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Yunita Triana, Yunita
Institut Teknologi Kalimantan
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering Physics Public Health Social Sciences Other

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Journal : specta journal of technology

 1 
Studi Penambahan Inhibitor Organik Ekstrak Daun Bawang Tiwai (Eleutherine americana Merr.) pada Baja API 5L dalam Lingkungan 3,5% NaCl Triana, Yunita; Rinda, Sari Shaimah; Jatmoko, Awali; Sulitijono, Sulitijono
Specta Journal Vol 2 No 3 (2018): SPECTA Journal of Technology
Publisher : Specta Journal

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (720.448 KB) | DOI: 10.0610/specta.v2i3.11

Abstract

One that can be used as an organic inhibitor is bawang tiwai leaves extract. This study used 3.5% NaCl as corrosive media with inhibitor concentration of bawang tiwai leaves extract from 0 ppm to 500 ppm and immersion time from 10 days up to 30 days. The efficiency of inhibition was measured using a weight loss corrosion test, while the corrosion rate was obtained from polarization measurements. The FTIR test results show that the extract contains flavonoid compounds that act as antioxidants and inhibit corrosion. Inhibitory efficiency achieved up to 95.4545% for the addition of 300 ppm inhibitor and 20 days of immersion time. This inhibitory behavior is also supported by polarization measurements where the lowest corrosion rate of 0.00128 mm/year is obtained at the same concentration and immersion time.
Studi Penambahan Inhibitor Organik Ekstrak Daun Bawang Tiwai (Eleutherine americana Merr.) pada Baja API 5L dalam Lingkungan 3,5% NaCl Triana, Yunita; Rinda, Sari Shaimah; Jatmoko, Awali; Sulistijono, Sulistijono
SPECTA Journal of Technology Vol 2 No 3 (2018): SPECTA Journal of Technology
Publisher : LPPM ITK

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (720.448 KB) | DOI: 10.35718/specta.v2i3.11

Abstract

One that can be used as an organic inhibitor is bawang tiwai leaves extract. This study used 3.5% NaCl as corrosive media with inhibitor concentration of bawang tiwai leaves extract from 0 ppm to 500 ppm and immersion time from 10 days up to 30 days. The efficiency of inhibition was measured using a weight loss corrosion test, while the corrosion rate was obtained from polarization measurements. The FTIR test results show that the extract contains flavonoid compounds that act as antioxidants and inhibit corrosion. Inhibitory efficiency achieved up to 95.4545% for the addition of 300 ppm inhibitor and 20 days of immersion time. This inhibitory behavior is also supported by polarization measurements where the lowest corrosion rate of 0.00128 mm/year is obtained at the same concentration and immersion time.
Glucomanan Extract From Salak Seed (Salacca edulis Reinw.) As An Alternative Material of Making Hard Capsule Shell Yunita, Triana; Rizky, Dharmawan Yudha; Rahajeng, Utami Putri; Fredy, Kurniawan
SPECTA Journal of Technology Vol 2 No 1 (2018): SPECTA Journal of Technology
Publisher : LPPM ITK

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/specta.v2i1.93

Abstract

This research studied about making hard capsule shell using glucomannan extract from salak seed (Salacca edulis Reinw.). The glucomannan extracted by using etanol 96% and aqua dm. The glucomannan that had been extracted will became KGM polymer that will be used for casting the hard capsule shell using petri cup. The results obtained by smashing the seeds of salak to be smooth with meat grinder and glucomannan extraction using 2 methods with etanol 96% and isopropyl alcohol. After extracting the seeds of salak seeds, the bacon seed flour is weighed and taken some samples to obtain the best composition, resulting in a film layer on a thick capsule shell like a capsule shell in general. The result of the printing on the petri cup is still a thin layer that can not be taken, but this proves that glucomannan contained in the seeds of salak able to produce lapisal film capsule shells with the right composition.
Studi Penambahan Inhibitor Organik Ekstrak Daun Bawang Tiwai (Eleutherine americana Merr.) pada Baja API 5L dalam Lingkungan 3,5% NaCl Yunita Triana; Sari Shaimah Rinda; Awali Jatmoko; Sulistijono Sulistijono
SPECTA Journal of Technology Vol. 2 No. 3 (2018): SPECTA Journal of Technology
Publisher : LPPM ITK

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (720.448 KB) | DOI: 10.35718/specta.v2i3.11

Abstract

One that can be used as an organic inhibitor is bawang tiwai leaves extract. This study used 3.5% NaCl as corrosive media with inhibitor concentration of bawang tiwai leaves extract from 0 ppm to 500 ppm and immersion time from 10 days up to 30 days. The efficiency of inhibition was measured using a weight loss corrosion test, while the corrosion rate was obtained from polarization measurements. The FTIR test results show that the extract contains flavonoid compounds that act as antioxidants and inhibit corrosion. Inhibitory efficiency achieved up to 95.4545% for the addition of 300 ppm inhibitor and 20 days of immersion time. This inhibitory behavior is also supported by polarization measurements where the lowest corrosion rate of 0.00128 mm/year is obtained at the same concentration and immersion time.
Glucomanan Extract From Salak Seed (Salacca edulis Reinw.) As An Alternative Material of Making Hard Capsule Shell Triana Yunita; Dharmawan Yudha Rizky; Utami Putri Rahajeng; Kurniawan Fredy
SPECTA Journal of Technology Vol. 2 No. 1 (2018): SPECTA Journal of Technology
Publisher : LPPM ITK

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1230.723 KB) | DOI: 10.35718/specta.v2i1.93

Abstract

This research studied about making hard capsule shell using glucomannan extract from salak seed (Salacca edulis Reinw.). The glucomannan extracted by using etanol 96% and aqua dm. The glucomannan that had been extracted will became KGM polymer that will be used for casting the hard capsule shell using petri cup. The results obtained by smashing the seeds of salak to be smooth with meat grinder and glucomannan extraction using 2 methods with etanol 96% and isopropyl alcohol. After extracting the seeds of salak seeds, the bacon seed flour is weighed and taken some samples to obtain the best composition, resulting in a film layer on a thick capsule shell like a capsule shell in general. The result of the printing on the petri cup is still a thin layer that can not be taken, but this proves that glucomannan contained in the seeds of salak able to produce lapisal film capsule shells with the right composition.
Penambahan Ekstrak Ranting Karamunting (Rhodomyrtus Temenosa) Sebagai Inhibitor Alami Pada Baja AISI 1040 Yanti, Lisda; Darma, Daffa Irsyad; Rifani, Muhammad; Tajalla, Gusti Umindya Nur; Awali, Jatmoko; Mohd, Yusairie; Triana, Yunita
SPECTA Journal of Technology Vol. 7 No. 2 (2023): SPECTA Journal of Technology
Publisher : LPPM ITK

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/specta.v7i2.925

Abstract

  In this study, Karamunting twig extract (Rhodomystus tementosa) was used as a natural inhibitor on AISI 1040 steel. Based on the results of functional group analysis, it was confirmed that the compounds found in Karamunting twig extract are tannins and flavonoids. Electrochemical analysis using the potentiodynamic method showed the lowest corrosion rate at 300 ppm inhibitor concentration, with a corrosion rate of 2.881 mm/yr with an inhibition efficiency of 76.732%. Furthermore, the EIS test showed the highest inhibition efficiency at a concentration of 300 ppm, with a value of 66.720%.
Studi Pengaruh Temperatur Kalsinasi dalam Pembentukan Nanomagnetite dengan Metode Green Synthesis Ekstrak Daun Nanas Putra Parmita, Ade Wahyu Yusariarta; Panji; Dewanto, Hizkia Alpha; Sasongko, Ashadi; Qulub, Fitriyatul; Triana, Yunita; Parmita, Ade Wahyu Yusariarta Putra
SPECTA Journal of Technology Vol. 7 No. 2 (2023): SPECTA Journal of Technology
Publisher : LPPM ITK

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/specta.v7i2.940

Abstract

In synthesizing Fe3O4 nanoparticles using the green synthesis method by adding FeCl3.6H2O and pineapple leaf extract. Pineapple leaf extract is used as a natural reducing agent which contains hydroxyl and carbonyl, which acts as a reducing agent for the synthesized FeCl3.6H2O. Then after the precipitate is obtained, calcination will be carried out, where the calcination temperature in the synthesis becomes a factor in forming Fe3O4 nanoparticles. Different calcination temperatures of 400°C, 450°C, and 500°C were given to prepare Fe3O4 nanoparticles, with the XRD test results confirming that Fe3O4 nanoparticles were formed. In the SEM-EDX test, the optimum variation is 400°C because the average particle size is 150.23 nm with irregular particle shapes. Then proceed with the SAA results with a surface area of 60.125 m²/g. Nanomagnetite produced by green synthesis of pineapple leaf extract can be used as a removal dyes.
Co-Authors Ahmad Syaifuddin Ahmad Syaifuddin Ainun Zulfikar Al Habib, Irsyad Al-Shehan, Khulafaur Nawaf Ali, Shodikin Andromeda Ashadi Sasongko Asih Wentika Putri Kusuma Awali Jatmoko Azhary, Kartika Nerissa Batatta, Denada Yudhistira Darma, Daffa Irsyad Destiny, Keysi Devain Dewanto , Hizkia Alpha Dewanto, Hizkia Alpha Dharmawan Yudha Rizky Fadhilah, Hana’ Fitriyatul Qulub Fredy Kurniawan Fredy Kurniawan Fredy, Kurniawan Haliq, Ridhwan Hizam, Fadli Hizkia Alpha Dewanto Idhil Ismail, Andi Ika Ismail Ika Ismail Indrawati, Dini Irfan Riadin Ismail, Ika Jatmoko Awali Jatmoko Awali Jatmoko Awali Jatmoko Awali Jatmoko, Awali Jatmoko, Awali Kurniawan Fredy Laksono, Andromeda Dwi Leoriza, Meutya Dwi Lesmana, Muhammad Zidan Marippi, Alan Maulana, M. Arzil Miles, Austin Mohd, Yusairie Muhammad Akram Muhammad Rafli Muhammad Rifani, Muhammad Murni Handayani Muthia Putri Darsini Lubis Nabila, Najwa Olivier Aryatama Panji Pratama, Winardi Dian Wahyu Putra Parmita, Ade Wahyu Yusariarta Putra, Ade Wahyu Yusariarta Putri Ayu Tri Ashshofiah Rahajeng, Utami Putri Rinda, Sari Shaimah Rinda, Sari Shaimah Risky Setiani Putri Rizky Yoel Rizky, Dharmawan Yudha Rohimsyah, Fikan Mubarok Rudiyanto, Fahmi Rungsa, Yudianto Sarah Toding Sari Shaimah Rinda Sulistijono Sulistijono Sulistijono Sulistijono Sulistijono Sulistijono Sulitijono, Sulitijono Tajalla, Gusti Umindya Nur Tanjung, Rifqi Aulia Thesalonicha, Somalinggi Tri Paus Hasiholan Hutapea, Tri Paus Hasiholan Utami Putri Rahajeng Wentika Asih Yanti, Lisda Yosua Anjupaian Situmeang Yusuf, Chiara