Article Per Year (5 Year)
p-Index From 2019 - 2024
1.756
P-Index
This Author published in this journals
All Journal Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Indonesian Journal of Pharmaceutical Science and Technology Jurnal Kelautan Tropis Journal Of Chemical Process Engineering (JCPE) Indonesian Journal of Pure and Applied Chemistry Journal Of Chemical Process Engineering
Thamrin Usman
Jurusan Kimia Fakultas Matematika Dan Ilmu Pengetahuan Alam Universitas Tanjungpura
Aerospace Engineering Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Earth & Planetary Sciences Energy Engineering Medicine & Pharmacology

Published : 11 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 11 Documents
Search

 1   2 
Acute Oral Toxicity of Cincalok Oil in Wistar Rats Siti Nani Nurbaeti; Inarah Fajriaty; Fajar Nugraha; Hadi Kurniawan; Winda Rahmalia; Thamrin Usman; Dwi I. Prayitno
Indonesian Journal of Pharmaceutical Science and Technology Vol 8, No 2 (2021)
Publisher : Indonesian Journal of Pharmaceutical Science and Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/ijpst.v8i2.26343

Abstract

Cincalok is a West Kalimantan traditional fermented food that has an opportunity to be developed into supplement products as a source of omega 3 and astaxanthin. This study was designed to observe the acute toxicity of Cincalok oil in female rats for its safety profile using AOT 425 program. Cincalok oil for the acute (2000 and 5000 mg/kg) toxicity studies was administered orally according to the OECD guidelines 425. The rat’s body and organs weight were observed then signs of toxicity were assessed. LD50 was being determined at the end of the study. The result showed that a single dose of Cincalok oil at 2000 or 5000 mg/kg had no lethal effect, behavioral change, a significant change in rat’s bodyweights, or any lesion on the rat’s organs. The LD50 of Cincalok oil for oral administration was higher than 5000 mg/kg and categorized as practically non-toxic.Keywords: Acute Toxicity, Cincalok Oil, LD50.
Ekstraksi, Karakterisasi dan Uji Aktivitas Antioksidan Astaxanthin dari Produk Fermentasi Udang (Cincalok) Mauludia Mauludia; Thamrin Usman; Winda Rahmalia; Dwi Imam Prayitno; Siti Nani Nurbaeti
Jurnal Kelautan Tropis Vol 24, No 3 (2021): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v24i3.10497

Abstract

Shrimp is one of the aquatic organisms that contain several active compounds, including astaxanthin. Cincalok is one of the fermented shrimp products containing astaxanthin. This study aims to determine the characteristics of astaxanthin extract from cincalok and its antioxidant activity. Extraction of astaxanthin from cincalok was carried out using the reflux method with acetone : cyclohexane (20:80 v/v) as a solvent. The identification and characterization of astaxanthin was carried out using thin-layer chromatography (TLC), UV-Vis spectrophotometry, and High-Pressure Liquid Chromatography (HPLC). Meanwhile, the antioxidant activity test was carried out using the 1,1-diphenyl-2-picrylhydrazyl (DPPH) method in one serial concentration (5; 15; 25 ppm). The results of TLC analysis showed that astaxanthin in cincalok extract has Rf value (0.32). The analysis using a UV-Vis spectrophotometer produced a spectrum with a maximum wavelength of 477 nm, which corresponds to the maximum wavelength of standard astaxanthin. The yield of astaxanthin extract from cincalok in this study was 1.47 mg/100 g wet weight. The chromatogram from the results of UHPLC analysis showed that the retention time of cincalok astaxanthin extract was 6.27 minutes with a purity of 18.03%. The antioxidant activity of cincalok astaxanthin extract was 568.32 ppm. Udang merupakan salah satu organisme air yang mengandung banyak senyawa aktif, termasuk astaxanthin. Cincalok merupakan salah satu produk hasil fermentasi udang yang mengandung astaxanthin. Penelitian ini bertujuan untuk mengetahui karakteristik ekstrak astaxanthin dari cincalok dan aktivitas antioksidannya. Ekstraksi astaxanthin dari cincalok menggunakan metode refluks dengan pelarut aseton:sikloheksan (20:80 v/v). Identifikasi dan karakterisasi astaxanthin dilakukan dengan menggunakan kromatografi lapis tipis (KLT), spektrofotometri UV-Vis, dan High Pressure Liquid Chromatography (HPLC). Sedangkan uji aktivitas antioksidan dilakukan menggunakan metode 1,1-difenil-2-pikrilhidrazil (DPPH) dengan memvariasikan konsentrasi larutan uji, yaitu 5; 15; 25 ppm. Hasil dari penelitian ini melaporkan astaxanthin pada ekstrak cincalok menunjukkan nilai Rf 0,32 pada kromatografi lapis tipis (KLT). Hasil analisis menggunakan spektrofotometer UV-Vis menghasilkan spektra dengan panjang gelombang maksimum 477 nm, yang sesuai dengan panjang gelombang maksimum astaxanthin standar. Randemen ekstrak astaxanthin dari cincalok pada penelitian ini adalah 1,47 mg/100 g berat basah. Kromatogram dari hasil analisis UHPLC menunjukkan waktu retensi ekstrak astaxanthin cincalok yaitu selama 6,27 menit dengan kemurnian sebesar 18,03%. Aktivitas antioksidan dari ekstrak astaxanthin cincalok diperoleh sebesar 568,32 ppm.  
Selektivitas Adsorpsi Asam Lemak Bebas (ALB) dan Beta Karoten Minyak Sawit Mentah Menggunakan Metakaolin Teraktivasi Kalium Karbonat (K2CO3) Hamdil Mukhlishin; Winda Rahmalia; Thamrin Usman
Journal of Chemical Process Engineering Vol 5, No 1 (2020)
Publisher : Universitas Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1495.016 KB) | DOI: 10.33536/jcpe.v5i1.431

Abstract

Indonesia merupakan salah satu negara penghasil minyak kelapa sawit mentah (Crude Palm Oil, CPO) terbesar di dunia. Kadar asam lemak bebas dan beta karoten menjadi 2 parameter kualitas yang menentukan mutu minyak kelapa sawit mentah. Proses pemurnian CPO untuk menurunkan kadar asam lemak bebas dan beta karoten biasanya menggunakan adsorbent dari jenis bleaching earth. Tujuan dari penelitian ini adalah membuat adsorbent yang berasal dari kaolin Capkala Kalimantan Barat yang digunakan untuk menurunkan kadar asam lemak bebas dan beta karoten pada CPO. Pemilihan kaolin sebagai bahan pembuatan adsorben didasarkan pada karakteristik kaolin dan kelimpahannya yang banyak di daerah Kalimantan Barat sehingga berpotensi digunakan sebagai adsorbent yang efektif dan ekonomis. Pembuatan adsorbent dilakukan dengan mengkalsinasi kaolin pada suhu 600 °C sehingga membentuk metakaolin kemudian diaktivasi dengan senyawa K2CO3 dengan konsentrasi 0.5, 1, dan 2 M. Metakaolin yang sudah diaktivasi kemudian dikeringkan dan diaplikasikan untuk menurunkan kadar asam lemak bebas dan beta karoten pada CPO. Kadar asam lemak bebas dan beta karoten pada CPO yang diadsorpsi oleh adsorbent dihitung, kemudian ditentukan selektivitas adsorpsi, kinetika adsorpsi, dan pola adsorpsi isothermalnya. Hasil penelitian menunjukkan bahwa karakteristik adsorben dari metakaolin teraktivasi K2CO3 yaitu memiliki struktur sillimanite dan kynite yang menyerupai zeolit, dengan komposisi Si/Al = 1, dengan tipe isoterm adsorpsi gas nitrogen H4 histerisis, distribusi pori heterogen yang didominasi pada 13-15 nm (mesopori), dan memiliki luas permukaan sebesar 28,74 m2g-1, serta volume pori sebesar 8,018 x 10-2cm3g-1. Jenis adsorben metakaolin teraktivasi K2CO3 1 M terbukti paling baik untuk mengadsorpsi asam lemak bebas sebesar 2,49 % dan beta karoten sebesar 26,15 % pada CPO dengan kondisi waktu kontak dan massa adsorben optimum adsorpsi yang sama yaitu 60 menit dan massa adsorben 0,4 gram/10 mL CPO. Selektivitas adsorpsi adsorben lebih banyak menyerap kadar beta karoten dibandingkan kadar asam lemak jenuh pada CPO. Rasio adsorpsi asam lemak bebas dan beta karoten paling baik terdapat pada jenis adsorben metakaolin teraktivasi K2CO3 1 M dengan nilai 2:13 dalam mol/mol. Isoterm adsorpsi asam lemak bebas dan beta karoten memiliki tipe yang sama yaitu isoterm Freundlich. Kinetika adsorpsi asam lemak bebas dan beta karoten memiliki model yang sama yaitu Pseudo orde 2 untuk setiap jenis adsorben.
Studi Komparasi Penggunaan TiO2 Anatase dan P25 sebagai Anoda pada Sel Surya Tersensitasi Bixin Septiani Septiani; Uray Amira Naselia; Imelda H Silalahi; Thamrin Usman; Winda Rahmalia
Journal of Chemical Process Engineering Vol 6, No 1 (2021)
Publisher : Universitas Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (443.375 KB) | DOI: 10.33536/jcpe.v6i1.593

Abstract

Penelitian ini dilakukan untuk melihat kinerja sel surya yang menggunakan TiO2-anatase TiO2-P25 sebagai anoda. Bixin digunakan sebagai sensitizer. Bixin diekstraksi dan diisolasi dari biji kesumba. Bixin dianalisis menggunakan spektrofotometer UV-Vis dan FTIR. Hasil analisis menggunakan spektrofotometer UV-Vis menunjukkan adanya 3 puncak karakteristik bixin pada 488, 459, 430 nm. Spektra FTIR  bixin ditandai dengan adanya serapan pada bilangan gelombang 3183 cm­-1 mengindikasikan vibrasi renggang –OH yang berasal dari gugus karboksilat, pada 2955 cm-1; 2924 cm-1; dan 2852 cm-1 vibrasi renggang H-C-H, pada 1716 cm-1 vibrasi renggang C=O, pada 1608 cm-1 vibrasi tekuk O-H, pada 1563 cm-1 dan 1518 cm-1 vibrasi renggang C=C (alkena), pada 1379 cm‑1 vibrasi tekuk C-H, pada 1255 cm-1 vibrasi renggang C-O, pada 1161 cm-1 vibrasi simetri dan asimetri C-O-C (kelompok ester), pada 1012 cm-1 vibrasi renggang C-H. Kinerja sel surya TiO2-antase/Bx/KI-I2+GKS/C menunjukkan efisiensi konversi energi maksimum yang lebih tinggi jika dibandingkan dengan TiO2-P25/Bx/KI-I2+GKS/C masing-masing sebesar (0,027±0,012)% dan (0,006±0,001)% di bawah intensitas cahaya 100 W/m2.
Sintesis Komposit Berbasis TiO2-kitosan Menggunakan Metode Hidrotemal Utin Widiatannur; Thamrin Usman; Winda Rahmalia
Journal of Chemical Process Engineering Vol 5, No 2 (2020)
Publisher : Universitas Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (935.174 KB) | DOI: 10.33536/jcpe.v5i2.555

Abstract

Dalam penelitian ini telah dilakukan sintesis komposit TiO2-kitosan yang bertujuan untuk mengetahui bagaimana karakteristik komposit TiO2-kitosan dibandingkan dengan TiO2 murni. Sintesis komposit TiO2-kitosan dilakukan menggunakan metode hidrotermal dilanjutkan dengan kalsinasi pada suhu 300oC. Kitosan yang didopingkan pada TiO2 divariasi konsentrasinya dari 1,0; 1,5; dan 2,0% b/v. Hasil analisis dengan menggunakan FTIR menunjukkan adanya gugus fungsi Ti-O, Ti-N, -O-Ti-OH/NH2, OH, N-H, C-H, C=O yang mengindikasikan bahwa komposit TiO2-kitosan telah terbentuk. Hasil karakterisasi XRD memperlihatkan bahwa fase kristalin didominasi oleh fase TiO2 anatase. Hasil karakterisasi menggunakan DR-UV menunjukkan nilai energi celah pita komposit TiO2-kitosan dengan konsentrasi kitosan yang ditambahkan 1,0; 1,5; dan 2,0 %b/v berturut-turut adalah sebesar 2,92; 2,49; 2,45 eV, lebih rendah dibandingkan dengan energi celah pita TiO2 murni (3,13 eV). Berdasarkan hasil penelitian ini dapat disimpulkam bahwa sintesis TiO2-kitosan telah berhasil dilakukan dan dapat menurunkan energi celah pita dari TiO2.
BIOADSORPSI Fe(II) OLEH KULIT BUAH JERUK Citrus nobilis Lour. var microcarpa TERMODIFIKASI Ca(OH)2 Norvi Fatmawati; Thamrin Usman; Titin Anita Zahara
Indonesian Journal of Pure and Applied Chemistry Vol 1, No 3 (2018)
Publisher : Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (725.029 KB) | DOI: 10.26418/indonesian.v1i3.34205

Abstract

Pontianak peel fruit waste contains pectin, cellulose, and hemicellulose which can be used as heavy metal adsorbents by modifying using Ca(OH)2. The purpose of this study was to determine the physicochemical characteristics of calcium-modified Pontianak Citrus adsorbents (JeP-Oca), determine the maximum capacity of Fe(II) adsorption by JeP-OCa, and JeP-OCa adsorption kinetics. The characteristics of the adsorbent were analyzed using the Fourier Transformation Infra Red (FTIR) showing the functional groups of –OH and -COOH, Electron Scanning (SEM) Microscopy showing the surface structure of the canal and many irregular niches. The adsorption isotherm method with the BET model showed a large difference in porous surface area, namely 104.872 m2/g for JeP, 242.649 m2/g for JeP-ONa and 3759.745 m2/g for JeP-OCa. Optimization of the influence of pH, adsorbent mass, adsorbate concentration, and time using the column method. Adsorption isotherm followed the Freundlich isotherm model with maximum adsorption capacity value of 22.7272 mg/g. Fulfill the pseudo-order 2 reaction kinetics with a rate constant value of 4.097 L/mg. Min. The adsorption application using groundwater resulted in absorption efficiency of 82.99%.
ADSORPSI ASAM LEMAK BEBAS PADA CRUDE PALM OIL MENGGUNAKAN ZEOLIT TERAKTIVASI K2CO3 Nia Dahlia; Winda Rahmalia; Thamrin Usman
Indonesian Journal of Pure and Applied Chemistry Vol 2, No 3 (2019)
Publisher : Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (813.747 KB) | DOI: 10.26418/indonesian.v2i3.36892

Abstract

Research on the use of K2CO3-activated zeolite as an adsorbent for free fatty acid (FFA) adsorption on crude palm oil (CPO) has been done. CPO is one of the mainstay products of Indonesian plantations which are used as raw material for cooking oil. The aim of this study to determine the adsorption capacity of activated zeolites against free fatty acid of CPO. The results showed that the iodium uptake capacity of zeolites before activation was 495.6%, activated zeolites were 527.1% and impregnated zeolites were 642.6%. The number of zeolites with the best absorption was 2 grams and ALB was absorbed 4.079% for activated zeolites (ZAA), 4.98% for impregnated zeolites (ZAI), and the water content and impurities were still below SNI standards. The CPO adsorption process with zeolites shows the Langmuir model with a correlation value (R2) of 0.9999 for ZAA and (R2) of 0.9976 for ZAI. The results showed that activated zeolites had lower absorption than impregnated zeolites.
UJI KELARUTAN LOGAM DARI TAILING TIMAH MENGGUNAKAN PELARUT EUTEKTIK BERBASIS KOLIN KLORIDA DAN ASAM p-TOLUENASULFONAT Nimas Ade Kusdayanti; Winda Rahmalia; Thamrin Usman
Indonesian Journal of Pure and Applied Chemistry Vol 2, No 2 (2019)
Publisher : Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2571.673 KB) | DOI: 10.26418/indonesian.v2i2.36906

Abstract

Deep eutectic solvents (DES) are defined as combinations of two or three components which are able to establish hydrogen bond interactions with each other to form an eutectic mixture, that have a melting point lower than that of the each individual component. This study aims to determine the characteristics of DES based on choline chloride (ChCl) as quaternary ammonium salts and p-toluenasulfonic acid (PTSA) as hydrogen bond donors and to investigate their selectivity for dissolving metals in tin tailings. Synthesis of DES was carried out by mixing ChCl and PTSA with variations of the mole fraction, then stirring at 80 oC for 15 minutes. Resulted products were characterized their freezing point, density, viscosity, conductivity and functional groups. Mixture with a mole fraction of ChCl 0.6 formed homogeny clear liquid. It has a freezing point of 8 oC, density of 1.207 g/mL, viscosity of 4.663 cP, and conductivity of 182.4 mS/cm. Based on fourier transform infrared (FTIR) analysis, the interaction between ChCl and PTSA was due to the formation of hydrogen bonds between the O atoms of PTSA and the H atoms of ChCl. Inductively coupled plasma atomic emission spectroscopy (ICP-AES) analysis showed the presence of 1962 ppm of Fe metal dissolved in DES. This value was significant greater than the presence of other metals in the DES.
ADSORPSI ASAM LEMAK BEBAS DALAM MINYAK SAWIT MENTAH MENGGUNAKAN ADSORBEN ABU TANDAN KOSONG SAWIT M Syahwandi; Winda Rahmalia; Titin Anita Zahara; Thamrin Usman
Indonesian Journal of Pure and Applied Chemistry Vol 2, No 3 (2019)
Publisher : Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (697.167 KB) | DOI: 10.26418/indonesian.v2i3.36894

Abstract

Research on the use of the oil palm empty fruit bunch (OPEFB) as an adsorbent for free fatty acid (FFA) adsorption on Crude Palm Oil (CPO) has been done. CPO is the main raw material in the manufacture of food products. The results of OPEFB adsorbent characteristics showed the amount of water content and ash content of 0,067% and 0,175%, XRF analysis obtained the greatest content of OPEFB in the form potassium metal as much as 44,24%, FTIR analysis identified that there were CO3 compounds in wave number 1648 cm-1 and SEM analysis indicates there are no pores in OPEFB. The result showed that the number of OPEFB with the best adsorption was 0,1 gram with 60 minute optimum contact time. The CPO adsorption process with OPEFB shows the Langmuir model with a correlation value (R2) of 0,8845 and the adsorptions kinetics follows the pseudo order 2 adsorption kinetics model with a correlation value (R2) of 0,9857. The results of this study showed the characteristics of CPO before and after adsorbed using 0,1 g of adsorbent OPEFB showed the amount of FFA level of 7,321% to 6,297%, water content of 0,0025% to 0,00119% and impurities content of 0,8847% to 0,8408%.
Determination of Optimum Conditions for Synthesis of Methyl Ester from Bleached Crude Palm Oil Using Sn-Zeolite and Red Mud Catalysts Esi Amelyanti; Thamrin Usman; Winda Rahmalia
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 20, No 2 (2023): July 2023
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v20i2.267-279

Abstract

Methyl esters synthesis from bleached crude palm oil (BCPO) containing 0.36 and 20.86% of free fatty acids using Sn-zeolite and red mud has been done. This study aims to determine the esterification, transesterification, and transesterification-esterification simultaneous reactions optimum conditions when using Sn-zeolite, red mud, and Sn-zeolite-red mud mixture catalysts. The X-ray diffraction and Fourier transform infrared analysis results show that Sn has been impregnated on zeolite, indicated by cassiterite and Sn-O-Sn vibrational peaks in Sn-zeolite. The main component of red mud is NaCO3, indicated by analcite and carbonate peaks. Thin-layer chromatography results in the transesterification showed that red mud catalyst could totally convert triglycerides from BCPO to methyl ester when 5% catalyst, 3 hours, and CPO:methanol mole ratio 1:20 were used. In esterification, Sn-zeolite can synthesize methyl ester from low-quality CPO when using CPO:methanol mole ratio 1:20 for 3 hours, however, the conversion was not total. In the transesterification-esterification simultaneous, the conversion was also not total which the best reaction conditions at mixing Sn-zeolite:red mud 1.5:1 (w/w), 7% catalyst, and CPO:methanol mole ratio 1:20 for 3 hours. This study shows that esterification and transesterification processes can be carried out simultaneously at a particular mass ratio of Sn-zeolite and red mud.
Co-Authors Dwi I. Prayitno Dwi Imam Prayitno Esi Amelyanti Fajar Nugraha Fajriaty, Inarah Hadi Kurniawan Hamdil Mukhlishin Imelda H. Silalahi Imelda Hotmarisi Silalahi M Syahwandi Mauludia Mauludia Nia Dahlia Nimas Ade Kusdayanti Norvi Fatmawati Septiani Septiani Septiani Septiani Siti Nani Nurbaeti Titin Anita Zahara Titin Anita Zahara Uray Amira Naselia Uray Amira Naselia Utin Widiatannur Winda Rahmalia