Daniell Cell

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Petr Vanýsek - One of the best experts on this subject based on the ideXlab platform.

  • boosting of the output voltage of a galvanic Cell
    Electrochimica Acta, 2018
    Co-Authors: Karel Lacina, Jakub Sopousek, Petr Skládal, Petr Vanýsek
    Abstract:

    Abstract The output voltage of a galvanic Cell can be increased by insertion of two pairs of anodes and cathodes into a single volume of an electrolyte. The anode from the first pair and the cathode from the second pair are galvanically connected using external wire conductor. Two Cells connected through such short circuit performed as separate units when their spatial separation was sufficient. The output voltage of thus modified Cell increased above the thermodynamic potential of a single Cell, with the increased distance of the second pair, and finally reached double the value of the output voltage of a single Cell after exceeding a characteristic parameter, the saturation distance. Further properties of the system are described on the example of a modified Daniell Cell including tests of diverse types of electrolytes and other experimental conditions. The general nature of the principles was confirmed in an experiment with the Leclanche Cell and linear character of the multiplication of the corresponding output voltage was confirmed with 2, 3 and 4 galvanically short-circuited Cells. All these results lead to the conclusion that this concept is valuable for all types of chemical energy sources (employing an electrolyte) – galvanic Cells, batteries, (bio)fuel and microbial Cells.

Brines Brines Ana - One of the best experts on this subject based on the ideXlab platform.

  • Estudio exploratorio comparativo del conocimiento didáctico del contenido sobre pilas galvánicas de profesores de secundaria en ejercicio y en formación
    2016
    Co-Authors: Brines Brines Ana, Solaz Portolés, Joan Josep, Sanjosé López Vicente
    Abstract:

    In this exploratory study pre-service and in-service high school teachers' pedagogical content knowledge (PCK) in galvanic Cells is assessed. In addition, this knowledge has been related to the instructional approaches they prefer. A written questionnaire, adapted from the Loughran, Mulhall, and Berry's CoRe instrument (2004), considering two different situations (Daniell Cell and simple voltaic Cell), has been used for this purpose. The sample made up of 25 pre-service teachers and 15 in-service teachers. The analysis of the results achieved so far suggest that: a) high school teachers' PCK on galvanic Cells is not a desirable knowledge; b) in-service teachers seems to have a significantly better PCK than pre-service teachers; and c) there seem to be no significant differences in preferred teaching approaches between the two groups of teachers

  • Estudio exploratorio comparativo del conocimiento didáctico del contenido sobre pilas galvánicas de profesores de secundaria en ejercicio y en formación
    'Universitat Autonoma de Barcelona', 2016
    Co-Authors: Brines Brines Ana, Solaz Portolés, Joan Josep, Sanjosé López Vicent
    Abstract:

    En este estudio exploratorio se evalúa el conocimiento didáctico del contenido (CDC) sobre pilas galvánicas de profesores de secundaria en formación y en ejercicio. Además, este conocimiento se ha relacionado con los enfoques de enseñanza que prefieren. Para este propósito, se ha adaptado el instrumento CoRe de Loughran, Mulhall y Berry (2004) considerando dos situaciones: pila Daniell y pila voltaica simple. La muestra se compuso de 25 profesores en formación y de 15 profesores en ejercicio. El análisis de los resultados obtenidos hasta ahora sugiere que, en primer lugar, el CDC de los profesores de secundaria sobre pilas galvánicas no es el deseable; en segundo lugar, el CDC de los profesores en ejercicio parece significativamente mejor que el de los profesores en formación, y finalmente, no se observan diferencias significativas entre ambos grupos de profesores en las metodologías de enseñanza preferidas.En aquest estudi exploratori s'avalua el coneixement didàctic del contingut (CDC) sobre piles galvàniques de professors de secundària en formació i en exercici. A més, aquest coneixement s'ha relacionat amb els enfocaments d'ensenyament que prefereixen. Per a aquest propòsit, s'ha adaptat l'instrument CoRe de Loughran, Mulhall i Berry (2004) considerant dues situacions: pila Daniell i pila voltaica simple. La mostra es va compondre de 25 professors en formació i de 15 professors en exercici. L'anàlisi dels resultats obtinguts fins ara suggereix que, en primer lloc, el CDC dels professors de secundària sobre piles galvàniques no és el desitjable; en segon lloc, el CDC dels professors en exercici sembla significativament millor que el dels professors en formació, i finalment, no s'observen diferències significatives entre tots dos grups de professors en les metodologies d'ensenyament preferides.In this exploratory study pre-service and in-service high school teachers' pedagogical content knowledge (PCK) in galvanic Cells is assessed. In addition, this knowledge has been related to the instructional approaches they prefer. A written questionnaire, adapted from the Loughran, Mulhall, and Berry's CoRe instrument (2004), considering two different situations (Daniell Cell and simple voltaic Cell), has been used for this purpose. The sample made up of 25 pre-service teachers and 15 in-service teachers. The analysis of the results achieved so far suggest that: a) high school teachers' PCK on galvanic Cells is not a desirable knowledge; b) in-service teachers seems to have a significantly better PCK than pre-service teachers; and c) there seem to be no significant differences in preferred teaching approaches between the two groups of teachers

  • A comparative exploratory study of pre-service and in-service high school teachers’ pedagogical content knowledge in galvanic Cells
    Universitat de València, 2016
    Co-Authors: Brines Brines Ana, Solaz-portolés Joan, Sanjosé López Vicent
    Abstract:

    En este estudio exploratorio se evalúa el conocimiento didáctico del contenido (CDC) sobre pilas galvánicas de profesores de secundaria en formación y en ejercicio. Además, este conocimiento se ha relacionado con los enfoques de enseñanza que prefieren. Para este propósito, se ha adaptado el instrumento CoRe de Loughran, Mulhall y Berry (2004) considerando dos situaciones: pila Daniell y pila voltaica simple. La muestra se compuso de 25 profesores en formación y de 15 profesores en ejercicio. El análisis de los resultados obtenidos hasta ahora sugiere que, en primer lugar, el CDC de los profesores de secundaria sobre pilas galvánicas no es el deseable; en segundo lugar, el CDC de los profesores en ejercicio parece significativamente mejor que el de los profesores en formación, y finalmente, no se observan diferencias significativas entre ambos grupos de profesores en las metodologías de enseñanza preferidas.En aquest estudi exploratori s'avalua el coneixement didàctic del contingut (CDC) sobre piles galvàniques de professors de secundària en formació i en exercici. A més, aquest coneixement s'ha relacionat amb els enfocaments d'ensenyament que prefereixen. Per a aquest propòsit, s'ha adaptat l'instrument CoRe de Loughran, Mulhall i Berry (2004) considerant dues situacions: pila Daniell i pila voltaica simple. La mostra es va compondre de 25 professors en formació i de 15 professors en exercici. L'anàlisi dels resultats obtinguts fins ara suggereix que, en primer lloc, el CDC dels professors de secundària sobre piles galvàniques no és el desitjable; en segon lloc, el CDC dels professors en exercici sembla significativament millor que el dels professors en formació, i finalment, no s'observen diferències significatives entre tots dos grups de professors en les metodologies d'ensenyament preferides.In this exploratory study pre-service and in-service high school teachers’ pedagogical content knowledge (PCK) in galvanic Cells is assessed. In addition, this knowledge has been related to the instructional approaches they prefer. A written questionnaire, adapted from the Loughran, Mulhall, and Berry’s CoRe instrument (2004), considering two different situations (Daniell Cell and simple voltaic Cell), has been used for this purpose. The sample made up of 25 pre-service teachers and 15 in-service teachers. The analysis of the results achieved so far suggest that: a) high school teachers’ PCK on galvanic Cells is not a desirable knowledge; b) in-service teachers seems to have a significantly better PCK than pre-service teachers; and c) there seem to be no significant differences in preferred teaching approaches between the two groups of teachers

Sanjosé López Vicent - One of the best experts on this subject based on the ideXlab platform.

  • Estudio exploratorio comparativo del conocimiento didáctico del contenido sobre pilas galvánicas de profesores de secundaria en ejercicio y en formación
    'Universitat Autonoma de Barcelona', 2016
    Co-Authors: Brines Brines Ana, Solaz Portolés, Joan Josep, Sanjosé López Vicent
    Abstract:

    En este estudio exploratorio se evalúa el conocimiento didáctico del contenido (CDC) sobre pilas galvánicas de profesores de secundaria en formación y en ejercicio. Además, este conocimiento se ha relacionado con los enfoques de enseñanza que prefieren. Para este propósito, se ha adaptado el instrumento CoRe de Loughran, Mulhall y Berry (2004) considerando dos situaciones: pila Daniell y pila voltaica simple. La muestra se compuso de 25 profesores en formación y de 15 profesores en ejercicio. El análisis de los resultados obtenidos hasta ahora sugiere que, en primer lugar, el CDC de los profesores de secundaria sobre pilas galvánicas no es el deseable; en segundo lugar, el CDC de los profesores en ejercicio parece significativamente mejor que el de los profesores en formación, y finalmente, no se observan diferencias significativas entre ambos grupos de profesores en las metodologías de enseñanza preferidas.En aquest estudi exploratori s'avalua el coneixement didàctic del contingut (CDC) sobre piles galvàniques de professors de secundària en formació i en exercici. A més, aquest coneixement s'ha relacionat amb els enfocaments d'ensenyament que prefereixen. Per a aquest propòsit, s'ha adaptat l'instrument CoRe de Loughran, Mulhall i Berry (2004) considerant dues situacions: pila Daniell i pila voltaica simple. La mostra es va compondre de 25 professors en formació i de 15 professors en exercici. L'anàlisi dels resultats obtinguts fins ara suggereix que, en primer lloc, el CDC dels professors de secundària sobre piles galvàniques no és el desitjable; en segon lloc, el CDC dels professors en exercici sembla significativament millor que el dels professors en formació, i finalment, no s'observen diferències significatives entre tots dos grups de professors en les metodologies d'ensenyament preferides.In this exploratory study pre-service and in-service high school teachers' pedagogical content knowledge (PCK) in galvanic Cells is assessed. In addition, this knowledge has been related to the instructional approaches they prefer. A written questionnaire, adapted from the Loughran, Mulhall, and Berry's CoRe instrument (2004), considering two different situations (Daniell Cell and simple voltaic Cell), has been used for this purpose. The sample made up of 25 pre-service teachers and 15 in-service teachers. The analysis of the results achieved so far suggest that: a) high school teachers' PCK on galvanic Cells is not a desirable knowledge; b) in-service teachers seems to have a significantly better PCK than pre-service teachers; and c) there seem to be no significant differences in preferred teaching approaches between the two groups of teachers

  • A comparative exploratory study of pre-service and in-service high school teachers’ pedagogical content knowledge in galvanic Cells
    Universitat de València, 2016
    Co-Authors: Brines Brines Ana, Solaz-portolés Joan, Sanjosé López Vicent
    Abstract:

    En este estudio exploratorio se evalúa el conocimiento didáctico del contenido (CDC) sobre pilas galvánicas de profesores de secundaria en formación y en ejercicio. Además, este conocimiento se ha relacionado con los enfoques de enseñanza que prefieren. Para este propósito, se ha adaptado el instrumento CoRe de Loughran, Mulhall y Berry (2004) considerando dos situaciones: pila Daniell y pila voltaica simple. La muestra se compuso de 25 profesores en formación y de 15 profesores en ejercicio. El análisis de los resultados obtenidos hasta ahora sugiere que, en primer lugar, el CDC de los profesores de secundaria sobre pilas galvánicas no es el deseable; en segundo lugar, el CDC de los profesores en ejercicio parece significativamente mejor que el de los profesores en formación, y finalmente, no se observan diferencias significativas entre ambos grupos de profesores en las metodologías de enseñanza preferidas.En aquest estudi exploratori s'avalua el coneixement didàctic del contingut (CDC) sobre piles galvàniques de professors de secundària en formació i en exercici. A més, aquest coneixement s'ha relacionat amb els enfocaments d'ensenyament que prefereixen. Per a aquest propòsit, s'ha adaptat l'instrument CoRe de Loughran, Mulhall i Berry (2004) considerant dues situacions: pila Daniell i pila voltaica simple. La mostra es va compondre de 25 professors en formació i de 15 professors en exercici. L'anàlisi dels resultats obtinguts fins ara suggereix que, en primer lloc, el CDC dels professors de secundària sobre piles galvàniques no és el desitjable; en segon lloc, el CDC dels professors en exercici sembla significativament millor que el dels professors en formació, i finalment, no s'observen diferències significatives entre tots dos grups de professors en les metodologies d'ensenyament preferides.In this exploratory study pre-service and in-service high school teachers’ pedagogical content knowledge (PCK) in galvanic Cells is assessed. In addition, this knowledge has been related to the instructional approaches they prefer. A written questionnaire, adapted from the Loughran, Mulhall, and Berry’s CoRe instrument (2004), considering two different situations (Daniell Cell and simple voltaic Cell), has been used for this purpose. The sample made up of 25 pre-service teachers and 15 in-service teachers. The analysis of the results achieved so far suggest that: a) high school teachers’ PCK on galvanic Cells is not a desirable knowledge; b) in-service teachers seems to have a significantly better PCK than pre-service teachers; and c) there seem to be no significant differences in preferred teaching approaches between the two groups of teachers

Patricia Virmnond - One of the best experts on this subject based on the ideXlab platform.

  • a qualitative model of Daniell Cell for chemical education
    Lecture Notes in Computer Science, 2004
    Co-Authors: Paulo Salles, Ricardo Gauche, Patricia Virmnond
    Abstract:

    Understanding how students learn chemical concepts has been a great concern for researchers of chemical education, who want to identify the most important misunderstandings and develop strategies to overcome conceptual problems. Qualitative Reasoning has great potential for building conceptual models that can be useful for chemical education. This paper describes a qualitative model for supporting understanding the interaction between chemical reactions and electric current in the Daniell Cell. We discuss the potential of the model for science education of deaf students.

Paulo Salles - One of the best experts on this subject based on the ideXlab platform.

  • A qualitative model of the Daniell Cell for chemical education
    2009
    Co-Authors: Paulo Salles, Ricardo Gauche, Asa Norte, Patrícia Virmond
    Abstract:

    Understanding how students learn chemical concepts has been a great concern for researchers of chemical education. This community is making efforts to identify the most important misunderstandings and develop strategies to overcome conceptual problems. Qualitative Reasoning has great potential for building conceptual models that can be useful for chemical education. This paper describes a qualitative model of the Daniell Cell, to support understanding of interactions between chemical reactions and electric current. The model support explanations about changes in the mass of the electrodes, a bulb attached to the system that goes on and off and about changes in the colour of the cathode solution. Finally, we discuss the potential of qualitative articulate models for science education of deaf people. 1

  • Intelligent Tutoring Systems - A Qualitative Model of Daniell Cell for Chemical Education
    Intelligent Tutoring Systems, 2004
    Co-Authors: Paulo Salles, Ricardo Gauche, Patrícia Virmond
    Abstract:

    Understanding how students learn chemical concepts has been a great concern for researchers of chemical education, who want to identify the most important misunderstandings and develop strategies to overcome conceptual problems. Qualitative Reasoning has great potential for building conceptual models that can be useful for chemical education. This paper describes a qualitative model for supporting understanding the interaction between chemical reactions and electric current in the Daniell Cell. We discuss the potential of the model for science education of deaf students.

  • a qualitative model of Daniell Cell for chemical education
    Lecture Notes in Computer Science, 2004
    Co-Authors: Paulo Salles, Ricardo Gauche, Patricia Virmnond
    Abstract:

    Understanding how students learn chemical concepts has been a great concern for researchers of chemical education, who want to identify the most important misunderstandings and develop strategies to overcome conceptual problems. Qualitative Reasoning has great potential for building conceptual models that can be useful for chemical education. This paper describes a qualitative model for supporting understanding the interaction between chemical reactions and electric current in the Daniell Cell. We discuss the potential of the model for science education of deaf students.