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Biomedical subjects

J Palomeque

Publications and source records attributed to J Palomeque.

28 records · Page 2Linked to original sources
PubMed1983

Erythrocytic phosphates and flying activity in birds.

1. The intraerythrocitary organic phosphates in different avian species (Sturnus vulgaris, Apus apus, Gallus gallus domesticus, Coturnix coturnix japonica and Columba livia) were analyzed by ionic exchange chromatography. The chromatograms of these species revealed the presence of ADP, ATP, GTP, IPP and inorganic phosphate. 2. The main organic phosphates (ATP and IPP) and the inorganic phosphate were also evaluated, directly, in other specimens. The IPP levels were very similar in all species; however, for ATP, there were great differences, with the lowest value in chickens (1.53 mumol/ml) and the highest value in starlings (5.58 mumol/ml). 3. A progressive training program for homing pigeons with flights from 80 to 760 km did not cause significant variations in IPP levels. Nevertheless, the ATP concentration values showed significant changes. 4. A specific relationship between the flying habits in different species of birds or the training exercise for pigeons and the erythrocyte organic phosphates, was not evident. 5. Hematocrit and hemoglobin values showed significant changes during the progressive training program.

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PubMed1982

Method of determining the osmotic fragility curves of erythrocytes in birds.

The osmotic fragility of erythrocytes in 3 species of birds (Gallus gallus domesticus, Coturnix coturnix japonica, Columba livia) and the rat was determined. The results of this study point to a smaller osmotic fragility. Birds, with elliptical erythrocytes, have a lower osmotic fragility than species with round erythrocytes, like most of the mammals.

Animals↗
PubMed1981

Erythrocyte size in some wild Spanish birds.

An analysis was made of the erythrocyte dimensions of 21 species of the following Passeriformes common to the Iberian Peninsula: Fringilidae, Silvidae, Turdidae, Prunellidae, Ploceidae, Certhiidae, Emberizidae, Paridae, Troglodytidae and Apodiformes: F. Apodidae. The erythrocyte dimensions in Passeriformes were very uniform. Only the Silvidae presented a significant correlation (r = 0.96) between body size and cell area. In Apodiformes, cell area and cell length and width were significantly greater (p less than 0.01) than red blood cell dimensions in Passeriformes.

Animals↗
PubMed1975

A comparison of some methods for determining oxygen dissociation curves of fish blood.

A brief description is given of four different methods for determining the oxygen dissociation curve of trout blood at pH 7.8 and 15 degrees C. A comparison of the results obtained indicates that the methods give similar results, especially when used by experienced workers. The relative advantages and disadvantages of the methods for determination of some O2-carrying parameters of fish blood are discussed.

Animals↗
PubMedDate not supplied

Capillarity and fibre types in locomotory muscles of wild yellow-legged gulls (Larus cachinnans).

This study analyzes the capillarity and fibre-type distribution of six locomotory muscles of gulls. The morphological basis and the oxygen supply characteristics of the skeletal muscle of a species with a marked pattern of gliding flight are established, thus contributing to a better understanding of the physiology of a kind of flight with low energetic requirements. The four wing muscles studied (scapulotriceps, pectoralis, scapulohumeralis, and extensor metacarpi) exhibited higher percentages of fast oxidative glycolytic fibres (>70%) and lower percentages of slow oxidative fibres (<16%) than the muscles involved in nonflight locomotion (gastrocnemius and iliotibialis). Capillary densities ranged from 816 to 1,233 capillaries mm(-2), having the highest value in the pectoralis. In this muscle, the fast oxidative glycolytic fibres had moderate staining for succinate dehydrogenase and relatively large fibre sizes, as deduced from the low fibre densities (589-665 fibres mm(-2)). All these findings are seen as an adaptive response for gliding, when the wing is held outstretched by isometric contractions. The leg muscles studied included a considerable population of slow oxidative fibres (>14% in many regions), which suggests that they are adapted to postural activities. Regional variations in the relative distributions of fibre types in muscle gastrocnemius may reflect different functional demands placed on this muscle during terrestrial and aquatic locomotion. The predominance of oxidative fibres and capillary densities under 1,000 capillaries mm(-2) in leg muscles is probably a consequence of an adaptation for slow swimming and maintenance of the posture on land rather than for other locomotory capabilities, such as endurance or sprint activities.

Animals↗
PubMedDate not supplied

Hematologic and plasma chemistry values in captive psittacine birds.

Reference values for some hematologic parameters in 19 species and plasma chemical values in 11 species of Psittacine birds, including cockatoos, parrots, amazons, macaws, conures, and lories, were established for use in veterinary medicine. The following parameters were studied: hematocrit, hemoglobin concentration, erythrocyte number, mean corpuscular volume, mean corpuscular hemoglobin, mean corpuscular hemoglobin concentration, erythrocyte dimensions, leukocyte number and differential leukocyte count, glucose, urea, uric acid, cholesterol, triglycerides, creatinine, aspartate aminotransferase, alanine aminotransferase, alkaline phosphatase, creatinine phosphokinase, lactic dehydrogenase, gamma glutamyl transpeptidase, total plasma protein, albumin, globulins, albumin-globulin ratio, sodium, potassium, calcium, magnesium, total phosphorus, chloride, and osmolality. Hematologically, the Psittacine is a very homogeneous avian group, with small differences between species. They are, however, different from other groups of birds.

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