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SINTESIS MATERIAL BESI BERPENDUKUNG ZnAl2O4 (Fe/ZnAl2O4) DAN KARAKTERISASINYA Angasa, Eka; Yudha, Sal Prima; Maryanti, Evi; Rahman, Taupik
Jurnal Riset Kimia Vol 4, No 2 (2011): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v4i2.125

Abstract

 ABSTRACT The aims of this work was to synthesize ZnAl2O4-supported iron material (Fe/ZnAl2O4). The Fe/ZnAl2O4 materials were prepared by impregnation of iron ions (FeCl3 and (NH4)2Fe(SO4)2 precursors) in solution to ZnAl2O4. Characterization of products using XRD shows that difractogram of Fe/ZnAl2O4 formed was similar to difractogram of Fe/ZnAl2O4 standard. This mean that ZnAl2O4-supported iron material has been successfully synthesized. Keywords: Iron, ZnAl2O4, impregnation
SINTESIS MATERIAL BESI BERPENDUKUNG ZnAl2O4 (Fe/ZnAl2O4) DAN KARAKTERISASINYA Eka Angasa; Sal Prima Yudha; Evi Maryanti; Taupik Rahman
Jurnal Riset Kimia Vol. 4 No. 2 (2011): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v4i2.125

Abstract

 ABSTRACT The aims of this work was to synthesize ZnAl2O4-supported iron material (Fe/ZnAl2O4). The Fe/ZnAl2O4 materials were prepared by impregnation of iron ions (FeCl3 and (NH4)2Fe(SO4)2 precursors) in solution to ZnAl2O4. Characterization of products using XRD shows that difractogram of Fe/ZnAl2O4 formed was similar to difractogram of Fe/ZnAl2O4 standard. This mean that ZnAl2O4-supported iron material has been successfully synthesized. Keywords: Iron, ZnAl2O4, impregnation
RANCANG BANGUN APLIKASI TABEL PERIODIK UNSUR DAN PERUMUSAN SENYAWA KIMIA DARI UNSUR KIMIA DASAR BERBASIS ANDROID Rian Agus Dwinata; Rusdi Efendi; Sal Prima Yudha
Rekursif: Jurnal Informatika Vol 4, No 2 (2016): Volume 4 Nomor 2 Juni 2016
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (387.989 KB) | DOI: 10.33369/rekursif.v4i2.888

Abstract

Animasi 3D dan informasi yang interaktif dapat membantu siswa dalam memahami suatu pembelajaran. Aplikasi yang dibutuhkan dalam dunia pendidikan saat ini, berupa aplikasi yang menarik, edukatif, interaktif dan menggunakan teknologi terbaru. Oleh karena itu, penulis bermaksud membangun sebuah aplikasi tabel periodik unsur dan perumusan senyawa kimia berbasis Android. Aplikasi ini dibangun dengan Unity 3D dengan bahasa pemrograman JavaScript yang mengandung unsur teks, informasi, dan animasi yang dirancang semenarik mungkin agar menarik user untuk menggunakan aplikasi ini dan dapat membantu pembelajaran di bidang kimia. Metode pengembangan sistem pada aplikasi ini menggunakan metode waterfall. Sedangkan untuk merancang sistem, penulis menggunakan Unified Modelling Language (UML). Hasil akhir dari penelitian ini adalah terciptanya sebuah aplikasi tabel periodik unsur dan perumusan senyawa kimia berbasis Android yang dapat berguna dalam pembelajaran tentang tabel periodik dan juga perumusan senyawa kimia. Pengujian aplikasi telah dilakukan dengan responden sebanyak 50 orang, didapatkan hasil bahwa aplikasi memiliki tampilan yang user friendly dengan nilai rata-rata 3.90 (baik), mudah dalam penggunaan sistem dengan nilai rata-rata 4.13 (baik) dan memiliki kinerja sistem yang baik dengan nilai rata-rata 3.89 (baik).Kata Kunci: Kimia, Tabel Periodik, Senyawa, Android, Unity 3D, JavaScript, Unified Modelling Language (UML).
Profil Morfologi dan Difraksi Arang Hasil Pirolisis Beberapa Jenis Kayu Lokal Provinsi Bengkulu, Indonesia: Morphology and Diffraction Study of Charcoal By-Products from the Pyrolysis of Several Local Woods from Bengkulu Province, Indonesia Nurwidiyani, Ria; Triawan, Deni Agus; Rahman, Arief Aulia; Yudha, Sal Prima
KOVALEN: Jurnal Riset Kimia Vol. 10 No. 3 (2024): December Edition
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/kovalen.2024.v10.i3.17289

Abstract

Wood, as a basic material for the furniture industry, creates waste problems in the form of wood sawdust. Wood sawdust is a material that can be utilized by processing it through a pyrolysis process to produce liquid smoke and charcoal. Charcoal resulting from sawdust pyrolysis of Azadirachta excelsa, Durio zibhetinus, Swietenia mahagoni, and Coffea sp. wood has different characteristics. Pyrolysis was carried out at 300–350 °C for 6 hours. Characterization was carried out using SEM-EDS and XRD. Based on the research, it is known that the character of the charcoal resulting from pyrolysis using XRD shows that the charcoal composition of each wood has similar characteristics, as indicated by the presence of a broad peak at 2 theta 25° indicating that the charcoal formed has an amorphous structure. In comparison, the 2 theta peaks of 17° and 29° respectively, indicate the presence of lignin and CaCO₃ in charcoal. The morphological structure of the charcoal surface based on the results of SEM analysis shows a similarity in morphology between Swietenia mahagoni and Coffea sp. Wood charcoal with small pore diameters and distances apart, as well as between Durio zibhetinus and Azadirachta excelsa wood charcoal, which resembles a honeycomb structure. The composition of charcoal resulting from pyrolysis shows that the largest component of charcoal is carbon with a percentage of 45.4-56%, calcium with a percentage of 10-15.2%, and oxygen with a percentage of 22.5-38.4%, with minor components in the form of aluminum, boron, silicon, and potassium.
Identification of Drug Related Problems (DRPs) Use of Antibiotics in Pediatric Pneumonia Patients at General Hospital Bengkulu City Mahardika, Halwa Balqis; Dian Handayani; Rahmawati, Reza; Yudha, Sal Prima
Pharmacon: Jurnal Farmasi Indonesia Volume 22, No 2 (2025)
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/pharmacon.v22i2.6672

Abstract

Pneumonia in pediatrics has a high mortality rate. Primary antibiotic therapy can increase antibiotic use and cause Drug Related Problems (DRPs). This study examines the treatment profile and identifies DRPs of antibiotic use in pediatric pneumonia patients at Ummi General Hospital, Bengkulu City. This study uses a cross-sectional approach method where data is collected retrospectively through patient medical records. The population includes all pediatric patients with the main disease community-acquired-pneumonia who were treated at the Ummi General Hospital, Bengkulu City during the July-December 2022 period. The sampling technique in this study was using purposive sampling. Data was analyzed univariately, and DRPs were identified using the Pharmaceutical Care Network Europe Foundation (PCNE) algorithm version 9.1 and analyzed descriptively. The treatment profile included ampicillin inj + gentamicin inj (54.7%), sultamicillin inj (15.8%), sultamicillin inj + gentamicin inj (8.4%), ampicillin inj (8.4%), gentamicin inj (7.4%), ceftriaxone inj (3.2%), and sultamicillin inj + gentamicin inj + ceftriaxone inj (2.1%). There were 367 cases in 95 patients. Cases of DRPs included overdose (27.8%), the duration of treatment is too short (22.9%), infrequent dose regimen (18.8%), adverse drug incidence (16.9%), underdose (10.1%), drugs not following the guidelines (1.9%), the duration of treatment is too long (1.1%), and therapeutic group duplication (0.5%). The study concluded that the most common treatment was ampicillin inj + gentamicin inj (54.7), with the most frequent DRPs being overdose (27.8%), the duration of treatment is too short (22.9%), infrequent dose regimen (18.8%), adverse drug incidence (16.9%), and underdose (10.1%).