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All Journal JURNAL KIMIA SAINS DAN APLIKASI KOVALEN: Jurnal Riset Kimia Jurnal Sains dan Teknologi Pangan Jurnal Progres Kimia Sains Chemistry Indonesian Journal of Chemical Research JURNAL ILMU KEFARMASIAN INDONESIA Sarwahita : Jurnal Pengabdian Kepada Masyarakat Cokroaminoto Journal of Chemical Science Jurnal Mandala Pengabdian Masyarakat Jurnal Akademika Kimia Amal Ilmiah: Jurnal Pengabdian Kepada Masyarakat
THAMRIN AZIS
UNIVERSITAS HALU OLEO
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Education Energy Engineering Environmental Science Materials Science & Nanotechnology Medicine & Pharmacology Public Health Social Sciences Other

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Analisis Residu Pestisida Diazinon Dalam Tanaman Kubis (Brassica Olarecea) Menggunakan Biosensor Elektrokimia Secara Voltametri Siklik Azis, Thamrin
Jurnal Progres Kimia Sains Vol 1, No 1 (2011): JPKS Open Acces
Publisher : Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (145.355 KB)

Abstract

Biosensor voltametri siklik merupakan suatu sistem yang terdiri atas biotranduser, sistem engolah sinyal elektronik dan sistem keluaran informasi. Sistem tersebut memungkinkan pengukuran dan pengamatan analit yang spesifik terhadap jenis biotranduser yang digunakan. Penelitian dilakukan untuk membuat suatu biotranduser enzim voltametri siklik dan mengkarakterisasi sensitifitas, selektifitas dan karakteristik respon dari biotranducer tersebut. Biosensor yang telah didesain dikaraterisasi meliputi faktor Nernst, limit deteksi, waktu respon, dan selektivitas. Hasil penelitian untuk uji kinerja Harga faktor Nernst diperoleh 28,1 mV/dekade dengan kisaran pengukuran 10-9 – 10-6 M pada kompoisisi membran SA 10 % GA 20 %. Nilai limit deteksi adalah 1,29 x 10-4 M dengan kisaran pengukuran 10-6-10-3 M pada komposisi membran SA 10 % GA 20 %. Batas waktu respon rata-rata pengukuran 15-280 detik.
RESIDU PESTISIDA DIAZINON DALAM SAYURAN KUBIS (Brassica olarecea) Azis, Thamrin; Wahyuni, Sri; Muzakkar, Muhammad Zakir
Jurnal Sains dan Teknologi Pangan Vol 5, No 3 (2020): Jurnal Sains dan Teknologi Pangan
Publisher : JURUSAN ILMU DAN TEKNOLOGI PANGAN, UNIVERSITAS HALU OLEO

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (711.83 KB) | DOI: 10.33772/jstp.v5i3.13113

Abstract

ABSTRACTThe presence of pesticide residues in vegetables is a food safety problem. This research aimed to analyze the performance of biosensor made of platinum (Pt) coated with active ingredient butyrylcholinesterase enzymes in detecting diazinon residues in cabbages. This research used supporting materials of cellulose acetate (SA) and glutaraldehyde (GA) in various compositions. This study evaluated the absorption (potential) of each electrode composition to the time of the last spraying of the diazinon residue in cabbages. Diazinon residual levels were measured in cabbages at the last spraying time interval (0 days, 5 days, 10 days, 15 days) of each electrode composition.The results of absorption measurements (potential) of each electrode against time intervals (0 days, 5 days, 10 days, 15 days) show that the lowest levels of diazinon residue were found in samples on electrodes SA 5.0% GA (10%, 15%, and 20% ) with the last spraying interval of 0 days before harvest of 0.390 ppm, 1,620 ppm, and 0.026 ppm, respectively. Meanwhile, the highest residue was found in cabbage samples with the last spraying interval of 5 days before harvest, which were 28.80 ppm, 27.0 ppm, and 17.0 ppm. The results show that the designed biosensors can detect diazinon residues in cabbages.Keywords: Pesticide, Biosensor, potentiometric, enzyme buirilcholinesteraseABSTRAKKeberadaan residu pestisida dalam sayuran merupakan masalah keamanan pangan. Penelitian ini bertujuan menganalisis hasil aplikasi desain biosensor terbuat dari kawat platina (Pt) terlapis bahan aktif enzim butirilkolinesterase dalam mendeteksi residu diazinon pada sayuran kubis. Penelitian ini menggunakan bahan pendukung membran selulosa asetat (SA) dan glutaldehid (GA) berbagai komposisi. Penelitian ini mengevaluasi serapan (potensial) dari masing-masing komposisi elektroda biosensor terhadap waktu penyeprotan terakhir residu diazinon pada sayuran kubis. Kadar residu diazinon diukur dalam sayuran kubis dengan interval waktu penyemprotan terakhir (0 hari, 5 hari,10 hari, 15 hari) dari masing-masing komposisi elektroda.Hasil pengukuran serapan (potensial) setiap elektroda biosensor terhadap interval waktu (0 hari, 5 hari, 10 hari, 15 hari) adalah kadar residu diazinon terendah terdapat sampel sayuran kubis pada elektroda SA 5,0 % GA (10 % , 15 % dan 20 %) dengan interval waktu penyemprotan terakhir 0 hari sebelum panen sebesar 0,390 ppm, 1,620 ppm, dan 0,026 ppm. Sementara nilai kadar residu tertinggi terdapat pada sampel kubis dengan interval waktu penyemprotan terakhir 5 hari sebelum panen yaitu sebesar 28,80 ppm, 27,0 ppm dan 17,0 ppm. Hasil penelitian membuktikan biosensor yang didesain mampu mendeteksi residu diazinon pada sayuran kubis.Kata Kunci: Pestisida, Biosensor, Potensiometri, enzim Butirilklonesterase.
PREDIKSI UMUR SIMPAN TEPUNG WIKAU MAOMBO MENGGUNAKAN PENDEKATAN KADAR AIR KRITIS Wahyuni, Sri; Azis, Thamrin; Dewi, Dian Puspita; Juwita, Citra; holilah, holilah
Jurnal Sains dan Teknologi Pangan Vol 5, No 3 (2020): Jurnal Sains dan Teknologi Pangan
Publisher : JURUSAN ILMU DAN TEKNOLOGI PANGAN, UNIVERSITAS HALU OLEO

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (914.629 KB) | DOI: 10.33772/jstp.v5i3.13112

Abstract

ABSTRACTWikau maombo, traditional food in Buton, Southeast Sulawesi, is a cassava product processed by seawater immersion and fermentation. The shelf life of Wikau maombo flour as dry food products was predicted using ASLT (accelerated shelf-life testing) method through the critical moisture content approach based on the sorption isotherm curve of the equilibrium moisture value at each RH of saturated solution/salt. This study aimed to predict the shelf life of Wikau maombo flour packaged using polypropylene plastic with different thickness, ie. 0.06 mm (WM1) and 0.08 mm (WM2). The results show that the initial moisture content of Wikau maombo flour was 10.27%. Critical moisture contents of WM1 and WM2 samples at Relative Humidity (RH) of 75% were 11.11% and 11.28%, respectively. Isotherm sorption curve of WM1 and WM2 sample were Sigmoid (S) which selected sorption isotherm curve (Caurie model) as the appropriate sorption isotherms equation. The smallest value of mean relative deviation (MRD) in WM1 and WM2 samples were 1.49 and 2.48, respectively. The respective shelf life of WM1 and WM2 products were 318.43 days (10 months 18 days) and 434.22 days (1 year 2 months).Keywords: critical moisture content; shelf life; wikau maombo.ABSTRAKWikau maombo merupakan makanan tradisional di Buton, Sulawesi Tenggara. Wikau maombo merupakan produk olahan ubi kayu melalui proses perendaman dalam air laut dan fermentasi. Umur simpan tepung Wikau mambo sebagai produk pangan kering diprediksi dengan metode ASLT (Accelerated Shelf-Life Testing) melalui pendekatan kadar air kritis berdasarkan kurva isotherm sorpsi dari nilai kadar air kesetimbangan pada masing-masing RH penyimpanan larutan/garam jenuh. Untuk medapatkan kemulusan kurva yang tinggi, dibuat model-model persamaan sorpsi isotermis yang mana dipilih lima model persamaan matematis yaitu model Hasley, Chen-Clayton, Henderson, Caurie, dan Oswin. Persamaan tersebut dapat menjelaskan fenomena sorpsi isotermis secara teoritis pada jangkauan nilai aktivitas air (aw) yang luas. Tujuan penelitian ini untuk memprediksi umur simpan produk tepung Wikau maombo yang dikemas menggunakan plastik polipropilena dengan ketebalan yang berbeda, yaitu 0.06 mm (WM1) dan 0.08 mm (WM2). Hasil penelitian menunjukkan bahwa kadar air awal tepung wikau maombo sebesar 10.27%. kadar air kritis sampel WM1 dan WM2 pada RH 75% berturut-turut yaitu 11.11% dan 11.28%. Kurva isotherm sorpsi sampel WM1 dan WM2 berbentuk Sigmoid (S) dengan persamaan terpilih model Caurie sebagai persamaan isotherm sorpsi yang tepat dengan nilai Mean Relative Deviation (MRD) terkecil pada sampel WM1 dan WM2 berturut-turut yaitu 1.49 dan 2.48. Umur simpan produk WM1 dan WM2 berturut-turut sebesar 318,43 hari (10 bulan 18 hari) dan 434,22 hari (1 tahun 2 bulan).
Technology Guidance for Making Vitamin-C Juice Extract as an Alternative to Problems Over Production of Citrus Fruits for Konda Farmers Maulidiyah Maulidiyah; Nur Illyyin Akib; Muhammad Zakir Muzakkar; Thamrin Azis; Muhammad Nurdin; Zul Arham; Irwan Irwan
Jurnal Mandala Pengabdian Masyarakat Vol. 2 No. 2 (2021): Jurnal Mandala Pengabdian Masyarakat
Publisher : Progran Studi Farmasi STIKES Mandala Waluya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (882.39 KB) | DOI: 10.35311/jmpm.v2i2.37

Abstract

Bimbingan teknologi (BIMTEK) pembuatan ekstrak jus Vitamin-C konsentrasi tinggi telah dilakukan kepada masyarakat petani jeruk Konda. Kegiatan BIMTEK diharapkan memberi solusi alternatif terhadap permasalahan over production buah jeruk. Dimana, permasalahan over production buah jeruk tidak hanya mendatangkan keuntungan bagi petani, namun kondisi ini dapat menyebabkan keuntungan petani menjadi tidak optimal bahkan petani dapat mengalami kerugian. Tahapan metode yang dilakukan pada kegiatan BIMTEK meliputi sosialisasi kegiatan, pengenalan teknik dan peralatan sederhana, pembinaan produksi ekstrak jus Vitamin-C berbasis teknologi low pressure, dan focus group discussion (FGD). Luaran yang dihasilkan dari kegiatan BIMTEK yaitu Modul panduan pembuatan dan produk ekstrak jus Vitamin-C. Luaran ini diharapkan dapat dimanfaatkan oleh masyarakat petani jeruk konda untuk mengatasi permasalahan over production buah jeruk. Sehingga masyarakat petani dalam meningkatkan pendapatan ekonomi dimasa panen buah jeruk.
Kinerja Elektroda Platina Terlapis Enzim Butirilkholinesterase-Selulosa Asetat-Glutaraldehida untuk Deteksi Diazinon: Performance of Platina Electrode Coated by Butyrylcholinesterase-Cellulose Acetate-Glutaraldehyde for Diazinon Detection Thamrin Azis; Nurhaeni; Caterina Bijang; A. Nurwahida
KOVALEN: Jurnal Riset Kimia Vol. 6 No. 2 (2020): Edisi Agustus
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/kovalen.2020.v6.i2.15237

Abstract

Diazinon (o, o-diethyl-o [2-isopropyl-6-methyl pyrimidynyl] phosphorotioate) is one of the organophosphate group pesticides widely used to protect cabbage plants (Brassica olarecea). Pesticide residues left in plants can bind to the cholinesterase enzyme and cause system disruption nerve. Analysis of diazinon residues in cabbage plants needs to be done to determine the level of toxicity caused. The electrochemical biosensor method as an electrochemical sensor uses a working electrode of platinum wire coated with the enzyme butybholchesteresterase (BChE) and cellulose acetate (SA) membrane and glutaraldehyde (GA) can be used for the analysis of pesticide residues. The test results of the SA electrode composition of the 10% GA 20% membrane obtained Nernst factor prices 28.1 µV / decade with a measurement range of 10-9 - 10-6 M, detection limit value of 1.29 x 10-7 M response time of 30 - 300 seconds. Keywords: biosensor, butylochholesterase, membrane, electrochemistry
Studi dan Aplikasi Elektroda FeTiO3-TiO2/Ti untuk Degradasi Reactive Blue 160 dengan Metode Fotoelektrokatalisis: Study and Application of Photoelectrocatalytic FeTiO3-TiO2/ Ti Electrode to High-Degradation of Reactive Blue 160 Thamrin Azis; Maulidiyah Maulidiyah; Muhammad Nurdin; Muh. Zakir Muzakkar; Ratna; La Ode Abd Kadir; Viesta Valentin Octavian; T Nurwahida; C Bijang; Haris W
KOVALEN: Jurnal Riset Kimia Vol. 7 No. 2 (2021): Edisi Agustus
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/kovalen.2021.v7.i2.15561

Abstract

The manufacture of titanium dioxide (TiO2) electrodes is made by anodizing method and coated with ilmenite (FeTiO3) through a dip-coating technique. The ilmenite (FeTiO3) coated TiO2/Ti plate electrode was developed for the degradation of the reactive blue 160 dye under photoelectrocatalytic UV and Visible light irradiation. The performance of FeTiO3-TiO2 / Ti composites degrades reactive blue 160 under UV irradiation and is visible photoelectrocatalytically compared to TiO2. The results of XRD characterization of TiO2 crystals in the form of anatase at 2θ, namely 35.1 ° (110), and the substitution of Fe dopant on TiO2 in the form of anatase and rutile crystals. FTIR data indicated the presence of Fe-O bonds at wave numbers <700 nm. SEM-EDX results showed a thin layer of FeTiO3 was formed, indicating that the dip-coating method was effective in the coating process. The performance of the FeTiO3-TiO2 / Ti electrode has the highest activity against the oxidation process under visible light than the TiO2/Ti electrode. The results of degradation of reactive blue 160 dye with a concentration of 0.5 ppm by photoelectrocatalytic showed that the TiO2 / Ti and FeTiO3-TiO2/Ti electrodes were active in visible irradiation with degradation rate constants of 48% and 69%. Keywords: Electrodes, ilmenite, TiO2 / Ti, degradation, reactive blue 160, photoelectrocatalysis
Preparation of Natural Ouw Clay-Chitosan Composite and Its Application as Lead and Cadmium Metal Adsorbent Catherina M. Bijang; M.F.J.D.P. Tanasale; Adhi G. Kelrey; Inda Ulfa Mansur; Thamrin Azis
Indonesian Journal of Chemical Research Vol 9 No 1 (2021): Edition for May 2021
Publisher : Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598//ijcr.2021.9-bij

Abstract

This study aims to obtain the optimum ratio of Ouw Natural Clay (LAO):Chitosan in the manufacture of chitosan-LAO composites. The composite will be used as an adsorbent for heavy metals Lead (Pb) and Cadmium (Cd). LAO-Chitosan composites were made with the ratio of LAO:Chitosan = 1.25:1, 2.5:1, 5:1. XRD and SEM were carried out for each composite. The performance as a Cd metal adsorbent was determined by calculating the adsorption capacity. Composites with a ratio of 1.25:1 have the best adsorption capacity. The performance as adsorbent for Cd metal was determined by calculating the absorbed Cd concentration. Maximum results are achieved by composites with a ratio of 5:1.
Isolasi dan Identifikasi Senyawa (-)-Asam Usnat dari Lichen Usnea sp. serta Aktivitas Sitotoksiknya terhadap Sel Murine Leukemia P388 MAULIDIYAH MAULIDIYAH; THAMRIN AZIS; SITTI HADIJAH SABARWATI; MUHAMMAD NURDIN
JURNAL ILMU KEFARMASIAN INDONESIA Vol 13 No 1 (2015): JIFI
Publisher : Fakultas Farmasi Universitas Pancasila

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Abstract

Lichen is a symbiotic organism composed by algae and fungi that already known produces spesific secondary metabolites having bioactivities. The aim of this study were to isolate and determine the structure of secondary metabolites of Lichen Usnea sp. and to examine the cytotoxic activity against murine leukemia P388 cells. Isolation was carried out by utilizing colom chromatography using silica gel 60 stationary phase with eluent mixtures of n-hexane and ethyl acetate in a gradient elution. Isolates compounds were identified using UV-Vis spectroscopy, IR, 1H-NMR and 13C-NMR. The identification result obtained was (-)-usnic acid compound with molecular weight (MW) of 344 g/mol, needle-shaped yellow crystals. Test results cytotoxic compound of (-)-usnic acid against murine leukemia P388 cells were derived IC50 5.738 ± 0.61 µg/mL.
SOSIALISASI PRODUK OLAHAN MAKANAN DAN MINUMAN ALAMI SEBAGAI UPAYA PENINGKATAN IMUN DI TENGAH PANDEMI COVID-19 PADA MASYARAKAT KELURAHAN PETOAHA KECAMATAN ABELI KOTA KENDARI SULTRA Muhammad Zakir Muzakkar; Thamrin Azis; Muh. Nurdin; Maulidiyah; Muh. Natsir; Sitti Ratna
Bahasa Indonesia Vol 18 No 01 (2021): Sarwahita : Jurnal Pengabdian Kepada Masyarakat
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/sarwahita.181.5

Abstract

Natural food and beverage processing is the result of natural food processing sourced from family plants which are usually grown in the yard around the house. Natural processed food and beverage products are not only nutritious and nutritional enhancer but also as cooking spices that contain high antioxidants. Utilization of natural processed food and beverage products as an effort to prevent disease, health care during public health emergencies and especially during the national disaster for the corona virus disease 2019 (COVID-19). The socialization of natural processed food and beverage products is carried out in three stages. The first stage is to prepare and select the types of medicinal plants that are often planted by the Petoaha community around the house. The second stage is material education about the benefits of family medicinal plants (TOGA), processed natural food and beverage products, as an effort to increase immunity in the midst of the COVID-19 pandemic. While the last stage is to provide an explanation of how to process food and beverage ingredients and to clarify the use of natural food and beverage processed products as health care, increase immunity and disease prevention during the COVID-19 pandemic. The result of this activity is to increase the knowledge, insight and awareness of the Petoaha community about the importance of planting TOGA plants and their processed food or beverage products to increase immunity during the Covid 19 pandemic. Abstrak Pengolahan makanan dan minuman alami merupakan hasil olahan pangan alami yang bersumber dari tanaman keluarga yang biasanya ditanam di pekarangan sekitar rumah. Produk makanan dan minuman olahan alami tidak hanya berkhasiat dan penambah gizi tetapi juga sebagai bumbu masak yang mengandung antioksidan yang tinggi. Pemanfaatan produk olahan makanan dan minuman alami sebagai upaya pencegahan penyakit, pemeliharaan kesehatan pada saat keadaan darurat kesehatan masyarakat dan khususnya pada saat bencana nasional penyakit virus corona 2019 (COVID 19). Sosialisasi produk olahan makanan dan minuman alami dilakukan dalam tiga tahap. Tahap pertama yaitu menyiapkan dan menyeleksi jenis tanaman obat yang sering ditanam masyarakat Petoaha di sekitar rumah. Tahap kedua adalah edukasi materi tentang manfaat tanaman obat keluarga (TOGA), olahan produk makanan dan minuman alamiah, sebagai upaya peningkatan imunitas di tengah pandemi COVID-19. Sedangkan tahap terakhir yaitu memberikan penjelasan tentang cara mengolah bahan makanan dan minuman serta memperjelas penggunaan produk olahan makanan dan minuman alami sebagai perawatan kesehatan, peningkatan immun dan pencegahan penyakit selama pandemi covid 19. Hasil dari kegiatan ini adalah untuk meningkatkan pengetahuan, wawasan dan kesadaran masyarakat Petoaha tentang pentingnya menanam tanaman TOGA dan produk olahan makanan atau minumannya guna meningkatkan imun pada saat pandemi Covid 19.
Sintesis dan Karakterisasi Bionano Hidroksiapatit (HAp) Secara Insitu Dengan Metode Hidrotermal Laode A. Kadir; Dian Permana; Thamrin Azis
Cokroaminoto Journal of Chemical Science Vol. 4 No. 2 (2022)
Publisher : Universitas Cokroaminoto Palopo

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Abstract

The pokea clamshell contains high calcium content which has the potency to be used as a precursor of calcium in synthesis of hydroxyapatite (HAp). This study aimed to utilize the waste of the pokea clamshells as a precursor of CaO in synthesizing of HAp, and to carry out the characterizations. Analysis of CaO content XRF showed that pokea clamshell after calcination was 94.23% (by weight). The hydrothermal method synthesized HAp confirmed the formation of single phase of HAp as indicated by the sharpness of the phosphate (PO43-) vibration peak at 561.85; 962.01; and 1024.55 cm-1.
Co-Authors A. Nurwahida Aceng Haetami Aden Mula Pratiwi Adhi G. Kelrey Alimin C Bijang C Bijang Caterina Bijang Catherina Bijang Catherina M. Bijang Dewi Sri Dewi, Dian Puspita Dian Permana Fajrin E. Rosa Halimatussaddiyah R Haris W Holilah Holilah, Holilah Imran Imran Imran Imran Imran Imran Inda Ulfa Mansur Irwan Irwan Juwita, Citra Keke Awaliyah La Aba La O. Ahmad La Ode Abd Kadir La Ode Abd Kadir La Ode Abd Kadir La Ode Abd Kadir La Ode Ahmad La Ode Kadidae La Ode Kadidae La Ode Santiaji Bande La Rudi Laily Nurliana Laily Nurliana Laode A. Kadir Laode A. Kadir Laode Abdul Kadir Laode Abdul Kadir M. Natsir M.F.J.D.P. Tanasale Matheis F. J. D. P. Tanasale Maulidiyah Maulidiyah Maulidiyah MAULIDIYAH MAULIDIYAH Maulidiyah Maulidiyah Muh Natsir Muh. Natsir Muh. Natsir Muh. Natsir Muh. Nurdin Muh. Zakir Muzakkar Muhammad Nurdin Muhammad Nurdin Muhammad Nurdin Muhammad Zakir Muzakkar Muhammad Zakir Muzakkar Muhammad Zakir Muzakkar Muzakkar, Muhammad Zakir Nasriadi Dali Wela Nasriadi Nasriadi Nohong Nohong Nohong Nohong Nohong Nohong Nur Illyyin Akib Nurhaeni Ratna Ratna Ratna Ruslan Ruslan Ruslan Ruslin Ruslin SITTI HADIJAH SABARWATI Sitti Ratna Sri Wahyuni T Nurwahida Tahril Ulfa H. Syam Viesta Valentin Octavian Wa Ode Harlis Zul Arham