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All Journal Jurnal Pendidikan Kimia Indonesia Jurnal Sains Materi Indonesia Jurnal Pengajaran MIPA Jurnal Inovasi Pendidikan Kimia EduChemia: Jurnal Kimia dan Pendidikan Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Jurnal Penelitian Pendidikan Kimia Akta Kimia Indonesia Jambura Journal of Educational Chemistry Indonesia Natural Research Pharmaceutical Journal (INRPJ) Optika : Jurnal Pendidikan Fisika Jurnal Pendidikan Fisika dan Sains (JPFS) Computational and Experimental Research in Materials and Renewable Energy (CERiMRE) Malewa: Journal of Multidisciplinary Educational Research SEGARA : Jurnal Pengabdian Kepada Masyarakat
Isriyanti Affifah, Isriyanti
Jurusan Pendidikan Kimia FKIP UNTIRTA
Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Dentistry Earth & Planetary Sciences Education Energy Health Professions Immunology & microbiology Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Physics Other

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Comparison of the mechanical properties of four-layer epoxy composite reinforced with natural jute fibers and symmetrical e-glass synthetic fibers Rahmat Firman Septiyanto; Hanif Akbar Dawam Abdullah; Isriyanti Affifah; Fatah Sulaiman; Syamsul Hidayat; Rahmat Awaludin Salam
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 6, No 1 (2020)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (153.601 KB) | DOI: 10.30870/gravity.v6i1.6805

Abstract

ABSTRACTResearch that produces environmentally friendly products continues to be developing. Research related to the natural fiber jute material and epoxy matrix has done. Epoxy composite jute empowered do with the preparation of symmetry with four layers of fiber volume fraction of 27.89% and composite epoxy e-glass Fiber empowered four balance with 28.86% fiber volume fraction. Mechanical testing is done via Drag test to determine the tensile strength and stretch.  From the analysis, it's finding that the tensile strength of the symmetry jute fiber reinforced epoxy tensile strength was 48,378 MPa, and the strain was 11,998%. Meanwhile, the tensile strength and pressure in empowered epoxy e-glass fiber symmetry of four layers, each for 95.516 MPa and 7.7032%. Characterization has also been carried out through SEM testing. The results show that e-glass fiber fractures can still be seen as regular and tend to be straight and flat rods compared to symmetrical fiber-reinforced jute composite epoxy composites whose fibers are irregular. So that shows that the strength of the epoxy composite reinforced e-glass fiber is very large compared to the strength of the four-layer jute fiber-reinforced epoxy composite symmetry. 
Application of the Argument-Driven Inquiry Learning Model in Stimulating Students' Scientific Argumentation Skills on Acid-Base Material Siti Salsabila Utami; Ratna Sari Siti Aisyah; Isriyanti Affifah
Jurnal Pendidikan Kimia Indonesia Vol. 6 No. 1 (2022)
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jpk.v6i1.39162

Abstract

Literasi sains merupakan kemampuan abad 21 yang perlu dimiliki untuk menghadapi permasalahan yang terjadi di lingkungan sekitar dan menyelesaikannya dengan konsep serta pengetahuan yang telah dimiliki.  Namun masih banyak siswa yang kurang memiliki literasi sains. Rendahnya literasi sains peserta didik mengakibatkan sulitnya peserta didik dalam mengintegritaskan pengetahuan yang didapat dengan empat aspek litersi sains. Tujuan penelitian ini yaitu untuk menganalisis penerapan dan perbedaan hasil belajar sebelum dan sesudah menggunakan model pembelajaran Argument-Driven Inquiry pada materi asam basa. Pada penelitian ini menggunakan desain penelitian pre-eksperimen dengan One-Group Pretest-Postest. Sampel yang digunakan yaitu 30 orang peserta didik kelas XI IPA. Pemilihan sampel menggunakan cara Purposive Sampling. Instrument penelitian yaitu instrument tes pilihan ganda beralasan, lembar observasi dan rencana pelaksanaan pembelajaran. Teknik analisis data yang digunakan uji paired sample t-test. Hasil perhitungan uji paired sample t-test sebesar 0,000 sehingga terdapat perbedaan keterampilan argumentasi ilmiah peserta didik setelah diterapkan model pembelajaran Argument Driven Inquiry (ADI). Peserta didik lebih aktif saat pembelajaran dan memberikan argumentasi ilmiah sesuai dengan komponen argumentasi ilmiah yang baik.
Studi Interaksi Materi Elektron Al2O3 dengan Simulasi Monte Carlo dan wet-STEM Electron Tomography Rahmat Firman Septiyanto; Isriyanti Affifah
Akta Kimia Indonesia Vol 6, No 1 (2021)
Publisher : LPPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25493736.v6i1.9050

Abstract

Materials science and biology are both fields that require a three-dimensional (3D) structure characterization method. Tomography is an efficient tool for analyzing the three-dimensional structure of a material. The principle is based on the acquisition of a series of projected images at different tilt angles, and on the calculation of the three-dimensional (3D) volume reconstruction (tomogram) using a special algorithm. Various studies have been developed to perform electron tomography in Environmental Scanning Electron Microscopy (ESEM), which provides access to the observation of hydrated samples in an aquatic environment. In this study we present the feasibility of tomography on wet materials, namely Al2O3 compounds by simulating electron material interactions. From these simulations, we determine the optimum detectable thickness of water in the wet material which is calculated by Monte Carlo simulation.Keyword : Al2O3, Tomography, Monte Carlo Simulation, wet-STEM
Electrolysis Cell Learning Media Based on Virtual Reality Millealab Indah Langitasari; Isriyanti Affifah; Ratna Sari Siti Aisyah; Muhammad Alfian Pratama
EduChemia (Jurnal Kimia dan Pendidikan) Vol 7, No 2 (2022)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/educhemia.v7i1.17576

Abstract

The electrolytic cell is a chemical material with abstract and concrete concept characteristics. Students often need help learning this material, especially connecting concrete and abstract concepts. Therefore, media is needed that can facilitate students in understanding electrolytic cell material, which is made interesting by utilizing virtual reality technology. The purpose of this research is to produce chemistry learning media based on virtual reality with a feasible and practical MilleaLab platform. The research uses the ADDIE development model (analysis, design, develop, implement, evaluate). The product of this research is virtual reality-based learning media on the MilleaLab platform. The validation assessment from media and material experts with an error rate of 5% based on the Aiken scale obtained Vcount ≥ Vtable (Vtable = 0.87). Each value in the validation of media and material experts is 0.89 and 0.87 with the Valid category. The results of assessing student responses regarding the practicality of this learning media get 88% in the Very Good category. Based on these results, it can be concluded that MilleaLab virtual reality-based learning media on electrolytic cell material is a learning medium that is practical and feasible to use.
PENERAPAN MODEL PEMBELAJARAN ARGUMENT DRIVEN INQUIRY UNTUK MELATIH BERPIKIR KRITIS SISWA PADA TOPIK PENYANGGA Ratna Sari Siti Aisyah; Isriyanti Affifah; Andini Andini
Jurnal Penelitian Pendidikan Kimia: Kajian Hasil Penelitian Pendidikan Kimia Vol 10, No 1 (2023)
Publisher : Chemistry Education Study Program Sriwijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jppk.v10i1.20763

Abstract

AbstractThe ability to think critically is a 21st century ability that someone needs to have to assess information that spreads uncontrollably and solves problems with the knowledge they have. However, there are still many students who do not have the ability to think critically so they have not been able to solve problems that require critical thinking skills. The purpose of this study was to determine the differences in students' critical thinking skills before and after the application of the Argument Driven Inquiry and to find out how to increase students' critical thinking skills after the application of the Argument Driven Inquiry in buffer solution topic. research design was used one-group pretest-posttest. The sample used was 37 students of class XI IPA. The sample selection used purposive sampling. The research instrument used is the multiple choice reasoned test instrument, the lesson plan, student worksheets and observation sheets. The data analysis technique used is the paired sample t-test. The result of the calculation of the paired sample t-test is 0.000 so that there are differences in students' critical thinking skills before and after the application of the ADI learning model on the topic of buffer solutions. Through the value of N-Gain can be seen the increase of each indicator. The value obtained is that there is an increase in 6 KBK indicators. The N-gain score of each indicator has high and medium criteria.Keywords: ADI learning model; Critical Thinking; Buffer.AbstrakKemampuan berpikir kritis merupakan kemampuan abad 21 yang perlu dimiliki oleh seseorang untuk menilai informasi yang menyebar tak terkendali dan menyelesaikan masalah dengan pengetahuan yang dimiliki. Namun masih banyak peserta didik yang belum memiliki kemampuan berpikir kritis sehingga belum dapat menyelesaikan soal yang membutuhkan kemampuan berpikir kritis. Tujuan penelitian ini adalah untuk mengetahui perbedaan kemampuan berpikir kritis peserta didik sebelum dan sesudah penerapan model model pembelajaran Argumen Driven Inquiry dan mengetahui bagaimana peningkatan kemampuan berpikir kritis peserta didik setelah penerapan model pembelajaran Argument Drivent Inquiry pada topik larutan penyangga. Pada penelitian ini menggunakan desain penelitian One-Group Pretest-Posttest. Sampel yang digunakan sebanyak 37 orang peserta didik kelas XI IPA. Pemilihan sampel menggunakan teknik purposive sampling. Instrumen penelitian yang digunakan yaitu instrumen tes pilihan ganda beralasan, rencana pelaksanaan pembelajaran, lembar kerja peserta didik dan lembar observasi. Teknik analisis data yang digunakan adalah uji paired sample t-test. Hasil perhitungan uji paired sample t-test sebesar 0,000 sehingga terdapat perbedaan kemampuan berpikir kritis pada peserta didik sebelum dan sesudah penerapan model pembelajaran ADI pada topik larutan penyangga. Melalui nilai N-Gain dapat terlihat peningkatan dari masing-masing indikator. Nilai yang diperoleh bahwa terdapat peningkatan 6 indikator KBK. Skor N-gain setiap indikator memiliki kriteria tinggi dan sedang.Kata kunci: model pembelajaran ADI, berpikir kritis, larutan penyangga.
LIPID EXTRACT OF GRACILARIA SP. AS AN ANTI-APOPTOTIC CANDIDATE FOR CANCER THERAPY Isriyanti Affifah; Rahmat Firman Septiyanto; Fida Madayanti Warganegara
INDONESIA NATURAL RESEARCH PHARMACEUTICAL JOURNAL Vol 8, No 1 (2023)
Publisher : Fakultas Farmasi Universitas 17 Agustus 1945 Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52447/inrpj.v8i1.6809

Abstract

It has been claimed that an Indonesian seaweed lipid extract possesses antibacterial properties. The mitochondrial pathway reported that a long fatty acid (more than 10 carbon atoms), which is known as the major component in seaweed lipid extract, acts as an apoptotic agent. It has also been claimed that unsaturated fatty acids can prevent apoptosis. on this study, we investigated the role of an Indonesian seaweed lipid extract on the mitochondrial pathway of apoptosis. Lipid isolation was the first step of the study, which was carried out using centrifugation and a chloroform-methanol-phosphate buffer 2:1:0,8. Rotary evaporators were used to separate the lipid extract from its solvent. Dry weight Gracilaria sp. yield extraction was 21,8%. By using several centrifugation techniques in SET buffer (0,25 M Sucrose, 0,5 mmol EDTA, and 10 mmol/L Tris base), pH 7,4, mitochondria were recovered from rat liver. By adding 10% (v/v) lipid extract to a suspension of mitochondria, toxicity testing from the lipid extract was undertaken. By using light microscopy, mitochondrial morphological damage was seen. Gracilaria sp. exhibits strong apoptotic activity.
Study of the Contrast Observed on Carbon by Monte Carlo Simulation on wet-STEM Tomography Septiyanto, Rahmat Firman; Affifah, Isriyanti
Computational And Experimental Research In Materials And Renewable Energy Vol 5 No 1 (2022): May
Publisher : Physics Department, Faculty of Mathematics and Natural Sciences, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/cerimre.v5i1.31476

Abstract

Analyzing the structure of the material in the fields of material science needs a very good device and methods. Due to its principle in projected images at various tilt angles and calculation of the three-dimensional volume reconstruction with a distinct algorithm, tomography become an excellent tool for analyzing the 3D structure. Several research has been studied to apply electron tomography in ESEM (Environmental Scanning Electron Microscopy) which gives an opportunity in observing the wet material (hydrated) in the aquatic environment. In this research, we showed the advisability of wet-Carbon compound tomography by simulating the interaction of electron materials. Monte Carlo simulation was applied in this study to calculate the optimum water layer thickness in the wet material detected.Keywords: Carbon, Electron Tomography, Simulation of Monte Carlo, STEM
Synthesis of C-Dots Based on Bitter Melon Peel using the Bottom UP Method Septiyanto, Rahmat Firman; Qothrunnada, Qothrunnada; Saefullah, Asep; Affifah, Isriyanti
Computational And Experimental Research In Materials And Renewable Energy Vol 7 No 1 (2024): May
Publisher : Physics Department, Faculty of Mathematics and Natural Sciences, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/cerimre.v7i1.47636

Abstract

There is an increasing demand for creative ways to turn garbage into useful resources as environmental sustainability becomes more and more of a global concern. Carbon dots can be synthesized using organic materials, one of which is bitter melon skin. The goal of this research is to create an economical and environmentally friendly process for creating carbon dots from organic waste. The bitter melon peel synthesis process uses a bottom-up method with microwave techniques. Furthermore, c-dots were characterized using a UV-Vis spectrophotometer to determine the absorbance value and wavelength and FTIR (Fourier Transform Infra-Red) to determine the functional groups contained in the sample. The UV-Vis spectrophotometer characterization results obtained an absorbance value of 3.311 and a wavelength of 206 nm. FTIR results show the presence of O-H and C=C functional group bonds indicating that this synthesis process has been successfully carried out.Keyword: Carbon Dots, Bitter Melon Peel, Bottom-up
Development of A Chemoentrepreneurship Oriented Electronic Module (e-Module) On the Concept of Buffer Solutions Wijayanti, Imas Eva; Febriyanti; Affifah, Isriyanti
Malewa: Journal of Multidisciplinary Educational Research Vol 2 No 1 (2024): MALEWA: Journal of Multidisciplinary Educational Research
Publisher : Yayasan Dharma Lentera Khatulistiwa (MALEWA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61683/jome.v2i01.77

Abstract

Innovation in technology-based teaching materials is one of the innovations brought by technological advances in the 21st century in the field of education, one of which is module innovation in electronic form (e-module). However, millennial students currently don't really like learning science, one of which is chemistry because they think it's boring. This can be overcome by learning with a contextual approach, one of which is chemo-entrepreneurship in the form of electronic modules in buffer solution material. Through e-modules, students obtain information about chemical concepts in the processing of materials into chemical-based entrepreneurial products. The aim of this development research is to create a chemo-entrepreneurship oriented electronic module (e-module) based on the buffer solution concept. The ADDIE model which includes the stages of analysis, design, development, implementation and evaluation was used to plan this research. After going through validation by five material experts and media experts, this e-module was declared valid because the V value exceeded 0.80 in the Aiken's test. A total of 19 students of XI MIPA 4 SMA Negeri 8 Serang City were used for limited e-module testing and obtained a percentage of 92% in the very good category. Keywords: Electronic module (e-module), chemo-entrepreneurship, buffer solution, ADDIE
The Influence of Chemopoly Learning Media on Learning Motivation of Class XII Students on Elemental Chemistry Material Zanah, Lusi Miftahul; Sumiati, Tina Endah; Affifah, Isriyanti; Santuso, Edy; Kusumawati, Adline Charfian; Hartati, Ajeng
Jambura Journal of Educational Chemistry Vol 6, No 2 (2024): August
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/jjec.v6i2.23312

Abstract

This research aims to determine the effect of the Chemopoly learning media on increasing the learning motivation of class Students feel bored and dissatisfied with the delivery of material or giving assignments conventionally, especially when the chemistry subject is in the last class period. By implementing the Chemopoly learning media, students' learning motivation increases in chemistry subjects. Apart from that, Chemopoly learning media also increases understanding of concepts in the material provided by the teacher. The method used in this research is qualitative method. The type of research used is a qualitative descriptive approach. The research was conducted at SMA Negeri 8 Serang City with research subjects of class XII IPA 2 students totaling 37 students. The data collection techniques used are, observation, questionnaires and documentation. The research results showed that students' learning motivation increased after implementing the Chemopoly learning media. Students feel that learning chemistry is more fun and less monotonous after using Chemopoly learning media. Students also want the Chemopoly learning media to be applied to other subjects so that learning no longer uses conventional methods.
Co-Authors Akbar Hanif Dawam Akbar Hanif Dawam Abdullah Akbar Hanif Dawam Abdullah Alana Putri Rahmawati Andini Andini Annamevia, Kristy Asep Saefullah Ayu, Widya Purbo Kusumaning Bunbun Bundjali Bunbun Bundjali Cahyaningtyas, Gita Nandini Fatah Sulaiman Febriyanti Fida Madayanti Warganegara Fida Madayanti Warganegara Fida Madayanti Warganegara Fitri, Amelia Febriana Hanif Akbar Dawam Abdullah Hartati, Ajeng Ihsani, Annisa Zahra Imas Eva Wijayanti Imas Eva Wijayanti, Imas Eva Indah Langitasari Irah Namirah Irah Namirah Islaniah, Ade khoiru nisa Kurnia, Selvi Kusumawati, Adline Charfian M, Yus Rama Denny Masitoh Mangsur Muhammad Alfian Pratama Mukhtar, Yus Rama Denny Mustaqim, Ilham Namirag, Irah Nursaadah, Euis Qothrunnada, Qothrunnada Rahmat Awaludin Salam Rahmat Firman Septiyanto, Rahmat Firman Ratna Sari Siti Aisyah Ratna Sari Siti Aisyah Ratna Sari Siti Aisyah Rifdah Hanifah Santuso, Edy Sinda Intandiana Siti Salsabila Utami Sumiati, Tina Endah Syamsul Hidayat Syamsul Hidayat Tuherni, Erni Yus Rama Denny Zanah, Lusi Miftahul