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Suwandi, Tri
Universitas Pendidikan Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Education Engineering Environmental Science Immunology & microbiology Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Public Health Social Sciences Veterinary Other

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Retrieval Practice: Strategy for Reducing Cognitive Anxiety through Students' Concept Mastery and Cognitive Ability Damayanti, Anggia Fitri; Rahmat, Adi; Suwandi, Tri
Jurnal Inovasi Pendidikan IPA Vol. 10 No. 2: Oktober 2024
Publisher : Faculty of Mathematics and Natural Sciences, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jipi.v10i2.71416

Abstract

Retrieval practice is a well-known additional learning strategy after class to maintain long-term memory. This study investigates its effect on students' concept mastery, cognitive ability, and cognitive anxiety in learning about the immune system. Using purposive sampling, 128 eleventh-grade students from a public school in Bandung were divided into two groups: 67 in the experimental group and 61 in the control group. In both groups, immune system learning was given three times over three weeks, and retrieval practice was given three days after classroom learning through Google Forms. Concept mastery and cognitive ability were assessed with a 30-item multiple-choice test, while cognitive anxiety was measured with a 27-item questionnaire with nine scales. To see the effect of retrieval practice and the relationship between the data, they were analyzed using T-test or Mann-Whitney and Spearman's rank. The results showed that retrieval practice significantly improved concept mastery and cognitive ability, and reduced students' cognitive anxiety. However, there was no correlation between concept mastery and cognitive anxiety. These results suggest that cognitive anxiety is not related to concept mastery. Cognitive anxiety is more directly affected by retrieval practice.
PENGARUH PEMBERIAN PUPUK ORGANIK CAIR KULIT PISANG TANDUK (Musa paradisiaca) DAN DAUN Moringa oleifera TERHADAP PERTUMBUHAN TANAMAN KANGKUNG DARAT (Ipomoea reptans POIR.) DENGAN MENGGUNAKAN MEDIA KULTUR AIR Hayati, Annida Putri; Maharani, Dhea Tinde Fitriana; Rahmawati, Fitriana; Fauziah, Karyna; Helmi, Haidar; Zanah, Nurul Fatihal; Khairunnisa, Zahra Syafira; Rahman, Taufik; Suwandi, Tri
Bioscience Vol 8, No 2 (2024): Biology
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/0202371121503-0-00

Abstract

Kangkung darat (Ipomoea reptans Poir) adalah salah satu jenis kangkung yang mudah dibudidayakan meskipun begitu, di kota besar sulit menanam kangkung karena keterbatasan lahan. Digunakanlah metode kultur air dalam budidayanya. Penelitian ini bertujuan untuk mengetahui pengaruh pupuk organik cair (POC) berbahan dasar kulit pisang (Musa paradisiaca) dan daun kelor (Moringa oleifera) terhadap pertumbuhan kangkung darat dengan menggunakan metode kultur air.  Penelitian dilakukan selama 14 hari, di laboratorium Fisiologi FPMIPA Universitas Pendidikan Indonesia. Penelitian ini menggunakan metode Rancang Acak Lengkap (RAL) dengan 3 kali pengulangan dari setiap perlakuan. Parameter penelitian ini yaitu jumlah daun, tinggi cabang, panjang akar, jumlah cabang, berat basah batang dan berat basah akar. Data dianalisis dengan menggunakan uji Anova pada taraf 95%. Dari hasil penelitian diketahui bahwa pupuk POC tidak memiliki pengaruh nyata terhadap jumlah daun, tinggi cabang, panjang akar, jumlah cabang, berat basah batang dan berat basah akar. Tetapi pengaruh dapat dilihat apabila dibandingkan dengan kontrol.Kata kunci: Kangkung darat, Kultur air, Musa paradisiaca,  Moringa oleifera
Identifikasi Adaptasi Kamuflase Hewan pada Tiga Jenis Batang Pohon di Taman Hutan Raya Ir. Djuanda, Bandung, Jawa Barat Apriliani, Nurul Ilma; Sakinah, Rinrin; Nururrahmani, Azmah; Alfaris, Razib Ikbal; Saefudin, Saefudin; Suwandi, Tri
Bioma : Berkala Ilmiah Biologi Vol. 26 No 2, Tahun 2024
Publisher : Departemen Biologi, Fakultas Sains dan Matematika, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/bioma.2024.55842

Abstract

Kamuflase merupakan salah satu bentuk adaptasi morfologis makhluk hidup agar tidak dapat dikenali oleh pemangsa dengan mengatur warna tubuhnya sesuai dengan latar belakang objek di lingkungannya. Keragaman hewan yang memiliki kemampuan kamuflase salah satunya dapat diamati pada batang pohon. Jenis pohon dengan warna dan struktur berbeda dapat menjadi tempat hidup bagi spesies dan tingkat kamuflase yang berbeda pula. Salah satu tempat dengan keragaman flora dan fauna yang tinggi dan masih terlindungi adalah di Taman Hutan Raya Ir. Djuanda. Tujuan penelitian ini adalah untuk mengetahui bentuk adaptasi kamuflase dan kesesuaian morfologi hewan yang hidup pada dua jenis batang pohon yaitu Pterygota horsfieldii dan Khaya anthotheca pada tiga plot berbeda di Taman Hutan Raya Ir. Djuanda, Bandung. Data diambil dengan metode VES (Visual Encounter Survey) dengan mengambil gambar menggunakan kamera HP Xiaomi Redmi Note 10s. Hasil dokumentasi yang diperoleh kemudian dianalisis rata-rata nilai RGB (Red, Green, Blue) menggunakan perangkat lunak ImageJ untuk mengetahui nilai Euclidean Distance. Hasil penelitian menunjukkan terdapat beberapa famili hewan yang diidentifikasi dengan nilai rata-rata RGB yang paling mendekati rata-rata RGB pohon pada plot 1, 2, dan 3 secara berturut-turut adalah famili Gryllidae, Araneidae, dan Formicidae. Selain itu, nilai Euclidean Distance terkecil ada pada plot 3 yang menunjukkan tingkat kamuflase hewan yang paling baik. Dengan demikian, dapat disimpulkan bahwa perbandingan nilai rata-rata RGB hewan dan rata-rata RGB pohon tidak berbeda jauh pada ketiga plot. Hal itu menunjukkan bahwa seluruh hewan pada ketiga plot memiliki kemampuan kamuflase yang baik. 
The Effect of Citronella Oil and Sesame Oil Emulsion Coating on The Quality and Storability of Mangoes (Mangifera Indica L.) Taufik Rahman; Tri Suwandi; Rena Adelia Suryani; Anisa Maharani; Chairani Azahra; Gunawan; Lu’lu’ Lathifatuzzakiyyah; N Sarah Sri Wahyuni; Nurul Annisa
Bionature Vol. 24 No. 1 (2023): April 2023
Publisher : Jurusan Biologi Universitas Negeri Makassar

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Abstract

One of the most promising agricultural commodities is the cultivation of mangoes. One way that can be used tomaintain the quality and freshness of the fruit in a simple way is to do an emulsion coating. The purpose of thisresearch was to determine the effect of citronella oil and sesame oil emulsion coating on the quality and storabilityof mango (Mangifera indica L.). The method used in this study was a Completely Randomized Design (CRD)with two factorial treatments and controls. The first factor was citronella oil under a concentration of 0.5% and1%. The second factor is sesame oil under a concentration of 0.5% and 1%. The two oils were combined in theemulsion into three treatment combinations, namely S0W2, S2W0, and S1W1. The parameters measured in theobservations were hardness, damage, and glucose levels in the fruit. The results showed that the level of hardnessof mangoes decreased in the four treatments. Then it was found that there was an effect of delaying the maturityof the fruit with the S1W1 treatment because it was not damaged like the other treatments. While glucose levelsin the fruit have increased due to the ripening process. Coating treatment with a ratio of citronella oil concentrationof 0.5% to 0.5% sesame oil is the most effective treatment combination in maintaining quality and shelf lifebecause this treatment can delay damage to mangoes.
Pengaruh Lama Penyimpanan terhadap Daya Perkecambahan Biji Labu Kuning (Cucurbita moschata): The Effect of Seed Storage Duration on Seed Germination of Yellow Pumpkin (Cucurbita moschata) Suwandi, Tri; Rahman, Taufik; Maharani, Ega Adinda Putri; Solihat, Ihat; Fauziah, Karlita Vaulin; Stelladarifa, Laurent Elizabeth; Nurlaila, Mila; Febriyani, Wulida Khomsah
Biospecies Vol. 16 No. 1 (2023): Januari 2023
Publisher : Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/biospecies.v16i1.23477

Abstract

Yellow pumpkin (Cucurbita moschata) is an agricultural product that is rich in beta carotene or provitamin A, so it is very good for health. This study aims to determine the effect of storage duration on the germination of yellow pumpkin seeds and was carried out in Bandung from 24 November to 15 December 2022. The experiment was carried out by treating S0=seeds not stored, S1=seeds stored for 1 day, S2 = seeds stored for 3 days, S3 = seeds stored for 5 days, and S4 = seeds stored for 7 days. Each treatment was repeated 3 times with a total of 10 seeds in each repetition. Seeds are planted in soil media as deep as 0.5 cm in a clear plastic container without being covered. What was observed was the germination percentage in each experiment. The results obtained from the experiment showed that seed germination duration had an effect on the germination percentage of yellow pumpkins. The highest percentage of seed germination was achieved in the 5-day storage treatment. Keywords: Cucurbita moschata, yellow pumpkin, germination, storage   Abstrak Labu kuning (Cucurbita moschata) merupakan salah satu hasil pertanian yang kaya akan beta karoten atau provitamin A sehingga sangat baik untuk kesehatan. Penelitian ini memiliki tujuan untuk mengetahui pengaruh lama penyimpanan terhadap daya perkecambahan biji labu kuning dan telah dilakukan di Bandung mulai tanggal 24 November hingga 15 Desember 2022. Percobaan dilakukan dengan memberikan perlakuan pada S0=biji tidak disimpan, S1= biji disimpan selama 1 hari, S2= biji disimpan selama 3 hari, S3=biji disimpan selama 5 hari, dan S4=biji disimpan selama 7 hari. Masing-masing perlakuan dilakukan ulangan sebanyak tiga kali dengan jumlah 10 biji pada setiap pengulangan. Biji ditanam pada media tanah sedalam 0,5 cm yang berada di dalam wadah plastik bening tanpa ditutup. Hal yang diamati adalah persentase daya perkecambahan pada setiap percobaan. Hasil yang didapat dari percobaan menunjukkan bahwa lama penyimpanan biji berpengaruh terhadap daya perkecambahan labu kuning. Persentase daya perkecambahan biji tertinggi dicapai pada perlakuan penyimpanan biji selama 5 hari. Kata kunci: Cucurbita moschata, labu kuning, perkecambahan, penyimpanan.
PENGARUH PEMBELAJARAN BERBASIS MASALAH OPEN-ENDED TERHADAP PENINGKATAN KEMAMPUAN PEMECAHAN MASALAH OLEH SISWA Suwandi, Tri; Hasnunidah, Neni; Marpaung, Rini Rita T.
Jurnal Pendidikan Progresif Vol 6, No 2 (2016): Jurnal Pendidikan Progresif
Publisher : FKIP Universitas Lampung

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Abstract

: The Effects of Problem Based Learning Open-Ended Type towards The Improving of Students’ Problem Solving Skills. This study aimed to determine the effect of using openended PBM models in improving problem-solving skills of students. This study was a quasiexperimental with pretest posttest designs not equivalent. Samples were students in class X1 and X6 selected from the population by using cluster random sampling. This research data were in the form of quantitative and qualitative data. The quantitative data were obtained from the average value of pretest and posttest that were statistically analyzed using t-test at 5% confidence level through SPSS 17. Qualitative data were in the form of a description of the problem solving ability of students, student learning activity data, and the questionnaire responses of students to use open-ended PBM model which were analyzed descriptively. The average percentage of students’ activity in all aspects observed in the experimental class is higher than the control class (experimental = 81.32; control = 64.22). Therefore, learning by using PBM model of open-ended can influence the increasing of problem solving skills by students.  Keywords: problem-based learning model open-ended type, problem-solving skills, biology learning, biodiversity. DOI: http://dx.doi.org/10.23960/jpp.v6.i2.201601
Junior High School Students’ Understanding of The Nature of Science Habiby, Iqbal; Hernani, Hernani; Suwandi, Tri
Jurnal Pendidikan Progresif Vol 10, No 2 (2020): Jurnal Pendidikan Progresif
Publisher : FKIP Universitas Lampung

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Abstract

Junior high school students’ understanding of the nature of science. Objective: The purpose of this research is to explore the junior high school students’ understanding of nature of science (NOS). Methods: The survey in this research was conducted in 8th grade as many as 80 students from three schools in East Prabumulih Sub-District, South Sumatera Province, Indonesia, which was determined by stratified random sampling technique. Students’ understanding of 7 aspects of NOS was measured using a questionnaire containing 35 items consisting of 4 Likert scale statements (scale 1-5) and 1 question open-ended responses to each aspect of NOS. Findings: The results showed that students’ understanding of NOS is still inadequate. The students’ understanding of NOS that inadequate shown through by the small percentage of the informed view category on all aspects of the NOS measured, both Likert scale items and open-ended responses. Conclusion: These findings emphasize the need for learning to improve understanding of NOS for students.Keywords: nature of science, survey method, students understanding.DOI: 10.23960/jpp.v10.i2.202001
The Effect of Differences in Light Color Filters on Potato (Solanum tuberosum) Shoot Growth Fitriani, Salma; Khairunnisa, Nabila; Lafairuz, Nisrina Najla; Putri, Savitri Novantira; Syahrani, Najwa; Setiawan, Gilang; Fitriana, Devita; Rahman, Taufik; Suwandi, Tri
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Publisher : Universitas Pendidikan Indonesia and Konsorsium Biologi Indonesia

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Abstract

Potato (Solanum tuberosum) is a plant that plays an important role as a source of food and carbohydrates for the world community after maize, wheat, and rice. The lack of sufficient demand for low yields in Indonesia can be caused by many factors, one of which is environmental factors, which greatly affect the process of growing potatoes. They are temperature, duration of irradiation, light intensity, growing media, and humidity. Because the growth and process of photosynthesis in plants can be affected by the light factor, therefore our aim in conducting this research was to determine the effect of different light color filters on potato mass, number of shoots, shoot length, number of roots, and root length. The research method used was a completely randomized design (CRD) using 4 (four) treatments. The treatment that was given was P1 on potato shoots which were given a clear plastic filter cover (control), P2 with a blue plastic filter cover, P3 with a plastic filter cover, and P4 which was green. Each treatment was repeated three times for 2 weeks with observations every 2 days. The parameters observed were potato mass, number of shoots, shoot length, number of roots, and root length. The data is then analyzed descriptively using the average and standard deviation. There are differences in the average mass of potatoes, number of shoots, shoot length, number of roots, and root length given different light color filter treatments. The color filter treatment that gives the best results for all parameters is the blue filter.
The Effect of Applying Eggshell-Based Liquid Fertilizer on The Growth of Leek Plants (Allium fistulosum L.) Sulistiyanti, Eva; Mumtaz, Hana; Ilham, Muhammad Nur; Farid, Mumtazah Imtiyaz; Azzahra, Putri Nazma; Qudsi, Qisthina Hunafa; Yulianty, Nurfitri; Suwandi, Tri
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Publisher : Universitas Pendidikan Indonesia and Konsorsium Biologi Indonesia

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Abstract

Eggshell-based liquid organic fertilizer (LOF) is a sustainable nutrient source rich in nitrogen (N), phosphorus (P), and potassium (K), essential for plant growth. This study investigated the effects of eggshell LOF on the growth of leek plants (Allium fistulosum L.) using a Completely Randomized Design (CRD) with five concentration treatments: 0% (P0, control), 5% (P1), 10% (P2), 15% (P3), and 20% (P4), each replicated three times. The experiment was conducted in Kel. Isola, Kec. Sukasari, Bandung City, Indonesia, during December 2022. Plant height was measured every three days for two weeks as the primary growth parameter. Results demonstrated significant differences (*p* 0.05) among treatments, with the 20% LOF concentration (P4) yielding the highest average plant height (22.7 cm). In contrast, the 5% LOF group (P1) showed no growth, indicating plant mortality. A positive correlation was observed between LOF concentration and plant height, confirming that higher nutrient availability directly enhances leek growth. These findings highlight the efficacy of eggshell LOF, particularly at 20% concentration, as a viable organic fertilizer for improving Allium fistulosum productivity. Further research is recommended to explore optimal concentrations beyond 20% and assess long-term soil health impacts.
The Diversity of Macrozoobenthos as a Bioindicator of Water Quality in the Upper Cikapundung River Kimku, Ancelina; Surtikanti, Hertien Koosbandiah; Suwandi, Tri
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Publisher : Universitas Pendidikan Indonesia and Konsorsium Biologi Indonesia

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Abstract

Macrozoobenthos are aquatic organisms that live on the bottom of the water. Currently, the upstream Cikapundung River is indicated to be polluted by garbage, household waste, industrial waste, agricultural waste and livestock manure. This study aims to determine the diversity of macrozoobenthos as a bioindicator of water quality in the upstream Cikapundung river based on physical, chemical and biological parameters. This research was conducted in April 2023. The research used the exploration method. Macrozoobenthos sampling consists of five locations namely; Curug Omas, Curug Lalay, Kidang, Curug Koleang and Curug Dago. The results of the data analysis of the calculation of the Diversity Index, Abundance and Dominance indicate that the upstream Cikapundung river is classified as moderately polluted. This is evidenced by the diversity value obtained, which falls within the range of 1.94 - 2 (2.0). The high abundance index value is observed in location 2, while the dominance index value is 0.50 D ≤ 0.75. A total of nine species were identified in the benthic samples, which were classified into four classes, nine families, and seven genera. The dominating benthos of the five locations is Planaria sp. Based on an analysis of biotic and abiotic components, the upstream Cikapundung river is classified as exhibiting minimal pollution.
Co-Authors Adi Rahmat Adi Rahmat Adika Muhammad Aziz Adila Hafidzani Nur Fitria Agung Purwanto Ahmad Ali Al Fathin, Deva Shofa Alfaris, Razib Ikbal Ana Ratna Wulan Ane Rizka Fauziyah Anisa Maharani Apriliani, Nurul Ilma Ardhiana Resti Kamila Aulia Eka Wulandari Azzahra Nabila Dwi Khairunnisa Azzahra, Putri Nazma Chairani Azahra Conyta, Elvira Damayanti, Anggia Fitri Dea Fitri Afifah Dewi Wansantika Gunawan Diana Vivanti Sigit Dina Maulina Dinda Widyani Elis Kurniani Farah Muthi Hermawati Farid, Mumtazah Imtiyaz Fauziah, Karlita Vaulin Fauziah, Karyna Febriyani, Wulida Khomsah Fernanda, Jeannifer Deni Fitriana Rahmawati Fitriana, Devita Fitriani, Salma Ghifari, Rizal Haidar Gunawan Gunawan Gunawan Habiby, Iqbal Hayati, Annida Putri Helmi, Haidar Henita Rahmayanti HERNANI - Hidayah, Fachri Hilma Aulia Ihsani, Dini Naila Ilham, Muhammad Nur Ilmi Zajuli Ichsan Isnaturrokhmi, Iftirasy Jihan Nurhalimah Salsabila Kelvin Pramudya Anantatur Khairunnisa, Nabila Khairunnisa, Zahra Syafira Kimku, Ancelina Lafairuz, Nisrina Najla Lisdiana, Kania Lu'lu' Lathifatuzzakiyyah Lu’lu’ Lathifatuzzakiyyah Maharani, Dhea Tinde Fitriana Maharani, Ega Adinda Putri Median Agus Priadi Meli Driyani Muhammad Aziz Muhammad Aziz Muhammad Naufal Daffa Muhammad Wafda Jamil Mumtaz, Hana Muslihah, Fitriyyatul Mutiara Amelia Sabrina Mutiara Zahira Ramadhani N Sarah Sri Wahyuni Nabila Tazkiyyatul Afifah Nadhira Nur Hukma Narti Nurhatifah Neng Iis Nur Istiqomah Neni Hasnunidah Nur Fadli Hazhar Fachrial Nuraida, Indri Nurapriliansyah, Helmi Nurlaila, Mila Nurul Annisa Nurul Melani Nururrahmani, Azmah Oryza Aprilia Devina Puput Yuliasari Putra, Alfito Rizki Jeremia Syah Putri, Savitri Novantira Qudsi, Qisthina Hunafa Rahmah Nurul Aina Hasanah Rena Adelia Suryani Rini Rita T. Marpaung Rizky, Adhinda Septhia Nur Rudhya Nurul Ilma S., Nadia Difa’i Mutmainah Saefudin Saefudin Sakinah, Rinrin Sekar Madu Kusumawardani Setiawan, Gilang Shadrina, Syifa Nur Siti Nur Shifa Sholihat Siti Nurkhalishah Sofi Arofah Solihat, Ihat Stelladarifa, Laurent Elizabeth Sulistiyanti, Eva Sulistyowati, Euis Trisni Surtikanti Hertien Koosbandiah, Surtikanti Suti Supadmi Syafira Aulia Putri Syahrani, Najwa Syifa Marwah Taufik Rahman Taufik Rahman Taufik Rahman Tina Safaria Nilawati Titin . Vania, V. Veithzal Rivai Zainal Winda, Ratu Yuandhana, Genta Yulianty, Nurfitri Zanah, Nurul Fatihal