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All Journal Biota: Jurnal Ilmiah Ilmu-Ilmu Hayati IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Science and Technology Indonesia Jurnal Penelitian Sains IJEMS (Indonesian Journal of Environmental Management and Sustainability) QARDHUL HASAN: MEDIA PENGABDIAN KEPADA MASYARAKAT Berkala Penelitian Hayati Sriwijaya Bioscientia Jurnal Altifani Penelitian dan Pengabdian kepada Masyarakat BIOVALENTIA: Biological Research Journal Jurnal Pepadu Jurnal Manusia dan Lingkungan
Elisa Nurnawati
Biology Department, Faculty Of Mathematics And Natural Sciences, Sriwijaya University, Indonesia
Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Energy Environmental Science Immunology & microbiology Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Nursing Physics Public Health Social Sciences Other

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Adsorption and Photocatalytic Activity of Bentonite–Titanium Dioxide on The Degradation of Methylene Blue Dyes Muhammad Said; Niko Erlangga; Daniel Alfarado; Suheryanto Suheryanto; Elisa Nurnawati
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 8, No 3 (2023): October 2023
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v8.i3.126

Abstract

The aim of this research is to determine the effect of bentonite-Titanium dioxide (Benonite-TiO2) composite on the degradation process of methylene blue. It was carried out by synthesizing the composite through the impregnation of Titanium dioxide (TiO2) on bentonite and then characterizing the obtained compound using XRD and SEM-EDX. The results of the XRD characterization showed that there was a shift in the diffraction angle (2θ), which indicated the success of the impregnation procedure. The morphology of the composite showed that the bentonite surface had been filled with TiO2, as evidenced by the results of the EDX analysis, which showed a 7.03% increase in Titanium. Furthermore, the degradation process was carried out using various variables, including contact time, the ratio of composite weight to dye, and by irradiation with a UV lamp at a wavelength of 352 nm UV. It was discovered that the best degradation in the concentration of methylene blue occurred at a maximum contact time of 90 minutes and at a maximum weight of 10 mg of benonite-TiO2, with an effectiveness of 99.91% after irradiation and 92.26% without irradiation.
CELLULASE ACTIVITY OF RIZOSFER BACTERIA OF KETAPANG PLANTS (Terminalia catappa L.) Rosmania, Rosmania; Widjajanti, Hary; Nurnawati, Elisa
BIOVALENTIA: Biological Research Journal Vol. 9 No. 2 (2023)
Publisher : Biology Department, Faculty of Mathematics and Natural Sciences, Sriwijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24233/biov.9.2.2023.403

Abstract

Cellulose, a natural biopolymer produced by plants, undergoes enzymatic breakdown by cellulase, cleaving the monomer's β-1,4 glycosidic bonds. Cellulolytic bacteria, producers of cellulase, can be isolated from plant rhizospheres, like Ketapang (Terminalia catappa L.), abundantly found in the Biology Department at Universitas Sriwijaya, South Sumatra, Indonesia. This study aimed to isolate cellulolytic bacteria from Ketapang rhizosphere soil and assess their cellulase activity. The spread plate method on selective Carboxy Methyl Cellulose Agar (CMC agar) was used for bacterial isolation, and cellulase activity was measured using the DNS method (3.5-dinitro salicylic acid). Results yielded 22 isolates of cellulolytic bacteria capable of growth on selective CMC agar. Thirteen isolates, identified through a screening test, produced cellulase, forming clear zones post-addition of 0.1% Congo Red and 1 M NaCl. Cellulolytic activity indices for these isolates ranged from 0.02 to 2.6 mm. The highest indices (IAS) and cellulase activities were observed in BS10, BS4, and BS22, with IAS values of 2.64, 2.12, and 1.71, and cellulase activities of 354.99 U/ml, 9.42 U/ml, and 9 U/ml, respectively. Identification results suggested that isolate BS10 bore similarities to the genus Zoogloea, while isolates BS4 and BS22 showed similarities to the genus Bacillus.
Inovasi Makanan Berbasis Labu Kuning Untuk Peningkatan Kesejahteraan Masyarakat Petani Di Desa Pulau Semambu Kecamatan Indralaya Utara Kabupaten Ogan Ilir Aminasih, Nita; Widjajanti, Haryati Ahda; Nurnawati, Elisa; Harmida, Harmida; Sarno, Sarno
Jurnal Altifani Penelitian dan Pengabdian kepada Masyarakat Vol. 4 No. 1 (2024): Januari 2024 - Jurnal Altifani Penelitian dan Pengabdian kepada Masyarakat
Publisher : Indonesian Scientific Journal

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59395/altifani.v4i1.502

Abstract

Desa Pulau Semambu adalah sebuah desa di Kecamatan Indralaya Utara, Kabupaten Ogan Ilir yang memiliki mayoritas masyarakatnya berprofesi sebagai petani. Salah satu komoditi pertanian yang banyak dibudidayakan adalah labu kuning. Namun sayangnya pemanfaatan dari labu kuning masih belum dilakukan secara optimal karena hanya dijual dalam bentuk segar atau diolah menjadi makanan yang terbatas jenisnya. Pelatihan dilakukan dengan cara melakukan paparan atau presentasi secara langsung serta mendemonstrasikan cara pengolahan labu kuning menjadi makanan yang lezat dan menarik kepada target sasaran berupa ibu-ibu dan remaja putri. Pelatihan ini diharapkan mampu meningkatkan pendapatan masyarakat petani melalui inovasi pembuatan makanan berbasis labu kuning.
Adsorption Study on Phenol from Bentonite doped with Zinc oxide: Synthetis, Characterization, Equilibrium, Kinetics, and Thermodynamic Desnelli, Desnelli; Rizkiani, Delisa; Alfarado, Daniel; Ferlinahayati, Ferlinahayati; Yohandini, Heni; Fatma, Fatma; Mara, Ady; Suheryanto, Suheryanto; Nurnawati, Elisa; Hamidah, Afreni; Said, Muhammad
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 9, No 2 (2024): June 2024
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v9.i2.82

Abstract

This study modified current bentonite with zinc oxide (ZnO) and investigated the performance of phenol adsorption. The material bentonite-ZnO was successfully synthesized and characterized with X-ray diffraction (XRD), scanning electron microscopy-energy dispersive X-ray (SEM-EDX), and Fourier transform infrared (FT-IR). The adsorption performance was determined by adsorption equilibrium, kinetics, and thermodynamic parameters. The adsorption, kinetic, and thermodynamic parameters were compared alternatively. The phenol adsorption capacity was obtained from Langmuir and Freundlich adsorption isotherm models, which for bentonite-ZnO was fit with both isotherm models (Langmuir R2 = 0,997 and Freundlich R2 = 0,9515) and was favorable than activated bentonite (n value bentonite-ZnO = 2.389; activated bentonite = 0,898). A kinetic model was tested with pseudo-first-order, pseudo-second-order, and intraparticle diffusion models which bentonite-ZnO and activated bentonite fit in the pseudo-second-order with an excellent agreement (R2 = 0,999). Several thermodynamic parameters such as enthalpy, Gibbs free energy, and bentonite-ZnO have an entropy more than zero (ΔS = 0.008 J/molK), which demonstrated the feasibility and spontaneity (ΔG < 0) and endothermic nature (ΔH = 3,056 kJ/mol) of the phenol adsorption process. Several thermodynamic parameters such as enthalpy, Gibbs free energy, and bentonite-ZnO have an entropy more than zero (ΔS = 0.008 J/molK), which demonstrated the feasibility and spontaneity (ΔG < 0) and endothermic nature (ΔH = 3,056 kJ/mol) of the phenol adsorption process. Based on the result data in this article, modified bentonite with ZnO has increased the ability for phenol adsorption than currently activated bentoniteKeywords: bentonite, adsorption equilibrium, adsorption kinetics, thermodynamics model, phenol, bentonite-ZnO
Antidiabetic Activity of Endophytic Fungi Extract from Leaves of Kembang bulan (Tithonia diversifolia (Hemsley) A. Gray) Through α-Amylase Enzyme Inhibition Putri, Hanindita Alifia; Elisa Nurnawati; Widjajanti, Hary
Science and Technology Indonesia Vol. 10 No. 2 (2025): April
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2025.10.2.350-359

Abstract

Diabetes mellitus is a serious health problem with an increasing number of sufferers. In this context, an important method for controlling blood sugar levels is the derivation of α-amylase enzyme inhibitors from natural materials such as endophytic fungi. Therefore, this research aimed to analyze the potential of endophytic fungi from Tithonia diversifolia leaves as α-amylase enzyme inhibitors, secondary metabolites, as well as the character and identity of potential endophytic fungi. The stages included isolation and identification of endophytic fungi, extraction of secondary metabolites, α-amylase inhibition tests, analysis of bioactive compounds using Thin Layer Chromatography (TLC), and identification of potential endophytic fungi. The results showed that DT3J1 (67.83 µg/mL), DM3J1 (69.36 µg/mL), DT2J2 (80.42 µg/mL), and DT4J1 (88.64 µg/mL) of the eight endophytic fungi isolates reported high potential as inhibitors of the α-amylase enzyme, with IC50 values ​classified as strong. Potential fungal extracts contain bioactive compounds such as alkaloids, flavonoids, phenols, and terpenoids. Meanwhile, molecular identification showed that potential endophytic fungi consisted of Curvularia pseudointermedia, Diaporthe passifloricola, Nodulisporium verrucosum, and Muyocopron laterale species. This research also provided scientific evidence on the potential of the endophytic fungus Tithonia diversifolia as a candidate for antidiabetic drugs.
Permainan Edukatif Berbasis Lingkungan Sebagai Upaya Perkembangan Kognitif dan Motorik Bagi Siswa Sekolah Dasar Yuliza, Evi; Cahyono, Endro Setyo; Nurnawati, Elisa; Puspita, Fitri Maya; Indrawati; Octarina, Sisca
Qardhul Hasan: Media Pengabdian kepada Masyarakat Vol. 11 No. 2 (2025): Qardhul Hasan: Media Pengabdian kepada Masyarakat
Publisher : Universitas Djuanda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30997/qh.v11i2.19274

Abstract

Permainan edukatif adalah bentuk permainan yang dirancang untuk memberikan pengalaman belajar yang lebih mendalam dalam proses belajar. Pengabdian ini bertujuan untuk meningkatkan perkembangan kognitif dan motorik siswa SD melalui permainan edukatif berbasis lingkungan. Pembelajaran berbasis lingkungan memberikan manfaat lain yaitu membuat materi pelajaran terasa lebih nyata dan mudah diterima. Metode yang digunakan dalam kegiatan ini bersifat edukatif, yakni mengandung unsur-unsur pembelajaran yang memotivasi siswa untuk berkembang ke arah yang diharapkan. Permainan edukatif berbasis lingkungan yang direkomendasikan pada siswa SD meliputi permainan harta karun, permainan tebak-tebakan dan permainan ular tangga. Kegiatan pengabdian menunjukkan bahwa siswa dapat meningkatkan kemampuan kognitif seperti pemahaman mengenai perbedaan sampah organik dan anorganik, serta keterampilan motorik melalui aktivitas fisik dalam permainan. Selain itu, permainan ini juga efektif dalam mempererat hubungan sosial antar siswa, meningkatkan kerjasama dalam kelompok, dan menciptakan suasana belajar yang menyenangkan.
Co-Authors Ady Mara, Ady Afreni Hamidah Agung Bimantara Alfarado, Daniel Ali Djamhuri Andika Puspita Dewi Asiandu, Angga Puja Christina Vivid Handayani Daniel Alfarado Desnelli Desnelli Desnelli Desnelli Eca Desriana Zahwa Eka Amelia Elfita Elfita Endro Setyo Cahyono, Endro Setyo Erni Martani Erni Martani Erni Martani Evi Yuliza Evi Yuliza, Evi Fatma Ferlinahayati Ferlinahayati Fitri Maya Puspita Fitri Maya Puspita Fitrya Fitrya Harmida Harmida Harmida Harmida Harry Widjajanti Hary Widjajanti Hary Widjajanti Hary Widjajanti Hary Widjajanti Heni Yohandini Heni Yohandini Indrawati Indrawati Jurnal Pepadu Laila Hanum Langkah Sembiring LANGKAH SEMBIRING M.Ridha Mauludi Mardiyanto Mardiyanto Maulida Harwati Mega Tiara Muhammad Said MUHAMMAD SAID Muharni Muharni Muharni Muharni Muharni Muharni Mustafa Kamal Niko Erlangga Nina Tanzerina Nita Aminasih Nurkayah, Nurkayah Poedji Loekitowati Hariani Putra Bahtera Jaya Bangun Putri, Hanindita Alifia Rizkiani, Delisa Robinson Sitepu Rosmania, Rosmania Salni Salni Sarno Sarno Sarto Sarto Sarto Sebastian Margino Sebastian Margino Sebastian Margino Sisca Octarina Siti Alharzsa Suheyanto Suheryanto Sutandar, Vivi Hendra Umi Kalsum Widjajanti, Haryati Ahda