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Articles

The Use of a Modest Alcohol Meter Maria Agatha Hertiavi; Putut Marwoto; Retno Sri Iswari; Edy Cahyono
Jurnal Penelitian Pendidikan IPA Vol 7 No SpecialIssue (2021): December
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v7iSpecialIssue.841

Abstract

During the pandemic, healthy life behavior is needed in an attempt to reduce the transmission risk.  One of them could be done by washing hands. Various human activities may not allow them to wash their hands frequently, for example, using hand sanitizer to wash hands. Hand sanitizer or Isopropyl based alcohol are recommended materials by WHO to clean bacteria on hands. Storing hand sanitizer for a longer time leads to inaccurate quality of the hand sanitizer to the written quality on the package. A simple alcohol meter is designed to test the liquid percentage of hand sanitizer or Isopropyl Alcohol (IPA) based alcohol. The required materials are easy to get from the surrounding environment. Thus, this device could be established at home without ignoring the health protocol. Although it has strength IPA-based alcohol or hand sanitizer is also risky if it is incorrectly used
Developing PTS Device (pH, TDS, and Salinity) to Determine the Water Quality for Cultivating Milkfish (Chanos chanos Forsk) in Pati District Fina Fakhriyah; Putut Marwoto; Edy Cahyono; Retno Sri Iswari
Jurnal Penelitian Pendidikan IPA Vol 8 No 1 (2022): January
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v8i1.1043

Abstract

The importance of water management for milkfish cultivation determines the yields. This research aims to find the performance specification and pH, TDS, and Salinometer measurement (PTS) design validity and relevance. These tools are combinations from various sensors connected by Arduino nano 328 system, pH meter analogue, turbidity, and salinity measurement sensors complemented by Liquid Crystal Display and battery. They are connected by data cable. The findings showed that 1) the system’s performance specification was applying copper electrodes as the salinity, turbidity, and pH meter sensors. The Arduino system did the readings of the data. 2) the device-design specification was valid and relevant to measure the pond water quality for cultivating milkfish (Chanos chanos Forsk). 
Characterization of Spent Coffee Grounds in the Community as Supporting Materials for Renewable Energy Muslimah Susilayati; Putut Marwoto; Sigit Priatmoko
Jurnal Penelitian Pendidikan IPA Vol 8 No 2 (2022): April
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v8i2.1227

Abstract

Coffee grounds are a by-product of the coffee brewing process. Currently, coffee grounds in the community are still untapped waste. Whereas spent coffee grounds has the potential to be converted into various high value bio-products that are environmentally friendly. This study aims to characterize coffee grounds waste which is popular in the community as a supporting material for renewable energy. This study uses a comparative method of 3 samples of Arabica coffee grounds (SCG-A), Robusta (SCG-R), and the Arabica-Robusta blend (SCG-AR) from coffee brands that are popular in Indonesian. Quantitative analysis was carried out by comparing the percentage of residual yield of the three samples. Qualitative characterization of coffee grounds was carried out using the FTIR 8300/8700 Spectrophotometer. The results of the three samples showed different rendemen values, namely 70% SCG-A, 60% SCG-R, and 80% SCG-AR. The FTIR test results showed that the three spent coffee grounds had the same functional group characteristics in the frequency range of 650–3900 cm-1. The detection of the hydroxyl functional group (-OH), the asymmetric strain of the CH bond of the methyl group (-CH3), and the stretching vibration of CO in the COH bond found in coffee grounds waste shows its potential as a supporting material for renewable energy if a further process is carried out in the form of pyrolysis/calcination at room temperature. 700◦C. Utilization of spent coffee grounds in the community can be done by establishing a Spent Coffee Grounds Bank (SCG Bank), educating the public so that they are willing to donate spent coffee grounds, and managing SCG as a supporting material for renewable energy.
The research Pengaruh Pupuk Organik Cair dari Kulit Kacang Tanah dan Kulit Pisang terhadap Pertumbuhan Vegetatif Bayam Rusdiyana Rusdiyana; Dyah Rini Indriyanti; Putut Marwoto; Retno Sri Iswari; Edy Cahyono
Jurnal Penelitian Pendidikan IPA Vol 8 No 2 (2022): April
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v8i2.1331

Abstract

The liquid organic fertilizer (LOF) formula from peanut and banana peels. This research aims to: (1). Analyze the effect of LOF provision from peanut and banana peels on the vegetative growth of spinach; (2). Analyze the best LOF dose for vegetative growth of spinach, and (3). Analyze the effect differences between NPK fertilizer and LOF from peanut and banana peels toward the vegetative growth of spinach. The researchers promoted this study from November to December 2020 in a greenhouse in Banjarbaru. The researchers applied RAL design by providing fertilizer since the spinaches were 10, 17, and 24 days. The vegetative growth parameters were: Plant height, number of leaves, leaf width, and the leave color. The result proved that: (1). LOF provisions from peanut and banana peels significantly influenced the height and leave numbers of spinach; (2). The best dose for LOF provision is 50ml of peanut peel LOF + 50ml of banana peel LOF to get excellent height and leave numbers of the spinach; (3). The growth of the spinach, in terms of height, numbers of leaves, and leaf width during NPK fertilizer provision, was in line with the provisions of banana and peanut peel LOF.
A Study of Sound Materials of Water Hyacinth (Eichhornia Crassipes) as Alternative STEAM Integrated Project-Based Learning Model (PjBL) M. Hidayatur Rohman; Putut Marwoto; Sigit Priatmoko
Jurnal Penelitian & Pengembangan Pendidikan Fisika Vol 8 No 1 (2022): JPPPF (Jurnal Penelitian dan Pengembangan Pendidikan Fisika), Volume 8 Issue 1, J
Publisher : Program Studi Pendidikan Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/1.08102

Abstract

This study aims to find an alternative sound-absorbing material from nature that is cheap and environmentally friendly, namely the water hyacinth plant (Eichhornia crassipes). The experimental soundproofing tool from a glass box with a placemat skat was developed by integrating science, technology, engineering, arts, and mathematics (STEAM) elements as an alternative project-based learning model (PjBL) for students. The research method used is experimental. Water hyacinth was sun-dried, woven in the form of a placemat with two variations of the test samples at several frequencies of 250 Hz, 500 Hz, 750 Hz, 1000 Hz, and 1500 Hz. Six stages of PjBL are used, and elements of STEAM are integrated. The results of the study obtained the value of Noise Reduction (NR) of sound for test samples 1, test sample 2, or a combination of test samples 1 and 2. Each test sample is effective at 1500 Hz high frequency; namely, test NR 1 = 8.7 dB, test NR 2 = 8.3 dB, and NR Gab=9.3 dB. The combined test sample was also effective at frequencies of 500 Hz and 750 Hz, with NR Gab=4.3 dB and NR Gab=4.7 dB. Following the theory that changes in sound between 3 to 12 dB have effects that humans can feel. This study concludes that natural water hyacinth fiber has fairly good quality as an alternative sound-dampening material. This experimental tool can also be an alternative to the STEAM-integrated PjBL learning model.
PROFIL KETERAMPILAN BERPIKIR KRITIS SISWA SMP DALAM PEMBELAJARAN IPA PADA MATERI TEKANAN ZAT Qurrota Ayun; Siti Hardiyanti Hasasiyah; Bambang Subali; Putut Marwoto
JPPS (Jurnal Penelitian Pendidikan Sains) Vol. 9 No. 2 (2020)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpps.v9n2.p1804-1811

Abstract

Keterampilan berpikir kritis adalah salah satu komponen kecakapan hidup yang merupakan paradigma pendidikan abad 21. Penelitian ini bertujuan untuk mendeskripsikan profil keterampilan berpikir  kritis siswa SMP pada materi Tekanan Zat. Desain penelitian ini yaitu penelitian deskriptif kuantitatif. Subjek penelitian diambil dengan metode cluster random sampling, yaitu sebanyak 23 siswa kelas VIII-B SMP Al Madina Semarang tahun ajaran 2018/2019. Instrumen yang digunakan dalam penelitian ini yaitu lembar soal yang berisi 10 pertanyaan tingkat tinggi (tingkat kognitif C4-C6) yang berupa pilihan ganda dengan lima aspek keterampilan berpikir kritis yang telah divalidasi oleh ahli. Hasil penelitian menunjukkan bahwa persentase keterampilan berpikir kritis siswa secara keseluruhan yaitu sangat tinggi 0%; tinggi 38%; sedang 45%, rendah 17%; dan sangat rendah 0%. Pada aspek memberikan penjelasan sederhana sebesar 74%, membangun keterampilan dasar 63%, menyimpulkan 37%, memberikan penjelasan lanjut 52%, serta mengatur strategi dan taktik 54%. Kesimpulan penelitian ini adalah profil keterampilan berpikir kritis siswa secara keseluruhan pada materi Tekanan Zat termasuk kategori sedang.
Profil Pemahaman Konsep Peserta Didik SMP Pada Materi Kalor dan Perpindahannya Bagus Addin Hutomo; Yuliana Suryaningsih; Bambang Subali; Putut Marwoto
JPPS (Jurnal Penelitian Pendidikan Sains) Vol. 9 No. 2 (2020)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpps.v9n2.p1777-1782

Abstract

The heat and displacement is one of the material in science learning taught at the junior high school level. This study aims to describe the profile of the conceptual understanding of Class VIII junior high school students on matter of heat and displacement. The design of this study is a descriptive study concerning the understanding of the concept of junior high school students in material heat and displacement with a quantitative approach. The subjects in this study were 27 students of class VIII D Kesatrian 1 Semarang junior high school. The sampling technique uses probability sampling techniques with simple random sampling technique. The data collection method used is a test instrument in the form of a two-level multiple choice question that has been validated by experts. The results of this study found that understanding the heat concept and its displacement of 7% in the criteria were very low, as much as 26% in the low category, 48% in the medium category, 15% in the high category, and by 1% the criteria were very high. Based on the results of the research, it can be concluded that the percentage of understanding of the concept of heat material and its displacement is the largest in the medium category.
Analisis Berpikir Kritis Peserta Didik pada Materi Gerak Benda dan Makhluk Hidup Sundari Sundari; Bambang Subali; Putut Marwoto
JPPS (Jurnal Penelitian Pendidikan Sains) Vol. 9 No. 2 (2020)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpps.v9n2.p1819-1824

Abstract

Penelitian ini bertujuan untuk mendeskripsikan : (1) tingkat berpikir kritis peserta didik, (2) Faktor-faktor yang mempengaruhi proses berpikir kritis peserta didik. Desain penelitian menggunakan penelitian deskriptif dengan pendekatan kuantitatif. Subyek penelitian ini adalah 30 peserta didik kelas VIII SMP Negeri 2 Selomerto Kabupaten Wonosobo. Subyek dipilih dengan menggunakan teknik probability sampling dengan teknik proportionale stratified random sampling. Teknik pengumpulan data menggunakan tes dan wawancara. Instrumen berupa soal pilihan ganda dan pedoman wawancara.  Hasil penelitian menunjukkan bahwa (1) tingkat berpikir kritis peserta didik SMP Negeri 2 Selomerto pada kategori sedang. Hal ini tampak dari indikator kemampuan memberikan penjelasan sederhana diperoleh 83%, kemampuan membangun keterampilan dasar sebesar 73%, kemampuan menyimpulkan sebesar 68%, kemampuan memberikan penjelasan lebih lanjut sebesar 47% dan kemampuan mengatur strategi sebesar 40%. (2) Faktor-faktor yang mempengaruhi proses berpikir kritis peserta didik meliputi (a) Peserta didik memiliki persepsi yang bias terhadap soal, (b) Peserta didik kurang menguasai konsep, (c) Peserta didik kurang teliti dalam menyelesaikan soal yang diberikan
Distribution of the Fraunhofer Diffraction Intensity by a Rectangular Slit Using a Razor Blade Eli Trisnowati; Putut Marwoto; Retno Sri Iswari; Edy Cahyono
Jurnal Penelitian Pendidikan IPA Vol 8 No 3 (2022): July
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v8i3.1284

Abstract

This research was conducted by making a rectangular slit using a razor blade as a narrow gap in the Fraunhofer diffraction experiment. The intensity distribution measurement on the resulting diffraction pattern uses a voltage divider circuit. This circuit takes advantage of the nature of the LDR, which changes resistance when exposed to light. Experiments show that a diffraction pattern screen when a 560 nm coherent light passes through a narrow rectangular slit made of razor cut. We measured the narrow gap using a tracker application with the resulting gap size (0.3564 x 0.4677) mm. The ratio of the intensity distribution of the x-axis bright pattern on the Fraunhofer diffraction by a rectangular slit with slit size height x width = (0.4677 x 0.3564) mm from b = -5p to 5p (maximum 4, maximum 3, maximum 2, maximum 1, central maximum, maximum 1, maximum 2, maximum 3, maximum 4) is 0.000873; 0.000763; 0.005395; 0.020583; 1; 0.039658; 0.008088; 0.002554; 0.001218. The ratio of the intensity distribution of the y-axis bright pattern on the Fraunhofer diffraction by a rectangular slit with slit size height x width = (0.4677 x 0.3564) mm from g = -5p  to 5p (maximum 4, maximum 3, maximum 2, maximum 1, central maximum, maximum 1, maximum 2, maximum 3, maximum 4) is 0.001890; 0.001469; 0.002447; 0.040516; 1; 0.037141; 0.006482; 0.001690; 0.000440. This study indicates that diffraction experiments and the measurement of the diffraction pattern’s intensity can be carried out with simple materials and equipment and can be used in the correct experiment.
P PENGAMATAN KONVEKSI RAYLEIGH BENARD SEBAGAI REPRESENTASI PEMBELAJARAN FENOMENA ALAM MELALUI GERAK MOLEKUL AIR M Hidayatur Rohman; Putut Marwoto; Retno Sri Iswari; Edy Cahyono
Jurnal Penelitian Pendidikan IPA Vol 8 No 3 (2022): July
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v8i3.1323

Abstract

Research has been carried out with a device to observe the phenomenon of Rayleigh Benard convection, made of a glass box bounded by a lower plate and an upper plate. The bottom plate is hotter than the top plate which functions to heat the horizontal fluid layer from below. This study aims to observe the phenomenon of water molecule movement. The observation medium was water mixed with teak sawdust as a representation of water particles with an average density of mean=0.99 g/cm3. The variation of water thickness (d) used 5 cm and 6 cm with variations in temperature difference (DT) with an average increase of 50°C. Data was collected with a cellphone camera and run with Windows Movie Maker software which has a time accuracy of up to 0.001 seconds. It was observed that an increase in the temperature difference (DT) between the two plates resulted in an increase in the velocity of motion of water particles in convection which is depicted by a v-DT diagram. Due to the difference in temperature (DT) also results in the movement patterns of water molecules, namely laminar and turbulent. The turbulent phase with the Rayleigh number value R~107, indicated that the flow of water particles is getting faster, the direction of the flow of the particles starts to become irregular and sometimes signs of a water vortex appear. At different fluid immersion results in the start of a turbulent phase. The turbulent phase for d=5cm is observed at DT~30°C, and d=6cm at DT~20°C. Furthermore, this RBC phenomenon is used as a representation of learning natural phenomena in air fluids, namely whirlwinds as an event due to differences in temperature and pressure of a fluid
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 Bakar, Suryani Abu 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 Darsono, Teguh 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 DWI YULIANTI 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 Fajar Shafira Faiz Mudhofir Fania Fitriana Rosita Farid Ahmadi Fatiatun, Fatiatun Fauzi Ahmad Muda 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 Julien Chintya Kartono , Kasmadi Imam Supardi Khairiah, Khairiah Kristin Oktaviani Kurnia, Wanda Hesti Kurniawan, Aziz Kusnanto Mukti Wibowo Lanidana Etni Laos Lewa, Ismira Wahyu Lestari Lia Afriyanti Nasution Lilis Lismaya Litasari Aldila Aribowo Livia Eunike Paut 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 Media Sasmita Minhat, Minhat Mohamad Ayubi, Dimas Mufida, Aina Muhamad Kurnia Sugandi Muhammad Dzaki Fuad Salim Putra Muhammad Habib Ramadhani Mujib Ubaidillah Muqoyyanah Muqoyyanah, Muqoyyanah Mursidi, Andi Mushthofa, Zayyinul Muslimah Susilayati Mutiarani, Azizah Muttaqin, Rodhotul Muttaqin, Rudhotul Nada, Nadila Qotrun Nafiusokhib, Nafiusokhib Naila Nur Niswatul Ula Nathan Hindarto Ngurah Made Dharma Putra Noor, Yusmaniar Afifah Novita, Mery Noviyatun, Siti Nugroho, Deni Ebit Nur Hamid NUR HAMID Nuri Nuri Nuri Nuri Nursidhi, Nursidhi Nyi Mas Ayu Ratna Gumilar Obimita Ika Permatasari Panca Dewi Purwanti Panca Dewi Purwati, Panca Pratiwi Dwijananti Pratiwi Oktaviani, Pratiwi Prayitno, Mohammad Agus 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 riswanto riswanto Rita Destini Rita Iva Fatmala Riyanti Riyanti Rofi'ah, Siti Hidayatur Rofiatul Zannah Rofiatul Zannah, Rofiatul Rosmeita Ayu Budiarti Ruhama Desy, Ruhama Rusdiyana Rusdiyana Ruwiyatun Ruwiyatun S Sulhadi Sarwi - Sarwi Sarwi Sarwi Sarwi Sarwi Sarwi Sarwi Sarwi Sarwi Sarwi Sarwi Sarwi 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 Muhtoharoh Siti Noviyatun 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 Sugianto - Sugianto Sugianto Sugianto Sugianto Sugito Sugito Sugiyanto - Suharto Linuwih Suherman Suherman Suherman Suherman Sujarwata Sujarwata, Sujarwata Sulhadi Sulhadi - Sulhadi Sulhadi Sulistiyo Rini, Ari Sumarli Sumarli, Sumarli Sundari Sundari Sundari Sundari Sungkowo Edy Mulyono Sunyoto Eko Nugroho, Sunyoto Eko Supriadi Rustad Supriyadi Supriyadi Supriyadi Supriyadi 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 Yuenyong, Chokchai Yuliana Suryaningsih Yuni Arfiani Yuniar Fahmi Lathif Zaenuri Mastur Zahrotul Aini, Zahrotul Zayyinul Mushthofa Zhafirah, Azizah