Results 131 to 140 of about 856 (158)

I W Rowlands, Barbara J Weir and the biology of the hystricomorph rodents

Reproduction, 2023
In brief Current research on the genomics, ecology and reproductive biology of hystricomorph rodents relies on the pioneering studies of B J Weir and I W Rowlands. We show the enduring influence of a symposium on hystricomorph biology held 50 years ago. Abstract The rodent suborder Hystricomorpha comprises seven families from Africa and Asia and ten
Anthony M Carter, Francisco Acuña, Claudio G Barbeito   +2 more
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Evolutionary change in the insulin receptors of hystricomorph rodents

Nature, 1979
INSULIN receptors have been thought to have remained unaltered despite evolutionary changes in the hormone(1). Because insulins from hystricomorph rodents are known to be highly substituted compared with other mammalian insulins, we decided to investigate the insulin receptor of some hystricomorphs to determine whether evolutionary change had occurred ...
R, Horuk, P, Goodwin, K, O'connor, R W, Neville, N R, Lazarus, D, Stone   +5 more
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Genetic variation of phosphoglucose isomerase in some hystricomorph rodents

Biochemical Genetics, 1972
Phosphoglucose isomerase electrophoretic variation has been studied in hystricomorph rodents. Intraspecies variation was found in chinchilla (Chinchilla laniger) and cuis (Galea musteloides). Interspecies hybridization of Cavia aperea and Cavia porcellus was found to produce hybrid enzymes.
N D, Carter, M R, Hill, B J, Weir
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Urine composition of some hystricomorph rodents confined to metabolism cages

Comparative Biochemistry and Physiology Part A: Physiology, 1972
Abstract 1. 1. A comparison was made of the composition of urine from six species of hystricomorphs (chinchilla, plains viscacha, degu, cuis, native guinea-pig and domestic guinea-pig) maintained under laboratory conditions. 2. 2. All species produced moderate amounts of hypertonic urine and daily rhythms in water and electrolyte excretion ...
D, Bellamy, B J, Weir
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Pulmonary trophoblastic deportation in the hystricomorph rodent Lagostomus maximus

Placenta
Trophoblast has been reported in the lungs of gestating eutherian mammals with hemochorial placenta, including humans, cotton rats, and American hares. This study describes the discovery of trophoblastic-like cells in the lungs of Lagostomus maximus.Lung and placenta samples from non-pregnant and pregnant plains viscachas were analyzed using histology ...
Francisco Acuña, Gimena Gomez Castro, Daniel González Gómez, Agostina Terraza, Mirta Alicia Flamini, Claudio Gustavo Barbeito   +5 more
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STUDIES ON THE ENDOPARASITIC FAUNA OF TRINIDAD MAMMALS: VII. PARASITES OF HYSTRICOMORPH RODENTS

Canadian Journal of Zoology, 1951
A possible new variety of cestode, Raillietina (R.) demerariensis var. trinitatae, and two new varieties, Trichuris gracilis var. trinitatae and Aspidodera binansata var. agoutiae and a new species of nematode, Helminthoxys urichi are recorded from the agouti and lappe from Trinidad, B.W.I.
T. W. M. Cameron, M. R. Reesal
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A monomeric insulin from the porcupine (Hystrix cristata), an Old World hystricomorph

Nature, 1980
The insulins of New World hystricomorph rodents exhibit many novel amino acid changes in primary structure when compared with other mammalian insulins. These changes give rise to unusual properties (low potency, failure to self-associate) not shared by other naturally-occurring insulins.
R, Horuk, T L, Blundell, N R, Lazarus, R W, Neville, D, Stone, A, Wollmer   +5 more
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Head myology of wild cavies (Caviidae, Caviomorpha) and functional implications of hystricomorphous and hystricognathous configurations

Journal of Mammalian Evolution, 2023
Cavies are one of the most-specialized grinding rodents, with folivorous and grass-based diets. Antecedents on head myology are focused mainly on domestic guinea pig. Here, we analyze three specimens of wild caviines (two of Cavia aperea and one of Galea leucoblephara), describing, illustrating, mapping, and weighing facial and masticatory muscles ...
Alicia Álvarez, Marcos D. Ercoli, Myriam Boivin, Agustina M. Ortiz Tejerina, S. Rocío Moyano   +4 more
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Melatonin binding sites in sciurid and hystricomorph rodents: studies on ground squirrels and guinea pigs

Brain Research, 1994
Little is known about the distribution of binding sites for the pineal hormone melatonin in non-myomorph rodents. We used 2-[125I]iodomelatonin (IMEL) to analyze the distribution, affinity, and specificity of binding sites in the golden-mantled ground squirrel, a sciurid rodent that reportedly lacks IMEL binding sites in the brain. Specific binding was
Bittman, EL, THOMAS, EM, ZUCKER, I
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The primary structures of pancreatic ribonucleases from African porcupine and casiragua, two hystricomorph rodent species

Biochimica et Biophysica Acta (BBA) - Protein Structure and Molecular Enzymology, 1982
The amino acid sequences of the pancreatic ribonucleases from African porcupine (Hystrix cristata) and casiragua (Proechimys guairae, a caviomorph rodent species related to the coypu) were determined. The ribonucleases were isolated form minces of pancreatic tissue which had been used for the extraction of the insulins.
Beintema, Jaap J., Knol, Geke, Martena, Bert   +2 more
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