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All Journal Komunikasi Fisika Indonesia Jurnal Teknosains Jurnal Rekayasa Material, Manufaktur & Energi Fisitek : Jurnal Ilmu Fisika dan Teknologi Saintifik : Jurnal Matematika, Sains, dan Pembelajarannya Jurnal Elemen Jurnal Kumparan Fisika Pascal: Journal of Physics and Science Learning Navigation Physics : Journal of Physics Education Mimbar Kampus Journal of Technomaterial Physics Jurnal Energi Baru dan Terbarukan CHEDS: Journal of Chemistry, Education, and Science EINSTEIN (E-JOURNAL)
Jumiati, Ety
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Religion Aerospace Engineering Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Other

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PENGARUH PENYERAPAN AIR DAN POROSITAS PADA KERAMIK BERPORI BERBAHAN CLAY DAN PUNTUNG ROKOK Nasution, Annisa Salsha Safira; Jumiati, Ety; Husnah, Miftahul
Jurnal Energi Baru dan Terbarukan Vol 5, No 1 (2024): Maret 2024
Publisher : Program Studi Magister Energi, Sekolah Pascasarjana, Universitas Diponegoro, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jebt.2024.20664

Abstract

Keramik berpori adalah suatu keramik yang mempunyadistribusi ukuran tertentu dan porositas yang relatif tinggi. Penelitian ini bertujuan untuk mengetahui pengaruh bahancampuran puntung rokok pada sifat fisis keramik berpori. Variasi komposisi campuran puntung rokok dan clay  antaralain sampel A sebesar (20%;80%), sampel B sebesar(30%;70%), dan sampel C sebesar (40%;60%). Denganpengujian sifat fisis yaitu penyerapan air dan porositas. Sifatfisis yang sudah diuji diperoleh nilai rat-rata adalah15,14%-22,82%. Pada porositas diperoleh nilai rata-rata adalah 9,59%-12,76%. Hasil pengukuran penyerapan air, dan kuat tekan sudah sesuai dengan nilai SNI 8640:2018 tentang standar mutu bata ringan dengan pasang dinding. Variasi pencampuran yang paling optimum diperoleh padasampel C 40%;60% dengan nilai penyerapan air yaitu22,82% dan porositas yaitu 11,88% 
EFEKTIVITAS BRIKET KULIT PINANG TERHADAP PENURUNAN NILAI KADAR AIR DAN NILAI DENSITAS Rani Saputri; Jumiati, Ety; Sirait, Ratni
ELEMEN : JURNAL TEKNIK MESIN Vol. 10 No. 2 (2023)
Publisher : POLITALA PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34128/je.v10i2.267

Abstract

Utilization of briquettes as an alternative biomass energy source is possible. Biomass is a renewable energy source that is becoming increasingly important throughout the world. This has the potential to reduce human dependence on fossil fuels. This research aims to determine the effectiveness of reducing the water content and density values of areca nut shell briquettes. The raw materials used in making briquettes are areca nut shells and arpus adhesive, with each percentage of material and adhesive composition, namely sample A (55% : 45%), sample B (60% : 40%), sample C (65% : 35%), and sample D (70% : 30%). The results of this research obtained a water content value of 6.36% - 4.82% and a density value of 0.534 g/cm3 - 0.599 g/cm3. This water content value meets SNI 01-6235-2000 regarding wood charcoal and these briquettes are suitable to be used as a substitute for charcoal on a household scale.
PENINGKATAN KUALITAS NILAI KADAR AIR DAN KADAR ZAT TERBANG PADA SERBUK KARBON AKTIF TEMPURUNG KELAPA DENGAN VARIASI SUHU AKTIVASI Siti Putri Masyitah; Jumiati, Ety; Sirait, Ratni
ELEMEN : JURNAL TEKNIK MESIN Vol. 10 No. 2 (2023)
Publisher : POLITALA PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34128/je.v10i2.268

Abstract

This research aims to determine the characteristics of coconut shell activated carbon in powder and granular form using quantitative methods. Making activated carbon consists of preparation, carbonization and activation. Then the physical properties were tested and the analysic. Actived carbon is made through a carbonization stage at a temperature of 400°C for 2 hours and activation at a temperature of 800°C, 900°C, and 1000°C for 1 hour. The parameters used are air content and volatile substance content with active carbon quality requirements based on SNI No. 06-3730-1995. The research results showed that the best quality powdered activated carbon at a temperature of 1000°C with an air content of 6.4% and a volatile matter content of 15.2%
Pengaruh Nilai Uji Tarik Terhadap Kuat Impak pada Komposit Serat Daun Nanas Hutauruk, Siti Aulia; Jumiati, Ety; Daulay, Abdul Halim
Rekayasa Material, Manufaktur dan Energi Vol 7, No 2: Juli 2024
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v7i2.20288

Abstract

Research has been conducted to determine the effect of tensile test values on impact strength. Using an experimental method and a quantitative approach, the variations in the composition of pineapple leaf fiber with polyester resin adhesive are as follows: sample A (40%:60%), sample B (45%:55%), sample C (50%:50%), and sample D (55%:45%). The molding process used a hot press with a pressure of 0.1 MPa and a temperature of 150°C for 15 minutes. The preparation and testing of specimens referred to ASTM D638-03 for tensile testing and ASTM D6110-10 for impact testing. The tensile test results were 24.71 MPa for sample A, 25.97 MPa for sample B, 26.00 MPa for sample C, and 20.73 MPa for sample D. The impact strength results were 0.02779 J/mm² for sample A, 0.02997 J/mm² for sample B, 0.03044 J/mm² for sample C, and 0.0306 J/mm² for sample D. The experiment showed that as the tensile test values increased, there was an effect on the impact strength results..
Karakterisasi Pasir Besi dan Sifat Magnetik Pantai Romantis Kabupaten Serdang Bedagai Khairunnisa, Umi Khairunnisa; Lubis, Ridwan Yusuf; Jumiati, Ety
SAINTIFIK Vol 10 No 2 (2024): Saintifik: Jurnal Matematika, Sains, dan Pembelajarannya
Publisher : Universitas Sulawesi Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31605/saintifik.v10i2.505

Abstract

Karakterisasi pasir besi dan sifat magnetik di Pantai Romantis merupakan bagian penting dari perlindungan lingkungan. Tujuan penelitian ini untuk mengetahui karakterisasi pasir besi dan Sifat Magnetik daerah Pantai Romantis Kabupaten Serdang Bedagai. Suhu yang diberikan pada treatment panas menggunakan oven pada suhu 500 oC dan 600 selama 3 jam dan treatment panas matahari yaitu dijemur di bawah sinar matahari selama 10 jam pada suhu cuaca sekitar 31oC selama 2 hari. Menggunakan X-ray fluorescence (XRF), Scanning electron microscopy (SEM). Menggunakan Origin dan Digimizer untuk menganalisis data pada pasir besi. Hasil analisis yang didapat bahwa pasir besi didominasi oleh besi oksida (Fe2O3) dengan persentase sekitar 75,18% menunjukkan bahwa treatment oven pada suhu yang lebih rendah memiliki kecenderungan untuk meningkatkan konsentrasi Fe2O3. Tingginya kandungan besi menandakan bahwa pasir besi memiliki potensi ekstraksi besi yang sangat signifikan, menjadi sumber bahan baku penting dalam industri logam. Pada suhu 600°C komposisi mineral pasir besi relatif stabil, meskipun terjadi variasi kecil pada beberapa senyawa mineral akibat pemanasan.
PENGARUH NILAI KADAR AIR TERHADAP NILAI KALOR PADA BRIKET ARANG KULIT DURIAN Jumiati, Ety
EINSTEIN (e-Journal) Vol 7, No 3 (2019): EINSTEIN (e-Journal)
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/eins.v7i3.54688

Abstract

Briket arang merupakan bongkahan arang yang dapat dijadikan bahan bakar alternatif. Tujuan penelitian yaitu untuk mengetahui pengaruh nilai kadar air terhadap nilai kalor briket arang kulit durian. Penelitian ini menggunakan bahan kulit durian dan tepung tapioka sebagai perikat dengan variasi  komposisi yaitu sampel A (70% : 30%), sampel B (65% : 55%), dan sampel C (60% : 40%). Parameter uji yaitu uji nilai kadar air dan uji nilai kalor. Hasil pengujian briket arang kulit durian menghasilkan nilai kadar air senilai 0,969-1,055%, dan nilai kalor senilai 21,659-37,986 cal/g yang telah memenuhi standar mutu briket Indonesia sehingga briket arang yang diperoleh ini dapat dimanfaatkan dan dipakai dalam kehidupan sehari-hari.
ANALISIS SIFAT FISIS BATAKO MENGGUNAKAN BUBUR KERTAS SEBAGAI AGREGAT Jumiati, Ety
EINSTEIN (e-Journal) Vol 9, No 1 (2021): EINSTEIN (e-Journal)
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/eins.v9i1.54692

Abstract

Telah dilakukan pembuatan batako konvensional dari bahan bubur kertas. Penelitian ini bertujuan untuk menganalisis sifat fisis batako menggunakan bubur kertas  sebagai agregat. Variasi  komposisi semen : pasir : bubur kertas antara lain: sampel A (10% : 30% : 60%), sampel B (20% : 30% : 50%) dan sampel C (30% : 30% : 40%), dengan waktu pengeringan yaitu selama 28 hari. Parameter pengujian fisis yang dilakukan yaitu densitas dan penyerapan air. Dari hasil pengujian menunjukkan bahwa batako menggunakan bubur kertas yang optimal yaitu pada sampel C yang menghasilkan nilai densitas sebesar 1,055 g/cm3 dan penyerapan air sebesar 21,659 %, dimana pada pengujian penyerapan air sudah memenuhi persyaratan mutu SNI 03- 0349-1989.
Peningkatan Kualitas Air Minum Bersumber dari Air Sumur Bor dengan Metode Filtrasi Jumiati, Ety; Tambunan, Efrida Pima Sari
Navigation Physics : Journal of Physics Education Vol 6, No 1 (2024): Navigation Physics : Journal of Physics Education Vol. 6 No. 1 Tahun 2024
Publisher : UNIVERSITAS INDRAPRASTA PGRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30998/npjpe.v6i1.2600

Abstract

Drinking water is a very important need for the body. Drinking water can be treated from borehole water sources which are not necessarily free from harmful chemical and microbiological substances such as pH and manganese. The aim of this research is to improve the quality of drinking water from Borehole water. The filter media used is treated natural zeolite type TNZ RC. 42, Activated carbon granular cartridge, and 1 and 3 µm Melt Blown Filter Cartridge. The testing parameter is chemical test (pH and Mn) and microbiology test (total coliform). The increment in pH levels from the research data were obtained sample A of 7,01, sample B of 7,08, sample C of 7,05 and sample D of 7,24, while the decrease in Mn levels from the research data were obtained sample A of 0,387 mg/L, sample B of 0,429 mg/L, sample C of 0,442 mg/L and sample D of 0,501 mg/L. In total coliform sample A, B, C and D of 0 CFU/100 mL, whose value may not exceed the maximum allowed standard of PERMENKES RI No.492/MENKES/PER/IV/2010.
Refinement of cooking oil using activated carbon from coconut shell and zeolite Jumiati, Ety
Jurnal Teknosains Vol 13, No 2 (2024): June
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.91766

Abstract

Bulk cooking oil is obtained from traditional markets and and relatively has a characteristic color that tends to be brownish and unclear; cooking oil has been repeatedly used after frying, resulting in physical changes such as darkening, thickening, and foaming. If bulk cooking oil is repeatedly used for frying, it can be detrimental to health as it may accumulate saturated fatty acids in the oil. This condition prompted the search for solutions to purify bulk cooking oil and use cooking oil using processed zeolite and coconut shell-activated carbon as adsorbents to improve the quality of cooking oil. This research utilizes an experimental-quantitative method. Variations in composition include sample A (bulk cooking oil: 75% and processed natural zeolite: 25%), sample B (bulk cooking oil: 75% and coconut shell activated carbon: 25%), sample C (used cooking oil: 75% and processed natural zeolite: 25%), and sample D (used cooking oil: 75% and coconut shell activated carbon: 25%). The research results on the quality of coconut shell activated carbon obtain moisture content of 13.2%, ash content of 2.1%, volatile matter content of 17.9%, and carbon content of 80.0%, which meets the SNI 06-3730-1995 standard. Meanwhile, the quality results of cooking oil after the purification process obtain moisture content values of 0.09-0.10%, free fatty acid values of 0.14-0.30%, and normal color that does not exceed the maximum standard required by SNI 7709:2019 with a percentage reduction in moisture content of 0-60% and free fatty acids of 0-63.41%.
Aktivasi Peran Mahasiswa KKN UINSU 125 dalam Peningkatan Pendidikan dan Kesehatan di Desa Sibolangit Srg, Dini Anggraini; Nurfebia, Karina; Pratama, Dimas; Mughiroh, Hafizul; Jumiati, Ety
Mimbar Kampus: Jurnal Pendidikan dan Agama Islam Vol 23 No 1 (2024): Mimbar Kampus: Jurnal Pendidikan dan Agama Islam
Publisher : Fakultas Tarbiyah IAI Nasional Laa Roiba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47467/mk.v23i1.5039

Abstract

Sibolangit Village is one of the tourist villages in North Sumatra, this village is located in the Deli Serdang Regency, North Sumatra Province. Limitations in education in terms of accessing the latest learning information create quite a difficult challenge for several schools in Sibolangit Village. The health of the elderly is also of particular concern there. The method for implementing Real Work Lecture (KKN) activities for students at the State Islamic University of North Sumatra to the community consists of work programs JBT (Additional Study Hours), JBM (Evening Study Hours), JBP (Companion Study Hours), Koran Learning, elderly health and stunting counseling . All programs carried out have gone well which can be seen from the enthusiasm of students in participating in all the programs that have been made. in participating in all the programs that have been made and the same is the case with the elderly who regularly take part in gymnastic activities and mothers and children who take part in posyandu and counseling.
Co-Authors ., Masthura Abdul Halim Daulay Ananda, Putri Dwi Br Lubis, Lailatul Husna Dimas Pratama, Dimas Hutauruk, Siti Aulia Khairunnisa, Umi Khairunnisa Lubis, Fadilah Azzahra Lubis, Ridwan Yusuf Miftahul Husnah Mughiroh, Hafizul Nabilah, Cinthia Farah Nasution, Annisa Salsha Safira Nasution, Annisa Wulan Dhari Nasution, Nazaruddin Nurfebia, Karina Pratiwi, Pebi Ajeng Rani Saputri Ratni Sirait, Ratni Sariah, Jati Nur Siti Putri Masyitah Srg, Dini Anggraini Sulkha, Amalia Tambunan, Efrida Pima Sari Umairoh, Ninda