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INDONESIA
PROSIDING SEMINAR KIMIA
Published by Universitas Mulawarman
ISSN : -     EISSN : -     DOI : -
Core Subject : Science,
Chemistry
Arjuna Subject : -
Articles 40 Documents
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Search results for , issue "SEMINAR NASIONAL KIMIA 2013" : 40 Documents clear
STUDI PERUBAHAN KARET ALAM (SIR-10) MENJADI KARET ALAM CAIR DAN KARET ALAM SIKLIS (CYCLIC NATURAL RUBBER) Eddyanto -; Yuslina Wati Ardina
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2013
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The main aims of this work is to produce a lower molecular weight of cyclisised natural rubber (CNR) from chemically chain scission of natural rubber (SIR-10). By chemical modification of natural rubber, it is possible to modify its basic properties (for instance, improvement of solubility as a candidate to be a natural resin in an emulsion paint). The purpose of the present paper is to give an preliminary research to analyze the change of functional group by means of Fourier Transform Infrared (FTIR), especially dealing with natural rubber degradation and cyclisation products derived from the rubber (SIR-10) 1,4-polyisoprene. It was found that the cyclisation degree of cyclic natural rubber was 73%.
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
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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%.
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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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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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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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.
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.
PENGARUH PENAMBAHAHAN PARTIKEL MAGNETIK Fe 3 O 4 TERHADAP PENINGKATAN KONDUKTIVITAS MEMBRAN POLIMER ELEKTROLIT (PVA – LiOH) Rahmawati M
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2013
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Electrical conductivity of electrolyte polymer PVA.LiOH with nanoparticle Fe 3 O 4 dispersion result show a significant increase when compared to electrolyte polymer without nanoparticle Fe 3 O 4 . The electrolyte polymer PVA.LiOH electrical conductivity with nanoparticle Fe 3 O 4 reach 1,18 x 10 -3 Scm -1 orde, while without nanoparticle Fe 3 O 4 the electrical conductivity reach 2,48 x 10 -4 Scm -1 orde. This indicates an increase of amorphous phase after magnetic particle Fe 3 O 4 addition. The existence of magnetic nanoparticle Fe 3 O 4 can effectively increase the amorphous fraction of electrolyte polymer PVA.LiOH and magnetic properties carried by Fe 3 O 4 a new potential in development of electrolyte polymer.
THE IMPLEMENTATION ANALYSIS OF SELF ASSESSMENT TO ASSESS THE STUDENT OF XI SENIOR HIGH SCHOOL PERFORMANCE IN CHEMISTRY EQUILIBRIUM PRACTICUM Iis Intan Widiyowati; Fitria Usmanti
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2013
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Assessment is one of activity to measure and assess the achievement level of curriculum and success or not the process of learning, it is also used to know the strengths and weakness consisted in learning process. One of the alternative of assessment is self assessment. In this research, there is an analysis about implementation of self assessment to assess student of XI SMA performance in Chemistry Equilibrium practicum. This research used descriptive method, that describes a phenomenon in learning with statistical measures. This research instrument is compiled according to self assesment implementation rubric.This rubric consists of phases of self assessment implementation to assess student performance in practicum and contains several components such as ideal criteria of self assessment implementation, indicators of achievement, implementation stages feasibility, and data sources. The collecting data of this research comes from self assessment implementation, Student ability to do the self assessment, student performance. The collecting data in this research uses self assessment sheet.self assessment observation sheet, student questionairre, and student interview guide.All research data will be analyzed. The analysis result will be connected to literature, so it will conclude the implementation of self assessment in assess performance of practicum that has been done. This research result show that student ability on self assessment in scholl is very good. The student is categorized as very good in assess his or her performance. It indicates that the ideal criteria on implementation self assessment has been accomplished.
IDENTIFIKASI JAMUR PADA UMBI BAWANG MERAH (Allium cepa L.) YANG TERSERANG PENYAKIT DENGAN METODE BLOTTER ON TEST Hetty Manurung; Hendra Setiawan
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2013
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Penelitian ini dilakukan untuk mengidentifikasi jamur yang menyerang umbi bawang merah (Allium cepa L.) setelah pasca panen selama penyimpanan yang mengakibatkan busuk pada umbi bawang, dilakukan di Stasiun Karantina Pertanian Kelas 1 Samarinda Kalimantan Timur. Metode yang digunakan adalah Blotter On Test. Penelitian ini dilakukan sebagai salah satu usaha untuk mencegahpenyebaran penyakit pada tanaman yang diakibatkan oleh jamur khususnya penyakit busuk umbi pada bawang merah. Dari hasil penelitian yang dilakukan (isolasi dan identifikasi) diketahui bahwa jamur yang menyerang umbi bawang merah adalah golongan/suku Netriaceae yaitu jamur Fusarium sp. Ciri- ciri dari umbi bawang merah yang terserang jamur Fusarium sp. yaitu umbi akan menampakkan dasar umbi yang berwarna putih, karena adanya massa cendawan dan umbi membusuk dimulai dari pangkal umbi, jika diamati secara morfologi dari luar umbi akan nampak berwarna coklat kehitam-hitaman dan berair.
UJI TOKSISITAS (Brine Shrimp Lethality Test) EKSTRAK DAN ISOLAT FRAKSI KLOROFORM DARI DAUN KEREHAU (Callicarpa longifolia Lamk.) Arie Novadiana; Erwin -; Subur P Pasaribu
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2013
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Kerehau (Callicarpa longifolia Lamk.) is one of the biodiversity used as traditional medicine by one of the indigenous tribes of Borneo, called Dayak Tunjung. The purpose of this study was to determine about toxicity level of the Kerehau leaves (Callicarpa longifolia Lamk.) to larvae shrimps (Artemia Salina Leach) and to determine the content of the active compounds contained in the Kerehau leaves (Callicarpa longifolia Lamk.). The research was conducted by extracting samples with methanol and then concentrated by rotary evaporator. Total extract fractionated with n-hexane and chloroform, and then column chromatography applicated to chloroform fraction. Phytochemicals and BSLT have been test to Isolates chromatography results, total extract and chloroform extracts to determine the level of toxicity. Based on the results test of phytochemical compounds secondary metabolites of Kerehau leaves (Callicarpa longifolia Lamk.) indicated that the methanol extract containing steroid compounds, phenolics, and flavonoids. Chloroform fractions containing flavonoids and steroid compounds. Isolates Chloroform fraction containing Steroids compounds. On Brine Shrimp Lethality Test, death of larvae shrimps (Artemia Salina Leach) were recorded and processed using SAS Probit analysis to determine the value of Lethal Concentration (LC 50 ) to the value of each is, in chloroform isolates with LC 50 values of 96.4096 ppm, chloroform extract had LC 50 values of 104.1878 ppm and methanol extract had LC 50 values of 485.1681 ppm.

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