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Journal : EduChemia: Jurnal Kimia dan Pendidikan

Natural Dyes Characterization of Local Plants as Acid-Base Indicator Nelly Dayanti; Silpia Vilda Saputri; Arit Arit; Rini Muharini; Masriani Masriani
EduChemia (Jurnal Kimia dan Pendidikan) Vol 5, No 1 (2020)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1261.428 KB) | DOI: 10.30870/educhemia.v5i1.7512

Abstract

Hanjuang, mangosteen, putat, and tabelian plants are used by people of Lanjak deras Village as natural dyes for woven cloth and food so that they can be used as an alternative substitute synthesis indicators that are limited in a remote area. The purpose of the study is to determine the best type of solvent in extracting the samples, pH range, UV spectrum profiles, precision, and accuracy of the plant's extract as indicator. The sample was the plants that are used by the people of West Borneo as natural dyes, namely putat flower, tebelian stem, mangosteen leave, and hanjuang leave. Each sample was macerated with four types of solvents, namely aquadest, ethanol, methanol, and (1:1) ethanol:methanol, then the extract was testing by pH range. The extracts providing color changes were determined for its UV-Vis spectrum profile, stability, accuracy, and precision. The results showed that ethanol and methanol were suitable for extracting mangosteen leaves, methanol for putat flowers, ethanol for hanjuang leaves, and (1: 1) ethanol:methanol for tebelian stems. Mangosteen leaf extract, putat flower, and tebelian stem gave a pH range of 12-14, while hanjuang leaf extract did not change color. The phytochemical test results and UV spectrum profile of mangosteen leaf extract, putat flower, and tebelian stem indicated the presence of phenolic compounds. The powder and extract solution had high stability. Mangosteen leaf extract, putat flower, and tebelian stem had precision and accuracy with the medium category. These data indicated that mangosteen leaf extract, putat flower, and tebelian stem have potential as indicators of acid-base.
Development of Biochemical Practice Guide Website Based on Guided Inquiry on Amilum Identification Materials Agustinus Ridwan; Masriani Masriani; Rody Putra Sartika; Hairida Hairida; Rini Muharini
EduChemia (Jurnal Kimia dan Pendidikan) Vol 7, No 1 (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.v7i1.12607

Abstract

The COVID-19 pandemic has changed the paradigm of the online learning process, which was originally running offline. As a result, facilities and infrastructure, such as practical guidebooks used to support implementing practical activities, must adapt to online conditions. Website-based technology-assisted practicum guides are the right strategy for online learning. In addition, learning activities on the practicum guide website use a contextual approach, such as the guided inquiry method, to train students to develop their critical and scientific thinking skills. However, the reality on the ground shows that the practicum guide used is not website-based, so it has not been able to support learning during the COVID-19 pandemic, and the learning model used has not used the guided inquiry method. This study aims to develop a guided inquiry-based biochemical practicum guide website on starch identification material and determine the feasibility of the website as well as student and lecturer responses to the developed website. This research is development research using the Borg and Gall model. Their research stages consist of needs analysis, planning, product draft development, initial field trials, revisions, field trials, and revisions. The practicum guide website was validated by 11 experts consisting of 2 language experts and three experts in IT, materials, and guided inquiry learning. They collect feasibility data and student and lecturer responses using indirect communication assisted by questionnaires. The feasibility test results of linguistics, IT, inquiry learning, and material experts obtained percentages of 88.3%, 85.5%, 90.5%, and 91.1%, respectively. All aspects show a very decent category. Student responses at the initial field test stage, main field, and lecturer were 85.7%, 88.3%, and 90%, respectively. All aspects of the feasibility test, student and lecturer responses are in the very feasible category. The results of this study indicate that the guided inquiry-based biochemical practicum guide website on starch identification material is very feasible to use. This practicum guide website is expected to help carry out a biochemistry practicum during the COVID-19 pandemic and improve students' thinking skills
Development of pH Measuring Strip Test Based On West Kalimantan Local Plant Aprianus Aril; Masriani Masriani; Husna Amalya Melati
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.v7i2.15252

Abstract

Synthetic acid-base indicators possess some disadvantages. Therefore, it is necessary to develop a natural acid-base indicator made from a mixture of plant extracts, which has a strip form, is safe, eco-friendly, has a wide pH range, and has clear color changing. This research aims to determine the pH range, make a pH indicator in the strip form, and produce a biodegradable acid-base indicator made from a mixture of Melastoma malabathricum flower, Dioscorea alata rhizome, Syzygium paniculatum leaves, Garcinia fruit peel, Eleutherine bulbosa rhizome extracts. Plant extracts were obtained using the maceration method. pH range was evaluated using the visual method by sensing the color changing in the pH range from 1 to 14. pH indicator strip was made by applying filter paper in the strip form into the extract mixture for 2 hours. The biodegradable property of acid-base indicator strips was established by measuring indicator strip degradation after planting it in the ground for 20 days at room temperature. The results showed that the acid-base indicator strip made from a mixture of plant extracts was able to give a color change from pink to light green in the pH range of 3-8 and can be decomposed completely after planting it in the ground for 20 days. Thus, it indicated that a natural pH indicator strip based on West Kalimantan plants has the potential to be developed as a safe and effective acid-base indicator to substitute synthetic acid-base indicators. 
Co-Authors A.A. Ketut Agung Cahyawan W AA Sudharmawan, AA Abd Hakim Laenggeng, Abd Hakim Abd. Hakim Laenggeng, Abd. Hakim Abdul Hafiz, Iqbal Abdul Hakim Laenggeng Abdullah Abdullah Abdurrohman Wahab Achmad Ramadhan Ade Mirza Afandi Afandi Afif Noor Agnes Maria Janni Widyawati Agnes Maria Janni Widyawati Agung Hartoyo Agusta, Muhammad Farras Leonasa Agustinus Ridwan Ahmad Yani T Aini Zahra Aisyah Nur Pratiwi Aisyah Saleh, Nur Ajuk Sapar Ajuk Sapar Ajuk Sapar4 Akrom, Akrom Al Mu’min, Muhammad Ridhwan Aladawiyah, Aladawiyah Albertus, Amos Aldri Frinaldi Aloysius Mering Amalia, Diza Nurul Amat, Amat Amiruddin Kasim Amran Rede Amsal Alhayat Anah Setiawati Anastasia Ilin Andi Asrafiani Arafah Andi Hairil Alimuddin Andi I. Harun Andi Ifriany Andi Ihwan Andriyani, Putri Anggi Fatmadiwi Aninda, Dea Anisa Fitri Annisa Utami Antonius Antonius Aprianus Aril Aprilya, Dinda Apriyani Apriyani Arafah, Andi Asrafiani Arit Arit Arsitas, Dian Ashari, Abdul Asifah, Nur Asma Asma Asriah Nurdini M. Astriani Natalia Br Ginting Azwa Fadilla Wafiq Bakri Hasanuddin Bella Agustina Bilqis, Adilla Bustamin Bustamin Cahyani, Indah Regita Cahyani, Melur Regista Chairul Chairul Chorina, Malisa Claudina Marditha Damayanti, Alfina Darsah, Mohammad Datubaringan, Jein Dea Aninda Defiana Aliyatur Rosidah Delima, Nur Depasthika, Sistha Citra Devianti, Rika Dewi Tureni Dewi, Melyana Dian Ria Puspita, Dian Ria Diana Pujiningsih Dianni Dina Liana Dinda Kartika Wijayanti Dita Nurlina Dona Fitriawan Dzul Fadly Effendy, Mutiara Eka Kartina Ekowati Handharyani Elisa Futri Elsye Apriliantika Engga, Mardinus Eni Mayasari Eni Mayasari Eny Enawati Eny Enawati Eny Enawati Eny Enawaty ERDAWATI, SRI Erlina ERLINA Erlina - - Erlina Erlina Erlina Erlina Erlina Erlina Erma Susanti Ersando Ersando Ersando Ersando Ersando, Ersando Erwina Oktavianty Eti Nurwening Sholikhah Fadhilah, Raudhatul Fadila, Rismayana Fadli Fadli Fadly Yashari Soumena Fadly, Dzul Faisal Afda’u Fajar Suwarno, Fajar Falah, Syauqi Muhammad Shobibul Farida Mayar Farida Setiawati FATIMA, SITI Fatma Dhafir Fatmadiwi, Anggi Fatmah Dhafir Febriani, Vita Indri Fia Tiaraseta Firman Shantya Budi Firra Meliana Pratiwiningrum Fita Kurniasari Fithri Anggraini Fitri, Rosiana Gerina, Febrilia Gibran, Muhammad Hafiz, Muhammad Iqbal Abdul Hairida Hairida Hamdani Hamdani Hamsa, Hamsa Hanif, Faizira Nur Hanifa, Elsa Hardiyanti, Masitoh Hariyani, Cici Hariyanti, Weni Hasibuan, Nikmah Hasmini F17111019, Hasmini Hazarianti, Putri Helsa Ulfa Destari Henny Herawaty Herniawati Herniawati Herniawati, Herniawati Hidayat, Niko Hj. Musdalifah Nurdin Hotimah Hotimah Husna Amalya Melati Husna Amalya Melati Husna Amalya Melati Husna Amalya Melati Husna Amalya Melati Husna Amalya Melati Husna Amalya Melati Husnia Hilmi Wahyuni I Made Budiarsa I Nengah Kundera Idris Idris Ifriani, Andi Ifriany, A. Ifriany, Andi Ifriany, Andy Iis Puspa Subekti Ika Kania Fatdo Wardani Indah Dwiprigitaningtias Indri Astuti Ino Talino Iqbal Abdul Hafiz Ira Lestari Ira Lestari Ira Lestari Ira Lestari, Ira Lestari Irene Yudea Listra Irfan Maftuh Iskandar, Ratnasari Isnaini F17111035, Isnaini Isninar, Isnainar Istamarra Aditya Aninindya Istikomah Istikomah Istikomah, Istikomah Istikomah istiqomah istiqomah Istiqomah Istiqomah Jaya, Andi Eka Putra Juli Ana Jumarang, Ishak Kalijunjung Hasibuan Karmila karmila karmila Khofifah Aditha Parawansa Khofifah Aditha Parawansa Khofifah Aditha Parawansa Krestian, Hery Kristiando Siburian Kundera, I Negah Kusudaryani, Praditya Adi Laenggen, Abd. Hakim Laili Fitri Yeni Lestari M.P Alibasyah Liana, Dina Lilies Lilies Lilies N Tangge Lisa Lisa, Lisa Listiani, Etma Listra, Irene Yudea Luh Beti Karmia Lukman Hadi Lukman Hadi Lukman Hadi Lukman Hadi, Lukman Lukman Hakim Maftuh, Irfan Maharani Nukila Manap Trianto marbela, lilis Mardasela, Tery Mardin, Mardin Margareta Lita Widiansari Maria Ulfa Maria Ulfah Maria Ulfah Maria Ulfah, Maria Ulfah Marisa Marisa Markus Suryo Utomo Markus Suryoutomo Maruf Maruf, Maruf Maryani Maryani Maryani Maryani Maryati, Riski Neli Maskus Suryoutomo Masri, Esther Maulina Diah Maulina Diah Maya Sari Meikasari, Anisa Putri Meisi Nur Seratih MELANIA, PURNAMA Melur Regista Cahyani Meri Meri Mieke Anggraeni Dewi Miftahul Kautsari Mirnawati, Nurul Aini Mohammad Jamhari Monica, Icha Monica, Qois Monica, Sarah Muh. Ishak Jumarang Muhammad Anggung Manumanoso Prasetyo Muhammad Arifin Muhammad Farras Leonasa Agusta Muhammad Gibran Muhammad Iqbal Abdul Hafiz Muhammad Jamhari Muhammad Ridhwan Al Mu’min Muhammad Sodikin Muhammad Syahrizal Mukhtar, Raine Ramdhanya Munawaroh, Faridatul Mustamiroh, Mustamiroh Mustofa Mustofa Mustofa Muttalib, Yuges Saputri Nadila, Andi Nadila, Nadila Nahria, Syarifatun Nani Zurahmah Nanik Yuningsih Natasya, Qois Neisya Benhadj Neli Maryati, Riski Nelly Dayanti Neni Haryani Ningsih, Kurnia Ningsih, Sri Rahayu Noprianti, Dini Nova Citra Novi, Winda Cinthia Novirianti, Novirianti Nugroho, Very Sapto Nur Ainun Nur Atika Nur Haliza Nur Zaqiyyah Nurhalimah, Risna Nurhamijah Nuria, Rika Nurlinda, Andika Nurmala Nurmala Nurpaisah, Nurpaisah Nurul Salima Oktariani, Desy Oktavia, Rini Parawansa, Khofifah Aditha Pasaribu, Revi Lestari Peter Proksch Pingkan Ramadhan Sailendra Pingkan Ramadhan Sailendra Pinta Rini Harpiyani Pitri, Rosiana Pranata, Rio Pratami, Hutianas Muhar Pratiwi, Bella Pratiwi, Divya Indah Pricylia Chintya Dewi Buntuang Purnama Melanie Purwandi, Oktavianus Eduardo Purwanto, Sandi Purwasih, Lidya Sri Putra, Rody Putri Yuli Utami Putri, Regina Triana Putriyani Putriyani Qhatimah, Saripa Husnul Rachmat Sahputra Rachmat Sahputra Rachmat Sahputra Rachmat Sahputra Rachmat Sahputra Radhiana, Ainun RAFIQA RAFIQA, RAFIQA Ragil, Ragil Rahayu, Irma Septi Rahma, Saparina Rahmad Ulwan RAHMAN, ARIVAIE Rahmat Rahmat Rahmat Rasmawan Rahmatul Amin, Dewita Rakhmaji, Iqbal Ramadhan Sailendra, Pingkan Ramadhanti, Yana Razoki, Razoki Renaningtyas, Agneviana Pratikta Ditya Reski, . Rico Hediyansah Ridho Pakina Ridho Pakina Rika Silviani, Rika Rini Muharini Risya Sasri Risya Sasri Risya Sasri Riyanti, Ririt Riyanto, Izory Roman Robiatul Adawiyah Rody Putra Sarti Rody Putra Sartika Rosita F02111011, Rosita RR. Ella Evrita Hestiandari Rudi Heryanto Rudiyansyah Rudiyansyah Rudiyansyah Rudiyansyah, Ruqiah Ganda Putri Panjaitan Sabdaningtyas, Katherina Sahputra, Rachmad Sahputra, Rahmat Sailendra, Pingkan Ramadhan Sakur, Muhammad Samekto Wibowo Samekto Wibowo Sandi Yoga Pradana Saryana Sasri, Risya Sastria, Andi Seilendra, Pingkan Ramadhan Selina, Selina Sembiring, Rinawati Shamdas, Gamar B.N. Shantya Budi, Firman Siahaan, Gorga Josua Chrisvandoli Sigit Irianto Silpia Vilda Saputri Simamora, Andronikus Wp Siska Putri Damayanti Sitti Aminah Sri Lestari Sri Rahayuningsih Sri Wahyuni Sri Wahyuni Sriwahyuni, Eko Stephanus Sahala sukriadi sukriadi Sultra Tari Suryoutomo , Markus Susanto, Ary Susi Iravati Susi Iravati Susi Susanti Sutrisnawati Mardin Syamsul Bahri Syamswisna , Syarifudin Syarifudin Syarifudin Syech Zainal Tari, Sultra TATI NURHAYATI Tatu Maesaroh TETI SUSANTI Tiara Tiara Tiara, Tiara Toyib Bikoir Tresna Kurniawati Trisanty, Yulia Trisnawati, Resty Tulus Djunanto Tulus Gover Sirigo Ringo Tulus Junanto Tulus Junanto Tumale, Serli Ulandari, Uci Umi Maftuhah Sandra Utami, Putri Yuli Utin Thiya Novasari, Utin Thiya Verya Adithya Violeta, Cornelia Virahmi, Virahmi Vita Oktavianty Waginah, Nur Wahdah Aliyah Wahyuni, Resti Putri Wardatullatifah, Ince Siti Warohmah, Mawaddatul Warsidah Warsidah Warsidah Warsidah Warsidah, Warsidah Wasmen Manalu Widian Sari, Margareta Lita Widyasari, Ida Ayu Made Tania Wikke Prawitaningtyas WILDA, WILDA Windarsih, Yulia WOLLY CANDRAMILA Yeni Triana Yuges Saputri Muttalib Yulianti Yulianti Yunianto, Andi Eka Yunita Puspasari Zakia, Zakia Zasmita, Eka Zulfa Zakiah Zulfan Z Zulfan Z, Zulfan Zulfikar Zulfikar