Archives internationales de physiologie, de biochimie et de biophysique最新文献_第8页

Changes in blood ammonia induced by a maximum effort in trained and untrained subjects. 在受过训练和未受过训练的受试者中，最大努力引起的血氨变化。

Archives internationales de physiologie, de biochimie et de biophysique Pub Date : 1993-11-01 DOI: 10.3109/13813459309047000

D Vanuxem, S Delpierre, A Barlatier, P Vanuxem

{"title":"Changes in blood ammonia induced by a maximum effort in trained and untrained subjects.","authors":"D Vanuxem, S Delpierre, A Barlatier, P Vanuxem","doi":"10.3109/13813459309047000","DOIUrl":"https://doi.org/10.3109/13813459309047000","url":null,"abstract":"Twelve healthy male volunteers, either trained or untrained, performed a maximal exercise on a cycloergometer. Venous blood samples were taken for analysis during the effort and the following recovery. Blood concentrations of lactate and ammonia, and plasmatic concentrations of alanine, glutamate and glutamine were measured. At the beginning on the effort, ammonia decreased by 32% (P < 0.01) in comparison with its mean level at rest; at 77% and 78% of maximum load there was a steeper ascent of blood ammonia and lactate vs load curve. There was a high correlation (P < 0.001) between ammonia and lactate during exercise. At the end of the effort, these two variables had significantly increased in comparison with their values at rest (P < 0.01 for ammonia and P < 0.001 for lactate), but they did not correlate with VO2max. The negative correlation existing between ammonia and VO2max at the beginning of the recovery period may imply that muscle NH3 release is inversely proportional to the subject's sports training level, this relation being less evident when blood lactate vs VO2max correlation was considered. Increase in blood glutamate level was greater in trained subjects (P < 0.05). This finding suggests that ammonia elimination is favoured by physical training. In conclusion, ammonia measurements during exercise provide a valuable information about muscle cell oxidative capacity.","PeriodicalId":77008,"journal":{"name":"Archives internationales de physiologie, de biochimie et de biophysique","volume":"101 6","pages":"405-9"},"PeriodicalIF":0.0,"publicationDate":"1993-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3109/13813459309047000","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18518582","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: 3

Ca(2+)-ATPase and Mg(2+)-ATPase activities distinct from alkaline phosphatase in rat jejunal brush-border membranes. Ca(2+)- atp酶和Mg(2+)- atp酶活性与大鼠空肠刷缘膜碱性磷酸酶活性不同。

Archives internationales de physiologie, de biochimie et de biophysique Pub Date : 1993-11-01 DOI: 10.3109/13813459309046997

H Wang, M Gilles-Baillien

{"title":"Ca(2+)-ATPase and Mg(2+)-ATPase activities distinct from alkaline phosphatase in rat jejunal brush-border membranes.","authors":"H Wang, M Gilles-Baillien","doi":"10.3109/13813459309046997","DOIUrl":"https://doi.org/10.3109/13813459309046997","url":null,"abstract":"In rat jejunal brush-border membranes (BBM), ATP hydrolysis activity was specifically stimulated by CaCl2 and by MgCl2, allowing to identify Ca(2+)-ATPase and Mg(2+)-ATPase activities with a broad pH optimum near 8.0. Nonspecific ATPase activity (in the absence of cations) had a pH optimum above 9.5 as alkaline phosphatase. The effects of Ca2+ and Mg2+ concentrations on ATPase activity evidenced two apparent KA for each cation. At high concentrations, a similar affinity for both cations was recorded (KA: 0.35 mM). At low concentrations, the affinity for Mg2+ was greater than for Ca2+ (KA: 0.02 mM and 0.07 mM respectively). In an attempt to differentially solubilize alkaline phosphatase and ATPase activities, eleven different detergents were assayed. They more or less successfully released Ca(2+)-ATPase and Mg(2+)-ATPase activities from BBM but the more membranes were solubilized by a detergent, the more activities were lost, suggesting a close dependence on integration in BBM. As to alkaline phosphatase and nonspecific ATPase, they almost co-solubilized with Ca(2+)-ATPase and Mg(2+)-ATPase but their total activity was little affected. After treatment of BBM with phosphatidylinositol-specific phospholipase C (E.C. 3.1.4.10), 58% of alkaline phosphatase activity and 45% of nonspecific ATPase activity were released in the supernatant while Ca(2+)-ATPase and Mg(2+)-ATPase activities remained totally incorporated in BBM pellets. These last results definitively demonstrate that Ca(2+)-ATPase and Mg(2+)-ATPase activities are not manifestations of alkaline phosphatase, as earlier suggested, but rather result from the existence of one or several intrinsic membrane enzymes.","PeriodicalId":77008,"journal":{"name":"Archives internationales de physiologie, de biochimie et de biophysique","volume":"101 6","pages":"387-93"},"PeriodicalIF":0.0,"publicationDate":"1993-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3109/13813459309046997","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18521395","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: 3

[In vivo effects of 24R,25-dihydroxyvitamin D3 on kidney alkaline phosphatase and gamma-glutamyltransferase of hypophysectomized rats]. [24R,25-二羟维生素D3对去垂体大鼠肾脏碱性磷酸酶和γ -谷氨酰转移酶的体内影响]。

Archives internationales de physiologie, de biochimie et de biophysique Pub Date : 1993-11-01 DOI: 10.3109/13813459309046994

T X Do, A Girault, M Prelot

引用次数: 0

[Possibility of functional exploration of mastication from acoustic signals]. 从声学信号探索咀嚼功能的可能性。

Archives internationales de physiologie, de biochimie et de biophysique Pub Date : 1993-11-01 DOI: 10.3109/13813459309046999

M Boiron, M C Lemaire, G Unger, J Thouvenot

{"title":"[Possibility of functional exploration of mastication from acoustic signals].","authors":"M Boiron, M C Lemaire, G Unger, J Thouvenot","doi":"10.3109/13813459309046999","DOIUrl":"https://doi.org/10.3109/13813459309046999","url":null,"abstract":"The chewing abnormalities are frequently evoked during odontological and medical examinations. Unfortunately, few means of investigation are available to appreciate the functional disorders. The aim of this paper was to assess masticatory parameters from observation and audiosignals of mastication with a simple analysis of records. In a first time, sixty five students (mean age = 20) applied the sugar test for the salivary capacity (dissolution time = 2 to 3 minutes). Then the chewing movements were analysed with three types (I, II, III) of salt or sweet cookies. The total duration of activity was 29.8 and 28.2 seconds respectively for the tests I and II, only 18.2 seconds for the test III. The number of cycles were 32.5, 28.1 and 19.2 mastications for respectively I, II and III tests. The later type (III) had a softer consistency than the formers. The duration Dc of masticatory cycles was constant for the same type of aliment. The values were between 0.70 for the test II and 0.90 second for the I and II ones. Signal analysis showed an important and rapid decrease of amplitude AS with an exponential-like pattern. The time constant appeared in relation with the softness. Thus, our method allows to characterize the pattern of mastication and could be used for appreciation of degrees in salivary and/or cranio-mandibular functional abnormalities.","PeriodicalId":77008,"journal":{"name":"Archives internationales de physiologie, de biochimie et de biophysique","volume":"101 6","pages":"399-403"},"PeriodicalIF":0.0,"publicationDate":"1993-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3109/13813459309046999","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18518584","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: 1

Blood coagulation factors changes during liver regeneration in rats. 大鼠肝脏再生过程中凝血因子的变化。

Archives internationales de physiologie, de biochimie et de biophysique Pub Date : 1993-11-01 DOI: 10.3109/13813459309046992

J Antović, V Djordjević, G Kocić, D Koraćević, G Bjelaković, M Bakić

引用次数: 6

Characteristics of thiamin transport in the isolated perfused guinea pig heart. 豚鼠离体灌注心脏中硫胺素转运的特点。

Archives internationales de physiologie, de biochimie et de biophysique Pub Date : 1993-11-01 DOI: 10.3109/13813459309046986

D M Mitrović, M A Rosić, M Mojović, J Nestorović, M Kostić

引用次数: 7

Morphogenetic and growth related changes in lipids of Drosophila ananassae (Doleschall). 果蝇脂质形态发生及生长相关变化。

Archives internationales de physiologie, de biochimie et de biophysique Pub Date : 1993-11-01 DOI: 10.3109/13813459309047003

R Srinivasan, K Ramalingam, P V Raja

引用次数: 0

Comparative effects of bradykinin and atrial natriuretic factor on neuronal and non-neuronal noradrenaline uptake in the central nervous system of the rat. 缓激素和房利钠因子对大鼠中枢神经系统神经元和非神经元去甲肾上腺素摄取的影响。

Archives internationales de physiologie, de biochimie et de biophysique Pub Date : 1993-11-01 DOI: 10.3109/13813459309046989

B E Fernandez, M S Vatta, L G Bianciotti

引用次数: 6

[Cardiovascular function in man during experimental dives at 26 ATA (helium-nitrogen-oxygen mixture)]. [在26 ATA(氦-氮-氧混合物)实验潜水期间人类的心血管功能]。

Archives internationales de physiologie, de biochimie et de biophysique Pub Date : 1993-11-01 DOI: 10.3109/13813459309046990

P Barthelemy, F Joulia, H Burnet, Y Jammes

{"title":"[Cardiovascular function in man during experimental dives at 26 ATA (helium-nitrogen-oxygen mixture)].","authors":"P Barthelemy, F Joulia, H Burnet, Y Jammes","doi":"10.3109/13813459309046990","DOIUrl":"https://doi.org/10.3109/13813459309046990","url":null,"abstract":"During two human experimental dives at 26 ATA (helium-nitrogen-oxygen gaz mixture; PIO2 = 400 mbar), the cardiac frequency (Fc) and radial arterial pulse were continuously recorded, at rest and during periods of maximal expiratory (Valsalva) or inspiratory (Müller) manoeuvres, used to increase or decrease the intrathoracic pressure, respectively. Cardiovascular variables were measured at 1 and 26 ATA in resting individuals and during the maximal respiratory manoeuvres. Discontinuous measurement of arterial blood pressure using a sphygomanometer allowed to calculate the mean arterial pressure. The value of mean arterial pressure was maintained against the membrane of a radial pulse sensor. This procedure, proposed by Posey et al. (1969), gives a continuous approximation and recording of arterial blood pressure and its components. The present results did not show significant variation in the values of Fc nor systolic or diastolic blood pressures measured at rest or during Müller manoeuvres performed at 1ATA at the maximal depth. On the other hand, Valsalva manoeuvres performed at depth induced significant variations in circulatory variables compared to the normobaric response. The most important effect was an enlargement of differential pressure due to a marked decrease in the diastolic blood pressure. These observations are discussed in terms of enlarged sensitivity of the baroreflex arch under hyperbaric condition.","PeriodicalId":77008,"journal":{"name":"Archives internationales de physiologie, de biochimie et de biophysique","volume":"101 6","pages":"341-5"},"PeriodicalIF":0.0,"publicationDate":"1993-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3109/13813459309046990","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18519791","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

Effects of adenosine on chronotropic responses of rat atria to alpha and beta adrenergic stimulation. 腺苷对大鼠心房对肾上腺素能刺激的变时反应的影响。

Archives internationales de physiologie, de biochimie et de biophysique Pub Date : 1993-11-01 DOI: 10.3109/13813459309046987

O A Gende

引用次数: 0