Publications
| Title | Abstract | Year(sorted descending) Filter | PMID Filter |
|---|
| pituitary growth hormones: further evidence for evolutionary conservatism based on immunochemical studies. | immunochemical relatedness of preparations of purified somatotropins (growth hormones) of somatotropins in pituitary extracts from various vertebrate species was investigated by applying an antiserum to a purified somatotropin from a submammalian species, the snapping turtle. with the exception of monkey somatotropin, all mammalian, reptilian, and avian preparations tested showed reactions of identity or near identity by immunodiffusion studies in agar gel. radioimmunoassay employing labeled rat ... | 1975 | 1060111 |
| antileptospiral activity in lower-vertebrate sera. | normal serum from the painted turtle (chrysemys picta), the snapping turtle (chelydra serpentina), and the frog (rana pipiens) were found to possess bactericidal activity towards leptospira. leptospires from both the parasitic and biflexa complexes were killed by these sera at high dilutions. this pattern differs from that of mammalian serum, as generally only the biflexa complex leptospires are killed by normal mammalian serum. the activity in c. picta serum was characterized as being complemen ... | 1975 | 1081972 |
| beveling of fine micropipette electrodes by a rapid precision method. | a technique has been developed for embedding alumina particles 0.05 micrometer in size in the surface of a polyurethane film laid on glass. this abrasive surface is used for rapid, precise, and reliable beveling of pyrex micropipettes with tip diameters at least as small as 0.1 micrometer. in the snapping turtle retina the beveled electrodes give much better cell penetration and intracellular response stability than unbeveled electrodes of considerably higher proach to this problem. | 1974 | 4841617 |
| pituitary regulation of appetite and growth in the turtles pseudomys scripta elegans and chelydra serpentina. | 1974 | 4813415 | |
| survival of skin allografts following embryonic limb bud transplants in the turtle, chelydra serpentina. | allografts of skin were observed in chelydra serpentina. the response to these grafts was modified by a previous transplantation of a limb bud at an early embryonic stage. when the same donor was used for all transplants, the first skin graft was accepted by the host. a second skin graft, however, was rejected at about the rate of a simple first set allograft of skin. the animals were conditioned by the embryonic limb graft; this embryonic graft can be undergoing rejection at the same time a fir ... | 1974 | 30326680 |
| incidence and progress of rejection of embryonic limb bud transplants in the turtle, chelydra serpentina. | allografts of embryonic limb buds were grafted orthotopically on embryos of chelydra serpentina. donors were from a different geographic area, the same geographic area, or siblings. the initial indication of rejection was excessive sloughing of epidermis. this was followed by loss of muscle, claws and bone. early histological changes involved an infiltration of mononuclear or rejection cells primarily associated with small blood vessels of the connective tissue. subsequently, muscle and bone wer ... | 1974 | 30322221 |
| snapping turtle plea. | 1973 | 17816278 | |
| the graft-versus-host reaction in the snapping turtle chelydra serpentina. | 1973 | 4148147 | |
| responses of single rods in the retina of the turtle. | 1. the responses of rods in the retina of the turtle, chelydra serpentina, have been studied by intracellular recording.2. the identification of rods as the origin of the recorded responses has been confirmed by marking with procion yellow.3. the response to a small spot of light was a hyperpolarization which increased with increasing light intensity. for dim, small diameter stimuli, the shape of the rod response was similar to that of cones but 2x slower and 2x larger in amplitude. the time int ... | 1973 | 4759680 |
| somatotropic effects of prolactin and growth hormone in juvenile snapping turtles (chelydra serpentina). | 1973 | 4753356 | |
| lymphoid tissue in the snapping turtle, chelydra serpentina. | 1972 | 4638093 | |
| evolutionary clock: nonconstancy of rate in different species. | by using various methods for comparing polypeptide sequences we find that the evolutionary divergence of rattlesnake cytochrome c from cytochromes c of species in other classes has been more rapid than that of cytochrome c of another reptile, the snapping turtle. this suggests that the evolutionary rate of change of cytochromes c is species-dependent as well as time-dependent. | 1972 | 5065730 |
| distribution of creatine, guanidinoacetate and the enzymes for their biosynthesis in the animal kingdom. implications for phylogeny. | 1. the distribution of creatine and the creatine-synthesizing enzymes in the animal kingdom has been investigated. creatine was found in tissues of all vertebrates examined, and in various invertebrates from phyla annelida, echinodermata, hemichordata and chordata, subphylum cephalochordata. the activities of the creatine-synthesizing enzymes, arginine-glycine transamidinase and guanidinoacetate methylpherase, were not detected in the hagfish or in any of the invertebrates, including those in wh ... | 1972 | 5010856 |
| survival of embryonic limb bud transplants in snapping turtles. | 1971 | 5132600 | |
| structure and development of the optic tectum of the snapping turtle (chelydra serpentina l.). | 1971 | 5132820 | |
| survival of xenogeneic grafts of embryonic pigment and carapace rudiments in embryos of chelydra serpentina. | 1970 | 4922223 | |
| extirpation experiments on embryonic rudiments of the carapace of chelydra serpentina. | 1970 | 5482414 | |
| twinning in the common snapping turtle, chelydra serpentina. | 1970 | 5461766 | |
| eimeria chelydrae n. sp. (protozoa: eimeriidae) from the snapping turtle, chelydra serpentina. | 1969 | 5388988 | |
| the maturation of the capacity to reject skin allografts and xenografts in the snapping turtle, chelydra serpentina. | 1969 | 4893941 | |
| a series of stages in the embryonic development of chelydra serpentina. | 1968 | 5681661 | |
| tissue culture analysis of immunological capacity of snapping turtles. | 1968 | 4877627 | |
| motility of the turtle embryo, chelydra serpentina (linné). | periodic motility of turtle embryos was observed during their incubation periods (60 +/- 5 days). cyclic activity was first observed between days 10 to 14; it increased to a peak level of 50 percent of the standard observation period on day 30 +/- 5, then declined to low levels until hatching activities were initiated. during the first third of the incubation period, motility of the turtles closely resembled that previously described for chick embryos at similar stages of development. | 1967 | 5212408 |
| depletions in the cervical and thoracolumbar sympathetic system following removal of neural crest from the embryo of chelydra serpentina. | 1966 | 5969768 | |
| primary structure of the cytochrome c from the snapping turtle, chelydra serpentina. | 1966 | 5968568 | |
| food imprinting in the snapping turtle, chelydra serpentina. | three groups of hatchling snapping turtles, totaling 20, were fed either meat, fish, or worms. when they were tested for preference after 12 daily feedings, each preferred the diet to which it was accustomed. after 12 more days of eating a different food, each still preferred its original diet. a form of imprinting may be operative in the feeding behavior of this species. | 1966 | 5908961 |
| experimental studies on the columella-capsular interrelationship in the turtle chelydra serpentina. | 1965 | 5861722 | |
| an experimental approach to the development of ear capsule in the turtle, chelydra serpentina. | 1965 | 14329484 | |
| hypoxia: effects on heart rate and respiration in the snapping turtle. | in response to atmospheres containing decreasing amounts of oxygen, snapping turtles (chelydra serpentina) maintained a fairly constant oxygen uptake. their heart rate increased and the period of apnea between breathing cycles decreased. small animals had a slightly greater mean uptake per gram than those five to ten times as large. | 1963 | 14014707 |
| a new species of auridistomum (trematoda: auridistomidae) from snapping turtles of georgia. | 1959 | 13802130 | |
| analysis of vagal and cholinesterase effects on the heart of chelydra serpentina. | 1958 | 13606222 | |
| use of intravascular carbon dioxide gas to demonstrate interatrial septal defects. | 1958 | 13606221 | |
| circulation and blood pressure in the great vessels and heart of the turtle (chelydra serpentina). | 1957 | 13458464 | |
| the effects of electrolytes and sugars on the erythrocytes of the turtle, chelydra serpentina. | 1949 | 18108892 | |
| the survival of beat in the removed heart of the snapping turtle. | 1916 | 17840076 | |
| on chelydra serpentina. | 1893 | 17832441 |