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All Journal JSI: Jurnal Sistem Informasi (E-Journal) PROSIDING SEMINAR KIMIA Jurnal Tadris Kimiya JURNAL ATOMIK JKPK (Jurnal Kimia dan Pendidikan Kimia) Bivalen: Chemical Studies Journal Jurnal Sains dan Kesehatan Jurnal Ilmiah Manuntung: Sains Farmasi dan Kesehatan Jurnal Pendidikan Kimia, Fisika dan Biologi
Sukemi Sukemi
Chemical Education Program, Faculty Of Teacher Training And Education, Mulawarman University, Samarinda, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Education Energy Environmental Science Immunology & microbiology Library & Information Science Medicine & Pharmacology Nursing Public Health Other

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MINERALS, NUTRIENTS AND ACTIVE COMPOUNDS OF RAMBUTAN FRUITS Sukemi -
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2014
Publisher : PROSIDING SEMINAR KIMIA

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Abstract

The main object ive of this essay was to describe the minerals, nutrients and active compounds of rambutan (Nephelium lappaceum L.) fru its. Flesh fruit of rambutan is a source of minerals and ascorbic acid that are needed by human body. Its seed oil provides mineral and fatty acid. Its peel contains ellagic acid, corilagin and geraniin that have biological activit ies, such as antioxidant, anticancer, anti-inflammation, anti-hyperalgesic antiviral, anti-semicarbazide-sensitive amine o xidase (SSAO), and anti-hypertensive. Rambutan is not only consumed as fresh fruits, but also it can be used as sources of food and medicine products.
Minerals, Nutrients and Active Compounds of Rambutan Fruits Sukemi -
PROSIDING SEMINAR KIMIA PROCEEDING OF INTERNATIONAL CONFERENCE 2015
Publisher : PROSIDING SEMINAR KIMIA

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Abstract

The main objective of this essay was to describe the minerals, nutrients and active compounds of rambutan (Nepheliumlappaceum L.) fruits. Flesh fruit of rambutanis a sourceof minerals and ascorbic acid that are needed by human. Its seed oil provides mineral and fatty acid. Its peel contains ellagic acid, corilagin and geraniin that have biological activities, such as antioxidant, anticancer, anti-inflammation, anti-hyperalgesic antiviral, anti-semicarbazide-sensitive amine oxidase (SSAO), and anti-hypertensive. Rambutan is not only consumed as fresh fruits, but also it can be used as sources of food and medicine products.
PENGARUH WAKTU KONTAK TERHADAP PENJERAPAN EKSTRAK ETANOL PUCUK DAUN PUCUK MERAH (Syzygium oleana) OLEH KERTAS SARING Sukemi Sukemi
PROSIDING SEMINAR KIMIA 2020: Prosiding Seminar Nasional Kimia Berwawasan Lingkungan (SNK-BL) 2020
Publisher : PROSIDING SEMINAR KIMIA

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This study aimed to determine the effect of contact time on % adsorption of ethanol extract of Pucuk Merah (Syzigium oleana) Shoot-Leaves (PMSL) by filter paper. The ethanol extract of PMSL was obtained by using maceration technique for 24 hours with material liquor ratio (MLR) of 1:7 (g/ml). The adsorption of ethanol extract of PMSL onto filter paper was done at different contact times, i.e. 30, 60, 90, and 120 minutes with MLR of 1:100 (g/ml), filter paper weight of 0.2850 ± 0.0092 g, solution volume of 30 ml and temperature of 81oC. The results showed that contact time effect on adsorption of ethanol extract of PMSL onto filter paper. The % adsorption of ethanol extract of PMSL onto filter paper increased with an increase in the contact time. The optimum contact time on the adsorption of ethanol extract of PMSL by filter paper was 90 minutes. Keyword : Pucuk merah shoot-leaves, Syzigium oleana, contact time, adsorption.
PENGARUH SUHU TERHADAP PENJERAPAN EKSTRAK ETANOL PDPM (PUCUK DAUN PUCUK MERAH) OLEH KERTAS SARING Sela Defi Alib Pradani; Sukemi Sukemi; Harra Ismi Farah; Ade Irfan
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2017
Publisher : PROSIDING SEMINAR KIMIA

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Abstract

The use of natural extracts from plants mobilized onto solid media as acid-base and pH indicators is being attention of researchers. The mobilization of the ethanol extract of Syzigium oleana shoot leaves has been done and produces paper indicator that can be changed its colorin different pH. This study was designed to determine the effect of temperature on the adsorption of the ethanol extract of S. oleana shoot leavesonto filter paper. The ethanol extract of S. oleana shoot leaves was obtained by using maceration technique for 24 hours with material liquor ratio (MLR) of 1: 7. The adsorption ofethanol extract of S. oleana shoot leaves onto filter paper was carried out at different temperature, i.e. 27°C, 52°C and 81°C with MLR of 1: 100, filter paper weight of 0.2949 ± 0.0035 gram and solution volumeof 30 mL for 2 hours. The results showed that temperature effect on the adsorption of ethanol extract of S. oleana shoot leaves onto filter paper. The % adsorption of S. oleana shoot leaves onto filter paper increased with an increase in the temperature. Keywords : pucuk daun pucuk merah, Syzigium oleana, temperature, adsorption
NUTRISI TEPUNG KULIT DAN JERAMI NANGKA Radoh Rinasih Hermawani; Desti Ramadhani; Aris Madiun Daya; Firman Wahyudi; Sukemi Sukemi
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2019
Publisher : PROSIDING SEMINAR KIMIA

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Abstract

Kulit nangka mengandung karbohidrat sebesar 15,87%, selulosa sebesar 38,69 % dan protein 1,30%. Jerami nangka mengandung protein sebesar 1,30%, lemak sebesar 0,60% dan karbohidrat sebesar 15,87%. Penelitian ini bertujuan untuk mengetahui kadar air, serat, protein, lemak, pati dan abu tepung kulit dan jerami nangka. Uji nutrisi menggunakan uji proksimat. Hasil uji menunjukan bahwa tepung kulit dan jerami nangka mengandung kadar air sebesar 8,167±2,201%, serat sebesar 37,650±1,202%, protein sebesar 7,850±0,778%, kadar abu sebesar 7,355±0,163%, kadar lemak sebesar 7,933±0,004%, dan kadar pati sebesar 16,480±0,00%. Kata kunci: proksimat, protein, lemak, air, abu, dan pati.
Aktivitas antioksidan buah doyo Irsalinda Wessa Nurrahim; Muhammad Ismail Marzuki; Sukemi Sukemi
Bivalen: Chemical Studies Journal Vol 3 No 1 (2020)
Publisher : Bachelor Degree Program of Chemical Education - Mulawarman University | Program Studi S-1 Pendidikan Kimia - Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/bcsj.v3i1.331

Abstract

Tujuan penelitian ini adalah untuk mengetahui aktivitas antioksidan buah doyo (Curculigo latifolia sp.) dan kandungan senyawa metabolit sekundernya. Sampel dalam penelitian ini adalah buah, daging buah dan kulit buah doyo. Kurang lebih 2,5 g sampel diblender dalam 100 ml aquades selama 1 menit dan disaring. Hasil saringan dimasukkan ke dalam labu takar 200 ml dan diencerkan hingga tanda batas. Uji aktivitas antioksidan menggunakan metode DPPH (1,1-Diphenyl-2-picryl Hidrazil) dan uji senyawa metabolit sekunder menggunakan uji warna. Hasil penelitian menunjukkan aktivitas antioksidan buah, daging buah dan kulit buah doyo secara berturut-turut adalah 85,91±0,99%; 87,89±1,97%; dan 85,32±2,13%. Ekstrak aquades buah doyo mengandung alkaloid dan terpenoid. Penelitian ini menunjukkan bahwa buah doyo berfungsi sebagai antioksidan
Senyawa fenolik dan flavonoid, dan aktivitas antioksidan ekstrak metanol kulit buah ihau (Dimocarpus longan Lour. var. malesianus Leenh.) Nor Hikmah; Enos Tangke Arung; Sukemi Sukemi
Bivalen: Chemical Studies Journal Vol 3 No 2 (2020)
Publisher : Bachelor Degree Program of Chemical Education - Mulawarman University | Program Studi S-1 Pendidikan Kimia - Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/bcsj.v3i2.447

Abstract

Senyawa fenolik dan flavanoid adalah senyawa kimia yang bertindak sebagai penangkal radikal bebas. Senyawa tersebut banyak terkandung dalam tanaman dan buah-buahan. Penelitian ini dirancang untuk menentukan total senyawa fenolik dan flavanoid, dan aktivitas antioksidan ekstrak metanol kulit buah ihau (Dimocarpus longan Lour. var. malesianus Leenh.). Serbuk kering kulit buah ihau dimaserasi dalam metanol selama 48 jam dan difiltrasi. Filtrat dipekatkan menggunakan evaporator. Total senyawa fenolik ditentukan menggunakan metode Follin Ciocalteau dan total flavanoid ditentukan menggunakan tes dengan AlCl3. Aktivitas atioksidan diukur menggunakan uji penangkapan radikal DPPH. Total senyawa fenolik adalah 383,720±0,986 mg/g ekstrak dan total senyawa flavanoid adalah 26,000±0,001 mg/g eksrak. Ekstrak menunjukkan aktivitas penangkapan radikal DPPH dengan pesentase penangkapan 85.6% pada konsentrasi 200 ppm. Hasil ini menunjukkan bahwa kulit buah ihau memeiliki potensi sebagai sumber agen penangkap radikal bebas.
Pengaruh konsentrasi terhadap penjerapan ekstrak etanol pucuk daun pucuk merah (Syzygium oleana) oleh kertas saring Ajeng Hayu Pratiwi; Iis Intan Widiyowati; Sela Defi Alib Pradani; Sukemi Sukemi
Bivalen: Chemical Studies Journal Vol 4 No 1 (2021)
Publisher : Bachelor Degree Program of Chemical Education - Mulawarman University | Program Studi S-1 Pendidikan Kimia - Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/bcsj.v4i1.719

Abstract

Penggunaan kertas indikator asam basa khususnya pada daerah terpencil sangatlah terbatas, maka diperlukan suatu alternatif kertas indikator asam basa dengan memanfaatkan tanaman lokal. Mobilisasi ekstrak etanol pucuk daun pucuk merah (Syzygium oleana) telah dilakukan dan menghasilkan kertas indikator yang dapat berubah warna pada pH yang berbeda. Penelitian ini dirancang untuk mengetahui pengaruh konsentrasi terhadap penjerapan ekstrak etanol pucuk daun pucuk merah (PDPM) oleh kertas saring. Ekstrak etanol PDPM diperoleh dengan menggunakan metode maserasi selama 24 jam dengan perbandingan ekstraksi antara sampel dan pelarut 1 : 7. Proses penjerapan kertas saring dilakukan pada konsentrasi yang berbeda selama 2 jam dengan material liquor ratio (MLR) 1: 100 pada suhu 81℃, berat kertas saring 0,2884 ± 0,0035 gram dan volume larutan 30 mL. Hasil penelitian menunjukkan bahwa konsentrasi berpengaruh terhadap penjerapan ekstrak etanol PDPM pleh kertas saring. % adsorpsi ekstrak oleh kertas saring semakin menurun dengan meningkatnya konsentrasi ekstrak.
Acid Base Indicator from Shoot-Leaves Ethanol Extract of Pucuk Merah (Syzygium oleana) Sukemi Sukemi; Usman Usman; Boyfanie Ivan Putra; Widya Purwati; Nindy Nur Rahmawati; Sela Defi Alib Pradani
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 2, No 3 (2017): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (790.946 KB) | DOI: 10.20961/jkpk.v2i3.11864

Abstract

Experiment on natural acid-base indicators is usually done by extracting the natural sources with certain solvent, testing the extract with acid, base and neutral solutions, observing the color changes, making conclusion and discharging the remaining extract at the end of the experiment. Production of long-lasting natural acid-base indicator is needed to reduce the discharged of chemicals excessively. This research was carried out to produce natural acid-base indicator from extract of shoot leaves of Syzygium oleana (SLS). The extraction was done by maceration technique using ethanol 95% for 13 h. The extract of SLS (SLS indicator solution) is then used to produce SLS indicator paper by soaking the filter paper in SLS indicator solution and followed by drying under shade. Both of the solution and paper indicators were tested for their color changes in pH solutions range of 1-13. Durability and performance of the indicator was investigated for 6 d. Absorbance of the indicator solution was measured under wavelength of 200-700 nm by using UV-Vis spectrophotometer. The results showed that, both of the indicators can be used as acid-base indicator; even it can be used to determine the pH range of solution. The color changes of SLS indicator in solution pH of 1-13 were pink-fade green-moss green-brown. Both of the indicators showed a good performance in their color change for 6 d of storage. Thus, the ethanol extract of SLS can be used as raw material to produce acid-base indicator.
Peningkatan Akurasi Prediksi Cnn-Lstm Dan Cnn-Gru Untuk Mendiagnosa Skizofrenia Melalui Sinyal Eeg Gabriel Ekoputra Hartono Cahyadi; Sukemi Sukemi; Dian Palupi Rini
Jurnal Sistem Informasi Vol 14, No 2 (2022)
Publisher : Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jsi.v14i2.19071

Abstract

AbstrakSkizofrenia adalah gangguan jiwa yang umumnya muncul dalam bentuk halusinasi pendengaran, paranoia, atau cara berbicara dan berpikir yang kacau. Diagnosa penderita Skizofrenia dapat dilakukan dengan menggunakan pemeriksaan sinyal EEG. Penelitian ini melakukan analisa perbandingan metode yang terbaik untuk melakukan klasifikasi EEG menggunakan metode Deep Learning (DL). Penulis menggunakan metode 1D Convolutional Neural Network (1D CNN) yang menggunakan layer berbeda. 1D-CNN pertama menggunakan layer Long short-term memory (LSTM) dan 1D-CNN kedua menggunakan layer Gated Recurrent Unit (GRU). Dataset yang digunakan adalah 28 jenis sinyal EEG yang terdiri dari 14 penderita Skizofrenia dan 14 subjek normal. Hasil pengujian akurasi F1 Score dari CNN yang menggunakan layer LSTM memiliki nilai sebesar 95% dan CNN yang menggunakan layer GRU memiliki nilai 96%. Pengujian kedua metode tersebut menunjukkan bahwa nilai dari CNN-GRU lebih besar dari CNN-LSTM.   
Co-Authors -, Aldiansyag Ade Irfan Ainun Rezkiva Arif Ajeng Hayu Pratiwi Aris Madiun Daya Binti Khairunnisa Boyfanie Ivan Putra Desti Ramadhani Dian Palupi Rini Enih Rosamah Enos Tangke Arung, Enos Tangke Erwin Erwin Farah Erika Firdaus Firdaus Firman Wahyudi Gabriel Ekoputra Hartono Cahyadi Gunawan, Rony Hanggara Arifian Harlinda Kuspradini Harra Ismi Farah Herman Herman Iis Intan Widiyowati Indriana Tasya Irawan Wijaya Kusuma, Irawan Wijaya Irsalinda Wessa Nurrahim Laode Rijai Markus, Rio Mardani Mitha Saputri MUHAMMAD AMIR MASRUHIM Muhammad Ismail Marzuki Muhammad Naufal Rachmatullah Nataniel Tandirogang Nindy Nur Rahmawati Nor Hikmah Nurdianah Abdul Kadir Pasa, Jessica Indriyani Pintaka Kusumaningtyas Prastika, Nanda Diah Radoh Rinasih Hermawani Rahmadani, Agung Ricy Firnando Sefi Dwi Wahyuni Sela Defi Alib Pradani Sela Defi Alib Pradani Sela Defi Alib Pradani Septiani, Risky Siti Nurmaini Sri Lestari Supriatno Salam Usman Usman Usman Usman Usman Usman Wahyu Yunita Lestari Widya Purwati