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All Journal Jurnal Zarah IJEMS (Indonesian Journal of Environmental Management and Sustainability) Eksakta : Berkala Ilmiah Bidang MIPA International Journal of Educational Best Practices Journal of Science and Clinical Pharmacy Research
Deswati
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Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Education Energy Engineering Environmental Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Public Health Social Sciences Other

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THE IMPLEMENTATION OF 5E LEARNING CYCLE MODEL ON THE TOPIC ‘STRUCTURE AND FUNCTION OF PLANTS’ TO IMPROVE THE SCIENTIFIC LITERACY OF THE SECOND YEAR STUDE Suryawati, Evi; Natalina, Mariani; Nadia; Deswati
International Journal of Educational Best Practices Vol. 2 No. 2 (2018)
Publisher : Prodi Administrasi Pendidikan Program Pascasarjana Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/ijebp.2.2.26-33

Abstract

This study aims to improve student’s science literacy skills by using 5E Learning Cycle model. The treatment was conducted collaboratively for the topic ‘Structures and functions of plants’ involving Biology lectures, pre-service teachers, and the science school teachers of SMPN 21 Pekanbaru in August 2018. The focus of the observation was on science literacy and learning activities of students, both individually and in groups. Science literacy including scientific, procedural and epistemic knowledge was measured through worksheets. While the aspects of explaining scientific phenomena, evaluating and design scientific investigations, interpreting data, and the evidence were measured using an assessment sheet performance. Curiosity, scientific argumentation and environmental awareness were measured using the observation sheet. Learning activities carried out inside and outside the classroom had a positive impact on literacy skill science. The data showed the students individually or in groups could answer questions in the worksheet, more actively engaged, more enthusiastic and more curious when observing, identifying and grouping plants using real objects around school environment. Some questions arose from students when identifying corn and carrot plants about vegetative and generative structures. Overall, the implementation of 5E Learning Cycle model can improve students' scientific literacy in learning science at SMPN 21 Pekanbaru.
Utilization of Coffee Peel Waste as Biosorbent for Rhodamine B Dye Removal: Isotherm, Kinetics, and Thermodynamic Studies Zein, Rahmiana; Prestica, Yona; Deswati; Ramadhani, Putri
Indonesian Journal of Environmental Management and Sustainability Vol. 9 No. 1 (2025): March
Publisher : Magister Program of Material Science, Graduate School of Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/ijems.2025.9.1.36-45

Abstract

Coffee Peel Waste (CPW) is an abundant and inexpensive material that can be employed as a biosorbent to remove Rhodamine B (RB) dye from wastewater. This research utilized the batch adsorption approach to optimize the parameters of pH, starting concentration of dye and period of contact. At pH 8, 1000 mg/L as the starting concentration and 105 minutes as the contact time, the optimal conditions were established, exhibited an adsorption capacity of 71.8454 mg/g, aligning with the Langmuir isotherm model, wherein mechanism of adsorption demonstrated monolayer adsorption, and was most appropriate for the kinetic model of pseudo-second order. Thermodynamic analysis revealed that the adsorption occurred spontaneously and released heat, confirming its exothermic nature. FTIR characterization identified the functional sites involved in the adsorption mechanism. At the same time, SEM-EDX analysis showed morphological changes and an increase in some aspects after adsorption, confirming the attachment of RB to the surface of the CPW. This study reveals the advantages of CPW as an innovative, efficient and sustainable biosorbent, offering a new solution in wastewater treatment based on agro-industrial waste.
KARBON AKTIF BERPORI DARI KULIT JERUK (Citrus sinensis (L.) Osbeck) MELALUI METODA DEHIDRASI UNTUK  KAPASITOR ELEKTROKIMIA Norita Tetra, Olly; Aziz, Hermansyah; Deswati; Aghna Kamiko, Awfa Joti
Jurnal Zarah Vol. 12 No. 1 (2024): Jurnal Zarah
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Maritim Raja Ali Haji

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Abstract

Limbah kulit jeruk (Citrus sinensis (L.) Osbeck)  adalah precusor karbon aktif yang ramah lingkungan dan ekonomis untuk bahan elektroda kapasitor elektrokimia. Pada penelitian ini kulit jeruk telah dimanfaatkan sebagai precusor karbon aktif berpori melalui metoda dehidrasi dengan H2SO4 dan penambahan aktivator KOH pada suhu karbonisasi 400°C.  Karbon aktif yang dihasilkan terdiri dari karbon (71,42%) dan oksigen (28,58%), dengan volume pori  adalah   0,04281 cm³/g, diameter pori   2,57 nm  dan luas permukaan 140 m2/g dengan struktur dominan mesopori dan sedikit mikropori. Kinerja kapasitor elektrokimia dengan menggunakan karbon aktif dari kulit jeruk mencapai 10,75 mF dengan jumlah elektron 647,365 x 1015 elektron pada kondisi luas permukaan elektroda 3x3 cm2, ketebalan elektroda 0,15 cm dan elektrolit H3PO4 0,3 N. Hasil penelitian ini menunjukkan bahwa sintesis karbon aktif kulit jeruk melalui dehidrasi asam memberikan keuntungan dalam segi efisiensi biaya, waktu  dan proses preparasi  untuk menghasilkan karbon aktif  berpori dengan luas permukaan yang tinggi sebagai kapasitor elektrokimia berkinerja tinggi.
The Impact of Biofloc on Fish Growth Indicators and Health Risks Assesment from Polyethylene Terephthalate Microplastic Contamination Afriani, Dian Rizky; Deswati; Rahmiana Zein
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 26 No. 02 (2025): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/eksakta/vol26-iss02/594

Abstract

This study aims to evaluate the effects of biofloc technology on the growth performance of Nile tilapia (Oreochromis niloticus) and to assess potential health risks associated with polyethylene terephthalate (PET) microplastic contamination in aquaculture systems. Three treatments were applied: aquaculture without biofloc and microplastics, aquaculture with biofloc but without microplastics, and aquaculture with biofloc combined with PET microplastics. The novelty of this research lies in the integration of biofloc technology with a quantitative health risk assessment approach aspect that has received limited attention in previous studies. Furthermore, this study specifically utilizes PET microplastics, which differ in physicochemical properties and toxicological potential from the commonly studied polyethylene (PE) microplastics. The results revealed that the best performance was observed in the treatment with biofloc but without microplastics, showing an average body weight (ABW) of 5.478 g/fish, an average daily gain (ADG) of 2.343 g/fish/day, and a specific growth rate (SGR) of 4.208%. In terms of health risk, this treatment also demonstrated low to moderate risk levels, with a Polymer Load Index (PLI) of 2.53, a Potential Health Index (PHI) of 11, and a Potential Ecological Risk Index (PERI) of 10. These findings indicate that biofloc technology is not only effective in enhancing fish growth performance but also contributes to mitigating the adverse impacts of microplastic contamination on fish health and food safety in aquaculture systems.
KOAGULASI RAMAH LINGKUNGAN DENGAN KAPUR SIRIH (Ca(OH)₂) UNTUK PENGHILANGAN MIKROPLASTIK PADA IKAN BILIH (Mystacoleucus padangensis) DARI DANAU SINGKARAK, WILAYAH TANAH DATAR, SUMATERA BARAT, INDONESIA Aiwa Putra, Zaki; Deswati; Rahmiana Zein
Jurnal Zarah Vol. 13 No. 2 (2025): Jurnal Zarah
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Maritim Raja Ali Haji

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Abstract

Kapur sirih (Ca(OH)₂) diteliti sebagai koagulan anorganik yang tersedia secara lokal dan ramah lingkungan untuk mengurangi kontaminasi mikroplastik pada ikan bilih (Mystacoleucus padangensis) dari Danau Singkarak, Tanah Datar, Sumatera Barat, Indonesia. Studi ini mengevaluasi efisiensi koagulasi, kondisi operasi optimal, dan mekanisme yang mendasari. Penghilangan optimal dicapai pada konsentrasi koagulan 5%, waktu kontak 60 menit, dan kecepatan pengadukan 300 rpm. Penambahan 5% NaCl secara signifikan meningkatkan kemampuan pengurangan mikroplastik, mencapai efisiensi hingga 70,73%. Analisis morfologis dengan Scanning Electron Microscopy (SEM) menunjukkan pembentukan gumpalan besar, mengindikasikan interaksi fisik antara mikroplastik dan endapan kalsium hidroksida. Penurunan nilai zeta potensial setelah koagulasi menunjukkan netralisasi muatan yang efektif dan destabilisasi koloid. Hasil ini menyoroti kapur sirih sebagai koagulan yang menjanjikan, berbiaya rendah, dan berkelanjutan untuk mengurangi polusi mikroplastik di lingkungan air tawar, terutama di daerah danau.
TINGKAT KEPUASAN DOKTER, PETUGAS FARMASI, DAN PASIEN RAWAT JALAN TERHADAP SISTEM PELAYANAN RESEP ELEKTRONIK DI RUMAH SAKIT OTAK DR. Drs. M. HATTA BUKITTINGGI Juliasmi, Riri; Deswati; Afriani, Tika
Journal of Science and Clinical Pharmacy Research Vol. 1 No. 1 (2025): February 2025
Publisher : LPPM Universitas Mohammad Natsir Bukittinggi

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Abstract

Penerapan resep elektronik merupakan salah satu strategi untuk mengurangi kesalahan pengobatan (medication error) guna meningkatkan kualitas pelayanan di rumah sakit. Namun, dalam implementasinya, masih terdapat tantangan terkait interaksi antara teknologi dan sumber daya manusia, serta pengelolaan dan evaluasi yang belum optimal. Peresepan elektronik memungkinkan dokter menulis resep secara digital dan mengirimkannya langsung ke apotek dalam jaringan sistem peresepan elektronik. Penelitian ini bersifat deskriptif analitik dengan metode probability sampling. Sampel penelitian terdiri atas 30 dokter, 35 petugas farmasi, dan 100 pasien rawat jalan yang diberikan kuesioner sebagai alat ukur. Hasil penelitian menunjukkan bahwa tingkat kepuasan terhadap sistem pelayanan resep elektronik di Rumah Sakit Otak Dr. Drs. M. Hatta Bukittinggi sangat tinggi, dengan persentase kepuasan sebesar 90% pada dokter, 88% pada petugas farmasi, dan 86,8% pada pasien rawat jalan. Analisis statistik menunjukkan bahwa tidak terdapat hubungan signifikan antara faktor demografi (jenis kelamin, usia, pendidikan, pekerjaan, dan penghasilan) dengan tingkat kepuasan responden (p > 0,05). Hasil penelitian ini diharapkan dapat menjadi bahan evaluasi untuk meningkatkan efektivitas sistem peresepan elektronik dalam pelayanan kesehatan. Kata kunci : Kepuasan, Resep Elektronik, Dokter, Petugas Farmasi, dan Pasien Rawat Jalan
Co-Authors Afriani, Dian Rizky Afriani, Tika Aghna Kamiko, Awfa Joti Aiwa Putra, Zaki Evi Suryawati Hermansyah Aziz Juliasmi, Riri Mariani Natalina Nadia Norita Tetra, Olly Prestica, Yona Putri Ramadhani, Putri Rahmiana Zein