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INDONESIA
PROSIDING SEMINAR KIMIA
Published by Universitas Mulawarman
ISSN : -     EISSN : -     DOI : -
Core Subject : Science,
Chemistry
Arjuna Subject : -
Articles 42 Documents
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Search results for , issue "SEMINAR NASIONAL KIMIA 2014" : 42 Documents clear
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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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
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.
KUALITAS MINYAK ATSIRI NILAM DARI METODE PENGECILAN UKURAN PADA PENYULINGAN TANAMAN NILAM (Pogostemom cablin BENTH). Supriono -; Theresia Adi Susanti
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2014
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Penelitian ini berjudul “Kualitas Minyak Atsiri Nilam dari Metode Pengecilan Ukuran pada Penyulingan Tanaman Nilam (Pogostemom cablin BENTH)” bertujuan untuk mengetahui kualitas dari minyak atsiri nilam yang dincang dan yang tanpa dicincang. Apakah sesuai dengan standar mutu SNI atau tidak. Penelit ian ini dilaksanakan di Sanga-Sanga, dan Lab. Analitik Kimia Po liteknik Pertanian Negeri Samarinda, sedangkan waktu pengolahan minyak nilam dan lada juga analisa mutunya selama 2 bulan kalender. Metode penyulingan yang digunakan adalah metode air dan uap. Dari hasil analisa diperoleh mutu minyak atsiri nilam yang tanpa dicincang dengan warna cokelat kemerahan, indek b ias 1,502, berat jenis 0,85. Kelarutan alkohol 1:3 . bilangan as am 3,95, bilangan ester 10. Sedangkan minyak atsiri nilam yang dicincang dengan warna kuning, indek bias 1,505, berat jenis 0,505, kelarutan alkohol 1:6, bilangan asam 3,25 bilangan ester 8,25. Melalui penelit ian terhadap mutu minyak atsiri nilam dapat disimpulkan beberapa hal penting yaitu: s ecara umum mutu minyak atsiri yang dihasilkan termasuk baik, karena masih masuk dalam SNI baik minyak Nilam dari tanpa dicincang maupun Dicincang . Pada minyak nilam yang berasal dari Dicincang lebih baik mutuya dibanding tanpa dicincang.
PERUBAHAN KOMPOSISI PATI PADA TEPUNG PISANG KAPAS (Musa comiculata) TERMODIFIKASI SECARA FERMENTASI SPONTAN DAN LAMA PEMANASAN BERTEKANAN-PENDINGINAN Miftakhur Rohmah
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2014
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Kapas banana is a source of carbohydrate that can used as flour. Physical and chemical properties of the natural flour have abstacle that caused limited apllication for food product. Banana flour can be modified by spontaneous fermentation and autoclaving -cooling to increase the function of the flour. Thisstudy aims to determine strach, amylose and amy lopectin content. This experiment used completely randomized design with two factorial and three replication. The first factor was spontaneous fermentation in 0, 12, 24, and 45 hour, whereas the other was autoclaving - cooling in 0 , 15 , 30 and 45 minute. Result of the experiment showed that modification of spontaneous fermentation and autoclaving the affect the characteristic of kapas banana flour . The content of starch, amylose, and amylopectin in the kapas banana flour are 58.56-71.70 %, 14.58-20.46 %, and 39.66-54.03 % respectively.
UJI BSLT DAN ANTI OKSIDAN EKSTRAK N-BUTANOL DAN AIR PADA RANTING TANAMAN SIRIH HUTAN (Piper aduncum .L.) Syelvia Lousiana Ningsih Kalauw; Yerwanto Ilang; Rudi Kartika; Fauzi Rachman; Partomouan Simanjuntak
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2014
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Forest betel plant is a plant belonging to the Piperaceae tribe. Sap of plants are often used by people as a cure boils and leaves as toxicity to mosquito larvae o f Aedes aegypti L. Was tested for BSLT (Brine shrimp Lethality Test) and antioxidants in ethanol and water ext ract of the twigs of the plant betel leaves this forest, the concentration used in the test BSLT 10 , 100 and 1000 pp m and antio xidant tests with obstacle (inhibit ion)% 5, 10, 25, 50 and 100pp m. Principles used in to xicity tests of ethanol and water extracts of p lant twigs forest betel Piper aduncum .L ( family :p iperaceae) BSLT (Brine shrimp Lethality Test) determined by the method of total mortality of larvae shrimp Artemia salina Leach extract co mpounds due to the influence of natural materials with a part icular concentration and antioxidant principle is based on the color of the solution changes DPPH (1,1-di fenil-2-pikrilhidrasil) from purple to yellow due to the presence of antio xidant compounds. Where the results of research in BSLT test showed that the LC 50 value twigs of 33.88 pp m ethanol extract and water extract of 323.593 ppm. The antio xidant test IC 50 values obtained at 140.732 pp m ethanol extract and water ext ract of 438.687 pp m with a b lank absorbance by 0.813.
PERAN RISET KIMIA PADA PENGEMBANGAN BAHAN BAKAR NABATI (BBN) DI INDONESIA BERBASIS NON EDIBLE BIOMASS Karna Wijaya
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2014
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Saat ini minyak bumi merupakan sumber energi utama yang dipakai di banyak negara. Cadangan minyak bumi terus berkurang dan harganya juga ikut meningkat dari waktu ke waktu. Mengganti BBM dengan sumber energi alternatif terbarukan. Biofuel atau Bahan Bakar Nabati (BBN) merupakan sumber energi yang paling menjanjikan sebagai substitusi BBM fosil. Biofuel adalah bahan bakar yang berasal dari hasil pengolahan biomassa oleh karena itu biofuel sering disebut pula energi hijau karena asal-usul dan emisinya yang bersifat ramah lingkungan dan tidak menyebabkan peningkatan pemanasan global secara signifikan
PENGARUH pH ELEKTROPOLIMERISASI PIROL TERHADAP KONDUKTIVITAS POLIPIROL Yunita Triana; Tri Paus Hasiholan Hutapea; Fredy Kurniawan
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2014
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Telah dilakukan pengukuran konduktivitas elektropolimerisasi polipirol pada berbagai variasi pH. Elektropolimerisasi pirol pada permukaan elektroda emas menggunakan teknik voltammetri siklis dengan sistem tiga elektroda yaitu elektroda emas termodifikasi p iro l, Ag/AgCl (KCl 3M) sebagai elektroda pembanding, dan kawat plat inu m sebagai elektroda bantu. Diu kur pada potensial -0,6 V sampai +1,8V dengan laju scan 100 mV/detik pada kondisi rentang pH 1 sampai 14 menggunakan elektrolit KCl 0,1 M kemudiandilakukan pengukuran impedance untuk mempero leh nilai konduktivitas. Diperoleh data pada kondisi pH 9 elektropolimerisasi pirol memiliki konduktivitas paling tinggi. Dalam keadaan konduktivitas yang tinggi, fungsi pirol sebagai polimer konduktif pada biosensor memiliki kemampuan transfer elektron yang baik.
SKRINING FITOKIMIA DAN BIOAKTIVITAS EKSTRAK DAN ISOLAT DARI DAUN TERAP (Artocarpus odoratissimus Blanco) Erwin -
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2014
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steroid (isolate 1) and flavonoid (isolate 2) types have been isolated from n-hexane and chloroform fractions of Terap (Artocarpus odoratissimus Blanco) leaves, respectively. The types of compounds were determined by phytochemical test. Basic on the result of toxicity test against Brine shrimp lethality test (BSLT) shown that isolate 1 exhib ited highest toxic act ivity among others with LC 50 48.39 ppm.

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