Garuda - Garba Rujukan Digital

PEMBUATAN FILM INDIKATOR pH ASAM BASA DARI EKSTRAK BUAH MURBEI (Morus alba L) BERBASIS KITOSAN Anis Susanti; Husna Amalya Melati; Lukman Hadi
EduChem Vol 1, No 1 (2020): FEBRUARI 2020
Publisher : Universitas Tanjungpura, Prodi Pendidikan Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/educhem.v1i1.37422

Morus alba L species, usually known as mulberry, have a distinctive color, namely blackish purple. This color is caused by the presence of anthocyanin compounds which are color pigments. Anthocyanin compounds have the potential to be used as indicators of acid base. This study aims to determine the pH, solubility and shelf life trails of acid-base indicator films from chitosan-based mulberry fruit extracts. The method used is extraction by maceration, through immersion of mulberry fruit that has been refined using 96% ethanol solvent. Determination of the pH route using an acetate buffer solution with a pH of 1-14. The solubility of acid-base indicator film can be seen by immersing the indicator film in water for 24 hours, weighing it to a constant and comparing it to film that is not immersed in water and calculated the value of FS% (film solution). The shelf life of the indicator film was observed using a microscope to find out whether there was mold growth on the surface of the film. The results of the study showed that the pH of the acid-base indicator film strain of mulberry fruit extract, namely, pH 1-3 were red, and pH 10-14 were green. Based on data analysis, the percentage of the solubility of the acid-base indicator film of mulberry extract was 40.18%, which means that the indicator film with mulberry extract was hydrophilic so that it was easily dissolved in water compared to without the mulberry extract of 22.2% which had lower solubility values. Durability for 30 days was observed in the absence of growth of microorganisms / fungi on the surface of the indicator film.

Video with multiple representations approach to promote students’ conceptual understanding of intermolecular forces Erlina Erlina; Eny Enawaty; Husna Amalya Melati; Ira Lestari
International Journal of Evaluation and Research in Education (IJERE) Vol 12, No 4: December 2023
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijere.v12i4.25243

A number of studies have reported that the main cause of misconceptions are the abstract concepts and students’ low ability to integrate multiple representations (macroscopic, sub-microscopic and symbolic) in chemistry is also a cause of misconceptions. The aim of this study is to develop the video using multiple representations approach to improve students’ conceptual understanding. The method used is the analyze, design, development, implementation, and evaluation or ADDIE development model. Tests (pre and post) and questionnaire were used to collect the data. A video of intermolecular forces has been developed and tested to 82 first-year cohort students of the Chemistry Education Study Program who had taken basic chemistry courses. The average scores were increased from 57.31 (pre-test) to 78.19 (post-test) with the average gain is 20.88. The statistically significant increase in scores (p=0.000) was found, which signifies that the video could support students’ conceptual understanding. In addition to that, majority of students showed a positive response to the video as 99% (N=82) of them either agree or strongly agree with the statements of the questionnaire. This result verified that the video was successfully maintain students’ attention.

Chemsitry Learning Outcomes of 11th Grade Science Students at SMAN 1 Rasau Jaya Fitrianti, Nenny; Melati, Husna Amalya; Rasmawan, Rahmat; Sartika, Rody Putra; Hadi, Lukman
Hydrogen: Jurnal Kependidikan Kimia Vol 12, No 1 (2024): February 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i1.10440

This study discusses the ineffective chemistry learning process resulting in poor grades at State Senior High School (SMAN) 1 Rasau Jaya, students tend to receive information from the teacher without constructing their own knowledge, so students have difficulty in constructing the material obtained from the teacher. The purpose of this study is to describe the learning outcomes of students in 11th Grade Science Class odd semester in chemistry subjects at SMAN 1 Rasau Jaya. The form of research used in this research is descriptive research, and the type of research is a case study. Case study is one of qualitative research, in which researchers conduct in-depth exploration of programs, events, processes, activities, for one or more people. The subjects of this study were students of 11th Grade Science Class at SMAN 1 Rasau Jaya in the 2019/2020 school year who took the odd semester general test, totaling 93 students. The research process includes three stages, namely the preparation stage, the implementation stage, and the final stage. The data collection tool used is the odd semester general test score. Results and Discussion regarding Indicator 1: List the general formula of alkane, alkene and alkyne compounds, Indicator 2: Mention the law of conservation of energy, Indicator 3: Determine the number of moles from the results of the experiment, Indicator 4: Determine the value of the equilibrium constant Kc based on the reaction. The results of the general test conducted on 11th Grade students of SMAN 1 Rasau Jaya can be concluded that the learning outcomes of students in the class are not adequate.

Development of Science Process Skills Assessment Instruments in Environment Based Practicum on Reaction Rate Material Nurmala, Nurmala; Sahputra, Rachmad; Rasmawan, Rahmat; Masriani, Masriani; Melati, Husna Amalya
Hydrogen: Jurnal Kependidikan Kimia Vol 12, No 1 (2024): February 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i1.10441

This study aims to produce an Environmental-Based Chemistry Practicum Assessment Instrument for Reaction Rate Material for 11th Grade of MA/ SMA. The development model used in this research is the development model according to Borg and Gall which consists of 4 stages: Potential and Problems, Gathering Information, Product Design, and Design Validation. The development in this study refers to the product produced in the form of an assessment instrument. which is measured until the validity of the expert where the validity aspects are based on the results of the experts' assessment validation questionnaire. The aspects assessed in the product of the environmental-based practicum performance instrument assessment instrument are the feasibility of instructions, content feasibility and language feasibility. The assessment instrument in this content aspect is arranged sequentially according to the practicum procedure. Based on the results of validation by validators, the linguistic aspect obtained a score with a percentage of 93%, then the linguistic aspect is divided into several assessment criteria, including the use of language in accordance with EYD, clarity of instructions and directions and the language used is straightforward and easy to understand Based on the results of validation by validators, the linguistic aspect obtained a score with a percentage of 91%. The validity level of the chemistry practicum performance assessment instrument measured practicum performance in the form of scores 1-4. Determination of the validity of the practicum performance assessment instrument is done by calculating the score given by the validator and analyzing the validator's suggestions and input on the instrument product assessment questionnaire sheet in the form of a check list. The results concluded that the student practicum performance assessment instrument was feasible to use.

PELATIHAN TEKNIK PENCELUPAN DAN PENGIKATAN WARNA BENANG KEPADA PERAJIN TENUN CORAK INSANG DI KOTA PONTIANAK Melati, Husna Amalya; Ratih, Yudithya; Kartika, Metasari
International Journal of Community Service Learning Vol. 3 No. 3 (2019): August 2019
Publisher : Universitas Pendidikan Ganesha

Pelatihan pencelupan dan pengikatan warna benang telah dilakukan kepada perajin tenun corak Insang di kota Pontianak. Kegiatan ini bertujuan untuk melatih perajin tenun agar dapat melakukan proses pencelupan dan pengikatan warna pada benang yang nantinya akan menghasilkan tenunan bermotif corak Insang. Pelatihan diikuti oleh perajin tenun yang tergabung dalam kelompok swadaya masyarakat yaitu KSM Mekar II dan KSM Pucuk Rebung. Sebanyak 12 orang dari anggota KSM yang mengikuti pelatihan ini. Peserta mendapat penjelasan materi berupa bahan yang digunakan dalam proses pencelupan meliputi zat warna dan penguncinya (fixer) serta praktek pencelupan dan pengikatan warna pada benang. Hasil pelatihan menunjukkan bahwa peserta telah mampu melakukan proses pencelupan dan pengikatan warna benang yang selanjutnya dianik sebagai benang lusi pada suri serta siap untuk ditenun menghasilkan tenun corak Insang.

PENINGKATAN KAPASITAS PENENUN CORAK INSANG MELALUI PELATIHAN MOTIVASI USAHA DAN MENGANIK Husna Amalya Melati; Yudithya Ratih; Metasari Kartika
ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat Vol. 2 No. 2 (2017): ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat
Publisher : Talenta Publisher

Non Government Organisations as known as Kelompok Swadaya Masyarakat (KSM) Mekar IIand Pucuk Rebung became the only Insang style of weaving craft employers in the city ofPontianak were located on Jalan Khatulistiwa, Batulayang District. The Insang style of weavingis one of the features produced by KSM, besides the typical weaving of Sambas. Only a smallportion of craft employers or weavers which produces the weaving of Insang style because it isfeared that the market target is not much, however this pattern is a typical of Pontianak city;The capital of West Kalimantan Province. Decreased motivation for weaving since it faced theproblem not knowing how to understand that is the upstream process in weaving. Training isdone by giving the material about the weaving process, especially the stage of understandingand motivation and business development opportunities to the partners until all the materialpresented and implemented. Participants said that they were ready to weave back and werewilling to support the development of their area into a village or a weaving center. One of themis shown by the willingness of their house to be decorated or painted with Insang style. Thetraining that was done successfully resulted in more than 15 people weavers who haveunderstood how to do the â€œnganikâ€ process.

Development of Domia Card (Domino Chemistry) as Evaluation Media of Mol Concept Phikly, Anastasius Khristozolla; Harun, Andi Ifriany; Melati, HUsna Amalya
Hydrogen: Jurnal Kependidikan Kimia Vol. 11 No. 6 (2023): December 2023
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v11i6.9188

The level of achievement of students at State Senior High School (SMAN) 1 Putussibau in the material of the mole concept only reached 20%, and this figure cannot even depict the true potential of students in understanding the mole concept due to indications of cheating in every monotonous evaluation. DOMIA (Chemical Domino) was developed to address the problem of a lack of variation in evaluations while also reducing the incidence of student cheating in the evaluation process. DOMIA was developed with the R&D principle using the ADDIE model, and each process will be revised according to needs and field findings. The development of DOMIA took place after the needs analysis process through direct interviews with subject teachers and several randomly selected students. The developed DOMIA was then validated to test the level of feasibility and reliability based on Guilford indicators as a reference in assessment. DOMIA has Kr = 0.97 and Ks = 0.947, indicating that DOMIA is highly valid and very reliable, making it ready for implementation and serving as a new evaluation tool that has not existed in the chemistry subject before.

Chemsitry Learning Outcomes of 11th Grade Science Students at SMAN 1 Rasau Jaya Fitrianti, Nenny; Melati, Husna Amalya; Rasmawan, Rahmat; Sartika, Rody Putra; Hadi, Lukman
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 1 (2024): February 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i1.10440

This study discusses the ineffective chemistry learning process resulting in poor grades at State Senior High School (SMAN) 1 Rasau Jaya, students tend to receive information from the teacher without constructing their own knowledge, so students have difficulty in constructing the material obtained from the teacher. The purpose of this study is to describe the learning outcomes of students in 11th Grade Science Class odd semester in chemistry subjects at SMAN 1 Rasau Jaya. The form of research used in this research is descriptive research, and the type of research is a case study. Case study is one of qualitative research, in which researchers conduct in-depth exploration of programs, events, processes, activities, for one or more people. The subjects of this study were students of 11th Grade Science Class at SMAN 1 Rasau Jaya in the 2019/2020 school year who took the odd semester general test, totaling 93 students. The research process includes three stages, namely the preparation stage, the implementation stage, and the final stage. The data collection tool used is the odd semester general test score. Results and Discussion regarding Indicator 1: List the general formula of alkane, alkene and alkyne compounds, Indicator 2: Mention the law of conservation of energy, Indicator 3: Determine the number of moles from the results of the experiment, Indicator 4: Determine the value of the equilibrium constant Kc based on the reaction. The results of the general test conducted on 11th Grade students of SMAN 1 Rasau Jaya can be concluded that the learning outcomes of students in the class are not adequate.

Development of Science Process Skills Assessment Instruments in Environment Based Practicum on Reaction Rate Material Nurmala, Nurmala; Sahputra, Rachmad; Rasmawan, Rahmat; Masriani, Masriani; Melati, Husna Amalya
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 1 (2024): February 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i1.10441

This study aims to produce an Environmental-Based Chemistry Practicum Assessment Instrument for Reaction Rate Material for 11th Grade of MA/ SMA. The development model used in this research is the development model according to Borg and Gall which consists of 4 stages: Potential and Problems, Gathering Information, Product Design, and Design Validation. The development in this study refers to the product produced in the form of an assessment instrument. which is measured until the validity of the expert where the validity aspects are based on the results of the experts' assessment validation questionnaire. The aspects assessed in the product of the environmental-based practicum performance instrument assessment instrument are the feasibility of instructions, content feasibility and language feasibility. The assessment instrument in this content aspect is arranged sequentially according to the practicum procedure. Based on the results of validation by validators, the linguistic aspect obtained a score with a percentage of 93%, then the linguistic aspect is divided into several assessment criteria, including the use of language in accordance with EYD, clarity of instructions and directions and the language used is straightforward and easy to understand Based on the results of validation by validators, the linguistic aspect obtained a score with a percentage of 91%. The validity level of the chemistry practicum performance assessment instrument measured practicum performance in the form of scores 1-4. Determination of the validity of the practicum performance assessment instrument is done by calculating the score given by the validator and analyzing the validator's suggestions and input on the instrument product assessment questionnaire sheet in the form of a check list. The results concluded that the student practicum performance assessment instrument was feasible to use.

Title

Found 89 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 89 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 89 Documents
Search