Results 101 to 110 of about 3,513 (150)

Plasmacytoma in a Rana pipiens

1969
Though the occurrence of tumors among amphibians has been recognized for many years, these lesions have been considered quite rare. Lucke and Schlumberger (1) reviewed the problem of neoplasia in cold-blooded vertebrates and concluded that amphibians are no less susceptible to neoplasms than other vertebrates.
Sydney S. Schochet, Peter W. Lampert
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Behavioural thermoregulation in Rana pipiens tadpoles

Journal of Thermal Biology, 1978
Abstract 1. 1.|The mean preferred temperature (final preferendum) of Rana pipiens tadpoles in an electronic thermoregulatory shuttlebox was 27.9°C. 2. 2.|The daytime modal preferendum was 28°C, while the nocturnal mode was 27°C; mean preferenda did not differ significantly between night (28.1°C) and day (27.8°C). 3.
Martha E. Casterlin, William W. Reynolds
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Gastric mucus production in Rana pipiens

American Journal of Physiology-Legacy Content, 1962
The production of gastric mucus in vitro by Rana pipiens was studied using histamine stimulation. The frogs were kept at a constant temperature (21 C) both prior to and during experimentation. Quantitative determinations of mucoproteose, mucoprotein, and mucoid of the visible mucus were performed over a 13-month period, utilizing 340 animals in ...
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Glycoprotein secretion by isolated rana pipiens gastrula chordamesoderm

Cell Differentiation, 1980
Abstract It has been confirmed that involuted chordamesoderm, when placed in the blastocoele cavity of early Rana pipiens gastrulae, induces the formation of anterior neural structures. Isolates of chordamesoderm grown in vitro release macromolecules which incorporate [ 3 H]leucine, [ 14 C]glucosamine and [ 14 C]acetate but not [ 3 H]uridine or Na ...
D D, Kaska, E L, Triplett
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Lysozyme Ontogeny In Rana Pipiens.

1970
PhD ; Zoology ; University of Michigan, Horace H. Rackham School of Graduate Studies ; http://deepblue.lib.umich.edu/bitstream/2027.42/186484/2/7115258 ...
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Classical Conditioning in Frogs (Rana pipiens)

Journal of Herpetology, 1968
A classical conditioning procedure was used to determine the degree of conditioning which could be achieved with frogs. An experimental and a pseudoconditioning control group were used. The CS consisted of bub- bles and the UCS was a mild electric shock. The results showed that after 75 trials, some conditioning was achieved which, for the experimental
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Tumour Induction in Rana pipiens Tadpoles

Nature, 1940
DURING the normal development of Amphibians the well-known ‘;fields’ of organization operate to induce morphological differentiation1. Furthermore, adult Urodeles and larval Anurans are known to retain local fields which are active in the regeneration of parts2. Therefore, problems in abnormal growth may well be studied in those Amphibians which retain
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Homing in Leopard Frogs, Rana Pipiens

Ecology, 1968
A field study of the movements of displaced adult Rana pipiens was conducted in two summers in northern Michigan, using a thread trailing device to follow the animals. Animals displaced relatively short distances (to about 1 km) from their capture site generally oriented correctly in their homeward direction.
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Phase separation-based electrospun Janus nanofibers loaded with Rana chensinensis skin peptides/silver nanoparticles for wound healing

Materials and Design, 2021
Yun-Gang Luo, Zhi-Qiang Cheng
exaly  

Rana pipiens Speckle Heterozygotes

Journal of Heredity, 1968
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