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Comptes rendus hebdomadaires des seances de l'Academie des sciences. Serie D: Sciences naturelles最新文献

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[Action of cadmium on a free dinoflagellate Prorocentrum micans E: growth, cadmium absorption and cell modifications]. 镉对游离鞭毛藻micans原心菌E的作用:生长、镉吸收和细胞修饰。
Comptes rendus hebdomadaires des seances de l'Academie des sciences. Serie D: Sciences naturelles Pub Date : 1978-10-09
P Prévot, M O Soyer
{"title":"[Action of cadmium on a free dinoflagellate Prorocentrum micans E: growth, cadmium absorption and cell modifications].","authors":"P Prévot,&nbsp;M O Soyer","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The study of the growth of Prorocentrum micans E. submitted to sublethal doses of cadmium demonstrated a high sensitivity of this Dinoflagellate to the polluant starting with concentration of 5 microgram/l. The uptake of cadmium was measured by pulse polarographic analysis of the filtered culture medium. Structural modifications, not apparent in living cells, are visible after fixation. The high sensitivity of Prorocentrum micans to cadmium, also its easy culture, makes it a suitable pollution indicator of this heavy metal.</p>","PeriodicalId":10544,"journal":{"name":"Comptes rendus hebdomadaires des seances de l'Academie des sciences. Serie D: Sciences naturelles","volume":"287 8","pages":"833-6"},"PeriodicalIF":0.0,"publicationDate":"1978-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"11324070","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
[Seasonal plasma testosterone variations in the stone marten]. [石貂血浆睾酮的季节性变化]。
Comptes rendus hebdomadaires des seances de l'Academie des sciences. Serie D: Sciences naturelles Pub Date : 1978-10-02
M C Audy
{"title":"[Seasonal plasma testosterone variations in the stone marten].","authors":"M C Audy","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Plasma testosterone levels change with annual sexual cycle of the stone marten. Very low during the decrease and the quiescence of the testis, it rises during the testis onset and reaches a maximal peak during the coït period (May to July).</p>","PeriodicalId":10544,"journal":{"name":"Comptes rendus hebdomadaires des seances de l'Academie des sciences. Serie D: Sciences naturelles","volume":"287 7","pages":"721-4"},"PeriodicalIF":0.0,"publicationDate":"1978-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"11324063","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
[Suppression of the mixed lymphocytic reaction by autologous red cells and their constituents: a new hypothesis on the apparent tolerogeneic effect of blood transfusions during transplantation]. [自体红细胞及其成分对混合淋巴细胞反应的抑制:关于移植过程中输血明显耐受性作用的新假设]。
Comptes rendus hebdomadaires des seances de l'Academie des sciences. Serie D: Sciences naturelles Pub Date : 1978-10-02
P Keown, B Descamps
{"title":"[Suppression of the mixed lymphocytic reaction by autologous red cells and their constituents: a new hypothesis on the apparent tolerogeneic effect of blood transfusions during transplantation].","authors":"P Keown,&nbsp;B Descamps","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Using the lymphocyte reaction (MLR) as an in vitro model of allogeneic response we have demonstrated that red blood cells (RBC), when phagocytosed by monocytes present in the reaction, induce almost complete suppression of the MLR. A similar effect is achieved by the RBC lysate or purified hemoglobin. These data strongly suggest that the better graft tolerance apparently induced by blood transfusion given to the recipient at the time of transplantation may result from a non specific immunodepressive process induced by the injected erythrocytes, and mediated by the monocyte.</p>","PeriodicalId":10544,"journal":{"name":"Comptes rendus hebdomadaires des seances de l'Academie des sciences. Serie D: Sciences naturelles","volume":"287 7","pages":"749-52"},"PeriodicalIF":0.0,"publicationDate":"1978-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"11372229","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 platinum derivatives on the inducible and repressible liver microsomal enzyme systems in the rat: inhibition of zoxazolamine-hydroxylase and induction of dimethyl-nitrosamine demethylase isoenzymes by cis-dichlorodiamine platinum (cis-PtCl2(NH3)2) and ammonium hexachloroplatinum (PtC16(NH4)2)]. [铂衍生物对大鼠诱导型和抑制性肝微粒体酶系统的影响:顺式二氯二胺铂(顺式ptcl2 (NH3)2)和六氯铂铵(PtC16(NH4)2)对唑唑胺羟化酶的抑制和对二甲基亚硝胺去甲基酶同位酶的诱导]。
Comptes rendus hebdomadaires des seances de l'Academie des sciences. Serie D: Sciences naturelles Pub Date : 1978-10-02
H Dophuoc, R Truhaut
{"title":"[Effect of platinum derivatives on the inducible and repressible liver microsomal enzyme systems in the rat: inhibition of zoxazolamine-hydroxylase and induction of dimethyl-nitrosamine demethylase isoenzymes by cis-dichlorodiamine platinum (cis-PtCl2(NH3)2) and ammonium hexachloroplatinum (PtC16(NH4)2)].","authors":"H Dophuoc,&nbsp;R Truhaut","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Two platinum derivatives, cis-PtCl2(NH3)2 and PtCl6(NH4)2 have been studied for their effects on the Rat on cytochrome P450 in hepatic parenchyma on zoxazolamine-hydroxylase, a typical inducible system and on the two isoenzymes of dimethyl-nitrosamine demethylase, typical repressible systems. The inhibitory effect of PtCl6(NH4)2 on zoxazolamine-hydroxylase activity, previously shown by the authors, has been confirmed. The cis-PtCl2(NH3)2 also significantly inhibits zoxazolamine-hydroxylase activity. On the other hand, both of the platinum derivatives decrease cytochrome P450 level and enhance the dimethyl-nitrosamine metabolism. These various effects and their relationship are discussed.</p>","PeriodicalId":10544,"journal":{"name":"Comptes rendus hebdomadaires des seances de l'Academie des sciences. Serie D: Sciences naturelles","volume":"287 7","pages":"757-62"},"PeriodicalIF":0.0,"publicationDate":"1978-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"11324066","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
[Decrease in stimulation and allogeneic response following experimental infection of mice with human adenovirus 5]. [实验性感染人类腺病毒5型小鼠后刺激和异体反应的减少]。
Comptes rendus hebdomadaires des seances de l'Academie des sciences. Serie D: Sciences naturelles Pub Date : 1978-10-02
M H Gibourg, J L Touraine, Y Chardonnet, G Dureau
{"title":"[Decrease in stimulation and allogeneic response following experimental infection of mice with human adenovirus 5].","authors":"M H Gibourg,&nbsp;J L Touraine,&nbsp;Y Chardonnet,&nbsp;G Dureau","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>15 days after experimental infection with human adenovirus 5, C57 Bl/6 murine spleen cells were found to have altered in vitro properties. Proliferative response to phytohemagglutinine was slightly increased while the allogeneic response was decreased and the capability to stimulate allogeneic cells was significantly diminished. The degree of expression of surface antigens responsible for allogeneic stimulation is influenced by many regulatory factors, still poorly defined; alteration of some factors of antigenicity may result, directly or indirectly, from certain viral infections.</p>","PeriodicalId":10544,"journal":{"name":"Comptes rendus hebdomadaires des seances de l'Academie des sciences. Serie D: Sciences naturelles","volume":"287 7","pages":"753-6"},"PeriodicalIF":0.0,"publicationDate":"1978-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"11324176","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
[Absorption of double labeled (glycerol 3H-linoleic acid 14C) native bile by phosphatidylcholines]. 磷脂酰胆碱对双标记(甘油3h -亚油酸14C)天然胆汁的吸收。
Comptes rendus hebdomadaires des seances de l'Academie des sciences. Serie D: Sciences naturelles Pub Date : 1978-10-02
D Reisser
{"title":"[Absorption of double labeled (glycerol 3H-linoleic acid 14C) native bile by phosphatidylcholines].","authors":"D Reisser","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Double-labeled bile ([U. 3H glycerol] [1. 14C linoleic acid])--in which about 70% of labeling 14C and 80% of labeling 3H of total lipids were borne by phosphatidylcholines (PC), (isotopic ratio of these PC was equal to 1)--was introduced into the duodenum of test Rats, some of them with a bile fistula. As low amounts of the hydrolysis products of biliary PC were found in the intestinal lumen, a higher hydrolysis must occur further (brush border, enterocyte ?) because, in the mucosa, the highest labeling 14C was present as triglycerides and PC have an isotopic ratio 3H/14C higher than 1. As in the lumen the isotopic ratio 3H/14C of PC was higher than 1 and increased with the time elapsed, this finding suggests that mucosal PC were added to biliary PC (secretion or desquamation ?) unless these modifications were due to luminal micro-organisms. As test Rat bile was poorly labeled a very weak enterohepatic circulation of biliary diunsaturated PC may exist.</p>","PeriodicalId":10544,"journal":{"name":"Comptes rendus hebdomadaires des seances de l'Academie des sciences. Serie D: Sciences naturelles","volume":"287 7","pages":"733-6"},"PeriodicalIF":0.0,"publicationDate":"1978-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"11324064","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 microvascularity of human placental villi]. [人胎盘绒毛的微血管]。
Comptes rendus hebdomadaires des seances de l'Academie des sciences. Serie D: Sciences naturelles Pub Date : 1978-10-02
M Thiriot, M Panigel
{"title":"[The microvascularity of human placental villi].","authors":"M Thiriot,&nbsp;M Panigel","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Scanning electron microscopic observation of plastic casts of human chorionic villi vasculature has demonstrated that in the area of placental exchange two blood capillary networks are present: the paravascular and the villous capillary networks. S.E.M. provides precise information on the shape and anatomical relations of these blood capillary networks.</p>","PeriodicalId":10544,"journal":{"name":"Comptes rendus hebdomadaires des seances de l'Academie des sciences. Serie D: Sciences naturelles","volume":"287 7","pages":"709-11"},"PeriodicalIF":0.0,"publicationDate":"1978-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"11324062","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
[Nicotinamide desamidase in the culture medium of neuroblastoma cells]. [神经母细胞瘤细胞培养基中烟酰胺脱酰胺酶的研究]。
Comptes rendus hebdomadaires des seances de l'Academie des sciences. Serie D: Sciences naturelles Pub Date : 1978-10-02
A Dierich, M Wintzerith, P Mandel
{"title":"[Nicotinamide desamidase in the culture medium of neuroblastoma cells].","authors":"A Dierich,&nbsp;M Wintzerith,&nbsp;P Mandel","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Important amounts of nicotinic acid appear in the growth medium of neuroblastoma cell cultures. It is shown that an enzyme released by the cells into the growth medium deamidates the nicotinamide supplied by the growth medium to nicotinic acid.</p>","PeriodicalId":10544,"journal":{"name":"Comptes rendus hebdomadaires des seances de l'Academie des sciences. Serie D: Sciences naturelles","volume":"287 7","pages":"741-3"},"PeriodicalIF":0.0,"publicationDate":"1978-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"11324065","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 lymphokines produced in a grafted system on production of prostaglandins by macrophages]. 移植系统中产生的淋巴因子对巨噬细胞产生前列腺素的影响。
Comptes rendus hebdomadaires des seances de l'Academie des sciences. Serie D: Sciences naturelles Pub Date : 1978-09-25
M Dy, M Astoin
{"title":"[Effect of lymphokines produced in a grafted system on production of prostaglandins by macrophages].","authors":"M Dy,&nbsp;M Astoin","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Mice peritoneal macrophages cultured in vitro release a prostaglandin-like activity as evaluated by a bio-assay using Rat stomach fundus. The prostaglandin release is greatly increased when macrophages are incubated with the supernatant of mixed lymphocyte cultures between recipient and donor of a skin allograft. This phenomenon was found in all strains of Mice tested except C3H/HeJ Mice, a strain already known for its defective responsiveness to bacterial lipopolysaccharide (LPS).</p>","PeriodicalId":10544,"journal":{"name":"Comptes rendus hebdomadaires des seances de l'Academie des sciences. Serie D: Sciences naturelles","volume":"287 6","pages":"663-6"},"PeriodicalIF":0.0,"publicationDate":"1978-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"11324061","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
[Molecular weight of lipovitellins during egg development in the crustacean amphipod Orchestia gammarella (Pallas)]. [甲壳类片足类Orchestia gammarella (Pallas)中卵细胞发育过程中脂维磷脂的分子量]。
Comptes rendus hebdomadaires des seances de l'Academie des sciences. Serie D: Sciences naturelles Pub Date : 1978-09-25
H Junera
{"title":"[Molecular weight of lipovitellins during egg development in the crustacean amphipod Orchestia gammarella (Pallas)].","authors":"H Junera","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Egg lipovitellins of Orchestia gammarella tested by electrophoresis on gels of different acrylamide concentrations, following the procedure of Hedrick and Smith (1968), display a migration pattern identical to that of proteins with molecular weights of congruent to 3.2 x 10(5) (lipovitellin I) and congruent to 5.5 x 10(5) (lipovitellin II) respectively. Since their molecular weight remains constant during embryogenesis, the changes of their relative mobility in disc gels indicates alterations in their ionic charges.</p>","PeriodicalId":10544,"journal":{"name":"Comptes rendus hebdomadaires des seances de l'Academie des sciences. Serie D: Sciences naturelles","volume":"287 6","pages":"651-4"},"PeriodicalIF":0.0,"publicationDate":"1978-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"11324180","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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