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All Journal VALENSI Natural Science: Journal of Science and Technology Jurnal Spektran The Journal of Pure and Applied Chemistry Research MPI (Media Pharmaceutica Indonesiana) KOVALEN: Jurnal Riset Kimia Jurnal Kimia Mulawarman Indonesian Journal of Chemistry Jurnal Ilmiah Teknik Kimia Sewagati

Ni Ketut Sumarni

Department Of Chemistry, Tadulako University, Jl. Sukarno-Hatta Km 9, Palu 94148, Central Sulawesi, Indonesia

Author-ID : 329959

Arts Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Engineering Health Professions Immunology & microbiology Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Medicine & Pharmacology Public Health Social Sciences Other

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PERSEN DEGRADASI EKSTRAK ETANOL KELOPAK BUNGA ROSELLA (Hibiscus sabdariffa L.) SELAMA PENYIMPANAN THE PERCENTAGE OF ETHANOL EXTRACTS OF ROSELLE PETALS (Hibiscus sabdariffa L.) DURING STORAGE firmasari firmasari; Ni Ketut Sumarni; Ruslan; Hardi Ys
KOVALEN: Jurnal Riset Kimia Vol. 5 No. 2 (2019): Edisi Agustus
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Ethanol extract of roselle petals (Hibiscus sabdariffa L.) is more stable in low pH than in high pH. The research aims to monitor and determine the effect of ratio content in ethanol extract of roselle petals (Hibiscus sabdariffa L.) in tomato sauce and the pH effect on the percentage of ethanol extract degradation during storage. Two independent variables implemented in this study, are ratio content of ethanol extract of roselle petals (Hibiscus sabdariffa L.) in tomato sauce and pH. Ethanol extract of roselle petals (Hibiscus sabdariffa L.) in tomato sauce with ratio content 0,5:1; 1:1; and 1:0 (w/w) and adjusted to pH 2, pH 3, pH 4, pH 5 and pH 6, respectively were investigated. The absorbance measurement of Ethanol extract of roselle petals (Hibiscus sabdariffa L.) in tomato sauce was depend on each treatment, then analyzed using completely randomized design. The percentage of ethanol extract of roselle petals (Hibiscus sabdariffa L.) degradation in tomato sauce decreased in ratio content 1:0 (w/w) at pH 2 with percentage content of degradation is 30.09%. Furthermore, after 10 days of storage, the highest percentage of ethanol extract of roselle petals (Hibiscus sabdariffa L.) in tomato sauce degradation is 93.33% with ratio content is 0.5:1 at pH 6 and the lowest is 30.09% with ratio content 1:0 at pH 2. Keywords: Roselle petals, Ethanol Extract, Tomato Sauce, Percentage of Degradation

EKSTRAKSI DAN KARAKTERISASI PEKTIN DARI KULIT BUAH KLUWIH (Artocarpus camansi Blanco) Yesy Febriyanti; Abd. Rahman Razak; Ni Ketut Sumarni
KOVALEN: Jurnal Riset Kimia Vol. 4 No. 1 (2018): Edisi April
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Telah dilakukan penelitian tentang ekstraksi dan karakterisasi pektin dari kulit buah kluwih (Artocarpus camansi Blanco). Penelitian ini bertujuan untuk mengetahui rasio dan waktu terbaik yang diperlukan untuk menghasilkan ekstrak pektin dengan rendemen tertinggi. Penelitian ini menggunakan Rancangan Acak Lengkap (RAL) yang terdiri atas 2 faktor yaitu rasio perbandingan sampel terhadap pelarut dan waktu ekstraksi yang masing–masing dilakukan sebanyak 3 kali. Hasil penelitian menunjukan bahwa rasio terbaik diperoleh pada perbandingan 1:50 b/v dengan rendemen pektin 47,2% dan waktu terbaik diperoleh pada 120 menit dengan rendemen 48,30%. Hasil karakterisasi pektin yang diperoleh antara lain yaitu kadar air 1,55%, kadar abu 2,2 %, berat ekivalen 609,99 mg, metoksil 11,49%, kadar galakturonat 42,47%, derajat esterifikasi 47,65% dan berat molekul 16.177,83 g/mol.Kata Kunci : ekstraksi, karakterisasi, pektin, kluwih.

EFISIENSI MIKROKAPSUL EKSTRAK ETANOL KELOPAK BUNGA ROSELLA (Hibiscus sabdariffa Linn) TERSALUT KARAGINAN KASAR (Eucheuma cottoni) Ni Ketut Sumarni; Yana Silvia Mauru; Dwi Juli Puspitasari; Diharnaini Diharnaini
KOVALEN: Jurnal Riset Kimia Vol. 4 No. 2 (2018): Edisi Agustus
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Penelitian tentang efisiensi mikrokapsul ekstrak etanol kelopak bunga rosella (Hibiscus sabdariffa Linn) tersalut karaginan kasar (Eucheuma cotonii ) telah dilakukan. Penelitian ini bertujuan menentukan efisiensi tertinggi dari mikroenkapsulasi berdasarkan rasio ekstrak etanol kelopak bunga terhadap karaginan kasar sebagai penyalut. Mikroenkapsulasi dilakukan dengan menggunakan teknik pembekuan kering. Enkapsulasi ini diharapkan dapat mempertahankan senyawa aktif ekstrak etanol. Rasio dari ekstrak etanol terhadap karaginan kasar dilakukan pada 1:3; 1:4; 1:5; 1:6 dan 1:7; (b/b). Hasil penelitian diperoleh bahwa rasio 1:7 menghasilkan efisiensi tertinggi, yaitu 86,01%.Kata kunci: Ekstrak etanol , karaginan kasar, efisiensi

PENGARUH SUHU INKUBASI TERHADAP AKTIVITAS LIPASE DAUN PEPAYA (Carica papaya L) YANG DIAMOBILISASI DALAM PASIR LAUT Fisty Sumangkut; Nurhaeni; Ni Ketut Sumarni; Erwin Abdul Rahim
KOVALEN: Jurnal Riset Kimia Vol. 5 No. 2 (2019): Edisi Agustus
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

The silica content in sea sand can be used to immobilize lipase from papaya leaf. Research on the influence of incubation temperature on sea sand immobilized lipase from papaya leaf (Carica papaya L) has been carried out. The aim of research is determining the influence of incubation temperature on sea sand immobilized lipase from papaya leaf (Carica papaya L). The method used in this study was a completely randomized design with temperature at 30, 40, 50, 60, 70°C. The results show that lipase from papaya leaf (Carica papaya L) had successfully immobilized in the sea sand and the optimum temperature stability of lipase immobilized in sea sand at 50°C with an activity is 53.000 µmol/g.jam Keywords : immobilized, lipase, papaya leaf, sea sand.

MIKROENKAPSULASI EKSTRAK LIKOPEN BUAH TOMAT (Lycopersicum pyriforme) TERSALUT TEPUNG RUMPUT LAUT Eucheuma cottonii Ni Ketut Sumarni; Novitaliani Kea; Syaiful Bahri
KOVALEN: Jurnal Riset Kimia Vol. 5 No. 1 (2019): Edisi April
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Likopen merupakan senyawa bahan alam yang mudah mengalami kerusakan akibat perubahan suhu dan waktu simpan. Kerusakan tersebut dapat diatasi dengan proses mikroenkapsulasi menggunakan penyalut, salah satunya tepung rumput laut. Tujuan dari penelitian ini untuk menentukan efisiensi penyalutan tertinggi berdasarkan rasio likopen terhadap tepung rumput laut. Metode penyalutan dilakukan menggunakan freeze dryng, dengan rasio likopen terhadap tepung rumput laut 1:5; 2:5; 3:5; 4:5 atas dasar (b/b). Analisis kadar likopen dalam mikrokapsul dilakukan selama 4 minggu. Hasil analisis menunjukan bahwa efisiensi penyalut tertinggi pada rasio 1:5 dengan persentase 10,686% dan kinetika degradasi likopen tersalut tepung rumput laut mengikuti kinetika reaksi orde nol.Kata kunci: Ekstrak likopen,tepung rumput laut, mikroenkapsulasi

EKSTRAKSI DAN KARAKTERISASI KARAGENAN KASAR RUMPUT LAUT Eucheuma cottoni Asri jaya; Ni Ketut Sumarni; Ahmad Ridhay
KOVALEN: Jurnal Riset Kimia Vol. 5 No. 2 (2019): Edisi Agustus
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Research on extraction and characterization of crude carrageenan from seaweed (eucheuma cottoni) has been carried out. The research aims to determine the optimum extraction time and temperature of crude carrageenan extract from seaweed (eucheuma cottoni). Crude Carrageenan was extracted from seaweed (eucheuma cottoni) by dissolving crushed seaweed in 8% KOH with variation of extraction times are 1 hour, 1.5 hours, 2 hours, 2.5 hours and 3 hours, and temperatures are 50, 70, 90, 110 and 130oC. The results were analyzed using a Completely Randomized Design (CRD). The results show that the optimum extraction time in producing the best quality of crude carrageenan is 2 hours at 50oC with percentage is 78.4%, viscosity is 9.155 cP, sulphate content is 3.102% and gel strength is 7 g. Keywords : eucheuma cottoni seaweed, crude carrageenan, characterization

APLIKASI LIKOPEN TERSALUT MALTODEKSTRIN DARI BUAH TOMAT APEL (Lycopersicum pyriforme) DALAM PENGOLAHAN BUBUR JAGUNG MUDA INSTAN Anita Anita; Mappiratu Mappiratu; Ni Ketut Sumarni
KOVALEN: Jurnal Riset Kimia Vol. 4 No. 3 (2018): Edisi Desember
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Telah dilakukan penelitian tentang Aplikasi Likopen Tersalut Maltodekstrin Dari Buah Tomat Apel (Lycopersicum pyriforme) Dalam Pengolahan Bubur Jagung Muda Instan Fungsional. Tujuan penelitian adalah untuk menentukan masa simpan bubur jagung muda instan fungsional yang diberi likopen tersalut maltodekstrin pada berbagai konsentrasi serta untuk mengetahui pengaruh konsentrasi likopen tersalut maltodekstrin terhadap masa simpan bubur instan fungsional. Pencapaian tujuan digunakan likopen tersalut maltodekstrin pada pembuatan bubur jagung instan dengan konsentrasi 250 ppm, 500 ppm, 750 ppm, 100 ppm, dan 1250 ppm. Bubur instan fungsional disimpan pada suhu ruang selama 49 hari dengan selang waktu pengamatan retensi likopen 7 hari. Hasil yang diperoleh menunjukkan masa simpan bubur jagung muda instan fungsional meningkat dengan meningkatnya penggunaan konsentrasi likopen tersalut maltodekstrin. Masa simpan terlama (51,95 hari) ditemukan pada penggunaan likopen tersalut maltodekstrin 1250 ppm. Kata kunci: tomat, likopen, bubur jagung, masa kadaluarsa

ANALISIS KANDUNGAN NUTRISI MIE KERING YANG DISUBTITUSIKAN AMPAS KELAPA Sylvia Florensy Bawias; Syamsuddin; Prismawiryanti; Ni Ketut Sumarni
KOVALEN: Jurnal Riset Kimia Vol. 5 No. 3 (2019): Edisi Desember
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Research has been carried out on the nutritional content of dried noodles substituted with coconut pulp. This study aims to determine the highest total protein content, highest crude fiber content and the highest water content and organoleptic quality of dried noodles substituted with coconut pulp. Dry noodles are made from wheat flour and coconut pulp as the main ingredients. The material ratio is varied to 90:10; 80:20; 70:30 and without the addition of coconut pulp flour. Dry noodles without the addition of coconut pulp flour produced the highest total protein content of 18.57%(b/b) and at the ratio of 70:30 the highest crude fiber was 17.55% (w/w) and the highest water content was 2.63% (w/w). Based on the quality of organoleptic dry noodles the most preferred is at the ratio of 90:10. Keywords: Dry noodles, coconut pulp flour, total protein content, crude fiber content, water content, organoleptic quality

Perbandingan Kadar Albumin Ikan Gabus (Channa striata) dari Proses Perebusan dan Pengukusan dengan Menggunakan Uji Biuret: Comparison of Cork Fish (Channa striata) Albumin Content from Boiling and Steaming Process by Using Biuret Test Sulfitri Suardi; Syaiful Bahri; Khairuddin; Ni Ketut Sumarni; Erwin Abdul Rahim
KOVALEN: Jurnal Riset Kimia Vol. 6 No. 1 (2020): Edisi April
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.i1.12699

Cork Fish (Channa striata) is a freshwater fish that was spread throughout most of Indonesia and it contains albumin that was beneficial to the human body. Albumin was easily dissolved in water during the cooking process both boiled and steamed. This study aims to determine the influence of boiling and steaming times at 100oC against albumin content of cork fish that lost and left in fish meat. The times of boiling and steaming that was used to processing the fish were 10, 15, and 20 minutes. The albumin concentration that lost and left in for the boiling and the steaming process was determined by the biuret test that used a UV-Vis spectrophotometer at albumin maximum wavelength of 530 nm. The results showed that albumin content that lost for 10 minutes boiling process (62 mg/10g) was smaller than the other boiling times and albumin left in fish meat was 164 mg/10g. The same result was also obtained at 10 minutes steaming process which results left in albumin content of 167 mg/10g and lost albumin of 62 mg/10g. The albumin content that lost or dissolved in water for the steaming process was smaller than the boiling process, therefore the steaming process is more efficient than the boiling process at cork fish processing. Keywords: Cork fish, albumin, boiling, steaming.

Retensi Ekstrak Karoten pada Olahan Mie Wortel (Daucus carrota L.): Retention of Carotene Extract on Carrot (Daucus carrota L.) Noodles Putri Wahyuni; Ni Ketut Sumarni; Prismawiryanti; Jaya Hardi
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.i2.12794

Carotene extract from carrots (Daucus carrota L.) can improve the quality of processed noodles. Determining of carotene retention in processed carrot noodles during the storage period that has been done aims to know the reaction kinetics and shelf life of the noodles. Carrot noodles were stored for 8 weeks at room temperature and analyzed its carotene content by using a UV-Vis spectrophotometer every 7 days. The result showed that the retention of carrot noodles during storage of 0, 1, 2, 3, 4, 5, 6, 7, and 8 weeks was 53.64%, 53.19%, 52.49%, 51.68%, 51.07%, 46.30%, 45.96, 45.88, and 44.93%, respectively. The retention kinetics of carrot noodles during storage followed a zero-order reaction and had a shelf life of up to 30 weeks, 4 days, 4 hours. Keywords: carrot noodles, retention, self life

Co-Authors A.A. Ketut Agung Cahyawan W Abd. Rahman Abd. Rahman Razak Abd. Rahman Razak Abd. Rahman Razak Razak Ahmad Ridhay Aini Auliana Amar Amiluddin, Muh. Rafiq Andi Saifah Anita Anita Asri Wulandari Ayu Anggraini Puspitasari Bambang Sardi Darman Panggalo Dewi Irtawati, Dewi Dharmayanti, Gusti Ayu Putu Candra Diharnaini Diharnaini Djumidar Dwi Juli Puspitasari Efin Lestari Eka Dwiyanti Tombilayuk Erwin Abdul Rahim Evi Sulastri firmasari firmasari Fisty Sumangkut Fridian Aprilia, Natasya Gilang Almilda Hardi Ys Hardi Ys. Henny H. Veronika Husain Sosidi I Nyoman Adi Putra I Nyoman Yudha Astana Ida A M D Yadnyani Inda, Nov Irmawati Indriani Indriani Jaya Hardi Jusman, Jusman Khaerunisa Khaerunisa, Khaerunisa Khairuddin Khairuddin Kostriana Daniel Laksono Trisnantoro Lewi Michal Pakiding Lisma Habiba Lutvina Vitasari Mahfud Mahfud Mappiratu Mappiratu Mappiratu Mappiratu Mappiratu Mappiratu Mappiratu Mappiratu Marsela, Anggi Maulana, Asad Minda M Miswan Moh. Mirzan Moh. Rifki Saputra Muala, Bahran Musafira Musafira Musafira Musafira Musafira Musafira Nea, Sirah Diniati Nov Irmawati Inda Nov Irmawati Inda Novitaliani Kea Nur Istiqomah Nurfita Sari Nurhaeni Nurhaeni Nurhaeni Nurhaeni Nurhaeni Nurhaeni Nurhalisa, Sitti Nurlina Ibrahim Nurviani Nurviani Pasjan Satrimafitrah Prismawiryanti Prismawiryanti Putri Wahyuni Rahma Wati Rahmawati Rahmawati Riski, Mutiara Zalfa Ruslan Ruslan Ruslan Sarapun, Veky Serli Jayanti Setyaningrum, Annisa Shiomori, Koichiro Sopyan Sopyan Sulfitri Suardi Sumarni Syaiful Bahri Syaiful Bahri Syaiful Bahri Syamsuddin Syamsuddin Syamsuddin Sylvia Florensy Bawias Ulayya Kasio Umma Fahriah Soleh Vitasari Vitasari Windi Windi Yana Silvia Mauru Yesy Febriyanti Yovita Yovita

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