jeanflop/post_ocr_correction2 huggingface dataset:
most probably a function of host cellular activity and forms perhaps a defensive reaction of the latter. Mycology Sensitiveness of Parasitic Hymenomycetes to 5-Fluorocytosine, by René Morquer and Annick Touvet Important differences are observed between species of Hymenomycetes parasitic upon forest trees as to sensitiveness to 5-fluorocytosine. Conidiation and rhizomorphogenesis of several species are inhibited by weak doses of this antibiotic. Other species such as Fomes annosus, are much more resistant relative to their growing mycelium; nevertheless actively sporulating strains are more sensitive than paucisporous strains; their kinetic properties are disturbed by this antibiotic. Plant Physiology The Occurrence of Poly (A) Ribonucleic Acid in Silene alba Cells in Batch Suspension Culture, by Serge Rambourg, Jacques Vasseur and Jean Dubois AMF rich RNAs occur during the exponential phase of the growth cycle of Silene alba cells in batch suspension culture. The poly (A) sequence isolated after ribonuclease A and T1 digestion, has a mean size of approximately 130 nucleotides. The Effects of Asparagine and Aerobic or Anaerobic Conditions upon the Carotenogenesis Induction and the Regulation of a Sporulation Rhythm in Leptosphaeria michotii (West) Sacc., by Simone Jerebzoff-Quintin and Stephan Jerebzoff In darkness O2 is not necessary for the regulation of a sporulation rhythm in L. michotii, when asparagine (6.6 x 10-3 M) is given at the replication of the cultures, though rhythm is delayed and the carotenoids "pool" is lower than control. Using 2.6 x 10-3 M of asparagine, O2 furnished at the beginning and white light after an initial 5 day-long dark period, are necessary for the first step of the photoresponse. Fatty Acids of Pollen and Styles in Oenothera missouriensis Sims, Auto-incompatible Species, by Denise Coustaut and Robert Linder Two naturally-occurring methyl esters, methyl oleate and methyl arachidonate were purified from Oenothera missouriensis Sims pollen extracts. The fatty acid composition of the total lipids was established for pollen and un-, self-, and cross-pollinated styles. Capric acid, a growth inhibitor, was only found in the pollen S- extracts. The compatible or incompatible pollination was always accompanied by a prominent decrease of the fatty acid level in the pollinated styles. Influence
sporulation rhythm in L. michotii, when asparagine (6.6 x 10-3 M) is given at the replication of the cultures, though rhythm is delayed and the carotenoids "pool" is lower than control. Using 2.6 x 10-3 M of asparagine, O2 furnished at the beginning and white light after an initial 5 day-long dark period, are necessary for the first step of the photoresponse. Fatty Acids of Pollen and Styles in Oenothera missouriensis Sims, Auto-incompatible Species, by Denise Coustaut and Robert Linder Two naturally-occurring methyl esters, methyl oleate and methyl arachidonate were purified from Oenothera missouriensis Sims pollen extracts. The fatty acid composition of the total lipids was established for pollen and un-, self-, and cross-pollinated styles. Capric acid, a growth inhibitor, was only found in the pollen S- extracts. The compatible or incompatible pollination was always accompanied by a prominent decrease of the fatty acid level in the pollinated styles. Influence of Different Temperatures upon Floral Initiation in Trifolium pratense L., by Pierre Vescovi 1075 In Trifolium pratense L., temperatures spaced from 12 to 32° day-27° night, in day-length of 16 h, allow flowering, but, although for higher temperatures flowering is faster in time, these same temperatures have, on the other hand, no influence upon flowering in space which always appears at the same development stage. Insect Physiology Determination of a Monoaminoxydasic Activity in Locust Brain. Effect of Poisoning by two Insecticides: Chlordimeform and Dieldrin, by Daniel Gripois, Brigitte Moreteau and Francois Ramade 1079 Our investigations have shown up an MAO activity in locust brain, by the use of a radio-isotopic method, as much at larval as at adult stage. This MAO activity is in a sample of 34,3 dpmlmg of brain tissue (wet weight). Investigations have also been undertaken on effects of dieldrin and chlordimeform poisoning on this MAO activity. Even at sublethal dosages, chlordimeform causes a significant inhibition of MAO activity in vivo. This finding is in accordance with Beeman and Matsumura's in vitro. Moreover, acute poisoning by dieldrin produces more than 60 % of inhibition of MAO, 3 hours after administration of 115 gg of this insecticide by
hand, no influence upon flowering in space which always appears at the same development stage. Insect Physiology Determination of a Monoaminoxydasic Activity in Locust Brain. Effect of Poisoning by two Insecticides: Chlordimeform and Dieldrin, by Daniel Gripois, Brigitte Moreteau and Francois Ramade 1079 Our investigations have shown up an MAO activity in locust brain, by the use of a radio-isotopic method, as much at larval as at adult stage. This MAO activity is in a sample of 34,3 dpmlmg of brain tissue (wet weight). Investigations have also been undertaken on effects of dieldrin and chlordimeform poisoning on this MAO activity. Even at sublethal dosages, chlordimeform causes a significant inhibition of MAO activity in vivo. This finding is in accordance with Beeman and Matsumura's in vitro. Moreover, acute poisoning by dieldrin produces more than 60 % of inhibition of MAO, 3 hours after administration of 115 gg of this insecticide by injection in the hemocelian cavity. Invertebrate Physiology Study on Growth and Sexual Differentiation of Penaeus japonicus (Bate) as a Function of Salinity and Temperature, by Jean-Marie Exbrayat and Jean-Paul Bourguet 1083 The influence of different temperature and salinity combinations on the growth of Penaeus japonicus is studied. Ponderal and linear growth curves show three states in the animal: juvenile, pre-adult, and adult. The growth in juveniles is more rapid at a high temperature and moderate salinity; pre-adult growth is increased by high temperature and salinity levels. The linear growth does not reflect the sexual state change which occurs in the animal. Neurophysiology Excitatory Action of Superior Colliculus on the Extra-Ocular Muscle Motoneurons in the Cat, by Alexej Grantyn, Alain Berthoz and Robert Baker 1087 The synaptic actions which might underlie the saccadic eye movements induced by stimulation of the superior colliculus have been studied in the unanesthetized cat encéphale isolé. Intracellular recordings of extraocular muscle medial rectus motoneurons have revealed a minimally disynaptic excitatory projection from the superior colliculus to the ipsilateral medial rectus motoneurons (latency 1.3 to 2.6 msec). C. R. Note. Biology Effects of Various Agents (Ca++ and K+ Ionophores, Organomercurials, Dithiols, Colchicine and Cytochalasine B) on Maturation
growth curves show three states in the animal: juvenile, pre-adult, and adult. The growth in juveniles is more rapid at a high temperature and moderate salinity; pre-adult growth is increased by high temperature and salinity levels. The linear growth does not reflect the sexual state change which occurs in the animal. Neurophysiology Excitatory Action of Superior Colliculus on the Extra-Ocular Muscle Motoneurons in the Cat, by Alexej Grantyn, Alain Berthoz and Robert Baker 1087 The synaptic actions which might underlie the saccadic eye movements induced by stimulation of the superior colliculus have been studied in the unanesthetized cat encéphale isolé. Intracellular recordings of extraocular muscle medial rectus motoneurons have revealed a minimally disynaptic excitatory projection from the superior colliculus to the ipsilateral medial rectus motoneurons (latency 1.3 to 2.6 msec). C. R. Note. Biology Effects of Various Agents (Ca++ and K+ Ionophores, Organomercurials, Dithiols, Colchicine and Cytochalasine B) on Maturation and Differentiation Without Cleavage in Chaetopterus Eggs, by Jean Brachet and Suzanne nenisnnnini 1091 Induction of maturation in Chaetopterus oocytes requires the presence of Ca++ ions in the medium, but differentiation without cleavage can proceed in the absence of this cation. The Ca++ ionophore A 23187 induces both maturation and the cortical reaction provided that Ca++ ions are present in the medium; differentiation without cleavage may follow. Valinomycin slowly induces germinal vesicle breakdown, which is followed by a sharp segregation between hyaloplasm and yolk. PHMPS, but not DTT, induces maturation. Differentiation without cleavage is more sensitive to colchicine than to cytochalasin B. Experimental Embryology Investigation of Fluorigenic Amines in Chick Embryo Notochords Treated with Cholinergics, by Georges Strudel, Robert Meiniel and Gerard Gateau 1097 The investigation of 3 day old notochords by the fluorescence method of Falck and Owman showed an increase of the fluorescence after treatment of the chick embryos at 48 hrs of incubation, with nicotine sulfate or carbachol. The addition of norepinephrine or L-Dopa emphasized the formaldehyde induced fluorescence. The simultaneous treatment with a cholinergic agent and atropine, propranolol or reserpine decreased or suppressed the fluorescence. These results demonstrate the existence of a relationship between the treatment
the cortical reaction provided that Ca++ ions are present in the medium; differentiation without cleavage may follow. Valinomycin slowly induces germinal vesicle breakdown, which is followed by a sharp segregation between hyaloplasm and yolk. PHMPS, but not DTT, induces maturation. Differentiation without cleavage is more sensitive to colchicine than to cytochalasin B. Experimental Embryology Investigation of Fluorigenic Amines in Chick Embryo Notochords Treated with Cholinergics, by Georges Strudel, Robert Meiniel and Gerard Gateau 1097 The investigation of 3 day old notochords by the fluorescence method of Falck and Owman showed an increase of the fluorescence after treatment of the chick embryos at 48 hrs of incubation, with nicotine sulfate or carbachol. The addition of norepinephrine or L-Dopa emphasized the formaldehyde induced fluorescence. The simultaneous treatment with a cholinergic agent and atropine, propranolol or reserpine decreased or suppressed the fluorescence. These results demonstrate the existence of a relationship between the treatment with a cholinergic agent and the amount of chordal biogenic amines. Ecology The Karst as an Ecosystem, by Raymond Rouch 1101 The karstic ecosystem concept is actualized from its two components, the one physical and the other biological. From a physical point of view, a karstic system forms a unit perfectly defined through its own topographic and hydrogeological characteristics. The faunal community which has been recently assessed in Baget (Ariege) demonstrates that the physical unity of this system balances with the ecological one. Therefore, the karstic system, should be now considered as the basic functional unity in ecology, i.e. as the karstic ecosystem. Molecular Biology Binding of Actinomycin D to a DNA Palindrome, by Jerome Lejeune 1105 A model is proposed in which the phenoxazone-ring system intercalates in a palindrome 5'-T-G-C-A-3', while the two cyclopeptides adapt themselves on the bases exposed in the wide groove of DNA. Molecular Biophysics X-ray Diffraction Study of the Collagen from Blood Vessels, by Guy Albisser, Michel Brice, Paul Horn, Alain Larcan and Jean-François Stoltz 1107 An X-ray diffraction study has been undertaken on Human and Rabbit blood vessels. Vessels are stretched 500 % and the diagrams present a great analogy with those obtained from
perfectly defined through its own topographic and hydrogeological characteristics. The faunal community which has been recently assessed in Baget (Ariege) demonstrates that the physical unity of this system balances with the ecological one. Therefore, the karstic system, should be now considered as the basic functional unity in ecology, i.e. as the karstic ecosystem. Molecular Biology Binding of Actinomycin D to a DNA Palindrome, by Jerome Lejeune 1105 A model is proposed in which the phenoxazone-ring system intercalates in a palindrome 5'-T-G-C-A-3', while the two cyclopeptides adapt themselves on the bases exposed in the wide groove of DNA. Molecular Biophysics X-ray Diffraction Study of the Collagen from Blood Vessels, by Guy Albisser, Michel Brice, Paul Horn, Alain Larcan and Jean-François Stoltz 1107 An X-ray diffraction study has been undertaken on Human and Rabbit blood vessels. Vessels are stretched 500 % and the diagrams present a great analogy with those obtained from collagen. Thus, it appears, that it is possible to determine by X-Rays some pathological anomalies of the collagen in vessels. Pharmacodynamics Effect of Acute Hypoxia on Cerebral 3H deoxyglucose Uptake in Mice, by Alain Servin, Ginette Dumont-Thomann and Suzanne Garcet 1111 Hypoxia resulted in a decrease in cerebral 3H deoxyglucose uptake in Mice. Bacteriology Attempt to Find the Global Spontaneous Bacteriolytic Power of Water, by Louis Schwartzbrod, Chantal Finance and Pierre Dixneuf. 1115 The utilization of a technique for the determination of spontaneous bacteriolytic power in surface waters has led us to propose a new way of expressing the spontaneous bacteriolytic power of water: PBSG. PBSG allows us to evaluate the intensity of global spontaneous bacteriolysis and to compare the global spontaneous bacteriolytic powers of different water samples. Virology Decay of the Interferon Induced Antiviral State by PHA, by Alain Pauloin, Françoise Chany-Fournier, Lois Epstein and Charles Chany 1119 Phytohaemagglutinin (PHA M and P forms), when added to L 929 cells previously treated by murine interferon, degrades the antiviral state and restores virus sensitivity in the cells. This degradation depends on the amount of the lectin, the contact period with the cell and the presence of PHA membrane receptors. The
uptake in Mice. Bacteriology Attempt to Find the Global Spontaneous Bacteriolytic Power of Water, by Louis Schwartzbrod, Chantal Finance and Pierre Dixneuf. 1115 The utilization of a technique for the determination of spontaneous bacteriolytic power in surface waters has led us to propose a new way of expressing the spontaneous bacteriolytic power of water: PBSG. PBSG allows us to evaluate the intensity of global spontaneous bacteriolysis and to compare the global spontaneous bacteriolytic powers of different water samples. Virology Decay of the Interferon Induced Antiviral State by PHA, by Alain Pauloin, Françoise Chany-Fournier, Lois Epstein and Charles Chany 1119 Phytohaemagglutinin (PHA M and P forms), when added to L 929 cells previously treated by murine interferon, degrades the antiviral state and restores virus sensitivity in the cells. This degradation depends on the amount of the lectin, the contact period with the cell and the presence of PHA membrane receptors. The importance of membrane configuration not only in the induction but also in the maintenance of the antiviral state is discussed. Immunology Evaluation of Human Complement by Hemolytic Activity After Diffusion in Agarose, by Evelyne Bourret, Madeleine Bastide, Jean-Marie Bastide and Lucette Bardet 1123 The hemolytic activity of human complement is evaluated after diffusion in agarose containing sensitized erythrocytes. The results show a linear relation between hemolysis area and logarithm of concentration. Gynaecology Variations in the Levels of Unconjugated Steroids in Amniotic Fluid During Late Human Pregnancy, by Andre Jouivet and Jean-Pierre Gautray 1127 Levels of cortisol, estradiol and progesterone were measured in 172 amniotic fluid samples collected by amniocentesis during late pregnancy. An increase in cortisol and estradiol levels was observed three weeks before vaginal delivery of term and premature infants; in both types of delivery, onset of labor was spontaneous. In contrast, progesterone levels were only slightly decreased in these cases. Experimental Pathology Hydrothermal Shrinkage of Rat Skin. Modifications with Ageing, by Jean-Claude Allain, Suzanne Bazin, Mady Le Lous and Albert Delaunay 1131 The tension developed in Rat skin by hydrothermal shrinkage is modified with ageing of the animals: the temperature of maximum tension decreases from birth to 1
evaluated after diffusion in agarose containing sensitized erythrocytes. The results show a linear relation between hemolysis area and logarithm of concentration. Gynaecology Variations in the Levels of Unconjugated Steroids in Amniotic Fluid During Late Human Pregnancy, by Andre Jouivet and Jean-Pierre Gautray 1127 Levels of cortisol, estradiol and progesterone were measured in 172 amniotic fluid samples collected by amniocentesis during late pregnancy. An increase in cortisol and estradiol levels was observed three weeks before vaginal delivery of term and premature infants; in both types of delivery, onset of labor was spontaneous. In contrast, progesterone levels were only slightly decreased in these cases. Experimental Pathology Hydrothermal Shrinkage of Rat Skin. Modifications with Ageing, by Jean-Claude Allain, Suzanne Bazin, Mady Le Lous and Albert Delaunay 1131 The tension developed in Rat skin by hydrothermal shrinkage is modified with ageing of the animals: the temperature of maximum tension decreases from birth to 1 month, then very slowly increases with age. At higher temperatures than that of maximum tension a relaxation occurs very rapidly in young Rats and in not yet senescent adult skins. These modifications appeared to be related to those of the nature of the intermolecular collagen cross-links with ageing. COMPTES RENDUS HEBDOMENAIRE DES SEANCES DE L'ACADEMIE DES SCIENCES CONTENTS VOLUME 284 — SECTION D No. 13 — SESSION OF MARCH 28th 1977 Radiochronology Age of 1 066 M.A. by Isochron Rb/Sr on Whole Rocks of Brickaville Granites (East of Madagascar), by Michelle Vachette and Gabriel Hottin 1135 The effects of Kibarian orogenesis upon archean formations east of Tananarive is confirmed by the emplacement of Brickaville granites dated 1,066 M.A. This age of 1,066 M.A. (with 87Sr/86Sr ratio = 0.705,0) has to be compared with the age of 1,115 M.A. (with 87Sr/86Sr ratio = 0.704,4) of Tananarive granites. Geochemistry Utilization of Ion-Exchange Properties of Tin Dioxide for REE Neutron Activation Analysis in Rock Samples, by Chantal Courtois and Nicole Jaffrezic-Renault 1139 In neutron activation analysis, iron and scandium are the main elements which disturb REE detection in rock samples. These two elements are eliminated by fixation on tin dioxide in a (nitric
HEBDOMENAIRE DES SEANCES DE L'ACADEMIE DES SCIENCES CONTENTS VOLUME 284 — SECTION D No. 13 — SESSION OF MARCH 28th 1977 Radiochronology Age of 1 066 M.A. by Isochron Rb/Sr on Whole Rocks of Brickaville Granites (East of Madagascar), by Michelle Vachette and Gabriel Hottin 1135 The effects of Kibarian orogenesis upon archean formations east of Tananarive is confirmed by the emplacement of Brickaville granites dated 1,066 M.A. This age of 1,066 M.A. (with 87Sr/86Sr ratio = 0.705,0) has to be compared with the age of 1,115 M.A. (with 87Sr/86Sr ratio = 0.704,4) of Tananarive granites. Geochemistry Utilization of Ion-Exchange Properties of Tin Dioxide for REE Neutron Activation Analysis in Rock Samples, by Chantal Courtois and Nicole Jaffrezic-Renault 1139 In neutron activation analysis, iron and scandium are the main elements which disturb REE detection in rock samples. These two elements are eliminated by fixation on tin dioxide in a (nitric acid-acetone) medium. The results achieved on international standards are in good agreement with bibliographical values. The Specific Dynamics of Silicate, Iron with Water-Soluble Organic Acids, by Mohammed Razzaghe and Michel Robert 1143 The iron release from micas by the main organic acids of the biosphere is studied. At pH > 3 ferrous iron is easily released but not ferric iron. Iron remains under this ferrous state in the solution and compounds are easily destroyed. Three acids display complexing properties during chemical release and among them oxalic and citric solutions show ferric iron and more stable complexes. Geology Occurrence of an Ashgillian Limestone in the Eastern Armorican Massif; its Bearing on the Age of the Late Ordovician Glacio-Marine Deposits, by Marcel Weyant, Francis Dore, Jean Le Gall and Jacques Poncet. 1147 The presence of the Ashgillian stage in the Northeastern Armorican Massif is ascertained for the first time on conodont evidence. Conodonts are recovered from the "Calcaire des Vaux", an exceedingly rare remnant of the Ordovician carbonate sedimentation in this area. An identical limestone, bearing almost the same fauna, occurs as numerous boulders within the glacio-marine deposits (Tillite de Feuguerolles), hitherto considered to be of Caradocian age. This finding provides a
3 ferrous iron is easily released but not ferric iron. Iron remains under this ferrous state in the solution and compounds are easily destroyed. Three acids display complexing properties during chemical release and among them oxalic and citric solutions show ferric iron and more stable complexes. Geology Occurrence of an Ashgillian Limestone in the Eastern Armorican Massif; its Bearing on the Age of the Late Ordovician Glacio-Marine Deposits, by Marcel Weyant, Francis Dore, Jean Le Gall and Jacques Poncet. 1147 The presence of the Ashgillian stage in the Northeastern Armorican Massif is ascertained for the first time on conodont evidence. Conodonts are recovered from the "Calcaire des Vaux", an exceedingly rare remnant of the Ordovician carbonate sedimentation in this area. An identical limestone, bearing almost the same fauna, occurs as numerous boulders within the glacio-marine deposits (Tillite de Feuguerolles), hitherto considered to be of Caradocian age. This finding provides a better understanding of the relationships with some other segments of the Hercynian belt. Tectonics Tectonic Evolution in the Western Part of the Domaine "Centre-Armoricain" (Brittany) during Devonian and Carboniferous Periods, by Jean-René Darboux, Michel Gravelle, Annik Pelhate and Joel Rolet... 1151 Comparative structural studies in Devonian and Carboniferous terrains of the Rade de Brest area, "Monts d'Arrée" hills and western part of the Chateaulin basin, emphasize the importance of the previscian tectonic activity (Bretonic phase?), involving recumbent folding, shearing and low grade metamorphism. The Tectogenetic Interest of the Theux Window (Ardenne, Belgium), by Claude Klein 1155 The placing of the "Vesdre nappe" was accompanied by a complete overturning of the carboniferous formations of the Theux window. Later, the roots of the overthrust sheet were further tectonically along the Jeroumont-Jehanster fault. Finally, submeridian late-variscan shearing cut up the Stavelot massif and its Devonian coverings, between Tiege and Surles; as between La Reid and Hodbomont. Paleontology Anatomy and Kindred of Tabulata Assignable to Ischyrospongia (Sponges), by Henri Termier and Geneviève Termier 1159 Tabulata are near neighbours of Sclerospongia and of Merlia as well as of fossil Pharetronida and Permosphincta. Like the latter, the walls may or may not be porous, and passing