jeanflop/post-ocr-correction huggingface dataset:
distinct physiological role for the 2-8 heptapeptide, mediated via such A II binding sites. Invertebrate Physiology Occurrence of a Winter-Diapause in the Spider Pisaura mirabilis C.L. (Pisauridae) by the Action of Hormonal Treatments, by Jean-Claude Bonaric 1297 In the same experimental conditions, injections of ecdysterone induce moulting phenomena appearing after significantly different times according to whether the nymphs of Pisaura have been captured in October or January. The variable sensitivity of the spiders towards an equal amount of hormones allows us to confirm the occurrence of winter-diapause in this Arachnid. Insect Physiology Activity of Corpora Allata of Diapausing Females of
Insect Physiology Activity of Corpora Allata of Diapausing Females of Tetrix undulata (SWRB) (Orthoptera-Tetrigidae), by Michel Potas 1301 The implantation of one or two pairs of corpora allata of diapausing females in another diapausing female (two weeks old) induces vitellogenesis and laying of one, two or three egg-pods in a great number of females. The denervation of the corpora-allata of a diapausing female also induces vitellogenesis, These results suggest that corpora-allata of diapausing females are not active. The denervation induces the break of the inhibition travelling by the corpora-allata-cardiaca nerves or stimulates the corpora-allata. Endocrinology High Affinity Estradiol Binding in
or stimulates the corpora-allata. Endocrinology High Affinity Estradiol Binding in the Adrenal Cortex, by Pierre M. Martin, Claude Cochet, Pierre H. Rolland and Edmond M. Chambon: 1305 Evidence is presented demonstrating the presence of a high affinity (Ka 108 M-1), limited capacity (3-4 pmoles/mg protein) estradiol binder in the soluble fraction of the Bovine, Rat and Human adrenal cortex. The binding appears specific to the estrogen structure whereas C19 and C21 steroids do not bind. Upon sucrose density gradient centrifugation, the estradiol binder sedimented at 9 S at low ionic strength and was shifted to 4.5 S in the presence
strength and was shifted to 4.5 S in the presence of 0.5 M KCl. This demonstration of a receptor-like moiety for estradiol in the adrenal cortex lends biochemical support to previous observations suggesting that adrenal cortex functions may be modulated by a direct effect of gonadal steroid hormones. Protein Synthesis Stimulation by ACTH on Adrenal Cells in Culture. Lack of Effect of Cyclic AMP. By Alice Dazord, Dominique Gallet and Jose M. Saez 1309 ACTH stimulates the incorporation of 14C-leucine into proteins of adrenal tumor cells in culture. This stimulation though about 20 % over controls is statistically significant. Cyclic
though about 20 % over controls is statistically significant. Cyclic AMP did not reproduce the stimulation observed with ACTH. Stimulation of LH and FSH Secretion and Increase of Testicular Weight at Birth, in the Rat, by Jacques Rofty, Philippe Corbier and Bernard Kerdelhue 1313 The evolutions of serum LH and FSH concentrations and of testicular weight have been measured in the newborn Rat before, during and up to 24 hrs. after birth. A sudden and transient increase of LH and FSH is observed at birth. The testicular weight rises rapidly between 2 and 4 hrs. Investigation of the Cortical Fields
between 2 and 4 hrs. Investigation of the Cortical Fields of Potential Produced by Weak Luminous Stimulation in the Adult Rabbit, by Madeleine Le Louis, Ginette Piat and Paul Laget 1317 On a chronic preparation of an adult Rabbit, the cortical visual evoked response, produced by a weak luminous stimulation activating only the scotopic system, is characterized by the suppression of the early surface-positive phase and by a lengthening of the latencies of the following deflection. The profile of the fields of potential corresponding to the various deflections in relation to the depth, has been investigated. Selective Representation of Vibrissae
to the depth, has been investigated. Selective Representation of Vibrissae on Cerebellar Purkinje Cells through Climbing Fibers in the Rat. By Herbert Axelrad and Francis Crepel, 1321 In the Rat peripheral information from snout vibrissae are transmitted to cerebellar Purkinje cells of Crus I and II by both mossy and climbing fibers. The climbing fiber pathway is organized in a very precise manner, a particular Purkinje cell being preferentially activated by a single vibrissa. Model of Action of 4-Aminopyridine at the Level of Potassium "Channels" in the Squid Giant Axon (Loligo forbesi L.), by Hans Albers and Yves Pichon. 1325
(Loligo forbesi L.), by Hans Albers and Yves Pichon. 1325 Most of the effects of 4-aminopyridine on the potassium conductance of the giant axon of the Squid can be explained in terms of a simple model based on the physicochemical properties of the molecule and what is known about the structure of the potassium "channels". GABA Implication in Spatial Organization of Receptive Fields of the Ganglion Cells in the Frog Retina, by Nicole Bonaventure, Guy Roussel and Arlette Haehnel 1329 An histoautoradiographic study of the Chicken and Frog retinas was made following an intravitreal injection of tritiated GABA. This amino
made following an intravitreal injection of tritiated GABA. This amino acid was especially fixed at the amacrine and horizontal cell level. It has been suggested (Werblin, 1974) that horizontal cells might be responsible for the spatial organization of the receptive fields of retinal ganglion cells. GABA could thus be involved in bringing about the centre-surround arrangement of the latter receptive fields. We have shown that picrotoxin, a specific GABA-antagonist, does indeed provoke marked changes in the activity of retinal ganglion cells. It provokes a decrease in the response threshold, a facilitation of spontaneous activities, and a marked increase in the
facilitation of spontaneous activities, and a marked increase in the receptive field area of the ON-OFF ganglion cells: from 12° at the start, it reaches 24° under the effect of picrotoxin. Hypermasculinization of Anterior Pereiopods in the Male Seashore Woodlouse Ligia oceanica (L.) Relation to its Senescence-Linked Growth, by Hagieme Inagaki and Josette Berreur-Bonnenfant, 1333 The male woodlouse continuing its postpuberal growth gets overbreadth and so hypermasculinized anterior pereiopods I, II and III, notwithstanding vigor waning owing to its senescence. This hypermasculinization, which can be deemed to be an upshot of the discontinuous but always overpowering (oc > 1) allometric
of the discontinuous but always overpowering (oc > 1) allometric growth of anterior pereiopod breadth (measured on the propodic level), seems to come from two mechanisms: multiplication and size enlargement of epidermal and muscular cells of the appendix. The latter mechanism may be the only broadening factor of senescent woodlouse's anterior pereiopods. Antagonistic Action of Dietary Purine and Pyrimidine Nucleotides on Artemia salina Appendicular Morphogenesis, by Arantxa Hernández 1337 Dietary CMP excess increased the AMP concentration threshold inducing supernumerary gonopods. The morphogenetic action of AMP deficiency is no longer induced in a medium lacking pyrimidine. Radioautographic Studies of in vitro
in a medium lacking pyrimidine. Radioautographic Studies of in vitro RNA Synthesis in the Course of Oogenesis in Parascaris equorum (Parasite Nematode), by Joliette Starck and Jean Brun 1341 Technical elaboration of in vitro incubation of Parascaris equorum gonads with 3H-Uridine has permitted, for the first time, the study of RNA synthesis during oogenesis along the whole gonadic tube. In germ cells, oocytes in diakinesis (oviduct) and in division of maturation (uterus) show no label. On the contrary, oogonia and growing oocytes in ovary are labelled. RNA synthesis is always detected in all parietal cells but is more active in
detected in all parietal cells but is more active in oviduct and uterus where the gonadic wall is particularly developed. Mutants of Escherichia coli Deficient in 4-Thiouridine, by Gilles Thomas and Alain Favre 1345 Thirteen different mutants of E. coli K12 selected for a reduced near ultraviolet-induced growth delay have been isolated. The t-RNAs extracted from these clones have all a depressed content of 4-thiouridine. One of these mutants, called Nop, has an almost negligible growth delay and completely lacks 4-thiouridine in its t-RNAs, Thus, it provides genetic proofs that 4-thiouridine is the chromophore for growth delay. Biochemistry Effects of
4-thiouridine is the chromophore for growth delay. Biochemistry Effects of Four Detergents Upon the Respiration of Isolated Rat Liver Mitochondria, by Jean-Paul Carreau and Paul Mazliak. The effects of these four detergents (two non-ionic: Triton X100 and Tween 80, two ionic: sodium cholate and sodium deoxycholate) upon the respiratory intensities of mitochondria and upon the ADP/O and respiratory control ratios were observed. At low concentrations and in the absence of exogenous ADP, non-ionic as well as ionic detergents provoked a threefold (or fourfold) increase of the respiratory intensities of mitochondria. At higher concentrations, the four detergents were inhibitory for mitochondrial
At higher concentrations, the four detergents were inhibitory for mitochondrial oxidations in the order: Triton X 100 > DOC > cholate > Tween 80. At increasing doses, the four detergents progressively decreased the phosphorylating capacities of mitochondria. Biochemistry Solubilisation and Purification with Sodium Deoxycholate of the (Na+-K+)-Dependent ATPase from Human Erythrocyte Ghosts, by Josette Chauillon, Monique Thuet and Marie-Hélène Authier. The (Na+-K+)-dependent ATPase prepared from human erythrocyte ghosts has been purified with sodium deoxycholate in a high ionic medium. After the purification, 60 % of the native activity bound to the membranes was recovered. Spontaneous Phospholipase A Activity of Rat
the membranes was recovered. Spontaneous Phospholipase A Activity of Rat Pancreas Homogenate, by Suzanne Durand, François Clemente, Jacques Lloveras, Jean-Paul Thouvenot and Louis Douste-Blazy. Rat pancreas presents a spontaneous phospholipase A activity which appears before trypsin activation at optimal pH 6.5. The responsible enzyme is independent of pancreatic prophospholipase A, as can be seen through experiments done in the presence of trypsin inhibitors. On the other hand, this enzyme is distinct from excretory phospholipase which is more active and whose optimal pH is 8.8. Thermostability and insensibility of spontaneously active phospholipase A to DFP differentiate it from lipase, carboxyl-esterhydrolase and
phospholipase A to DFP differentiate it from lipase, carboxyl-esterhydrolase and lysophospholipase, respectively. Behaviour and quantity of catecholamines: comparative study of gregarious, and solitary insects and those treated by carbon dioxide; Locusta migratoria (Insects, Orthoptera), by Suzel Futeau-Braesch. The dopamine (DA) and noradrenaline (NA) was measured in Locusta migratoria for 3 groups of individuals showing differences in their motility: gregarious are very active, solitary and animals in chronic treatment by CO2 (1 mn/day) show a very low motility. NA is present in small amounts (0,120-0,250 μg/g) in the 3 groups without significant differences. On the contrary, the quantity of DA is
significant differences. On the contrary, the quantity of DA is 5 times greater in gregarious than in the 2 other groups (1,78 and 0,31-0,39 μg/g). Thus it is suggested that DA is related to motility and must play its own role of a neurohormone, distinct from that of a metabolic intermediary between DOPA and NA. The question of a relationship between the metabolism of catecholamines and melanization is open. Bacteriology In vivo morphological study of different vegetative systems and reproduction in Gaussenia bacteriospiralis nov. gen. nov. sp., by Georges Labroue. A new microorganism of bacterial origin, parasite of Triodia eragrostoides
A new microorganism of bacterial origin, parasite of Triodia eragrostoides Vasey and Scribn., a Mexican gramineae, has been named Gaussenia bacteriospiralis. It shows a very curious reproduction and a rather diversified vegetative system. Both are analysed and described inside and outside the host plant. COMPTES RENDUS HEBDOMONAUX DES SÉANCES DE L'ACADÉMIE DES SCIENCES CONTENTS VOLUME 284 — SECTION D No. 15 — SESSION OF APRIL 18th 1977 Radiochronology Pan-African Rejuvenation of Granites in Anosy Range, Esira Area (south-east of Madagascar), by Michelle Vachette and Gabriel Hottin. The granitic and charnockitic formations in the anosy range yield an age of 655
formations in the anosy range yield an age of 655 ± 27 My. with an intercept of 0.742,6 ± 0.000,9, which means the immobilisation of an older material. The age of 1.140 ± 300 My. obtained previously on a monazite from a pegmatite which cut these granites, confirms this rejuvenation and shows the importance of the pan-african event in this area, south-east of Madagascar. Geochemistry Formation of Zeolites in the Weathering of a Gabbroic Rock from the Body of Pallet (Loire-Atlantique, France), by Philippe Didier. Mineralogical studies by X-ray diffraction have revealed the presence of two zeolites in the plagioclase
have revealed the presence of two zeolites in the plagioclase feldspars of a weathered profile developed on the gabbroic body of Pallet (Loire-Atlantique, France) : a mineral in the heulandite-clinoptilolite series and another like chabazite. Chemical evolution of these feldspars occurs towards the area of calcic and calco-alkali zeolites with loss of calcium, sodium, aluminium and relative gain of silicon. Geology The Discovery of a Thermal Dome in the Western Part of the Alcudian Valley (Western Almaden, Sierra Morena, Spain), by Max Vidal and Yannick Lozac'h. An hercynian thermal high, related to a structural accident, may be inferred from changes
related to a structural accident, may be inferred from changes in metamorphism and cleavage in alcudian and paleozoic sediments. The study of cleavage confirms the results from crystallinity index measurements in illite. Geomicrobiology Mineralisation of Experimental Carbonated Deposits of Microbian Origin. Comparison of Calcareous Rocks by Biogenesis to Actual Ones and Fossils as observed in Nature, by Jean-Pierre Adolphe and Catherine Marechal. In vitro, bacterian veils construct crystallisations and calcareous rocks comparable to actual sedimentary rocks and fossils. Paleontology The Genus Groenlandaspis Heintz (Pisces, Placodermi, Arthrodira) in the Devonian of Asia, by Philippe Janvier and Alexander Ritchie. The late Devonian
Asia, by Philippe Janvier and Alexander Ritchie. The late Devonian arctolepid arthrodire, Groenlandaspis, first recorded from the Upper Devonian of East Greenland and then discovered in the Devonian of Antarctica, Australia, England and Ireland, is described here, for the first time, from the Devonian of Asia. The new material originates from southern Turkey and from north-eastern Iran; a new species, G. seni. is described from the Turkish deposits. Some remarks are also made on the palaeobiogeography of Devonian placoderm fishes. Paleontology The Miocene Mastodonts of the Aquitaine Basin: a Taxonomic Account, by Pascal Tassy. Three species of Mastodonts are retained
Account, by Pascal Tassy. Three species of Mastodonts are retained in the Miocene of the Aquitaine Basin. The Burdigalian-Vindobonian bunodont Mastodont Gomphotherium angustidens (Cuvier), the contemporaneous zygodont Mastodont Zygolophodon turicensis (Schinz) and the late Vindobonian and. Vallesian bunodont Mastodont Tetralophodon longirostris (Kaup), A New Genus of a Hominoid Primate in the Vallesian (Upper Miocene) of Macedonia, by Louis de Bonis and Jean Melentis 1393 The latest field trips in the Vallesian of Macedonia allowed us to complete our knowledge of the fauna of the locality of the Ravine of the Rain and also to find an upper jaw of an
Rain and also to find an upper jaw of an hominoid Primate belonging to a new genus: Ouranopithecus. Plant Physiology Preliminary Results on the Proline Metabolism in Relation to Drought Resistance, by Camille Hubac, Daniele Guerrier and Jean Ferran 1397 The consecutive metabolism in addition to radioactive proline has been studied on the leaf discs of Gossypium submitted to water-stress. Glycolic acid is particularly marked, this leads us to hypothesize the action of proline on photorespiration. Aster tripolium Leaf Cell Wall Composition: Salt-induced Changes of Pectic Polysaccharides, by Alain Perrelle 1401 Aster tripolium leaf cell wall composition is modified by
1401 Aster tripolium leaf cell wall composition is modified by NaCl: the percentage of arabinose is enhanced; the amount of uronic acid is lowered but its degree of esterification remains high. Research on the Vegetative Propagation of Douglas fir: Pseudotsuga menziesii (Mirb) Franco. Possibilities of Obtaining Viable Plants from in vitro Culture of Young Orlets, by Michel Boulay and André Franclet 1405 Buds of Douglas fir gathered from ortets of various ages have been cultivated in vitro. The successive use of three different media can give a viable plantlet if the ortet is less than two years old. If the
the ortet is less than two years old. If the ortet is more than two years old, the bud growth on the media is very slow. It has been possible to speed the growth of senile clone by using axillary shoots given by the senile bud after "in vitro pruning" of the apical meristem and not-yet-expanded leaves. Action of Auxin on P I 3 Endoglucanase Activities in Phaseolus aureus Hypocotyl Segments, by Renée Goldberg 1409 In Phaseolus aureus hypocotyl segments, more than 80 % of the β 1 3 endoglucanase activity is located in particular fractions. Incubation of hypocotyl segments
activity is located in particular fractions. Incubation of hypocotyl segments in an IAA solution (5 x 10-6 M) induces an increment of soluble and particular endoglucanase activities compared with the activities of segments incubated in a millimolar buffer without IAA. Inhibition of Flowering of Photoperiodically Induced Anagallis arvensis by Zeatin Treatments, by Denise Fontaine, Nicole Dugue and Émile Miginiac 1413 The laying of a zeatin solution on the apical zone of plants during the induction and the expression phases modifies significantly the response of the treated plants compared with the untreated ones. With a high concentration the flowering can be
untreated ones. With a high concentration the flowering can be inhibited quasi completely; with a lower concentration the flowering of only one of two generally flowering nodes is inhibited. Plant Biology Benzylaminopurine Binding to the Ribosomes From Male and Female Flowers of Mercurialis annua L., by See-Ryun Chung, Raymonde Durand and Bernard Durand 1417 Benzylaminopurine binds specifically to the several different subcellular fractions prepared from male flower buds of M. annua. Cytokinin binds about two-fold greater to ribosomes from male flower buds than to female ones (1,85 moles of benzylaminopurine per mole of male ribosomes with a Kd of 0,42
per mole of male ribosomes with a Kd of 0,42 nM and 0,96 moles per female ribosomes with a Kd of 0,30 nM). In male tissue which is poor in endogenous cytokinins, nevertheless, there exist specific receptors for benzylaminopurine. Histochemistry Ultrastructure and Histological Localisation of Xylans in the Primary Walls of Arundo donax Tissues, by Katia Ruel, Jean Comtat and Fernand Barnoud 1421 By the use of an endoxylanase, it was possible to show that xylans are present in all the primary walls of the immature internodes of Arundo donax. Their distribution varies according to the cell types and is
Their distribution varies according to the cell types and is not uniform in a given wall. Fibrous elements are separated during the lysis of the xylati matrix thereby pointing out the cementing role of the xylans in the growing wall. Animal Cytology Comparative Action of Three Spindle Inhibitors on Segmentation Mitoses (Glutaraldehyde, Colchicine and Phenyl Urethane), Ultrastructure of the Abnormal Mitoses Obtained, by Yadigar Ates and Paul Senêt 1425 The alterations of the ultrastructure of poles and kinetochores by action of the three spindle inhibitors show important qualitative differences in their mode of action. Endocrinology Desensitization to hCG: Evidence for
their mode of action. Endocrinology Desensitization to hCG: Evidence for an hCG Dependent Negative Control of the Gonadotropin Receptors in the Testicular Leydig Cells, by France Haour, Pascale Sanchez, Dominique Gallet and José M. Sáez 1429 A single injection of hCG (500 IU) to intact and hypophysectomized prepubertal Rats increases plasma testosterone levels and decreases hCG receptors in the testicular Leydig cells for 4 to 5 days. In intact animals testosterone exhibits a rapid increase within hours and a delayed paradoxical increase between 60 and 96 hours. In hypophysectomized animals the first peak is not present. In both intact and
the first peak is not present. In both intact and hypophysectomized Rats hCG receptors are almost undetectable between 10 and 96 hours following hCG injection. Since receptor occupancy cannot account for this phenomenon it is concluded that hCG is exerting a negative control on its own receptors. Insect Neuro-Endocrinology Medial Neurosecretion after Cutting the Hypocerebrocardial Nerves in the African Locust, by Josiane Girardie and Adrien Girardie 1433 The severance of the two hypocerebrocardial nerves does not prevent the discharge of the electrostimulated medial neurosecretory cell bodies. The feedback of the provoked release, which induces the discharge of the medial cell
provoked release, which induces the discharge of the medial cell bodies, is transmitted by the medial neurosecretory fibers. Neurochemistry Effects and Lethality of Chloroiodoquine in Various Strains of Mice, by Max Recasens, Yoshiro Aoki and Paul Mandel 1437 Chloroiodoquine has been implied in numerous cases of myeloneuropathy in Japan, while in other countries although equally frequently used, only a few cases have been reported after treatment with this drug. Studies on the effect of chloroiodoquine in mice of various inbred strains or from crossings between sensitive and insensitive strains demonstrated a genetic predisposition of sensitivity to chloroiodoquine. Biology The Imaginal
a genetic predisposition of sensitivity to chloroiodoquine. Biology The Imaginal Diapause Break in Females of Tetrix undulata (Sow.) (Orthoptera. Tetrigidae by Cauterisation of the Region of the pars intercerebralis, by Michel Poras The electrocauterisation of the region of the pars intercerebralis in diapausing females involves the ovocyte development with vitellogenesis and even the lay. It seems this "operation" involves the destruction of the center responsible for the inhibition of the corpus allatum. Experimental Biology Loss of the Restoration Power of Imaginal Leg Analage of Tenebrio Molitor (Insect. Coleoptera) and Establishment of imaginal Determinations During the Last Larval Instar, by Jean-Jacques
of imaginal Determinations During the Last Larval Instar, by Jean-Jacques Lenoir-Rousseaux In the pharate pupa, during the organogenesis of imaginal articles, the restoration power of excised articles is a specific property of tissues as ingrafting in last larval instar shows. The establishment of imaginal determinations is contemporaneous with the loss of the restoration power as is shown by ingrafting in a young larva. Ecology First Attempt at an Account of Energy Utilization of a Tropical Herbaceous Ecosystem (Lamto, Ivory-Coast): Primary Production and Animal Consumption, by Maxime Lamotte Primary production in the Lamto savannah reaches 114 x 106 kcal ha year,