Publications
| Title | Abstract | Year(sorted ascending) Filter | PMID Filter |
|---|
| comparing the effects of atrazine and an environmentally-relevant mixture on estrogen-responsive gene expression in the northern leopard frog and the fathead minnow. | in nebraska, fish are exposed to herbicides in agricultural runoff. study objectives were to determine 1) if fathead minnows and northern leopard frogs exposed to atrazine experience alterations in gene expression, and 2) whether these changes are elicited by a simulated herbicide mixture. following a 7-day exposure to atrazine female minnows were defeminized, while male frogs were feminized. the mixture did not elicit statistically significant effects in either species. this article is protecte ... | 0 | 29314190 |
| rana pipiens. | 1907 | 17743204 | |
| on the chemistry and development of the yolk platelets in the egg of the frog (rana pipiens). | 1909 | 17788753 | |
| cultivation of the skin epithelium of the adult frog, rana pipiens. | 1. fragments of skin taken from the back of the leopard frog were cultivated in a mixture of plasma and muscle extract of the same species. 2. a few hours after explanation, processes of activity are seen to arise, which finally lead to the formation of a compact epithelial rim around the fragment of skin. 3. these epithelial cells undergo gradual transformation into a spindle-shaped type of cell; in this form they resemble the spindle cells which have been described as connective tissue cells. ... | 1914 | 19867847 |
| the form of the epithelial cells in cultures of frog skin, and its relation to the consistency of the medium. | 1. fragments of skin from the leopard frog (rana pipiens) were cultivated in media of varying consistency. a mixture of frog plasma, frog muscle extract, chicken plasma, and chicken embryo extract usually produced a very firm medium; a mixture of frog plasma, frog muscle extract, and chicken plasma, one less firm (semi-firm); and a mixture of frog plasma and frog muscle extract a medium of a consistency varying from soft to liquid. 2. (a) in a firm medium the cells which migrate into the medium ... | 1915 | 19867903 |
| changes in pigment epithelium cells and iris pigment cells of rana pipiens induced by changes in environmental conditions. | 1. retina pigment epithelium cells and iris pigment cells are placed in an identical medium. 2. the differentiation into two different parts, as well as the pigment strains of the migrating pigment epithelium cells, is lost. the normally highly specialized cuticular structures disappear. the cells begin to move and assume a spindle shape, thus losing their original hexagonal shape. 3. the migrating iris pigment cells begin to show a distribution of the pigment, similar to that exhibited by the m ... | 1916 | 19868067 |
| the results of extirpation of the anterior lobe of the hypophysis and of the thyroid of rana pipiens larvae. | 1916 | 17742316 | |
| the effects of thyroid removal upon the development of the gonads in the larvae of rana pipiens. | 1917 | 17782269 | |
| experiments in the transplantation of the hypophysis of adult rana pipiens to tadpoles. | 1920 | 17732857 | |
| adaptation of cutaneous tactile receptors : iv. electrolyte content of frog skin. | the potassium content of the skin of rana pipiens is found to be 132 m.g. per cent. this is roughly of the order of magnitude of the content of potassium in nerve. analyses were also made of the skin for na, ca, mg, cl, s, and p. | 1936 | 19872972 |
| demonstration of a hatching secretion in rana pipiens schreber. | 1936 | 16588102 | |
| lipoid substances of the ovary during ova production in rana pipiens. | 1938 | 16994942 | |
| the flicker response contour for the frog. | the flicker response contour for the frog rana pipiens exhibits the duplex character typical for most vertebrates. by comparison (under the same conditions of temperature, 21.5 degrees , and light-time fraction, = 0.5), the low intensity section of the f - log i curve is the smallest thus far found. the cone portion of the curve is satisfactorily described by a probability integral. the rod part represents the addition of a small group of sensory effects upon the lower end of the cone curve, fro ... | 1939 | 19873150 |
| anaerobic glycogenolysis in the muscles of rana pipiens living at low temperatures. | 1. a considerable proportion of r. pipiens caught in the spring and stored without food for several weeks at about 4 degrees c. had gastrocnemii that did not break down glycogen when they contracted anaerobically to complete exhaustion. a smaller number of the same muscles did not produce lactate. 2. there was no evident relation between failure to break down glycogen and the glycogen content of such muscles, some of which had more than 500 mg. of glycogen per 100 gm. of tissue. 3. the hypothesi ... | 1941 | 19873242 |
| kidney stones in rana pipiens tadpoles reared on spinach. | 1941 | 17809649 | |
| electric impedance of the frog egg. | electrical impedance measurements were made upon unfertilized and fertilized eggs of the leopard frog, rana pipiens, over a frequency range of 0.05 to 10 kc. average values of 170 ohm cm.(2) were obtained for the plasma membrane resistance of the egg, 2.0 microf/cm.(2) for the plasma membrane capacity, 86 degrees for the phase angle of the membrane, and 570 ohm cm. for the specific resistance of the interior. these values did not change upon fertilization. no spontaneous rhythmical impedance cha ... | 1942 | 19873312 |
| x-ray diffraction studies on frog muscles. | 1. x-ray diffraction studies of sartorius muscles of rana pipiens were made in a new x-ray diffraction camera which permits exposures of 3 to 6 minutes. the object-film distance can be varied from 20 to 80 mm; the muscle inside the camera can be electrically stimulated while contracting isotonically or isometrically, and can be observed by a special device. after exposures up to 30 minutes (approximately 40,830 r) muscles are still alive and responsive. 2. contrary to the x-ray diffraction patte ... | 1944 | 19873411 |
| action of potassium and narcotics on rectification in nerve and muscle. | electrical rectification was demonstrated in whole sartorius muscle and sciatic nerve of rana pipiens and also in the single giant nerve fiber of the northern squid, ommastrephes illecibrossus. it is probably a property of the plasma membrane. rectification decreases reversibly under the influence of increased concentrations of the potassium ion and with chloroform, veratrine sulfate and isoamyl carbamate. no effect was found with lack of calcium, excess calcium, or barium chloride. decrease in ... | 1944 | 19873404 |
| the development of late gastrula explants of rana pipiens in salt solution. | 1945 | 21010864 | |
| a study of the peripheral blood of a metamorphosing anuran (rana pipiens). | 1945 | 21005545 | |
| nitrogen metabolism of rana pipiens during embryonic development. | 1946 | 20275394 | |
| effect of mammalian pituitary gonadotropins on ovulation in the frog, rana pipiens. | 1946 | 20273829 | |
| hybridization between rana palustris and different geographical forms of rana pipiens. | 1946 | 16578205 | |
| incipient intraspecific isolating mechanisms in rana pipiens. | 1946 | 20985723 | |
| incipient intraspecific isolating mechanisms in rana pipiens. | 1946 | 17247199 | |
| studies in the development of frog hybrids; embryonic development in the cross rana pipiens female x rana sylvatica male. | 1946 | 21022217 | |
| the inheritance of nuclear properties which find expression in the first 72 hours of development of rana pipiens, schreber. | 1946 | 21020536 | |
| a study of adrenal cortical tissue in rana pipiens with special reference to metamorphosis. | 1946 | 21014282 | |
| stages in the normal development of rana pipiens larvae. | 1946 | 21013391 | |
| seasonal variation in the gonadotropic potency of dried anterior pituitaries of rana pipiens. | 1947 | 17821392 | |
| effects of sex hormones and thyroxine on hematopoiesis in the frog, rana pipiens. | 1947 | 18895477 | |
| effects of some thyroid-inhibitors upon the development of rana pipiens tadpoles. | 1947 | 18895461 | |
| studies in the development of frog hybrids; competence of the gastrula ectoderm of rana pipiens female crossed with rana sylvatica male hybrids. | 1947 | 20255212 | |
| hybridization between rana pipiens from vermont and eastern mexico. | 1947 | 16578248 | |
| the use of the spectrophotometer for measuring changes in skin reflectance in rana pipiens. | 1947 | 20342541 | |
| effects of pressure on the uterine eggs of rana pipiens. | 1947 | 20341973 | |
| steroid depression in rana pipiens. | 1947 | 20244200 | |
| influence of endocrine factors on hemopoiesis in the adult frog, rana pipiens. | 1948 | 18889753 | |
| the influence of variations in the nucleo-cytoplasmic ratio on the development of haploid embryos of the frog, rana pipiens. | 1948 | 18934402 | |
| changes in the form of the blastopore in blocked gastrulae of rana pipiens. | 1948 | 18932965 | |
| the polar bodies of the frog, rana pipiens. | 1948 | 18882508 | |
| post-fertilization changes in the egg surface of rana pipiens. | 1948 | 18882483 | |
| studies in the development of frog hybrids; inductive ability of the dorsal lip region of rana pipiens female xrana sylvatica male hybrids. | 1948 | 18863657 | |
| the use of the male north american frog, rana pipiens, in the diagnosis of pregnancy. | 1948 | 18915893 | |
| influence of temperature on radio-sensitivity in the frog, rana pipiens. | 1948 | 18938629 | |
| the male frog, rana pipiens, as a new test animal for early pregnancy. | 1948 | 17791766 | |
| the effect of staphylococcal enterotoxin upon the frog, rana pipiens. | 1949 | 15391733 | |
| effect of ddt on functional development of larvae of rana pipiens and fundulus heteroclitus. | 1949 | 18116441 | |
| induction of metastasis of frog carcinoma by increase of environmental temperature. | metastasis of the kidney carcinoma of leopard frogs (rana pipiens) has been induced by exposing tumor-bearing animals for approximately 50 days to a constant temperature of 28 degrees c. under these conditions 54 per cent of the frogs developed secondary growths, whereas in groups kept at 18 degrees or at 7 degrees metastatic dissemination was found in only 6 per cent. moreover, at the elevated temperature the metastases were usually more numerous and more widely disseminated; they were also fai ... | 1949 | 18110881 |
| the use of the male leopard frog (rana pipiens) as a pregnancy test animal. | 1949 | 18110663 | |
| effects of pressure on the cleaving eggs of the frog (rana pipiens). | 1949 | 15410484 | |
| the use of the male rana pipiens frog in the diagnosis of pregnancy and the differential diagnosis of abortions. | 1949 | 15392754 | |
| x-radiation of eggs of rana pipiens at various maturation stages. | 1949 | 18142362 | |
| the reliability of the male north american frog (rana pipiens) in the diagnosis of pregnancy. | 1949 | 18146971 | |
| the influence of egg volume on the development of haploid and diploid embryos of the frog, rana pipiens. | 1949 | 18141501 | |
| an appraisal of the male north american frog (rana pipiens) pregnancy test with suggested modifications of the original technique. | 1949 | 18116321 | |
| geographic variation of adaptive characters in rana pipiens schreber. | 1949 | 18115114 | |
| the effect of thiourea on the thyroid gland of the winter frog (rana pipiens) with some observations on the testis. | 1949 | 18113439 | |
| the neuromotor mechanism of the small blood vessels in membranes of the frog (rana pipiens) and the hamster (mesocricetus auratus) with reference to the normal and pathological conditions of blood flow. | 1950 | 15427652 | |
| the male frog (rana pipiens) compared to the female rat as a pregnancy test animal. | 1950 | 14784112 | |
| a rapid method for demonstrating the action of staphylococcus enterotoxin upon rana pipiens. | 1950 | 14788860 | |
| the rana pipiens frog test for pregnancy. | 1950 | 14796512 | |
| an evaluation of the rana pipiens male frog pregnancy test. | 1950 | 14771169 | |
| effect of thiouracil on uptake of radioactive iodine by thyroid gland of summer frogs (rana pipiens). | 1950 | 15432736 | |
| mitosis of the erythrocytes in the circulating blood of rana pipiens. | 1950 | 14779006 | |
| seasonal variation in sensitivity of rana pipiens to chorionic gonadotropin. | 1950 | 15404902 | |
| the male frog, rana pipiens, as a test animal for determining the level of urinary chorionic gonadotrophin during pregnancy. | 1950 | 15405828 | |
| gonadotropic activity of blood serum from hypophysectomized frogs, rana pipiens. | 1950 | 15409097 | |
| the male frog, rana pipiens as a biological test animal for the diagnosis of pregnancy. | 1950 | 15408501 | |
| seasonal variation in the pregnancy test using rana pipiens. | 1951 | 14885135 | |
| inhibition of the gametokinetic response in male "rana pipiens" with adrenolytic drugs. | 1951 | 14872843 | |
| effect of administration of intermedin upon melanin content of the skin of rana pipiens. | 1951 | 14844386 | |
| an investigation of the capacity for cleavage and differentiation in rana pipiens eggs lacking "functional" chromosomes. | 1951 | 14850653 | |
| a study of the expression of the burnsi gene in adult rana pipiens. | 1951 | 14824422 | |
| observations on the use of the male north american frog (rana pipiens) in pregnancy diagnosis. | 1951 | 14814202 | |
| the concentration of riboflavin in the tissues of the embryos, larvae, juveniles, and adults of the frog, rana pipiens pipiens. | 1951 | 14807721 | |
| temperature-pressure studies on the cardiac rate in tissue culture explants from the heart of the tadpole (rana pipiens). | 1952 | 13011169 | |
| use of the male grass frog (rana pipiens) in pregnancy testing. | 1952 | 14933500 | |
| studies on the mechanism of the spermatic release of the male north american frog (rana pipiens). | 1952 | 14927724 | |
| effects of purine and pyrimidine analogues on development of rana pipiens. | 1952 | 14920451 | |
| studies on the mechanism of the spermatic release of the male north american frog (rana pipiens); reaction to various hormones. | 1952 | 14907864 | |
| phosphatase activity in the tissues of the frog, rana pipiens. | 1952 | 14907823 | |
| morphogenesis and metabolism of amphibian larvae after excision of heat. i. morphogenesis of heartless tadpoles of rana pipiens. | 1953 | 13104999 | |
| regular occurrence of the haploid number of chromosomes in mesenchymal cells of the tail tip of rana pipiens tadpoles. | 1953 | 13111179 | |
| the occurrence of regional distribution of perivascular melanophores within the optic lobes of the frog, rana pipiens. | 1953 | 13092552 | |
| radioactive iodine as an indicator of the uptake of iodine by the liver, gastrocnemius, and thyroid of rana pipiens. | 1953 | 13056588 | |
| respiration of the parts of the hybrid gastrula rana pipiens x r. sylvatica. | 1953 | 13056585 | |
| evidence for the termination of neurosecretory fibers within the pars intermedia of the hypophysis of the frog, rana pipiens. | 1953 | 13016995 | |
| effects of ethyl carbamate (urethan) and related compounds on early developmental processes of the leopard frog, rana pipiens. | 1954 | 13160959 | |
| activities of 6-mercaptopurine and related compounds on embryonic and regenerating tissues of rana pipiens. | 1954 | 14350525 | |
| phenol red transport in the pronephros and mesonephros of the developing frog (rana pipiens). | 1954 | 13233290 | |
| analogues of nucleic acid derivatives and the growth and development of rana pipiens. i. the cyclic inhibition of the development of rana pipiens. | 1954 | 13211750 | |
| cytochemical study of the physiological activities in the pars intermedia of rana pipiens. | 1954 | 13180998 | |
| deoxyribonucleic acid content of nuclei in tail mesenchyme of rana pipiens tadpoles. | 1955 | 13244626 | |
| a study of ribonuclease and desoxyribonuclease during the early developmental stages of rana pipiens. | 1955 | 14391301 | |
| effects of temperature, light, and nutrition on the sensitivity of the male rana pipiens to exogenous chorionic gonadotropin. | 1955 | 14372980 | |
| mitotic frequency in normal and regenerating tail tips of rana pipiens embryos. | 1955 | 14380256 | |
| seasonal variation in gastric hydrochloric acid production in rana pipiens. | 1955 | 14376555 | |
| effect of purified gonadotropins upon release of spermatozoa in the frog, rana pipiens. | 1955 | 14371674 | |
| the mesencephalic v nucleus in anurans. i. normal development in rana pipiens. | 1955 | 14367559 |