Article Per Year (5 Year)
p-Index From 2019 - 2024
1.978
P-Index
This Author published in this journals
All Journal VALENSI Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Jurnal Periodic CHEMPUBLISH JOURNAL CHEESA: Chemical Engineering Research Articles Jurnal Inovasi Hasil Pengabdian Masyarakat (JIPEMAS) PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat Journal of The Indonesian Society of Integrated Chemistry
Restina Bemis
Departement Of Chemistry, Faculty Of Science And Technology, Universitas Jambi Jl. Jambi-Ma Bulian Km. 15, Mendalo Darat, Jambi, 36361, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Public Health Social Sciences Other

Published : 9 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 9 Documents
Search

 1 
Synthesis and Characterization of Nano-sized Carbonated Calcium Hydroxyapatite (CHAp) from Rebon shrimp (Acetes erythraeus) as a Candidate for Dental Restoring Application Ngatijo Ngatijo; Restina Bemis; Heriyanti Heriyanti; Rahmi Rahmi; Nashih Ulwan; Rahmat Basuki
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 7, No. 2, November 2021
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v7i2.21359

Abstract

Carbonated calcium hydroxyapatite (CHAp) exhibits excellent biocompatibility with bone and teeth, making it an ideal candidate for orthopedic and dental application. However, the study of CHAp synthesis from natural material is still scarce. The purpose of this research is to synthesize and characterize of CHAp, using Rebon shrimp (Acetes erythraeus) as a calcium source. The synthesis was conducted by hydrothermal method with the variation of Ca/P ratios 1.61; 1.67; 1.73. The as-prepared CHAp was characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), and scanning electron microscopy-energy dispersive X-ray (SEM-EDX). The FT-IR results show that synthesized material exhibited characteristic CHAp band of hydroxide at 3448 and 1635 cm-1, carbonate at 872 and 1427 cm-1, and phosphate at 1049; 606; and 570 cm-1. The diffractogram pattern assigned the all observed peak of CHAp are in good agreement compared to CHAp database with the nano-scale size. It also observed that the high Ca/P ratio will decrease the crystallinity of CHAp. The as-prepared CHAp micrograph is agglomerates spherical form with size between 5-20 nm which build up from 18–26 nm crystallite particles. The result of this research confirmed that Rebon shrimp is the promising materials for calcium source in CHAp production.
Nanofikasi Fraksi Tanah Gambut untuk Modifikator Nanomagnetit/AH-Kitosan sebagai Kandidat Penanggulangan Pencemaran Zat Warna Ngatijo Ngatijo; Restina Bemis; Mahya Ihsan; Nurul Gusmaini; Salim Hidayat; Rahmat Basuki
CHEMPUBLISH JOURNAL Vol. 5 No. 2 (2020): Chempublish Journal
Publisher : Universitas Jambi, Fakultas Sains dan Teknologi, Program Studi Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/chp.v5i2.11105

Abstract

The nanomagnetite/HA-Chitosan adsorbent has been successfully synthesized by the co-precipitation method. HA was synthesized from the peat soils of Geragai village, Tanjung Jabung Timur, Jambi province and chitosan isolated from marine animal shell waste around the city of Jambi. The results of FT-IR analysis showed that nanomagnetite/AH-chitosan has a spectra which was combination of the characteristic spectra of magnetite, HA and chitosan. Morphological analysis using SEM showed that nanomagnetite/AH-chitosan was in the form of fractal agglomerates. TEM image of magnetite/AH-chitosan showed that magnetite/AH-chitosan has nano scale magnetite core particles with a size between 4-22 nm. Crystallinity analysis showed that magnetite/AH-chitosan has 2θ characteristics of magnetite i.e., 30.1°, 35.4°, 43.1°, 57.0°, 62.68° and 74.5°. The magnetic saturation strength (Ms) decreased from 80.23 (magnetite) to 30.63 (magnetite/AH-chitosan) due to the coating of AH-chitosan on magnetite which was still effectively attracted by the external magnet with 96% effectiveness of adsorption of 25 mL Methylene Blue 10 mg/L.
Adsorpsi Methylene Blue pada Nanopartikel Magnetit tersalut Asam Humat: Kajian Isoterm dan Kinetika Ngatijo Ngatijo; Nurul Gusmaini; Restina Bemis; Rahmat Basuki
CHEESA: Chemical Engineering Research Articles Vol 4, No 1 (2021)
Publisher : Universitas PGRI Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/cheesa.v4i1.8433.51-64

Abstract

Nanopartikel magnetit merupakan suatu material dengan sifat magnet yang stabil dan memiliki luas permukaan tinggi. Penyalutan nanopartikel magnetit dengan asam humat (AH) dilaporkan dapat meningkatkan stabilitas, kapasitas adsorpsi, dan kemudahan pemisahan pasca adsorpsi. Penelitian ini bertujuan untuk melakukan sintesis Nanopartikel Magnetit tersalut Asam Humat (NpMAH) dengan metode ko-presipitasi dan menentukan parameter adsorpsinya sebagai adsorben Methylene Blue (MB) dengan metode batch. Keberhasilan sintesis ditunjukkan oleh karakterisasi NpMAH dengan FT-IR, XRD, SEM, dan VSM. Parameter isoterm adsorpsi mengindikasikan bahwa adsorpsi terjadi secara lapis tunggal dengan kapasitas adsorpsi sebesar 56,96 mg/g dan energi adsorpsi sebesar 26,31 kJ/mol pada pH optimum 6,0. Parameter kinetika menunjukkan bahwa adsorpsi mengikuti model kinetika Ho (pseudo orde kedua) dengan konstanta laju adsorpsi (kHo) sebesar 12688,71 g/molmenitdan perhitungan MB yang teradsorpsi pada kesetimbangan (qe) sebesar 2,96×10-5 mol/g. Perhitungan energi adsorpsi menggunakan model kinetika Santosa dan RBS berturut-turut 25,67 kJ/mol dan 41,25 kJ/mol.
Pengenalan ecoprint guna meningkatkan keterampilan siswa dalam pemanfaatan bahan alam Nindita Clourisa Amaris Susanto; Madyawati Latief; Ratih Dyah Puspitasari; Restina Bemis; Heriyanti Heriyanti
Jurnal Inovasi Hasil Pengabdian Masyarakat (JIPEMAS) Vol 4, No 1 (2021): Jurnal Inovasi Hasil Pengabdian Masyarakat (JIPEMAS)
Publisher : University of Islam Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33474/jipemas.v4i1.8974

Abstract

Ecoprint is a technique for printing colors and shapes on fabric using natural materials. Ecoprint techniques have been introduced to junior high school students because they can capture the material and teacher's instructions independently, think critically and creatively. The purpose of the ecoprint introduction activity is to provide knowledge about ecoprint and students' skills in utilizing local potential through natural materials or plants around the school. The methods used are lectures, demonstrations, practice, and evaluation. The questionnaires and direct observations on ecoprint products were used as evaluations for this activity. Students have been able to print motifs and colors from leaves and flowers on a cloth to produce ecoprint products according to their respective creativity. 
Decontamination of Mercury from Mined Soil using Magnetite Functionalized Quaternary Ammonium Silica (Fe3O4/SAK) Ngatijo Ngatijo; Defia Indah Permatasari; Faizar Farid; Restina Bemis; Heriyanti Heriyanti; Rahmat Basuki; Yudha Gusti Wibowo
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 18, No 1 (2021): March 2021
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (697.94 KB) | DOI: 10.14710/presipitasi.v18i1.88-98

Abstract

Artisanal small-scale gold mining (ASCGM) has caused mercury contamination. However, efforts to decontaminate mercury from the ex-mining soils are still rare. This study aims to synthesize quaternary ammonium silica functionalized magnetite (Fe3O4/SAK) as a low price, highly available, and quickly separated adsorbent for mercury decontamination from ex-mining soils samples. The synthesis of Fe3O4/SAK and the mercury decontamination process was carried out by the co-precipitation and batch type reactor procedure, respectively. The Fourier Transform-Infra Red (FT-IR) characterization of synthesized Fe3O4/SAK informed the appearance of siloxane, silanol, methyl, methylene, and Fe-O functional groups. Crystal analysis by X-Ray Diffraction (XRD) showed that the typical peaks of SiO2 and Fe3O4 were emerged at 2θ 22.8˚ and 35.52˚, respectively. Morphological studies and elemental analysis using Scanning Electron Microscopy-Energy Dispersive X-Ray (SEM-EDX) indicated the successful functionalization Fe3O4 by SAK in the transformation of surface morphology and composition of the main elements, namely C, O, Si, and Fe. The results of characterization using Surface Area Analyzer (SAA) showed that the surface area and pore diameters were 224.98 m2/g and 36.149-38.70 Å, respectively. The optimum results for adsorbing Hg22+ metal ions were obtained at pH 4.0, and the adsorbent mass was 0.1 g. The Fe3O4/SAK has been proven to be an easily separable adsorbent after the mercury decontamination process in ex-mining soil samples with an adsorption efficiency of 43.36% (0.722 mg/g).
Sintesis Nanopartikel Tembaga dari Larutan CuSO4.5H2O dengan Menggunakan Ekstrak Getah Merkubung ( Macarangan Gigantea) Warni Warni; Restina Bemis; Diah Riski Gusti
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 3 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/p.v11i3.120712

Abstract

The synthesis of copper nanoparticles in this study used a reducing agent from the extract of mercurd gum with a solution of CuSO4.5H20. The results of the synthesis of copper nanoparticles using the extract of mercurd gum resulted in the color of the solution becoming clear greenish. The reaction time greatly affects the formation of copper nanoparticles, it can be seen visually that after 5  minutes the reaction shows a color change from clear to clear greenish and a lot of precipitate is formed. As the reaction time increases, the solution gets darker. The color of the copper nanoparticle solution tends to be clear to clear greenish, the clear color will continue to increase with the length of reaction time. In XRD analysis of Cu which has been synthesized from 0.01 M mercury extract solution. It can be seen that Cu nanocrystals have been formed which are indicated by the appearance of peaks at 2q : 18.76˚, 22.24˚, and 23.99, The results of the Scanning Electron Microscopy  analysis, the results of the SEM analysis in the study show that the particle sizes produced are different from one another and the distribution of particles is uneven, there are many particles that accumulate into chunks larger than other particles so that the size is not uniform and to form agglomerations. This is because the particle growth is very fast and UV-vis Confirmation of the formation of nanoparticles can be known through UV-Vis spectrophotometer observations by measuring the absorbance value in time intervals.
PENGGUNAAN PjBL TERINTEGRASI STEAM DAN LIFE SKILL MAHASISWA DALAM PEMBELAJARAN KIMIA ANORGANIK Ngatijo Ngatijo; Restina Bemis; Ratih Dyah Puspitasari
Journal of The Indonesian Society of Integrated Chemistry Vol. 14 No. 1 (2022): Journal of The Indonesian Society of Integrated Chemistry
Publisher : Pendidikan Kimia FKIP Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jisic.v14i1.16615

Abstract

The Use Of PjBL Integrated STEAM and Students Life Skills in Inorganic ChemistryLearning ABSTRAK Tujuan penelitian ini untuk menerapkan model pembelajaran PjBL (Project Based Learning) yang terintegrasi STEAM (Science, Technology, Engineering, Art, Mathematics) dan hubungannya dengan life skill Mahasiswa dalam pembelajaran Kimia Anorganik.  Metode pengumpulan data dilakukan menggunakan pre-test dan post-test, project assessment pembuatan Batik serta presentasi Kelompok dari tugas Kelompok dalam LKM (Lembar Kerja Mahasiswa) pada Mata Kuliah Kimia Anorganik III. Tugas Kelompok yang berkaitan dengan Senyawa Koordinasi dan Isomer Senyawa Koordinasi yang dilustrasikan ke dalam Motif Batik Jambi. Art atau seni batik motif “Angso Duo” sebagai ilustrasi isomer levo dan dextro etilendiammintetraasetatokobaltat(III) dimana gugus etilen sebagai ilustrasi pada bagian ekor binatang Angsa. Engineering atau rekayasa dikembangkan melalui bahan pewarna Batik menggunakan bahan alami. Hasil Uji korelasi diperoleh 0,57 nilai signifikasi diperoleh F hitung sebesar 0,006 yang berarti lebih kecil dari 0,05 sebagai F teori. Uji determinasi diperoleh R2 sebesar 0,374 atau l=0,37 % yang menunjukkan bahwa kesesuaian penggunaan model pembelajaran PjBL terintegrasi STEAM dengan life skill mahasiswa pada praktikum pembuatan Batik dengan menggunakan Teori Kimia Anorganik III tergolong kuat (37.4%) dan sisanya dipengaruhi oleh variabel luar (62,6 %).  Berdasarkan dari hasil penelitian bahwa diperoleh hasil yang baik,  jika pembelajaran PjBL diintegrasikan dengan model STEAM dan dapat diketahui hubungannya dengan life skill yang dikembangkan mahasiswa. Batik dibuat dalam rangka Merdeka Belajar-Kampus Merdeka (MB-KM) untuk bahan baju dengan ukuran 90 x 200 cm sebagai produk karya mahasiswa. Kata Kunci: kimia anorganik, life skill, motif batik jambi, PjBL, STEAM, terintegrasi.
Pengaruh Variasi Konsentrasi Alumina Pada Sintesis Nanokomposit Hidroksiapatit/ Alumina dari Udang Papai Menggunakan Metode Hidrotermal Restina Bemis; Heriyanti Heriyanti; Rahmi Rahmi; Ratih Dyah Puspitasari; Datia Imawati
Journal of The Indonesian Society of Integrated Chemistry Vol. 15 No. 1 (2023): Journal of The Indonesian Society of Integrated Chemistry
Publisher : Pendidikan Kimia FKIP Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jisic.v15i1.21309

Abstract

Tujuan penelitian untuk mensintesis nanokomposit dan mengkarakterisasi hidroksiapatit dari udang papai dan dikomposit untuk meningkatkan sifat mekanik tanpa mengubah biokompatibilitasnya. Komposit hidroksiapatit menggunakan bahan lain seperti alumina disintesis menggunakan metode hidrotermal dengan variasi konsentrasi 0,025; 0,05 dan 0,075 juta. Komposit HA/Al2O3 dikarakterisasi dengan FTIR, SEM, dan XRD. Hasil FTIR menunjukkan bilangan gelombang. HA/Al2O3 yang disintesis menunjukkan pita O-H yang khas pada kisaran bilangan gelombang 2361-3460cm-1. CO32- pada rentang bilangan gelombang 1380-1500 cm-1. Al-O pada rentang bilangan gelombang 901cm-1 menunjukkan bahwa HA telah didoping dengan Al2O3. PO43- pada bilangan gelombang 605;873 dan 1041 cm-1. Pola difraktogram menentukan bahwa semua puncak HA/Al2O3 yang diamati berada pada daerah 2theta 10-70° menurut database referensi dan derajat kristalinitas meningkat dengan konsentrasi tinggi alumina yang digunakan. Morfologi doping HA/Al2O3 berupa aglomerasi karena pada proses sintesis menggunakan metode hidrotermal tidak ada pengadukan sehingga bahan kurang homogen, analisis SEM menggunakan software origin dan image j menunjukkan presentase porositas lebih kecil sehingga memenuhi persyaratan untuk digunakan sebagai implan dan memberikan nilai ukuran semakin kecil dalam skala nano, yakni pada rentang 5-14,5 nm.
Pengembangan Ekonomi Kreatif Masyarakat melalui Pengolahan Limbah Kulit Kopi Liberika di Desa Jatimulyo: The Development of Economy Creative through Liberica Coffee Waste Processing in Jatimulyo Village Madyawati Latief; Heriyanti Heriyanti; Indra Lasmana Tarigan; Restina Bemis; Ratih Dyah Puspitasari
PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat Vol. 9 No. 3 (2024): PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat
Publisher : Institute for Research and Community Services Universitas Muhammadiyah Palangkaraya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33084/pengabdianmu.v9i3.5562

Abstract

Coffee pulp is a by-product of coffee cherry processing. It has the potential to be used as a source of antioxidant activity. The dried coffee pulp is commonly referred to as cascara tea, which can be used as a functional drink. The coffee pulp contains caffeine, phenols, and chlorogenic acid that has antioxidant activity. Cascara tea can be fermented into kombucha as a functional drink that contains probiotics. In Jatimulyo Village, coffee cultivation and processing have been developed, but coffee skin waste is not used. Seeing the potential for processing coffee pulp waste into cascara and kombucha cascara tea products can provide added value (value added) to coffee pulp waste. The existence of added value to a product can increase the selling price in the market. The processing of coffee pulp waste into a product that is useful and has a sale value can be used as an effort to develop a creative economy. The results achieved from this activity are increasing the knowledge and skills of Jati Mulyo Village residents in utilizing coffee pulp waste into food products that are useful and have economic selling value.
Co-Authors Datia Imawati Defia Indah Permatasari Diah Riski Gusti Faizar Farid Heriyanti Heriyanti Indra Lasmana Tarigan Madyawati Latief Mahya Ihsan Nashih Ulwan Ngatijo Ngatijo Nindita Clourisa Amaris Susanto Nurul Gusmaini Rahmat Basuki Rahmat Basuki Rahmi Rahmi Rahmi Rahmi Ratih Dyah Puspitasari Salim Hidayat Warni Warni Wibowo, Yudha Gusti