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Gedung Dharma Pengabdian, Department of Chemistry, Faculty of Engineering, Kampus Tepadu Universitas Bangka Belitung Balunijuk, Kab. Bangka, Prov. Kep. Bangka Belitung
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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 74 Documents
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The Isotherm Studies of Cu (II) Adsorption in Kolong Bangka’s Water onto NaOH-Deacetylated Shrimp Shells Waste Chitin Desy Yuliana Dalimunthe; Anisa Indriawati; Endang Setyawati Hisyam; Herman Aldila
Stannum : Jurnal Sains dan Terapan Kimia Vol 5 No 1 (2023): April 2023
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v5i1.3848

Abstract

Isotherm models of Cu (II) adsorption in Kolong Bangka’s water onto NaOH-deacetylated shrimp shells waste chitin was studied. The extraction of chitin was carried out through three steps: deproteinization, demineralization and decolorization. The deacetylated shrimp shells waste chitin (DA-SW chitin) were prepared by the reaction of DA-SW chitin with NaOH at varying concentrations of 20, 40 and 60% (%W) with stirring for 1 hour at room suhue where the degree of deacetylation for varying NaOH concentrations were 65.72, 67.44 and 88.98%, respectively based on our previous research. Increasing the NaOH concentration causes the diffusion rate of OH- increase thus realizing the effectiveness of OH- attack on the carbonyl carbon group in chitin acetamide increasing so that the chitin deacetylation process becomes more effective. In order to study adsorbent equilibrium behaviour, Freundlich and Langmuir isotherm models were used based on Cu (II) adsorption data with variations in contact time 5, 10, 15, 20, 25, and 30 minutes. The results showed that the concentration of Cu (II) decreased with the increase of the degree of deacetylation and contact time. The optimum condition for the percentage of Cu (II) adsorption was achieved in DA-SW chitin with NaOH 60% (where the degree of deacetylation was 88.98%) during 30 minutes was 97.19%. The Cu (II) adsorption isotherm model in Kolong Bangka water onto DA-SW chitin is represented by the Freundlich isotherm model where the Cu (II) adsorption mechanism onto DA-SW chitin causes the formation of multilayer surface which may due to Van der Waals force.
Liquid Soap with Active Ingredients of Methanol Extract of Sambang Darah Leaves (Excoecaria cochinchinensis L.): Formulation, Characterization, and Antibacterial Activity Fatkhurrachman Fatkhurrachman; Avidlyandi Avidlyandi; Devi Nurhasana; Dina Erliana; Munifilia Eka Sari; Charles Banon; Risky Hadi Wibowo; Morina Adfa
Stannum : Jurnal Sains dan Terapan Kimia Vol 5 No 1 (2023): April 2023
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v5i1.3845

Abstract

The methanol extract of sambang darah leaves (Excoecaria cochinchinensis L.) contains flavonoids, saponins, tannins and triterpenoids which have the potential as antibacterial compounds. The goal of this research is to produce liquid soap that preparations with four formulas by varying the methanol extract of sambang darah leaves as the active ingredient, characterizing, and understanding its antibacterial activity. Organoleptic tests, foam stability, pH, specific gravity, and viscosity were all used to characterize liquid soap. The best results were obtained with liquid soap formulation 3 (3 g extract), which had foam stability of 84.10%, a pH of 9.62, specific gravity of 1.03 g/mL, and viscosity of 492.933 cP. The organoleptic test revealed that the liquid soap was a homogeneous viscous liquid with a blackish-brown color and a characteristic extract odor. The inhibition zone for antibacterial activity against Staphylococcus aureus and Escherichia coli was 9.15 mm and 13.72 mm, respectively. In antiseptic tests, all soap formulas reduced bacteria on the thumb.
Cholesterol Lowering Activity from Methanol Extract of Bidara Leaves (Ziziphus mauritiana) Isna Lailatusholihah; Weny JA Musa; Lintang Panji Setyoko; Holisha Widiyanto; Nurhayati Bialangi; Boima Situmeang
Stannum : Jurnal Sains dan Terapan Kimia Vol 5 No 1 (2023): April 2023
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v5i1.3847

Abstract

Research on qualitative test of secondary metabolites compounds and test of lowering cholesterol activity has been done on bidara leaves (ziziphus mauritiana) with methanol extract by maceration methods. The aim of this research was to determine cholesterol-lowering activity of methanol extract on bidara leaves (ziziphus mauritiana). The procedure used was in this study consisted of extraction, phytochemicals screening such as alkaloids, tannins, triterpenoids, flavonoids and saponins, and test of cholesterol lowering activity using UV-Vis spectrophotometry at a wavelength of 423 nm. Based on research results, determine cholesterol lowering activity of methanol extract on bidara leaves (ziziphus mauritiana) has proven to reduce cholesterol levels by 80.4598% because of bidara leaves contains of active secondary metabolites such as triterpenoids, tannins and flavanoids.
Uji Fitokimia dan Penentuan Nilai Sun Protection Factor (SPF) Ekstrak Etanol Daun Waru (Hibiscus tiliaceus) Dwi Fitri Yani; Rahma Hidayani; Weni Febriani; Selvira Aurelia; Doni Putra Pratama
Stannum : Jurnal Sains dan Terapan Kimia Vol 5 No 1 (2023): April 2023
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v5i1.3785

Abstract

Waru leaves (Hibiscus tiliaceus) is one part of the plant that contains many secondary metabolites. One of them which have photoprotector properties that can absorbs UV rays and antioxidant properties. This study aims to determine the value of sun protection factor (SPF) using extracts ethanol. Waru leaves are extracted using 96% ethanol solvent which is then concentrated using a rotary evaporator at 40°C to evaporate the ethanol solvent. The ethanol extract contains alkaloids, tannins, flavonoids, saponins, and terpenoids. The activity of the ethanol extract of waru leaves was measured for its absorbance using a UV-Vis instrument. The highest SPF value is found in the ultra protective concentration of 1000 ppm with an SPF value of 42,29. The SPF value of the ethanol extract produced at absorbances of 200 ppm, 400 ppm, 600 ppm, 800 ppm, and 1000 ppm respectively were 4,09; 8,17; 12,48; 17,31; dan 42,29. The ethanol extract of waru leaves can protect as a sunscreen in the concentration range 200 ppm to 1000 ppm.
Antioxidant Activity Testing Combination of Moringa Leaf (Moringa oleifera L.) and Bambian (Ocimum sanctum L.) Leaves Extract Using DPPH Method Endah Dwijayanti; Masli Nurcahya Zoraida; Siti Rahayu Kurnianingsih
Stannum : Jurnal Sains dan Terapan Kimia Vol 5 No 1 (2023): April 2023
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v5i1.3797

Abstract

Research on the antioxidant activity combination of the ethanol extract of Moringa (Moringa oleifera L.) and basil (Ocimim sanctum L.) leaves has been carried out. The purpose of this study was to identify the content of secondary metabolites and measure the value of antioxidant activity as well as the maximum ratio of the combination of ethanol extract of Moringa leaves and basil leaves. The research methods include maceration extraction using 70% ethanol as a solvent, phytochemical screening using specific reagents and antioxidant activity testing using the DPPH method. The results of the phytochemical screening test for Moringa leaf extract and basil leaves were positive for containing chemical compounds of the flavonoid and tannin groups. The antioxidant activity test of Moringa leaf ethanol extract obtained IC50 results of 69.474 ppm which was categorized as a strong antioxidant, while basil leaves of 34.663 ppm which was categorized as very strong antioxidant, while the results of the combined study of antioxidant activity test of Moringa leaf ethanol extract and basil leaves obtained IC50 results at the ratio of 25:25 mg is 51.589 ppm and the ratio of 35:15 mg is 57.009 ppm which was categorized as a strong antioxidant, while at 15:35 mg is the optimum ratio because the IC50 result is 42.714 ppm which was categorized as very strong.
The Influence of the Type of Feed Medium on the Growth of Hermetia illucens larvae in the Process of Reducing Organic Waste S Syaiful Bahri; Yuli Ambarwati; Ni Luh Gede Ratna Juliasih; Muhammad Trijatmiko
Stannum : Jurnal Sains dan Terapan Kimia Vol 5 No 1 (2023): April 2023
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v5i1.3893

Abstract

Increasing the effectiveness of waste management and processing is by utilizing waste into a protein source of fish feed ingredients through the bioconversion process. One of the insects that is usually used as a bioconversion process is Hermetia illucens or better known as BSF (Black Soldier Flies). This study was conducted to look at the bioconversion process carried out by the larvae of Hermetia illucens and to look at the morphology of the length and body weight of the larvae of Hermetia illucens. This research was conducted at the Integrated Waste Treatment Plant (TPST) of Lampung University. The variety of waste used is market waste, tofu dregs, and a mixture of market waste and tofu dregs (1:1). The most optimal results of measuring the body length of Hermetia illucens larvae was tofu pulp feed type, which is an average of 2.17 cm. The most optimal results of measuring the body weight of Hermetia illucens larvae are Hermentia Illucens larvae of the market waste feed type with an average weight of 0.336 g. Proximate test results from Hermentia Illucens larvae are the larvae of tofu pulp feed media with a protein content of 41.27% and fat of 27.42%, it can be concluded that Hermentia Illucens larvae From the feed medium tofu pulp is best because it contains high protein content and not too high fat con
Pemanfaatan Limbah Tulang Ikan (Rastrelliger kanagurta) sebagai Tepung Kalsium Tinggi Nila Tanyela Berghuis; Ida Fitri Maharani; Cantika Samsrestu R; Rahmad Gunawan; Sri Wahyuni Siregar; Sherina Saskia; Alfiyah Qaulan
Stannum : Jurnal Sains dan Terapan Kimia Vol 5 No 1 (2023): April 2023
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v5i1.4047

Abstract

Fish bones are one of the by-products of processing fish fillets. The yield produced from the process of making fish fillets produced is only about 36% and the remaining 64% is waste that is lost in each processing process. Fish bones consist of organic compounds and inorganic compounds (minerals). The waste generated from the fish processing industry has the highest calcium content in the fish body. From the point of view of food and nutrition, fish bones are very rich in calcium that humans need, because the main elements of fish bones are calcium, phosphorus, and carbonate. Thus, fish bone waste has great potential to be used as raw material for calcium-rich fish bone meals. In this study, the utilization of mackerel bones will be studied, so it is very important to know the formula for the best concentration of mackerel bone meal, to know the potential calcium content in mackerel bones. The characterization in this project is intended to determine and determine the experimental results quantitatively. The characterizations carried out in this study were atomic absorption spectrophotometer (AAS) to determine the levels of Ca, Fe, and Zn and UV-Vis spectrophotometer to determine phosphate levels in mackerel bones. The results of the average mineral levels of Zinc, Iron, and Calcium respectively were 32.425 mg/100 gr, 4.3 mg/100 gr, and 213.825 mg/100 gr. While the value of phosphate concentration in mackerel bone meal was 2784.116 ppm. This is following the standards of BPOM.
The Effect of Temperature, Stirring, and Contact Time on Reducing Chemical Oxygen Demand (COD) Levels of Palm Oil Mill Effluent (POME) Using Cocoa Peels Adsorbent (Theobroma cacao L.) Firstin Rizki Annisa Hasibuan; Fajar Indah Puspita Sari; Occa Roanisca
Stannum : Jurnal Sains dan Terapan Kimia Vol 5 No 1 (2023): April 2023
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v5i1.3787

Abstract

Cocoa peels (Theobroma cacao L.) are one of the plantation wastes that haven’t been used optimally. The content of cocoa peels makes the peels potential to be used as an adsorbent to reduce COD levels of POME. POME is liquid waste from the processing palm oil industry. This study was aimed to determine the characteristics of the cocoa peels adsorbent and the effectiveness of using cocoa peels adsorbent in reducing COD levels of POME. The powder was activated using nitric acid to increase the surface area of the adsorbent. The cocoa peels adsorbent was further characterized to determination water and ash content, FTIR analysis, and SAA. Cocoa peels adsorbent contains 10.40% moisture and 4.08% ash. FTIR analysis showed the presence of groups O–H, C–H, C=C, C–O– C, C–O, C–NO2 on the adsorbent of cocoa peels. The surface area of the adsorbent cocoa peel increased after activation from 3.48071 m2/g to 3.93845 m2 /g. The method used to test the content COD of POME is closed reflux titrimetrically. Adsorpstion process used variation like temperature, stirring speed, and contact time. The best reduction was obtained at 30oC with a stirring speed of 600 rpm at 120 minutes contact time, with 76.19% removal percentage for COD.
Comparative Study Of The Use Of Natural Ingredient In Ethnomedical Study In Indonesia On The Herbal Formulary Of The RI Ministry Of Health Fatimah Azzahra; M Yusuf Samad
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.v5i2.3895

Abstract

Geologically based on the Wallace-Weber line, the distribution of flora in Indonesia is divided into 3 regions, namely the west which is influenced by the Asian continent, the middle which is a transition, and the east which is influenced by the Australian continent. Research on ethnomedicin from various regions has been carried out including representatives from each region. A review of the ethnomedicine studies was comparing various region of Indonesia namely Jambur Labu Village (DJL) in Jambi Province, Sangihe Island (PS) in North Celebes, Morotai in North Maluku (MU), Secang District in West Java, the Dayak Tribe in East Kalimantan, and Jayawijaya District in Papua to the Original Indonesian Herbal Medicine Formulary (FOHAI). From ethnomedicine research conducted in 9 regions in Indonesia from the islands of Sumatra, Java, Kalimantan, Sulawesi, Maluku, and Papua, it was found that Psidium guajava was used the most, namely by 8 regions and generally as an anti-diarrheal, then turmeric was used by 7 regions. Annona muricata, Morinda citrifolia, Musa paradisiaca, Piper betle, Syzygium Polyanthum, and Zingiber officinale were used in 6 areas. Among the most utilized plants, Piper betle and Musa paradisiaca have not been included in FOHAI data.
Total Phenolic and Flavonoid Test of Gleichenia linearis Leaf Extract as Antioxidant Using Microwave Assisted Extraction Sri Rizki Pratiwi; Occa Roanisca; Nurhadini Nurhadini
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.v5i2.4318

Abstract

Paparan sinar ultra violet (UV) yang bersumber dari cahaya matahari dan paparan radiasi seperti penggunaan ponsel, laptop, dan lain-lain dapat menjadi faktor terbentuknya radikal bebas. Paparan radikal bebas berlebih akan menyebabkan stres oksidatif sehingga diperlukan pertahanan yang dapat mencegah kerusakan, salah satunya menggunakan antioksidan. Salah satu sumber antioksidan adalah daun resam. Ekstrak daun resam diketahui memiliki kandungan flavonoid, alkaloid, tanin, saponin, steroid dan triterpenoid. Penelitian ini bertujuan untuk mengetahui pengaruh pelarut dan variasi waktu ekstraksi terhadap rendemen, total fenolik, total flavonoid, dan aktivitas antioksidan ekstrak daun resam, serta mengetahui hubungan antara kandungan total fenolik dan kandungan total flavonoid terhadap aktivitas antioksidan. Pengujian terdiri dari uji total fenolik menggunakan metode Folin-Ciocalteau, uji total flavonoid menggunakan metode AlCl3, dan uji antioksidan menggunakan metode DPPH. Pelarut yang digunakan berupa aseton dan etanol, sedangkan lama waktu ekstraksi yang digunakan yaitu 5, 10, 15 dan 30 menit. Hasil rendemen, total fenolik, total flavonoid, dan aktivitas antioksidan tertinggi pada penelitian ini dihasilkan oleh pelarut etanol dengan waktu MAE selama 10 menit, dengan nilai berturut-turut 62,21%, 172,9 mg EAG/g, 110,60 mg EK/g, dan 24,12 µg/mL. Pengujian korelasi menunjukkan total fenolik berperan sebesar 95,5% sedangkan total flavonoid berperan sebesar 56,5% terhadap aktivitas antioksidan (IC50) yang dihasilkan. Fenolik merupakan senyawa yang paling dominan didalam ekstrak daun resam yang berperan sebagai antioksidan.

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