GUZMÁN CHOZAS , Matías

1.- Se ha sintetizado por primera vez la ditiosemicarbaz ... 2.- Se han estudiado las propiedades físico-químicas del reactivo. Es un producto amarillo, cristalino, que presenta un punto de fusión de 252-4 ºC, medido en microscopio con platina de Kofler. Los resultados del análisis elemental confirman la fórmula empírica supuesta. 3.- La...

El descubrimiento del vinagre, como muchos otros productos de fermentación (vino, cerveza, pan, etc.), se pierde en la memoria de los tiempos. Este producto, que tiene por origen las bebidas alcohólicas o los productos azucarados, se ha elaborado y consumido ininterrumpidamente desde los tiempos más remotos hasta el presente: sólo...

The trichromatic theory was applied to wines at the end of the 1930s. Trichromatic co‐ordinates, dominant wavelength, purity and luminance were determined. The Munsell system and the Lovibond method, which had industrial applicability, were compared with the simplified methods proposed by the L'office Internationale de la Vigne et du Vin (OIV)....

In the 1930s trade transactions required that the color of wine be more rigidly specified. The wine‐colorimeter was useful with this purpose. Intensity of color was the first property to be considered. From the beginning of this century visual comparisons of wines with standard mixtures of dyes or colored substances (potassium permanganate and...

Se ha llevado a cabo un estudio so­bre algunos componentes caracterís­ticos de vinagres vínicos de origen andaluz. Para ello se han tomado 16 muestras, en las que se ha determi­nado la presencia de ácido tartárico, prolina y componentes volátiles. Se ha hallado un alto grado de concen­tración de los componentes estudia­dos, especialmente en ...

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Adipose tissue is an important source of adipose derived stem cells (ADSCs). These cells have the potential of being used for certain therapies, in which the main objective is to recover the function of a tissue/organ affected by a disease. In order to contribute to repair of the tissue, these cells should be able to survive and carry out their...

Cell therapy with adult stem cells is a new battle front for the control of aging. Before being used for this purpose, we need to answer several basic questions about the biochemistry and physiology of these cells. This paper presents some aspects and preliminary results obtained in our laboratory using stem cells from adipose tissue.