En las investigaciones educativas basadas en una metodolog??a cuantitativa, el an??lisis de datos... more En las investigaciones educativas basadas en una metodolog??a cuantitativa, el an??lisis de datos se lleva a cabo, generalmente, dentro del marco de la inferencia cl??sica frecuencial, principalmente a partir del contraste estad??stico de hip??tesis. En los ??ltimos a??os se ha se??alado el uso e interpretaci??n incorrecta de los contrastes estad??sticos. En este trabajo analizamos algunos de los errores m??s frecuentes en la inferencia estad??stica y damos algunas sugerencias para superarlos.
Patterns of neuronal differentiation and axon outgrowth were examined in regenerated neural tissu... more Patterns of neuronal differentiation and axon outgrowth were examined in regenerated neural tissue of the hindbrain of the chicken embryo. Specific regions of the hindbrain neural tube corresponding to identified rhom-bomeres were selectively removed unilaterally by micro-surgery. Of the embryos that survived, about 35% exhibited regulative regeneration, wherein the missing hemi-rhombomere was reconstituted to normal size and morphology through compensatory proliferation and migration from adjacent tissue. The capacity for regener-ation depended on the embryonic stage at which the ablation was performed and on whether the midline floor plate was included in the ablation. Ablations performed prior to the formation of morphologically overt rhom-bomere boundaries led to significantly lower frequencies of regulative regeneration than ablations performed after the formation of boundaries. Ablations that included the floor plate led to significantly lower frequencies of regulative regener...
Economia Espanola Veinte Anos En La Union Europea Ponencias Presentadas En Las Xvii Xviii Xix Y Xx Jornadas De Alicante Sobre La Economia Espanola 2006 Isbn 84 470 2682 5 Pags 159 188, 2006
The object of this work has been to show neuronal typology and stratification of the optic tectum... more The object of this work has been to show neuronal typology and stratification of the optic tectum in Gallotia galloti adult specimens so as to have a basic model for the neuronal genesis study. As methodology Nissl and Golgi-Stensaas technique were employed. Six strata have been identified that include 14 layers where the neuronal types can be included, poligonals, bipolar, monopolar and stellate types. The stratification of the optic tectum in the 14 layers is corroborated in Reptiles, a fact which is maintained in birds, and is reduced in amphibians, urodels, and fish here the reptil optic tectum presentes an extraordinary importance in the study of the auditive and visual vias in phylogeny.
Development of neurons in the area triangularis of Gallotia galloti was investigated in Golgi‐imp... more Development of neurons in the area triangularis of Gallotia galloti was investigated in Golgi‐impregnated brain tissue. Four major neuronal types present in adults were found to originate from two migratory neuroblast types, which were followed from embryonic stage S.32. One type has a thick main medial process, whereas the second type has a long main lateral process. As they migrate toward the periphery of the nucleus, morphological characteristics of maturation appear, including growth cones, filopodia, and outgrowth of axons. Neuroblasts with a main lateral process differentiate into two immature neuronal types, bipolars and pyramidals, observed at S.33 and thereafter. The neuroblasts with a main medial process undergo some somatic translocation through a transitory tangential shaft. Then they develop into monopolar immature forms with a long varicose medial, process, appearing from S.36. onward. Immature bipolar neurons do not experience great changes in their dendritic arboriza...
In a Golgi study of the area triangularis (AT), a rostral nucleus of the ventral thalamus of Gall... more In a Golgi study of the area triangularis (AT), a rostral nucleus of the ventral thalamus of Gallotia galloti, we have identified four major neuronal types on the basis of their morphological characteristics: medium‐sized fusiforms with two processes, medium‐sized fusiforms with three or four processes, small bipolars, and small and medium‐sized multipolars. These neurons are characterized by a simple morphology and radial arrangement. Cell size varies from small to medium, and all axons project laterally. These characteristics distinguish AT neurons from those of neighboring nuclei. In addition, we found some evidence of differential topographic distribution of each neuronal type within the nucleus. Medium‐sized fusiform neurons with two processes are located in the most ventral part, where they constitute the ventral nuclear limit. Small multipolar neurons prevail in the dorsal and ventromedial parts, and in the rest of the nucleus medium‐sized neurons, including both fusiform wit...
Using Golgi techniques we have studied neuronal cell types in the anterior dorsal ventricular rid... more Using Golgi techniques we have studied neuronal cell types in the anterior dorsal ventricular ridge (ADVR) of the adult lizard Gallotia galloti. Multipolar, bitufted, and juxtaependymal neuronal forms were found. The multipolar and bitufted neurons are present in both the periventricular and central ADVR zones. Multipolar neurons can be subdivided into multipolar neurons with polygonal somata and four to six main dendritic trunks and multipolar neurons with pyramidal somata and three or more dendritic trunks. The former are the cells most frequently impregnated in the ADVR. In the population of bitufted neurons, we distinguish subtypes I, II, and III according to the number of dendritic trunks that emerge from the somata. Juxtaependymal neurons are restricted to a cell‐poor zone, adjacent to ependymal cells. Their dendrites either are orientated parallel to the ventricular surface or extend into the periventricular zone. The dendrites of ADVR neurons have pedunculated spines with kn...
The projection pattern of the ventral thalamic reticular nucleus onto the dorsal thalamus was stu... more The projection pattern of the ventral thalamic reticular nucleus onto the dorsal thalamus was studied in the lizard Gallotia gallotiusing in vitro horseradish peroxidase and fluorescent carbocyanine labelling techniques. Localized label deposits at three dorsoventrally spaced sites in the dorsal thalamus elicited retrograde transport into separate, though partly overlapping, medial, dorsolateral and ventrolateral sectors within an extended cytoarchitectonic complex which may be globally identifiable as the reticular nucleus. Neurons found in the dorsolateral and ventrolateral sectors mainly corresponded to the cell group named nucleus ventromedialis (or nucleus of the dorsal supraoptic decussation) in the literature, whereas neurons labelled in the medial sector corresponded to the so‐called dorsal hypothalamic nucleus. Sparser cells appear labelled in the superficially placed nucleus suprapeduncularis. Thalamotelencephalic fibers arising from the injected dorsal thalamic nuclei als...
The reaction of ethanolic solutions of CuX2 (X=NO3 −, ClO4 −), with bidentate amine, 2,2′-bipyrid... more The reaction of ethanolic solutions of CuX2 (X=NO3 −, ClO4 −), with bidentate amine, 2,2′-bipyridyl (bipy) and ammonium thiocyanate, leads to the high-yield formation of {catena-[Cu(bipy)(μN,S-NCS)2]} (1) and [Cu(NCS)(bipy)2]ClO4 · 1/2CH3CN (2). The crystal structure of 1 and 2 were determined. Complex 1 crystallises in the monoclinic system, space group C2/c with a=8.125(4) Å, b=15.557(6) Å, c=10.536(3) Å, β=95.32(3)° and Z=4. The crystal structure
The crystal structure of the first three heterotetranuclear complexes [Cu (oxpn) Ni (μ-NCS)(H2O)(... more The crystal structure of the first three heterotetranuclear complexes [Cu (oxpn) Ni (μ-NCS)(H2O)(tmen)] 2 (PF6) 2 (1),[Cu (oxpn) Ni (μ-NCS)(H2O)(tmen)] 2 (ClO4) 2 (2), and [Cu (oxpn) Ni (μ-NCS)(H2O)(trimen)] 2 (ClO4) 2 (3) is reported. They have analogous ...
The reaction of Ln(NO(3))(3).aq with K(3)[Fe(CN)(6)] or K(3)[Co(CN)(6)] and 2,2&a... more The reaction of Ln(NO(3))(3).aq with K(3)[Fe(CN)(6)] or K(3)[Co(CN)(6)] and 2,2'-bipyridine in water led to five one-dimensional complexes: trans-[M(CN)(4)(mu-CN)(2)Ln(H(2)O)(4) (bpy)](n)().XnH(2)O.1.5nbpy (M = Fe(3+) or Co(3+); Ln = Sm(3+), Gd(3+), or Yb(3+); X = 4 or 5). The structures for [Fe(3)(+)-Sm(3+)] (1), [Fe(3)(+)-Gd(3+)] (2), [Fe(3)(+)-Yb(3+)] (3), [Co(3)(+)-Gd(3+)] (4), and [Co(3)(+)-Yb(3+)] (5) have been solved; they crystallize in the triclinic space P1 and are isomorphous. The [Fe(3+)-Sm(3+)] complex is a ferrimagnet, its magnetic studies suggesting the onset of weak ferromagnetic 3-D ordering at 3.5 K. The [Fe(3+)-Gd(3+)] interaction is weakly antiferromagnetic. The isotropic nature of Gd(3+) allowed us to evaluate the exchange interaction (J = 0.77 cm(-)(1)).
En las investigaciones educativas basadas en una metodolog??a cuantitativa, el an??lisis de datos... more En las investigaciones educativas basadas en una metodolog??a cuantitativa, el an??lisis de datos se lleva a cabo, generalmente, dentro del marco de la inferencia cl??sica frecuencial, principalmente a partir del contraste estad??stico de hip??tesis. En los ??ltimos a??os se ha se??alado el uso e interpretaci??n incorrecta de los contrastes estad??sticos. En este trabajo analizamos algunos de los errores m??s frecuentes en la inferencia estad??stica y damos algunas sugerencias para superarlos.
Patterns of neuronal differentiation and axon outgrowth were examined in regenerated neural tissu... more Patterns of neuronal differentiation and axon outgrowth were examined in regenerated neural tissue of the hindbrain of the chicken embryo. Specific regions of the hindbrain neural tube corresponding to identified rhom-bomeres were selectively removed unilaterally by micro-surgery. Of the embryos that survived, about 35% exhibited regulative regeneration, wherein the missing hemi-rhombomere was reconstituted to normal size and morphology through compensatory proliferation and migration from adjacent tissue. The capacity for regener-ation depended on the embryonic stage at which the ablation was performed and on whether the midline floor plate was included in the ablation. Ablations performed prior to the formation of morphologically overt rhom-bomere boundaries led to significantly lower frequencies of regulative regeneration than ablations performed after the formation of boundaries. Ablations that included the floor plate led to significantly lower frequencies of regulative regener...
Economia Espanola Veinte Anos En La Union Europea Ponencias Presentadas En Las Xvii Xviii Xix Y Xx Jornadas De Alicante Sobre La Economia Espanola 2006 Isbn 84 470 2682 5 Pags 159 188, 2006
The object of this work has been to show neuronal typology and stratification of the optic tectum... more The object of this work has been to show neuronal typology and stratification of the optic tectum in Gallotia galloti adult specimens so as to have a basic model for the neuronal genesis study. As methodology Nissl and Golgi-Stensaas technique were employed. Six strata have been identified that include 14 layers where the neuronal types can be included, poligonals, bipolar, monopolar and stellate types. The stratification of the optic tectum in the 14 layers is corroborated in Reptiles, a fact which is maintained in birds, and is reduced in amphibians, urodels, and fish here the reptil optic tectum presentes an extraordinary importance in the study of the auditive and visual vias in phylogeny.
Development of neurons in the area triangularis of Gallotia galloti was investigated in Golgi‐imp... more Development of neurons in the area triangularis of Gallotia galloti was investigated in Golgi‐impregnated brain tissue. Four major neuronal types present in adults were found to originate from two migratory neuroblast types, which were followed from embryonic stage S.32. One type has a thick main medial process, whereas the second type has a long main lateral process. As they migrate toward the periphery of the nucleus, morphological characteristics of maturation appear, including growth cones, filopodia, and outgrowth of axons. Neuroblasts with a main lateral process differentiate into two immature neuronal types, bipolars and pyramidals, observed at S.33 and thereafter. The neuroblasts with a main medial process undergo some somatic translocation through a transitory tangential shaft. Then they develop into monopolar immature forms with a long varicose medial, process, appearing from S.36. onward. Immature bipolar neurons do not experience great changes in their dendritic arboriza...
In a Golgi study of the area triangularis (AT), a rostral nucleus of the ventral thalamus of Gall... more In a Golgi study of the area triangularis (AT), a rostral nucleus of the ventral thalamus of Gallotia galloti, we have identified four major neuronal types on the basis of their morphological characteristics: medium‐sized fusiforms with two processes, medium‐sized fusiforms with three or four processes, small bipolars, and small and medium‐sized multipolars. These neurons are characterized by a simple morphology and radial arrangement. Cell size varies from small to medium, and all axons project laterally. These characteristics distinguish AT neurons from those of neighboring nuclei. In addition, we found some evidence of differential topographic distribution of each neuronal type within the nucleus. Medium‐sized fusiform neurons with two processes are located in the most ventral part, where they constitute the ventral nuclear limit. Small multipolar neurons prevail in the dorsal and ventromedial parts, and in the rest of the nucleus medium‐sized neurons, including both fusiform wit...
Using Golgi techniques we have studied neuronal cell types in the anterior dorsal ventricular rid... more Using Golgi techniques we have studied neuronal cell types in the anterior dorsal ventricular ridge (ADVR) of the adult lizard Gallotia galloti. Multipolar, bitufted, and juxtaependymal neuronal forms were found. The multipolar and bitufted neurons are present in both the periventricular and central ADVR zones. Multipolar neurons can be subdivided into multipolar neurons with polygonal somata and four to six main dendritic trunks and multipolar neurons with pyramidal somata and three or more dendritic trunks. The former are the cells most frequently impregnated in the ADVR. In the population of bitufted neurons, we distinguish subtypes I, II, and III according to the number of dendritic trunks that emerge from the somata. Juxtaependymal neurons are restricted to a cell‐poor zone, adjacent to ependymal cells. Their dendrites either are orientated parallel to the ventricular surface or extend into the periventricular zone. The dendrites of ADVR neurons have pedunculated spines with kn...
The projection pattern of the ventral thalamic reticular nucleus onto the dorsal thalamus was stu... more The projection pattern of the ventral thalamic reticular nucleus onto the dorsal thalamus was studied in the lizard Gallotia gallotiusing in vitro horseradish peroxidase and fluorescent carbocyanine labelling techniques. Localized label deposits at three dorsoventrally spaced sites in the dorsal thalamus elicited retrograde transport into separate, though partly overlapping, medial, dorsolateral and ventrolateral sectors within an extended cytoarchitectonic complex which may be globally identifiable as the reticular nucleus. Neurons found in the dorsolateral and ventrolateral sectors mainly corresponded to the cell group named nucleus ventromedialis (or nucleus of the dorsal supraoptic decussation) in the literature, whereas neurons labelled in the medial sector corresponded to the so‐called dorsal hypothalamic nucleus. Sparser cells appear labelled in the superficially placed nucleus suprapeduncularis. Thalamotelencephalic fibers arising from the injected dorsal thalamic nuclei als...
The reaction of ethanolic solutions of CuX2 (X=NO3 −, ClO4 −), with bidentate amine, 2,2′-bipyrid... more The reaction of ethanolic solutions of CuX2 (X=NO3 −, ClO4 −), with bidentate amine, 2,2′-bipyridyl (bipy) and ammonium thiocyanate, leads to the high-yield formation of {catena-[Cu(bipy)(μN,S-NCS)2]} (1) and [Cu(NCS)(bipy)2]ClO4 · 1/2CH3CN (2). The crystal structure of 1 and 2 were determined. Complex 1 crystallises in the monoclinic system, space group C2/c with a=8.125(4) Å, b=15.557(6) Å, c=10.536(3) Å, β=95.32(3)° and Z=4. The crystal structure
The crystal structure of the first three heterotetranuclear complexes [Cu (oxpn) Ni (μ-NCS)(H2O)(... more The crystal structure of the first three heterotetranuclear complexes [Cu (oxpn) Ni (μ-NCS)(H2O)(tmen)] 2 (PF6) 2 (1),[Cu (oxpn) Ni (μ-NCS)(H2O)(tmen)] 2 (ClO4) 2 (2), and [Cu (oxpn) Ni (μ-NCS)(H2O)(trimen)] 2 (ClO4) 2 (3) is reported. They have analogous ...
The reaction of Ln(NO(3))(3).aq with K(3)[Fe(CN)(6)] or K(3)[Co(CN)(6)] and 2,2&a... more The reaction of Ln(NO(3))(3).aq with K(3)[Fe(CN)(6)] or K(3)[Co(CN)(6)] and 2,2'-bipyridine in water led to five one-dimensional complexes: trans-[M(CN)(4)(mu-CN)(2)Ln(H(2)O)(4) (bpy)](n)().XnH(2)O.1.5nbpy (M = Fe(3+) or Co(3+); Ln = Sm(3+), Gd(3+), or Yb(3+); X = 4 or 5). The structures for [Fe(3)(+)-Sm(3+)] (1), [Fe(3)(+)-Gd(3+)] (2), [Fe(3)(+)-Yb(3+)] (3), [Co(3)(+)-Gd(3+)] (4), and [Co(3)(+)-Yb(3+)] (5) have been solved; they crystallize in the triclinic space P1 and are isomorphous. The [Fe(3+)-Sm(3+)] complex is a ferrimagnet, its magnetic studies suggesting the onset of weak ferromagnetic 3-D ordering at 3.5 K. The [Fe(3+)-Gd(3+)] interaction is weakly antiferromagnetic. The isotropic nature of Gd(3+) allowed us to evaluate the exchange interaction (J = 0.77 cm(-)(1)).
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