Archives internationales de physiologie et de biochimie最新文献

筛选
英文 中文
Iron status in runners of various running specialties. 不同跑步专业运动员体内的铁含量。
Archives internationales de physiologie et de biochimie Pub Date : 1990-03-01 DOI: 10.3109/13813459009115743
G Mouton, F E Sluse, A Bertrand, A Welter, J L Cabay, G Camus
{"title":"Iron status in runners of various running specialties.","authors":"G Mouton,&nbsp;F E Sluse,&nbsp;A Bertrand,&nbsp;A Welter,&nbsp;J L Cabay,&nbsp;G Camus","doi":"10.3109/13813459009115743","DOIUrl":"https://doi.org/10.3109/13813459009115743","url":null,"abstract":"<p><p>The blood iron status of 44 male runners of various running specialties (18 sprinters, 13 middle- and 13 long-distance runners) is evaluated by measuring serum ferritin (SF), serum iron (Si), hemoglobin concentration (Hb), hematocrit (Ht), red blood cells content (RBC) and haptoglobin concentration (Hp). The results of these analyses (except Hp) are compared to those obtained in sedentary male subjects (control group) of the same mean age. Mean SF, SI, Hb and Ht measured in athletes are significantly lower than in control group. The remarkably low Hp values obtained in athletes suggests the occurrence of hemolysis. Using unpaired t test, it appears that the blood iron status of these runners does not depend on their running specialty.</p>","PeriodicalId":8170,"journal":{"name":"Archives internationales de physiologie et de biochimie","volume":"98 1","pages":"103-9"},"PeriodicalIF":0.0,"publicationDate":"1990-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3109/13813459009115743","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12857114","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: 10
Temperature sensitivity of the human cardiac pacemaker during exercise. 人体心脏起搏器在运动过程中的温度敏感性。
Archives internationales de physiologie et de biochimie Pub Date : 1989-12-01 DOI: 10.3109/13813458909075080
C P Bolter, V K Kebas
{"title":"Temperature sensitivity of the human cardiac pacemaker during exercise.","authors":"C P Bolter,&nbsp;V K Kebas","doi":"10.3109/13813458909075080","DOIUrl":"https://doi.org/10.3109/13813458909075080","url":null,"abstract":"<p><p>The temperature sensitivity of the human cardiac pacemaker was investigated during exhaustive exercise. From graded runs to exhaustion, we established the relationship between maximum exercise heart rate (HRmax) and rectal temperature (Tr). After warm-up periods of varying intensity and duration, four male subjects completed 4 to 6 runs each, each run performed on a separate day. For every subject there was a strong linear correlation between HRmax and Tr (r = 0.79 to 0.96). Various measures of the temperature sensitivity were: linear sensitivity, 8.8 +/- 4.3 beats min-1.degrees C-1; Q10, 1.6 +/- 0.4 and the Arrhenius constant, mu, 35.9 +/- 16.6 kJ.mol-1. At HRmax the value for linear temperature sensitivity was similar to, but the values for Q10 and mu lower than, those observed previously for intrinsic heart rate. Sympathetic influence on the cardiac pacemaker during exercise may cause this reduction, by shifting the pacemaker location to cells with a lower temperature sensitivity, or by altering a rate-limiting step determining the diastolic pacemaker potential.</p>","PeriodicalId":8170,"journal":{"name":"Archives internationales de physiologie et de biochimie","volume":"97 6","pages":"493-7"},"PeriodicalIF":0.0,"publicationDate":"1989-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3109/13813458909075080","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13628765","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: 2
Effects of a restricted diet on the submaxillary gland of intact and castrated male rats. 限制饮食对完整和去势雄性大鼠颌下腺的影响。
Archives internationales de physiologie et de biochimie Pub Date : 1989-12-01 DOI: 10.3109/13813458909075084
A Goldraij, M L Rins de David, P Fernandez Delgado
{"title":"Effects of a restricted diet on the submaxillary gland of intact and castrated male rats.","authors":"A Goldraij,&nbsp;M L Rins de David,&nbsp;P Fernandez Delgado","doi":"10.3109/13813458909075084","DOIUrl":"https://doi.org/10.3109/13813458909075084","url":null,"abstract":"<p><p>Effects of diet restriction (50% of normal) during 4 weeks were studied in intact (controls) and castrated rats. A restricted diet led to cessation of animal growth. No differences were observed between controls and castrated rats. However, underfeeding produced a reduction of testicular weight in intact rats. Histochemical observations showed a reduction of tryptophan (a marker of the presence of testosterone-dependent protein) in the submaxillary gland from animals fed a restricted-diet. In animals fed a normal diet, castration reduced significantly the gland weight, as well as the diameter of tubules and acini. When animals fed a restricted-diet are compared, no significant differences were found in the diameter of tubules and acini or in the weight of submaxillary glands.</p>","PeriodicalId":8170,"journal":{"name":"Archives internationales de physiologie et de biochimie","volume":"97 6","pages":"531-5"},"PeriodicalIF":0.0,"publicationDate":"1989-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3109/13813458909075084","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13628037","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
Correlation between the sexually dimorphic aromatase of the preoptic area and sexual behavior in quail: effects of neonatal manipulations of the hormonal milieu. 鹌鹑视前区两性二态芳香化酶与性行为的相关性:新生儿激素环境的影响。
Archives internationales de physiologie et de biochimie Pub Date : 1989-12-01 DOI: 10.3109/13813458909075078
J Balthazart
{"title":"Correlation between the sexually dimorphic aromatase of the preoptic area and sexual behavior in quail: effects of neonatal manipulations of the hormonal milieu.","authors":"J Balthazart","doi":"10.3109/13813458909075078","DOIUrl":"https://doi.org/10.3109/13813458909075078","url":null,"abstract":"<p><p>The aromatase of the preoptic area is significantly more active in males than in females. This sex dimorphism in enzyme activity is still found in birds that have been gonadectomized and treated with a same dose of testosterone. This suggests that the sex difference is not the result of a differential activation by the adult hormonal environment but rather is organized neonatally by steroid hormones. As the central aromatization of testosterone is a limiting step in the activation of copulatory behavior by testosterone, the lower aromatase activity in the preoptic area of females might be responsible, at least in part, for their lower sensitivity to the activating effects of testosterone on behavior. Three experiments were carried out to determine whether early manipulations of the hormonal environment, which are known to differentiate sexual behavior, also affect in a permanent way the aromatase activity in the preoptic area. Injection of estradiol benzoate into male embryos on day 9 of incubation decreased the preoptic aromatase activity in parallel to its demasculinizing effect on behavior. Unexpectedly the same treatment tended to increase enzyme activity in females so that the physiological relevance of the observed enzymatic change remains questionable. In two independent experiments, we confirmed that neonatal ovariectomy of female quail interferes with their behavioral differentiation. Females gonadectomized at 4 days post-hatch showed significantly more male-type sexual behavior as adult in response to testosterone than females gonadectomized at the age of 5 weeks. These experiments also confirmed that the preoptic aromatase activity is higher in males than in females but no evidence for an effect of the age of gonadectomy on the enzyme activity could be obtained. The sex difference and experimental modifications observed in the aromatase activity of the preoptic area were not seen in the posterior hypothalamus demonstrating that these effects are specific. The mechanisms controlling the sex difference in aromatase activity are discussed. The difference might be organized by the action of embryonic steroids as suggested by the changes observed in males injected with estradiol benzoate in egg. Alternatively, activational mechanisms cannot be ruled out at present. In one experiment, the activity of the preoptic aromatase was positively correlated with the sexual activity of the birds.(ABSTRACT TRUNCATED AT 400 WORDS)</p>","PeriodicalId":8170,"journal":{"name":"Archives internationales de physiologie et de biochimie","volume":"97 6","pages":"465-81"},"PeriodicalIF":0.0,"publicationDate":"1989-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3109/13813458909075078","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13628763","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: 28
Effects of an imidazole derivative (KK-42) on development and ecdysteroid production in Locusta migratoria (Insecta, Orthoptera). 咪唑衍生物KK-42对飞蝗发育和表皮甾体分泌的影响。
Archives internationales de physiologie et de biochimie Pub Date : 1989-12-01 DOI: 10.3109/13813458909075082
J P Roussel, K Mojtahed-Zadeh, R Lanot, E Kuwano, H Akai
{"title":"Effects of an imidazole derivative (KK-42) on development and ecdysteroid production in Locusta migratoria (Insecta, Orthoptera).","authors":"J P Roussel,&nbsp;K Mojtahed-Zadeh,&nbsp;R Lanot,&nbsp;E Kuwano,&nbsp;H Akai","doi":"10.3109/13813458909075082","DOIUrl":"https://doi.org/10.3109/13813458909075082","url":null,"abstract":"<p><p>The imidazole derivative KK-42 was applied in various experimental conditions to larvae and adult females of Locusta migratoria. The effect of this compound was monitored on the development of larvae, on oocyte growth in adult females and on the development of eggs laid by these females. KK-42 had only minor effects on postembryonic development; anticipation of imaginal moult was never observed. In contrast oocyte and egg development were markedly affected by KK-42: this effect is however not related to modifications of the synthesis of ecdysteroids in the ovaries.</p>","PeriodicalId":8170,"journal":{"name":"Archives internationales de physiologie et de biochimie","volume":"97 6","pages":"511-20"},"PeriodicalIF":0.0,"publicationDate":"1989-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3109/13813458909075082","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13628035","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: 7
Société Belge de Biochimie. 141st meeting. Liège, 26-27 May 1989. Abstracts. 比利时生物化学学会。第141次会议。列日,1989年5月26日至27日。摘要。
{"title":"Société Belge de Biochimie. 141st meeting. Liège, 26-27 May 1989. Abstracts.","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":8170,"journal":{"name":"Archives internationales de physiologie et de biochimie","volume":"97 6","pages":"B121-95"},"PeriodicalIF":0.0,"publicationDate":"1989-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13628903","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 direct effect of the thyroid hormone on cardiac chronotropism. 甲状腺激素对心脏变时性的直接影响。
Archives internationales de physiologie et de biochimie Pub Date : 1989-12-01 DOI: 10.3109/13813458909075074
M Valente, C De Santo, P de Martino Rosaroll, V Di Maio, S Di Meo, T De Leo
{"title":"The direct effect of the thyroid hormone on cardiac chronotropism.","authors":"M Valente,&nbsp;C De Santo,&nbsp;P de Martino Rosaroll,&nbsp;V Di Maio,&nbsp;S Di Meo,&nbsp;T De Leo","doi":"10.3109/13813458909075074","DOIUrl":"https://doi.org/10.3109/13813458909075074","url":null,"abstract":"<p><p>To establish whether thyroid hormone modifies the heart rate directly or through an action on other neuroendocrine modulators, the authors have examined several animals models differing in the plasma levels of such compounds. Induction of the hypothyroid state in rats produced a slow onset of bradycardia, which may be removed by a prolonged triiodothyronine treatment. The involvement of TSH was excluded as, by comparing thyroidectomized, hypophysectomized and cold exposed rats, the heart rate was found to vary according to the thyroid levels and not to the TSH levels. Moreover growth hormone, corticotropin and gonadotropins do not influence the heart rate, as the bradycardia induced by hypophysectomy was fully removed by triiodothyronine treatment. The lack of influence by ACTH and GnH was confirmed by treatment of thyroidectomized rats with corticosteroids or testosterone, respectively. Finally, thyroid hormone did not act on the heart rate by changing the norepinephrine output at the sympathetic nerve endings in the heart. In fact, thyroidectomy produced a more intense bradycardia than sympathectomy, and such bradycardia was equally removed by triiodothyronine treatment in thyroidectomized rats and in thyroidectomized and then sympathectomized ones. The authors suggest that the direct effect of the thyroid hormone on cardiac chronotropism is due to an early enhancement of beta-adrenoceptors, followed by a late modification of the electrophysiological properties of the myocardium.</p>","PeriodicalId":8170,"journal":{"name":"Archives internationales de physiologie et de biochimie","volume":"97 6","pages":"431-40"},"PeriodicalIF":0.0,"publicationDate":"1989-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3109/13813458909075074","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13628759","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: 22
Vagal afferents and EEG rhythms in the Sl area in anesthetized cats: similarities between responses to electrical and chemical (phenyldiguanide) stimulations. 麻醉猫迷走神经传入和Sl区脑电图节律:电刺激和化学(苯二胍)刺激反应的相似性。
Archives internationales de physiologie et de biochimie Pub Date : 1989-12-01 DOI: 10.3109/13813458909075079
E Balzamo, Y Jammes
{"title":"Vagal afferents and EEG rhythms in the Sl area in anesthetized cats: similarities between responses to electrical and chemical (phenyldiguanide) stimulations.","authors":"E Balzamo,&nbsp;Y Jammes","doi":"10.3109/13813458909075079","DOIUrl":"https://doi.org/10.3109/13813458909075079","url":null,"abstract":"<p><p>In anesthetized, artificially ventilated cats with open chest, bilateral stimulation of all afferent vagal fibres (pulse duration: 800 microseconds, 30 Hz, train duration 30 to 40 s) produced marked changes in the spontaneous EEG activities in the primary somatosensory cortex (Sl area). They were characterized by depressed background rhythms, with a tendency to desynchronization, decreased amplitude and number of spindles, with altered pattern, and/or evoked sustained fast rhythmic activities. These effects occurred within 1 to 5 sec during vagal stimulation. On the contrary, the EEG response was weaker or absent when only myelinated vagal afferents were stimulated (100 microseconds). I.v. injection of phenyldiguanide (PDG), used for stimulation of unmyelinated vagal sensory fibres and mainly of pulmonary afferents, induced EEG changes within the first 30 s, similar to those observed during electrical vagal stimulation. These EEG responses were unrelated to the induced hypotension. Cervical bivagotomy produced persistent changes in EEG activity, with enhancement of the magnitude, duration and number of spindles, which resembled the delayed effects induced by PDG. The present results obtained with three test agents (electrical or chemical vagal stimulation and bivagotomy) demonstrated that, in cats, vagal afferent information interacted with the spontaneous EEG rhythms in the Sl area.</p>","PeriodicalId":8170,"journal":{"name":"Archives internationales de physiologie et de biochimie","volume":"97 6","pages":"483-92"},"PeriodicalIF":0.0,"publicationDate":"1989-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3109/13813458909075079","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13628764","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: 13
Series elasticity in frog sartorius muscle during release and stretch. 蛙缝匠肌放松和拉伸时的系列弹性。
Archives internationales de physiologie et de biochimie Pub Date : 1989-12-01 DOI: 10.3109/13813458909075081
G Lensel-Corbeil, F Goubel
{"title":"Series elasticity in frog sartorius muscle during release and stretch.","authors":"G Lensel-Corbeil,&nbsp;F Goubel","doi":"10.3109/13813458909075081","DOIUrl":"https://doi.org/10.3109/13813458909075081","url":null,"abstract":"<p><p>When a stretch is applied to an isolated muscle during tetanic stimulation, the force developed is higher than the maximal isometric tension (Po). This force puts the series elastic component (SEC) under tension and in a domain which is not well defined in terms of tension-extension curve. In the present work, an attempt was made to determine the stiffness of the SEC for tensions greater than Po, using the sartorius muscle of the frog. For this purpose, rapid releases and stretches of different amplitudes were given during maximal isometric contractions. Plotting normalized tension (P/Po) against normalized length changes (negative or positive extensions, delta L/Lo.10(2] produced a tension-extension curve. The slopes of the linear part of each relationship on both sides of Po indicated an increase in SEC stiffness when the muscle was rapidly stretched. Furthermore, the transient character of the increase in stiffness was studied by measuring SEC stiffness during rapid releases applied at various time intervals after stretches: the muscle was found to be stiffer as the time interval was shorter. The results are discussed in terms of (i) non-linear behaviour of the passive and active parts of the SEC, (ii) enhancement of storage and release of potential energy.</p>","PeriodicalId":8170,"journal":{"name":"Archives internationales de physiologie et de biochimie","volume":"97 6","pages":"499-509"},"PeriodicalIF":0.0,"publicationDate":"1989-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3109/13813458909075081","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13628034","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: 18
Modulation of the heart rate by thyroid hormone in the newborn rat. 甲状腺激素对新生大鼠心率的调节作用。
Archives internationales de physiologie et de biochimie Pub Date : 1989-12-01 DOI: 10.3109/13813458909075073
M Valente, P de Martino Rosaroll, C De Santo, S Di Meo, T De Leo
{"title":"Modulation of the heart rate by thyroid hormone in the newborn rat.","authors":"M Valente,&nbsp;P de Martino Rosaroll,&nbsp;C De Santo,&nbsp;S Di Meo,&nbsp;T De Leo","doi":"10.3109/13813458909075073","DOIUrl":"https://doi.org/10.3109/13813458909075073","url":null,"abstract":"<p><p>Confirming the literature data the authors describe that the heart rate is smaller in the newborn rats than in adult ones and increases until the adult values during the first two weeks of life. On the other hand, the blood thyroid hormone exhibits the same pattern, showing an early postnatal increment. As, according the Adolph's data (1967), the heart rate enhancement is not due to the catecholamines, the authors suppose that such enhancement might conceivably depend on thyroid hormone increment.</p>","PeriodicalId":8170,"journal":{"name":"Archives internationales de physiologie et de biochimie","volume":"97 6","pages":"427-30"},"PeriodicalIF":0.0,"publicationDate":"1989-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3109/13813458909075073","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13628758","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
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信