Determinación de Hidroxifeniletanolaminas mediante formación de Ditiocarbamatos de Cobre (II)

A colorimetric method for the assay of hydroxyphenylethanolamines is proposed. The reaction of amines with carbqn disulfide is utilized as a basis for their analysis.Se ha estudiado, por método espectrofotométrico, la posibilidad de valorar hidroxifeniletilaminas haciendo uso de la reacción coloreada que tiene lugar al tratarlas con S2C, para formar el ácido ditiocarbámico, y su posterior complejación con Cu(II)

Determinación de Hidroxifeniletanolaminas mediante formación de Ditiocarbamatos de Cobre (II)

Se ha estudiado, por método espectrofotométrico, la posibilidad de valorar hidroxifeniletilaminas haciendo uso de la reacción coloreada que tiene lugar al tratarlas con S2C, para formar el ácido ditiocarbámico, y su posterior complejación con Cu(II).A colorimetric method for the assay of hydroxyphenylethanolamines is proposed. The reaction of amines with carbqn disulfide is utilized as a basis for their analysis

Estudio oscilopolarográfico de dos derivados 5,4d pirimidínicos

Comentario al manuscrito de Francisco Fernández Navarrete, médico granadino del siglo XVIII, "Carácter de España deducido de los principios fundamentos y consideraciones de su Historia Natural" (1740), localizado en la Real Academia de la Historia de Madrid

Estudio oscilopolarográfico de dos derivados 5,4d pirimidínicos

Se ha estudiado la reducción electroquímica sobre el electrodo de gota de mercurio del 2,6-bis(morfolino)-4-[( Beta -hidroxi-etil)-metil-amino] -pirimido (5,4d)pirimidina(sustancia 1) y 2,4,6, -tris(morfolino )-pirimido(5 ,4d)pirimidina(sustancia I1). Los datos oscilopolarográficos ponen de manifiesto que el producto de la reacción catódica se abosrbe intensamente sobre la superficie del electrodo indicador.It has been studied electrochemical reduction of 2,6-bis(morpholino)-4-[( B-hydroxy-etil)-methylamino] -pyrimido(5,4d) pyrimidine (1) and 2,4,6-tris(morpholino)-pyrimido (5,4d) pyrimidine (I1)

Manihot hunzikeriana Mart. Crov.

Santo PipópublishedVersio

Anatomical study between the correlation of the arcuate eminence and the superior semicircular canal

Objective To study the anatomical correlation between the arcuate eminence and the superior semicircular canal. Material and methods A study of the height of the arcuate eminence was carried out in 295 temporal bones. In addition, 30 temporals with different heights of the arcuate eminence (10 flat, 10 prominent and 10 very prominent) were randomly selected and radiological tests were performed by computed tomography (Pöschl projection) and subsequent dissection by milling until the apex of the superior semicircular canal was found, establishing, with both methods, the anatomical relationship with the arcuate eminence. Results The arcuate eminence was classified as: smooth, when there was no relief (1.7%); flat, measured less than 1 mm (20.3%), prominent, measured between 1 and 2 mm, in (62%), and very prominent, measured above 2 mm (12.6%). The tomographic study (CT) and its subsequent dissection by bone milling showed a direct relationship between the arcuate eminence and the semicircular canal only when it was flat, while the rest of the types corresponded to the presence of pneumatized peri-labyrinthine cells and/or cancellous bone without a direct anatomical relationship with the apex of the superior semicircular canal. Conclusion The correlation between the arcuate eminence and the superior semicircular canal is direct only when it is flat (1 mm), being related to peri-labyrinthine cells and/or cancellous bone when the arcuate eminence is prominent or very prominent

Association between superior semicircular canal dehiscence and other dehiscences in temporal bone

Background: The study of the association between superior semicircular canal and other dehiscences in the temporal bone. Materials and methods: We have studied computed tomography of radiologically diagnosed people with superior or posterior semicircular canal dehiscences, in four health centres. In addition, we have studied one isolated human temporal bone, one skull and one cadaver head belonging to the collection of the Department of Human Anatomy and Histology of the University of Zaragoza that had dehiscence in the superior semicircular canal. Results: The most frequent association that we observed was between superior semicircular canal dehiscence and tegmen tympani dehiscence (37.33%). Three cases (two clinical cases and one isolated temporal bone) showed multiple associated dehiscences (tegmen tympani, mastoid antrum, posterior semicircular canal, internal auditory canal, glenoid cavity, tympanum bone and geniculate ganglion) associated with superior semicircular canal dehiscence Conclusions: When the superior semicircular canal dehiscence is associated to other in the petrous bone (tegmen tympani, mastoid antrum, posterior semicircular canal, internal auditory canal) could be grouped into the same syndrome called "otic capsule syndrome", since they have the same origin and common aetiology (otic capsule)

Estudio culombimétrico de un derivado (5,4d) pirimidopirimidínico

It has been realized the culombimetric analysis of 2,6-bis (morpholino )-4 [( β-hydroxyetil)-methylamino ]-pyrimido (5,4d) pyrimidine in aqueons medium. It 's possible to asign to the first polarographic wave to a reduction process 2H+ + 2e.Se ha realizado el análisis culombimétrico del 2,6-bis (morfolino)-4 [( β -hidroxietil)-metilamino] -pirimido (5 ,4d) pirimidina en medio acuoso. Es posible adscribir la primera onda polarográfica a un proceso de reducción 2H+ + 2e