| the ultrastructure of wallerian degeneration in the severed optic nerve of the newt (triturus viridescens). | wallerian degeneration in the severed newt's (triturus viridescens) optic nerve is complete between the 10-14th post operative day (p.o.d.). consequently, the newt optic nerve displays one of the most rapid degenerative responses yet reported for the central nervous system of vertebrates. in most cases it also exhibits the speed of degenerative phenomenon in the vertebrate peripheral nervous system. the degeneration of unmyelinated axons is most rapid and is completed by 2-3 p.o.d., compared to ... | 1975 | 1115356 |
| the role of a normal lens in wolffian lens regeneration. | the mid-ventral third of the iris was excised from 61 adult notophthalmus viridescens hosts, and the mid-dorsal third of the iris from donor eyes was implanted in its place. after the iris healed and the host lens was removed, two lens regenerates developed, one from the host and one from the transplanted iris. the host regenerate was removed 53-91 days after the first lentectomy. animals were sacrificed 1-40 days after the second lentectomy. a lens developed from the host dorsal iris in the pre ... | 1975 | 1113070 |
| the effect of dimethyl sulfoxide on forelimb regeneration of the adult newt, triturus viridescens. | | 1975 | 1055546 |
| dna synthesis in the thymus of the adult newt notophthalmus viridescens. | lymphocytic activity was examined in thymuses of adult newts by studying the number, location, morphology and fate of cells within thymuses which had been processed for autoradiography 15 min, 2 and 4 h, and 2, 4, and 10 days subsequent to the injection of tritiated thymidine. results of this study indicate (1) that the adult thymus is a highly proliferative organ, (2) that large and medium-sized lymphocytes present in the peripheral parenchyma give rise to smaller lymphocytes which move central ... | 1975 | 1163206 |
| cyclic amp and neuroendocrine influence upon forelimb regeneration in the adult newt, notophthalmus viridescens. | the influence of the nervous and endocrine systems upon successive stages of limb regeneration suggest possible neuroendocrine interaction(s). intraperitoneal injections of various agents had no effects upon blastema formation. chlorpromazine, administered alone or with hormones, retarded morphogenesis. prolactin, dibutyryl camp (db-camp), theophylline, and acetylcholine accelerated morphogenesis. 5'-amp had no effect. only db-camp countered the chlorpromazine-induced retardation of morphogenesi ... | 1975 | 3753 |
| denervation-induced changes in soluble protein content during forelimb regeneration in the adult newt, notophthalmus viridescens. | | 1974 | 4436637 |
| irradiated cells and blastema formation in the adult newt, notophthalmus viridescens. | | 1974 | 4618566 |
| failure of synthetic trf to elicit metamorphosis in frog tadpoles or red-spotted newts. | | 1974 | 4216521 |
| an electron microscopic study of the newt (triturus viridescens) optic nerve. | | 1974 | 4836654 |
| influence of hypophysectomy and starvation on blood glucose levels in the newt, notophthalmus viridescens. | | 1974 | 4836193 |
| regneration of the ureter and repair of the oviduct in the adult newt notophthalmus viridescens. | | 1974 | 4824764 |
| a partial characterization of collagens from notophthalmus viridescens and rana catesbiana. | | 1974 | 4548869 |
| the regulative ability of the limb regeneration blastema ofnotophlhalmus viridescens: experimentsin situ. | 1. the regulative ability of the regeneration blastema of the newt limb (notophthalmus viridescens) was tested by operationsin situ. either the anterior, posterior, dorsal, or ventral half of the blastema was removed at various stages during regeneration. 2. all blastemas operated on prior to the stage of four early digits showed a delay in reaching the subsequent stages of regeneration. 3. the blastema is capable of extensive regulation in the anterior-posterior and dorsoventral axes even after ... | 1974 | 28304737 |
| retardation of progressive forelimb regeneration by treatment with neuropharmacological agents. | intraperitoneal administration of hormones or of certain neuropharmacological agentsdoes not affect initial blastema formation in adult newts (notophthalmus viridescens). hormonal treatment accelerates the onset of the morphogenetic phase of regeneration. in contrast, treatment with chlorpromazine (alone or with growth hormone), guanethidine, or atropine retards or represses the onset of morphogenesis. these results suggest that some interaction between the nervous and endocrine systems is requi ... | 1974 | 4462063 |
| prolactin-releasing effects of centrally-acting drugs in the red-spotted newt, notophthalmus viridescens. | | 1974 | 4415330 |
| forelimb regeneration from different levels of amputation in the newt,notophthalmus viridescens: length, rate, and stages. | 1. some aspects of the influence of position on regeneration have been examined by comparing regeneration from two different levels along the newt forelimb. 2. we have defined a series of stages of forelimb regeneration in the newt,notophthalmus viridescens, in order to facilitate this study. 3. limbs amputated at either a proximal level (through the humerus) or a distal level (through the radius and ulna) pass through the same stages at the same times after amputation. 4. the histological seque ... | 1973 | 28304797 |
| developmental cytology of chromatophores in the red-spotted newt. | | 1973 | 4741500 |
| prolactin and thyroid hormone interactions in salt and water balance in the newt notophthalmus viridescens. | | 1973 | 4715232 |
| relations of prolactin and thyroid hormone to molting, skin texture, and cutaneous secretion in the red-spotted newt. | | 1973 | 4708140 |
| an analysis of urodelian retinal regeneration. ii. ultrastructural features of retinal regeneration in notophthalmus viridescens. | | 1973 | 4122236 |
| the influence of temperature on lens regeneration in the adult newt, triturus viridescens. | | 1973 | 4700430 |
| effects of hypothalamic extirpations on thyroidal and intermedinal activity in the red spotted newt. | | 1973 | 4632030 |
| cell surface changes during dedifferentiation in the metaplastic transformation of iris into lens. | changes at the cell periphery during the dedifferentiative phase of the metaplastic transformation of iris into lens have been studied in notophthalmus viridescens and taricha granulosa using cell electrophoresis. cell surface charge density increases as early as 1-3 days after lens removal. cells of regenerates at 10-15 days after lentectomy have significantly lower electrophoretic mobilities than those of the irises of nonlentectomized newts. decrease in surface charge density is due, at least ... | 1972 | 4653413 |
| chromosomal localization of repetitive dna in the newt, triturus. | the repetitive dna sequences of the newt, triturus viridescens, have been studied by nucleic acid hybridization procedures. complementary rna was synthesized enzymatically from unfractionated newt dna. this rna hybridized strongly to the centromeric regions of both somatic and lampbrush chromosomes it also bound to other loci scattered along the lengths of the chromosomes the amplified ribosomal dna in the multiple oocyte nucleoli was demonstrated by in situ hybridization | 1972 | 5065184 |
| neural control of rna synthesis in regenerating limbs of the adult newttriturus viridescens. | polyacrylamide gel electrophoresis was used to investigate the role of nerves in controlling patterns of rna synthesis in regenerating limbs of the adult newt,triturus viridescens. denervation has the same effect on nerve-dependent and independent stages of regeneration, reducing by approximately 40-50% the synthesis of ribosomal and transfer rna. although a differential qualitative response of messenger rna synthesis to denervation between nerve-dependent and independent stages has not been rul ... | 1972 | 28304573 |
| light and electron microscopic radioautography of glucose-6-h 3 incorporation in the retina of the adult newt, triturus viridescens dorsalis. | | 1972 | 5016503 |
| effects of x-irradiation on lens regeneration in adult triturus viridescens. | | 1972 | 5007371 |
| leech-repellent property of eastern red-spotted newts, notophthalmus viridescens. | eastern red-spotted newts (notophthalmus viridescens, salamandridae) are rarely attacked by leeches. this protection is not shared by related salamandrids or by ambystoma (ambystomatidae). tetrodotoxin is not the repelent. the immunity of notophthalmus to leech parasitism is probably most significant in its aquatic stages, although the terrestrial efts are also protected. | 1971 | 17779402 |
| corticosterone phases a circadian water-drive response to prolactin in the spotted newt, notopthalmus viridescens. | | 1971 | 5158519 |
| comparative morphology of the neurohypophysis of the three life stages of the central newt (notophthalmus viridescens louisianensis). | | 1971 | 4106216 |
| experimental study of mimicry in salamanders involving notophthalmus viridescens viridescens and pseudotriton ruber schencki. | | 1971 | 16063321 |
| growth and metabolic effects of prolactin and growth hormone in the red-spotted newt, notophthalmus viridescens. | | 1971 | 5094236 |
| the fine structure of the retina in the newt, triturus viridescens. | | 1971 | 5096130 |
| patterns of rna synthesis in regenerating limbs of the adult newt, triturus viridescens. | | 1971 | 5120632 |
| the ultrastructure of the spermatheca in the red spotted newt. | | 1970 | 5522108 |
| development of the neuromuscular junction : ii. cytological and cytochemical studies on the neuromuscular junction of dedifferentiating muscle in the regenerating limb of the newt triturus. | following amputation of the limb of the newt, triturus viridescens, muscle fibers dedifferentiate giving rise to mesenchymal cells. the earliest changes detected in neuromuscular junctions of dedifferentiating muscle fibers are the appearance of a few vacuoles and decrease in density of the terminal axoplasm. later, synaptic vesicles become tightly clustered in the axon termination, and their content appears denser than normal. then, vesicles diminish in number until few are seen in the ending. ... | 1970 | 19866741 |
| melanogenesis in amphibians. ii. electron microscope studies of the normal and ptu-treated pigmented epithelium of developing notophthalmus viridescens eyes. | | 1970 | 5491992 |
| the collagenolytic enzyme of the regenerating limb of the newt triturus viridescens. | | 1970 | 4316358 |
| survival and functioning of autoplastic, homoplastic and xenoplastic pituitary grafts in the red-spotted newt. | | 1970 | 4910141 |
| responses to thiourea and to surgical thyroidectomy by the autotransplanted pituitary gland in the red spotted newt. | | 1970 | 5435507 |
| incorporation of 35s-sulfate into the oviducts and egg jelly of the newt, notophthalmus viridescens. | | 1970 | 5448186 |
| the influence of the nerve on lower jaw regeneration in the adult newt, triturus viridescens. | | 1969 | 5353235 |
| neurotrophic dependence of the lateral-line sensory organs of the newt, triturus viridescens. | | 1969 | 4900218 |
| electron microscopy of the normal and i-131 treated thyroid gland of the newt, notophthalmus viridescens. | | 1969 | 5798187 |
| re-establishment of forelimb regeneration in adult hypophysectomized diemictylus (triturus) viridescens given frog anterior pituitary extract. | | 1969 | 5804914 |
| analysis of histogenesis and regenerative ability of denervated forelimb regenerates of triturus viridescens. | | 1969 | 5804911 |
| fine structure of the autotransplanted pituitary in the red eft, notophthalmus viridescens. | | 1969 | 5765437 |
| the neuroglia in the spinal cord of the newt, triturus viridescens. | | 1969 | 5780525 |
| polymorphic control of subunit synthesis for the enzyme lactate dehydrogenase in the newt, triturus viridescens. | | 1968 | 5752048 |
| collagenolytic activity in regenerating forelimbs of the adult newt (triturus viridescens). | | 1968 | 4298061 |
| sialic acid in egg capsules and oviducts of the newt, notophthalmus viridescens. | | 1968 | 5689602 |
| ribonucleoprotein particles in the amphibian oocyte nucleus. possible intermediates in ribosome synthesis. | studies of the sedimentation properties of rnp(1) material from the nucleus of the amphibian oocyte have indicated (1) that there are few, if any, 78s ribosomes in the nucleus, (2) that there are smaller particles sedimenting at 50-55s and 30s, and (3) that the larger of these is the precursor of the 60s subunit of the cytoplasmic ribosomes. although the nature of the 30s material is not completely clear, it probably includes precursor particles to the 40s ribosomal subunit. heavy (50-55s) parti ... | 1968 | 5645543 |
| an autoradiographic evaluation of the cell reproduction cycle in the newt, triturus viridescens. | | 1968 | 5688433 |
| nerve penetration and regeneration after xrayed limbs of triturus viridescens were covered with unxrayed epidermis. | | 1967 | 4870954 |
| studies on the mechanism of implant-induced supernumerary limb formation in urodeles. i. the histology of supernumerary limb formation in the adult newt, triturus viridescens. | | 1967 | 5340568 |
| the relationship between rna synthesis and hemoglobin synthesis in amphibian erythropoiesis : cytochemical evidence. | a cytochemical study of the relationship between rna synthesis and hemoglobin synthesis has been performed on splenectomized newts, triturus viridescens. employing radioautography, labeled cytidine was incorporated into the rna of the early developmental stages but was not incorporated in the later stages. labeled leucine was incorporated into the cellular protein of all stages except mature erythrocytes but was incorporated at a higher level in the later stages. microphotometric measurements of ... | 1966 | 19866701 |
| the influence of neural retina and lens on lens regeneration from dorsal iris implants in triturus viridescens larvae. | | 1966 | 5971903 |
| the influence of neural retina and lens on the development of embryonic lens vesicles in amblystoma punctatum and triturus viridescens. | | 1966 | 5962950 |
| cancer and super-regeneration in triturus viridescens limbs. | | 1966 | 6012641 |
| observations on the deposition, structure, and cytochemistry of the jelly envelopes of the egg of the newt, triturus viridescens. | | 1966 | 4163765 |
| effects of kinetin on cell division in triturus viridescens. | | 1966 | 5929545 |
| a quantitative study of forelimb innervation in relation to regenerative capacity in the larval, land stage, and adult forms of triturus viridescens. | | 1965 | 5883954 |
| lens fiber differentiation and gamma crystallins: immunofluorescent study of wolffian regeneration. | from the adult lens of triturus viridescens, a fraction of proteins was isolated which corresponds to gamma-crystallins of higher vertebrates. tests by immuno-electrophoresis indicate that the antiserum against this fraction reacts with gamma-crystallins, but not with alpha- or beta-crystallins. with this antiserum, an immunofluorescent reagent has been prepared for detection of gamma-crystallins from newts. in the normal lens of the adult newt, these crystallins are detected in fiber cells and ... | 1965 | 14250323 |
| the effect of dose on the incorporation of 3h-thymidine in the nuclei of the liver capsule cells in the newt, triturus viridescens. | | 1965 | 14315090 |
| ultrastructural studies on developing oocytes of the salamander triturus viridescens. 3. early cytoplasmic changes and the formation of pigment. | | 1964 | 14188870 |
| ultrastructural studies on developing oocytes on the salamander triturus viridescens. ii. the formation of yolk. | | 1964 | 14188869 |
| induction of polypliody by kinetin in triturus viridescens. | | 1964 | 14152855 |
| autoradiography with meiotic chromosomes of the male newt (triturus viridescens) using h3-thymidine. | | 1963 | 14102809 |
| ultraviolet microbeam irradiation of vesicle-like bodies in agranular interphase cells cultured from triturus viridescens. | | 1963 | 14077655 |
| ultrastructural studies on developing oocytes of the salamander triturus viridescens. i. the relationship between follicle cells and developing oocytes. | | 1963 | 14072881 |
| effects of tall skin, epidermis, and dermis on limb regeneration in triturus viridescens and siredon mexicanum. | | 1963 | 13948322 |
| architectural regularity of the subepidermal reticulum of fibers in the adult newt, triturus viridescens (diemictylus v.). | | 1962 | 13991949 |
| the effects of spleen homotransplantation on the fate of skin homografts in triturus viridescens. | | 1962 | 13978584 |
| reactions to homografts in triturus viridescens. | | 1962 | 13890559 |
| kinetin, as a mitotic stimulant in triturus viridescens. | | 1962 | 13874324 |
| a study of hybridization and heteroploidy in two subspecies of triturus viridescens. | | 1962 | 14449821 |
| the effects of ultraviolet microbeam irradiation on the eosinophil granular leukocytes of triturus viridescens. | | 1962 | 13860944 |
| seasonal and sexual variation in the pituitary gland of triturus viridescens. | | 1961 | 13885495 |
| inhibition of lens regeneration by implanted lenses in the eyes of the adult newt diemictylus (triturus) viridescens. | | 1961 | 13702262 |
| fusion of nucleoli in cells cultured from the heart of triturus viridescens. | | 1961 | 14012557 |
| origin of the blastema in regenerating limbs of the newt triturus viridescens. an autoradiographic study using tritiated thymidine to follow cell proliferation and migration. | | 1961 | 13712434 |
| homografting of liver in the newt, triturus viridescens. | | 1961 | 13785407 |
| preblastemic changes of intramuscular glycogen in forelimb regeneration of the adult newt, triturus viridescens. | | 1960 | 13747950 |
| reconstitution of bone in regenerating forelimbs of adult triturus viridescens. | | 1960 | 13741508 |
| application of the electron microscope to the cytochemical peroxidase reaction in salamander leukocytes. | the present study has dealt with the localization by electron microscopy of the products of peroxidase reaction in neutrophil leukocytes in the subcapsular region of the livers of triturus viridescens. small pieces of liver tissue were fixed for 1 hour in buffered osmium tetroxide solution. after fixation they were divided into five groups: (a) not treated with any reagent (control); (b) treated for 4 minutes with the peroxidase reagent containing 0.3 per cent benzidine and 0.014 per cent (0.004 ... | 1960 | 14423044 |
| starvation and food-related behavior in a poikilotherm, the salamander, triturus viridescens. | | 1960 | 13850760 |
| catalase and aldolase in livers of regenerating and tumor-bearing triturus viridescens. | | 1959 | 14439430 |
| changes in the pattern of nitrogen excretion during the life cycle of the newt. | in the course of its life cycle the eastern newt, triturus (diemyctylus) viridescens, undergoes two metamorphoses, the first from the aquatic larva to the terrestrial red eft; the second, 2 to 3 years later, from the eft to the permanently aquatic and sexually mature adult newt. the pattern of nitrogen exretion changes during both transformations. older larvae excrete about 75 percent of the nitrogen as ammonia, 25 percent as urea; during the first metamorphosis the ratio of ammonia to urea is a ... | 1959 | 14426063 |
| immunochemical studies of muscle proteins in mature and regenerating limbs of the adult newt, triturus viridescens. | | 1959 | 14414512 |
| observations on the mechanism of induction of supernumerary limbs in adult triturus viridescens. | | 1959 | 13801917 |
| limb regeneration in the salamander, triturus viridescens, after large initial and during prolonged smaller injections of cortisone acetate. | | 1959 | 13619586 |
| studies on lens induction in amblystoma punctatum and triturus viridescens viridescens. ii. transplants of prospective lateral head ectoderm. | | 1958 | 13654671 |
| studies on lens induction in amblystoma punctatum and triturus viridescens viridescens. i. transplants of prospective belly ectoderm. | | 1958 | 13654664 |
| an electron microscope study of lampbrush chromosomes. | lampbrush chromosomes were isolated from germinal vesicles of oocytes from necturus maculatus, triturus viridescens, pseudotriton montanus and rana pipiens. after treatment of isolated nuclei with 10 per cent sucrose, chromosomes free of nuclear sap are obtained for examination in either the light microscope or in the electron microscope. for electron microscopy the chromosomes were prepared either by anderson's critical-point procedure or were embedded in methacrylate and sectioned. the evidenc ... | 1958 | 13502434 |
| effects of thyroxine on limb regeneration in the newt, triturus viridescens. | | 1956 | 13374461 |
| the adepidermal reticular network in the skin of the newt, triturus viridescens. | | 1956 | 13393977 |
| effect of size and number of brain cells on learning in larvae of the salamander, triturus viridescens. | | 1955 | 13255909 |
| the effect of cortisone acetate on the wound healing phase of triturus viridescens. | | 1955 | 13270869 |
| effect of xenoplastic adrenal transplants upon limb regeneration in normal and hypophysectomized newts (triturus viridescens). | | 1954 | 13224666 |
| induction of accessory limbs and of sarcoma in the newt (triturus viridescens) with carcinogenic substances. | | 1952 | 13009672 |