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INDONESIA
PROSIDING SEMINAR KIMIA
Published by Universitas Mulawarman
ISSN : -     EISSN : -     DOI : -
Core Subject : Science,
Chemistry
Arjuna Subject : -
Articles 479 Documents
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ANALISIS KETRAMPILAN PROSES SAINS SISWA KELAS XI IPA SMA ISLAM SAMARINDA PADA POKOK BAHASAN HIDROLISIS MELALUI METODE EKSPERIMEN Maradonna -
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2013
Publisher : PROSIDING SEMINAR KIMIA

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Abstract

Keterampilan proses sains merupakan kemampuan siswa dalam melakukan metode ilmiah dalam memahami, mengembangkan sains serta menemukan ilmu pengetahuan. Penggunaan metode eksperimen dapat membantu siswa, karena tidak hanya menitik beratkan pada pemahaman konsep tetapi juga mengembangkan keterampilan proses sains. Penelitian dengan judul Analisis Keterampilan Proses Sains Siswa SMA Islam Samarinda Kelas XI Dalam Pokok Bahasan Hidrolisis Melalui Metode Eksperimen. Penelitian ini bertujuan untuk mengetahui bagaimana Keterampilan Proses Sains Siswa Kelas XI IPA SMA Islam Samarinda pada Pokok Bahasan Hidrolisis melalui metode eksperimen. Sampel penelitian ini adalah siswa SMA Islam kelas XI IPA. Pengumpulan data dilakukan= menggunakanlembar kerja siswa. Menghitung skor dari jawaban lembar kerja Siswa dan mengubah skor dalam bentuk persentase sehingga dapat terlihat keterampilan proses sains siswa. Berdasarkan hasil penelitian, analisis data dan pembahasan, dapat diketahui bahwa keterampilan observasi siswa termasuk kategori cukup dengan persentase 60,01% dan keterampilan mengklasifikasikan siswa termasuk kategori baik dengan persentase 70,76%.
FORMULASI GEL HAND SANITIZER DARI KITOSAN DENGAN BASIS NATRIUM KARBOKSIMETIL SELULOSA Supomo -; Yullia Sukawati; Fedri Baysar
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2014
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Kitosan telah banyak dimanfaatkan dalam bidang industri, pangan, farmasi dan pertanian. Sifat biologi kitosan antara lain bersifat bio ko mpatibel artinya sebagai polimer alami sifatnya tidak mempunyai akibat samping, tidak beracun, tidak dapat dicerna dan mudah diuraikan oleh mikroba (biodegradable). Penelit ian ini bertujuan untuk mengetahui apakah kitosan dapat diformulasikan ke dalam sediaan gel hand sanitizer yang memenuhi persyaratan stabilitas fisik gel. Kitosan diformu lasikan dengan memvariasikan 3 konsentrasi basis Na CMC yaitu 3%, 4,5% dan 6%. Pengujian sediaan gel yang dilaku kan adalah uji stabilitas fisik yang meliputi uji organoleptis, uji homogenitas, uji pH, uji daya sebar, uji viskositas dan uji konsistensi. Pengujian dilakukan setiap minggu selama 4 minggu penyimpanan. Hasil pengujian sifat fisik gel hand sanitizer dari kitosan mempunyai bentuk dan warna yang stabil namun aroma yang dihasilkan berubah selama penyimpanan. pH sediaan gel memenuhi persyaratan, pada pengujian konsistensi tidak terjadi pemisahan fase, pada pengujian homogenitas menunjukkan gel tidak homogen,daya sebar gel tidak memenuhi persyaratan,viskositas sediaan gel dari ketiga formula tidak memenuhi persyaratan viskositas gel. Dari hasil penelitian dapat disimpulkan bahwa sediaan gel memenuhi persyaratan organoleptis, pH, dan konsistensi, namun tidak memenuhi pers yaratan homogenitas, daya sebar dan viskositas gel.Data yang telah diperoleh kemudian dikumpulkan, dianalisis dan diinterpretasikan secara deskriptif menggunakan tabel dan grafik.
UJI AKTIVITAS ANTIOKSIDAN EKSTRAK METANOL TUMBUHAN SINGGAH PEREMPUAN (Loranthus sp) DENGAN METODE DPPH (2,2- Difenil-1-Pikrilhidrazil) Sapri -; Reni Pebrianti; Mohamad Faizal
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2013
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Abstract

Di daerah Kalimantan Timur masyarakat banyak mengenal benalu sebagai obat kanker, Masyarakat Kutai mengenal beberapa jenis tumbuhan benalu diantaranya adalah Tumbuhan Singgah perempuan (Loranthus sp). Berdasarkan latarbelakang dilakukan penelitian uji aktivitas antioksidan ekstrak metanol tumbuhan singgah perempuan dengan metode DPPH. Penelitian ini bertujuan untukmengetahui aktivitas antioksidan tumbuhan singgah perempuan. Hasil dari pembuatan ekstrak dengan metode maserasi didapatkan hasil ekstrak kental sebesar 9,61 g dengan rendemen ekstrak tumbuhan singgah perempuan dengan pelarut metanol sebesar 3,84 %. Hasil dari skrining fitokimiamenunjukkan adanya senyawa alkaloid, flavonoid, tannin, terpenoid dan saponin. Pada penelitian uji aktivitas antioksidan tumbuhan singgah perempuan (Loranthus sp) dengan metode DPPH ini dapatkan hasil bahwa pada tumbuhan singgah perempuan memiliki aktivitas senyawa antioksidan kuat dengan nilai IC 50 sebesar 46,19 ppm.
Jadwal Seminar Nasional Kimia Program Studi Kimia
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2013
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Abstract

Berikut merupakan jadwal sesi oral dan poster acara Seminar Nasional Kimia 2013
KARAKTERISASI DAN SKRINING FITOKIMIA AKAR TABAR KEDAYAN (Aristolochiafoveolata Merr.) Siti Jubidah; Sapri -; Risa Supriningrum
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2013
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Abstract

East Kalimantan has so much plant diversity of the various ethnic Dayak. One is the Tabar Kedayan plants (Aristolochia foveolata), which empirically efficacious as an antidote (anti-venom). However, its usefulness has not been scientifically confirmed, this is due to the small number of scientific studies on the content of secondary metabolites and bioactive compounds contained in the plant Aristolochia foveolata. Characteristics of simplicianot found in Aristolochia foveolata plant monograph book Materia Medika Indonesia (MMI).This study aimed to investigate the characteristics of botanicals and content ofsecondary metabolites of Aristolochia plants foveolata. This study covers the characteristics of simplicia (byorganoleptic, macroscopic and microscopic) and phytochemical screening (inspection/identification of secondary metabolites) from the plant Aristolochia foveolata. Determination results showed that the samples of plants used are Tabar Kedayan Root(Aristolochia foveolata Merr.). Of the genus Aristolochia and family Aristolochiaceae. Tabar Kedayan root powder contained fragments: fibers, cork fragments, starch items, wooden vessels, parenchyma.Characteristic root extract is obtained Tabar Kedayan; condensed form of oily, brown color, typical aromatic odor, bitter taste, pH 5, specific gravity 1.047 g / ml, 31% shrinkage drying, water-soluble compound 42.5%, compound soluble in ethanol 16.13%, yield 25% extract. Tabar Kedayan root contains compounds alkaloids, flavonoids, saponins, tannins, terpenoids and steroids. TLC method using a spray reagent Dragendorf, showed that positive Tabar Kedayan roots contain the alkaloid compound gives red brick staining with Rf value of 0.96.
SINTESIS MEMBRAN POLIMER ELEKTROLIT DARI BAHAN POLI(VINIL ALKOHOL) DENGAN LITIUM HIDROKSIDA(LiOH) SEBAGAI SUMBER ELEKTROLITNYA Rahmawati M
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2014
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Abstract

Electrolyte polymer membranes were synthesized by solution cast method. Fabrication of polymer electrolyte memb ranes done by using the polymer poly (vinyl alcohol)(PVA) and Lithiu m Hydro xide (LiOH) as the source of the electrolyte. PVA dissolved in distilled water while heated at 50 0 C for 2 hours. For preparing LiOH solution, the same procedure as for PVA solution were heated for an hour. Futhermore, PVA solution and LiOH solution were mixed wh ile stirred and heated at 50 0 C for one hour.Then, the mixture solution was evaporated for 2 days which ultimately resulted in a thin sheet-transparent membrane. The perfo rmance of poly mer electro lyte membrane PVA -LiOH characterized by physical properties and conductivity analysis using Electrochemical Impedance Spectroscopy (EIS). The maximum measurement results and conductivity values obtained in 9% concentration of LiOH, reach 2.48 x10 -4 S.cm -1 .
IDENTIFIKASI KANDUNGAN BAHAN KIMIA OBAT PARASETAMOL PADA JAMU ASAM URAT YANG BEREDAR DI KECAMATAN SUNGAI KUNJANG SAMARINDA Henny Nurhasnawati; Rahmayulis -; Dery Ahlul Azmi
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2014
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This research about identifying medicine chemicals content of parasetamol on uric acid herb which found at Kecamatan Sungai Kunjang have been done. This research methods start with intake of sample, sample preparation and identify parasetamol through colour reaction and thin layer chromatography. Colour reaction use azo reagen, FeCl 3 10% and K 2 Cr 2 O 7 . While eluen for KLT use sikloheksana : chloroform : methanol : glacial acetic acid (60 : 30 : 5 : 5) and chloroform : methanol ( 90 : 10) Result of research show there are one sample which positive contain parasetamol that is B sample with value of Rf = 0,03 in first eluen and 0,24 in second eluen. While two sample A a nd C are not indicated containing parasetamol.
INOVASI PROGRAM PEMBELAJARAN KETERAMPILAN BERPIKIR KRITIS MELALUI MODEL PEMBELAJARAN KONSTEKSTUAL PADA POKOK BAHASAN LARUTAN PENYANGGA Widiyowati, Iis Intan
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2014
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A study has been conducted which is aimed to find out about critical thinking skill of Senior High School Students in Buffer Solution learning with Contextual Teaching and Learning. This study used One Group Pre-test-Post-test Design which involved 42 Senior High School students of class XI. The data that was obtained from the pre-test and post-test mark to find out about critical thinking skill. The excellence of the program was could show relationship among concept, develop concept understanding and critical thinking skills of student with Contextual Teaching and Learning. Generally, the learning model with Contextual Teaching and Learning can motivate students to learn, and it can improve the complex thinking ability
PRODUCTION OF CELLULASE AND REDUCING SUGAR FROM OIL PALM EMPTY FRUIT BUNCH BY Streptomyces hirsutus ISOLATE 12.3.A Nurkaya, Hamka
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2013
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This research aimed to utilize the oil palm empty fruit bunch for the production of reducing sugar. The oil palm empty fruit bunch (OPEFB) is the palm oil industry waste which composed of lignocellulosic material. Utilization microbial as an organism which can degrade a lignocellulosic biomass into simple sugars is a way to reduce the environmental problem. A potential of using OPEFB to accelerate cellulase activity and reducing sugar production by cellulolytic microorganism was tested. The high cellulase activity and reducing sugar producing actinomycetes isolate 12.3.A that was isolated from the oil palm plantation area in Phetchaburi, Thailand was used in this study. The isolate 12.3.A was preliminary appointed to be Streptomyces hirsutus from the result of 16S-rRNA gene analysis. The optimal conditions for cellulase activity and reducing sugar production of S. hirsutus isolate 12.3.A were determined. The best yields were derived from culturing the cells at pH 7, 30°C, substrate concentration of 1% and ammonium sulfate as nitrogen sources for 6 days incubation. The highest cellulase activities and reducing sugar production from OPEFB as substrate were 0.71 U/ml and 3.82 mg/ml, respectively.
PEMISAHAN KAROTENOID DARI CRUDE PALM OIL- MONOASILGLISEROL (CPO-MAG) MENGGUNAKAN KOLOM FASE TERBALIK DIAION HP-20 Nurholis Majid
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2014
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Pemisahan karotenoid dari CPO dapat dilaku kan menggunakan beberapa metode antara lain saponifikasi, adsorpsi, presipitasi, selective solvent extraction serta transesterifikasi yang diikuti dengan destilasi mo leku lar. Penelit ian in i memisahkan karotenoid dari CPO yang termodifikasi secara glycerolisis sehingga kaya akan Monoasilgliserol (CPO-MA G). Produk termodifikasi ini memiliki sifat lebih polar dari CPO sehingga pemisahan dapat dilakukan dengan kolo m fase terbalik Diaion HP-20. Konsentrasi karotenoid yang diperoleh dari pemisahan ini mencapai 5000 ppm, sementara konsentrasi karotenoid awal pada CPO adalah 600 pp m.

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