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All Journal KOVALEN: Jurnal Riset Kimia SPIN: Jurnal Kimia & Pendidikan Kimia Al-ATHFAL: Jurnal Pendidikan Anak AL-ATHFAL: Jurnal Pendidikan Anak
Sriwijayanti
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Chemical Engineering, Chemistry & Bioengineering Chemistry Education

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ETHANOL EXTRACT OF MATOA (Pometia pinnata) AS NATURAL ANTIOXIDANT TO INHIBIT OXIDATION REACTION OF CRUDE PALM OIL: EKSTRAK ETANOL DAUN MATOA (Pometia pinnata) SEBAGAI ANTIOKSIDAN ALAMI UNTUK MENGHAMBAT REAKSI OKSIDASI PADA CRUDE PALM OIL Sriwijayanti; Hidayatullah, Ryan; Musa, Weny JA; Bialangi, Nurhayati; Situmeang, Boima; Widiyanto, Holisha; Lailatussholihah, Isna
SPIN JURNAL KIMIA & PENDIDIKAN KIMIA Vol. 6 No. 1 (2024): Januari - Juni 2024
Publisher : UIN Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20414/spin.v6i1.9797

Abstract

Indonesia is the 2nd largest country in the world in terms of palm oil production. The demand for Crude Palm Oil increases every year. For this reason, Indonesia is expected to be able to compete at the international industry level in producing palm oil, with the aim of being able to produce good quality palm oil among industries in other countries. The problem that often occurs in CPO factories is a decrease in the quality of CPO caused by an increase in Free Fatty Acid (FFA) levels and Peroxide Numbers. Antioxidants are substances that can delay or prevent the occurrence of free radical anti-oxidation reactions in the oxidation of fats or oils. Natural antioxidants are antioxidants that are obtained directly from nature. Natural antioxidants are antioxidants that are obtained directly from nature. One of them is the leaf of the matoa plant (Pometia pinnata). Based on the results of this study, the antioxidants of the ethanol extract of the matoa plant can reduce levels of FFA and peroxide numbers depending on the length of time the antioxidant mixture is given to CPO. In this study, a decrease in FFA levels and peroxide numbers was obtained from samples on day - 10 with the addition of 5000 ppm antioxidants, namely 2.71%. while the peroxide number is 0.83%.
UPAYA MENINGKATKAN KEMAMPUAN KOGNITIF ANAK KELOMPOK B MELALUI PERMAINAN DADU DANCE DAN BOLA BLAST DI RA TARBIYATUL IHSAN LEMAH KEMBAR Sriwijayanti; Eka Dheasari, Agustiarini
Al-ATHFAL: Jurnal Pendidikan Anak Vol. 5 No. 1 (2024): Juli
Publisher : LPPM STAI Muhammadiyah Probolinggo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46773/alathfal.v5i1.958

Abstract

The low cognitive abilities of children at RA Tarbiyatul Ihsan regarding color recognition are indicated by their inability to group colors and match objects according to color, count/number and show number symbols. This is caused by the lack of interest in the media used by teachers in learning. Therefore, researchers intend to improve children's cognitive abilities through the game Dice Dance and Bola Blast in group B RA Tarbiyatul Ihsan Sumberasih. This research used the Class Action Research (PTK) method which was conducted on group B, totaling 15 students in the first semester of the 2023-2024 academic year. This research was conducted from December 2023 to January 2024. Data collection techniques used tests, interviews and observation. Done in 2 cycles. Each cycle is held in 3 meetings. This research was preceded by a pre-cycle, with a percentage of 32%, cycle I experienced an increase with a percentage of 52% and cycle II experienced an increase of 78.66%. It was concluded based on research that the Dice Dance and Ball Blast games can improve the cognitive abilities of group B children to improve children's development in recognizing colors, grouping and matching objects according to color, counting/counting and showing number symbols. Therefore, this game is suitable for educators to use to help children's cognitive development. Keywords: Cognitive Enhancement, Game Media, Dance Dice and Blast Ball
Penurunan Logam Fe dan Co Pada Kerang Hijau (Perna viridis) dengan Metode Perendaman Larutan Belimbing Wuluh: Reduction Fe and Co Metals in Green Mussels (Perna viridis) by Soaking in Starfruit Solution Widiyanto, Holisha; Asad, Hafidz Al; Sriwijayanti; Susvira, Dian; Situmeang, Boima
KOVALEN: Jurnal Riset Kimia Vol. 9 No. 3 (2023): 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.2023.v9.i3.16586

Abstract

Green mussels with the Latin name Perna viridis are an animal that lives in the ocean and is a type of shellfish that is widely consumed by the public. Along with time, the emergence of factories that can pollute the oceans can cause contamination of marine life in it, one of the pollutants is the heavy metals of Fe and Co. The accumulation of heavy metals Fe and Co in green mussels can be toxic to people who consume them. This study aims to determine the concentration of heavy metals Fe and Co in green mussels before and after immersion in starfruit solution. Tests for immersion of the starfruit solution were carried out at 15, 30, and 45 minutes, then the destruction results were analyzed using inductively coupled plasma (ICP) with the calibration curve method. The Fe content in the green mussel sample before treatment was 2.946 mg/kg and the Co content in the green mussel sample before treatment was 2.6081 mg/kg. After soaking in starfruit solution for 15, 30, and 45 minutes, the Fe metal was 1.572 mg/kg, 1.275 mg/kg, and 1.035 mg/kg and the Co metal was 1.572 mg/kg, 1.275 mg/kg, and 0.683mg/kg. Research of immersing starfruit solution with soaking for 15, 30, and 45 minutes is effective in reducing levels of heavy metals Fe and Co in green mussels. The highest reduction was observed during a 45-minute immersion, with a decrease of 64.87% for Fe and 73.81% for Co, respectively.
Co-Authors Agustiarini Eka Dheasari Asad, Hafidz Al Hidayatullah, Ryan Lailatussholihah, Isna Nurhayati Bialangi Situmeang, Boima Susvira, Dian Widiyanto, Holisha