions of the uterine smooth muscle in a classical organ bath in which we introduced some contracting and relaxing substances. At the beginning, we introduced Oxytocin to determine uterine smooth muscle contractions. After that, we added relaxing substances (Papaverin, Diazepam, Terbutalin, Isoxuprin, Hexoprenalin) in the organ bath, and then, in another protocol, we added combinations of two relaxing substances. We determined for each wave some parameters: minimum, mean, maximum and net amplitude, wave area and duration, the interval between waves, the time while the curve increases from the minimal value of the amplitude to the maximum value, the frequency of contractile waves. For each parameter we determined the variance coefficient (C.V. %), which reflects the regularity of the uterine activity. We observed a regularizing effect of the uterine activity after administration of some active substances. The smallest variance coefficient (C.V. %) was found for HEXO + PAP combination (mean value for C.V. % is 4.71%).","PeriodicalId":79373,"journal":{"name":"Romanian journal of physiology : physiological sciences","volume":"36 1-2","pages":"81-5"},"PeriodicalIF":0.0,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21896447","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Determination of erythrocyte and platelet membranary permeability and its importance for the study of arterial pressure in physiological and pathological conditions. 红细胞和血小板膜通透性的测定及其在生理和病理条件下研究动脉压的重要性。

Romanian journal of physiology : physiological sciences Pub Date : 1999-01-01

N Baltă, R Gătina, M Ioan, C Teleianu, C Moisin

{"title":"Determination of erythrocyte and platelet membranary permeability and its importance for the study of arterial pressure in physiological and pathological conditions.","authors":"N Baltă, R Gătina, M Ioan, C Teleianu, C Moisin","doi":"","DOIUrl":"","url":null,"abstract":"The World Health Organization and the International Society of Hypertension continue to focus on assessing the cardiovascular risk of arterial hypertension and on developing a hierarchy of risk factors. Among the factors involved in the etiopathogeny of arterial hypertension, less attention has been given to the relations between the figurate elements of the blood (red cells and platelets) and the endothelial factors involved in vasomotricity. This motivates further research into the permeability of the erythrocyte and the platelet membrane in physiological and pathological conditions. Modern investigation methods have been employed in the study of a group of 100 patients with hypertension, both females and males, in various stages of the disease, who were compared with a group of controls. Results pointed to alterations of both eryhtrocyte and platelet membrane permeability dependent on the stage of the hypertensive disease and its complications. Despite the important individual variations that limit the diagnostic value of the investigations, they will contribute to an early diagnosis in the initial stages (I and II) of the disease and will point to the possibility of complications to occur. The correlations between alterations of platelet and erythrocyte permeability and the activity of gammaglutamyltransferase, the level of thiolic grouping and of cholesterol in the blood cell membrane provide additional information about the mechanism of interrelations between the latter and the vascular endothelial factors in physiological and pathological conditions such as arterial hypertension in various stages of evolution and its complications.","PeriodicalId":79373,"journal":{"name":"Romanian journal of physiology : physiological sciences","volume":"36 1-2","pages":"45-60"},"PeriodicalIF":0.0,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21896441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The adaption to environmental factors: hazard or programme. 对环境因素的适应:危害或规划。

Romanian journal of physiology : physiological sciences Pub Date : 1998-07-01

R Cârmaciu

{"title":"The adaption to environmental factors: hazard or programme.","authors":"R Cârmaciu","doi":"","DOIUrl":"","url":null,"abstract":"Any living structure, from cell to the entire organism, can adapt to internal or external factors only by triggering pre-existing mechanisms. All these mechanisms have a morphological support programmed within foetal inactive genes or adult genes with low activity. These genes are activated by a chain of reactions that usually starts with perceiving the stimulus at the membrane level and finishes with the synthesis of some proteins (enzymes, membrane receptors, etc.). The adaptative changes of the enzymatic and structural register would be impossible without the activation of genes other than those operating in normal condition. It is obvious that the same pre-existing genetic mechanism also functions in myocardial hypertrophy or neoangiogenesis. Actually, \"a genetic orchestra\" is ready to perform at a given moment the new tone suggested by the ever changing condition under which the myocardial fiber acts. However, the concept of programmed adaption has not only a theoretical value; in medical practice, the prediction, prevention and treatment of ischemic heart disease will benefit from the theoretic support of understanding the cardiac adaptative behaviour. It is obvious that this adaptation programmes cannot always save the heart from necrosis and the subject from death due to fatal arrhythmias or cardiogenic shock.","PeriodicalId":79373,"journal":{"name":"Romanian journal of physiology : physiological sciences","volume":"35 3-4","pages":"247-52"},"PeriodicalIF":0.0,"publicationDate":"1998-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21887934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research on red cell membrane permeability in arterial hypertension. 动脉高血压红细胞膜通透性的研究。

Romanian journal of physiology : physiological sciences Pub Date : 1998-07-01

R Gatina, N Balta, C Moisin, C Burtea, S Botea, M Ioan, C Teleianu

{"title":"Research on red cell membrane permeability in arterial hypertension.","authors":"R Gatina, N Balta, C Moisin, C Burtea, S Botea, M Ioan, C Teleianu","doi":"","DOIUrl":"","url":null,"abstract":"Arterial hypertension, including the elucidation of hypertension pathogenic mechanisms involving elements in the composition of the blood, continues to represent a topical research area. Recent work, such as nuclear magnetic resonance studies looking into red cell permeability, illustrates the presence of modifications of red cell permeability to water (RCPW) related to the stage of arterial hypertension. The identification of a significant increase of RCPW compared to that present in the population with normal arterial pressure values can be useful both in early diagnosis and in warning about a possible predisposition for this condition. At the same time, the dynamic investigation of protonic relaxation time of both intra- and extra-erythrocytic water, the assessment of proton exchange time across the red cell and the calculation of permeability to water enable one not only to diagnose arterial hypertension but also to ascertain the evolution of the disease, its complications and the effectiveness of anti-hypertensive medication. Our studies have also proven the existence of a correlation between the values of systolic arterial pressure and red cell permeability to water. The curve describing the interdependence of the two values has the shape of a bell, in the case of males. The peak of the curve is reached for a systolic pressure of 160 mmHg and gets below the values of the control group in the case of systolic pressures above 200 mmHg. The RCPW test can also be considered a valuable indicator in evaluating the risk of stroke in hypertensive patients. In the chronic therapy of arterial hypertension with various types of anti-hypertensive drugs, one can note differences in the RCPW values related to the effectiveness of the respective medication, to the clinical form and stage of the disease, the sex of the patient as well as to the existence of cerebro-vascular complications.","PeriodicalId":79373,"journal":{"name":"Romanian journal of physiology : physiological sciences","volume":"35 3-4","pages":"285-302"},"PeriodicalIF":0.0,"publicationDate":"1998-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21889816","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The scholar I. Athanasiu and his scientific work. 学者I. Athanasiu和他的科学工作。

Romanian journal of physiology : physiological sciences Pub Date : 1998-07-01

N A Constantin

引用次数: 0

References on Professor I. Athanasiu's contribution to the developement of physiology (a chronology of the works). 关于I. Athanasiu教授对生理学发展的贡献的参考文献(作品年表)。

Romanian journal of physiology : physiological sciences Pub Date : 1998-07-01

引用次数: 0

Newer issues on the topics of stress and of exercise physiology. 关于压力和运动生理学主题的最新问题。

Romanian journal of physiology : physiological sciences Pub Date : 1998-07-01

P Derevenco, R N Derevenco

引用次数: 0

The involvement of endogenous opiates in emotional-cognitive interaction in stress. 内源性阿片类药物在应激状态下情绪认知相互作用中的作用。

Romanian journal of physiology : physiological sciences Pub Date : 1998-07-01

F Dolcoş, C Strungaru, S M Dolcoş, E Turcu

{"title":"The involvement of endogenous opiates in emotional-cognitive interaction in stress.","authors":"F Dolcoş, C Strungaru, S M Dolcoş, E Turcu","doi":"","DOIUrl":"","url":null,"abstract":"Stress system is very important in the co-ordination of the generalised stress response, which takes place when a stressor of any kind exceeds a threshold. In our experiments we have analysed aspects of opiate involvement in the interactions among the emotional, motivational and cognitive processes, as well as aspects concerning the relations between physiological and behavioural mechanisms, both in normal conditions and under stress. We also analysed aspects of the interaction between stress system and endogenous opioid systems (e.o.s.). As emotional states interfere with perception and cognition, in our experiments we used suitable variants of the open-field test, which evaluates the exploratory drive and emotional reactivity. We used 30 Wistar male rats, 18 months old, weighing 350-400 g, divided into three groups, of 10 animals each. In order to assess the behaviour of the animals, we have analysed exploratory (cognitive) and non-exploratory (emotional) parameters. In order to evaluate the manner in which endogenous opioid systems are involved in these aspects, different groups of rats were treated with an opiate agonist (codeine syrup, 0.117, 5 ml/kg to approximately 0.5 mg/kg morphine as active compound, p.o.) and an antagonist (naloxone 0.4 mg/kg i.p.), before testing in open-field. To distinguish between the effect of habituation and the effect of the opiate agonist and antagonist, the placebo treatment and the test/retest method were used. At these doses, the opiate agonist has stimulated the exploratory behaviour, while the antagonist has inhibited the cognitive behaviour and enhanced the emotional response. Our experimental data together with data from literature allowed us to present an interactive model that points out a general manner of interaction between emotions and cognition, in relation to the interactions between physiological and behavioural mechanisms.","PeriodicalId":79373,"journal":{"name":"Romanian journal of physiology : physiological sciences","volume":"35 3-4","pages":"259-74"},"PeriodicalIF":0.0,"publicationDate":"1998-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21889813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Circadian rhythm of phagocytosis in mice. 小鼠吞噬的昼夜节律。

Romanian journal of physiology : physiological sciences Pub Date : 1998-07-01

M Hriscu, G Saulea, N Vidraşcu, I Baciu

引用次数: 0