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INDONESIA
PROSIDING SEMINAR KIMIA
Published by Universitas Mulawarman
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Articles 50 Documents
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Search results for , issue "PROCEEDING OF INTERNATIONAL CONFERENCE 2015" : 50 Documents clear
THE DEVELOPMENT OF ENVIRONMENT INSTRUCTIONAL MEDIA TO INCREASE THE STUDENT’S RESPONSIBILITY IN ELEMENTARY SCHOOL OF FLOODING PROBLEMS Masitah -; Sonja VT Lumowa; Richart Singal
PROSIDING SEMINAR KIMIA PROCEEDING OF INTERNATIONAL CONFERENCE 2015
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The development of environment instructional media to increase the student’s responsibility of flooding problems which happen in Samarinda East Kalimantan. It is necessary because of flooding is a problem that is very common in Samarinda,The Student’s in Elementary School must have a responsibility early because of that it is important to development an instructional media which can make the right responsibility for this problem, in the second year of this research have the aim to know the effectivity of this media. There are two class, the first class is control and the other is experimental class with have the same ability, from the result of t - test we know that the probability of t -test is less than 0.05 it’s mean that there are the difference between control class and experiment class which instructional media used. The conclusion of this research is this instructional media have the effectivity for increase the responsibility of flooding problems
VALIDITY OF LEARNING MODEL FOR IMPROVING JUNIOR HIGH STUDENTS’ ARGUMENTATION SKILLS AND SCIENCE CONCEPT UNDERSTANDING Rini N. Astuti; Suyono -; Mohamand Nur
PROSIDING SEMINAR KIMIA PROCEEDING OF INTERNATIONAL CONFERENCE 2015
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Argumentation is a very important process in leaning science. Learning science that involve argumentation can train students to be able to scientifically argue about a concept, defend their arguments, and refuse others by giving supporting evidence also logical reasons. From few researches been done, obtained that learning which involve argumentation can improve students’ argumentation skills and concept understanding. This research used to get learning model that can improve junior high students’ argumentation skills and science concepts understanding. A model that developed is focusing on 4 aspects of argumentations skills are, (1) deciding claim, (2) giving supporting evidence according to the claim, (3) organize reason, (4) organize counter-argument. This model is developed based on validation result by science learning expert through Focus Group Discussion (FGD) program. Two results obtained from that program. First, the developed model has a goal to increase argumentation and science concept understanding. Second, learning syntax (teacher and student-activities) consist of five phases, which are orientation, exploration, pre-argument, argument and counter-argument, and last reflection.
CHEMICAL COMPOSITION PROFILE OF TAMBELO (Bactronophorus sp.) THAT LIVES IN RHIZOPHORA SP. IN SOUTHEAST SULAWESI COAST Lely Okmawaty Anwar; Ary Tamtama; Maulidiyah -; Muhammad Nurdin
PROSIDING SEMINAR KIMIA PROCEEDING OF INTERNATIONAL CONFERENCE 2015
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Tambelo (Bactronophorus sp.) is a wood borer grouped into mollusc. Tambelo lives in died and decayed mangrove logs. Based on the empirical experiences of the coastal people of Southeast Sulawesi, it indicated that tambelo is rich in nutrition for humans health. Tambelo is highly perishable and it is rarely processed. Tambelo (Bactronophorus sp.) in Southeast Sulawesi coast lives in several kinds of mangroves. One of which is on Rhizophora sp. and has sweet and savory in taste. The objectives of this research were to get information about the chemicals composition, amino acids and fatty acids profile of tambelo. Proximate analysis was used to determine chemicals composition (water, protein, fat, carbohydrate, and ash). Metode HPLC was used to determine amino acid composition and composition of unsaturated fatty acids using Gas Chromatograph (GC). Quantitative datas was processed by simple statistical method (average and standard deviation). The data that have been processed was descriptively analyzed. The results of this research showed that the fresh tambelo has 82,51 % of total water content, 8,21 % of protein content, 3,34 % of fat content, 3,68 % of carbohydrat content (by different), and 2,27 % of ash content. The protein content of composed of 17 amino acid that consisted of 9 essential amino acids and 8 nonessential amino acids. The highest content of essential amino acid is leucina and the highest non essestial amino acid is glutamic acid. The highest content of unsaturated fatty acidc is oleic (MUFA) and linoleic (PUFA).
THE INFLUENCE OF THE IMPLEMENTATION OF PROJECT BASED LEARNING LEARNING MODEL USING CHEMOENTREPRENEURSHIP APPROACH ON THE LEARNING OUTCOME AND ENTREPRENEURSHIP INTEREST OF SMA NEGERI 1 SAMARINDA SCIENCE PROGRAM STUDENT ON COLLOIDAL SYSTEM TOPIC IN 2014/201 Ratna Kusumawardani; Rexy Anderson Tindangen
PROSIDING SEMINAR KIMIA PROCEEDING OF INTERNATIONAL CONFERENCE 2015
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This research objective was to determine the influence of the implementation of Project Based Learning (PjBL) learning model with chemoentrepreneurship approach on the learning outcome and entrepreneurship interest of SMA Negeri 1 Samarinda student on colloidal system topic. The population was all eleventh grade students of SMA Negeri 1 Samarinda science program, meanwhile the sample was the eleventh grade students of 5th Science program class. This research used one shot pretest-posttest design, which only use 1 class as sample. The influence was determined by comparing the result of pretest and posttest and analyzed by using t test method, meanwhile the learning outcome and entrepreneurship interest improvement category were analyzed by using N-gain method. The results of the implementation of Project Based Learning (PjBL) learning model with chemoentrepreneurship approach showed a significant influence on the learning outcome and entrepreneurship interest of SMA Negeri 1 Samarinda student on colloidal system topic. According to N-gain test, the students’ learning outcome on first and second meeting has improved and the improvement is on medium category, meanwhile the students’ entrepreneurship interest also improved and the improvement is on low category.
THE POTENTIAL OF SECONDARY METABOLITES COMPOUNDS OF METHANOL EXTRACT STEM BARK MELOCHIA UMBELLATE AS ANTI-BACTERIAL Usman -; Nunuk Hariani S; Hanapi Usman; Ahyar Ahmad
PROSIDING SEMINAR KIMIA PROCEEDING OF INTERNATIONAL CONFERENCE 2015
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A Study antibacterial essay of the methanol extracts of steam bark M.umbellate (Houtt) Stapf var. degrabrata (Paliasa). The results of this study showed that the methanol extract from the bark of M. umbellate (Houtt) Stapf var. degrabrata group of compounds containing alkaloids, flavonoids, triterpenoids, phenolics and saponins. Methanol extract from the bark of M. umbellate can inhibit the growth of bacteria Bacillus subtilis, Staphylococcus aureus, gram-negative bacteria as well as representing Escherichia coli, Salmonella thypi, and Pseudomonas aeruginosa representing gram-positive bacteria. At a concentration of 400 ppm of methanol extracts of these plants showed effective barrier against bacteria tested, with a zone of inhibition, respectively as follows: 12.67 mm against bacteria B. subtilis, 12.97 mm against bacteria, S. aureus, 11.86 mm against bacteria E. coli and 12.12 mm against bacteria S. thypi. However, methanol extract from the bark of
OPTIMATION ANALYSIS OF AMMONIA CONTENT IN THE ELECTROLYSIS METHOD USINGCARBON ELEKTRODE Muflihah -; Rexy Anderson Tindangen; Nova Adelia Noor
PROSIDING SEMINAR KIMIA PROCEEDING OF INTERNATIONAL CONFERENCE 2015
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Hydrogen is a source of alternative fuel which can be sustained. It is clean fuel since it burning residue is water. One method to obtain hydrogen is water electrolysis, but it is highly cost. Alternatively, hydrogen can be obtained by ammonia electrolysis using carbon electrode.This research was experimentally design to find the most optimum electrical current and KOH concentration in ammonia content analysis using carbon electrodes.Based on the data results, it is concluded that current variation in the elektrolysis using carbon electrodes directly proportional toward ammonia conversion level. As the current increase, more ammonia converses. On the contrary, variation of concentration is inversely proportional toward ammonia amount.
BIOSORPTION OF CADMIUM (Cd) AT GREEN COCO FIBER (Cocos nucifera) WAS ACTIVATED BY USING ATOMIC ABSORPTION SPECTROPHOTOMETER (AAS) METHOD Syamsidar HS; Yuniati Udin
PROSIDING SEMINAR KIMIA PROCEEDING OF INTERNATIONAL CONFERENCE 2015
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Various human activities are potentially produce heavy metal waste. The waste if it is not treated properly will cause environmental pollution and are toxic to organisms living including humans. Biosorbent has several advantages, including relatively low cost and easy to obtain.The use coco fiber as biosorbent is one good use of waste to reduce environmental pollution. Has conducted research cadmium biosorption (Cd) on biosorbent green coconut coir fiber (Cocos Nucifera) activated NaOH. This study includes the determination of the optimum concentration for activation biosorbent base, determination of optimum pH, determining the optimum time and capacity biosorption by using atomic absorption spectrophotometer (AAS).The results showed that the highest concentrations of NaOH activation biosorbent is 1.8 M or 11.2310 mg / L. The highest pH used by biosorbent activated is pH 2 or 19.6 mg / L, the highest timing needed to adsorb Cd is 30 minutes ie 14.7941 mg / L, whereas the highest biosorption capacity at a concentration of 70 ppm is 32.2882 mg / L
THREE PRENYLATED FLAVONOIDS FROM MACARANGA PEARSONII MERR. Eva Marliana; Tjitjik Sri Tjahjandarie; Mulyadi Tanjung
PROSIDING SEMINAR KIMIA PROCEEDING OF INTERNATIONAL CONFERENCE 2015
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Three prenylated flavonoids, 4’-O-methyl-8-isoprenyleriodictiol (1), 4’-O-methyl-8-isoprenylnaringenin (2) and lonchocarpol A (3) have been isolated from the leaves of Macaranga pearsonii Merr.. The structure of compounds have been elucidated based on its spectroscopic data, including UV, 1D and 2D NMR, and HREISMS spectra.
Synthesis of Polyol As Lubricant Base Via Epoxydation and Hydroxylation Reactions of Moringa oleifera Seed Oil Ade Danova; Daniel Tarigan; Erwin -
PROSIDING SEMINAR KIMIA PROCEEDING OF INTERNATIONAL CONFERENCE 2015
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Moringa oleifera seed oil has potential as a base material in the synthesis of polyol, because the most content of fatty acid was oleic acid (up to70.7167%). Polyol could be used as a lubricant base. Polyol research of Moringa oleifera seed oil had been done via epoxidation and hydroxylation of one step reaction, where the polyol was characterizated by FT-IR spectroscopy shown absorption –OH group in the number of wave 3379.29 cm-1 and the number of iodine with iodometri methods that decreased from 107.3769 to 3.6755 mg I/g. Quality polyol test as a lubricant base consists of specific gravity (0,978), kinematic viscosity (216.702 cSt at 40oC and 21.116 cSt at 100oC) and viscosity index (111.013). Where they could be reported on the test results that the seeds of Moringa oleifera oil polyol was better than Moringa oleifera seed oil to use as a lubricant base, because it had committed with quality SAE J306 standards and classification SAE in manual gear oil, transmission and axle in lubricants group SAE 90 based to result from kinematic viscosity at 100oC.
EFFECTS OF CYTOKININ TYPES AND THEIR CONCENTRATIONS ON CALLUS FORMATION FROM DIFFERENT SOURCES EXPLANTS OF SARANG SEMUT PLANT (Myrmecodiatuberosa Jack.) Yanti Puspita Sari; Wawan Kustiawan; Sukartiningsih -; Umrah -
PROSIDING SEMINAR KIMIA PROCEEDING OF INTERNATIONAL CONFERENCE 2015
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This study aim was to determine the influence of types and different concentration of cytokinin on the callus formation. The different sources of explant (cotyledons, stems, tubers, roots) from sarangsemut plants was cultured in Murashige-Skoog medium, supplemented with various levels of 2.4 Dichlorophenoxy Acetic Acid (2.4 D)viz0.5; 1; 1.5; 2 mg/l and combined with 2mg/l kinetin were performed to investigate callus formation. The results showed that the best callus formation was found on medium-supplemented with 2 mg/l 2,4-D and 2 mg /1 Kinetin on four sources of explant used. In addition, phenolic, alkaloids, flavonoids, tannins and steroids were also present in the callus.

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