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All Journal Jurnal Pendidikan Sains The Journal of Pure and Applied Chemistry Research EduChemia: Jurnal Kimia dan Pendidikan Jurnal Pendidikan: Teori, Penelitian, dan Pengembangan J-PEK (JURNAL PEMBELAJARAN KIMIA) JC-T (Journal Cis-Trans): Jurnal Kimia dan Terapannya Jurnal Rekayasa Bahan Alam dan Energi Berkelanjutan Indonesian Journal of Chemistry JCER (Journal of Chemistry Education Research) Makara Journal of Science
Anugrah Ricky Wijaya
Universitas Negeri Malang
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Energy Environmental Science Materials Science & Nanotechnology Medicine & Pharmacology Social Sciences Other

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Physicochemical Changes and Role of Analytical Chemistry in Black Garlic (Allium sativum L.) Processing Wonorahardjo, Surjani; Sari, Dian Puspita; Salsabila, Arini; Estiyawati, Estiyawati; Yuliani, Dewi; Wijaya, Anugrah Ricky; Suharti, Suharti; Kusumaningrum, Irma Kartika; Maharani, Chariztya Anggita; Noviyanti, Thjiong Angelina
Makara Journal of Science Vol. 27, No. 2
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Black garlic is a traditional spice having potential of herbal medicine; however, continuous heating darkens its color and changes its taste due to chemical processes and new equilibrium in the system. In this study, fresh garlic was processed into black garlic at 60 °C for 24 days. Changes in physical and chemical parameters, such as browning and protein content, reducing sugar content, and antioxidative components were recorded. Protein content was measured by Kjeldahl method, brown color development was analyzed using a color reader, reducing sugar was examined using a dinitro salicylic DNS reagent, and antioxidative activities were studied with a diphenyl picrylhydrazyl DPPH reagent in terms of their percent inhibition. Gas chromatography – mass sepctrometry (GC–MS) and Liquid Chromatography-High Relosultion Mass Spectrometry (LC–HRMS) were performed to determine the chemical profiles. Results showed a number of interesting features. The protein and sugar contents increased up to 3 and 4 times that of the initial values, respectively during processing. The antioxidative properties improved in the later stages. The chemical profiles of volatile and nonvolatile components were altered in their final stage. Sulfur and nitrogen-containing nonvolatile components were relatively stable during heating, but their compositions changed. The natural chemical changes reflect the biological potential dynamics in biological processes as herbal supplements. The reflection of the processes might go further into food chemistry and the food industry. This needs an interdisciplinary approach, expanded to biological concepts and safe, ethical industrial processes.
Learning, Teaching, and Demonstration of Unique Chemistry for the Indonesian Generation at Sanggar Bimbingan Mulia, Kuala Lumpur Malaysia Wijaya, Anugrah Ricky; Putra, Helwani Fuadi Sujoko; Syah, Alif Alfarisyi; Kusumaningrum, Irma Kartika; Syavika, Lukluatus
J-PEK (Jurnal Pembelajaran Kimia) Vol 8, No 2 (2023): J-PEK (JURNAL PEMBELAJARAN KIMIA)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um026v8i22023p58-64

Abstract

As a form of concern for the issues faced by the descendants of Indonesian nationals in Malaysia, especially for the Human Resources, we provide the unique theoretical and practical chemistry mentorship for future capability. Sanggar Bimbingan Sungai Mulia 5 is an organization that offers educational services for Indonesian descendants whose citizenship status is still unclear due to administrative reasons. Based on the Chemistry Department UM and Sanggar Bimbingan Mulia cooperation, It is important to enhance the nation's intellectual capacity, especially in ensuring the success of the mandatory 9-year education program. This community service aims to combat illiteracy, in still character education, and prepare students for higher education. The expected outcomes of this program is a unique chemistry Massive Open Online Course (MOOC), a service article published, a service report, and a poster. Our program successfully developed the interest of children to love a simple chemistry experiment and improved for reading and learning through various MOOC, books, and educational materials.
Chemistry Study and Entrepreneurship Program for the younger generation at Sanggar Bimbingan Sentul, Kuala Lumpur Malaysia Wijaya, Anugrah Ricky; Syah, Alif Alfarisyi; Putra, Helwani Fuadi Sujoko; Kusumaningrum, Irma Kartika; Pramesti, Indah Nur
J-PEK (Jurnal Pembelajaran Kimia) Vol 8, No 2 (2023): J-PEK (JURNAL PEMBELAJARAN KIMIA)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um026v8i22023p65-71

Abstract

The issues faced by the sons and daughters of Indonesian citizens (WNI) in Malaysia are social inequality, access to education, and a sense of community involvement. Sanggar Bimbingan Sentul, as a partner, provides learning facilities for WNI's children to solve these three main problems. We initiated to apply the program of MAWIRAKI (Matahari Kewirausahan Kimia) with chemistry study and entrepreneurship program through the Pengabdian Kemitraan Luar Negeri (PKLN) grant by Universitas Negeri Malang (UM). This program integrated by computer training with MS-Word and Paint programs, chemistry daily-life experiments, and the art of batik craft. The results of learning process WNI's children shows that 18 favored students in the Paint program and 10 in the MS Word program during computer training. The "Where's Vitamin C" experiment garnered support from 17 students, highlighting an interest in chemistry study. These activities involved the batik ecoprint and jumput, which received a positive response, with 15 students favoring batik jumputan and 11 choosing batik ecoprint. The WNI's children interest data during the learning process as the foundation and our spirit for developing programs to unearth the entrepreneurial potential and creativity of the younger generation.
Improving Student's Critical Thinking Ability Using Argument-Drivent Inquiry Approach in Thermochemistry Purwandari, Intan Diah; Muntholib; Anugrah Ricky Wijaya
JCER (Journal of Chemistry Education Research) Vol. 7 No. 2 (2023): Volume 7 No. 2 December 2023
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jcer.v7n2.p243-251

Abstract

This study aimed to investigate the impact of the Argument-Driven Inquiry instruction (ADI-Based Instruction) in thermochemistry on students' critical thinking skills. This study applied the one group pretest-posttest type of pre-experiment design. The subjects of this study were 71 eleven grade students of Public Senior High School of Ambulu Jember on academic year of 2022/2023. The instrument, namely the critical thinking ability test on thermochemistry, was developed by the researchers based on Ennis' critical thinking ability framework. This test consists of 10 valid items with a Cronbach's Alpha reliability of 0.782. The results showed that thermochemistry instruction carried out using ADI instructional model improve students' critical thinking skills with an N-gain of 0.731 (high category) and Cohen's d-effect size of 1.023 (large effect category) with an intermediate reliability of 0.619 (good categories). These results indicate that ADI-based instruction on thermochemistry can improve students' critical thinking skills. The implication of this study is that ADI-based instruction can be applied to other subjects who have the same characteristics of thermochemistry, namely having contextual, factual, conceptual, procedural, and metacognitive knowledge.
Pengaruh Jenis Alkohol pada Sintesis Alkil Ester dari CPO melalui Reaksi Transesterifikasi Menggunakan Katalis Heterogen CaO-MgO Santoso, Aman; Rizky, M; Sumari, Sumari; Wijaya, Anugrah Ricky; Retnosari, Rini; Asrori, Muhammad Roy
Jurnal Rekayasa Bahan Alam dan Energi Berkelanjutan Vol. 5 No. 1 (2021)
Publisher : Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rbaet.2021.005.01.01

Abstract

Low quality CPO can be made alkyl esters by transesterification reaction by alcohol. The type of alcohol that is often used in the transesterification reaction is methanol but is toxic, so we need an alternative type of alcohol. The purpose of this research is the synthesis of alkyl esters from CPO through transesterification reaction using heterogeneous catalyst CaO-MgO with different types of alcohol. This experimental laboratory research through stages:  CPO refinement, activation of CaO-MgO catalysts,  synthesis of alkyl esters from CPO with two types alcohol, identification of the components of the synthesis compound of the synthesized alkyl ester mixture using GC-MS. The results showed that (1) alkyl esters can be synthesized from CPO through the transesterification reaction with methanol and CaO-MgO catalysts with a yield of 85.72%, while the transformation of ethanol is difficult to form ethyl ether (2) the character of methyl ester synthesized has a density 0.86 g / mL, viscosity 3.23 cSt, refractive index 1.44819, and acid number 0.747 mg KOH / g methyl ester, (3) the main component of the synthesized alkyl ester contains 1,200% methyl myristic compound, methyl palmitate 40,637% methyl linoleate 9.332%, methyl 7-octadecenoate 42.986%, and methyl stearate 4.427%.
Synthesis of EDTA-Functionalized Silica Coated Nanomagnetite as a Cobalt(II) Ion Adsorbent Kusumaningrum, Irma Kartika; Arabillah, Zulfikar Wildan; Kusfianti, Anisa Aulia; Munzil, Munzil; Wijaya, Anugrah Ricky
EduChemia: Jurnal Kimia dan Pendidikan Vol 9, No 1 (2024)
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.v9i1.22639

Abstract

This research aims to synthesize silica-coated nanomagnetite EDTA functionalized (Fe3O4@SiO2-EDTA) to characterize its properties and test its ability to bind Co(II) metal ions. This research was carried out in several steps, including Synthesis of nanomagnetite and characterization via SEM, VSM, XRD, and FTIR; (2) Synthesis of nanomagnetite-coated silica (TEOS) and characterization via SEM, VSM, (3) Synthesis and characterization of silica-coated nanomagnetite with EDTA functionalization (Fe3O4@SiO2-EDTA), and characterization was carried out via SEM, VSM, XRD, and FTIR. (4) Adsorption ability test of Fe3O4@SiO2-EDTA as a Co(II) metal ion adsorbent. EDTA-functionalized silica-coated nanomagnetite was successfully synthesized. Confirmation and characterization of the synthesized material was performed on the basis of the FTIR spectrum band at wavenumber 687 cm-1, which confirmed the formation of magnetite, whereas the absorption band at wavenumber 1092 cm-1 confirmed the formation of a silica coating, and the peak at wavenumber 1617 cm-1 confirmed EDTA functionalization in the material. The peak of the XRD chromatogram is shown in XRD pattern 2, which confirms nanomagnetite, and in silica-coated nanomagnetite, the resulting characteristic peak is the same as the characteristic peak in Fe3O4 except in region 24, which confirms the presence of the silica coating. The magnetization of nanomagnetite before coating was 57 emu/g and that after coating was 48 emu/g. The maximum adsorption ability of the synthesized material for Co(II) ions was 0.1336 mg/g.
The Effectiveness of Aerobic and Anaerobic Methods During Start-up in Biological Shrimp Pond Wastewater Treatment Sanjaya, Eli Hendrik; Amara, Aulia; Hengky Pamungkas, Yahya; Ricky Wijaya, Anugrah; Santoso, Aman; Yulistyorini, Anie; Li, Yu-You; Chen, Hong; Fadhil Md Din, Mohd
The Journal of Pure and Applied Chemistry Research Vol. 12 No. 3 (2023): September-December 2023
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2023.012.03.3309

Abstract

One of the aquaculture wastes is shrimp pond wastewater (SPW). Generally, SPW comes from the rest of shrimp feed, shrimp dung, and died shrimp during the cultivation. As SPW is organic waste, biological wastewater treatment is the best choice. Biological method has low operating costs and environmentally friendly. There are two kind of biological methods, namely aerobic and anaerobic. Both methods have advantages and disadvantages. In this research, the performance of aerobic and anaerobic methods in treating SPW were investigated using batch experiment for more than 200 days. The results showed that the performance of the aerobic system in the initial phase was better than that of the anaerobic system, especially, in phase one which is the adaptation phase. In the first phase, COD, carbohydrate and protein removal in the aerobic system were 25.93%, 75.2% and 88.59%, while in the anaerobic system were 12.82%, 36.03% and 51.01%. In phases 5 to 10, both systems have similar performance with the optimum performance in phase 9 with 6 times substrate dilution. In this optimum phase, the COD removal values are 90% and 85% for aerobic and anaerobic systems, respectively. Meanwhile, the removal of carbohydrates and protein from both systems is about 95%.
Co-Authors Abdillah Al Farraby Aman Santos Aman Santoso Amara, Aulia Anie Yulistyorini Arabillah, Zulfikar Wildan Ayub Indra Bayu Kreshna Adhitya Sumarto Choiril Azmiyawati Daratu Kusuma Eviana Putri Dewi Yuliani, Dewi Dhinarty Umi Rachmawaty Dian Puspita Sari Eli Hendrik Sanjaya Endang Budiasih Estiyawati, Estiyawati Fadhil Md Din, Mohd Farashinta Nadia Hanumi Oktiyani Rusdi Harno Dwi Pranowo Hengky Pamungkas, Yahya Hong Chen I Wayan Dasna Indah Nur Pramesti Jayawarsa, A.A. Ketut Kusfianti, Anisa Aulia Kusumaningrum, Irma Kartika Li, Yu-You Maharani, Chariztya Anggita Mohd Hafiz Dzarfan Othman Muhammad Roy Asrori Muntholib Munzil Nanik Wijayanti Nor Basid Adiwibawa Prasetya Noviyanti, Thjiong Angelina Nurbani Jusuf Nurwarrohman Andre Sasongko Parsaoran Siahaan Purwandari, Intan Diah Puspa Rahmadina Lestari Putra, Helwani Fuadi Sujoko Rachman, Ihsan Budi Rachmawaty, Dhinarty Umi Retno Ariadi Lusiana Retnosari, Rini Rizky, M Salsabila, Arini Suharti Sumari Sumari Surjani Wonorahardjo Syah, Alif Alfarisyi Syavika, Lukluatus Wulan Ratia Ratulangi Yudhi Utomo Yusron Risqy Maulana