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Revue canadienne de biologie最新文献

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Ultrastructural correlates of luminescence in Porichthys photophores. I. Effects of spinal cord stimulation and exogenous noradrenaline. 波鱼荧光体发光的超微结构相关。脊髓刺激和外源性去甲肾上腺素的作用。
Revue canadienne de biologie Pub Date : 1979-06-01
M Anctil
{"title":"Ultrastructural correlates of luminescence in Porichthys photophores. I. Effects of spinal cord stimulation and exogenous noradrenaline.","authors":"M Anctil","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Light emission induced by electrical stimulation of the spinal cord is associated with ultrastructural alterations of the varicose endings, photocyte organelles and membranes in Porichthys photophores. Changes in nerve profiles appear first and include alterations of the shape, number and distribution of synaptic vesicles, as well as invaginations of the axolemma and mitochondrial swellings. Protocyte vesicles become markedly coalesced and their membranes are incorporated inside vesicular pools, whereas photocyte microvilli become sharply reduced at the cell periphery. Luminescence obtained by administration of noradrenaline is accompanied by similar, but more acute changes in the ultrastructure of photocytes, whereas no marked alteration of nerve profiles is noted after this treatment. These and other observations, such as the presence of specialized synaptic contacts, are discussed in terms of neural activity and processes within the photocytes which may lead to light production.</p>","PeriodicalId":21345,"journal":{"name":"Revue canadienne de biologie","volume":"38 2","pages":"67-80"},"PeriodicalIF":0.0,"publicationDate":"1979-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"11698422","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
Nucleic acid separation by isopycnic centrifugation. 核酸分离等重离心法。
Revue canadienne de biologie Pub Date : 1979-06-01
E D Lalague, G H Cousineau
{"title":"Nucleic acid separation by isopycnic centrifugation.","authors":"E D Lalague,&nbsp;G H Cousineau","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":21345,"journal":{"name":"Revue canadienne de biologie","volume":"38 2","pages":"119-23"},"PeriodicalIF":0.0,"publicationDate":"1979-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"11595052","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
[Immediate effects of thermal shocks on the plasma level of various components in the Rainbow trout: compounds indicating stress and protein fraction]. [热冲击对虹鳟鱼血浆中各种成分水平的直接影响:表明应激和蛋白质含量的化合物]。
Revue canadienne de biologie Pub Date : 1979-03-01
H Perrier, C Perrier, G Pérès, J Gras
{"title":"[Immediate effects of thermal shocks on the plasma level of various components in the Rainbow trout: compounds indicating stress and protein fraction].","authors":"H Perrier,&nbsp;C Perrier,&nbsp;G Pérès,&nbsp;J Gras","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Rainbow trout were subjected to thermal shocks (9 degrees water temperature increase, 1 hr stay at 21 degrees and return to initial temperature) at the rate of 2 shocks a day during 1 day or 3 successive days. The observed changes only show a moderate reaction. cAMP does not vary; lactate slightly increases at 17 hr after the end of the shocks. Glucose seems to be the most reliable stress indicator; it increases at 2 hr and remains again above control value at 17 hr after a 3 day shock time. Fibrinogen increases after a 3 day shock time. Lastly, a strong decrease in low density lipoprotein level is seen at 17 hr following both shock duration times and from 2 hr in case of a 3 day shock time.</p>","PeriodicalId":21345,"journal":{"name":"Revue canadienne de biologie","volume":"38 1","pages":"37-41"},"PeriodicalIF":0.0,"publicationDate":"1979-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"11435032","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
[Relationship between anatomical structure and metabolism of plant tissues. I. Differences between the qualitative and quantitative composition of phenolic substances of apple explants and that of callus and cells produced by the culture]. 植物组织的解剖结构与代谢的关系。1 .苹果外植体与愈伤组织及培养细胞中酚类物质的定性和定量组成的差异[j]。
Revue canadienne de biologie Pub Date : 1979-03-01
C T Phan, J J Macheix
{"title":"[Relationship between anatomical structure and metabolism of plant tissues. I. Differences between the qualitative and quantitative composition of phenolic substances of apple explants and that of callus and cells produced by the culture].","authors":"C T Phan,&nbsp;J J Macheix","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Relationship between anatomical structure and metabolism of plant tissues. I. Differences between the qualitative and quantitative composition of phenolic substances of apple-fruit explants and that of calli and cells cultured from these explants. Phenolic compounds of intact apple-fruits (CV. Golden delicious), fruit fragments cultured on agar medium, newly formed calli and cell suspensions prepared from these calli, were studied quantitatively and qualitatively. The phenol content of the tissues decreased during the first days of culture, then recovered practically the initial level just before the initiating calli became visible. This content is very low in the calli and in the cultured cells. But the most remarkable result is that the qualitative compositions of the phenols extracted from the fruit tissues, the calli and the cells were different : p-coumaryglucose, which is abundant in the fruit, disappeared almost completely in the calli, in which three compounds were formed de novo, X1 which was tentatively identified as ferulylquinic acid, X2, a glycoside of p-coumaric acid different from p-coumarylglucose, and X3 not yet identified; the cells synthesized also X1 and X3 but not X2, and contained no p-coumaryglucose while feruylquinic acid was abundant. The study on the processes of induction or regulation of the enzymes implied in these metabolic modifications is under way.</p>","PeriodicalId":21345,"journal":{"name":"Revue canadienne de biologie","volume":"38 1","pages":"17-25"},"PeriodicalIF":0.0,"publicationDate":"1979-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"11646164","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 effect of luminance upon the distribution and behavior of the Eleotrid fish Gobiomorus dormitor, and its prey. 光照对电鳗鱼寝室及其猎物分布和行为的影响。
Revue canadienne de biologie Pub Date : 1979-03-01
K R McKaye, D J Weiland, T M Lim
{"title":"The effect of luminance upon the distribution and behavior of the Eleotrid fish Gobiomorus dormitor, and its prey.","authors":"K R McKaye,&nbsp;D J Weiland,&nbsp;T M Lim","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Gobiomorus dormitor success in capturing prey, cichlids, poeciliids and atherinids, is correlated with low luminance. Both prey and predator populations inhabiting rocky areas in Lake Jiloa, Nicaragua shift to deeper water during the dry season when luminance is greater. Predator and prey populations are also deeper over bright sandy areas than over rocks. Predators, during the middle of the day, attack prey significantly less in water above 3 m than in water between 3-12 m, but there is a significant increase in the number of attacks occurring above 3 m at twilight. The predator becomes more active, and the prey disappear into holes at twilight. These data suggest that conclusions concerning the importance of light in structuring the community and behavior of marine fishes can be generalized to tropical freshwater systems.</p>","PeriodicalId":21345,"journal":{"name":"Revue canadienne de biologie","volume":"38 1","pages":"27-36"},"PeriodicalIF":0.0,"publicationDate":"1979-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"11647367","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
Role of the hypophysis in thyroid regeneration after partial thyroidectomy. 垂体在甲状腺部分切除术后甲状腺再生中的作用。
Revue canadienne de biologie Pub Date : 1979-03-01
H Isler
{"title":"Role of the hypophysis in thyroid regeneration after partial thyroidectomy.","authors":"H Isler","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The role of the hypophysis in thyroid regeneration was investigated by measuring the mitotic activity of the thyroid remnant in hemithyroidectomized rats as well as the blood levels of thyroid hormone at various time-intervals after hemithyroidectomy. Mitotic activity underwent a significant increase to reach a peak (a 5- to 8- fold increase) 2 days after hemithyroidectomy. The thyroid hormone level in blood was lower than in controls. Histologically, the thyroid gland showed signs of an elevated rate of functional activity, as indicated by losses of colloid and cell hypertrophy. In a second approach, the mitotic activity of the thyroid remnant was estimated in hypophysectomized and in thyroxine treated rats. Both hypophysectomy and thyroxine injection prevented occurrence of the mitotic peak at 2 days. The regeneration of the thyroid after hemithyroidectomy, as it occurred in the present work, may be explained by a release of thyroid stimulating hormone from the pituitary, brought about by the low level of circulating thyroid hormone, itself resulting from a loss of thyroid tissue.</p>","PeriodicalId":21345,"journal":{"name":"Revue canadienne de biologie","volume":"38 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"1979-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"11646163","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
Diel locomotor activity pattern of juvenile Limulus polyphemus Linnaeus. 幼鱼多菲摩斯的昼夜运动活动模式。
Revue canadienne de biologie Pub Date : 1979-03-01
M E Casterlin, W W Reynolds
{"title":"Diel locomotor activity pattern of juvenile Limulus polyphemus Linnaeus.","authors":"M E Casterlin,&nbsp;W W Reynolds","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Ten juvenile Limulus polyphemus, tested individually for 3-day periods in electronic shuttleboxes, exhibited a nocturnal activity pattern; activity was four times as great at Night as during the Day.</p>","PeriodicalId":21345,"journal":{"name":"Revue canadienne de biologie","volume":"38 1","pages":"43-4"},"PeriodicalIF":0.0,"publicationDate":"1979-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"11647368","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
Behavioral thermoregulation in the grass shrimp Palaemonetes vulgaris (Say). 草虾(Palaemonetes vulgaris)的行为体温调节。
Revue canadienne de biologie Pub Date : 1979-03-01
M E Casterlin, W W Reynolds
{"title":"Behavioral thermoregulation in the grass shrimp Palaemonetes vulgaris (Say).","authors":"M E Casterlin,&nbsp;W W Reynolds","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Grass shrimp (Palaemonetes vulgaris) tested in a horizontal linear gradient trough exhibited a modal final thermal preferendum of 27 degrees C, and voluntarily occupied a 24-31 degrees C range.</p>","PeriodicalId":21345,"journal":{"name":"Revue canadienne de biologie","volume":"38 1","pages":"45-6"},"PeriodicalIF":0.0,"publicationDate":"1979-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"11647369","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
[Ultrastructure of the mid-intestine muscle of the larva of Calliphora erythrocephala Meig]. [红头虾仔鱼肠中肌的超微结构]。
Revue canadienne de biologie Pub Date : 1979-03-01
R S Saleh
{"title":"[Ultrastructure of the mid-intestine muscle of the larva of Calliphora erythrocephala Meig].","authors":"R S Saleh","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The fine structure of the mid-gut muscle in larval Calliphora Erythrocephala Meig. Electron microscopy reveals and mid-gut muscle fibres to be composed of an array of actin and myosin myofilaments. The perforated Z-band divides the fibril to sarcomeres. The average length of the sarcomere in 5,34 micrometer for the non contracted muscle and 2,09 micrometer for the fully contracted muscle. The thick filaments of the fully contracted muscle pass through the spaces of the Z-structures.</p>","PeriodicalId":21345,"journal":{"name":"Revue canadienne de biologie","volume":"38 1","pages":"9-16"},"PeriodicalIF":0.0,"publicationDate":"1979-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"11647370","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
[Degeneration of the brush border in the midgut of Calliphora erythrocephala Meig]. [胭脂鱼中肠刷缘的退化]。
Revue canadienne de biologie Pub Date : 1978-12-01
R S Saleh
{"title":"[Degeneration of the brush border in the midgut of Calliphora erythrocephala Meig].","authors":"R S Saleh","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The brush border of the intestinal epithelium is described in an actively feeding larvae of Calliphora erythrocephala Meig. It will persist intact after the appearance of the first signs of degeneration of the larval intestinal cells. It will then be invaginated inside the cell forming a \"microvillar dense body.\"</p>","PeriodicalId":21345,"journal":{"name":"Revue canadienne de biologie","volume":"37 4","pages":"291-5"},"PeriodicalIF":0.0,"publicationDate":"1978-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"11933971","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
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