73 research outputs found

    Nutritional impact on brain function: Food for thought, emotions and wellbeing

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    The rate of cognitive and emotional dysfunction is increasing in the modern society, therefore nutritional impact on the brain functioning is receiving higher attention in science and practice. In order to summarize the latest scientific knowledge concerning nutritional impact on the nervous system and particularly on the brain functioning we performed literature search and analysis. Increasing number of scientific data show that macronutrients and micronutrients (vitamins and minerals) affect multiple brain processes through control of diverse mechanisms as: synaptic transmission, neurotransmitter pathways, signal-transduction pathways, membrane fluidity, epigenetic changes, etc. Impact of specific macronutrients and micronutrients in brain functioning and their food source is presented in details. We believe that these data might be of interest to wide spectrum of professionals as: physicians, nutritionists, psychologists, neuroscientists etc

    Nutritional impact on brain function: Food for thought, emotions and wellbeing

    Get PDF
    The rate of cognitive and emotional dysfunction is increasing in the modern society, therefore nutritional impact on the brain functioning is receiving higher attention in science and practice. In order to summarize the latest scientific knowledge concerning nutritional impact on the nervous system and particularly on the brain functioning we performed literature search and analysis. Increasing number of scientific data show that macronutrients and micronutrients (vitamins and minerals) affect multiple brain processes through control of diverse mechanisms as: synaptic transmission, neurotransmitter pathways, signal-transduction pathways, membrane fluidity, epigenetic changes, etc. Impact of specific macronutrients and micronutrients in brain functioning and their food source is presented in details. We believe that these data might be of interest to wide spectrum of professionals as: physicians, nutritionists, psychologists, neuroscientists etc

    Nutritional impact on brain function: Food for thought, emotions and wellbeing

    Get PDF
    The rate of cognitive and emotional dysfunction is increasing in the modern society, therefore nutritional impact on the brain functioning is receiving higher attention in science and practice. In order to summarize the latest scientific knowledge concerning nutritional impact on the nervous system and particularly on the brain functioning we performed literature search and analysis. Increasing number of scientific data show that macronutrients and micronutrients (vitamins and minerals) affect multiple brain processes through control of diverse mechanisms as: synaptic transmission, neurotransmitter pathways, signal-transduction pathways, membrane fluidity, epigenetic changes, etc. Impact of specific macronutrients and micronutrients in brain functioning and their food source is presented in details. We believe that these data might be of interest to wide spectrum of professionals as: physicians, nutritionists, psychologists, neuroscientists etc

    Nutritional impact on brain function: Food for thought, emotions and wellbeing

    Get PDF
    The rate of cognitive and emotional dysfunction is increasing in the modern society, therefore nutritional impact on the brain functioning is receiving higher attention in science and practice. In order to summarize the latest scientific knowledge concerning nutritional impact on the nervous system and particularly on the brain functioning we performed literature search and analysis. Increasing number of scientific data show that macronutrients and micronutrients (vitamins and minerals) affect multiple brain processes through control of diverse mechanisms as: synaptic transmission, neurotransmitter pathways, signal-transduction pathways, membrane fluidity, epigenetic changes, etc. Impact of specific macronutrients and micronutrients in brain functioning and their food source is presented in details. We believe that these data might be of interest to wide spectrum of professionals as: physicians, nutritionists, psychologists, neuroscientists etc

    Attention as a precondition of rehabilitation

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    Introduction: Attention, as a function, is described as a significant predictor of recovery after brain injury. It is also a necessary precondition for the patient’s participation in the further course of rehabilitation. Attention is defined as the ability to direct and maintain psychic energy to a selected number of relevant stimuli. The main features of attention are tenacity and vigilance. Tenacity means the ability to retain psychic energy for as long as a certain situation requires. For example, solving a specific task or multiple tasks. Vigilance is a feature of attention that psychic energy is quickly transferred from one information or stimulus to another. Aim: The aim of this study was to examine the influence of an experimental factor on attention recovery in people with brain injuries. Method: Two groups of subjects were formed, experimental and control. The experimental group consisted of subjects with brain injuries and the control group included their healthy peers. The subjects in both groups were aged 15-20 years. Subjects of the experimental group were subjected to the experimental factor. Results: The results of the study tested with easy-R software system (EZR, version 1.41.64-bit) showed highly statistically significant differences (p<.01) between the experimental and control groups. Conclusion: The application of the experimental factor contributed to the recovery of attention functions in subjects with brain injuries

    Attention as a precondition of rehabilitation

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    Introduction: Attention, as a function, is described as a significant predictor of recovery after brain injury. It is also a necessary precondition for the patient’s participation in the further course of rehabilitation. Attention is defined as the ability to direct and maintain psychic energy to a selected number of relevant stimuli. The main features of attention are tenacity and vigilance. Tenacity means the ability to retain psychic energy for as long as a certain situation requires. For example, solving a specific task or multiple tasks. Vigilance is a feature of attention that psychic energy is quickly transferred from one information or stimulus to another. Aim: The aim of this study was to examine the influence of an experimental factor on attention recovery in people with brain injuries. Method: Two groups of subjects were formed, experimental and control. The experimental group consisted of subjects with brain injuries and the control group included their healthy peers. The subjects in both groups were aged 15-20 years. Subjects of the experimental group were subjected to the experimental factor. Results: The results of the study tested with easy-R software system (EZR, version 1.41.64-bit) showed highly statistically significant differences (p<.01) between the experimental and control groups. Conclusion: The application of the experimental factor contributed to the recovery of attention functions in subjects with brain injuries

    ΠŸΠΎΡ‚Π΅Π½Ρ†ΠΈΡ˜Π°Π»Π½Π° ΠΏΡ€ΠΈΠΌΠ΅Π½Π° гСнСтски ΠΌΠΎΠ΄ΠΈΡ„ΠΈΠΊΠΎΠ²Π°Π½ΠΈΡ… ΠΎΡ€Π³Π°Π½ΠΈΠ·Π°ΠΌΠ° Ρƒ Π·Π°ΡˆΡ‚ΠΈΡ‚ΠΈ ΠΆΠΈΠ²ΠΎΡ‚Π½Π΅ срСдинС

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    OΠ΄ свог ΡƒΡ‚Π΅ΠΌΠ΅Ρ™Π΅ΡšΠ° Ρƒ сСдамдСсСтим Π³ΠΎΠ΄ΠΈΠ½Π°ΠΌΠ° двадСсСтог Π²Π΅ΠΊΠ° Π΄ΠΎ данас, Ρ‚Π΅Ρ…Π½ΠΎΠ»ΠΎΠ³ΠΈΡ˜Π° Π³Π΅Π½Π΅Ρ‚ΠΈΡ‡ΠΊΠΎΠ³ ΠΈΠ½ΠΆΠ΅ΡšΠ΅Ρ€ΡΡ‚Π²Π° ΠΎΡ‚Π²ΠΎΡ€ΠΈΠ»Π° јС ΡˆΠΈΡ€ΠΎΠΊ Π½ΠΈΠ· ΠΏΡ€ΠΈΠΌΠ΅Π½Π° ΠΏΡ€Π΅ свСга Ρƒ Π½Π°ΡƒΡ†ΠΈ, ΠΏΡ€ΠΎΠΈΠ·Π²ΠΎΠ΄ΡšΠΈ Π»Π΅ΠΊΠΎΠ²Π°, ΠΌΠ΅Π΄ΠΈΡ†ΠΈΠ½ΠΈ ΠΈ ΠΏΡ€ΠΎΠΈΠ·Π²ΠΎΠ΄ΡšΠΈ Ρ…Ρ€Π°Π½Π΅. Π£ΠΏΠΎΡ‚Ρ€Π΅Π±Π° гСнСтски ΠΌΠΎΠ΄ΠΈΡ„ΠΈΠΊΠΎΠ²Π°Π½ΠΈΡ… ΠΎΡ€Π³Π°Π½ΠΈΠ·Π°ΠΌΠ° Ρƒ ΠΎΠ²ΠΈΠΌ дСлатностима јСдно јС ΠΎΠ΄ Π½Π°Ρ˜Π°ΠΊΡ‚ΡƒΠ΅Π»Π½ΠΈΡ˜ΠΈΡ… ΠΏΠΈΡ‚Π°ΡšΠ° Π΄Π°Π½Π°ΡˆΡšΠΈΡ†Π΅ Π½Π° којС Ρ‚Π΅ΠΊ Ρ‚Ρ€Π΅Π±Π° Π΄Π° сС Π΄Π΅Ρ„ΠΈΠ½ΠΈΡˆΡƒ ΠΎΠ΄Π³ΠΎΠ²ΠΎΡ€ΠΈ. Од свих Π°ΠΊΡ‚ΡƒΠ΅Π»Π½ΠΈΡ… Ρ‚Π΅ΠΌΠ° ΠΈΠ· ΠΎΠ²Π΅ области најмањС јС паТњС посвСћСно ΠΏΠΎΡ‚Π΅Π½Ρ†ΠΈΡ˜Π°Π»Π½ΠΎΡ˜ ΠΏΡ€ΠΈΠΌΠ΅Π½ΠΈ гСнСтски ΠΌΠΎΠ΄ΠΈΡ„ΠΈΠΊΠΎΠ²Π°Π½ΠΈΡ… ΠΎΡ€Π³Π°Π½ΠΈΠ·Π°ΠΌΠ° Ρƒ Π·Π°ΡˆΡ‚ΠΈΡ‚ΠΈ ΠΆΠΈΠ²ΠΎΡ‚Π½Π΅ срСдинС. УзСвши Ρƒ ΠΎΠ±Π·ΠΈΡ€ Π΄Π° јС ΠΏΠΈΡ‚Π°ΡšΠ΅ Π·Π°ΡˆΡ‚ΠΈΡ‚Π΅ ΠΆΠΈΠ²ΠΎΡ‚Π½Π΅ срСдинС јСдно ΠΎΠ΄ Π½Π°Ρ˜Π°ΠΊΡ‚ΡƒΠ΅Π»Π½ΠΈΡ˜ΠΈΡ… ΠΏΠΈΡ‚Π°ΡšΠ° Π΄Π°Π½Π°ΡˆΡšΠΈΡ†Π΅, Ρƒ ΠΎΠ²ΠΎΠΌ Ρ€Π°Π΄Ρƒ ΠΏΡ€Π΅Π·Π΅Π½Ρ‚ΠΎΠ²Π°Π»ΠΈ смо појСдинС ΠΏΡ€ΠΈΠΌΠ΅Ρ€Π΅ ΡƒΠΏΠΎΡ‚Ρ€Π΅Π±Π΅ гСнСтски ΠΌΠΎΠ΄ΠΈΡ„ΠΈΠΊΠΎΠ²Π°Π½ΠΈΡ… ΠΌΠΈΠΊΡ€ΠΎΠΎΡ€Π³Π°Π½ΠΈΠ·Π°ΠΌΠ°, гСнСтски ΠΌΠΎΠ΄ΠΈΡ„ΠΈΠΊΠΎΠ²Π°Π½ΠΈΡ… Π±ΠΈΡ™Π°ΠΊΠ° ΠΈ гСнСтски ΠΌΠΎΠ΄ΠΈΡ„ΠΈΠΊΠΎΠ²Π°Π½ΠΈΡ… ΠΆΠΈΠ²ΠΎΡ‚ΠΈΡšΠ° ΠΊΠ°ΠΎ ΠΏΠΎΡ‚Π΅Π½Ρ†ΠΈΡ˜Π°Π»Π½ΠΈΡ… Ρ€Π΅ΡˆΠ΅ΡšΠ° ΠΎΠ²ΠΎΠ³ Π³ΠΎΡ€ΡƒΡ›Π΅Π³ ΠΏΡ€ΠΎΠ±Π»Π΅ΠΌΠ°. Π‘ ΠΎΠ±Π·ΠΈΡ€ΠΎΠΌ Π΄Π° сС Ρƒ Ρ˜Π°Π²Π½ΠΎΡΡ‚ΠΈ ΠΏΠΎΡΠ»Π΅Π΄ΡšΠΈΡ… Π½Π΅ΠΊΠΎΠ»ΠΈΠΊΠΎ Π³ΠΎΠ΄ΠΈΠ½Π° Π²ΠΎΠ΄Π΅ ΠΎΡˆΡ‚Ρ€Π΅ ΠΏΠΎΠ»Π΅ΠΌΠΈΠΊΠ΅ ΠΎΠΊΠΎ Π΄Π°Ρ™Π΅ ΠΏΡ€ΠΈΠΌΠ΅Π½Π΅ Ρ‚Π΅Ρ…Π½ΠΎΠ»ΠΎΠ³ΠΈΡ˜Π΅ Π³Π΅Π½Π΅Ρ‚ΠΈΡ‡ΠΊΠΎΠ³ ΠΈΠ½ΠΆΠ΅ΡšΠ΅Ρ€ΡΡ‚Π²Π°, јасно јС Π΄Π° смо Π΄Π°Π»Π΅ΠΊΠΎ ΠΎΠ΄ ΠΊΠΎΠ½Π°Ρ‡Π½Π΅ ΠΎΠ΄Π»ΡƒΠΊΠ΅. Π•Π²ΠΈΠ΄Π΅Π½Ρ‚Π½ΠΎ јС Π΄Π° нас Ρƒ Π΄Π°Ρ™ΠΈΠΌ ΠΊΠΎΡ€Π°Ρ†ΠΈΠΌΠ° ΠΌΠΎΡ€Π° Π²ΠΎΠ΄ΠΈΡ‚ΠΈ ΠΎΠΏΡ€Π΅Π· ΠΈ Π°Π½Π°Π»ΠΈΠ·Π° ΠΏΠΎΡΡ‚ΠΎΡ˜Π΅Ρ›ΠΈΡ… ΠΈ Π±ΡƒΠ΄ΡƒΡ›ΠΈΡ… Π½Π°ΡƒΡ‡Π½ΠΈΡ… ΠΈΡΡ‚Ρ€Π°ΠΆΠΈΠ²Π°ΡšΠ° Π½Π° Ρ‚Π΅ΠΌΡƒ бСзбСдности ΠΎΠ²Π΅ Ρ‚Π΅Ρ…Π½ΠΎΠ»ΠΎΠ³ΠΈΡ˜Π΅

    ΠŸΠΎΡ‚Π΅Π½Ρ†ΠΈΡ˜Π°Π»Π½Π° ΠΏΡ€ΠΈΠΌΠ΅Π½Π° гСнСтски ΠΌΠΎΠ΄ΠΈΡ„ΠΈΠΊΠΎΠ²Π°Π½ΠΈΡ… ΠΎΡ€Π³Π°Π½ΠΈΠ·Π°ΠΌΠ° Ρƒ Π·Π°ΡˆΡ‚ΠΈΡ‚ΠΈ ΠΆΠΈΠ²ΠΎΡ‚Π½Π΅ срСдинС

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    OΠ΄ свог ΡƒΡ‚Π΅ΠΌΠ΅Ρ™Π΅ΡšΠ° Ρƒ сСдамдСсСтим Π³ΠΎΠ΄ΠΈΠ½Π°ΠΌΠ° двадСсСтог Π²Π΅ΠΊΠ° Π΄ΠΎ данас, Ρ‚Π΅Ρ…Π½ΠΎΠ»ΠΎΠ³ΠΈΡ˜Π° Π³Π΅Π½Π΅Ρ‚ΠΈΡ‡ΠΊΠΎΠ³ ΠΈΠ½ΠΆΠ΅ΡšΠ΅Ρ€ΡΡ‚Π²Π° ΠΎΡ‚Π²ΠΎΡ€ΠΈΠ»Π° јС ΡˆΠΈΡ€ΠΎΠΊ Π½ΠΈΠ· ΠΏΡ€ΠΈΠΌΠ΅Π½Π° ΠΏΡ€Π΅ свСга Ρƒ Π½Π°ΡƒΡ†ΠΈ, ΠΏΡ€ΠΎΠΈΠ·Π²ΠΎΠ΄ΡšΠΈ Π»Π΅ΠΊΠΎΠ²Π°, ΠΌΠ΅Π΄ΠΈΡ†ΠΈΠ½ΠΈ ΠΈ ΠΏΡ€ΠΎΠΈΠ·Π²ΠΎΠ΄ΡšΠΈ Ρ…Ρ€Π°Π½Π΅. Π£ΠΏΠΎΡ‚Ρ€Π΅Π±Π° гСнСтски ΠΌΠΎΠ΄ΠΈΡ„ΠΈΠΊΠΎΠ²Π°Π½ΠΈΡ… ΠΎΡ€Π³Π°Π½ΠΈΠ·Π°ΠΌΠ° Ρƒ ΠΎΠ²ΠΈΠΌ дСлатностима јСдно јС ΠΎΠ΄ Π½Π°Ρ˜Π°ΠΊΡ‚ΡƒΠ΅Π»Π½ΠΈΡ˜ΠΈΡ… ΠΏΠΈΡ‚Π°ΡšΠ° Π΄Π°Π½Π°ΡˆΡšΠΈΡ†Π΅ Π½Π° којС Ρ‚Π΅ΠΊ Ρ‚Ρ€Π΅Π±Π° Π΄Π° сС Π΄Π΅Ρ„ΠΈΠ½ΠΈΡˆΡƒ ΠΎΠ΄Π³ΠΎΠ²ΠΎΡ€ΠΈ. Од свих Π°ΠΊΡ‚ΡƒΠ΅Π»Π½ΠΈΡ… Ρ‚Π΅ΠΌΠ° ΠΈΠ· ΠΎΠ²Π΅ области најмањС јС паТњС посвСћСно ΠΏΠΎΡ‚Π΅Π½Ρ†ΠΈΡ˜Π°Π»Π½ΠΎΡ˜ ΠΏΡ€ΠΈΠΌΠ΅Π½ΠΈ гСнСтски ΠΌΠΎΠ΄ΠΈΡ„ΠΈΠΊΠΎΠ²Π°Π½ΠΈΡ… ΠΎΡ€Π³Π°Π½ΠΈΠ·Π°ΠΌΠ° Ρƒ Π·Π°ΡˆΡ‚ΠΈΡ‚ΠΈ ΠΆΠΈΠ²ΠΎΡ‚Π½Π΅ срСдинС. УзСвши Ρƒ ΠΎΠ±Π·ΠΈΡ€ Π΄Π° јС ΠΏΠΈΡ‚Π°ΡšΠ΅ Π·Π°ΡˆΡ‚ΠΈΡ‚Π΅ ΠΆΠΈΠ²ΠΎΡ‚Π½Π΅ срСдинС јСдно ΠΎΠ΄ Π½Π°Ρ˜Π°ΠΊΡ‚ΡƒΠ΅Π»Π½ΠΈΡ˜ΠΈΡ… ΠΏΠΈΡ‚Π°ΡšΠ° Π΄Π°Π½Π°ΡˆΡšΠΈΡ†Π΅, Ρƒ ΠΎΠ²ΠΎΠΌ Ρ€Π°Π΄Ρƒ ΠΏΡ€Π΅Π·Π΅Π½Ρ‚ΠΎΠ²Π°Π»ΠΈ смо појСдинС ΠΏΡ€ΠΈΠΌΠ΅Ρ€Π΅ ΡƒΠΏΠΎΡ‚Ρ€Π΅Π±Π΅ гСнСтски ΠΌΠΎΠ΄ΠΈΡ„ΠΈΠΊΠΎΠ²Π°Π½ΠΈΡ… ΠΌΠΈΠΊΡ€ΠΎΠΎΡ€Π³Π°Π½ΠΈΠ·Π°ΠΌΠ°, гСнСтски ΠΌΠΎΠ΄ΠΈΡ„ΠΈΠΊΠΎΠ²Π°Π½ΠΈΡ… Π±ΠΈΡ™Π°ΠΊΠ° ΠΈ гСнСтски ΠΌΠΎΠ΄ΠΈΡ„ΠΈΠΊΠΎΠ²Π°Π½ΠΈΡ… ΠΆΠΈΠ²ΠΎΡ‚ΠΈΡšΠ° ΠΊΠ°ΠΎ ΠΏΠΎΡ‚Π΅Π½Ρ†ΠΈΡ˜Π°Π»Π½ΠΈΡ… Ρ€Π΅ΡˆΠ΅ΡšΠ° ΠΎΠ²ΠΎΠ³ Π³ΠΎΡ€ΡƒΡ›Π΅Π³ ΠΏΡ€ΠΎΠ±Π»Π΅ΠΌΠ°. Π‘ ΠΎΠ±Π·ΠΈΡ€ΠΎΠΌ Π΄Π° сС Ρƒ Ρ˜Π°Π²Π½ΠΎΡΡ‚ΠΈ ΠΏΠΎΡΠ»Π΅Π΄ΡšΠΈΡ… Π½Π΅ΠΊΠΎΠ»ΠΈΠΊΠΎ Π³ΠΎΠ΄ΠΈΠ½Π° Π²ΠΎΠ΄Π΅ ΠΎΡˆΡ‚Ρ€Π΅ ΠΏΠΎΠ»Π΅ΠΌΠΈΠΊΠ΅ ΠΎΠΊΠΎ Π΄Π°Ρ™Π΅ ΠΏΡ€ΠΈΠΌΠ΅Π½Π΅ Ρ‚Π΅Ρ…Π½ΠΎΠ»ΠΎΠ³ΠΈΡ˜Π΅ Π³Π΅Π½Π΅Ρ‚ΠΈΡ‡ΠΊΠΎΠ³ ΠΈΠ½ΠΆΠ΅ΡšΠ΅Ρ€ΡΡ‚Π²Π°, јасно јС Π΄Π° смо Π΄Π°Π»Π΅ΠΊΠΎ ΠΎΠ΄ ΠΊΠΎΠ½Π°Ρ‡Π½Π΅ ΠΎΠ΄Π»ΡƒΠΊΠ΅. Π•Π²ΠΈΠ΄Π΅Π½Ρ‚Π½ΠΎ јС Π΄Π° нас Ρƒ Π΄Π°Ρ™ΠΈΠΌ ΠΊΠΎΡ€Π°Ρ†ΠΈΠΌΠ° ΠΌΠΎΡ€Π° Π²ΠΎΠ΄ΠΈΡ‚ΠΈ ΠΎΠΏΡ€Π΅Π· ΠΈ Π°Π½Π°Π»ΠΈΠ·Π° ΠΏΠΎΡΡ‚ΠΎΡ˜Π΅Ρ›ΠΈΡ… ΠΈ Π±ΡƒΠ΄ΡƒΡ›ΠΈΡ… Π½Π°ΡƒΡ‡Π½ΠΈΡ… ΠΈΡΡ‚Ρ€Π°ΠΆΠΈΠ²Π°ΡšΠ° Π½Π° Ρ‚Π΅ΠΌΡƒ бСзбСдности ΠΎΠ²Π΅ Ρ‚Π΅Ρ…Π½ΠΎΠ»ΠΎΠ³ΠΈΡ˜Π΅

    AGRO-WASTE NATURAL FIBER SAMPLE PREPARATION TECHNIQUES FOR BIO-COMPOSITES DEVELOPMENT: METHODOLOGICAL INSIGHTS

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    In today's engineering industries, there is a growing focus on sustainable and eco-friendly products due to their recyclability, abundant availability and property variability. One key aspect of this sustainability effort is the development of eco-friendly materials, particularly bio composites derived from agricultural waste residues. The physical, mechanical and thermal properties as well as suitability of these fibers depend greatly on the methods used for extraction, processing, chemical modification and physical treatments. Understanding these processes comprehensively is essential for obtaining desired natural fibers/fillers from agricultural waste for creating effective bio composites to meet specific application demands. This study aims to provide a comprehensive assessment of the various extraction and modification techniques employed for natural fibers. It offers an in-depth review of diverse extraction processes, ranging from the initial harvesting to the decortication stage. It has been revealed that the choice of extraction methodologies depends on climate, water resources, local traditions, and the desired fiber quality. Additionally, the paper explores chemical and physical treatments, highlighting how each method influences the structure and properties of natural fibers. Overall, this review offers practical insights into the steps taken to transform agro-waste biomass into desired natural fiber and in turn biocomposite material, while enhancing product quality and performance

    Food additives in chemistry lessons

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    Els additius alimentaris sΓ³n components comuns en els aliments i un bon context d'estudi per a les classes de quΓ­mica. En aquest treball, es descriu una sessiΓ³ de laboratori per a estudiants de secundΓ ria (17-18 anys). Els alumnes van determinar algunes propietats fΓ­siques i quΓ­miques de quatre additius Β«desconegutsΒ». Utilitzant els resultats de les proves, els estudiants havien d'esbrinar, entre els deu possibles additius d'una determinada llista, quins eren els quatre additius analitzats. Els estudiants van treballar en petits grups. Un 26 % dels estudiants (grups) va identificar correctament els quatre additius, un 29 % en va identificar tres i el 45 % en va identificar dos.Food additives are common food components and they should be studied in chemistry classes. This paper describes a lab lesson for high school seniors (17-18 years old). They tested some physical and chemical properties of four unknown additives. Using the test results the students had to figure out which four of the ten additives from a list given had been tested. The students worked in small groups. All four correct additives were chosen by 26 % of students (groups), three correct additives by 29 % and two correct additives by 45 % of students
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