Publications
| Title | Abstract | Year(sorted descending) Filter | PMID Filter |
|---|
| studies on the formation and state of determination of the trunk organizer in the newt,cynops pyrrhogaster. | the exact localization of the presumptive trunk organizer was determined by means of vital staining at the initiation of gastrulation (0 h embryo) and subsequently in 6, 9, 12 and 24 h embryos.the progressive changes in the self-differentiation and inductive capacity of the trunk organizer were studied in isolation cultures (sitting drop) and in sandwich cultures with competent gastrula ectoderm. in the 0 and 6 h embryo cultures the excised trunk organizer predominantly formed atypical ectoderm. ... | 1979 | 28304918 |
| the effect of aging on the neural competence of the presumptive ectoderm and the effect of aged ectoderm on the differentiation of the trunk organizer incynops pyrrhogaster. | the effect of aging on the neural competence of the presumptive ectoderm of the early gastrula, and the effect of aged ectoderm on the differentiation of the still uninvaginated dorsal blastoporal lip at the small yolk-plug stage - representing the trunk organizer - were examined by the sandwich method incynops pyrrhogaster.the presumptive ectoderm to be used as reaction system was taken from 0 to 36 h exogastrulae obtained by operation at the early gastrula stage and combined with trunk organiz ... | 1979 | 28304917 |
| effect of starvation & hypophysectomy on amino acid levels of ovaries of triturus pyrrhogaster laur. | 1978 | 700806 | |
| [phylogenetic studies on some japanese amphibia by means of immunoelectrophoresis. ii. relationships of some amphibians to japanese pond frogs (author's transl)]. | since the japanese pond frogs (rana nigromaculata and r. brevipoda) are known to be very closely allied with each other in morphological, ecological, physiological or immunological characters, the phylogenetical relationships between the japanese pond frogs and other 10 species of japanese amphibians were investigated by means of immunoelectrophoretic analysis of liver extract. the results obtained are as follows: (1) there are conservative antigens which are commonly found in all species of anu ... | 1978 | 631194 |
| on the vascular architecture of the carotid labyrinth in cynops pyrrhogaster and onychoactylus japonicus. | the fine vascular arrangement of the carotid labyrinth in two species of urodeles, cynops pyrrhogaster and onychodactylus japonicus was investigated. india ink-gelatin injected preparations were examined under the dissecting microscope. resin casts of the blood vessels prepared using the method of murakami (1971) were observed in the scanning electron microscope. in both species, the common carotid artery terminated in the central chamber from which arose two retia mirabilia, i.e. an external ca ... | 1977 | 597008 |
| axon regeneration across the site of injury in the optic nerve of the newt triturus pyrrhogaster. | the process by which axons regenerate following a freeze injury to the optic nerve of the newt was analyzed by light and electron microscopy. freezing destroys cellular constituents in a one millimeter segment of the nerve, leaving intact the basal lamina and the blood supply to the eye. no axons are seen at the site of injury one to seven days post lesion. this contrasts with the persistence of normal-appearing but severed unmyelinated axons within the cranial stump which thus give a false appe ... | 1977 | 862013 |
| electron microscopic stldy of the developing lateral-line organ in the embryo of the newt, triturus pyrrhogaster. | the morphological sequence of events occurring in the development of the lateral-line organ was investigated in the embryo of the newt, triturus pyrrhogaster, by means of electron microscopy. six stages of development have been defined for convenience of description. the primordium of the lateral-line organ migrating from the pre- and post-auditory placodes is segmented into a small cell mass accompanied by a few schwann cells enveloping nerve fibers. in the clump of cells of the lateral-line pr ... | 1976 | 1008255 |
| movement of the cell surface and change in surface area during cleavage in the newt's egg. | in cleaving eggs of the newt, cynops pyrrhogaster, the behaviour of the egg surface was analysed by observing linear and area changes in a transplanted piece of cortex which differed in pigmentation from the background. results from the animal hemisphere showed that the surface in the cleavage plane shrank extensively in the region where the early cleavage furrow was being formed. on both sides of the cleavage plane, the surface began to shrink in a direction parallel to the cleavage furrow and ... | 1976 | 987048 |
| the relationship of a specific chromosomal region to the development of the acrosome. | in early spermatids of urodeles the chromosome segments bearing constitutive heterochromatin are localized in one half of the round nucleus; this region becomes the basal part of the long nucleus of the spermatozoon. the euchromatic chromosome segments extend toward the anterior nuclear pole in a bouquet configuration (macgregor and walker, 1973). in the course of spermiohistogenesis, one of the heterochromatic regions (the acrosomal chromocenter) migrates from the basal part to the anterior hal ... | 1976 | 949922 |
| cytological and microspectrophotometric analysis of mesodermalized explants of triturus gastrula ectoderm. | using isolated presumptive ectoderm of the newt (triturus pyrrhogaster) embryos as a reactor and extract of rat bone marrow as a mesodermal inductor, changes of cell number and mitotic index of the reactor cells were studied. in early stages of cultivation the increase in cell number in the mesodermalized ectodermal piece was slower than in the non-mesodermalized epidermal piece; but after 24 h it showed abrupt increase and reached a cell population equal to that of the control at 48 h of cultiv ... | 1976 | 978130 |
| architecture of the marrow vasculature in three amphibian species and its significance in hematopoietic development. | architecture of the bone marrow vasculature, particularly that of the femur, was analyzed in three amphibian species in relation to the early phylogeny of marrow hematopoiesis. a dye-injection method and histological techniques, including both serial sectioning and reconstruction methods, were used for this purpose. from these observations the following conclusions may be drawn. (1) marrow hematopoiesis is absent from the femur of the urodelan (triturus pyrrhogaster) and appears first in the fem ... | 1976 | 1083670 |
| [phylogenetic studies on some japanese amphibia by mean of immunoelectrophoresis. i. relationships of some frogs and newt to toad (author's transl)]. | the phylogenetic relationship among toad, frogs and newt from japan was investigated by means of immunoelectrophoresis. homologous, heterologous and non-identity reactions between rabbit anti-bufo bufo antiserum and antigen from each of 13 species and 2 subspecies of japanese amphibia were examined. the number and positions of arcs appeared in these reactions were compared. the relationship observed in the comparison well coincided with the classification of the upper taxa of amphibia; viz 1) hy ... | 1975 | 808417 |
| studies on the gastrulation of amphibian embryos: light and electron microscopic observation of a urodele cynops pyrrhogaster. | the course of gastrulation in embryos of a urodele, cynops pyrrhogaster, was studied with 1 mum epon sections and transmission and scanning electron microscopy. during the initial period of gastrulation, the bottle cells and a groove are formed in the dorsal part. the outer ends of the bottle cells have many microvilli, an electron-dense layer and many small vesicles. microtubules are present parallel to the long axis of the bottle cells, and a yolk-platelet-free region is observed at the inner ... | 1975 | 1214113 |
| [neural control of the terminal of the hindgut of triturus pyrrhogaster]. | 1974 | 4477310 | |
| wave of stiffness propagating along the surface of the newt egg during cleavage. | in the eggs of the newt, cynops (triturus) pyrrhogaster, change in stiffness of the cortex was measured in various regions at the time of the cleavage. measurements were performed by mitchison and swann's cell elastimeter method with a modification, in which two fine pipettes were attached to the surface of one egg at the same time, in order to compare the rigidity of two regions. the stiffness of the cortex changed very little before the start of the first cleavage. however, just before the app ... | 1974 | 4809240 |
| self-differentiation of the heart rudiment of the newt (cynops pyrrhogaster). | 1973 | 4797323 | |
| electron microscopic study on the parathyroid gland of the parathormone-injected newt, triturus pyrrhogaster (boie). | 1973 | 4740812 | |
| spontaneous epidermal tumor in an adult newt, cynops pyrrhogaster. | 1973 | 4689907 | |
| merits of the japanese newt, cynops pyrrhogaster pyrrhogaster, as an experimental animal, especially for the study of transplantation immunity. | 1973 | 4609273 | |
| effects of growth hormone and nutrient on limb regeneration in hypophysectomized adult newts. | the effect of hypophysectomy, growth hormone (gh) and an amino acid-glucose mixture on the regenerative ability of the hypophysectomized triturus pyrrhogaster yielded the following results: 1 the survival time of hypophysectomized newts can be prolonged substantially by the sulfamide application. 2 although the limb regeneration in the hypophysectomized newt is retarded as compared with that of the pituitary intact control, it finally completes morphogenetic process under such conditions of prol ... | 1973 | 30332863 |
| origin of histones, and relation between nuclear histones and cytoplasmic basic proteins in early development of japanese newt, triturus pyrrhogaster. | 1972 | 5037000 | |
| monoamine oxidase in the neurohypophysis of the newt (cynops pyrrhogaster pyrrhogaster), the toad (bufo bufo japonicus) and the tortoise (clemmys japonica). | 1972 | 4623962 | |
| electrical coupling between fat cells in newt fat body and mouse brown fat. | white fat from the newt, triturus pyrrhogaster, fat body, and brown fat from the interscapular fat pad of newborn mice have been tested for the presence of low-resistance intercellular junctions. 42 pairs of amphibian fat cells and 15 pairs of mammalian brown fat cells were found to be "electrically coupled." in most of these cases intracellular deposition of a dye, niagara sky blue: 6b, was used to supplement and confirm direct observations of impalements. coupling was often difficult to find i ... | 1971 | 4938627 |
| ultrastructural change in the parathyroid gland of the phosphate treated newt, triturus pyrrhogaster (boié). | 1971 | 5168592 | |
| [the electron microscopic study on the functional area of the digestive epithelial cell membrane in newt, triturus pyrrhogaster]. | 1971 | 5290269 | |
| a nephroblastoma in a fire-bellied newt, cynops pyrrhogaster. | 1970 | 4321086 | |
| regional histone changes in embryos of the newt, triturus pyrrhogaster, during early development. | 1970 | 5459824 | |
| ultrasturcture of the parathyroid gland of the newt, triturus pyrrhogaster (boié) in the spring season. | 1970 | 5468683 | |
| electron microscopic study on the parathyroid gland of the newt triturus pyrrhogaster (boié) in natural hibernation. | 1970 | 5442608 | |
| experiments on a spontaneously orginated visceral tumor in the newt, triturus pyrrhogaster. | 1970 | 5278142 | |
| lymphosarcomatous disease of the newt, triturus pyrrhogaster. | 1970 | 5538539 | |
| cultivation in vitro of the testis cord of the newt, triturus pyrrhogaster. | 1969 | 5392793 | |
| behaviour of histones and cytoplasmic basic proteins during embryogenesis of the japanese newt, triturus pyrrhogaster. | 1969 | 5408616 | |
| alkaline phosphatase activity in the regenerating limb of the adult newt triturus pyrrhogaster. | 1969 | 5384492 | |
| are the parathyroid glands necessary to the life of the newt, cynops pyrrhogaster? | 1969 | 5395934 | |
| an electron microscopic study on the guanophore in the iris of the newt, triturus pyrrhogaster (boié). | 1969 | 5395640 | |
| the mast cells in the brain of the triturus pyrrhogaster (boie). i. the histologic studies. | 1968 | 4181658 | |
| mast cells and histamine in a newt, triturus pyrrhogaster boié. | 1968 | 5711878 | |
| histochemical and electrophoretic studies of esterase in the regenerating forelimb of the adult newt, triturus pyrrhogaster. | 1967 | 6075515 | |
| in vitro analyses of wolffian lens regeneration: differentiation of the regenerating lens rudiment of the newt, triturus pyrrhogaster. | 1967 | 6075514 | |
| differentiation capacity of the marginal zone in the morula and blastula of triturus pyrrhogaster. | 1967 | 6075513 | |
| electron microscopic examination of the sites of nuclear rna synthesis during amphibian embryogenesis. | the site of h(3)-uridine incorporation and the fate of labeled rna during early embryo-genesis of the newt triturus pyrrhogaster were studied with electron microscopic autoradiography. isolated ectodermal and mesodermal tissues from the embryos were treated in h(3)-uridine for 3 hours and cultured in cold solution for various periods before fixation with oso(4) and embedding in epon. at the blastula stage, the only structural component of the nucleus seen in electron micrographs is a mass of chr ... | 1965 | 19866688 |
| restitution of the eye from the iris after removal of the retina and lens together with the eye-coats in the newt, triturus pyrrhogaster. | 1965 | 14346508 | |
| an observation of the mast cell, especially the dendrite-type tissue mast cell in triturus pyrrhogaster (boie). | 1965 | 14289867 | |
| the origin of the luteinizing hormone-releasing hormone (lhrh) neurons in newts (cynops pyrrhogaster): the effect of olfactory placode ablation. | neurons containing luteinizing hormone-releasing hormone (lhrh) are first detected in newt embryos (cynops pyrrhogaster) in the olfactory epithelium and ventromedial portion of the olfactory nerve, after which they sequentially appear in the intracerebral course of the terminal nerve at prometamorphosis, and in the septo-preoptic area at postmetamorphosis. in adults, however, lhrh-immunoreactive cells are rarely seen in the nasal region, and their distribution shifts into the brain, suggesting t ... | 1965 | 1423481 |
| strontium and calcium reabsorption in renal tubules of the newt, triturus pyrrhogaster. | reabsorption of calcium in the proximal tubule cannulated in vivo exceeded reabsorption of strontium. the diuretics diamox and salyrgan depressed the reabsorption of calcium but not strontium. | 1964 | 14107462 |
| transmissibility and some histopathology of a spontaneously originated visceral tumor in the newt, triturus pyrrhogaster. | 1963 | 14098909 | |
| the fine structure of tissue mast cells in triturus pyrrhogaster (boie). | 1963 | 14046091 | |
| studies on amphibian yolk 1. the ultrastructure of the yolk platelet. | the yolk platelets of mature eggs and young embryonic cells of all amphibian species studied (rana pipiens, triturus pyrrhogaster, diemictylus viridescens, rana nigromaculata, and bufo vulgaris) have a superficial layer of fine particles or fibrils (ca. 50 a in diameter), a central main body with a crystalline lattice structure, and an enclosing membrane approximately 70 a in thickness. electron micrographs of the main body reveal hexagonal net (spacing ca. 70 a), square net (spacing ca. 80 a), ... | 1963 | 13962448 |
| influence of ovarian extract upon the sex differentiation of terminal crest in the testis of triturus pyrrhogaster (boie). | 1961 | 13904272 | |
| [membrane potential in kidney tubules of triturus pyrrhogaster]. | 1961 | 14496151 | |
| on the commissura postoptica in the brain of a newt, triturus pyrrhogaster. | 1955 | 13297330 | |
| cytological observations on the epithelium of the gallbladder in urodele amphibian triturus pyrrhogaster. | 1954 | 14356692 | |
| ribonucleic acid and protein in the growing oocytes of triturus pyrrhogaster. | 1953 | 13076194 | |
| the effect of x-rays on chromosomes and nucleoli in ovarian eggs of the salamander, triturus pyrrhogaster. | 1947 | 20268160 |