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All Journal Jurnal Ilmu Dasar Jurnal Sains Materi Indonesia Sains Tanah JURNAL PIJAR Journal of Mathematical and Fundamental Sciences Science and Technology Indonesia Jurnal Pengabdian Magister Pendidikan IPA Molekul: Jurnal Ilmiah Kimia Indonesian Physical Review Acta Chimica Asiana Jurnal Pijar MIPA Jurnal Pepadu Jurnal Pendidikan dan Pengabdian Masyarakat BIO-CONS: Jurnal Biologi dan Konservasi Molekul: Jurnal Ilmiah Kimia Jurnal Sains Materi Indonesia
Nurul Ismillayli
Department Of Chemistry, Faculty Of Mathematics And Fundamental Sciences, University Of Mataram, Jalan Majapahit No.62, Mataram 83125, Nusa Tenggara Barat
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Interaksi Asam Humat Dengan Larutan Urea, SP36 dan KCl dan Pengaruhnya Terhadap Efisiensi Pemupukan Nurul Ismillayli; Siti Raudhatul Kamali; Saprini Hamdiani; Dhony Hermanto
Jurnal Pijar Mipa Vol. 14 No. 1 (2019): Maret
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1042.511 KB) | DOI: 10.29303/jpm.v14i1.815

Abstract

Telah dilakukan studi interaksi asam humat dengan larutan urea, super fosfat 36 (sp36), dan kalium klorida (KCl) dengan menggunakan metode spektrofotometri Infra Red (IR). Penggunaan asam humat diketahui dapat meningkatkan ketersediaan, pengambilan nutrien pada tanaman dan efisiensi pemupukan urea, SP36 dan KCl. Akan tetapi, gugus fungsi asam humat yang berperan pada interaksi dengan pupuk belum dikaji. Penelitian dilakukan dengan menginteraksikan asam humat dan larutan pupuk urea, SP36 dan KCl dengan perbandingan massa 1:5. Interaksi asam humat dengan ketiga pupuk diketahui dengan membandingkan spektra IR asam humat murni dengan asam humat setelah bereaksi dengan ketiga pupuk. Adanya pergeseran serapan bilangan gelombang mengindikasikan terjadi interaksi. Pengaruh penambahan asam humat pada efisiensi pemupukan dilakukan dengan menghitung kadar nitrogen, fosfor dan kalium pada sampel tanaman jagung menggunakan metode Kjehdahl dan spektrofotometri UV-Vis. Hasil karakterisasi dengan spektrofotometer Fourier Transform Infra Red (FTIR) menunjukkan bahwa struktur hipotetik asam humat memiliki gugus fungsional –OH, alifatis, eter, aromatis dan karboksilat. Interaksi asam humat dengan ketiga pupuk terjadi pada gugus fenol, aromatis dan karboksilat yang ditunjukkan dengan adanya pergeseran serapan pada daerah 3421 cm-1,  1611 cm-1dan 1375 cm-1. Penambahan asam humat pada pemupukan dasar dapat meningkatkan efisiensi pemupukan.
Determination of Glucose with Cellulose Acetate/Glucose Oxidase Modified Carbon Paste Electrodes Rochmad Kris Sanjaya; Datin An Nisa Sukmawati; Nurul Ismillayli; Dhony Hermanto
Molekul Vol 16, No 3 (2021)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (237.705 KB) | DOI: 10.20884/1.jm.2021.16.3.679

Abstract

An amperometric biosensor for glucose determination was developed using a carbon paste electrode (CPE) modified with cellulose acetate (CA)/glucose oxidase (GOx) bilayer membrane through the electrostatic interaction between them. The CA membrane was used as matrix for enzyme immobilization via microencapsulation technique, is enzyme placed between two membranes. CA/GOx membrane was attached to CPE surface containing ferrocene (Fc). By using proposed amperometric biosensor, glucose concentration was determined as well as its characteristic. The modified Fc–graphite electrode with CA/GOx bilayer membrane for glucose had optimum measurement conditions at work emf of 874 mV, CA concentration of 10% and amount Fc of 0.021 mg. The biosensor showed good performance at glucose concentration range of 0.05–3 mM and limit of detection was 0.024 mM. Proposed biosensor has good reproducibility with relative standard deviation (RSD) was less than 5% up to 7 times use (in the defined condition 4 ˚C). Glucose measurement result in human serum of diabetes mellitus patients showed conformity with result of reference method, MediSense Optium glucose test kit.
Synthesis of Biodegradable Superabsorbent Polymers from Carboxymethyl Cellulose/Humic Acid Nurul Ismillayli; Siti Raudhatul Kamali; Surya Hadi; Dhony Hermanto
Acta Chimica Asiana Vol. 2 No. 2 (2019)
Publisher : Chemistry Education Program, the University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (197.828 KB) | DOI: 10.29303/aca.v2i2.8

Abstract

Superabsorbent polymer (SAP) blend has been synthesized from carboxymethyl cellulose (CMC), humic acid, and aluminum sulphate octadecahydrate cross-linker. SAP is hydrophilic networks that can absorb and retain huge amount of water within their structures. Humic acid as starting material of polymer, was isolated from subgrade Batujai Dam by using IHSS method. Water Absorption Capacity (WAC) measurement, FTIR analysis, and agitation tests to investigate the cross-linking process and which of Al3+ and SO42- ions causes the crosslinking are carried out. Optimum cross-linking ratio of CMC and cross-linker appeared to be 2wt% corresponded to WAC determination. FTIR spectrum of CMC/humic acid blend and agitation test showed that CMC react with humic acid during polymerization process via Al3+ ion. Keywords: carboxymethyl cellulose; Al3+ ion; humic acid; superabsorbent polymer.
Synthesis Of Mesoporiic Silica From Rice Husk Ash For Pinostrobin Based Drug Delivery Rifia Wulandari; Saprini Hamdiani; Nurul Ismillayli
Acta Chimica Asiana Vol. 2 No. 1 (2019)
Publisher : Chemistry Education Program, the University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/aca.v2i1.20

Abstract

A study has been conducted on the synthesis of mesoporous silica as introductory material pinostrobin anticancer compounds. The aim of this study was to synthesis paramagnetic mesoporous silica from rice husk ash waste; knowing the characteristics of silica gel and mesoporous silica from rice husk and the value of adsorption capacity (Q). Based on the results of the study, it was found that mesoporous silica can be synthesized from the rice husk ash waste. Characterization using FTIR produces silanol (Si-OH), and siloxan (Si-O-Si). The use of 30% w/w tartaric acid as a template doesn’t change the functional groups of silica. The optimum conditions of adsorption of pinostrobin compounds by mesoporous silica at the adsorption capacity of 7.049 mg/g. In simulated intestinal fluids (pH 7.4),pinostrobin is released slowly at every hour, then slightly increases at the 10th hour and continues to increase again slowly so that the pinostrobin compound is completely released at 12 hours.
Validation of Mercury Speciation Analysis in River Around Artisanal Small-Scale Gold Mining Area in West Nusa Tenggara, Indonesia Dhony Hermanto; Nurul Ismillayli; Nindi Herdiyanti; Siti Raudhatul Kamali; Soraya Aulia
Science and Technology Indonesia Vol. 7 No. 3 (2022): July
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (718.095 KB) | DOI: 10.26554/sti.2022.7.3.379-384

Abstract

A method for determining mercury concentration using a mercury analyzer in a river water sample was validated according to ISO/IEC 17025. Analytical performance including linear range, limit of detection, precision and accuracy were evaluated. Mercury speciation profile was obtained from Pelangan River at three areas within Dusun Rambut Petung, an area with the highest amount of artisanal small-scale gold mining (ASGM) in Lombok, West Nusa Tenggara. Then, their concentration in each species was measured using sequential extraction. Good curve linearity was obtained in the concentration range of 0.1-5.0 µg/L and the limit of detection was 0.014 µg/L. The developed method has good precision and accuracy with a RSD value <10% and a recovery of 94.16-101.91%. The detected fraction of mercury in the Pelangan river is organomercury, elemental mercury, and sulfide-bound species with each concentration of 0.732±0.032; 0.350±0.027; and 0.850±0.027 µg/L, respectively. The measurement results showed conformity with the reference method using CV-AAS. Therefore, this method can be applied to determine mercury levels in water for monitoring environmental quality.
Conducting Matrices of the Poly(-O-Toluidine, PTOL) Film for Immobilizing Uricase Dhony Hermanto; Nurul Ismillayli; Ulul Khairi Zuryati; Siti Raudhatul Kamali
Molekul Vol 17 No 2 (2022)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jm.2022.17.2.5851

Abstract

Polyaniline, PANI as conducting polymer has been used as enzyme immobilization matrix in biosensors due to its excellent stability and electrochromic effects, conductivity, and redox reversibility. However, at pH above 4, the electron transfer ability and redox activity decrease, henceit is necessary to modify the PANI structure to increase the PANI pH range. In this study, the PANI derivative, the poly(-o-toluidine, PTOL) film was produced for the uricase immobilization matrix. This study aimed to develop a supporting material that maintains catalytic activity uricase with a facile and inexpensive procedure. The PTOL was prepared by using the chemical oxidative polymerization technique with ammonium persulfate (dissolved in 1.0 M HCl) as an oxidizing agent. The FTIR spectra confirmed the success of PTOL formation by the appearance of its characteristic peaks. The UV-Vis spectra indicated that PTOL was in an emeraldine state with a semi-crystalline structure that was shown by its XRD pattern. While, SEM analysis described that the PTOL film was uniform with some granular aggregation in its surface morphology, but there is no holes or porosity were found. The use of PTOL film as a uricase matrix could maintain the uricase activity against the substrate (uric acid, UA) with excellent analytical characteristics. Therefore, PTOL film could be used as conducting matrices for immobilizing enzymes (e.g. biosensors).
Humic Acid Isolation from Batujai Dam Lombok Tengah-NTB and its Potential as Reductive–Biosorbent Au(III) in The Batch System Ismillayli, Nurul; Hermanto, Dhony
Jurnal ILMU DASAR Vol 21 No 1 (2020)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (120.407 KB) | DOI: 10.19184/jid.v21i1.8793

Abstract

The Study of Au(III) ions adsorption by humic acid in batch system has been done. Humic acid was isolated from Batujai Dam Lombok Tengah 0.1 M NaOH and continued with 0.1 M HCl/0.3 M HF washing to dissolve silica. Functional groups of isolated humic acid was investigated by FTIR Spectroscopy and the adsorption process was studied by XRD and SEM analyses. It has been found that humic acid contained carboxylic, phenols, alcoholic, ether, amines functional groups, aliphatic hydrocarbon and aromatic ring. XRD and SEM data showed that humic acid did not only adsorp Au(III) ions but also reduce them to gold particles. Therefore, humic acid has the potential as reductive-biosorbent for Au(III) in batch system. Keywords: humic acid, reductive-biosorbent, Au(III) ions.
PELATIHAN TEKNIK EKSTRAKSI MINYAK SEDERHANA KEPADA UMKM DI PURA LINGSAR KABUPATEN LOMBOK BARAT Hamdiani, Saprini; Hermanto, Dhony; Sudirman, Sudirman; Sumarlan, Iwan; Kamali, Siti Raudhatul; Ismillayli, Nurul; Sari, Ayu Purnama; Iriando, Mahadi Muhammad Gunadharma
Jurnal Pepadu Vol 5 No 3 (2024): Jurnal PEPADU
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/pepadu.v5i3.5879

Abstract

Di Kecamatan Lingsar Kabupaten Lombok Barat terdapat UMKM yang bergerak di bidang produksi Minyak Nagasari. Minyak ini diperoleh dari Tanaman Nagasari yang banyak tumbuh dikawasan Pura Lingsar. Minyak ini memiliki khasiat untuk mengobati penyakit gatal-gatal, sehingga dijadikan oleh-oleh bagi wisatawan yang berkunjung ke tempat wisata tersebut. Namun kualitas minyak masih rendah dan pengemasan masih sangat tradisional. Oleh karena itu, kegiatan ini bertujuan untuk meningkatkan pemahaman para anggota UMKM tentang teknik sederhana ekstraksi minyak dan pengemasan produk. Kegiatan pengabdian dilaksanakan pada tanggal 14 Mei 2024 melalui sosialisasi dan pelatihan dengan metode focus group discussion (FGD). Terdapat 5 kelompok yang masing-masing beranggotakan 3 orang. Tiap kelompok diberi pemahaman dan praktek teknik ekstraksi yang baik. Setelah pelaksanaan pengabdian, pemahaman anggota UMKM meningkat sebanyak 81.25%. Selain pelatihan, para anggota UMKM diberikan pemahaman tentang penggunaan kemasan yang baik akan berpengaruh terhadap keinginan konsumen untuk membeli. Pengemasan yang baik terhadap minyak Nagasari selama periode 3 bulan, Mei-Juni 2024, meningkatkan omzet penjualan Minyak Nagasari sebanyak 37.67%. Kegiatan ini telah meningkatkan pemahaman dan perekonomian para anggota UMKM Minyak Nagasari di Pura Lingsar.
EDUKASI KIMIA DAN MATEMATIKA UNTUK MASYARAKAT PESISIR SEBAGAI LANGKAH AWAL DALAM MENGATASI PENCEMARAN LINGKUNGAN Kamali, Siti Raudhatul; Hermanto, Dhony; Romdhini, Mamika Ujianita; Hamdiani, Saprini; Ismillayli, Nurul; Kurniawati, Lely; Wirahadi, Ahmad; Mariana, Baiq
Jurnal Pendidikan dan Pengabdian Masyarakat Vol. 6 No. 4 (2023): November
Publisher : FKIP Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppm.v6i4.5992

Abstract

Pencemaran limbah di kawasan pesisir adalah tantangan serius yang memerlukan pemahaman mendalam tentang sumber pencemaran, dampaknya, dan solusi yang berkelanjutan. Kegiatan pengabdian ini bertujuan untuk mengatasi masalah ini melalui penerapan pendekatan berbasis kimia dan matematika sebagai media edukasi yang lebih efektif kepada masyarakat pesisir, khususnya masyarakat Pantai Gading yang menjadi mitra kegiatan pengabdian. Pada tahap persiapan, survey lingkungan dilakukan untuk mengidentifikasi sumber-sumber utama pencemaran limbah di wilayah tersebut dan mengetahui pemahaman awal masyarakat tentang pencemaran limbah. Hasil survey ini menjadi dasar untuk merancang program edukasi yang sesuai. Selanjutnya, program edukasi kimia dan matematika dikembangkan dan disampaikan kepada masyarakat pesisir menggunakan metode Focus Group Discussion (FGD) yang melibatkan 18 orang peserta. Hasil dari kegiatan menunjukkan perubahan signifikan dalam pemahaman masyarakat tentang penerapan edukasi kimia dan matematika dalam mengatasi pencemaran limbah serta peningkatan kesadaran mereka dalam mengambil tindakan yang konkret.
CHEMICAL DEGRADATION OF NAFION MEMBRANES UNDER PEMFC AS INVESTIGATED BY DFT METHOD Rochmad K. Sanjaya; Juliandri; Iman Rahayu; Nurul Ismillayli; Dhony Hermanto
Jurnal Sains Materi Indonesia Vol. 21 No. 2 (2020): Jurnal Sains dan Materi Indonesia
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

CHEMICAL DEGRADATION OF NAFION MEMBRANES UNDER PEMFC AS INVESTIGATED BY DFT METHOD. An exsitu method has been developed to performance of Nafion's membrane in PEMFC (Proton Electrolyt Membrane Fuel Cells), caused by the chemical degradation of ·OH and ∙H radicals. The change of the chemical structure occurring during the degradation were primarily calculated of the relative energy of reactions by DFT (Density Functional Theory) method approach in the Gaussian software. This study aims to determine whether DFT method with functional B3LYP, PBEPBE, and B3PW91 and base sets 6-311++G can be used in determining the relative energy of a reaction and knowing the difference in role between ·OH and ∙H in the degradation process of the main chain Nafion with the final group are -CF2H, -CF=CF2 and -COOH. The three functionalities applied showed that the ·OH radical has more role than the ∙H radical in the degradation process of the Nafion main chain. In the -CF2H group was shown the relative energy value of reaction 2 is lower than reaction 5, in the -CF=CF2 group was shown the relative energy value of reaction 8* is lower than reaction 11 and in the -COOH group the relative energ value of reaction 14 is lower than reaction 16. By knowing the relative energy of the Nafion main chain degradation reaction with a certain final group and the role of certain radical compounds in the degradation process, the DFT method with functional B3LYP, PBEPBE and B3PW91 and base sets 6-311++G can recommend various modifications of the Nafion as a fuel cell membrane, particularly in increasing of membrane performance.
Co-Authors Apriani, Niza Yusnita Bambang Kuswandi Datin An Nisa Sukmawati Dhony Hermanto Dwi Siswanta Fahrurazi Fahrurazi Fahrurazi Fahrurazi Iman Rahayu Iman Rahayu Hidayati Soesanto Iriando, Mahadi Muhammad Gunadharma Iwan Sumarlan Juliandri Juliandri Juliandri Laili Mardiana Laili Mardiana Lely Kurniawati Mamika Ujianita Romdhini, Mamika Ujianita Mariana, Baiq Marliadi Susanto Masyhuri, Aga Adi Mudasir Mudasir Murniati . Nindi Herdiyanti Prihatini, Putri Jauhar Rasyadan Taufiq Probojati Rifia Wulandari RINA KURNIANINGSIH Rina Kurnianingsih Rochmad K Sanjaya Rochmad K. Sanjaya Rochmad Kris Sanjaya Rochmad Krissanjaya Sanjaya, Rochmad K Saprini Hamdiani Sari, Ayu Purnama savitri, Lisa Siti Raudhatul Kamali Siti Raudhatul Kamali Soraya Aulia Sri Juari Santosa Sri Juari Santosa Sudirman Sudirman Surya Hadi Surya Hadi TATI NURHAYATI Ulul Khairi Zuryati Wirahadi, Ahmad