1,740 research outputs found
Emberiza calandra
No full textRecopilación de observaciones de ecología general, anidamiento y cría del triguero (Miliaria calandra, nombrada por el autor como Emberiza calandra) realizadas durante varias salidas a diferentes enclaves de la provincia de Valladolid, Magaz de Pisuerga (Palencia), Toro (Zamora) y Burgos, entre el 7 de julio de 1947 y el 2 de julio de 1948.Compilation of nesting, breeding and general ecology observations of the Corn Bunting (Miliaria calandra, refered as Emberiza calandra by the author) carried out during some trips to different areas of the province of Valladolid, Magaz de Pisuerga (Palencia), Toro (Zamora) and Burgos, between the 7th of July of 1947 and the 2nd of July of 1948
Calandra oryzae
No full text48.Calandra oryzae (Linnaeus). Curculio oryzae Linnaeus, Amoen. Acad. 6: 396, 1763. Curculio frugilegus De Geer, Mem. Ins. 5: 273, 1781. Curculio granarius Stroem (not Linnaeus), Danske Vid. Selsk. Skrift. 2: 256, 1783. Sitophilus oryzae (Linnaeus) Gyllenhal, in Schoenherr's Gen. Spec. Cure. 4: 981, 1837. Cossonus quadriniaculatus Walker, Ann. Mag. Nat. Hist. III, 4: 219, 1859. Sphenophorus quadriguttatus Montrouzier, Soc. Ent. France, Ann. III, 8: 910, 1860. Most of the Guam specimens in the collection belong to the large variety, zea-mais (Motschulsky) and were taken at Agat, Piti, and Merizo; one was swept from grass and two were taken from corn. I understand that formal application is to be made to the International Congress of Nomenclature to stabilize the long used name Calandra in place of TODO TODOPublished as part of Zimmerman, Elwood C., 1942, Curculionidae of Guam, pp. 73-146 in Insects of Guam I, Honolulu, Hawaii :Bernice P. Bishop Museum on page 145, DOI: 10.5281/zenodo.515996
Hepatic synthesis of apolipoprotein AI in rats with nephrotic syndrome. Changes in hepatic mRNA for ApoAI
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Evidence for a GABAergic system in rodent and human testis: Local GABA production and GABA receptors
No full textThe major neurotransmitter of the central nervous system, gamma-aminobutyric acid (GABA), exerts its actions through GABA(A), GABA(B) and GABA(C) receptors. GABA and GABA receptors are, however, also present in several non-neural tissues, including the endocrine organs pituitary, pancreas and testis. In the case of the rat testis, GABA appears to be linked to the regulation of steroid synthesis by Leydig cells via GABA(A) receptors, but neither testicular sources of GABA, nor the precise nature of testicular GABA receptors are fully known. We examined these points in rat, mouse, hamster and human testicular samples. RT-PCR followed by sequencing showed that the GABA-synthesizing enzymes glutamate decarboxylase (GAD) 65 and/or GAD67, as well as the vesicular GABA transporter vesicular inhibitory amino acid transporter (VIAAT/VGAT) are expressed. Testicular GAD in the rat was shown to be functionally active by using a GAD assay, and Western blot analysis confirmed the presence of GAD65 and GAD67. Interstitial cells, most of which are Leydig cells according to their location and morphological characteristics, showed positive immunoreaction for GAD and VIAAT/VGAT proteins. In addition, several GABA(A) receptor subunits (alpha1-3, beta1-3, gamma1-3), as well as GABAB receptor subunits R1 and R2, were detected by RT-PCR. Western blot analysis confirmed the results for GABA(A) receptor subunits beta2/3 in the rat, and immunohistochemistry identified interstitial Leydig cells to possess immunoreactive GABA(A) receptor subunits beta2/3 and alpha1. The presence of GABA(A) receptor subunit alpha1 mRNA in interstitial cells of the rat testis was further shown after laser microdissection followed by RT-PCR analysis. In summary, these results describe molecular details of the components of an intratesticular GABAergic system expressed in the endocrine compartment of rodent and human testes. While the physiological significance of this peripheral neuroendocrine system conserved throughout species remains to be elucidated, its mere presence in humans suggests the possibility that clinically used drugs might be able to interfere with testicular function. Copyright (C) 2003 S. Karger AG, Basel
CHARGE AND ENERGY EXCHANGE BETWEEN A METAL AND A 2-LEVEL PARTICLE IN A METASTABLE STATE
No full textThe interaction with a metal of a two-level particle having two electrons in the triplet configuration has been studied using a time-dependent Newns-Anderson Hamiltonian under the assumption that the intra-atomic Coulomb repulsion terms are large compared to the matrix elements of the metal-particle interaction potential. Using perturbation theory explicit expressions of the transitions amplitudes for the processing occurring to second order in the interaction potential have been derived, thus allowing for the calculation of the spectral function up to fourth order. Results for a model system are presented that emphasize the importance of correlation terms in the various processes
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