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All Journal Tadris: Jurnal keguruan dan Ilmu Tarbiyah Aptisi Transactions on Technopreneurship (ATT) Molluca Journal of Chemistry Education (MJoCE)
Yeanchon Henry Dulanlebit
Chemistry Education Study Program, Faculty Of Education And Teacher Training, Pattimura University
Humanities Chemistry Computer Science & IT Economics, Econometrics & Finance Education Social Sciences

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ANALISIS KADAR KARBOHIDRAT, VITAMIN C, β-KAROTEN DAN BESI (Fe) PADA BUAH KERSEN (Muntingia calabura L) SECARA SPEKTROFOTOMETRI UV-VIS Aldrik M Makahity; Yeanchon H Dulanlebit; Nazudin Nazudin
Molluca Journal of Chemistry Education (MJoCE) Vol 9 No 1 (2019): Molluca Journal of Chemistry Education (MJoCE)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/MJoCEvol9iss1pp1-8

Abstract

Kersen fruit (Muntingia calabura L) is a fruit is existence found in everywhere, but generally nothing interest for consumtion almost people. In a kersen fruit contained many nutriet, aim from the study that is determine carbohydrate, vitamin C, β-caroten, and Fe levels in kersen fruit in the gain at Air Louw Village, Nusaniwe Sub-district, Ambon City. In this study analize sample using spectrophotometry UV-Vis with wavelength carbohydrate 486 nm, vitamin C 273 nm, β-caroten 473 nm and Fe 474 nm and using technique calibration curve. Analyze result is showed that carbohydrate level by 343,393 mg/100 g, vitamin C level by 178,96 mg/100 g, β-caroten level by 1,4831 mg/100 g, and Fe levels by 0,1025 mg/100 g. Based result study can conclusion if kersen fruit can be consumption as food material because having nutrient contet enough for human’s body
UJI FITOKIMIA DAN AKTIVITAS ANTIOKSIDAN EKSTRAK BUAH DAN KULIT PISANG JARUM (Musa acuminata var. Jarum (AA Group)) Fensia Analda Souhoka; Yeanchon H Dulanlebit; Ester M. C Tomasoa
Molluca Journal of Chemistry Education (MJoCE) Vol 9 No 1 (2019): Molluca Journal of Chemistry Education (MJoCE)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/MJoCEvol9iss1pp60-69

Abstract

This study aimed to determine phytochemical tests and antioxidant activity of fruit and peel extract of pisang jarum. Sample was extracted with 80% of ethanol, methanol, and acetone using reflux method. The result showed that pisang jarum extract contains phenols, flavonoids, and terpenoids, whereas peel extract contains phenols, flavonoids, terpenoids, alkaloids, and saponins. The total phenol content (TPC) of pisang jarum is 0.0250-0.0316 mg PE/g extract and peel is 0,1756-0,2679 mg PE/g extract. The total flavonoid content (TFC) of pisang jarum is 0.8412-1.4466 mg QE/g extract and peel is 3.2128-5.1073 mg QE/g extract. The antioxidant activity of extract were analyze by DPPH free radical scavenging activity. The antioxidant activities (IC50) of pisang jarum is 1092.92-3871.24 ppm and peel is 310.08-558.07 ppm, so it is classified as a weak antioxidant
ANALISIS KADAR KALSIUM (Ca) DAN FOSFOR (P) PADA DAUN KECIPIR (Psophocarpus tetragonolobus L) DI PULAU AMBON DAN SERAM BAGIAN BARAT Tryvena Lesnussa; Nikmans Hattu; Yeanchon H Dulanlebit
Molluca Journal of Chemistry Education (MJoCE) Vol 9 No 1 (2019): Molluca Journal of Chemistry Education (MJoCE)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/MJoCEvol9iss1pp46-54

Abstract

One of the leaves that can be consumed to fill nutritional need for people’s is kecipir leaves (Phosphocarpus tetragonolobus L). This leave contains minerals among them caloium, potassium and phosphorus but the level is calcium potassium and phosphorus at kecipir not yet know. Therefor this study was making conduoted to find out level of caloium, potassium and phosphorus in kecipir leave at two different location that is Urimesing village and Eti village. Calcium and potassium levels are analyzed SSA while phosphorus levels are analyzed UV-VIS analysis result indicate calcium, potassium, phosphorus level in kecipir leaves at urimeseng village is 904,25 mg/100g, is 100,46 mg/100g and calcium potassium, phosphorus levels in kecipir leave at Eti village is 1.162,59 mg/100g and 190,498 mg/100g. based on these result obtained calcium, potassium and phosphorus levels with different values from each sampling location. This happened because of geographic location, soil structure and water content greatly affect the levels of calcium, potassium, and phosphorus.
ANALISIS TIMBAL DALAM LINDI (Leachate) SECARA KOAGULASI MENGGUNAKAN POLIALUMINIUM KLORIDA Astrianty Unwakoly; Nikmans Hattu; Yeanchon H Dulanlebit
Molluca Journal of Chemistry Education (MJoCE) Vol 9 No 1 (2019): Molluca Journal of Chemistry Education (MJoCE)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/MJoCEvol9iss1pp38-45

Abstract

Leachate is a liquid arising from the decomposition of waste that has decayed due to the flow of external water into the landfill. Leachate can be toxic. generally, leachate contains several high inorganic metals, including lead. Lead is one type of heavy metal that has a high toxicity. This study aims to determine the initial concentration of lead (Pb) in leachate and the percent efficiency of polyaluminium chloride (PAC) coagulant in reducing lead levels in IPST Toisapu, Ambon City. Lead content was analyzed by coagulation using an atomic absorption spechtrophotometer (AAS). Coagulation is a chemichal process used to remove particles that can cause environmental pollution. The coagulant used is a polyaluminium chloride coagulant. The results of the analysis showed that the initial lead concentration at IPST Toisapu was 2.7670mg/L and the percentage of PAC coagulant efficiency was 500, 600, 700, 800 and 1000 mg/L respectively 61,59%; 69,92%; 73,55%; 77,17% and 84,79%. The results showed that PAC coagulant was effective in reducing lead levels in leachate.
STUDI POTENSI Pteris vitata, Amaranthus spinosus, Ipomoea reptanspoir SEBAGAI FITOREMEDIATOR TANAH TERCEMAR MERKURI (Hg) Yeanchon H Dulanlebit; Semuel Unwakoly; Ritti P Sangadji
Molluca Journal of Chemistry Education (MJoCE) Vol 11 No 1 (2021): MJoCE
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/MJoCEvol11iss1pp32-38

Abstract

Kerusakan lingkungan dan menurunnya kualitas hidup organisme akibat pencemaran logam merkuri (Hg) telah terjadi, dimana merkuri bereaksi dengan metana hasil dekomposisi senyawa organik membentuk metil merkuri yang bersifat toksik. Dewasa ini, beberapa penelitian pada kasus pencemaran merkuri diarahkan pada upaya remediasi lingkungan. Salah satu metode remediasi adalah menggunakan tanaman sebagai bioremediator yang mampu menyerap merkuri di lingkungan tanah dan perairan. Bioremediasi dengan pola fitoremediasi sangat ditentukan oleh jenis tumbuhan, iklim, dan kondisi tailing dimana semua tumbuhan memiliki kemampuan menyerap logam tetapi dalam jumlah bervariasi. Upaya remediasi lingkungan secara bioremediator menggunakan Tanaman Paku Pakis (Pteris vitata), Bayam Duri (Amaranthus spinosus), dan Kangkung Darat (Ipomoea reptanspoir) diharapkan mampu mengakumulasi merkuri dalam konsentrasi tinggi (hiperakumulator) sehingga dapat memulihkan tanah yang tercemar memalui penyerapan dan mengakumulasi merkuri di dalam jaringannya. Potensi tanaman sebagai fitoremediator merkuri dilakukan melalui pendekatan Bio-Concentration Factor (BCF) dan Translocation Factor (TF) yang didahului dengan analisis secara Mercury Analyser. Dari hasil didapatkan bahwa konsentrasi merkuri (Hg) pada tanah, pada akar, dan pada daun tanaman Pteris vitata masing-masing 1,46 mg.Kg-1; 0,41 mg.Kg-1; dan 0,08 mg.Kg-1, tanaman Amaranthus spinosus masing-masing 1,28 mg.Kg-1; 0,25 mg.Kg-1; dan 0,02 mg.Kg-1, dan tanaman Ipomoea reptanspoir masing-masing 1,92 mg.Kg-1; 1,06 mg.Kg-1; dan 0,12 mg.Kg-1. Nilai Bio-Concentration Factor (BCF) untuk masing-masing tanaman 0,28; 0,19; dan 0,55 dan Translocation Factor (TF) masing-masing 0,19; 0,08; dan 0,11. Hasil didapatkan bahwa ketiga tanaman hiperakumulator tidak efektif sebagai fitoremediator merkuri., walaupun efisiensi penyerapan masing-masing tanaman 33,56%, 21.09%, dan 61,46%.
ANALISIS KADAR LOGAM TIMBAL (Pb) PADA SEDIMEN DI PERAIRAN PELABUHAN HITU Abraham Mariwy; Anjarnita Haupea; Yeanchon H Dulanlebit; Yusthinus T Male
Molluca Journal of Chemistry Education (MJoCE) Vol 12 No 2 (2022): MJoCE
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/MJoCEvol12iss2pp84-95

Abstract

Pelabuhan Hitu merupakan salah satu pelabuhan strategis di Kabupaten Maluku Tengah yang berada di Kecamatan Leihitu Pulau Ambon, pelabuhan ini merupakan sarana transportasi laut, sehingga banyak aktivitas yang dilakukan di sekitar pelabuhan hitu. Aktivitas masyarakat tersebut dapat menimbulkan peningkatan logam berat seperti Pb. Penelitian ini dilakukan di perairan pelabuhan Hitu, dengan tujuan untuk mengetahui kandungan logam berat timbal (Pb) pada sedimen. Ukuran butir sedimen diukur dengan menggunakan Sieve Shaker dan sampel dianalisis menggunakan Atomic Absorption Spectrophotometer (AAS). Hasil penelitian menunjukan bahwa ukuran butir partikel sedimen adalah gravel berkisar antara 0,14-8,18%, pasir 48,68-90,03% dan lumpur 4,59-39,27%. Kadar timbal (Pb) pada sedimen di semua Stasiun pengamatan telah melewati standar baku mutu yang ditetapkan oleh Keputusan Menteri Negara Lingkungan Hidup Nomor 51 Tahun 2004 tentang Baku Mutu Air Laut yaitu 0,05 mg/l dengan kadar logam Pb pada stasiun I 9,9175 mg/kg, pada stasiun II 16,44 mg/kg, stasiun III 11,9575 mg/kg, stasiun IV 8,425 mg/kg dan pada stasiun V 9,1075 mg/kg
Enhancing Critical Thinking Skills through Project-Based Chemistry Practicum Using Seaweed Hydrogel Design Dulanlebit, Yeanchon Henry; Hernani, Hernani; Liliasari, Liliasari; Amran, Muhammad Bachri
Tadris: Jurnal Keguruan dan Ilmu Tarbiyah Vol 9 No 2 (2024): Tadris: Jurnal Keguruan dan Ilmu Tarbiyah
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/tadris.v9i2.24847

Abstract

This study explores the effectiveness of a project-based chemistry practicum in enhancing critical thinking and conceptual understanding among chemistry teacher candidates. Using a seaweed-based hydrogel as a medium for adsorbing metal ions, the practicum incorporates contextual learning processes, including problem investigation, collaborative engagement, and technology design. Conducted with 36 students at Pattimura University, the study applied a mixed-methods approach, combining qualitative observations and quantitative data analysis. Results indicate significant improvements in students' critical thinking, as evidenced by an N-Gain of 0.72, enhanced worksheet scores, and better practicum outcomes. The findings underscore the importance of integrating environmental resources and technological tools in practicum activities to foster creativity and innovation. However, the study highlights the need for adequate laboratory resources, extended practicum time, and advanced rubrics to assess complex learning outcomes effectively. These insights contribute to the development of advanced chemistry practicum models that align with 21st-century learning skills.
Technopreneurship and Market Feasibility of Modified Carrageenan Hydrogel for Industrial Heavy Metal Remediation Dulanlebit, Yeanchon Henry; Hernani, Hernani; Liliasari, Liliasari; Amran, Muhammad Bachri; Pangilinan, Greian April
Aptisi Transactions On Technopreneurship (ATT) Vol 8 No 1 (2026): March
Publisher : Pandawan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34306/att.v8i1.622

Abstract

Heavy metal pollution in aquatic systems increases the need for sustainable and efficient natural adsorbent materials, and carrageenan extracted from Eucheuma cottonii, which contains O–H, S=O, C–O–S, and 3,6-anhydrogalactose functional groups, offers strong potential for binding metal ions. However, the adsorption efficiency of natural carrageenan for Copper (Cu2+) and Cadmium (Cd2+) ions remains limited, which frames the central problem of this study. In addressing this issue, the method employed involves synthesizing carrageenan hydrogel through alkaline extraction of Eucheuma cottonii and evaluating its adsorption capacity under controlled experimental conditions. The hydrogel was characterized and tested at pH 6–7, with a contact time of 90 minutes, an initial concentration of 200 mg/L, and an adsorbent mass of 6 g, followed by kinetic and isotherm modeling to analyze adsorption behavior. Based on the Findings, ionic exchange interactions between sulfate ester groups of K-carrageenan and metal cations significantly enhance adsorption performance, with the adsorption process following a pseudo-second-order kinetic model and the Freundlich isotherm providing the best fit R2 > 0.90, indicating heterogeneous multilayer adsorption. In the Conclusion, the chemically modified carrageenan hydrogel demonstrates effective adsorption of copper and cadmium ions and presents strong potential as an eco-friendly and efficient biomaterial for heavy metal remediation.
Co-Authors Abraham Mariwy Aldrik M Makahity Anjarnita Haupea Astrianty Unwakoly Ester M. C Tomasoa Fensia Analda Souhoka HERNANI - Hernani Hernani Liliasari , Muhammad Bachri Amran Nazudin Nazudin Nikmans Hattu Pangilinan, Greian April Ritti P Sangadji Semuel Unwakoly Tryvena Lesnussa Yusthinus T. Male