Article Per Year (5 Year)
p-Index From 2021 - 2026
3.421
P-Index
This Author published in this journals
All Journal Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Journal of Aceh Physics Society JURNAL PENGABDIAN KEPADA MASYARAKAT Science and Technology Indonesia Journal of Applied Geospatial Information Jurnal Penelitian Pendidikan IPA (JPPIPA) INDONESIAN JOURNAL OF APPLIED PHYSICS Abdimas Talenta : Jurnal Pengabdian Kepada Masyarakat Journal of Applied Engineering and Technological Science (JAETS) Hydrogen: Jurnal Kependidikan Kimia Journal of Sustainable Community Development (JSCD) Journal of Technomaterial Physics Prisma Sains: Jurnal Pengkajian Ilmu dan Pembelajaran Matematika dan IPA IKIP Mataram Jurnal Natural Aceh International Journal of Science and Technology International Journal of Oil Palm
Martha Rianna
Departemen Fisika, Universitas Sumatera Utara, 20155 Medan, Indonesia
Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Neuroscience Physics Social Sciences Other

Published : 29 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 29 Documents
Search

 1   2   3 
Increasing the Economic Value of Hydrogel as an Alternative Planting Media at Madrasah Aliyah Swasta Muhammadiyah Sidomulyo Hamid, Muhammadin; Simanjuntak, Crystina; Rianna, Martha; Amaturrahim, Suci Aisyah; Saragi, Indah Revita; Felly, Putri Aldika; Siahaan, Chyntia; Waruwu, Delima; Talanda, Aknes; Tambunan, Miranda
ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat Vol. 9 No. 1 (2024): ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/abdimastalenta.v9i1.16316

Abstract

Hydrogel technology can be used as a solution for indoor growing media. Hydrogel is a three-dimensional polymer network with cross-linked hydrophilic polymers, which are capable of swelling or storing water and physiological solutions up to thousands of times their dry weight, and are not easily soluble. To increase knowledge about ornamental plant cultivation using hydrogel media, a service was carried out by using partners at the Madrasah Aliyah Swasta Muhammadiyah Sidomulyo. This service aims to provide solutions to partners in the form of alternative hydrogel-based planting media made from alginate that are environmentally friendly which can be used as moisture and nutrient control agents. This goal is achieved through outreach activities, training, and the application of alternative planting media on ornamental plants. The target of the results to be achieved is to increase the economic value of hydrogels and to foster the entrepreneurial spirit of the students of Madrasah Aliyah Swasta Muhammadiyah Sidomulyo.
The Renewable Water Filtration Innovation From Palm Oil Mill Effluent Waste Sufina Azzahra; Martha Rianna; Nabila Agustin
International Journal of Oil Palm Vol. 7 No. 3 (2024)
Publisher : Indonesian Oil Palm Society /IOPS (Masyarakat Perkelapa-sawitan Indonesia /MAKSI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35876/ijop.v7i3.124

Abstract

Indonesia is the largest palm oil producing country in the world. According to data from the North Sumatra BPS in 2021, Palm Oil production was 5,311,884 tons. Every palm oil factory disposes of its liquid waste which results in waste pollution becoming a very crucial issue to be addressed immediately because it has many negative impacts. POME is rich in minerals and carbon, but POME waste is currently not fully utilized optimally. The purpose of this research is to produce the latest innovation in water filtration to realize SDGs 2045 on clean water and sanitation and to study the effectiveness of magnetic which will be applied as clean water filtration by utilizing POME waste and natural sand containing ?-Fe2O3, alumina (Al2O3) and magnetic minerals with well water as samples in this study. The combination of POME waste and natural sand with chemical synthesis and calcination methods at a temperature of 500oC as activation of activated carbon and magnetic metals. The results of the synthesis of POME and natural iron sand obtained solids in the form of black powder. In the VSM test, the magnetization versus magnetic field data of Fe3O4/activated carbon POME obtained a magnetic saturation value of 10.13 emu/g. In the XRD test results of activated carbon materials, composites of activated carbon iron oxide and iron oxide and the synthesis results have diffraction patterns similar to the XRD database from JCPDS and in the COD and BOD tests, it proves a decrease in COD and BOD levels in well water before and after filtration with a large range, this indicates the success of the filtration process. In the AAS test as an identification of Fe metal in well water samples, Fe metal becomes <0.00206 (mg/L) starting from 0.01 (mg/L).
Microwave Absorption Analysis of Barium Hexaferite And Iron Sand Naibaho, Yeni P. S.; Humaidi, Syahrul; Rianna, Martha; Diana, Linda E.
Journal of Applied Geospatial Information Vol. 8 No. 1 (2024): Journal of Applied Geospatial Information (JAGI)
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jagi.v8i1.7732

Abstract

The goal of this study is to investigate the properties of barium hexaferrite and iron sand as microwave absorbers. The focus is on understanding how these materials affect microwave absorption and the specific frequency range of waves they produce. The solid reaction method was used in the study. The study's findings indicate that the combination of iron sand with barium hexaferrite material leads to the formation of a homogeneous material with a single phase. X-ray diffraction pattern data confirms the presence of a single-phase material, specifically iron sand and barium hexaferrite, which consists of hematite and barium hexaferrite. The VNA observations reveal that the iron sand and barium hexapherite materials can absorb electromagnetic waves at a radar wave frequency of 11.1 GHz, resulting in a loss of -23.86 dB. Furthermore, the material demonstrates its ability to absorb microwaves. The absorption of microwaves relies on the quantity of particles in the absorbent substance and its microwave-absorbing capacity. To thoroughly assess the absorption properties of various samples, it is essential to not only evaluate their reflection loss but also analyze how well they operate as microwave absorbers.
Characterization of Iron Sand and Nickel Oxide on Crystal Structure as Microwave Absorbing Material Diana, Linda E.; Rianna, Martha; Syahwin, Syahwin; Naibaho, Yeni P. S.
Journal of Applied Geospatial Information Vol. 8 No. 1 (2024): Journal of Applied Geospatial Information (JAGI)
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jagi.v8i1.7733

Abstract

We have carried out a thorough investigation to scrutinize the characteristics of iron sand and nickel oxidizer, focusing on their crystal structure as microwave-absorbing materials. The study investigates the impact of these materials on microwave absorption characteristics and the frequency range of the resulting waves. The solid-state reaction method is used in the research methodology. The research findings indicate that the combination of iron sand and nickel oxide leads to the formation of a homogeneous substance. The X-ray diffraction pattern data reveals the presence of two single-phase materials: iron sand, which consists of hematite, and nickel oxide. The iron sand and nickel oxide materials underwent characterization using EDS, revealing a composition that closely approximated stoichiometry. A Vector Network Analyzer (VNA) test shows that the iron sand and barium hexaferrite mix may be able to effectively absorb electromagnetic waves at a radar frequency of 12 GHz, leading to a -24 decibels (dB) drop.
Characterization of Barium Hexaferrite and Iron Sand as Microwave Absorbing Materials Naibaho, Yeni P.S; Humaidi, Syahrul; Rianna, Martha; Diana, Linda
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 2 (2024): April-May 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i2.11776

Abstract

This research aims to analyze the characteristics of Barium Hexaferite and iron sand as microwave absorbing materials, their influence on microwave absorption properties, and the frequency range of waves produced by these materials. The research method used is the Co-Precipitation method. Dissolve barium hexapherite and iron sand in distilled water with the appropriate mass ratio. The results of this study show that the synthesis of iron sand and barium hexapherite material produces a single phase material. The single phase material is shown through X-ray diffraction pattern data, namely iron sand and barium hexapherite, namely hematite and barium hexapherite. Iron sand and barium hexapherite materials are characterized using EDS which shows a composition that is close to stoichiometry. Observations using VNA show that iron sand and barium hexapherite materials are able to absorb electromagnetic waves at a radar wave frequency of 11.1 GHz, which is -25.64 dB.
Synthesis and Characterization of PVA-Enzyme/GA/PANI-HCl Indicator Membrane Electrodes; PANI-p-toluentsulfonic acid/PVC-KTpClPB-o-NPOE, SEM-EDX, XRD and FTIR Analysis Abd Hakim S; Martha Rianna; Jane Elnovreny
Jurnal Penelitian Pendidikan IPA Vol 9 No 10 (2023): October
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9i10.4918

Abstract

Research has been carried out on the indicator electrode PVA-Enzyme/GA-2.9%/PPy+Sulfonic Acid/PVC-KTpClPB-o-NPOE, the amorphous spectral pattern is greatly reduced for variations of the enzyme 0.6 g in 0.5 mL (50% water + 50% alcohol) . PVA-Enzyme/GA-2.9%/PPy+Sulfonic Acid/PVC-KTpClPB-o-NPOE indicator electrode, denoted As-1. Analysis of the linear curve of the As-1 sample with a sensitivity of 41.56 mV/decade, a detection range of 10-4 - 10-1 M and a detection limit of 10-4 M, R2 = 97.51 %. To increase the sensitivity, detection range, detection limit and confidence level of R2. Indicator electrodes were made with variations of the urease enzyme on PVA and o-NPOE variations on PVC-KTpClPB 61% and 66% and replacement of PANI conductive polymer. PANI conductive polymer was dissolved in hydrochloric acid HCl denoted PANI-HCl and p-toluensulfonic acid is denoted by PANI-p-toluensulfonic acid. SEM analysis shows that the morphology of S3 is greater than that of S2. Analysis of the cps/eV EDX voltage range is greater than S3 to S2. Analysis of the XRD intensity spectrum pattern on the 2theta diffraction angle is greater than S3 to S2. Likewise, the analysis of the %Transmittance FTIR spectrum pattern for wave numbers S3, S6, S8 is higher than S2. The best result according to material analysis is S3. 
The Effect of Tetraethil OrthoCilicate (TEOS) on Fe3O4 Nanoparticles Addition in Electrical Indri Dayana; Habib Satria; Martha Rianna
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 14, No 1 (2024): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v14i1.74558

Abstract

Magnetite Nanoparticles of pure (Fe3O4) and Fe3O4 with TEOS addition have been successfully synthesized from natural iron sand using the coprecipitation method. The purpose of this study is to provide information on the effect of TEOS to Fe3O4 on the electrical properties. The effect of TEOS addition to Fe3O4 indicates that the increase in true density results is 4.95 gr/cm3. The stability of nanolubricant on Fe3O4 nanoparticles with the addition of TEOS 1.2 ml was dispersed homogeneously. The value of thermal conductivity also increases due to TEOS addition on Fe3O4 nanoparticles in a volume fraction of 0.8% of 1,631 W/m.K and the heat of the type produced was 718.44 J/kg.K. The effect of TEOS addition on Fe3O4 nanoparticles produces good electrical properties of stability in the nano-lubricant.
Management of Electric Field under the Sag of High Voltage Overhead Transmission Lines Mester Sitepu; Martha Rianna
Journal of Technomaterial Physics Vol. 2 No. 1 (2020): Journal of Technomaterial Physics
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jotp.v2i1.5261

Abstract

There have been many methods used to determine the electric field strength under the 150 KV overhead transmission lines (OHTL). Since it is simple and can be used for a homogeneous and multilayer medium, the method chosen for modeling the electric field under the OHTL is the complex image method (CIM). The results obtained show that the electric field strength obtained by the CIM is in agreement with that obtained by Complex Determine Method (CDM). Furthermore, the results obtained from the CIM model fit well with the field data. The OHTL height that must be raised so that the electric field strength under the OHTL will meet the WHO quality standards is 3 m at location A and 2 m at location B. These results show that modelling the electric field under the OHTL using CIM is exellent.
Influence of Mode of Hydrothermal Treatment and Precursor State on Phase Formation and Crystallinity of Sodium Titanate Ervina Putri Wulandari; Zikri Noer; Martha Rianna; Syahrul Humaidi; Muhammad Abduh Akram Agus; Alya Nazwariva; Jihan Murtadha Rambe
Journal of Technomaterial Physics Vol. 8 No. 1 (2026): Journal of Technomaterial Physics
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jotp.v8i1.24729

Abstract

Sodium titanate was synthesized via a sol–gel-assisted hydrothermal method to study phase evolution and crystallinity under different hydrothermal treatment conditions and precursor compositions. Four processing routes were designed: continuous hydrothermal treatment (24 h), interrupted hydrothermal cycles (3 × 8 h), dried-gel hydrothermal treatment, and fresh-gel hydrothermal treatment. X-Ray Diffraction (XRD) was used to analyze the resulting crystal phases and crystallite sizes. Continuous treatment of fresh gel produced monoclinic Na₂Ti₆O₁₃ with small crystallites (12.4 nm), while interrupted processing increased crystallite size to 15.5 nm. Pre-drying of the sol–gel precursor prior to continuous hydrothermal treatment yielded well-defined Na₂Ti₆O₁₃ with enhanced crystallinity and larger crystallites (27.6 nm). In contrast, insufficient precursor stabilization redirected phase evolution toward monoclinic Na₂TiO₃ despite comparable crystallite size. The results demonstrate that the hydrothermal treatment mode primarily governs crystallite growth, whereas the precursor state controls phase selectivity. These findings provide a clear synthesis–structure relationship for tailoring sodium titanate materials.
Co-Authors Achmad Maulana Soehada Sebayang Adhi Wibowo Adi Rahwanto Agoez Loeqman Alya Nazwariva Amaturrahim, Suci Aisyah Anggito P Tetuko Anggito P Tetuko Anggito P. Tetuko Anggito P. Tetuko, Anggito P. Awan Pelawi Candra Kurniawan Dadan Ramdan David Arianto Hutajulu Diana, Linda Diana, Linda E. Eko Arief Setiadi Eko Arief Setiadi Eko Arief Setiadi Eko Arief Setiadi, Eko Arief Ervina Putri Wulandari Felly, Putri Aldika Fitri Handayani Fitri Handayani Goldbert Harmuda Duva Sinaga Guk-Guk, Herwati Permata Indah Raja Habib Satria Habib Satria Habib Satria Hakim S, Abd Hamid, Muhammadin Hariyati Lubis, Hariyati Hussain, Muhammad Khalid Indri Dayana Jane Elnovreny Jihan Murtadha Rambe Juliaster Marbun Junedi Ginting Maksi Ginting Marhaposan Situmorang Marhaposan Situmorang Marhaposan Situmorang Marhaposan Situmorang Marhaposan Situmorang Masno Ginting Masno Ginting Mester Sitepu Moranain Mungkin Muhammad Abduh Akram Agus Muhammad Fadlan Siregar Muhammadin Hamid Muhammadin Hamid Nabila Agustin Naibaho, Yeni P. S. Naibaho, Yeni P.S Noverita Sprinse Vinolina Nurul Maulida R Nasution Nurwijayanti Patra Mesiari Tarigan Perdamean Sebayang Perdamean Sebayang Perdamean Sebayang Perdamean Sebayang Putri Cahaya Situmorang Saragi, Indah Revita Shiamny Nur Khair Tarigan Siahaan, Chyntia Siahaan, Doni Aldo Sianturi, Herty Afrina Silviana Simbolon Simanjuntak, Crystina Siti Utari Rahayu Sitorus, Kurnia Jesiska Sufina Azzahra Sugianto &#039; Syahrul Humaidi, Syahrul Syahwin, Syahwin Talanda, Aknes Tambunan, Miranda Timbangan Sembiring Timbangen Sembiring Tua Raja Simbolon Waruwu, Delima Wina Rahmadani Rangkuti Yahya Darmawan Yoga Pratama Zikri Noer Zikri Noer