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All Journal Chemistry Indonesian Journal of Chemical Research 2-TRIK: TUNAS-TUNAS RISET KESEHATAN Jurnal Inovasi Pendidikan dan Sains Global Health Science (GHS) Biofaal Journal Jurnal Warta Desa (JWD) Innovation for Community Service Journal Jurnal Akademika Kimia
Hasanela, Nurani
Department Of Chemistry, Faculty Mathematics And Natural Sciences, Pattimura University, Jl. Ir. M. Putuhena, Ambon, 97233, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Dentistry Education Engineering Environmental Science Health Professions Materials Science & Nanotechnology Medicine & Pharmacology Nursing Physics Public Health Social Sciences Other

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Journal : Chemistry Indonesian Journal of Chemical Research

 1 
Karakterisasi Biopolimer Kitosan Hasil Deasetilasi Limbah Kepiting Rajungan (Portunus Sanginolentus) Menggunakan NaBH4 Dalam NaOH Hasanela, Nurani; Tanasale, Matheis F.J.D.P.; Tehubijuluw, Helna
Indonesian Journal of Chemical Research Vol 8 No 1 (2020): Edisi Bulan Mei (Edition for May)
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2020.8-nur

Abstract

The chitosan isolation from crab crab waste (Portunus sanginolentus) has been carried out. Chitin production is carried out by the de-proteination, demineralization and depigmentation processes. Chitosan biopolymer is produced from chitin through de-acetylation method using base solution (NaOH) and the addition of NaBH4 which aims to increase the degree of de-acetylation (DD) of chitosan. The results of 25 g of chitin obtained chitosan amounted to 16.67 g (66.68%). Chitin and Chitosan were identified by a Fourier Transform Infrared (FT-IR) spectrophotometer.
Kinetics and Isotherm Study of Ion Phosphate Adsorption by Lontor Natural Clay Ikhsan, Nurul; Sekewael, Serly J; Hasanela, Nurani
Indonesian Journal of Chemical Research Vol 9 No 3 (2022): Edition for January 2022
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598//ijcr.2022.9-ikh

Abstract

The clay used taken from Lontor Village, Central Maluku Regency, Banda Besar Island. The clay was activated at 350 °C for 3 hours using a furnace. This study aims to determine the effectiveness of physically activated Lontor natural clay in reducing levels of phosphate ions using the adsorption method. The adsorption capacity of clay is determined based on two parameters. The parameters are the optimum contact time used are 2, 3, 4, 5, and 6 hours and variations of the concentration are 10, 20, 30, 40, and 50 mg/L of phosphate. The concentration of phosphate adsorbed on the clay was measured by a UV-Vis spectrophotometer at a wavelength of 665 nm. The results showed that the optimum conditions for the adsorption of phosphate ions by Lontor natural clay were obtained at the contact time of 5 hours and the concentration of 40 mg/L. The adsorption of phosphate ions by Lontor activated natural clay followed the pseudo-second-order Lagergren adsorption kinetics model with a rate constant value (k2) of 3.39 x 10-1 g mg-1 min-1, and following the Freundlich adsorption isotherm models with a correlation coefficient (R2), Freundlich constant (Kf), and n values, respectively are 0.9513; 0.57 mg1-1/n L1/n/g, and 0.40 g/L.
Effect of Heating Coarse Extract of Brown Macroalgae (Padina australis) from Tial Waters, Salahutu District, Central Maluku Regency on Antioxidant Activity Hasanela, Nurani; Souhoka, Fensia Analda
Indonesian Journal of Chemical Research Vol 10 No 2 (2022): Edition for September 2022
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598//ijcr.2022.10-nur

Abstract

Physical and chemical factors influence antioxidant activity. One of the physical factors that can affect antioxidant activity is heat. This study aims to determine the phytochemical content and the effect of heating the crude extract of marine macroalgae Padina australis on antioxidant activity. The research method used, namely maceration using methanol as a solvent to obtain a crude extract, then evaporation of the solvent at a temperature of 45 °C. Furthermore, phytochemical tests were carried out, characterization using TLC and UV-Vis spectrophotometer, and determination of free radical scavenging activity of DPPH. The results of the phytochemical test showed that the crude extract of Padina australis was positive for bioactive compounds, namely saponins, alkaloids, terpenoids, steroids, and flavonoids. Characterization by TLC and UV-Vis spectrophotometer showed the presence of secondary metabolites, namely chlorophyll a and carotenoids. The use of temperature in the solvent evaporation process affects the stability of bioactive compounds and secondary metabolites. The results of the antioxidant activity test (IC50) of the crude extract of Padina australis against DPPH obtained 163 ppm, so it is classified as an antioxidant in the medium category.
Phytochemical Tests and Antioxidant Activities of the Rhips Ginger (Zingiber Officinale Var Amarum.) Hasanela, Nurani; Bandjar, Adriani; Yanyaan, Virenze K.; Hitijahubessy, Hendro
Indonesian Journal of Chemical Research Vol 11 No 2 (2023): Edition for September 2023
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598//ijcr.2023.11-nur

Abstract

Ginger is a traditional plant that thrives and has essential functions, including an antioxidant. This study aimed to determine the phytochemical content and test the antioxidant activity of fresh white ginger and powdered ginger (Zingiber officinale var. Amarum.). Two methods are used in this research: the phytochemical test and the antioxidant activity test using DPPH. Phytochemical tests, such as flavonoid, phenolic, steroid, and saponin, were conducted qualitatively. The antioxidant activity test was carried out using a UV-Vis spectrophotometer. Fresh white ginger and powdered ginger were extracted using the maceration method with water solvent. The study results showed that the effects of fresh white ginger extract obtained a yield of 64.08%. Meanwhile, powdered ginger extract was 58.68%. Phytochemical test results of fresh white ginger extract and powdered ginger (commercial) showed positive results for flavonoid, phenolic, and saponin compounds while adverse effects for steroids. Antioxidant activity test on fresh white ginger extract with water solvent showed an IC50 value of 25.41 ppm. The powdered ginger extract (commercial) has an IC50 value of 36.70 ppm. The results showed fresh white ginger and powdered ginger had relatively high antioxidant activity.
Antibacterial Activity Test of Silver Nanoparticle Composites With Gandaria Seed (Bouea macrophylla G.) Bioreductor and Ouw Natural Clay Matrix (ONC) Bijang, Catherina M.; Hasanela, Nurani; Joris, Shielda N.; Lihi, Risma; Salmawati, Mimi
Indonesian Journal of Chemical Research Vol 13 No 1 (2025): Edition for May 2025
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2025.13-cat

Abstract

An antibacterial activity test of silver nanoparticle composite with bioreductor of gandaria seeds (Bouea macrophylla G.) and Ouw natural clay (ONC) matrix was conducted. Silver nanoparticles (AgNPs) were synthesized by forming the colloidal silver solution by chemical reduction method using gandaria seed bioreductor. The formation of AgNPs can be known through UV-Vis absorption when there is a color change. Based on the results, the maximum wavelength of colloidal NPP is 435-444 nm. Silver nanoparticles synthesized through the preparation process were tested to determine their effectiveness as antibacterial agents against Escherichia coli and Staphylococcus aureus. The test results showed that the NPP formulation, containing an aqueous extract of gandaria seeds with the addition of polyvinyl alcohol (PVA), produced an inhibition zone of 10.6 mm against E. coli, indicating strong antibacterial activity. In contrast, the activity against S. aureus was classified as moderate, with an inhibition zone measuring 6.8 mm. For the antibacterial activity test with Ag/ONC nanocomposite samples on both test bacteria, there was no inhibition zone or antibacterial activity.
Co-Authors A. N. Siahaya A. Netty Siahaya Asih D. Azril Mahulauw Bandjar, Adriani Bijang, Catherina M. Bijang, Catherina Manukpadang Catherina M. Bijang E. G. Fransina Fensia Analda Souhoka Fransina, Eirene G. Gaspersz, Nelson H. J. Sohilait Hellna Tehubijuluw Hendro Hitijahubessy I Wayan Sutapa Ibrahim Karmila Fitri Idham Olong Ivonne Telussa Jalmaf, Welda Kristiyanti Joris, Shielda N. Kapelle, Imanuel B. D. LAURY CHARA HUWAE Lihi, Risma Maahury, Mirella Fonda Marsela Laratmase Matheis F.J.D.P. Tanasale Nurul Ikhsan Pattiasina, Priska Marisa Priska Marissa Pattiasina Rahayu Rahayu Rahayu Rahayu Rosita Silaban Rosmawaty Harahap Rutu, Irwan Salmawati, Mimi Samid, Aprianti Sapulete, Sisca Madona Sasol Z Sekewael, Serly J Sohilait, Mario Rowan Sri, Dewi Tahril Tehuayo, Ahmadin Tehubijuluw, Helna THAMRIN AZIS Y. T. Malle Yanyaan, Virenze K.