Algunos nuevos métodos pedobiológicos

The rhizosphere soil of six different plant species grown in a factorial combination with four different types of soil was analyzed to gain information about the amount of organic metabolites and their origin in the rhizosphere. Amino-acids, sugars, carbon dioxide evolution and some enzyme acti vities were estimated, The results were compared using various statistical methods such as multiple correlation, factor analysis, principal componenl analysis, and cluster analysis. The amounts of sugars, amino-acids, and the enzyme-activities of some metabolites behave in an interdependent way, suggesting a very close interrelationship with the involved organisms. While in most cases the soil was the dominating factor in the combinatinn, sometimes the plant played a major role. Some combinations suggested a very especial symbiosis of the involved organisms. Emphasis is made on the importance of such physiological investigations as a diagnostic tool for the assessment of the biological state of various natural and agricultural soils.El suelo rizosférico de seis especies diferentes de plantas que crecieron en una combinación factorial can cuatro c1ases diversas de suelos, fue analizado a fin de obtener información sabré la cantidad de metabolitos orgánicos y su origen en la rizosfera. Se determinaron cuantitativamente los aminoácidos, los azucares y la evolución del dióxido de carbona, así como algunas actividades e enzimáticas. Los resultados fueron comparados utilizando varios métodos estadísticos tales como correlación múltiple, análisis factorial, análisis de componentes principales y análisis de grupos. Las cantidades de azucares, aminoácidos y las actividades  enzimáticas de ciertos metabolitos se comportan interdependientemente, sugiriendo una relación muy intima con los organismos implicados. Mientras en la mayoría de los casos el suelo fue el factor dominante en la combinación, en otras pocas ocasiones fueron las plantas las que jugaron un papel preponderante. Algunas combinaciones sugirieron una simbiosis muy especial de los organismos implicados. Se hace énfasis en la importancia de este tipo de investigaciones fisiológicas como herramienta de diagnóstico para la determinación del estado biológico de suelos naturales y agrícolas

Selection of reference system elements in the model of PGE - Product generation engineering: Method for the integration of customer and user satisfaction in product planning

In the development of mechatronic systems, it is important to differentiate the products to be developed from those of the competitors, but also from the own product generations already available on the market. However, there are uncertainties regarding the correct features to be differentiated from the customer and user perspective and how these features should be designed. Nevertheless, despite the high impact, decisions must be taken early in the development process. Within this publication, a method to support in this respect was derived based on the findings of the Model of PGE - Product Generation Engineering and the Kano-Model. Therefore, experienceable product features and reference system elements as characteristics of these are evaluated according to the Kano-Model and thus made comparable with regard to the customers and user satisfaction. The objective is to select the product features to be differentiated and the corresponding reference system elements in such a way that a desired level of customer and user satisfaction is achieved. In order to evaluate the method, it was applied in a real development project. It was found that the application of the method led to a reduction of the existing uncertainty

Algunos nuevos métodos pedobiológicos

The rhizosphere soil of six different plant species grown in a factorial combination with four different types of soil was analyzed to gain information about the amount of organic metabolites and their origin in the rhizosphere. Amino-acids, sugars, carbon dioxide evolution and some enzyme acti vities were estimated, The results were compared using various statistical methods such as multiple correlation, factor analysis, principal componenl analysis, and cluster analysis. The amounts of sugars, amino-acids, and the enzyme-activities of some metabolites behave in an interdependent way, suggesting a very close interrelationship with the involved organisms. While in most cases the soil was the dominating factor in the combinatinn, sometimes the plant played a major role. Some combinations suggested a very especial symbiosis of the involved organisms. Emphasis is made on the importance of such physiological investigations as a diagnostic tool for the assessment of the biological state of various natural and agricultural soils