Article Per Year (5 Year)
p-Index From 2020 - 2025
0.61
P-Index
This Author published in this journals
All Journal CIRCUIT: Jurnal Ilmiah Pendidikan Teknik Elektro Jurnal Penelitian Pendidikan IPA (JPPIPA) Abdimas Talenta : Jurnal Pengabdian Kepada Masyarakat IJOEP : International Journal of Ecophysiology Jurnal Riset Rumpun Ilmu Tanaman Majalah Ilmiah METHODA
Sri Pratiwi Aritonang
Universitas Methodist Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Medicine & Pharmacology Physics Public Health Social Sciences Other

Published : 6 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 6 Documents
Search

 1 
Optimalisasi Metode Electroplatting Koagulasi Terhadap Penurunan Kadar Logam Zinkum (Zn) Pada Air Buangan Limbah Industri Pengolahan Karet Muhammad Ridwan Harahap; Abdul Chalik Nasution; Sri Pratiwi Aritonang
CIRCUIT: Jurnal Ilmiah Pendidikan Teknik Elektro Vol 1, No 1 (2015)
Publisher : PTE FTK UIN Ar-Raniry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/crc.v1i1.312

Abstract

Penelitian tentang penggunaan metode electroplatting koagulasi untuk menurunkan konsentrasi logam Zn dalam air limbah industri karet telah dilakukan. Limbah yang digunakan memiliki karakteristik kontaminan Zn 1.2771 mg/L. Percobaan dilakukan dengan tegangan listrik 12 Volt, kuat arus 10 A, variasi waktu 0, 15, 30, 45, sampai 60 menit, variasi pH limbah 4, 7,dan 8, karakteristik plat elektroda dengan panjang 10 cm, lebar 2 cm dan ketebalan 0,5 mm, serta volume sampel sebanyak 1 liter dalam keadaan statis. Analisis Zn pada hasil akhir digunakan Spektrofotometer Serapan Atom (SSA). Hasil penelitian menunjukkan penurunan konsentrasi logam Zn pada pH 7 dengan waktu kontak 60 menit, yakni sebesar 99,56 %. Kata Kunci: electroplatting, koagulasi, zinkum, limbah, industri karet.
THE EFFECT OF VERMICOMPOST ON THE GROWTH OF SOYBEAN (Glycine max L.) Sri Pratiwi Aritonang
International Journal of Ecophysiology Vol. 2 No. 1 (2020): International Journal of Ecophysiology
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (474.013 KB) | DOI: 10.32734/ijoep.v2i1.3984

Abstract

The growth and production of soybean (Glycine max L) fertilized by vermicompost was conducted. The vermicompost used consisted of 4 levels, namely: K0 = no vermicompost, K1 = 60 g, K2 = 90 g and K3 = 120 g, each treatment was replicate 3 times. The results showed that the dose of vermicompost significantly affected to the number of branches, number of pods and seed weight, however the organic vertilizer not significantly affected on plant height, flowering age, number of empty pods and seeds dry weight. The interaction dose of vermicompost has no significant effect on plant height, number of branches, flowering age, number of pods, number of filled pods, number of seed and 100 seeds dry weight.
ANALISIS KANDUNGAN ANTIOKSIDAN DAN MINERAL KALSIUM (Ca), KALIUM (K), DAN BESI (Fe) DARI EKSTRAK BUAH JAMBU AIR (Syzygium samarangense) VARIETAS MADU DELI HIJAU (MDH) Sri Pratiwi Aritonang
Majalah Ilmiah METHODA Vol. 8 No. 1 (2018): Majalah Ilmiah METHODA
Publisher : Universitas Methodist Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46880/methoda.Vol8No1.pp62-68

Abstract

It has been done research on the antioxidant activity assay from ethyl acetate extracts of guava fruits varieties green deli honey against free radical DPPH (1,1-Diphenyl-2-Picrylhdrazyl) and The mineral content such as Calcium (Ca), Potassium (K), and Iron (Fe) by visible spectrophotometric visible at 516.5 nm wavelength. As a comparison used antioxidant vitamin C (positive control). The guava fruits were extracted by soxhletation using ethyl acetate solvent for 24 hours while for the test of secondary metabolite compound with phytochemical screening. The extracts contain phenol compound group of flavonoida. Antioxidant capability was measured as a decrease in absorbance DPPH solution addition of guava extract. From the results of research showed that antioxidant ethyl acetate extract from guava fruits has IC50 of 446, 7173 mg / L, vitamin C has IC50 2,6583 mg / L. The largest mineral content from guava fruits were Iron (Fe) 6,4892 mg / Kg, Calcium (Ca) 5,6430 mg / Kg, and Potassium (K) 3,2466 mg / Kg.
Effects of Planting Distances and Organic Fertilizer Concentrations on Growth and Yield of Red Onion Plants (Allium ascalonicum L.) Lince Romauli Panataria; Sri Pratiwi Aritonang; Efbertias Sitorus; Meylin Kristina Saragih
Jurnal Riset Rumpun Ilmu Tanaman Vol. 4 No. 1 (2025): April : Jurnal Riset Rumpun Ilmu Tanaman
Publisher : Pusat riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jurrit.v4i1.4446

Abstract

This study aims to determine the effect of planting distance and concentration of liquid organic fertilizer on the growth and production of shallots (Allium ascalonicum L.). This study used a Randomized Block Design (RAK) with two treatment factors: planting distance and concentration of liquid organic fertilizer. The treatment factors are as follows: Factor I: Planting Distance (J) consists of 3 treatment levels: J1 = 15 cm x 15 cm; J2 = 20 cm x 20 cm, and J3 = 25 cm x 25 cm. Factor II: Concentration of liquid organic fertilizer (V) consists of 4 treatment levels, namely: V1 = 2 ml / 240 ml of water; V2 = 4 ml / 240 ml of water; V3 = 6 ml / 240 ml of water and V4 = 8 ml / 240 ml of water. Data analysis was done using variance analysis and Duncan’s test. The results showed that planting distance significantly affected the number of leaves, bulb diameter per sample, and fresh bulb weight per sample but had no significant effect on flowering age. POC concentration significantly affected flowering age, tuber diameter per sample, and fresh tuber weight per sample but did not significantly affect plant height and number of leaves. The interaction between planting distance and POC concentration did not significantly affect all observed parameters.
Appplication of Biochar and Rice Husk Ash to sulfur Absorption, Growth and Production of Shallots Plant (Allium ascalonicum L.) Aritonang, Sri Pratiwi; Sianipar, Ebsan Marihot; Sitorus, Efbertias; Sianturi, Pahala LL
Jurnal Penelitian Pendidikan IPA Vol 11 No 6 (2025): June
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i6.11115

Abstract

Soil fertility decline and sulfur deficiency are major constraints in shallot (Allium ascalonicum L.) cultivation, especially in sandy soils with low cation exchange capacity. Biochar and rice husk ash are potential soil amendments known to improve soil structure, nutrient availability, and crop productivity. This study aimed to determine the effect of rice husk biochar and rice husk ash on the growth, yield, and sulfur uptake of shallots. A factorial experiment was conducted using a Randomized Group Design (RGD) with two factors: biochar and rice husk ash, each at three dose levels. Results showed that biochar application improved the number of leaves, number of tillers, and bulb weight per unit, while rice husk ash had a limited effect, mainly enhancing leaf number at early growth. No significant interaction between the two amendments was observed across measured parameters, including sulfur uptake. These findings suggest that biochar contributes more effectively to shallot growth and yield than rice husk ash under the tested conditions. Further studies are recommended to optimize the combined use of organic amendments and to explore their long-term effects on soil nutrient dynamics and crop performance.
AIR QUALITY MONITORING OF KALABAHI-ALOR’S SEAPORT-EAST OF NUSA TENGGARA Rikson Siburian; Minsyahril Bukit; Herlince Sihotang; Saur Lumban Raja; Minto Supeno; Cristina Simanjuntak; Nurhaida Pasaribu; Sri Pratiwi Aritonang
ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat Vol. 3 No. 2 (2018): ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (639.517 KB) | DOI: 10.32734/abdimastalenta.v3i2.2641

Abstract

Evaluation of environment of seaport is needed as well as our responsibility to nature sustainability. The Alor’s seaport belongs to Pelindo III. In order to know the air quality of Alor’s seaport, we did this study. Our aims are to know level quality of air at Alor’s seaport and compare to the government regulation. This study refers to Pararosaniline (SOx), Saltzman (NOx), Particle Calculation (dust) and decibel (noisy) methods. We used four locations, those are A-1 (Entrance gate of PELINDO (8013’09.12”S, 124031’07.21”E)); A-2 (In front of passengers terminal (8013’08.75”S, 124031’01.60”E)); A-3 (Exit gate Kalabahi’s seaport (8013’08.2”S, 124031’00.87”E)) and A-4 (In front of port of the people (8011’09.12”S, 124031’07.21”E)). Results show that the averages level of SOx, NOx and dust of A-1, A-2 and A-3 are 103.01, 104.65 and 107.47 (µg/Nm3), 37.87, 30.62, and 39.73 (µg/Nm3), 56.64, 47.47 and 50.72 (µg/Nm), respectively. On the other hand, the level of noisy of A-1, A-2, A-3 and A-4 are 68.76, 65.69, 65.20 and 73.60 (dBA), respectively. Base on all of data, we conclude that the air quality of Alor’s seaport is still appropriate according to government regulation (PP. No. 4, 1999).
Co-Authors Abdul Chalik Nasution Cristina Simanjuntak Ebsan Marihot Sianipar Efbertias Sitorus Herlince Sihotang Lince Romauli Panataria Meylin Kristina Saragih Minsyahril Bukit Minto Supeno Muhammad Ridwan Harahap Nurhaida Pasaribu Rikson Siburian Saur Lumban Raja Sianturi, Pahala LL