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Gaspersz, Nelson
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Analisis Kadar Logam Kadmium (Cd) dan Timbal (Pb) pada Sedimen Di Teluk Ambon Bagian Dalam Male, Yusthinus T; Malle, Dominggus; Bijang, Catherina Manukpadang; Fransina, Eirene Grace; Seumahu, Cecelia Anna; Dolaitery, Lois Mikhal; Landu, Sartika; Gaspersz, Nelson
Indonesian Journal of Chemical Research Vol 5 No 1 (2017): Edisi Bulan Juli (Edition For July)
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2017.5-yus

Abstract

The research about analysis of cadmium (Cd) and lead (Pb) metal content on sediment inner part of Ambon Bay has been done. Sampling point located at Dermaga Ferry Poka, PLTD Poka, Kate-kate, Waiheru, Lateri III, Passo dan PLTD Galala. The results of analyzed of sediment particle size inside the Ambon Bay showed 3 components were sand, gravel, and sludge, but the sediments was dominated by sludge sand. Analysis of Cd content showed that at 7 stations in Ambon Bay detected Cd metal with the highest concentration at 4th station of Waiheru village was 0,6640 mg/Kg and the lowest concentration at 3th station of Kate-kate village was 0,0980 mg/Kg. Meanwhile, the highest Pb content was 20,075 mg/kg at 4th station and the lowest was 5,755 mg/kg at 2nd station of PLN Poka. The content of elements composition of sediment are SiO2, K2O, P2O5, Fe2, BaO, NiO and Ga2O3 but Cd and Pb metal was not detected.
Penambatan Molekuler α, β, dan γ-mangostin Sebagai Inhibitor α-amilase Pankreas Manusia Gaspersz, Nelson; Sohilait, Mario Rowan
Indonesian Journal of Chemical Research Vol 6 No 2 (2019): Edisi Bulan Januari (Edition For January)
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2019.6-nel

Abstract

The in silico studies of interactions between the human pancreatic α-amylase (HPA) enzyme to α, β, and γ-mangostin ligands has been carried out using the molecular docking method. Ligands α, β, and γ-mangostin interacting through the formation of hydrogen and van der waals bonds to residues on the enzyme active side. The α-mangostin ligands resulting seven hydrogen and six van der waals bonds with the residues involved were Trp59, Gln63, Trp96, Thr163, Thr164, Ala198, His201, Glu233, and Asp300. β-mangostin resulting five hydrogen and eight van der waals bonds with residues involved were Gln63, Trp96, Thr163, Thr164, Arg195, Asp197, His201, Glu233, Asp300, and His305; while γ-mangostin forms nine hydrogen and five van der waals bonds with residues involved were Trp59, Gln63, Trp96, Thr163, Asp197, Ala198, His201, Glu233, and Asp300. The binding affinity of α, β, and γ-mangostin to the HPA enzyme obtained were -7.0; -6.6; and -7.4 kcal/mol with root mean square deviation (RMSD) value were 1,850; 1,956; and 1,811 Å respectively. Ligand γ-mangostin has potential activity as an inhibitor of HPA enzyme due to the stabilization of the complexes formation with lower binding affinity (validated with RMSD value) when compared to α and β-mangostin.
Chemicals Identification in The Ethyl Acetate Fraction and The Antioxidant Activity from Calabash Seed (Cresentia cujete) Extract Gaspersz, Nelson; Kapelle, Imanuel B. D.; Hattu, Nikmans; Sangadji, Insun; Arpipi, Henderika S. S.
HAYATI Journal of Biosciences Vol. 31 No. 6 (2024): November 2024
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.4308/hjb.31.6.1144-1153

Abstract

Calabash (Crescentia cujete) is a plant that grows in tropical climates and is scattered and easily found in Indonesia. Calabash is also known to contain several secondary metabolite compounds that have the potential as an antioxidant. This research is purposed to identify phytochemical compounds in calabash fruit seed extract, identify compounds based on the result of LC-MS, and know the antioxidant activity of calabash fruit seeds. The samples were extracted using the maceration method, and then phytochemical screening, LC-MS tests, and antioxidant tests were continued using the DPPH method. This research showed that the ethanol extract of calabash seed positive contains saponin, flavonoids, and triterpenoid compounds. Ethyl acetate extract of calabash seed contains flavonoids, alkaloids, and triterpenoids. The n-hexane extracts positively contain tannins, alkaloids, and steroids. The values of antioxidant activity of ethanol, ethyl acetate, and n-hexane extracts were IC50 = 29.7883, 7.219, and 848.712 ppm (µg/ml), respectively. Ethyl acetate extract as the best antioxidant activity was then tested with LC-MS, and results obtained from 26 compounds with the composition of the largest % area is convolvidine (11.277%), coumaroylquinic acid (8.290%) and taxchinin G (8,233%). They showed that calabash fruit seed extract has very strong antioxidant activity, with the best activity being the ethyl acetate extract of calabash fruit seed.
Peningkatan Nilai Ekonomis Buah Kelapa dengan Pembuatan Nata de Coco dari Air Kelapa di Desa Morella Rahayu, Rahayu; Sutapa, I Wayan; Bandjar, A.; Latupeirissa, Jolantje; Gaspersz, Nelson; Pattiasina, Priska Marisa
Innovation for Community Service Journal Vol 1 No 2 (2023): Oktober 2023
Publisher : Department of Chemistry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/icsj.v1i2.10625

Abstract

Maluku memiliki banyak potensi sumber daya alam khususnya dalam bidang pertanian seperti tanaman perkebunan. Salah satu tanaman perkebunan palawija yang memiliki arti strategi bagi bangsa Indonesia adalah kelapa (Cocos Nucifera L.). Masyarakat Maluku selama ini komoditas kelapa baru sebatas dimanfaatkan pada produk primernya saja dalam bentuk kelapa segar maupun kopra untuk bahan baku minyak goreng. Hasil samping dan limbah belum dimanfaatkan secara optimal, sehingga belum dapat dihasilkan nilai tambah yang berarti secara ekonomi. Oleh karena itu, sebagai bentuk implementasi dari tugas Tridarma Perguruan Tinggi dalam bidang pengabdian, maka jurusan Kimia FMIPA Unpatti tergerak untuk memberikan penyuluhan dan pendampingan kepada masyarakat desa Morella dalam pengembangan pengolahan limbah air kelapa menjadi Nata de Coco sehingga dapat memberikan manfaat dari segi perekonomian terhadap masyarakat desa. Pemanfaatan limbah air kelapa dilakukan dengan menambahkan mikroba acetobacter xylinum yang berfungsi sebagai starter pembentukan nata de coco. Pembuatan nata de coco dari air kelapa menjadi bahan tambahan pengetahuan dan informasi yang nantinya dapat dimanfaatkan oleh masyarakat desa Morella untuk mengahsilkan produk bernilai ekonomi.
Sosialisasi Kontaminasi Logam Beracun Merkuri (Hg) pada Ekosistem di Desa Tifu, Namlea, Kabupaten Buru Male, Yusthinus Thobias; Fransina, Eirene Grace; Gaspersz, Nelson; Sanawain, Lea
Innovation for Community Service Journal Vol 2 No 1 (2024): April 2024
Publisher : Department of Chemistry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/icsj.v2i1.12977

Abstract

Pada saat kegiatan Pertambangan Emas Tanpa Ijin (PETI) marak terjadi di Gunung Botak, Namlea (Tahun 2011-2016), banyak penduduk Desa Tifu yang mengolah emas menggunakan merkuri di halaman belakang rumah mereka. Secara teori, 30% dari merkuri yang digunakan akan terbuang ke lingkungan. Bekas area tromol telah dijadikan lahan pertanian sehingga sangat berpotensi terjadi biomagnifikasi, yaitu masuknya merkuri manusia melalui bahan makanan. Hasil analisis laboratorium menunjukkan bahwa ekosistem (tanah dan tumbuhan) di Desa Tifu telah terkontaminasi dengan merkuri. Kegiatan Pengabdian masyarakat dilakukan untuk memberikan data valid sekaligus edukasi kepada masyarakat tentang kontaminasi merkuri pada ekosistem bekas area tromol (tanah, tumbuhan dan hewan). Kegiatan ini juga meningkatkan pemahaman masyarakat tentang dampak buruk bagi kesehatan.
Peningkatan Pemahaman Konsep Kimia Siswa SMA Negeri 5 Ambon melalui Eksperimen Kimia Sederhana Salmawati, Mimi; Rosmawaty, Rosmawaty; Sohilait, Mario Rowan; Gaspersz, Nelson; Hasanela, Nurani; Pattiasina, Priska Marisa; Sri, Dewi
Innovation for Community Service Journal Vol 2 No 2 (2024): Oktober 2024
Publisher : Department of Chemistry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/icsj.v2i2.15668

Abstract

Kegiatan pengabdian masyarakat yang dilaksanakan di SMA Negeri 5 Ambon bertujuan untuk meningkatkan pemahaman siswa terhadap konsep dasar kimia melalui pendekatan praktikum langsung. Kegiatan ini berlangsung dalam beberapa tahapan utama: persiapan materi dan perlengkapan, pembentukan tim pengajar dan pendamping, sosialisasi kegiatan, pelaksanaan eksperimen, analisis hasil dan diskusi, serta evaluasi dan penilaian. Empat eksperimen kimia dilaksanakan dalam kegiatan ini, yaitu pembentukan gas hidrogen, uji identifikasi gas karbon dioksida, reaksi volcano, dan busa elefant. Masing-masing eksperimen dirancang untuk memberikan pengalaman praktis yang mendalam bagi siswa dalam memahami reaksi-reaksi kimia dasar dan aplikasinya. Hasil evaluasi menunjukkan peningkatan yang signifikan dalam pemahaman siswa terhadap konsep-konsep kimia yang dipelajari, peningkatan minat dan antusiasme siswa terhadap pelajaran kimia, serta peningkatan keterampilan praktikum mereka. Secara keseluruhan, kegiatan ini berhasil mencapai tujuan utamanya dan memberikan dampak positif terhadap pemahaman dan minat siswa terhadap ilmu kimia. Kegiatan ini diharapkan dapat menjadi model bagi program pengabdian masyarakat serupa di masa depan, dengan rekomendasi untuk memperluas cakupan materi dan melibatkan lebih banyak sekolah guna memperluas dampak positif yang dicapai.
The Potential of Active Compounds from Melinjo Leaves (Gnetum gnemon) as an Antihistamine using Molecular Docking Approach for Acetylcholine Muscarinic M3 Receptor Inhibition Gaspersz, Nelson; Amos, Matthew Adi Honey; Male, Yusthinus T.; Baharudin, Muh. Daswar A.; Leuwol, Dean Y.E.; El, Rahma; Pattiasina, Priska M.; Sohilait, Mario R.; Herland Satriawan
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 24 No. 04 (2023): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/eksakta/vol23-iss04/460

Abstract

Melinjo leaves (Gnetum gnemon) have been used traditionally in Maluku to treat spoilage in the fish product. Melinjo leaves contain secondary metabolites with anti-inflammatory and antibacterial biological activities. It has been identified contain gnetumal, callyspinol, cassipuorol, (+)-dehydrovomifoliol, p-coumaric acid, ferulic acid, isovitexin, swersitin, isoswersitin, vicenin 2, swertiajaponin, isoswertiajaponin and ursolic acid. This research aims to predict the potential of the compounds in melinjo leaves as antihistamines by inhibiting the activity of the acetylcholine muscarinic M3 receptor. The research was carried out using an in silico study method using a molecular docking approach. Docking results showed that gnetumal, callyspinol, cassipuorol, (+)-dehydrovomifoliol, p-coumaric acid, ferulic acid, isovitexin, swersitin, isoswersitin, vicenin 2, swertiajaponin, isoswertiajaponin and ursolic acid for the muscarinic acetylcholine receptor M3 had a binding affinity value of -7.4, -8.0, 7.0, 7.0, -6.6, -6.6, -7.4, -5.7, -4.4, -3.7, -6.0, -4.9 and -4.7 kcal/mol, respectively.
Isolation of Carrageenan from Eucheuma cottonii by Variying Alkaline Solutions Gaspersz, Nelson; Tanasale, Matheis F. J. D. P.; Malle, Dominggus; Kafara, Zulvia Astrianti
Indonesian Journal of Chemical Research Vol 12 No 3 (2025): Edition for January 2025
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2025.12-gas

Abstract

The carrageenan can be isolated by combining alkaline KOH, NaOH, and Ca(OH)2 solutions. Alkaline solutions of KOH: NaOH, KOH: Ca(OH)2, and NaOH: Ca(OH)2 were combined to extract carrageenan. The amount of the solution was varied, the carrageenan groups were characterized using FTIR, and the carrageenan’s gel strength was tested. The extraction results obtained the highest yield in the combination of alkaline solutions Ca(OH)2 80%+KOH 20%, which is equal to 70.18% FTIR test results for carrageenan produced from the extraction of Eucheuma cottonii seaweed showed absorption showing the type of kappa (κ) carrageenan. The highest gel strength test results were obtained in an alkaline solution of Ca(OH)2 80%: NaOH 20%, which was 252.5 g bloom, and the lowest was made in a solution of Ca(OH)2 80%: KOH 20%, which was 21.0 g bloom.
The Sediment Profile and Heavy Metal Content of Lead (Pb), Copper (Cu), and Silver (Ag) in The Waters of Saparua Island Anakotta, Jaicson G.; Male, Yusthinus T.; Sekewael, Serly J.; Gaspersz, Nelson
Indonesian Journal of Chemical Research Vol 12 No 3 (2025): Edition for January 2025
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2024.12-ana

Abstract

This study determined the distribution levels of heavy metals Pb, Cu, and Ag in sediments in the waters of Saparua Island. It characterized the sediments in the seas of Saparua Island. Parameters are physical and chemical parameters of waters, determination of total organic carbon (TOC), and digestion of sediment samples for SSA testing. The results obtained levels of copper metal contained in the sediments from 0.1583–1.9531 mg/L and <4–78 ppm. The level of lead metal contained in the sediments in the waters of Saparua Island ranges from <12–26 ppm. Metal oxides, especially metal oxides formed from Cu, were found in sediments in the waters of Saparua Island with location points P.8 and P.9, namely CuO 0.0056% and 0.0031% and in sediments in Saparua Island waters with a value of 2Ɵ in sediment samples. P.2, P.3, P.6, P.8, P.9, and P.11 have the highest intensity which is the characterization of metal oxide 2Ɵ= 27.7464°, 29.4759, 26.2979, 26.6686, 26.7007, and 24.3695 indicate the presence of CaO (calcium oxide) phases at points P.2, P.3, and P.6. the SiO2 (silica) phase which is the most abundant metal in sediment samples P.8, P.9, and P.11 based on the XRF test.
PELATIHAN PENGEMBANGAN PRODUK BERBAHAN DASAR REMPAH KHAS MALUKU BAGI KELOMPOK BAKOPEL JEMAAT BETHANIA Gaspersz, Nelson; Malle, Dominggus; Pattiasina, Priska Marisa; Sri, Dewi
Kumawula: Jurnal Pengabdian Kepada Masyarakat Vol 6, No 1 (2023): Kumawula: Jurnal Pengabdian Kepada Masyarakat
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/kumawula.v6i1.40312

Abstract

Tanaman rempah yang terkenal dari daerah Maluku di antaranya pala, kayu putih, dan cengkeh. Kandungan senyawa kimia tanaman rempah menjadikannya memiliki aroma yang khas dengan beragam manfaat serta nilai jual yang tinggi. Akan tetapi, pemanfaatan tanaman rempah sejauh ini belum maksimal terutama dari segi pendapatan masyarakat lokal. Oleh karena itu, perlu dilakukan inovasi untuk meningkatkan nilai ekonomis dari tanaman tersebut bagi masyarakat. Hal ini dapat dilakukan melalui pelatihan pengembangan produk berbahan dasar rempah bagi ibu-ibu kelompok Bakopel Jemaat Bethania, Kelurahan Uritetu, Kecamatan Sirimau, Kota Ambon. Pelaksanan kegiatan pengabdian dimulai dengan eksperimen laboratorium, pelatihan pembuatan produk sabun dan lilin aroma rempah, dan promosi awal produk. Hasil yang diperoleh ibu-ibu belajar dan berlatih secara langsung pembuatan sabun dan lilin aroma terapi dengan menggunakan bahan dan peralatan yang dapat diperoleh di toko atau swalayan terdekat. Ibu-ibu juga diberikan penjelasan terkait proses pengemasan produk serta teknik pemasaran yang baik dan benar. Produk sabun dan lilin yang berhasil dibuat kelompok bakopel pasca pelatihan juga dipromosikan pada kegiatan Amboina Farmers Market di Lapangan Merdeka Ambon yang khusus memamerkan produk UMKM. Kegiatan pengabdian kepada masyarakat ini diharapkan dapat terus dilanjutkan melalui pendampingan secara berkala sebelum kelompok ini bisa mandiri.
Co-Authors Amos, Matthew Adi Honey Anakotta, Jaicson G. Anancy Reza Ngarbingan Arpipi, Henderika S. S. Baharudin, Muh. Daswar A. Bandjar, A. Bandjar, Adriani Bijang, Catherina Manukpadang Dewi Sri Dolaitery, Lois Mikhal DOMINGGUS MALLE Dwi Anggara Putri Usman, Dwi Anggara Putri Eirene Grace Fransina El, Rahma Erwin Ubwarin Fensia Analda Souhoka Fransina, Eirene G. Hasanela, Nurani Hattu, Nikmans Hellna Tehubijuluw Herland Satriawan I Wayan Sutapa Indrid Harjuni Insun Sangadji Ivonne Telussa Jacobus Cliff Diky Rijoly Kafara, Zulvia Astrianti Kapelle, Imanuel B. D. Karnelasatri Karnelasatri Lakoan, Milda Rianty Landu, Sartika Latupeirissa, Jolantje Leuwol, Dean Y.E. Male, Yusthinus Tobias Manukpadang Bijang, Catherina Mario R. Sohilait Matthew Adi Honey Amos Pattiasina, Priska M. Pattiasina, Priska Marisa Priska Marisa Pattiasina Priska Marissa Pattiasina R, Irwan Rahayu . Rahayu Rahayu Rahayu Rahayu Rosita Silaban Rosmawaty Harahap Salmawati, Mimi Sanawain, Lea Sekewael, Serly J. Sekewael, Serly Jolanda Semuel Simra Pada Seumahu, Cecelia Anna Shielda Natalia Joris Siahaya, Antho Netty Siahaya, Anto Netty Sitti Hardiyanti Kalauw Sohilait, Mario Sohilait, Mario R. Sohilait, Mario Rowan Sohilait, Stephanie Pascal Sri, Dewi Tahya, Candra Yulius Tanasale, Matheis F. J. D. P. Yusthinus T. Male