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Stannum : Jurnal Sains dan Terapan Kimia
Published by Universitas Bangka Belitung
ISSN : 2714674X     EISSN : 27148173     DOI : https://doi.org/10.33019/jstk
Core Subject : Science, Engineering,
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering
Jurnal Sains dan Terapan Kimia published research article, minireview/review, and short communication that included studies in Inorganic Chemistry, Organic Chemistry, Analitycal Chemistry, Biochemistry, Physical Chemistry, Computational Chemistry, Chemical Engineering, and Applied Chemistry.
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 94 Documents
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Analysis of Flavonoid content and Toxicity Test of Semambu Rattan Leaf Ethanol Extract (Calamus scipionum lour)with Brine Shirmp Lethality Test (BSLT) method Legasari, Leni; Rahmadona, Shevira Putri; Yani, Dwi Fitri; Oktasari, Ade
Stannum : Jurnal Sains dan Terapan Kimia Vol 7 No 1 (2025): April 2025
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v7i1.5062

Abstract

Semambu rattan is rattan that grows wild in the forest areas of Indonesia, especially in southern Sumatra, Kalimantan, and Sulawesi. This study aims to determine the % yield, phytochemical tests, levels of flavonoids and cytotoxicity of the ethanol extract of rattan semambu leaves using the BSLT method with Artemia salina leach test larvae. The yield % yield contained 9.36%, the phytochemical test of the ethanol extract of the semambu rattan leaves contained secondary metabolites of flavonoids, alkaloids, tannins, saponins, and steroids. The test results for the levels of flavonoids at a concentration of 1000 ppm obtained a value of 53.307 μg/ml and the toxicity test of the ethanol extract of rattan semambu leaves obtained an LC₅₀ 130.390 ppm which was toxic
Chitosan preparation from white shrimp shell (Litopenaeus vannamei) for Fe(III) removal from Pontianak municipal groundwater Khairi, Syahrul; Wijoyo, Raden Bayu Trisno; Radhiansyah, Lalu Yayan; Belanisa, Tivani; Rezeki, Sri
Stannum : Jurnal Sains dan Terapan Kimia Vol 7 No 1 (2025): April 2025
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v7i1.5566

Abstract

White shrimp shell (Litopenaeus vannamei) is one of the biomaterial sources to obtain chitin. Chitin could undergo deacetylation process through hydrolysis in strong base solution to produce chitosan. This research aims to determine the potential of chitosan as an environmentally friendly adsorbent for the treatment of groundwater containing high iron ions in Pontianak. The research was conducted in two main stages; obtaining chitosan from the chitin of white shrimp shells, and treating municipal groundwater sample that is high in iron ions content. To obtain chitosan, raw biomaterial chitin from white shrimp shell has been prepared by demineralisation and deproteination process and followed by the deacetylation. The deacetylation of chitin was carried out through hydrolysis reaction in three variation concentrations of aqueous NaOH (i.e 30%, 50%, and 70%-b/v). The measurement of deacetylation degree of chitosan was determined by acid-base titration method and FTIR method. The chitosan with the highest degree of deacetylation was obtained from 70%-b/v NaOH which were 87.4% and 69.0% by acid-base titration method and FTIR, respectively. The chitosan then was utilized in groundwater treatment. The results showed that the chitosan can be utilized as an adsorbent in the pre-treatment process of groundwater in reducing the iron ion content. Almost 40% iron ion were successfully immobilized when 2% (b/v) adsorbent was applied. These results lead to a sustainability of water resources in Pontianak so that city groundwater can be used as an alternative water source for the community.
Utilization of Organic Waste into Immunity Protein Products and Its Application in Broiler Chicken Growth Bahri, Syaiful; Berghuis, Nila Tanyela; Ambarwati, Yuli; Sari, Revita; Nurfaradina, Zaskia Ayu
Stannum : Jurnal Sains dan Terapan Kimia Vol 7 No 1 (2025): April 2025
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v7i1.5678

Abstract

This research is related to utilizing organic liquid waste to be processed into immune protein. The processing stages include a mixture of organic liquid waste in the form of garbage leachate, Zingiberaceae, Crude Palm Oil, beef animal fat, and old coconut water. Mixing was carried out by making two immune protein products that differed in composition and function including protim 1 and protim 2 in knowing the success of the product from the observation of the weight of broilers at harvest. Giving protim 1 in drinking produced broiler weights up to 18 days of the age of 707, 697, and 634 grams. The weight of broilers obtained from the provision of protim 2 in drinking until the end of harvest was 2732, 2670, and 2458 grams. The use of both protims was successfully tested by comparing broilers that did not use protim until harvest, resulting in weights of 1749, 2238, and 2338 grams. FCR and IP values for three broilers consuming both protims resulted in values of 0.66 and 11.34, respectively, with physical characteristics that were slightly hairy compared to broilers that did not consume protim.
The The Application of Silver Nanoparticles Synthesized Using Moringa Leaf extract for the Detection Mercury (II) Metal Ions Siregar, Nonny Cristine; Yanti, Demi Dama; Ashari, Arif; Aji, Abdul; Indarto, Indarto
Stannum : Jurnal Sains dan Terapan Kimia Vol 7 No 1 (2025): April 2025
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v7i1.6276

Abstract

The increasing demand for clean water sources aligns with the continuous growth of the human population and environmental challenges. Water is a fundamental necessity for sustaining life, and its quality must be maintained to ensure safe utilization. However, contamination by heavy metals significantly degrades water quality, rendering it unsuitable for human consumption and daily use. Among various detection methods, silver nanoparticles (AgNPs) have emerged as promising nanomaterials for identifying the presence of heavy metal ions in water sources, including mercury (II) ions (Hg²⁺). The detection mechanism is based on colorimetric changes that can be further analyzed using UV-visible spectrophotometry. In this study, silver nanoparticles were successfully synthesized via a green synthesis approach using Moringa oleifera leaf extract as a bioreducing agent. The optimal synthesis conditions were established at a precursor concentration of 2.5 mM, a reaction temperature of 50°C, and a synthesis duration of 90 minutes. The resulting AgNPs exhibited an average particle size of 103.8 nm and demonstrated stability for up to three days. Furthermore, the synthesized AgNPs showed high sensitivity in detecting mercury (II) ions at concentrations as low as 20 ppm, highlighting their potential application in water quality monitoring and environmental remediation.
PENGARUH MASSA ADSORBEN KULIT KAKAO (Theobroma cacao L.) DAN pH DALAM PENURUNAN CHEMICAL OXYGEN DEMAND (COD) LIMBAH PALM OIL MILL EFFLUENT (POME) Akuri, Melan
Stannum : Jurnal Sains dan Terapan Kimia Vol 7 No 2 (2025): October 2025
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/6c0wd245

Abstract

Cocoa shell (Theobroma cacao L.) is a plant waste that has not been widely utilized. Cocoa husk contains cellulose, hemicellulose, lignin, fat and crude fiber so that it can be used as an adsorbent to reduce COD levels in POME. POME is a brown liquid released from the factory which contains a lot of dissolved solids. COD is the total amount of oxygen required to chemically or biologically oxidize organic matter to CO₂ and H₂O. This study aims to determine the characteristics of cocoa pods and to determine the mass of the adsorbent and the optimum pH in reducing COD in POME. Cocoa shells were dried in an oven for 24 hours, then mashed and sieved using a 100 mesh size. Then activated using 0.6 M nitric acid with a ratio of 1:10. Cocoa husk adsorbent was tested for moisture and ash content, which were 10.40% and 4.08%, and characterized using SAA obtained a surface area 0.547 m²/g. Furthermore, the determination of the optimum mass and pH using the COD test method with closed reflux titrimetrically. The optimum mass of the adsorbent is 1 gram and the pH is pH 4 with an allowance for a decrease of 40%; 96%, the COD content is 153,187.2 mg/L; 8,510.4 mg/L with an adsorption capacity of 5,106.24 mg/g:12,340.08 mg/g.
Synthesis of Cellulose Acetate From Coil Waste (Borassus flabellifer L) Using Delignification Time Variations: Sintesis Selulosa Asetat Dari Limbah Sabut Lontar (Borassus flabellifer L) dengan Menggunakan Variasi Waktu Delignifikasi Batu, Matius Stefanus; Kolo, Maria Magdalena; Rika, Fransiska
Stannum : Jurnal Sains dan Terapan Kimia Vol 6 No 2 (2024): October 2024
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v6i2.4113

Abstract

Synthesis of cellulose acetate form palm coir (Borassus flabellifer L) waste has been synthesized by varying the time in the delignification process. This study aimed to determine the characteristics of cellulose acetate form palm coir waste (Borassus flabellifer L) and the optimum time for the delignification process. This research was conducted in several stages: sample preparation, cellulose isolation (delignification and bleaching process), and synthesis of cellulose acetate (activation, acetylation, and hydrolysis process). The cellulose acetate obtained was then charatecrized by testing for water content, acetyl content, and degree of substitution and functional grup analysis using a fourier transform infra-red (FTIR) spectrophotometer. In the delignification process, variations of the delignification time were usesd, namely 60, 90, 120, and 150 minutes. Form the results of the study, the characteristics of cellulose acetate in palm coir were optained, namely water content of 0.95%‒2.16%, acetyl content of 37.19%‒40.85%, degree of substitution of 2.2‒2.6 and identification of functional groups using FTIR showed that there was a typical absorption of cellulose acetate on the carbonyl group (C=O) and the ester group (C-O acetyl). The results of variations in the time of the delignification process showed that the optimum reaction time was 120 minutes with the yield of cellulose acetate produced at 254.4%, water content 2.16%, acetyl content 40.85%, degree of substitution (DS) 2.6. the cellulose acetate produced belongs to the type of cellulose diacetate, which can be further utilized in manufacturing threads, membranes, adhesives of films, and mask filters.
Effectiveness of the Combination of Alum (Al₂(SO₄)₃) and Calcium Hydroxide (Ca(OH)₂) Coagulants in the Removal of Manganese (Mn) Using the Coagulation-Flocculation Process: Efektivitas Kombinasi Koagulan Alum (Al2(SO4)3) dan Kalsium Hidroksida (Ca(OH)2) pada Penghilangan Logam Mangan (Mn) Menggunakan Proses Koagulasi-Flokulasi Simanullang, Samuel Putra Mandiri; Afandy, Moh. Azhar; Sawali, Fikrah Dian Indrawati
Stannum : Jurnal Sains dan Terapan Kimia Vol 6 No 2 (2024): October 2024
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v6i2.4301

Abstract

A technique for reducing the contamination of heavy metals in wastewater is the coagulationflocculation method. The approach has various advantages, including a simple process, readilyavailable chemicals, inexpensive equipment costs, and an excellent capacity to remove pollutants. The goal of this research is to see how well Mn-containing wastewater can be reduced using alum and calcium hydroxide as coagulants. The adsorption capacity of the coagulant combination in the floc generation phase of the coagulation-flocculation process can also be calculated. The technique used is coagulation-flocculation, with modifications made to the coagulant content and stirring duration. The data was then evaluated using an Atomic Absorption Spectrophotometer (AAS) to assess the decrease Mn concentration in wastewater. According to the experiments, the combination of alum and calcium hydroxide coagulants with a mass composition ratio of alum:calcium hydroxide (150 mg:50 mg) and a stirring time of 15 minutes has the highest efficiency of 89.35% and is directly proportional to the adsorption capacity value of 446.75mg/gram.
A Comparison of Anti-inflammatory Activity of Ethanol Extracts of Young and Old Areca Seeds (Areca catechu L.) in vitro Legasari, Leni; Wati, Ambar; Yani, Dwi Fitri
Stannum : Jurnal Sains dan Terapan Kimia Vol 5 No 2 (2023): Oktober 2023
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v5i2.4376

Abstract

Areca catechu L. has been widely used as a traditional medicine in medicinal practices in various countries around the world. Areca nut contains secondary metabolite compounds such as alkaloids, flavonoids, triterpenoids, steroids, and tannins so it has great potential to be developed as a medicine. The use of anti-inflammatory drugs from natural ingredients is widely developed because synthetic non-steroidal anti-inflammatory drugs cause side effects to the body such as nausea, diarrhea, headaches, and stomach ulcers. This study aims to determine the content of secondary metabolites and determine the anti-inflammatory activity of ethanol extracts of young and old areca nut seeds. Old areca nut seeds used are areca nut fruits that have an orange color while young areca nut seeds are areca nut fruits that have a green color. The anti-inflammatory activity test method was carried out using the protein denaturation inhibition method at 5, 10, 15, and 20 ppm extract concentrations. The results of this study indicate that young and old areca nut seeds positively contain alkaloids, flavonoids, tannins, and saponins and negatively contain steroids. The results of anti-inflammatory activity testing show that ethanol extracts of young and old areca nut seeds have the potential as anti-inflammatory because they have a percentage value of protein denaturation inhibition greater than 20%. A comparison of anti-inflammatory activity between areca nut seeds can be seen from the IC50 value of ethanol extract. The IC50 results show that young areca seeds have an IC50 value of 7.42 ppm which is higher than the old areca seeds of 11.52 ppm
Phytochemical Analysis and Study of Molecular Docking of Leucaena leucocephala Leave Extract as Anticancer Ariefin, Mokhamat; syarpin, Syarpin; Harianto, Bibit
Stannum : Jurnal Sains dan Terapan Kimia Vol 6 No 1 (2024): April 2024
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v6i1.4387

Abstract

Cancer is a disease caused by unnatural cell growth in the body. It has become a disease with a high mortality rate in the world. Several therapies have been developed for cancer treatment, one of which is the exploration of the bioactivity of compounds contained in potentially medicinal plants. One of the potential medicinal plants that grows in Central Kalimantan province is L. leucocephala. In this study, the potential of L. leucocephala leaf extract was explored through phytochemical tests and molecular docking approaches. Based on the phytochemical test, it was found that L. leucocephala leaf extract contains flavonoids, terpenoids, and steroids. Based on the test results, a literature study was conducted on the flavonoids and terpenoids content in L. leucocepala leaf extract and molecular docking studies were conducted. Seven dominant compounds of L. leucocephala consisting of flavonoids and terpenoids were tested for their potential as inhibitors of receptor tyrosine kinase. The molecular docking results showed that flavonoid ligands (1-6) had more negative binding affinity values compared to the drug sunitinib, a common drug for cancer therapy, while terpenoid ligand (7) had less favorable binding energy. Based on the Lipinski rule of five test, ligands 1, 2, 4, and 5 fulfill all the criteria given as drug candidates, while ligands 3, 6, and 7 only fulfill 3 out of 5 criteria. Based on Lipinski rule of five and molecular docking, ligand 1,2,4, and 5 has potential to be anticancer.
The Synthesis of Zinc Oxide (ZnO) Nanoparticles Using Extract Tomato (Solanum lycopersicum) As Capping Agent and Its Antioxidant Activity Yanti, Demi Dama; Angelina, Glory; Ashari, Arif; Agung, Ahmad Anggraria Jaya; Ayuwulanda, Aditya
Stannum : Jurnal Sains dan Terapan Kimia Vol 6 No 1 (2024): April 2024
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v6i1.4394

Abstract

Zinc oxide (ZnO) nanoparticles are one of the most widely studied nanoparticles for various applications and other alternatives because of their unique properties. The uniqueness of these properties depends on the technique used to synthesize ZnO nanoparticles. This study aims to synthesize ZnO nanoparticles using tomato crude extract as a capping agent and to analyze the antioxidant activity of ZnO nanoparticles using DPPH and ascorbic acid as standard solutions. The synthesized powder of ZnO nanoparticles was characterized using XRD and SEM. The results obtained for the crystal size of the capping agent and without the capping agent were 20.597 nm and 24.717 nm according to JCPDS No. 00-036-1451. The particle size of ZnO using tomato extract as a capping agent is 43.325 nm which indicates that the particles are in the nanosize range and are spherical in shape. The IC50 yield of ZnO nanoparticles using a capping agent was 133.9623 ppm which indicated that ZnO nanoparticles had moderate antioxidant activity.

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