Publications
| Title | Abstract | Year(sorted ascending) Filter | PMID Filter |
|---|
| formation of copulatory brushes in discoglossus pictus otth. under the action of testosterone propionate. | 1945 | 21023459 | |
| histological study of the microcallosities developed under the action of pregeninolone in discoglossus pictus otth. | 1945 | 21023436 | |
| masculinizing action of the ninolone pregnancy on the somatic sexual characteristics of discoglossus pictus otth. | 1945 | 21023435 | |
| variations in the action exerted by colchicine and chloral during the larval development of discoglossus pictus otth. | 1947 | 20258921 | |
| action of thiouracil on the metamorphosis of discoglossus pictus otth. | 1948 | 18880629 | |
| [cystic formation in thyroid gland of tadpoles of discoglossus pictus otth. treated with thiouracil]. | 1950 | 14811108 | |
| isolation of enteramine from extracts of posterior salivary glands of octopus vulgaris and of discoglossus pictus skin. | 1953 | 13034788 | |
| [demonstration of an acrosome secretion preceding fertilization in spermatozoa of the toad discoglossus pictus and the frog rana temporaria]. | 1955 | 13240886 | |
| [joint development in xenoplastic transplants between anuran and urodele amphibians; correlations between shoulder joint and girdle; incompatibility in transplants of triton cristatus in hyla arborea and on discoglossus pictus]. | 1956 | 13341315 | |
| distribution of protease activity in the blastula and early gastrula of discoglossus pictus. | 1957 | 13447905 | |
| [autoplastic transplantation of intermedial mesoderm in discoglossus pictus embroyo; development of the renal apparatus, of mesonephros and of the genital crests]. | 1958 | 13572635 | |
| [disappearance of 5-hydroxytryptamine from the granulations of the skin glands of discoglossus pictus and rana temporaria after injection of reserpine]. | 1958 | 13548128 | |
| [effects of ionic ratios of the environment on the growth & development of embryos of discoglossus pictus (otth) & rana temporaria (linné); preliminary observations]. | 1959 | 13671753 | |
| [histogenesis of the teeth and the horny beak of the larvae of discoglossus pictus otth]. | 1959 | 13816250 | |
| [xenoplastic transplantation of the caudal bud of urodela embryos on the limb region of anuran embryos (axolotl-discoglossus pictus)]. | 1959 | 13855773 | |
| [action of adrenaline on the consumption of oxygen in the discoglossus (discoglossus pictus otth)]. | 1961 | 13863368 | |
| [early ablation of the endoderm causes sterilization of the larva in discoglossidae (discoglossus pictus otth.)(anuran amphibian)]. | 1962 | 13898842 | |
| [demonstration of "germinal cytoplasm" in the egg and embryo of discoglossus: discoglossus pictus otth. (anurous amphibian)]. | 1962 | 13898841 | |
| [the value of the use of the sicilian frog "discoglossus pictus otth" in pregnancy diagnosis]. | 1962 | 13876732 | |
| [quantitative relations between light stimulus and contraction of the musculus sphincter pupillae of discoglossus pictus]. | 1963 | 14018163 | |
| [the telencephalon of discoglossus pictus (oth.). anatomical study in the tadpole and adult animal]. | 1963 | 14053284 | |
| [induction of triploidy by cold shock in discoglossus pictus otth]. | 1964 | 14199679 | |
| [the seminal vescicles in discoglossus pictus otth. development and histologic modifications following castration]. | 1964 | 14311391 | |
| [electrophoretic blood examinations in 2 species of anura tadpoles: discoglossus pictus (otth.) and alytes obstetricans (laur.). comparisons between controls and animals which received cutaneous heterografts]. | 1964 | 14262530 | |
| [the telencephalon of young discoglossus pictus tadpoles]. | 1965 | 5832373 | |
| [effects of ablation of the olfactory and optic rudiments on the nasolacrymal canal of discoglossus pictus otth]. | 1966 | 4224397 | |
| differentiation of aggregated embryonic cells of amphibians (discoglossus pictus). | 1967 | 5633191 | |
| [action of the mg++ ion on the distribution of the sexes in a population of tadpoles raised in a mineral solution in discoglossus pictus (otth)]. | 1967 | 4967606 | |
| [action of lactose on the distribution of the sexes in tadpoles of discoglossus pictus (otth.). increase of the number of males]. | 1967 | 4963405 | |
| regeneration of the testes in the clawed toad (discoglossus pictus otth.) after complete surgical removal. | 1967 | 6055905 | |
| [action of a posterior pituitary extract on the sex distribution of a tadpole population. discoglossus pictus, otth, raised in mineral solution]. | 1968 | 4972964 | |
| [amphisexual action of testosterone propionate under the influence of ionic concentration variations in discoglossus pictus, otth lizards raised in mineral solution]. | 1969 | 4976701 | |
| [respiration of discoglossus pictus (otth) tadpoles in the presence of saline varying in magnesium concentration]. | 1969 | 5807996 | |
| [action of mg++ ion on growth and development of discoglossus pictus (otth) tadpoles raised in mineral solution]. | 1969 | 5807995 | |
| phenomena of induction by the transverse neural fold during the formation of the mouth in discoglossus pictus. | 1969 | 5372856 | |
| [appearance of insular a cells in larval pancreas of an amphibia anoura: discoglossus pictus otth]. | 1970 | 4991037 | |
| [ionic determinism of sex formation, studied in an anourous batrachian: discoglossus pictus (otth), and in the animal kingdom]. | 1970 | 4248219 | |
| [sex in triploids of discoglossus pictus]. | 1971 | 5571384 | |
| [histochemical study of some lysosomal hydrolases of the intestinal epithelium during the development of the tadpole of discoglossus pictus otth, anuran amphibian. ii. electron microscopy study]. | 1971 | 5559570 | |
| [histochemical study of various lysosomal hydrolases of the intestinal epithelium during the development of the tadpole of discoglossus pictus otth, anuran amphibian. i. light microscopy study]. | 1971 | 5559569 | |
| [estimation of mg++ levels in the cellular fractions of tadpoles of discoglossus pictus (otth): influence of mgcl 2 concentration in the breeding media. study at several stages of development]. | 1971 | 5161026 | |
| effect of gastric peptides on acid and pepsin secretion in the frog discoglossus pictus. | 1971 | 4926699 | |
| [role of androgens in the anuran amphibian discoglossus pictus. i. in vitro metabolism of testosterone by the seminal vesicles]. | 1972 | 4405421 | |
| [androgenic effect on sex differentiation of immature testicular grafts in discoglossus pictus otth (anurous amphibian, discoglossidae)]. | 1972 | 4626017 | |
| [influence of magnesium concentration of the growth medium on the level of protein synthesis of microsomes isolated from discoglossus pictus tadpoles]. | 1972 | 4622879 | |
| sex in triploid discoglossus pictus. | 1972 | 4657699 | |
| properties in the neural crests in the formation of the pigmented pattern in discoglossus pictus. | 1972 | 4656932 | |
| [assay of the total acid phosphatase activity of intestinal homogenates from larvae of discoglossus pictus otth treated with thyroxine]. | 1972 | 4631955 | |
| [effect of mg 2+ ion on growth of tadpoles of discoglossus pictus (otth) and on the in vitro protein synthesizing capacity of their microsomes]. | 1973 | 4145452 | |
| [effects of treatment with potassium perchlorate on the development of the intestine in the larvae of discoglossus pictus otth]. | 1973 | 4123674 | |
| [active transport of sodium through seminal vesicles in the anuran discoglossus pictus]. | 1973 | 4197481 | |
| isoenzymes of lactic dehydrogenase in discoglossus pictus. electrophoretic pattern of the adult and variations observed in the course of embryonic development. | 1973 | 4789488 | |
| [partial characterization of a delta 4-3-ketosteroid-5-oxidoreductase in seminal vesicles of the anuran amphibian discoglossus pictus]. | 1973 | 4149250 | |
| [estradiol-17 receptors in the liver of chicken and the amphibian discoglossus pictus]. | 1973 | 4348321 | |
| [action of androgens in the anuran amphibian discoglossus pictus (otth). iii. effects of castration and action of androgens on the ultrastructure of the seminal vesicle]. | 1974 | 4430441 | |
| [measurement of several intestinal lysosomal hydrolase activities, through larval development of discoglossus pictus otth, anuran amphibian]. | the whole specific activities of 5 lysosomal enzymes (acid phosphatase, n-acetylβ-glucosaminidase,β-glucuronidase, cathepsin and aryl sulphatase) were measured in the guts of discoglossus tadpoles, before and during metamorphosis.for each hydrolase, the activities show the same variation pattern. they significantly increase at the end of prometamorphosis and the beginning of the climax, while there is histolysis of the first (primary) epithelium of the gut.the measured activities decrease at the ... | 1974 | 28304849 |
| [role of the dermis in differentiation of the nasolacrimal duct in discoglossus pictus (anourous amphibian)]. | 1974 | 4216416 | |
| [the in vitro formation of 5 alpha-dihydrotestosterone by the testis of discoglossus pictus]. | 1974 | 4152107 | |
| [in the near future will women be able to choose the sex of their children by following a diet?]. | the evidence for the author's hypothesis, that the sex ratio may be altered by the ionic environment during fertilization is presented. in the 1930's, it was discovered that the proportion of males increased as the ratio of potassium to calcium + magnesium ions increased for several marine species: an invertebrate bonellia viridis, aquarium fish aphyosemion microphtalmum, amphibian discoglossus pictus, dinophilus apatris, and some eels. these sex ratios cannot be affected by manipulating the ... | 1975 | 1136075 |
| properties of leucyl-trna synthetase from discoglossus pictus tadpoles. influence of mg-2+ ions on the enzymatic activity. | 1975 | 1139890 | |
| [development of the thalamus in anurans during metamorphosis (author's transl)]. | a developmental study of the anuran diencephalon from stage 30 to 2 months after metamorphosis has been done. at stage 30 in discoglossus pictus, the diencephalic wall is divided into a superior area and an inferior area, where two kinds of cellular migrations are described. comparison with the urodele diencephalon suggests that the building of a new area (area dorsolateralis) in anurans, by means of an 'external migration', characterizes a level of organization which is related to the optic sys ... | 1975 | 1176849 |
| [the pathways and primary visual centers of discoglossus pictus (amphibia, anura)]. | the retinal projections of discoglossus were examined on sixteen adult specimens uniterally deprived of retina. after a post-operative period of nine to one hundred and fifteen days, the degenerating fibers were stained with the fink-heimer and ebbesson-heimer techniques. the general scheme of primary optic pathways and centres is similar in discoglossus and rana. however, after a thorough study, some differences in distribution and density of degeneration suggest the idea that ranid's visual sy ... | 1975 | 816511 |
| [a new visual pathway in an anour amphibian, discoglossus pictus]. | the retino-tectai projections of the anura discoglossus pictus were examined on seventeen adult specimens unilaterally enucleated. after a postoperative survival period of 9 to 105 days, the degenerating fibers and terminals were shown by nauta and electromicroscopic techniques. this work points out the existence of a direct ipsilateral retino-tectal pathway in anura. typical terminal degenerations were seen in the postero-medial part of the ipsilateral tectum. the implications of this new anato ... | 1976 | 822954 |
| [differentiation in vitro of the nasolacrymal canal of discoglossus pictus otth (anuran amphibian)]. | the nasolacrymal duct of discoglossus pictus is able to differentiate in vitro from prometamorphosis, without thyroxine added to the culture medium if it is taken off late or with thyroxine added to the culture medium if it is taken off earlier (presumptive anlage). | 1976 | 816524 |
| evolution of lactate dehydrogenase isoenzymes in two types of skeletal muscles and skin tissue in discoglossus pictus (amphibia anura) during embryonic development. | 1976 | 1020629 | |
| diploid gynogenetics in discoglossus pictus. | 1976 | 1020626 | |
| aluminium localization in amphibian skin with the electron microprobe and ion microanalyzer. | emp and ima studies show the presence of a1 in the epidermis of larvae and young adults of discoglossus pictus and rana esculenta, which disappears during later stages of development. a1 is practically absent in the epidermis of xenopus laevis and pleurodeles waltlii. the localization of a1 with emp and ima supports the biochemical results. the function of a1 in the epidermis is not known at present. | 1976 | 1083571 |
| development of dorsal root iii afferent fibres in postmetamorphic juveniles of the frog discoglossus pictus. | 1977 | 333306 | |
| [architecture of the visual system of discoglossus pictus (oth)]. | the retinofugal pathways of an "archaic" anura discogossus pictus were examinated with fink-heimer method following ablation of the retina and after survival times of 5--105 days at 14 degrees c. a description of the diencephalic and mensencephalic architectonics has been done in order to replace the visual system into the general pattern. the scheme of primary optic pathways and centers is similar in discoglossus and rana. however, some retinofugal fibers reach the posterolateral part of the ip ... | 1977 | 305441 |
| [haploidy in discoglossus pictus]. | 1977 | 920032 | |
| eye lens development and gamma crystallins in discoglossus pictus (anura). | the ontogeny and localization of the gamma crystallins in discoglossus pictus lens development has been determined. using antibody specific for amphibian gamma crystallins in the immunofluorescence technique, it was found that gamma crystallins first appear in primary lens fibre cells in the lens rudiment, and continue to be restricted to the fibre area as lens development progresses. thus the role of gamma crystallins as indicators of a differentiated state remains constant in amphibian evoluti ... | 1977 | 330207 |
| effect of cutaneous stimulation on the development of misdirected wiping reflexes in skin-grafted discoglossus pictus. | the frog, discoglossus pictus, has been studied with respect to wiping reflex behavior developing after skin rotations performed at larval stages. misdirected wiping reflexes were obtained only from belly skin-grafts placed on the animals' back; back skin-grafts on the belly failed to elicit any misdirected limb movements in this species. we found that misdirected reflexes occurred more readily in 3-week and older animals if not subjected to any previous test experience, than in younger naive fr ... | 1977 | 326603 |
| [regeneration of the crystalline lens in amphibia anura during the post-embryonic stage i. experience with removal of the crystalline lens from larvae of discoglossus pictus]. | 1977 | 920029 | |
| ultrastructural and lectin binding changes during the formation of the animal dimple in oocytes of discoglossus pictus (anura). | 1977 | 590620 | |
| [electrophoretic pattern and activity of lactate dehydrogenase in discoglossus pictus (otth) and rana ridibunda (pallas) skeletal muscle and heart (author's transl)]. | the electrophoretic isozyme patterns, total and specific activity of lactate dehydrogenase on skeletal and cardiac muscles in discoglossus pictus and rana ridibunda have been studied. the isozymes were separated out in polyacrylamide gels. the ldh activity bands were developed selectively. the percentage of the h subunits are significantly higher in discoglossus than in rana, probably becuase rana is subjected to more severe anaerobic conditions during the hibernation time. | 1978 | 741060 |
| topography of cutaneous mechanoreceptive neurones in dorsal root ganglia of skin-grafted frogs. | 1. topographical distribution patterns of dorsal root ganglion (d.r.g.) cutaneous neurones providing innervation to various body surfaces were examined in doublypithed discoglossus pictus frogs.2. using electrophysiological methods, sensory neurones innervating back skin were observed to predominate on the dorsal ganglionic surfaces, while belly skin neurones were most prevalent in the caudal half of the d.r.g. ventral surfaces. flank neurones clustered in the medial half of d.r.g. ventral surfa ... | 1978 | 366106 |
| comparative metabolism of histamine in two amphibia anura. | the metabolism of histamine has been compared in rana ridibunda and discoglossus pictus, both amphibia anura. an intralymphatic injection of 14c-histamine (5 microci) was administered to the animals and the total radioactivity excreted in the urine was measured 24, 48, and 72 hours later. the metabolites excreted in the urine at 24 hours were analyzed by thin-layer chromatography and subsequent autoradiography. in both species approximately 60--70% of the injected dose was found in the urine by ... | 1979 | 517328 |
| temperature acclimation in amphibians: changes in lactate dehydrogenase activities and isoenzyme patterns in discoglossus pictus pictus (otth.) tadpoles. | 1979 | 547616 | |
| lactate dehydrogenase isoenzymes in discoglossus pictus: polymorphism of the m subunits and pattern of gene expression during ontogeny. | 1980 | 7331682 | |
| cyclic nucleotides in the amphibian discoglossus pictus during embryonic development. i. cyclic nucleotides determination. | 1980 | 6277124 | |
| origin and cytochemisty of the animal dimple granules in discoglossus pictus (anura) eggs. | at the centre of the animal hemisphere of the 1000 micron ovarian oocytes of discoglossus pictus there is the germinative area, a slightly depressed disc, 700 micron wide. during the passage of the oocyte through the oviduct this area becomes invaginated to form the 'animal dimple', which is the only site where successful sperm entrance can occur. granules (g) with a central electron-dense core and a peripheral portion containing sparse fibrous material are found in the peripheral cytoplasm of t ... | 1980 | 7400744 |
| peripheral reinnervation patterns and dorsal root ganglion topography in skin-grafted frogs: a behavioral and histological examination. | cutaneous respective fields for the first ventrolateral (vl1) and dorsomedial nerve trunks were mapped out behaviourally in normal and in skin-grafted discoglossus pictus frogs. ventrally directed wiping responses were obtained from stimulation of dorsally located belly skin grafts in all experimental animals. these misdirected responses were abolished completely by cutting either the dorsomedial nerve trunk or both the dorsomedial and the vl1 nerve trunks. the topography of cutaneous neurons of ... | 1981 | 7014177 |
| comparative acid phosphatase distribution in the suprarenal gland of discoglossus pictus, xenopus laevis and bufo bufo (anurans, amphibia). | acid phosphatase activity was found to have a similar distribution in the suprarenal glands of discoglossus pictus, xenopus laevis and bufo bufo (anurans, amphibia) as determined by light and electron histochemical localization. the enzymatic activity is localized in the lysosomes of both the interrenal cells and the chromaffin cells. it is, moreover, positive on the granule membranes of the adrenaline cells whereas it appears only occasionally on the granule membranes of the noradrenaline cells ... | 1981 | 6802124 |
| adrenaline-, noradrenaline- and small granule- containing cells in the adrenal gland of discoglossus pictus (amphibia, anura). | in the adrenal gland of discoglossus pictus, various types of chromaffin cells are described: noradrenaline cells, adrenaline cells and small granule-containing cells (on the basis of electron density and shape of the granules). the chromaffin cells occur in small groups, and have cytoplasmic processes which may surround them in the form of parallel layers. their nerve supply is sparse. the possible function of sgc-cells, in relation to those described in other vertebrates, is discussed. | 1982 | 7130056 |
| regional differences in the pattern of vitellogenesis in the painted frog discoglossus pictus. | during oocyte growth in the frog discoglossus pictus two patterns of vitellogenesis are described. the first one consists of the transformation of multivesicular bodies into yolk platelets; the second is the result of a typical endocytotic process, as described in other species. the peculiarity in discoglossus vitellogenesis consists of a regional difference of these features of vitellogenesis in vitellogenic oocytes: the multivesicular bodies transforming into yolk platelets are found only in t ... | 1982 | 7170708 |
| immunolocalization of alpha-actinin in an amphibian egg (discoglossus pictus). | 1982 | 6750634 | |
| a histological and dynamic study of the gastric region of discoglossus pictus larvae, cultured with or without thyroxine. | the organotypic culture of the gastric region is carried out on premetamorphic discoglossus pictus larvae. adding thyroxine to the culture medium provokes various transformations. on the cytological level, the reactions observed, which are variable depending on the cell category concerned, can be divided into two types of phenomena: histolytic and histogenetic. autophagia linked to lysosome intervention is frequently found among the histolytic processes. autophagic vacuoles and residual bodies a ... | 1983 | 6842159 |
| physiological and biochemical properties and population studies in the m lactate dehydrogenase polymorphism of discoglossus pictus (amphibia, anura). | 1. m ldh polymorphism has been previously described in discoglossus pictus. 2. gene frequency at the ldm locus varied significantly in two isolated areas which differed markedly in water oxygen tension. 3. sex distribution, relative activity of the ldh isozymes, percentage of total h and m subunits and enzyme kinetics did not differ among the distinct ldh phenotypes. 4. under decreasing oxygen conditions, mean time to death, lt50 and oxygen consumption were similar in tadpoles of the three ldh p ... | 1983 | 6839720 |
| [experimental anatomic study of the topography of the retinofugal projections in discoglossus pictus (amphibia, anura). ii. the tectum: existence of a double-system of primary optic projections]. | the possibility of retinotopic organization of bilateral retinotectal projection was studied by fotal retinal lesions followed by the fink-heimer technique. this work in discoglossus pictus (amphibia, anura) shows two types of direct visual projections: a contralateral projection within the tectal layer 9 and a bilateral projection on tectal layer f of potter (1969). the ipsilateral projection within tectal layer 9, earlier described after enucleation (picouet et clairambault, 1977), is not obse ... | 1983 | 6672097 |
| [experimental anatomic study of the topography of the retinofugal projections in discoglossus pictus (amphibia, anura). i. the thalamus: re-examination of the contralateral retinotopy and the origin of the uncrossed optic fibers]. | the topography of retinofugal projections on the thalamus of an anuran amphibia was studied by fink-heimer technique. after small lesions in retina, degeneration was found in all contralateral neuropils and in one or several ipsilateral neuropils according to retinal location: a lesion in temporal retina is followed by large axonal degeneration in neuropil of bellonci; a dorsal lesion invaded whole geniculate neuropil while within it, contralateral ventral and nasal projections are scarce. ipsil ... | 1983 | 6672092 |
| effects of prolactin and bromocriptine in discoglossus pictus (anuran amphibian. otth) tadpoles. | 1. the results obtained by ovine prolactin administration during the larval development of discoglossus pictus (ott) suggests that prolactin-like hormone is the "larval factor" necessary for growth and for maintaining the larval aquatic features. 2. bromocriptine treatment during the larval development of d. pictus has contrary effect on growth and larval structures. 3. prolactin administration does not inhibit but delays metamorphosis. 4. when bromocriptine is added at late stages of the develo ... | 1983 | 6132721 |
| globin evolution in some species of the genus bufo. | the globins of 10 species of toads of the genus bufo have been analysed. from the values of the reciprocal rates between their amino acid residues a 'dissimilarity matrix' was made. in this have been included the values related to discoglossus pictus and xenopus laevis. the numerical data, derived from a computer program, gave a dendrogram representing the evolution of the analysed globins. this appears correlated to the geographical distribution and to the metabolic adaptation of the correspond ... | 1984 | 6744827 |
| catalase enzymatic activity and electrophoretic patterns in adult amphibians--a comparative study. | catalase electrophoretic patterns and enzymatic activities were measured in four organs of two anuran species, rana ridibunda perezii and discoglossus pictus. the d. pictus enzyme appeared as two distinguishable bands, whereas r. ridibunda catalase was monomorphic. electrophoretic mobility of the major d. pictus catalase band was greater than that of r. ridibunda. enzymes from both species showed slower mobility than that from bovine liver. catalase activities did not show significant difference ... | 1985 | 3995926 |
| [ultrastructural aspects of the amphibian heart (discoglossus pictus pictus)]. | 1985 | 4074529 | |
| the cortical endoplasmic reticulum and its possible role in activation of discoglossus pictis (anura) eggs. | the role of endoplasmic reticulum was investigated in the egg of discoglossus pictus; recent findings suggest that this organelle is the source of ca2+ sequestration and release at activation. in the egg of discoglossus the dimple is the only site where sperm-egg fusion occurs. microvilli containing microfilament bundles penetrate into the dimple cytoplasm and thus define a cortical layer containing cortical granules, tubular cisternae 35 nm thick and vacuoles. in the underlying cytoplasm are cl ... | 1986 | 3825679 |
| the role of glycosaminoglycans in anuran pigment cell migration. | the migratory pathways of neural crest-derived pigment cells were examined in two anurans, xenopus laevis and discoglossus pictus, and correlated with the distribution of glycosaminoglycans (gag) in the extracellular matrix (ecm) of these pathways. in xenopus, melanophores in the trunk reach the dermis by initially migrating ventrally, between the neural tube and somites, and then by migrating through the somites to reach the subectodermal space. in discoglossus, melanophores, iridophores, and x ... | 1986 | 3723060 |
| different levels of hyperoxia reversibly induce catalase activity in amphibian tadpoles. | studies about the proposed antioxidant physiological role of the catalase (cat) enzyme in relation to different environmental oxygen tensions are reported for the first time in amphibian larvae of discoglossus pictus and rana ridibunda perezi during their development. the cat levels of whole tadpoles increased constantly in both species during the larval period, reaching a maximum during the metamorphic climax. all through development, cat activity levels were always greater in d. pictus than in ... | 1987 | 3666517 |
| comparative data on acetylcholinesterase cytochemistry in various chromaffin cell types of discoglossus pictus (amphibia, anura). | the cytochemical localization of acetylcholinesterase (ache) activity was studied in the adrenal chromaffin cells of discoglossus pictus. reaction end-products were associated with all types of chromaffin cells, i.e. adrenaline (a), noradrenaline (n) and small granule chromaffin (sgc-a, sgc-n) cells, and nervous elements present in the gland. the sgc-a and sgc-n showed the same intensity of ache reaction in a and n cells, respectively. on the whole, the a and sgc-a cells were more reactive than ... | 1987 | 2443117 |
| a highly localized activation current yet widespread intracellular calcium increase in the egg of the frog, discoglossus pictus. | sperm entry in the egg of the painted frog, discoglossus pictus, occurs only at a specialized region of the animal hemisphere called the animal dimple, a structure not found in other species of frog. an extracellular vibrating electrode was used to measure the activation current to determine if the ion channels that open to generate the fertilization potential are localized in this region. eggs that were activated by microinjecting inositol-1,4,5-trisphosphate (ins(1,4,5)p3) exhibited activation ... | 1988 | 2460387 |
| oxygen regulation capacity in discoglossus pictus tadpoles between moderate hyperoxia and acute hypoxia in water. | the oxygen dependence of aquatic oxygen consumption was measured in active and anesthetized stage xviii discoglossus pictus tadpoles (amphibia, anura). the active tadpoles are good oxygen regulators in moderate hyperoxia and moderate hypoxia, whereas they are oxygen conformers in acute hypoxia. critical oxygen pressure was 52 mmhg o2. anesthetizing the larvae changes them to perfect oxygen conformers between moderate hyperoxia and moderate hypoxia (249-63 mmhg o2). at stage xviii the aquatic res ... | 1988 | 3231886 |