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All Journal Biology, Medicine, & Natural Product Chemistry KOVALEN: Jurnal Riset Kimia Jurnal Penelitian Sains Indonesian Journal of Pure and Applied Chemistry Jurnal Kartika Kimia CHEDS: Journal of Chemistry, Education, and Science Jurna Beta Kimia
Susvira, Dian
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Physics Public Health

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Skrining Fitokimia dan Aktivitas Antioksidan Ekstrak Metanol Biji Buah Pare (Momordica charantia L.) Sriwijayanti, Sriwijayanti; Situmeang, Boima; Yulianti, Nani; Susvira, Dian; Widiyanto, Holisha
Jurnal Beta Kimia Vol 4 No 1 (2024): Volume 4, Nomor 1: Mei 2024
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/jbk.v4i1.15487

Abstract

Antioksidan merupakan senyawa yang dapat merangkat radikal bebas. Salah satu tanaman yang diduga dapat merangkat senyawa radikal bebas adalah biji buah pare (Momordica charantia L.). Masyarakat telah menggunakan pare sebagai makanan sehari-hari dan juga telah lama dipercaya sebagai obat tradisional untuk mengobati berbagai macam penyakit. Tujuan dari penelitian ini adalah uji skrining fitokimia dan uji aktivitas antioksidan ekstrak metanol biji buah pare. Ekstraksi dilakukan dengan menggunakan metode maserasi. Uji skrining fitokimia dilakukan dengan menggunakan berbagai reagent kimia untuk analisis senyawa golongan alkaloid, fenoli, flavonoid, tannin, triterpenoid dan steroid. Uji Aktivitas antioksidan dengan menggunakan metode DPPH. Hasil uji skrining fitokimia didapatkan bahwa ekstrak metanol biji buah pare positif mengandung senyawa golongan alkaloid, flavonoid, fenolik, triterpenoid, steroid dan tanin. Hasil uji aktivitas antioksidan didapatkan nilai IC50 sebesar 137,99 ppm yang termasuk dalam kategori sedang.
Synthesis of Biodiesel from Waste Cooking Oil Using Heterogeneous Catalyst (CaO) Based on Duck Eggshell with Transesterification Reaction Susvira, Dian; Hartono, Rudi; Fauzantoro, R. A.
Jurnal Kartika Kimia Vol 5 No 1 (2022): Jurnal Kartika Kimia
Publisher : Department of Chemistry, Faculty of Sciences and Informatics, University of Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26874/jkk.v5i1.122

Abstract

Biodiesel is produced from esterification and transesterification reactions of various vegetable oils such as coconut oil, palm oil, seed oil, soybean oil, etc. Waste cooking oil has the potential as a raw material for making biodiesel due to its abundant availability. The use of the CaO catalyst from duck eggshells can increase biodiesel quality. This study aimed to obtain the best catalyst with a high yield in biodiesel production using the transesterification method. The initial stage begins with activating the impregnated duck eggshell catalyst with various concentrations of KOH in distilled water (10 g KOH/100 mL, 15 g KOH/100 mL, 20 g KOH/100 mL, and 25 g KOH/100 mL). Followed by biodiesel synthesis steps using temperature variations in transesterification (45˚C, 55˚C, and 65˚C) in reaction times of 1, 2 and 3 hours using 2% catalyst concentration to the amount of waste cooking oil and a molar ratio of methanol: oil (7:1). The experimental results showed that transesterification of waste cooking oil could be improved with the presence of a CaO heterogeneous catalyst. The values of density, Free Fatty Acid (FFA), viscosity, and the acid number obtained was adjusted to the parameters using SNI:7182:2015. Only the total ester parameter (96.02%) and the cetane number (40.4) did not meet the requirements. Keywords: biodiesel, duck eggshell, waste cooking oil
Efektivitas Perendaman Larutan Nanas Queen Victoria sebagai Pereduksi Logam Fe pada Kerang Hijau (Perna viridis) Widiyanto, Holisha; Julianti, Julianti; Sriwijayanti, Sriwijayanti; Sari, Puspita; Situmeang, Boima; Susvira, Dian
Jurnal Beta Kimia Vol 4 No 2 (2024): Volume 4, Nomor 2: November 2024
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/jbk.v4i2.18673

Abstract

Excessive Fe heavy metal contamination cause health problems for humans. One of the marine biota that is susceptible to heavy metal contamination is green mussels. Green mussels (Perna viridis) are a food that is very often consumed by humans. This Fe metal which derived with materials that are chelating agents such as citric acid, one of the fruits that contain citric acid is the Queen Victoria pineapple. The research aims to determine the effectiveness of soaking Queen Victoria pineapple solution in reduces Fe metal in green mussels. The pineapple solution immersion test was carried out with varying concentrations of 25, 50 and 75% with soaking times of 15, 30 and 45 minutes which were analyzed using inductively coupled plasma (ICP). The highest reduction results were at a concentration of 25% with a soaking time of 30 minutes, amounting to 60.58%.
Pemanfaatan Ekstrak Kulit Batang Kesambi (Schleichera oleosa) dalam Sintesis dan Karakterisasi Nanopartikel Perak dengan FTIR Susvira, Dian; Akbar, Muhammad; Situmeang, Boima; Widiyanto, Holisha
CHEDS: Journal of Chemistry, Education, and Science Vol 9, No 1 (2025)
Publisher : Universitas Islam Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30743/cheds.v9i1.11263

Abstract

Penelitian ini bertujuan untuk mensintesis dan mengkarakterisasi nanopartikel perak menggunakan ekstrak kulit kayu kesambi serta menentukan gugus fungsi dalam ekstrak yang berperan sebagai bioreduktor. Ekstraksi kulit kayu kesambi dilakukan dengan metode maserasi menggunakan pelarut etanol. Pembentukan nanopartikel perak dilakukan dengan menambahkan ekstrak kulit kayu kesambi 4% ke dalam larutan AgNO₃ 0,01 M. Nanopartikel disintesis dengan tiga perbandingan yang berbeda, yaitu: 1:3, 1:5, dan 1:7. Analisis instrumental menggunakan Spektrofotometer dan FTIR. Absorbansi maksimum dari analisis spektrofotometer UV-Vis untuk sampel dengan perbandingan 1:3, 1:5, dan 1:7 diamati pada panjang gelombang 440 nm. Nilai absorbansi tertinggi diperoleh pada perbandingan 1:3. Spektrum FTIR nanopartikel yang berasal dari ekstrak kulit kayu kesambi menunjukkan puncak yang lebar dan kuat pada bilangan gelombang 3385 cm⁻¹, yang menunjukkan adanya vibrasi peregangan OH pada senyawa fenolik, yang berfungsi sebagai agen pereduksi dalam sintesis nanopartikel perak.
Analysis of Total Polyhenolic Content and Antioxidant Activity from n-hexane, Ethyl acetate and Ethanol Extract of Kitolod (Hipobbroma longiflora) Leaf Situmeang, Boima; Faradin, Faradin; Susvira, Dian; Bialangi, Nurhayati; Widiyanto, Holisha; Yulianti, Nani; Jinanti, Nazwa
Jurnal Penelitian Sains Vol 27, No 2 (2025)
Publisher : Faculty of Mathtmatics and Natural Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56064/jps.v27i2.1182

Abstract

Isotoma longiflora, commonly known as Kitolod, has been traditionally used as a medicinal plant for treating various ailments. This study aims to extract Kitolod leaves using three different solvents with varying polarities: n-hexane (non-polar), ethyl acetate (semi-polar), and ethanol (polar). The total phenolic content, total flavonoid content, and antioxidant activity were analyzed using a spectrophotometer. The trends observed in both TFC and TPC results indicate that ethyl acetate is the most effective solvent for extracting bioactive compounds from Kitolod leaves. The ethyl acetate extract of Kitolod leaves exhibited the highest antioxidant activity (150.542 ± 3.917 ppm), followed by the ethanol (157.235±0.858 ppm) and n-hexane (217.345 ± 1.749 ppm) extracts. This suggests that ethyl acetate is the most effective solvent for extracting bioactive compounds with antioxidant properties from Kitolod leaves.
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.
PENGARUH PENAMBAHAN KOAGULAN BIJI KELOR TERHADAP PENURUNAN KADAR LOGAM KROMIUM (Cr), MANGAN (Mn), DAN TIMBAL (Pb) MENGGUNAKAN ICP-OES (THE ADDITION EFFECT OF KELOR SEEDS COAGULANT ON THE DECREASING OF CHROMIUM (Cr), MANGANESE (Mn), AND LEAD (Pb) LEVELS USING ICP-OES) Susvira, Dian; Ramadhan, Muhammad Bagus; Susparini, Ninik Triayu; Situmeang, Boima; Widiyanto, Holisha; Bialangi, Nurhayati; Musa, Weny JA
Indonesian Journal of Pure and Applied Chemistry Vol 7, No 1 (2024)
Publisher : Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/indonesian.v7i1.63599

Abstract

Electroplating process has a negative effect in form metal ions waste. Today, industrial wastewater treatment widely using aluminum sulfate or alum as synthetic coagulants, although hazardous and expensive. This study was conducted to discover the activity of Moringa seeds (Moringa oleifera) as natural coagulants to substitute synthetic coagulants. Trapped metal ions detected by ICP-OES. The results showed that moringa seed coagulants could reduce 53% Cr, 64.56% Mn, and 92.89% Pb in the addition of 15 grams of moringa seed coagulants.
Antioxidant and Antibacterial Properties of Methanol Extract of Gletang Flower (Tridax procumbens) Situmeang, Boima; Musa, Weny JA; Bialangi, Nurhayati; Sriwijayanti, Sriwijayanti; Widiyanto, Holisha; Susvira, Dian
Biology, Medicine, & Natural Product Chemistry Vol 14, No 2 (2025)
Publisher : Sunan Kalijaga State Islamic University & Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14421/biomedich.2025.142.1085-1090

Abstract

In a previous study, the methanol extract of Tridax procumbens flowers (commonly known as gletang) at high concentrations was reported to exhibit strong antibacterial activity against Streptococcus mutans and Enterococcus faecalis. This study aimed to examine the secondary metabolite content, antioxidant activity, and antibacterial activity of the methanol extract of gletang flowers. The antioxidant activity was evaluated using two methods, namely DPPH and ABTS assays. The antibacterial activity was assessed using the Kirby-Bauer method at concentrations of 1000, 5000, and 10000 ppm against Staphylococcus aureus, Escherichia coli, Streptococcus mutans, and Enterococcus faecalis. Phytochemical screening revealed that the methanol extract of gletang flowers contains phenolic compounds, flavonoids, alkaloids, and triterpenoids. The antioxidant activity tests showed very strong activity in both DPPH and ABTS assays, with IC50 values of 6.8478 ± 1.335 and 12.8608 ± 0.579 ppm, respectively. The antibacterial activity tests showed that the methanol extract of gletang flowers exhibited strong activity against E. faecalis at concentrations of 5000 and 10000 ppm, with inhibition zone diameters of 3.00 ± 0.14 and 3.20 ± 0.14 mm, respectively.
Analysis of the Biogas Potential of Organic Waste from Keranggot Market and Household Waste in Cilegon City Susvira, Dian; Widiyanto, Holisha; Sagala, Iman; Situmeang, Boima
Jurnal Kartika Kimia Vol 8 No 2 (2025): Jurnal Kartika Kimia (In Progress)
Publisher : Department of Chemistry, Faculty of Sciences and Informatics, University of Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26874/jkk.v8i2.979

Abstract

Organic waste from traditional markets and households represents a significant environmental challenge but also offers potential as a renewable energy source through biogas production. This study aimed to evaluate the chemical composition and gas production potential of organic waste collected from Keranggot Market and household sources in Cilegon City. Proximate analysis was conducted to determine pH, moisture content, crude fiber, fat, carbohydrate, and protein levels, while total organic carbon (TOC) was measured using the dry combustion method. Gas composition (N₂, O₂, H₂, CH₄, and CO₂) was analyzed by gas chromatography after storage in drum containers for one and two weeks. The results showed that the waste samples had an acidic pH (5.18), high moisture content (3.00%), high crude fiber content (55.01%), moderate fat (6.76%) and protein levels (5.56%), and a total organic carbon content of 19.11%. The calculated C/N ratio was approximately 21.5, which falls within the optimal range for anaerobic digestion. Gas analysis revealed the presence of methane (1.10%) and carbon dioxide (6.71%) after two weeks of storage, confirming the onset of anaerobic decomposition. These findings suggest that organic waste from Keranggot Market and household sources in Cilegon City has potential as a feedstock for biogas production, although pretreatment may be required to overcome the high lignocellulosic content.
Co-Authors Asad, Hafidz Al Boima Ramses Situmeang Faradin, Faradin Fauzantoro, R. A. Hartono, Rudi Jinanti, Nazwa Julianti Julianti, Julianti Muhammad Akbar Nani Yulianti Ninik Triayu Susparini, Ninik Triayu Nurhayati Bialangi Puspita Sari Ramadhan, Muhammad Bagus Sagala, Iman Situmeang, Boima Sriwijayanti Sriwijayanti, Sriwijayanti Widiyanto, Holisha