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Lilis Lismaya Lismaya, Lilis; Marwoto, Putut; Nugroho, Sunyoto Eko
Jurnal Penelitian Pendidikan IPA Vol 10 No 6 (2024): June
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v10i6.4255

Abstract

The aim of this research is to reduce household organic waste through the use of organic waste as a natural detector of formaldehyde content in food snacks. The organic waste used in this study was red garlic skins, dragon fruit skins and purple sweet potato skins. This research is an experimental research. The stages of the research started with the extraction of anthocyanins from the three organic wastes, direct detection of formalin and detection of food ingredients. The formalin concentrations tested were 0.5%, 1%, 2%, 5% and 25%. Detection ability can be seen from the color change between control and formalin treatment. Garlic skin produces a red extract, dragon fruit skin produces an orange extract, and purple sweet potato skin produces a deep red extract. Test results on 20 samples of food snacks around the campus using the three organic waste extracts proved that all samples contained formaldehyde in varying concentrations. The highest 50% formalin content was found in yellow noodles and meatballs. The conclusion is that purple beetle skin, dragonfruit skin, and red garlic skin can be used as natural detectors for formalin in campus snacks.
The Effectiveness of a Combination of Lime (Citrus aurantifolia.), Lerak (Sapindus rarak) and Jasmine Flower (Jasminum nudiflorum) Extracts as and Environmentally Friendly Corrosion Inhibitor Savitri, Erna Noor; Marwoto, Putut; Nugroho, Sunyoto Eko
Jurnal Penelitian Pendidikan IPA Vol 10 No 3 (2024): March
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v10i3.6364

Abstract

Corrosion can also be defined as the forced destruction of metal by the surrounding medium which is usually a liquid (corrosive agent). Corrosion prevention processes can be carried out, including by coating the metal surface, cathodic protection, adding corrosion inhibitors and so on. Several types of inhibitors that have been widely used in industrial applications are synthetic chemical inhibitors. However, the compounds of inhibitors are environmentally unfriendly, toxic and expensive. To overcome this problem, it is necessary to develop an environmentally friendly alternative corrosion inhibitor or better known as a green inhibitor. This research aims to test the effectiveness of using a combination of lime (Citrus aurantifolia.), Lerak (Sapindus rarak) and jasmine flower (Jasminum nudiflorum) extracts as an environmentally friendly corrosion inhibitor. The results obtained were inhibitors in the form of a combination which were added to the corrosive medium HCl which could reduce the rate of aluminum corrosion. This research also shows that time and concentration influence the corrosion rate. A higher concentration (200 ppm) has a greater inhibitory power than a concentration of 100 ppm. The best inhibitory power is found in 200 ppm inhibitor with a soaking time of 20 minutes
Feasibility Test of Osteichthyes Wet Preparations through the Utilization of Chitosan on Storage Quality as Practical Media for Vertebrate Zoology Sugandi, Muhamad Kurnia; Marwoto, Putut; Nugroho, Sunyoto Eko
Jurnal Penelitian Pendidikan IPA Vol 10 No 5 (2024): May
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v10i5.6462

Abstract

This study aims to evaluate the use of chitosan as a substitute for formalin in making wet preparations of true bony fish (Osteichthyes) and to assess the feasibility of storing them as practicum media in the Vertebrate Zoology course. Osteichthyes body size varies from 1 cm to 6 meters. The main characteristic of Osteichthyes is the presence of a skeleton consisting of native bone and a hard calcium phosphate matrix. The skin is protected by various types of scales, including ganoid, cycloid, or stenoid scales. The research method used is Experimental Research Method with descriptive approach, which includes hedonic test and shelf life test (organoleptic) through panelist participation. Tilapia (Oreochromis niloticus) was used as the specimen in this experiment with variations in chitosan concentration of 0.50, 1.50, 2.50, and 3.50%. The study included evaluation of Osteichthyes wet preparations by considering aroma and odor, texture, color, as well as monitoring storage stability for one week. The results showed that the wet preparation using chitosan concentration of 3.5% gave satisfactory results for the observation of Osteichthyes structure. In addition, the storage evaluation showed that the quality of the preparations could be well maintained over a certain period. This indicates that chitosan can be an effective alternative in making Osteichthyes wet preparations for Zoology practicum
The Electrical Characteristics of Fruit Peel Waste as a Biobattery in Terms of Fermentation Time and Coconut (Cocos nucifera L.) Pulp Concentration Fatimah, Siti; Marwoto, Putut; Nugroho , Sunyoto Eko
Jurnal Penelitian Pendidikan IPA Vol 9 No SpecialIssue (2023): UNRAM journals and research based on science education, science applic
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9iSpecialIssue.6477

Abstract

Bioenergy is an alternative energy that utilizes various types of organic waste that can generate electricity. The purpose of this study was to determine the effect of fermentation time and coconut pulp concentration on the electrical characteristics of durian fruit skin, banana fruit skin, and cassava skin waste as an alternative energy source. The electrical characteristics observed were the voltage generated by fruit peel waste based on fermentation time and coconut pulp concentration. This research is a laboratory-based experimental research. The results of the study showed that: 1) the length of fermentation time affects the voltage generated by durian skin, banana skin, and cassava skin; 2) the fermentation time to produce the best voltage is the fourth day (96 hours); 3) the longer the fermentation time, the lower the voltage generated; 4) coconut pulp concentration affects the voltage generated by durian skin, banana skin, and cassava skin; 5) the ratio of 25% coconut pulp concentration and 75% raw material concentration becomes the ratio that produces the best voltage; 6) durian fruit peel waste has the highest voltage compared to banana fruit peel and cassava peel waste, both in terms of fermentation time or coconut pulp concentration. 7) cassava peel waste has a higher potential difference resistance than other skin waste
Antifungal Activity of Ethanol Extract of Stem Bark And Fruit Flesh of Baccaurea Lanceolata Against Fungi Causing Skin Infections Sasmita, Media; Marwoto, Putut; Nugroho, Sunyoto Eko; Sumarni, Woro
Jurnal Penelitian Pendidikan IPA Vol 11 No 5 (2025): May
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i5.10075

Abstract

Indonesia has a diversity of medicinal plants that are used by the community to treat various diseases. Indonesian people often experience skin problems caused by fungi. The high number of cases of fungal diseases is due to the high air humidity in the tropics, thus supporting the growth of fungi that cause skin infections. This study examines the phytochemical content and antifungal activity of Baccaurea lanceolata (lempaung) plants. The parts of lempaung used as samples are the stem bark and fruit flesh. Samples were taken in Bioa Sengok Village, Rimbo Pengadang District, Lebong Regency. Antifungal testing was conducted at the Chemistry Education Laboratory and Microbiology Laboratory of Bengkulu University (UNIB) from January to June 2022. Antifungal activity testing uses the disc diffusion method by immersing the disc into the ethanol extract of lempaung. The test fungi used were C. albicans, M. furfur, and T. mentagrophytes. The results of phytochemical tests showed that the stem bark and fruit flesh samples of lempaung contained alkaloids, flavonoids, tannins, saponins, steroids, and terpenoids. The antifungal activity test results showed that the samples had inhibition against C. albicans, M. furfur, and T. mentagrophytes.
Development of Learning Modules Using an Ethnoscience-Based Project-Based Learning Model to Enhance Students' Collaboration, Critical Reasoning, and Creativity Fania Fitriana Rosita; Putut Marwoto; Deni Setiawan
Journal of Primary Education Vol. 13 No. 1 (2024): June 2024
Publisher : Universitas Negeri Semarang

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

Abstract

The Ministry of Education, Culture, Research, and Technology emphasizes the improvement of students' character through various strategies focused on creating Pancasila Students. The main challenges at SDN Manyaran 2 include low collaboration among students and the need to improve critical and creative thinking skills. The study aims to develop, test feasibility, and evaluate the effectiveness of a Project-based Learning module based on Ethnoscience on Light and its properties for fifth-grade students, focusing on improving cooperative skills, critical reasoning, and creativity. This research follows the ADDIE development model, which includes analysis, design, development, implementation, and evaluation stages. Data collection methods include interviews, questionnaires, observation, documentation, and tests. This research was conducted in the fifth grade at SDN Manyaran 2 in Semarang, involving 28 students. The results showed that the development of the learning module was deemed highly feasible, with validation scores for media, content, and language and responses from teachers and students reaching 100%. The product's effectiveness improved students' collaboration, critical reasoning, and creativity. The research results offer students a rewarding and meaningful learning experience, encouraging their ongoing growth and learning motivation. Thus, using a learning module with Project-based Learning Based on Ethnoscience received a highly feasible validation and positively impacted enhancing students' collaboration, critical reasoning, and creativity.
The Effectiveness of Contextual-Approach Science E-Module Integrated with Local Wisdom on Pressure Topic to Improve Critical Thinking Skills Hidayat, Edy; Marwoto, Putut; Widiyatmoko, Arif
Journal of Innovative Science Education Vol. 13 No. 2 (2024): August 2024
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jise.v13i2.9272

Abstract

Integrating local wisdom into science materials is a crucial effort to create contextual learning and instill noble values and a sense of cultural appreciation. Each region requires education tailored to its unique characteristics for effective educational development, necessitating a contextual approach. Incorporating local wisdom values is an essential step in this process. This study aims to develop a contextual science e-module that integrates local wisdom to enhance students' critical thinking skills. The research employed a Research and Development (R&D) approach, specifically using the Sugiyono model. The results indicated that the e-module received a validation score of 97% from material experts, categorized as very valid, and 96% from media experts, also categorized as very valid. The practicality test assessment yielded a value of 98% and was rated as very practical, and student feedback resulted in a score of 98%, which was deemed very good. Additionally, the effectiveness of the e-module was evaluated through the N-Gain score for critical thinking skills, which averaged 0.83, placing it in the high category. The N-Gain value for students' critical thinking skills was 89.95%, classified as effective. Based on the validation, readability, practicality, and effectiveness assessments, the contextual-approach science e-module integrated with local wisdom is deemed feasible as a learning resource.
Analisis Kemampuan Pemahaman Konsep Matematika Siswa Materi Perkalian Ditinjau Dari Tingkat Kesalahan Siswa Paut, Livia Eunike; Kartono, Kartono; Zaenuri, Zaenuri; Marwoto, Putut
Haumeni Journal of Education Vol 5 No 3 (2025): Edisi Desember 2025
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/haumeni.v5i3.25766

Abstract

Penelitian ini dilakukan untuk menganalisis kesalahan murid dalam mengerjakan operasi perkalian, ditinjau dari pemahaman konsep matematika. Subjek dalam penelitian adalah 57 murid sekolah dasar di Kabupaten Kupang, Nusa Tenggara Timur. Penelitian ini menggunakan metode deskriptif dengan pendekatan Newman’s Error Analysis (NEA) untuk mengidentifikasi dan mengklasifikasikan jenis-jenis kesalahan murid. Hasil penelitian menunjukkan bahwa kemampuan pemahaman konsep matematis murid masih tergolong rendah, dengan persentase ketuntasan hanya sebesar 24,2%. Murid masih banyak melakukan kesalahan dalam pengerjaan soal, dengan persentase kesalahan yang sangat tinggi pada indikator pertama dan ketiga, yaitu masing-masing 88,6% dan 94,7%, serta berada pada kategori sedang untuk indikator kedua sebesar 44%. Jenis-jenis kesalahan yang teridentifikasi meliputi reading error, comprehension error, transformation error, process skill error, dan encoding error. Kesalahan-kesalahan tersebut menunjukkan bahwa rendahnya kemampuan pemahaman konsep perkalian menjadi faktor utama yang menyebabkan murid mengalami kesulitan dalam menyelesaikan soal-soal operasi perkalian.
Improving Computational Thinking Skills Through The Implementation of Project-Based Learning According to Student Differentiation in Physics Learning Rita Iva Fatmala; Putut Marwoto; Ellianawati Ellianawati
Physics Communication Vol. 9 No. 1 (2025): February 2025
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/pc.v9i1.927

Abstract

The research aims to determine the effectiveness of project-based learning by paying attention to student differentiation to improve computational thinking skills. The research is based on students' computational thinking skills, which are still below standard, namely below of 50% at each stage, including decomposition, pattern recognition, abstraction, and algorithms. This research is classroom action research carried out over three learning cycles. The results of the research show that there is an increase in students' computational thinking skills in each learning cycle given. In the first and second cycles, the level of achievement of students' computational thinking skills reached 22.8% and 54.29%, meaning that what was originally in the very low category became low. After that, in the third cycle the level of achievement of students' computational thinking skills in the high category reached 88.57%. The gain test results in the first and second cycles were in the medium category with n- gain scores of 0.40 and 0.52. Furthermore, in the third cycle, an n-gain of 0.71 or high category level. These results indicates that the implementation of project-based learning according to student differentiation in physics learning was effective in improving computational thinking skills.
Development of STEM Based Physics E-Modul with Virtual Lab to Improve Learning Outcomes Muhammad Dzaki Fuad Salim Putra; Bambang Subali; Putut Marwoto
Physics Communication Vol. 9 No. 1 (2025): February 2025
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/pc.v9i1.8343

Abstract

The Merdeka curriculum organizes the physics subject into concept understanding and science process skills. However, based on interviews and observations at MAN IC Pekalongan, the development of process skills in physics learning is rarely facilitated due to the limited availability of learning media and time. This RnD research aims to develop digital learning media as an alternative solution to these problems. The analysis of learning media needs showed that teachers and students need Interactive E-Modules as learning media, applications of physics in everyday life such as STEM, and a Virtual Lab packaged with interactive and simple language. The E-Module was validated by several experts in material, learning media, and learning and was declared highly feasible with an average score of 4.5 out of 5. The posttest results showed an average score of 59.67 for both the experimental and control classes. The n-gain analysis demonstrated that the E-Module effectively improved conceptual understanding, with an n-gain value of 0.74 (high), and had a positive effect on process skills with an average value of 87.86 for the experimental class and 86.44 for the control class, with a significance value of 0.032 in the independent sample test of both classes.
Co-Authors - Sugianto - Sutikno Abu Bakar, Suriani Achmad Sopyan Afifah, Rachma Agus Yulianto Ahmad Minanur Rohim Almira Syifa Anak Agung Gede Sugianthara Andi Mursidi Andi Mursidi Ani Rusilowati Arie Rusmiyati Arif Widiyatmoko, Arif Aristawati, Ika Vidiasari Aristiani, Erni Ariwibowo, Litasari Aldila Aryono Adhi, Aryono Astuti, Nurul Heni Atuzzuhro, Qoni' Ayu Nur Azizah Ayu Riyanti, Galuh Ayun, Qurrota Azizah Mutiarani Azizah Zhafirah Babiera II, Rene M. Bagus Addin Hutomo Bagus Addin Hutomo Bagus Addin Hutomo, Bagus Addin Bambang Subali Bambang Subali Bambang Subali Bambang Tri Nugroho Bambang Tri Nugroho Brian Priyangga Budi Astuti Budi Astuti Budi Astuti Budi Naini Mindiyarto Budi Naini Mindyarto, Budi Naini Cahya Wulandari Chintya, Julien Darsono, Teguh Deni Ebit Nugroho DENI SETIAWAN Dharma Putra, Ngurah Made Didi D. Anggoro Didi Dwi Anggoro Didik Aryanto Didik Aryanto Didik Aryanto Dirgantara, Marvinda Rizki Dita Durrotun Nafisah Durrotun Nafisah Dyah Rini Indriyanti Edy Cahyono Edy Cahyono Edy Cahyono Edy Hidayat Elda Herlina Eli Trisnowati Ellianawati, Ellianawati Endang Susilaningsih Endang Susilaningsih Enni Suwarsi Rahayu Erna Noor Savitri, Erna Noor Erni Suharini F. Shoufika Hilyana Faiz Mudhofir Fania Fitriana Rosita Farid Ahmadi Fatiatun, Fatiatun Fauzi Ahmad Muda Fianti Fianti Fianti, Fianti Fina Fakhriyah Firdaus Firdaus Fitroh, Ummi Nuzulul Gelu, Afrianus Hadi Sumarto Hadi Susanto Hajar Mawaddah Handayani, Sri Handhita, Emye Tegar Hanifah, Desty Putri Hanik Aida Hardi Suyitno Harjito Kusmanto Harra Hau, Rambu Ririnsia Hartono Hartono Hartono Hartono Hasni, Nur 'Ainiyyah Herdini, Resty Ayu I. Istadi Ida Zulaeha Ima Ismiati Imania, Yayang Fatma Imron Imron, Imron Intan Kusumawati Intan Kusumawati Isa Akhlis Iskandar, Hasbi Istadi Istadi Iwan junaedi Jafri Haryadi jalaluddin, wahyu Kartono - Kartono, Kartono Kasmadi Imam Supardi Khairiah, Khairiah Kurnia, Wanda Hesti Kurniawan, Aziz Kusnanto Mukti Wibowo Lathif, Yuniar Fahmi Lewa, Ismira Wahyu Lestari Lia Afriyanti Nasution Lilis Lismaya Luqman Hakim M Hidayatur Rohman M. Hidayatur Rohman M. Hidayatur Rohman M. Hidayatur Rohman Mahardika Prasetya Aji Mahardika Prasetya Aji Maria Agatha Hertiavi Masturi Masturi Minhat, Minhat Mohamad Ayubi, Dimas Mohammad Agus Prayitno Mufida, Aina Muhammad Dzaki Fuad Salim Putra Muhammad Habib Ramadhani Mujib Ubaidillah Muqoyyanah Muqoyyanah Muqoyyanah Muqoyyanah Muqoyyanah Mursidi, Andi Mushthofa, Zayyinul Muslimah Susilayati Mutiarani, Azizah Muttaqin, Rodhotul Muttaqin, Rudhotul Nada, Nadila Qotrun Nafiusokhib Naila Nur Niswatul Ula Nathan Hindarto Ngurah Made Dharma Putra Noor, Yusmaniar Afifah Novita, Mery Noviyatun, Siti Nugroho , Sunyoto Eko Nur Hamid NUR HAMID Nursidhi, Nursidhi Nyi Mas Ayu Ratna Gumilar Obimita Ika Permatasari Panca Dewi Purwanti Panca Dewi Purwati, Panca Paut, Livia Eunike Pratiwi Oktaviani, Pratiwi Prayitno, Wasi Sakti Wiwit Putra, Ngurah Made Darma Putra, Ngurah Made Dharma Putri Pratiwi Lestari Qurrota Ayun Ratna Dewi Kusumaningtyas Retno Sri Iswari Reza Faizal, Reza Rina Wati Riska Septianita Rita Destini Rita Iva Fatmala Riyanti Riyanti Rofi'ah, Siti Hidayatur Rofiatul Zannah Rofiatul Zannah, Rofiatul Rosmeita Ayu Budiarti Ruhama Desy M Rusdiyana Rusdiyana Ruwiyatun Ruwiyatun S Sulhadi Sarwi - Sarwi Sarwi Sarwi Sarwi Sarwi Sarwi Sarwi Sarwi Sarwi Sarwi Sarwi Sarwi Sasmita, Media Setiawan, Puji Agus Setyaningsih, Natalia Erna Shofwan Ridho Sigit Priatmoko Sigit Priyatmoko Sigit Saptono Siregar, Sofiyan Siti Fatimah Siti Hanifa Ari Utami* Siti Hardiyanti Hasasiyah Siti Hardiyanti Hasasiyah Siti Hardiyanti Hasasiyah, Siti Hardiyanti Siti Wahyuni Sopyan, Achmad Sri Haryani Sri Lestari Handayani Sri Mulyani Endang Susilowati, Sri Mulyani Endang SRI WARDANI Sri Wardhani Sudarmin Sudarmin Sudarmin Sudirman Sudirman Sugandi, Muhamad Kurnia Sugianto - Sugianto Sugianto Sugianto Sugianto Sugito Sugito Sugiyanto - Suharto Linuwih Suherman Suherman Suherman Suherman Sujarwata Sujarwata, Sujarwata Sulhadi Sulhadi - Sulhadi Sulhadi Sulistiyo Rini, Ari Sundari Sundari Sundari Sundari Sungkowo Edy Mulyono Sunyoto Eko Nugroho, Sunyoto Eko Supriadi Rustad Supriyadi Supriyadi Supriyadi Supriyadi Suryani Abu Bakar Suryaningsih, Yuliana Susilo Susilo Suyanto Suyanto Syaifuddin Syaifuddin Teguh Darsono Tri Agung Prasetya Tri Maria Wea Ulia Anisatur Rosidah Upik Nurbaiti Wahyu Hardyanto Wahyuningsih, Diana Arin Wawan Wawan Widya Nugraheni Widiningrum Wijanarko, Andrian Gandi Winarto Winarto Wiyanto - Wiyanto Wiyanto Wiyanto Wiyanto Woro Sumarni Yanti Yanti Yanti Yanti Yazid, Muhammad Abdau Yuliana Suryaningsih Yuniar Fahmi Lathif Zaenuri Mastur Zahrotul Aini, Zahrotul Zayyinul Mushthofa Zhafirah, Azizah