Revista espanola de fisiologia最新文献_第7页

Lipolytic effects of beta1, beta2 and beta3-adrenergic agonists in isolated human fat cells from omental and retroperitoneal adipose tissues. β 1， β 2和β 3肾上腺素能激动剂对大网膜和腹膜后脂肪组织分离的人脂肪细胞的溶脂作用。

Revista espanola de fisiologia Pub Date : 1995-12-01

M P Portillo, A M Rocandio, M A Garcia-Calonge, E Diaz, E Campo, C Martinez-Blazquez, J Errasti, A S del Barrio

引用次数: 0

Hematological recovery in Sparus aurata after bleeding. A time course study. 金斑柏出血后血液学恢复。时间课程学习。

Revista espanola de fisiologia Pub Date : 1995-12-01

D Montero, L L Tort, M S Izquierdo, J Socorro, J M Vergara, L Robaina, H Fernandez-Palacios

引用次数: 0

Changes in skeletal metabolism after the administration of demineralized bone proteins and fluoride. 脱矿化骨蛋白和氟化物处理后骨骼代谢的变化。

Revista espanola de fisiologia Pub Date : 1995-09-01

M Elorriaga, F Lecanda, J A Martínez, J Larralde

引用次数: 0

Liver DNA and RNA metabolism in rats fed diets lacking methionine plus cysteine with or without restricted energy. 饲粮缺乏蛋氨酸加半胱氨酸时肝脏DNA和RNA代谢的变化。

Revista espanola de fisiologia Pub Date : 1995-09-01

J L Rey de Viñas, M González-Fernández, M C Sandoval

{"title":"Liver DNA and RNA metabolism in rats fed diets lacking methionine plus cysteine with or without restricted energy.","authors":"J L Rey de Viñas, M González-Fernández, M C Sandoval","doi":"","DOIUrl":"","url":null,"abstract":"Ponderal parameters, soluble protein content and nucleic acid (DNA and RNA) metabolism were studied in liver of growing male Wistar rats fed with different diets: control diet (Control group) containing 10% protein (casein 9.8% plus DL-methionine 0.2%); diet 2 (Group 2) containing 10% protein, lacking Met plus Cys; and diet 3 (Group 3), containing 20% protein, lacking Met plus Cys and with 50% of energy restriction (restricted food intake by experimental design). Diets 2 and 3 were compared with the control diet to know the effects produced by the lack of Met plus Cys and the energy restriction, for an experimental period of 14 days, the animals being slaughtered on the 4th, 8th and 14th days. Food intake, body and liver weights, relative liver weight, cellular size and RNA content per organ and per mg protein decreased in groups 2 and 3, group 3 being affected more than group 2. Diet 2 produced a decrease in DNA content, due to lack of Met+Cys. Acid DNAse activity per organ diminished in group 2 on days 8 and 14, and in group 3 on the 8th day. RNA/DNA ratio diminished in group 2 and 3 due to a proportional RNA reduction with respect to the DNA content. Acid RNAse activity per organ diminished in group 2 on the 8th and 14th days, RNAse per mg of protein increased in group 3 at the end of the treatment, therefore the RNA content decreased. The content of DNA in liver is lower than RNA content in rats fed diet 2 and the opposite occurs with diet 3.","PeriodicalId":21473,"journal":{"name":"Revista espanola de fisiologia","volume":"51 3","pages":"129-38"},"PeriodicalIF":0.0,"publicationDate":"1995-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19586288","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

Effect of blood pH on pulmonary artery pressure, left atrial pressure and fluid filtration rate in isolated rabbit lung. 血pH值对离体兔肺动脉压、左房压及肺液滤过率的影响。

Revista espanola de fisiologia Pub Date : 1995-09-01

V M Pinto-Plata, J C Pozo-Parilli, A Baum-Agay, C Curiel, R Sánchez de León

{"title":"Effect of blood pH on pulmonary artery pressure, left atrial pressure and fluid filtration rate in isolated rabbit lung.","authors":"V M Pinto-Plata, J C Pozo-Parilli, A Baum-Agay, C Curiel, R Sánchez de León","doi":"","DOIUrl":"","url":null,"abstract":"To determine the effects of pH changes on Pulmonary Artery Pressure (PAP), 18 isolated rabbit lung preparations, perfused with autologous blood mixture and constant PaCO2 have been studied. Each preparation was studied under 3 conditions: Baseline: 30 minutes equilibration period. Acidosis: pH was decreased by 0.2 N HCl infusion, the ventilatory rate was changed and different CO2 mixtures were used to maintain the PCO2 within the initial parameters. Compensated Acidosis (CA): pH was returned to normal values by 0.7 N NaHCO3 infusion maintaining PCO2 in its initial values. The decrease in pH (acidosis) from 7.36 +/- 0.05 to 7.18 +/- 0.06 at constant PCO2, generated a significant increase in PAP (13.6 +/- 3.2 cm H2O to 18.8 +/- 5.2 cm H2O, p < 0.01). The pH increase (CA) from 7.18 +/- 0.06 to 7.40 +/- 0.09 caused the PAP to decrease (18.8 +/- 5.2 cm H2O to 15.9 +/- 4.2 cm H2O); the fluid filtration rate remained unchanged during the whole experiment. It is concluded that blood pH changes at constant PCO2 result in significant changes of PAP. Acidemia produces pulmonary vasoconstriction, which may be a contributing factor in the genesis of pulmonary hypertension in clinical conditions with increased hydrogen ion concentration [H+].","PeriodicalId":21473,"journal":{"name":"Revista espanola de fisiologia","volume":"51 3","pages":"117-23"},"PeriodicalIF":0.0,"publicationDate":"1995-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19586286","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

Effect of zinc on D-galactose and L-phenylalanine uptake in rat intestine in vitro. 锌对大鼠肠道d -半乳糖和l -苯丙氨酸摄取的影响。

Revista espanola de fisiologia Pub Date : 1995-09-01

A Lugea, A Barber, F Ponz

{"title":"Effect of zinc on D-galactose and L-phenylalanine uptake in rat intestine in vitro.","authors":"A Lugea, A Barber, F Ponz","doi":"","DOIUrl":"","url":null,"abstract":"The effect of zinc on galactose and phenylalanine uptake was studied using rat everted jejunal rings. The rings were incubated for 2 min in oxygenated Krebs-Ringer-Tris (KRT) solution. Galactose and phenylalanine uptake was reduced by zinc in a dose-dependent manner, but not in a time-dependent way. One mM Zn2+ but not 0.5 mM Zn2+ inhibited galactose transport without modifying sugar diffusion. Na(+)-dependent phenylalanine transport was reduced by 0.5 mM and 1 mM Zn2+. However, the metal did not change phenylalanine diffusion obtained in the presence of 40 mM L-methionine or Na(2+)-independent phenylalanine transport. Therefore, zinc seems to interact only with the sodium-galactose or sodium-phenylalanine cotransporters. Zinc inhibited sugar and amino acid transport in a non-competitive way, without a significant change in the affinity of the transporters for their substrates and with a Vmax decrease. The inhibitory effect of Zn2+ on galactose and phenylalanine uptake was reversed by washing intestinal rings for 5 min with KRT solution. These results suggest that zinc might exert its inhibitory action by a weak binding to chemical groups related with sodium-substrate cotransporters and located in the luminal membrane of the enterocytes.","PeriodicalId":21473,"journal":{"name":"Revista espanola de fisiologia","volume":"51 3","pages":"139-46"},"PeriodicalIF":0.0,"publicationDate":"1995-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19586289","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

Analysis of the interactions between growth hormone and metaproterenol on lipid mobilization. 生长激素与甲肾上腺素对脂质动员的相互作用分析。

Revista espanola de fisiologia Pub Date : 1995-09-01

M P Portillo, A S del Barrio, J A Martínez

引用次数: 0

Sublethal effect of mercury and lead on monoamine oxidase in different regions of the brain in three freshwater teleosts. 汞和铅对三种淡水硬骨鱼大脑不同区域单胺氧化酶的亚致死效应。

Revista espanola de fisiologia Pub Date : 1995-09-01

S A Shaffi

引用次数: 0

Electrolyte and water contents in organs and tissues of rats during and after exposure to prolonged restriction of motor activity. 长期限制运动活动期间和之后大鼠器官和组织中的电解质和水分含量。

Revista espanola de fisiologia Pub Date : 1995-09-01

Y G Zorbas, A L Ivanov, Y F Federenko

{"title":"Electrolyte and water contents in organs and tissues of rats during and after exposure to prolonged restriction of motor activity.","authors":"Y G Zorbas, A L Ivanov, Y F Federenko","doi":"","DOIUrl":"","url":null,"abstract":"Sodium and potassium concentrations in organs and tissues of rats have been determined during hypokinesia (HK) and posthypokinesia (post-HK) periods. The study was performed on 180 male Wistar rats with an initial body weight of 370 to 390 g. They were divided into control and experimental groups: the 1st group of rats was placed under ordinary vivarium conditions (control) and the 2nd group was subjected to 90 days of HK (hypokinetic animals). The animals were kept in small individual wooden cages which restricted their movements in all directions without hindering feed and water intake. On the 30th, 60th and 90th day of the HK period and on the 5th, 10th and 15th day of the post-HK period animals were decapitated, and potassium and sodium concentrations were measured in the myocardium, skeletal muscles, erythrocytes and plasma. Fluid content was also determined in the myocardium and skeletal muscles. During both the HK period and initial stages of the post-HK period the concentration of sodium and potassium in the myocardium, skeletal muscle, plasma and erythrocytes as well as water content in the myocardium and skeletal muscle changed significantly.","PeriodicalId":21473,"journal":{"name":"Revista espanola de fisiologia","volume":"51 3","pages":"155-62"},"PeriodicalIF":0.0,"publicationDate":"1995-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19586291","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

One day estrous cycle shortening induced by antiprogestagen RU486 administration in proestrus to 4-day cyclic rats. 抗孕激素RU486对4天周期大鼠发情前期缩短1天发情周期的影响。

Revista espanola de fisiologia Pub Date : 1995-06-01

M Tébar, A Ruiz, J E Sánchez-Criado

引用次数: 0