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INDONESIA
Jurnal Sains dan Teknologi
Published by Universitas Pendidikan Ganesha
ISSN : 23033142     EISSN : 25488570     DOI : -
Core Subject : Science, Education,
Computer Science & IT Education
Jurnal Sains dan Teknologi(JST) is a journal aims to be a peer-reviewed platform and an authoritative source of information. We publish original research papers, review articles and case studies focused on Mathematic, Biology, Physic, Chemistry, Informatic, Electronic and Machine as well as related topics. All papers are peer-reviewed by at least two referees. JST is managed to be issued twice in every volume.
Arjuna Subject : -
Articles 648 Documents
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Penambahan Compatibilizer pada Polymer Blend dari Limbah Masker Sekali Pakai dan Polypropylene Daur Ulang terhadap Sifat Mekanik Material Ibrahim, Anwar; Widiastuti, Indah; Estriyanto, Yuyun
JST (Jurnal Sains dan Teknologi) Vol. 13 No. 3 (2024): Oktober
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jstundiksha.v13i3.84945

Abstract

Pandemi COVID-19 meningkatkan limbah masker sekali pakai secara signifikan, menghasilkan mikroplastik yang sulit terurai dan berbahaya bagi lingkungan. Masalah ini mendorong penelitian untuk mengembangkan solusi berbasis daur ulang menggunakan polymer blend dengan penambahan compatibilizer untuk meningkatkan sifat mekanis. Penelitian ini bertujuan menganalisis efek compatibilizer Maleic Anhydride Grafted Polypropylene (MAPP) pada polymer blend berbahan polypropylene limbah masker sekali pakai. Penelitian ini merupakan eksperimen dengan desain kuantitatif. Subjek penelitian terdiri dari spesimen polymer blend dengan variasi komposisi limbah masker (70-100%), polypropylene daur ulang (30%), dan compatibilizer MAPP (0-3%). Sebanyak 5 spesimen diuji untuk masing-masing variasi menggunakan standar ASTM D638 untuk uji tarik dan ASTM D256 untuk uji impak. Data dikumpulkan melalui pengujian mekanik dan dianalisis menggunakan statistik deskriptif dan inferensial. Hasil penelitian menunjukkan bahwa penambahan compatibilizer meningkatkan sifat tarik dan impak polymer blend secara signifikan dibandingkan dengan campuran tanpa compatibilizer. Simpulan penelitian ini menunjukkan bahwa polymer blend berbasis limbah masker dengan compatibilizer MAPP dapat menjadi alternatif material ramah lingkungan dengan sifat mekanik yang lebih baik, berpotensi sebagai produk hijau bernilai komersial. Implikasinya, metode ini mendukung pengelolaan limbah plastik berkelanjutan dan ekonomi sirkular.
The Effect of Drying Time on the Physicochemical Characteristics of Beetroot (Beta Vulgaris L.) Sheet Jam Dwi Siska Amanda; Rahmadhia, Safinta Nurindra
JST (Jurnal Sains dan Teknologi) Vol. 13 No. 3 (2024): Oktober
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jstundiksha.v13i3.85165

Abstract

The sheet jam from beetroot is a modification of spreadable jam and a diversification of food based on beetroot. Drying is one of the factors that determines the characteristics of the sheet jam. The objective of this study is to determine the effect of drying duration on the physicochemical characteristics of beetroot sheet jam. The drying process was conducted at a temperature of 50 °C with varying drying times of 10, 12, and 14 hours. The analyses performed in this study included texture tests (Hardness, Cohesiveness, Adhesiveness, Gumminess, and Chewiness), pH, moisture content, and antioxidant activity, with three repetitions for each test. The results showed that for the texture parameter, Hardness ranged from 12.66 to 17.65 N, Cohesiveness from 291.76 to 581.04 N, Adhesiveness from 7.35 to 33.58 Nmm, Gumminess from 5198.15 to 7973.70 N, Chewiness from 5117.80 to 7151.6 N, pH ranged from 3.93 to 5, moisture content from 18.85% to 24.95%, and antioxidant activity (IC50) ranged from 38.81 to 47.82 ppm. The conclusion of this study is that drying significantly affects the physicochemical characteristics of beetroot sheet jam.
Pendekatan Polifasik Pada Eksplorasi Bakteri Asam Laktat dari Tempoyak di Sumatera Selatan Soleha, Siti; Atina Qurba Hanifa
JST (Jurnal Sains dan Teknologi) Vol. 13 No. 3 (2024): Oktober
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jstundiksha.v13i3.85208

Abstract

The polyphasic approach is a comprehensive method for classifying bacterial isolates into specific. It combines morphological  and biochemical data with molecular details, such as 16S rRNA gene sequencing. This study aims to identify LAB (Lactic Acid Bacteria) species found in tempoyak from South Sumatra. The identification process includes examining colony morphology, cell morphology, physiology biochemistry, and analyzing the 16S rRNA gene of LAB. The physiological and biochemical characteristics of LAB were observed through test such as oxygen requirement, motility, indole, catalase, MR-VP, citrate, urea, and sugar fermentation. The Morphological, biochemical and physiological characteristics were compared to those in Bergey's Manual of Determinative Bacteriology. The 16S rRNA gene was amplified using universal primers 27F (5' AGA GTT TGA TCM TGG CTC AG 3') and 1492R (5' TAC GGY TAC CTT GTT ACG ACT T 3'). DNA sequences in FASTA format were compared to NCBI DNA database using BLAST software. A Phylogenetic tree was reconstructed using the Maximum likelihood method in MEGA X with a bootstrap of 1000. This study successfully isolated three LAB, coded as TP02, TP07 and TP08. TP02 was identified as Lactobacillus sp, YIT 11469, TP07 as Lentilactobacilus kefiri strain NBRC 15888 and TP08 as Lentilactobacillus buchneri strain JCM 1115. TP02 and TP08 showed strain level similarity with identity percentages of 99.93% and 99.60%, respectively.
Infestasi Pinjal, Kutu dan caplak Ektoparasit pada Kucing Kampung (Felis catus Linnaeus, 1758) di Kecamatan Saketi, Kabupaten Pandeglang, Banten N.A. Abdilah; M. F. Girinurani; U. Setiawan; H. Susilo
JST (Jurnal Sains dan Teknologi) Vol. 13 No. 3 (2024): Oktober
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jstundiksha.v13i3.85307

Abstract

Ektoparasit yang menginfestasi kucing kampung (Felis catus Linn.) menimbulkan gangguan kesehatan pada kucing bahkan berperan sebagai penyebab langsung maupun vektor zoonosis. Tujuan penelitian ini menganalisis jenis, intensitas serangan dan prevalensi pinjal, kutu dan caplak ektoparasit pada F. catus. Penelitian menggunakan pendekatan deskriptif-kuantitatif. Parameter yang diteliti mencakup jenis-jenis, intensitas serangan dan prevalensi pinjal, kutu dan caplak parasit yang menginfestasi F. catus.  Populasi F. catus mencakup semua kucing kampung. Sortasi, koleksi slide preparat, identifikasi hingga menentukan nilai dan kategori intensitas serangan dan prevalensi terhadap 560 ektoparasit yang diambil secara purposive sampling dari 28 individu F. catus pada 14 desa. Hasil penelitian ditemukan 3 jenis ektoparasit meliputi Felicola subrostratus (kutu), Ctenocephalides felis (pinjal) dan Ixodes ricinus (caplak). Pinjal C. felis memiliki intensitas serangan dan prevalensi paling tinggi secara berurutan 17,1 individu/hospes dan 100 %. Infestasi C. felis berpotensi menimbulkan zoonosis. Prevalensi ketiga jenis ektoparasit memiliki kategori yang berbeda pada jantan dan betina F. catus mencakup sering, umumnya, sedang, biasa dan selalu. Penelitian lebih lanjut diperlukan pada populasi F. catus yang lebih besar dengan memperhatikan faktor pemeliharaan hospes dan kasus kejadian zoonosis.
Analysis of Responses to the Development of E-Modules to Improve Students' Critical Thinking Skills in Reaction Rate Materials in the Form of Android Applications Sanova, Aulia; Kurniawan, Dwi Agus; Husna, Sri Muslimatul; Triani, Elza
JST (Jurnal Sains dan Teknologi) Vol. 13 No. 3 (2024): Oktober
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jstundiksha.v13i3.85758

Abstract

Students' critical thinking skills in chemistry learning are generally still low, so interesting open materials are needed to improve students' critical thinking skills, one of which is e-modules. This study aims to determine the feasibility of e-modules and to determine the responses of educators and students to android-based e-modules in improving students' critical thinking skills at the rate of material reaction. This study uses a research and development (R&D) model with an R&D-based research design which stands for the ADDIE model (Analysis, Design, Development, Implementation, Evaluation). Data collection techniques through validation by material and media experts, as well as responses from teachers and students. The subjects of the study consisted of 30 students who used e-modules in learning. The data analysis technique used the t-test (Independent Sample T Test) to measure differences in students' critical thinking skills before and after using e-modules. The results showed a significant increase in students' critical thinking skills, with an average posttest score increasing by 13.3 points compared to the pretest (p <0.05). The conclusion of this study is that Android-based e-modules are effective in improving students' critical thinking skills. The implication of this research is that e-modules can be an interesting learning medium and can be used to support learning at school or independently at home, and have the potential to improve students' learning outcomes and critical thinking skills in the long term.
Pemberi Pakan Ikan Otomatis berbasis IoT dengan FLC Berdasarkan Kualitas Air (Suhu, PH, Kekeruhan) Indrawati, Elsanda Merita; Suprianto, Bambang; Kartika, Unit Three
JST (Jurnal Sains dan Teknologi) Vol. 13 No. 3 (2024): Oktober
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jstundiksha.v13i3.85982

Abstract

Pemberian pakan ikan secara konsisten dengan jumlah yang sama tanpa melihat kondisi lingkungan dan kebutuhan ikan dapat menyebabkan pakan tidak termakan, mengendap didasar kolam dan meracuni ikan. Tujuan pada penelitian ini yaitu menciptakan alat pemberi pakan ikan otomatis berbasis IoT dengan Fuzzy Logic Controller yang akurat dalam menentukan jumlah pakan berdasarkan kualitas air kolam. Jenis penelitian ini yaitu Research and Deveopment (RnD). Pada penelitian ini parameter inputan yaitu berupa suhu, ph, tingkat kejernihan dan outputan yaitu berupa banyaknya putaran motor yang dapat menentukan jumlah pakan sehingga menghasilkan 27 aturan fuzzy. Metode pengumpulan data yaitu berupa wawancara dan observasi kepada petani ikan gurami, sedangkan instrumen yang digunakan adalah lembar wawancara dan observasi. Setelah data dikumpulkan kemudian dianalisis mengguanakan metode analisis statistik deskriptif. Hasil penelitian menunjukkan eknologi pemberi pakan ikan efektif untuk digunakan. Sehingga dapat disimpulkan bahwa, pengembangan alat pemberi pakan ikan otomatis berbasis IoT dengan Fuzzy Logic Controller (FLC) mampu memberikan hasil yang akurat dalam menentukan jumlah pakan berdasarkan kualitas air kolam (suhu, ph, dan turbidity) yang mana jam pemberian pakan dilakukan secara real time meanggunakan RTC. Adanya alat ini petani diharapkan mampu memberikan pakan lebih efektif dan efisien dalam jumlah dan waktu pemberian pakan.
Monitoring Peternakan ikan Lele Berbasis IoT dengan Mikrokontroler ESP32 dan Sensor DS18B20 Agus Suwardono; Prahesti, Fidya Eka; Elsanda Merita Indrawati; Moh. Abd Jalil Ashofa
JST (Jurnal Sains dan Teknologi) Vol. 13 No. 3 (2024): Oktober
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jstundiksha.v13i3.85996

Abstract

Water quality and temperature are important parameters that need to be considered in fish farming. Inappropriate water quality and temperature parameters can inhibit fish growth, and can even cause fish death so that farmers experience economic losses for the pond. The focus of the problem in this research is that inappropriate water quality and temperature parameters can inhibit the growth of catfish or cause death, thereby economically harming the cultivation business. The process of monitoring water quality in catfish ponds which is carried out manually is considered less efficient because it does not provide real-time temperature control. This research aims to design and implement an Internet of Things (IoT)-based water quality monitoring system in catfish cultivation ponds, with a focus on real-time temperature regulation. This research is experimental research with the subject of catfish cultivation ponds. Data was collected through IoT-based system testing, and the results were analyzed using descriptive methods to evaluate the system's effectiveness in maintaining pool temperature in the range of 28°C–32°C. The research results show that the IoT-based catfish farm monitoring system with the ESP32 microcontroller and DS18B20 sensor functions well in monitoring water temperature in real-time. This system is capable of sending data wirelessly to a web or application-based monitoring platform, allowing users to monitor farm conditions anytime and anywhere. The implications of research on IoT-based catfish farm monitoring using an ESP32 microcontroller and DS18B20 sensors show the potential for transformation in aquaculture management , especially catfish farming.
Konsentrasi NaCL terhadap Tegangan, Arus Listrik, dan Kapasitansi Superkapasitor dengan Elektroda Arang Karbon Tectona grandis Sukma, Melani Dyah Ayu; Abdul Hafar As Ari; Suparno; Wipsar Suhu Brams Dewandaru, Wipsar Suhu Brams Dewandaru; Bayu Setiaji, Bayu Setiaji
JST (Jurnal Sains dan Teknologi) Vol. 13 No. 3 (2024): Oktober
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jstundiksha.v13i3.87915

Abstract

Salah satu material yang digunakan sebagai elektroda superkpasitor adalah arang berbasis karbon. Banyak penelitian menunjukkan bahwa sifat material elektroda dapat ditingkatkan melalui manipulasi struktur mikropori dan pengaruh medan listrik terhadap konduktivitas material tersebut. Namun, pemahaman lebih mendalam mengenai mekanisme dan hubungan antara medan listrik dengan konduktivitas arang masih perlu dikembangkan, terutama pada arang berbasis material alami seperti tanaman jati (Tectona grandis). Oleh karena itu, penelitian ini dilakukan dengan tujuan untuk mengetahui pengaruh medan listrik terhadap perubahan sifat konduktivitas arang, serta mengetahui potensi yang dapat dihasilkannya. Metode penelitian diawali dengan proses karbonisasi, kemudian dilakukan uji karakterisasi yang meliputi uji PSA untuk mengetahui ukuran partikel dan XRD untuk mengetahui kristalinitas materi. Hasil penelitian menunjukan bahwa terdapat hubungan antara karbon aktif arang kayu jati dengan NaCl sebagai larutan elektrolit pada superkapasitor, serta adanya potensi yang tercermin dengan nilai output tegangan, arus listrik, dan kapasitansi yang dihasilkan oleh superkapasitor yang masing-masing nilainya menunjukkan peningkatan. Implikasi dari penelitian ini yaitu dapat menjadi sumber referensi rujukan terkait pengaruh medan listrik terhadap konduktivitas arang karbon berbahan dasar tectona grandis dan NaCl sebagai elektrolit.
Connecting Connecting Local Wisdom and Social Media: Innovative Strategies in Building Economic Sustainability and Overcoming Unemployment Nurhalimah Harahap; Atika Hanan Julia Harahap
JST (Jurnal Sains dan Teknologi) Vol. 13 No. 3 (2024): Oktober
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jstundiksha.v13i3.90436

Abstract

The mismatch between the skills possessed by job seekers and the needs of the labor market causes unemployment. Based on this, this study aims to explore innovative strategies that connect local wisdom with social media to build economic sustainability and overcome unemployment. A mixed-method approach was used in this study. The three elements of local wisdom that are the focus of this study are Paloh Naga Agrotourism, Selayar Denai, and Pasar Kamu. The number of respondents was determined by as many as 30 people selected using the purposive sampling technique. The data collection method used questionnaires, interviews, and observations. The data collection instrument used a questionnaire sheet. The data analysis technique used qualitative and quantitative descriptive analysis. The study results showed that using social media, such as Instagram and Facebook, significantly increased the visibility and tourist visits to the agrotourism location. Social media is an effective promotional tool that introduces local uniqueness and opens up new jobs for the local community, both Generation Z and millennials. Combining local wisdom and digital strategies, this village has succeeded in increasing economic resilience by sustainably utilizing local natural and cultural potential. It is concluded that the synergy between local wisdom and social media supports economic growth in Kampoeng Lama Tourism Village and contributes to overcoming unemployment. This study's recommendation is to strengthen local communities' digital capacity and further develop elements of local wisdom to create a more integrated and inclusive tourism ecosystem.
Potensi Pigmen Fotosintesis dari Diatom Laut Ambon Navicula sp. TAD sebagai Bahan Tabir Surya Telussa, Ivon; Tanasale , Matheis F. J. D. P; Eka. R. M. A. P. Lilipaly; Penaonde , Astri Riany
JST (Jurnal Sains dan Teknologi) Vol. 14 No. 1 (2025): April
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jstundiksha.v14i1.64813

Abstract

Navicula sp. TAD adalah mikrorganisme fotosintetik yang memiliki pigmen fotosintesis yang didominasi senyawa karotenoid.  Karotenoid merupakan pigmen fotoproteksi yang melindungi mikroalga dari radiasi ultraviolet. Karakteristik ini memungkinkan beberapa mikroalga menjadi toleran terhadap sinar UV. Karakteristik pigmen ini dapat dimanfaatkan sebagai sumber bahan krim tabir surya yang dapat melindungi kulit dari paparan sinar matahari dengan intensitas cahaya yang tinggi. Pada Penelitian ini dilakukan  kultivasi Navicula sp. TAD, ekstraksi pigmen fotosintesis, uji antiokdisan, pembuatan tabir surya dan penentuan nilai Sun Protection Factor (SPF). Hasil penelitian menunjukkan bahwa Navicula sp. TAD mengandung karotenoid dan klorofil berturut-turut sebesar 0,745±0,096 dan 2,407±0,501 µg mL-1. Uji antioksidan dari pigmen fotosintesis menunjukkan nilai IC50 ekatrak kasar, β-karoten, santofil, klorofil a dan klorofil c berturut-turut sebesar 25,578; 15,164; 21,959; 20,001 dan 117,785. Krim tabir surya memiliki Nilai SPF tertinggi dengan menggunakan bahan klorofil a sebesar 3,787. Pigmen fotosintesis dari Navicula sp. TAD berpotensi sebagai bahan tabir surya.

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