Analysis of students difficulties based on respondents ability test on the topic of factors affecting reaction rate

Sari, Wiwik Kartika; Supriatna, Agus; Hendayana, Sumar

doi:10.1088/1742-6596/1157/4/042032

Cited by 6 publications

(4 citation statements)

References 6 publications

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“…Therefore, there was a difference in surface area when exposed to heat. Sample SM-B has a smaller surface area and is less exposed to heat, thus it is able to minimize the damage of phenolic compounds [19]. Cold pressed ginger is more concentrated than hot water-extracted ginger, thus the functional content of ginger is more contained in cold-pressed ginger [23].…”

Section: Antioxidant Activitymentioning

confidence: 99%

“…Cold pressed ginger has a liquid texture, so it has a larger surface area due to the smaller particle size. Moreover, the larger the surface area will result in the more frequency of collision occurs and as a consequence, result in an easier and higher reaction rate [19]. The heat directly received by the cold-pressed ginger occurs more easily and resulted in the degradation of polyphenol compounds since they are very sensitive to heat [20].…”

Section: Antioxidant Activitymentioning

confidence: 99%

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Evaluating consumer preferences based on the total antioxidant activity of the Indonesian herbal drink “Bandrek”

Wilianto

Ervina

2023

IOP Conf. Ser.: Earth Environ. Sci.

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Traditional herbal drink is made from local herbs and is believed to be able to increase immune system. Bandrek is a Javanese traditional drink commonly made with local herbs and spices. One of the important ingredients should be added in bandrek is ginger. The objective of this study is to investigate consumers’ preferences of bandrek with different processing treatments of ginger (control, cold press, oven-cold press, cold press-boiled, smashed-boiled). In addition, sensorial profiles of bandrek with different ginger treatment was also investigated. A total of 105 consumers participated and their liking scores for bandrek were assessed. In addition, the descriptive sensory evaluation was measured using QDA (Quantitative Descriptive Analysis) by 13 trained panelists and the total antioxidant activity was analyzed using DPPH (2,2-diphenyl-1-picrylhydrazyl) method. The result shows that the bandrek drinks with cold pressed ginger had the highest antioxidant activity compared to the other samples. Moreover, these samples were also shown to be closely associated with consumers’ preferences and correlated with the aroma and taste of spices and herbs including the hot sensation of ginger. This study could be used as a preliminary study to develop functional drinks made from ginger by considering ginger treatment and its antioxidant content.

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Section: Antioxidant Activitymentioning

confidence: 99%

Section: Antioxidant Activitymentioning

confidence: 99%

Evaluating consumer preferences based on the total antioxidant activity of the Indonesian herbal drink “Bandrek”

Wilianto

Ervina

2023

IOP Conf. Ser.: Earth Environ. Sci.

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“…Therefore, Augmented Reality learning media on the subtopic of the effect of reactant concentration on the reaction rate requires visualization to explain the difference in the number of molecules at different concentrations of reactants and the difference in collisions which is more effective. Based on research by Sari et al [18]. Regarding the factors that affect the reaction rate, students also experience learning difficulties, one of which is understanding the relationship between catalysts and activation energy.…”

Section: A Analysismentioning

confidence: 99%

Development of Assemblr Edu-Assisted Augmented Reality Learning Media on the Topic of Effect of Reactant’s Concentration and Catalyst on Reaction Rate

Octaviani

Harta

Winarta

2022

JCER (J. Chemistry Educ. Res.)

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The level of submicroscopic representation can be cause of difficulty in learning chemistry, so that interest and understanding of chemistry concept is low. In overcoming this, innovative learning media are needed that are able to visualize and make it easier to understand abstract concepts, especially on the subtopic of the effect of reactant’s concentration and catalyst on the chemical rate reactions. This research aims to create product in the form of Augmented Reality assisted by Assemblr Edu that is valid, effective, and practical. This study is Research and Development that uses ADDIE development model and involves 10 prospective chemistry teacher students. Research instruments include validation sheets, test items, and response questionnaire. Data were analyzed using Aiken's V and descriptive statistic. The results showed that: (1) product have fulfilled very valid criteria with average percentage of 92% with aspect of product presentation and use are 92% (very valid), content aspect of 94% (very valid); language aspect by 92% (very valid); (2)average test score of respondents after using the product is 70 which indicates that product is classified as effective; and (3)average response to the product is 90% indicating that the product is very good and classified as very practical. The product is feasible to use and can support the mastery of technology-based concept, especially in the subtopic of the effect of reactant’s concentration and catalyst on chemical rate reactions.

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“…According to the descriptive analysis, students are knowledgeable about the factors that influence reaction rates, but they do not comprehend them These findings indicate that students are still unaware of how these factors impact reaction rates. Further investigation is needed to find out how to overcome students' learning difficulties related to factors that influence reaction rates [19]. The level of understanding and difficulty of the subject in molecular geometry is assessed by conducting a respondent ability test.…”

Section: Introductionmentioning

confidence: 99%

Analyzing the Difficulties Students Face in Comprehending Fundamental Concepts in the Field of Atomic Structure and Chemical Bonds in the Basic Chemistry Course

Nugraha,

Sinaga,

Sutiani

et al. 2024

Proceedings of the 5th International Conference on Innovation in Education, Science, and Culture, ICIESC 2023, 24 October 2023,

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This study aimed to examine the difficulties that students encounter in comprehending fundamental concepts related to atomic structure and chemical bonds in the Basic Chemistry course. Population from study is student Chemistry Department FMIPA Unimed in 2022/2023. Determination of the sample study used random sampling. The sample in the study consisting of 80 students from 3 classes, namely: PSPK22C, CESP22, and PSKM22B. The results of the study show that average value for CESP22 class, PSPK22C, and PSKM22B respectively is 70.167; 56.621; and 54.212, meanwhile average value for third class is 58,675 (categories low). The materials with the level low and very low mastery are: Bohr atomic model, atomic mechanics model wave, Atomic Properties, Formation process ionic bond, Formation process bond covalent, and Shape molecule. Material Numbers quantum, Properties ionic compounds, and Exceptions octet rule on formation bond covalent in category good and very good.

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Analysis of students difficulties based on respondents ability test on the topic of factors affecting reaction rate

Cited by 6 publications

References 6 publications

Evaluating consumer preferences based on the total antioxidant activity of the Indonesian herbal drink “Bandrek”

Evaluating consumer preferences based on the total antioxidant activity of the Indonesian herbal drink “Bandrek”

Development of Assemblr Edu-Assisted Augmented Reality Learning Media on the Topic of Effect of Reactant’s Concentration and Catalyst on Reaction Rate

Analyzing the Difficulties Students Face in Comprehending Fundamental Concepts in the Field of Atomic Structure and Chemical Bonds in the Basic Chemistry Course

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