First fossil record of the South American frog genus Odontophrynus Reinhardt and Lütken, 1862 (Anura, Neobatrachia)

2016 ◽  
Vol 36 (6) ◽  
pp. e1228657 ◽  
Author(s):  
Guillermo F. Turazzini ◽  
Matías L. Taglioretti ◽  
Raúl O. Gómez
Keyword(s):  
Fossil Record ◽  
South American ◽  
The South ◽  
American Frog

scholarly journals Paleobiology of Titanosaurs: Reproduction, Development, Histology, Pneumaticity, Locomotion and Neuroanatomy from the South American Fossil Record

Ameghiniana ◽  
2015 ◽  
Vol 52 (1) ◽  
pp. 29 ◽  
Author(s):  
Rodolfo A. García ◽  
Leonardo Salgado ◽  
Mariela S. Fernández ◽  
Ignacio A. Cerda ◽  
Ariana Paulina Carabajal ◽  
...  
Keyword(s):  
Fossil Record ◽  
South American ◽  
The South

Membrane Potentials in the Muscles of the South American Frog, Leptodactylus Ocelatus

1955 ◽  
Vol 32 (3) ◽  
pp. 539-546
Author(s):  
E. J. HARRIS ◽  
H. MARTINS-FERREIRA
Keyword(s):  
Ringer Solution ◽  
Resting Potential ◽  
Phosphate Solution ◽  
Constant Field ◽  
South American ◽  
The South ◽  
American Frog ◽  
K Concentration ◽  
Phosphate Solutions ◽  
External K

1. The resting potential of the fibres of the South American frog Leptodactylus ocelatus has been measured using microelectrodes. 2. In 2 mM. potassium Ringer solution values of 85-103 mV. were obtained. The value for a given muscle depends upon the external K concentration and the relation between resting potential and the concentrations of K, Na and Cl in the medium can be fitted to the constant field solution of the diffusion equation. 3. Use of phosphate solutions in place of chloride solutions led to lower resting potentials at a given K concentration, which is understandable since the contribution of Cl ions to the resting potential is not present in the phosphate solution. 4. The action potential was observed. Its rate of fall was less when the positive overshoot was low than when the overshoot was high. 5. Analyses of muscles and plasma were made.

Purification and Properties of Laticeptin, an Antimicrobial Peptide from Skin Secretions of the South American Frog Leptodactylus laticeps

2006 ◽  
Vol 13 (4) ◽  
pp. 411-415 ◽  
Author(s):  
J. Conlon ◽  
Nadia Al-Ghaferi ◽  
Bency Abraham ◽  
Agnes Sonnevend ◽  
Jay King ◽  
...  
Keyword(s):  
Antimicrobial Peptide ◽  
South American ◽  
The South ◽  
Purification And Properties ◽  
Skin Secretions ◽  
American Frog

In vivo ionic exchange through the skin of the South American frog, Leptodactylus ocellatus

1968 ◽  
Vol 25 (1) ◽  
pp. 311-317 ◽  
Author(s):  
Alfredo Salibián ◽  
Silvia Pezzani-Hernández ◽  
Federico García Romeu
Keyword(s):  
South American ◽  
Ionic Exchange ◽  
The South ◽  
American Frog

scholarly journals The Origin of the Short-Circuit Current in the Isolated Skin of the South American Frog Leptodactylus ocellatus

1963 ◽  
Vol 47 (2) ◽  
pp. 393-402 ◽  
Author(s):  
José A. Zadunaisky ◽  
Oscar A. Candia ◽  
Dante J. Chiarandini
Keyword(s):  
Copper Ions ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Chloride Ions ◽  
Potential Difference ◽  
South American ◽  
The South ◽  
Net Flux ◽  
American Frog ◽  
Short Circuit Condition

In isolated skins of Leptodactylus ocellatus the short-circuit current is smaller than the sodium net flux and this difference disappears when the skins are bathed in solutions in which the chloride ions have been replaced by sulfate or methylsulfate ions. There is a net movement of chloride ions from outside to inside of the skins in the short-circuit condition with chloride Ringer's solutions bathing the skins. The addition of ouabain to the inside solution markedly reduced not only sodium net flux but also the chloride net influx found. Copper ions added to the outside solutions produced a rise in short-circuit current, as well as the known increase in potential difference. In sodium-free Ringer's (sodium replaced by choline) the orientation of the potential difference across the skins was reversed, the inside being negative instead of positive. The results are interpreted as direct or indirect indications of the presence of a net transfer of chloride ions from outside to inside of these frog skins.

Leptoglycin: A new Glycine/Leucine-rich antimicrobial peptide isolated from the skin secretion of the South American frog Leptodactylus pentadactylus (Leptodactylidae)

Toxicon ◽  
2009 ◽  
Vol 54 (1) ◽  
pp. 23-32 ◽  
Author(s):  
Juliana C. Sousa ◽  
Raquel F. Berto ◽  
Elicélia A. Gois ◽  
Nauíla C. Fontenele-Cardi ◽  
José E.R. Honório-Júnior ◽  
...  
Keyword(s):  
Antimicrobial Peptide ◽  
South American ◽  
Skin Secretion ◽  
The South ◽  
American Frog
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