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All Journal Agroland : Jurnal Ilmu-Ilmu Pertanian Biocelebes KOVALEN: Jurnal Riset Kimia
Mappiratu Mappiratu
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Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Chemistry

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KAJIAN METODE GRAVIMETRI DALAM ANALISIS KADAR KARAGINAN RUMPUT LAUT Eucheuma cottonii Ernawati A. H. Bana; Mappiratu Mappiratu; Prismawiryanti Prismawiryanti
KOVALEN: Jurnal Riset Kimia Vol. 1 No. 1 (2015)
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

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ABSTRAK Telah dilakukan penelitian tentang kajian metode gravimetri dalam analisis kadar karaginan rumput laut Eucheuma cottonii. Peneltian ini bertujuan untuk mendapatkan tingkat pemekatan dan rasio etanol/ekstrak pekat yang paling baik digunakan dalam penetapan kadar karaginan rumput laut Eucheuma cottonii. Penelitian dua faktor masing-masing faktor tingkat pemekatan dan faktor rasio etanol/ekstrak pekat, yaitu 30%, 40%, 50%, 60%, 70% dan 1,5 : 1; 2,0 : 1; 2,5 : 1; 3,0 : 1; dan 3,5 : 1. Kadar karaginan ditentukan menggunakan metode gravimetri, hasil yang diperoleh menunjukkan  tingkat pemekatan yang memberikan kadar karaginan tertinggi yaitu 50% dan rasio etanol/ekstrak pekat yaitu 3,5 : 1 yang menghasilkan kadar karaginan tinggi (51,752). Kata kunci: Eucheuma cottonii,Ekstraksi karaginan, Rasio etanol
KAJIAN DAYA SERAP ARANG TEMPURUNG KEMIRI (Aleorites Moluccana) TERHADAP ION BESI (III) DAN ION TIMBAL (II) PADA BERBAGAI WAKTU KONTAK Yuniar Yuniar; Mappiratu Mappiratu; Nurhaeni Nurhaeni
KOVALEN: Jurnal Riset Kimia Vol. 1 No. 1 (2015)
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

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ABSTRAK Telah dilakukan penelitian Kajian Daya Serap Arang Tempurung Kemiri (Aleorites Moluccana) Terhadap Ion Besi (III) dan Ion Timbal (II) pada Berbagai Waktu Kontak. Penelitian ini bertujuan untuk mengetahui waktu kontak antara ion logam berat dengan arang tempurung kemiri yang menghasilkan daya serap tinggi. Waktu kontak yang digunakan adalah 10, 20, 30, 40 dan 50 menit. Waktu kontak yang terbaik pada logam Fe adalah 40 menit dan  pada logam Pb adalah 50 menit.  Hasil yang di peroleh menunjukkan bahwa semakin lama waktu kontak maka semakin banyak ion logam terserap. Kata kunci : Daya serap, Arang tempurung kemiri, Waktu kontak
OPTIMALISASI PRODUKSI SEMI REFINED CARAGINAN (SRC) DARI RUMPUT LAUT( Eucheuma cottonii) Moh. Rizal; Mappiratu Mappiratu; Abd. Rahman Razak
KOVALEN: Jurnal Riset Kimia Vol. 2 No. 1 (2016)
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

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ABSTRACT The investigation about the optimization of SRC Production (semi refined caraginan) from Eucheuma cottonii has beendone. The study aim to find whether or not there is interaction beetween consentration KOH and cooking time on rendamen and SRC purity degree and to find at which consentration KOH and cooking time yield the highest SRC Purity  degree. It was done by applying completely randomized design (CRD) i. e factorial design. It was consist of 2 factors ( consentration KOH and cooking time ). Each factors consist of 3 levels and all of experiments where done in duplo, so the total there ware 18 experiments. The result showed that The highest Rendaman and the highset degree of piyurity were obsained at consentration KOH and cooking time were 8 % and 60 minutes respectively. The result were 33.83 and 59.243 % accordingly Keywords : Eucheuma cottonii, Extraction Semi Refined Carrageenan, KOH concentration, Long time of cooking
KAJIAN SINTESIS GIPSUM DARI BATU GAMPING ASAL SULAWESI TENGAH Gloria Yoanita; Mappiratu Mappiratu; Prismawiryanti Prismawiryanti
KOVALEN: Jurnal Riset Kimia Vol. 2 No. 1 (2016)
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

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ABSTRACT Research has been done for synthesis gypsum from limestone in Central Sulawesi. This Research aims are to know the best ratio of sulphuric acid of limestone that producer the highest CaSO4 and which areas in the Central Sulawesi as a producer of best limestone for the raw materials CaSO4. Variation ratio of sulphuric acid used is 70:25, 80:25, 90:25, 100:25, and 110:25. This Research using a group randomized design (GRD). The treatment was applied variations from limestone on the 3 areas, that is limestone from Bangkep (group 1), limestone from Buol (group 2) and limestone from Donggala (group 3). The purity of CaSO4 be analiyzed using AAS and uv-vis Spectrofotometri. The result showed that the best ratio of sulphuric acid is 110:25 and producer area of the best limestone for the raw materials of CaSO4 in the Bangkep. Keywords: Gypsum, Limestone, Sulfuric Acid, Yield, Purity
RETENSI ASAM EIKOSAPENTAENOAT (EPA) TORTILLA TEPUNG IKAN LELE SELAMA PENGOLAHAN DAN PENYIMPANAN PADA SUHU RUANG Lutvina Vitasari; Mappiratu Mappiratu; Ni Ketut Sumarni
KOVALEN: Jurnal Riset Kimia Vol. 2 No. 2 (2016)
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

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A research on the retention of eicosapentaenoic acid (EPA) on theprocessing and storage of functional tortillas.This study aims to determine the retention of eicosapentaenoic acid (EPA)flour tortillas catfish during processing and storage at room temperature.The research method includes the step of making flour catfish, processing tortillas and tortilla storage at room temperature.Analysis eicosapentaenoic acid in the tortilla is done every 7 days for 56 days using Gas Chromatography.The Results obtained indicated eikosa penta enoic acid were demaged during processing tortillas with the level of demage 9,17%. Tortillas storage at room temperature for 56 days lead to demage 31,97% EPA.Keywords: Eicosapentaenoic Acid, Retention, Tortilla
KARAKTERISASI EKSTRAK ETANOL BUNGA TANAMAN TEMBELEKAN (Lantana camara L.) Asmi Randa Sosang; Mappiratu Mappiratu; Ruslan Ruslan
KOVALEN: Jurnal Riset Kimia Vol. 2 No. 2 (2016)
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

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Research on the characterization of the ethanol extract of the flowers of tembelekan (Lantana camara L) has done. This study aims are to determine: (1) the functional group and the absorption spectrum of ethanol extract of flowers tembelekan, (2) the type of eluent used for separating the colored substance ethanol extracts of flowers tembelekan by TLC, (3) absorption spectrum and FTIR extracts and results of separation preparative TLC. Achievement of the objectives is done through the ethanol extract of flowers tembelekan by maceration, followed by taking the spectrum of UV-Vis and FTIR as well as analysis by TLC. The results showed extract ethanol absorbs light at a wavelength of 330 nm which gives an indication that there is a possibility flavonoids, flavonols and flavones. Good eluent use in the separation of components using preparative TLC were eluent a mixture of butanol / acetic acid / water = 4: 1: 5 (v / v / v), which gives an indication of at least one type of compounds in the extract, such as yellow, which has a functional group the free hydroxy group, bonded hydrogen bonding and group C=O.Keywords : flower extract tembelekan , TLC , FTIR spectra
KAJIAN KANDUNGAN FENOLAT DAN AKTIVITAS ANTIOKSIDAN EKSTRAK ETANOL TEMPE GEMBUS DARI BERBAGAI WAKTU INKUBASI Mohammad Sidiq; Mappiratu Mappiratu; Nurhaeni Nurhaeni
KOVALEN: Jurnal Riset Kimia Vol. 2 No. 3 (2016)
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

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The research about study of content phenolic and antioxidant activity extract ethanol tempeh gembus of a variety of incubation has been done. This study aims to know the time of incubation and time extraction that produced levels of the total phenolic and the best antioxidant activity. Determination of total phenolic using the method of folin-ciocalteu and antioxidant activity using the method DPPH. The achievement of goals be done through the application of the treatment of the time of incubation and time extraction of level of phenolic and antioxidant activity. The influence of the time of incubation is applied five levels of 0 hours; 12 hours; 24 hours; 36 hours and 48 hours. While the influence of time extraction is 1 hours, 1.5 hours, 2 hours, 2.5 hours, and 3 hours. From the result obtained by the incubation is at the time of incubation 36 hours which resulted in levels of total phenolic of 7.75 % and the value of IC50 0f 1098.88 µg/mL. The use of time extraction is 1,5 hours that produces levels of total phenolic of 5.26 % and the value of IC50 of 1198.95 µg/mL.Keyword: tempeh gembus, total phenolic, antioxidant activity, time of incubation, time extraction
PEMANFAATAN GETAH BIDURI DALAM PRODUKSI ALBUMIN IKAN GABUS (Ophiocephalus striatus) Ita Mustrini; Mappiratu Mappiratu; Nurakhirawati Nurakhirawati
KOVALEN: Jurnal Riset Kimia Vol. 2 No. 3 (2016)
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

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The Research about utilization of sap Biduri in the production of albumin fish cork (Ophiocephalus striatus). Has been done This research  purposes to determine the ratio of sap Biduri to extract cork fish that produce the protein albumin with the highest yield and optimum heating time which produces the highest yield of the protein albumin. The study used a completely randomized design (CRD), which consists of the influence of the ratio of sap Biduri to extract protein and the effect of heating time Biduri to extract latex mixture. Each treatment is done twice to obtain 22 units of the experiment. The highest protein yield was obtained at a ratio of sap Biduri 3,0 : 30 and the heating time of 60 minutes at 53,43 %. The purity of the highest degree obtained at the optimum 50 minutes warm up period of 35.50 %.Keywords : Fish Cork, Biduri Protease enzyme, Protein yield of albumin, Albumin purity degree
PRODUKSI METIL OLEAT MELALUI REAKSI METANOLISIS MINYAK BIJI KELOR (Moringa oleifera Lam) Fatiah Riskah; Ahmad Ridhay; Mappiratu Mappiratu; Erwin Abdul Rahim
KOVALEN: Jurnal Riset Kimia Vol. 5 No. 1 (2019): Edisi April
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (656.369 KB) | DOI: 10.22487/kovalen.2019.v5.i1.14561

Abstract

Telah dilakukan penelitian yang bertujuan untuk mendapatkan fraksi massa metil ester asam oleat tertinggi dari rasio minyak biji kelor/metanol (v/v) serta waktu reaksi dalam proses metanolisis minyak biji kelor serta komposisi dari metil ester asam oleat. Penelitian ini dilakukan dengan menggunakan Rancangan Acak Lengkap (RAL) dengan variasi rasio minyak biji kelor/metanol 1:3, 1:4, 1:5, 1:6 dan 1:7 (v/v) serta variasi waktu reaksi 30 menit, 60 menit, 90 menit, 120 menit dan 150 menit. Hasil yang diperoleh menunjukkan bahwa peningkatan rasio minyak biji kelor/metanol  meningkatkan fraksi massa metil ester asam oleat dengan fraksi massa maksimum (72.61%) terdapat pada penggunaan rasio minyak biji kelor/metanol 1:7 (v/v). Demikian pula pada pengaruh waktu reaksi yang menunjukkan bahwa peningkatan waktu reaksi meningkatkan fraksi massa metil ester asam oleat dengan fraksi massa maksimum (78.75%) terdapat pada penggunaan waktu reaksi 150 menit. Berdasarkan hasil analisis GC-MS diperoleh senyawa dominan penyusun metil ester tersebut adalah metil oleat persentase sebesar 48.25%, kemudian metil stearat dengan persentase sebesar 7.67%, selanjutnya metil palmitat dengan persentase sebesar 5.14 dan senyawa yang belum diketahui secara pasti dengan persentase sebesar 38.94%Kata Kunci: Minyak biji kelor, metil oleat,metanolisis
Kespesifikan Biokatalis Dedak Padi dalam Reaksi Pembentukan Antibakteri Monoasilgliserol dari Minyak Kelapa mappiratu mappiratu
Biocelebes Vol. 3 No. 1 (2009)
Publisher : Biology Department, Mathematics and natural science, Tadulako University

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In an effort to analyse the spesification of rice bran lypase and antibacterium activity of monoacylglyserol (MAG) produced from various reaction time, it has been performed glyserolysis of coconut oil for 192 h with observation interval 24 h. It was recorded that lypase of rice bran of variety Maros had a higher spesification for formation of short and intermediate chain monoacylglyserols (MAGs) than sature and unsature long chain MAGs. MAG inhibition on Bacillus cereus and Staphillococcus aureus reached optimum at 72 h reaction time, whilst Vibrio cholerae reached optimum at 192 h and it was insignificantly different with 48, 144 and 168 h. MAG inhibition on the three bacteria strains reached minimum at 92 h. During the reaction period, antimicrobial MAG reached minimum. Key words: Spesification, biocatalyses, rice bran, antibacterium MAG, coconut oil.
Co-Authors Abd. Rahman Razak Abdul Rahim Ahmad Ridhay Amalia Noviyanty Asmi Randa Sosang Ernawati A. H. Bana Erwin Abdul Rahim Fatiah Riskah Gloria Yoanita Ita Mustrini Lutvina Vitasari Moh. Rizal Mohammad Sidiq Ni Ketut Sumarni Nur Alam Nurakhirawati Nurakhirawati Nurhaeni Nurhaeni Prismawiryanti Prismawiryanti Ruslan Ruslan Yuniar Yuniar