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All Journal Natural Science: Journal of Science and Technology KOVALEN: Jurnal Riset Kimia KAIBON ABHINAYA : JURNAL PENGABDIAN MASYARAKAT

Prismawiryanti Prismawiryanti

Jurusan Kimia FMIPA Universitas Tadulako

Author-ID : 347670

Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Economics, Econometrics & Finance

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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 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

PRODUKSI GLUKOSA DARI JERAMI PADI (Oryza sativa) MENGGUNAKAN JAMUR Trichoderma sp. Yuli Rismawati; Syaiful Bahri; Prismawiryanti Prismawiryanti
KOVALEN: Jurnal Riset Kimia Vol. 2 No. 2 (2016)
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

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Research glucose production from rice straw (Oryza sativa) using Trichoderma sp. has conducted. This study aime is to determine the effect konsentrasi Trichoderma sp. And a straw fermentation of rice (Oryza sativa) against production. Research glucose levels was done using a completely randomized design (CRD) with factorial pattern 4 variation of the concentration of Trichoderma sp. (0%, 24%, 36% and 48%) and fermentation time (3, 4, 5and6 weeks), glucose levels were analyzed using DNS with UV-Visible spectrophotometry. The measurement results showed that the highest glucose levels obtained at various concentration Trichoderma sp. 36% fermentation time during the five week sthat is equal to 14.525%. There is a positive interaction between the concentration of Trichoderma sp. and the fermentation time, the best combination of time and fungal concentration of 5 weeks and 36%, respectively.Keywords : Rice straw, Trichoderma sp., Fermentation, DNS, Spectrophotometer Uv-Visibel, Glucose.

HIDROLISIS SELULOSA DARI SEKAM PADI (Oryza sativa) MENJADI GLUKOSA DENGAN KATALIS ARANG TERSULFONASI Adeks Pramana; Abdul Rahman Razak; Prismawiryanti Prismawiryanti
KOVALEN: Jurnal Riset Kimia Vol. 2 No. 3 (2016)
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

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Cellulose hydrolysis from rice husk (Oryza sativa) into glucose with sulfonated charcoal catalyst was conducted. The aim of this research was to determine sulfuric acid concentration and contact time on the sulfonation process of charcoal which would produce the highest glucose rendement from cellulose hydrolysis of rice husk. Sulfuric acid concentrations in this experiment were 8, 10, and 12 N with variation of contact time of 4, 6, 8, 10 and 12 hours respectively. Rice husk was delignified with NaOH 10% to produce cellulose which was hydrolyzed by sulfonated charcoal catalyst. Hydrolysis reaction with the ratio cellulose/aquadest 1:25 (w/v) was conducted in autoclave with temperature 130 oC for 3 hours. The result showed that 8 N concentration of sulfuric acid and 12 hours of contact time produced the highest glucose rendement 17,9%. Keywords : rice husks, cellulose, glucose, sulfonated charcoal

SINTESIS KARBOKSIMETIL SELULOSA (CMC) DARI SELULOSA KULIT DURIAN (Durio zibethinus) Dini Safitri; Erwin Abdul Rahim; Prismawiryanti Prismawiryanti; Rismawati Sikanna
KOVALEN: Jurnal Riset Kimia Vol. 3 No. 1 (2017): Edisi April
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

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The investigation about of carboxymethyl cellulose (CMC) of Durian peel (Durio zibethinus) cellulose has been done. The research aim is to determine the best ratio of sodium mono-chloroacetate toward cellulose and is to determine the reaction time in the synthesis of carboxymethyl cellulose of durian peel in order to obtain the highest substitution degree. The applied of ratio variations and reaction time were 5:5, 6:5, 7:5, 8:5, 9:5 grams and 1, 2, 3, 4, 5, respectively. The result showed that the best ratio of sodium mono-chloroacetate toward cellulose was 7:5 gram with yields and the substitution degree of 39.39% and 1.17, respectively. The best time reaction was found at 4 hours with yields and the substitution degree of 39.77 % and 1.2, respectively. Keywords: Durian peel, carboxymethyl cellulose, substitution degree.

APLIKASI SELULOSA BAKTERIAL-DIETILENTRIAMINA SEBAGAI LAPISAN PENGIKAT LOGAM Pb DAN Cd PADA METODE DIFFUSIVE GRADIENT IN THIN FILMS (DGT) Khairuddin Khairuddin; Prismawiryanti Prismawiryanti; Indriani Indriani
KOVALEN: Jurnal Riset Kimia Vol. 3 No. 1 (2017): Edisi April
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

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This research aimed to synthesis and apply of bacterial cellulose-diethylenetriamine as a binding layer on the diffusive gradients in thin films method for preconcentration of labile metal Pb and Cd in aquatic systems and sediment of Palu Bay. The results are expected to be used for the analysis of environmental contaminants aquatic pollutant/sediment replace conventional methods. DGT method easily carried into the field and sensitive to identify certain metal ions. The results showed concentration of heavy metals dissolved in seawater for Pb between 0.024 to 0.048 mg / L, while for Cd between 0.006 to 0.015 mg / L. The concentration of Pb in sediments from 7.426 to 16.043 mg / L and Cd 0.387 to 0.950 mg / L. Partial regression analysis between Pb and Cd concentrations in water with a concentration of cadmium metals Pb and Cd in the sediments showed that the concentration of heavy metals in water has a positive correlation with the concentration of Pb and Cd in the sediment.Keyword: Pb, Cd, DGT, bacterial cellulose-diethylenetriamine, Palu Bay

EKSTRAKSI DAN UJI STABILITAS BETASIANIN DALAM EKSTRAK BUAH KAKTUS (Opuntia elatior Mill.) Patrisia Marcevin Rengku; Ahmad Ridhay; Prismawiryanti Prismawiryanti
KOVALEN: Jurnal Riset Kimia Vol. 3 No. 2 (2017): Edisi Agustus
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

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Telah dilakukan penelitian tentang ekstraksi dan uji stabilitas ekstrak buah kaktus (Opuntia elatior Mill.). Penelitian ini bertujuan untuk mengetahui pengaruh variasi pelarut (etanol; campuran etanol : air; dan air) terhadap kadar betasianin dalam ekstrak buah kaktus. Ekstraksi dilakukan dengan metode maserasi selama 72 jam pada semua variasi pelarut. Hasil terbaik dari perlakuan di atas kemudian dilakukan pengujian stabilitas betasianin terhadap cahaya dan pH. Pengujian stabilitas terhadap cahaya dilakukan dengan pemaparan betasianin ekstrak buah kaktus dibawah sinar matahari langsung selama 5 jam dengan variasi wadah penyimpan, yaitu botol cokelat dan botol bening. Analisis kadar betasianin dilakukan setiap 1 jam. Pengujian stabilitas betasianin terhadap pH dilakukan dengan cara penyimpanan sampel selama 72 jam dengan variasi pH 3, 4, 5, 6. 7 dan 8. Kadar betasianin tertinggi diperloleh menggunakan pelarut air yaitu sebesar 15,42 mg/100g. Betasianin tidak stabil terhadap paparan cahaya matahari dimana kadar betasianin berkurang sebanyak 47,35% pada botol cokelat dan 66,93% pada botol bening setelah 5 jam penyimpanan. Betasianin stabil pada kondisi pH 4, 5 dan 6 dengan penurunan kadar betasianin masing-masing sebesar 15,82%, 14,25% dan 15,71%. Kata Kunci : Buah Kaktus (Opuntia elatior Mill.), Ekstraksi, Stabilitas Betasianin

UJI AKTIVITAS ANTIBAKTERI EKSTRAK DAUN TANAMAN JOHAR (Cassia siamea Lamk.) DARI BEBERAPA TINGKAT KEPOLARAN PELARUT Fitriah Fitriah; Mappiratu Mappiratu; Prismawiryanti Prismawiryanti
KOVALEN: Jurnal Riset Kimia Vol. 3 No. 3 (2017): Edisi Desember
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

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A research about antibacterial activity test of johar plant leaf extract (Cassia siamea Lamk.) using several levels of solvent polarity has been implemented. This study aims to determine whether the antibacterial compounds in the leaves is polar, non-polar or semi-polar, and to determine the highest inhibition level of johar leaf extract on both the gram-negative bacteria (Escherichia coli and Shigella dysenteriae) and gram-positive (Staphylococcus aureus and Micrococcus luteus). The maceration method was used in this research with 3 levels of solvent polarity namely non-polar, semi-polar and polar. The bacterial activity test was done with diffusion method. The results showed that the johar leaf contains antibacterial compounds which are polar and semi-polar. The highest inhibition level was obtained at johar leaf ethanol extract for Staphylococcus aureus, Escherichia coli, Micrococcus luteu and Shigella dysentriae of 14.9, 12.9, 12, and 7.2 mm, respectively.Keywords: Antibacterial, Inhibition Level, Johar Leaf Extract

MODIFIKASI PATI SUKUN (Artocarpus altilis) MENGGUNAKAN ANHIDRIDA ASAM ASETAT DAN APLIKASINYA PADA PEMBUATAN MIE Nurhaeni Nurhaeni; Pratiwi Dwiasmukti; Prismawiryanti Prismawiryanti
KOVALEN: Jurnal Riset Kimia Vol. 4 No. 1 (2018): Edisi April
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Penelitian tentang modifikasi pati sukun (Artocarpus altilis) menggunakan anhidrida asam asetat dan aplikasinya pada pembuatan mie telah dilakukan. Penelitian ini bertujuan untuk mengetahui konsentrasi anhidrida asam asetat terbaik dalam menghasilkan kadar asetil dan derajat substitusi tinggi. Penelitian ini menggunakan Rancangan Acak Lengkap (RAL) yaitu konsentrasi anhidrida asam asetat terdiri atas 5 taraf (0,05%; 0,10%; 0,15%; 0,20% dan 0,25%) dilakukan sebanyak 2 kali pengulangan untuk masing-masing taraf sehingga didapatkan 10 unit percobaan. Hasil penelitian menunjukan konsentrasi anhidrida asam asetat terbaik diperoleh pada 0,25% dengan kadar asetil 5,75%, dan derajat substitusi 0,23. Hasil uji organoleptik pada parameter rasa dan tekstur, mie pati sukun asetat lebih disukai dibandingkan dengan mie pati alami. Kata Kunci : Sukun, pati sukun asetat, kadar asetil,derajat substitusi.

KADAR LIKOPEN EKSTRAK KASAR BUAH TOMAT DALAM VCO (VIRGIN COCONUT OIL) PADA PERENDAMAN SUHU RUANG Enni Indriani; Ruslan Ruslan; Prismawiryanti Prismawiryanti; Pasjan Satrimafitrah
KOVALEN: Jurnal Riset Kimia Vol. 4 No. 2 (2018): Edisi Agustus
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Likopen merupakan salah satu senyawa karotenoid yang dapat berperan sebagai antioksidan yang memiliki sifat larut dalam minyak karena bersifat lipofilik. Penelitian ini memproduksi likopen yang berasal dari ekstrak kasat buah tomat dengan merendamnya dalam VCO. Tujuan penelitian ini untuk mengetahui rasio terbaik dariekstrak kasar buah tomat terhadap VCO dalam menghasilkan likopen, dan juga waktu ekstraksi untuk menghasilkan konsentrasi likopen tertinggi dari ekstraksi atau perendaman ekstrak kasar buah tomat dalam VCO pada suhu ruang. Rasio antara ekstrak kasar buah tomat dan VCO adalah 1:40, 2:40, 3:40, 4:40, 5:40 (b/v) dengan masa ekstraksi mencapai 7 minggu. Hasil penelitian menunjukkan rasio ekstrak likopen kasar buah tomat terbaik pada penelitian ini yaitu 5:40 dan waktu ekstraksi terbaik adalah pada minggu pertama, dengan kadar likopen tertinggi sebesar 0,283 g.Kata kunci: Ekstrak tomat, likopen, VCO, waktu perendaman

Co-Authors Abd. Rahman Razak Abdul Rahman Razak Adeks Pramana Agriyani Marcelinda, Agriyani Ahmad Ridhay Aksan Y Maradang Andarwati, Sophia Andi Tenri Ajeng Angria Deswika Malambu Arianto Asniawati Asniawati Dini Safitri Dwi Juli Puspitasari Dwi Juli Pusptasari Eka Surya Wahyuningsih Enni Indriani Ernawati A. H. Bana Erwin Abdul Rahim Firmansyah Firmansyah Fitra Langgeng Mangesti Fitriah Fitriah Frischa Sari Kencana Gloria Yoanita Hajrah Hajrah Hardi Ys Hardi Ys. Heince Andre Pua Husain Sosidi Husain Sosidi Inda, Nov Irmawati Indriani Indriani Indriani Indriani Jaya Hardi Jusman, Jusman Khairuddin Khairuddin Krisma Meylin Lasampa Laksono Trisnantoro Lisma Habiba Mappiratu Mappiratu Mappiratu Mappiratu Marsela, Anggi Moh Iqbal Moh Mirzan Moh. Mirzan Moh. Mirzan Moh. Mirzan Muh.Ricky Arisandi M. Tahili Nanda Novita Nea, Sirah Diniati Ni Ketut Sumarni Nov Irmawati Inda Nov Irmawati Inda Novaldi Novaldi Nurhaeni Nurhaeni Nurhaeni Nurhaeni Nurhaeni Nurhalisa, Sitti Pasjan Satrimafitrah Patrisia Marcevin Rengku Pratiwi Dwiasmukti Putri Wahyuni Ramadanil Riski, Mutiara Zalfa Rismawati Sikanna Rismawati Sikanna Rudy, Sri Utami Ruslan Ruslan Ruslan Sandi Purnawan Sriwulan Indriani Pea Syaiful Bahri Syamsuddin Syamsuddin Syamsuddin Sylvia Florensy Bawias Umma Fahriah Soleh Wahyu Harso WILDA YANTI Yuli Rismawati

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