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Jurnal Pilar Sains
Published by Universitas Riau
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Core Subject : Science, Education, Agriculture,
Agriculture, Biological Sciences & Forestry Chemistry Mathematics Physics
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Articles 8 Documents
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Search results for , issue " Vol 7, No 1 (2008)" : 8 Documents clear
Susunan Kuadrat Latin Untuk Taste-Panel Experiments Adrian, Arisman
Jurnal Pilar Sains Vol 7, No 1 (2008)
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A taste-panel experiment is an experiment where several panellists score the taste of food using an ordinalscore, e.g. from 1 (extremely tender) to 8 (extremely tough). To avoid an order effect of the panellistposition, we apply a Latin square arrangement such that each sample appears once in each position. If thenumber of panellists available is less then the number of treatment combinations provided then we have anincomplete block design since we do not have a complete replication. Hence, these arrangements may not bebalanced. We use a special Latin square, the so called Williams design, to avoid a first carry-over effect andorder effect. The design can be balanced using an extension of William´s design. Finally, the arrangement oftreatment combinations was randomly permuted to avoid systematic bias due to the generation of Latinsquares.Key words: carry-over effect, ordinal data, Latin square, outliers, position effect, taste panel experiments
Penerapan Pendekatan Kontruktivis Dalam Pembelajaran Untuk Meningkatkan Hasil Belajar Struktur Aljabar Mahasiswa di Program Studi Pendidikan Matematika PMIPAFKIPUNRI
Jurnal Pilar Sains Vol 7, No 1 (2008)
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Evaluation has a very strategic position in teaching position in teaching process. Thus, there is no effort canimprove the quality of teaching without any steps of evaluation, that is recently called teaching reflection.Activities that construct the knowledge learned is an activity must be done, because this activity gives abetter control than teaching which is waiting the explanation question angd gives responds. The studentsprefer writing to asking. To improve such the condition, the writer did do an action research in teaching thestructure of algebra by applying the approach of construction in teaching processs by the students asevaluation implementers. There are circles of teaching done in this research, circle A and circle B. Both ofthem applied the constructive approach. The different is that action in circle B is an action of perfecting incircle A based on the evaluation by the students. The result of this evaluation toward the teaching is calledrespond. There are two ways in collecting the data, essay test and open observation test in order to answer theproblem. The data analyzed bybusing description, narration, table and diagram. Finally, the writer gives someconclusions. The first, there are positive influence felt by the students as long as they used that teachingprocess, the increasing of confidence, active-ness, interaction and self-confident to give responds. Thesecond, there are some problem faced by students during teaching process, such as, lack of confidence, lackof material mastering, material in English, laziness to discuss before class, bad responsibility in some groups,timing problem. In additional, some of the members of other groups complicate others students. The third,suggestions given by the students are using material in Indonesia, making Students Activities Papers (LKM)as guidance to increase the counseling of the lectures. In this case, the subjects are reguired to have positevethinking toward other students in giving responds or questions. In additional, they also construct goodassociation and activeness and manage their time well.Key word: evaluation, contraction, and circle learning result.
Perbaikkan Strategi Perkuliahan Melalui Pengembangan Perangkat Pembelajaran Elektronika Dasar 1 Di Prodi Pendidikan Fisika FKIP Unri Pekanbaru Rahmad, M.
Jurnal Pilar Sains Vol 7, No 1 (2008)
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The lecturer´s some constraint in Elementary Electronics 1 teaching: student´s electronics basic low,peripheral of less teaching, a few of reference, and less precise method. This matter cause learn result ofstudent relative low of Elementary Electronics 1 in physics education program FKIP UNRI. This Researchpuspose to look for alternative learning strategy to increase result of lecturing of Elementary Electronics 1through repair of peripheral of study. Research procedure divided any three phase: preparation, execution ofaction, and observation, evaluation, reflection. Phase execution of action consist of two cycle: cycle 1 usemethod deliver a lecture and demonstrate while cycle 2 discourse, demonstration, and experiment. Data resultof process learn to teach to be obtained from result of evaluation in the form of tes at cycle I and II withmeasuring indication determined from: 1) improvement of activity student learning of cycle to cycle, 2)reached value of student 85% getting value3 6,5. Research result from repair of peripheral of study withapplying of integrate discourse method, demonstration, and experiment in lecturing of ElementaryElectronics 1 can improve learn result which seen from mean result of tes at cycle 1 that is 73,34 and 80,44 atcycle 2.Key words: learning strategy, demonstration method, experiment method
Pengembangan Dan Implementasi Perangkat Pembelajaran Kimia SMA Model Pembelajaran Berbasis Portofolio Untuk Menunjang Pelaksanaan Kurikulum Berbasis Kompetensi Holiwarni, Betty
Jurnal Pilar Sains Vol 7, No 1 (2008)
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The development of instructional tool is based on not availability of material resources for applyingcompetency based curriculum proferly. In this research, it has been developed chemistry lesson tools, such asPeriodical system and Atomic Structure for Portofolio learning´s Model. Instructional tools validator iscarried out by validator who has knowledgeable/ experts on instructional models and chemistry lesson,whileous to over viewed/ observed the effectivity and runny well of instructional tools. It has beenimplemented all activities in class experiment. The instructional tools developed sylaby, insructional plan,student activity sheets, Evaluation sheets. The development instructional tools is based on Thiagarajan´sDesign, sammel and Sammel (1974). The model consists 4 stages and is well know as four-D Models. Theimplementation of chemical instructional tools has breen running in class with classroom action researchwhile subjeck orf this research is MAN 2 Pekanbaru. The result of research conclusison is instructional tools,Validation and implemantation in class shows the instructional tools of portofolio model is valid, practicaland effective to support competency based curriculum in learning process.Key word : Model Pembelajaran Portofolio, Kurikulum Berbasis Kompetensi
Modifikasi Amilosa dari Pati Tapioka dan Garut Menjadi Amilosa Asetat Erna, Maria; Eryanti, Yum; Dahliaty, Andi
Jurnal Pilar Sains Vol 7, No 1 (2008)
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It has been done modification of amylose from starch tapioca and garut and then it has been changed to beamylose acetate which is degradable biopolymer. Amylose was separated from starch by method of butanolas complexing on high temperature and pressure. The yielded amylose was then acetylated by anhydrideacetate acid in glacial acetate acid solution with catalyst of concentrated sulfuric acid. Characterization wascarried out based on spectrometry of Fourier Transform Infrared Spectroscopy (FTIR). The result of amilosaspectrum showed that peak of group -OH was on 3437.25 cm and amilosa acetate spectrum had peak on1749.91 cm and it proved that acetyl reaction occurred. In this research, modification of starch tapioca wassuccessful but starch garut unsuccessful.Key words : amylose, acetate amylose.
Degradasi Senyawa Alizarin-S Secara Sonolysis dan Fotolisis dengan Penambahan TiO2-Anatase Zuki, Zamzibar; Sakai, Tadao
Jurnal Pilar Sains Vol 7, No 1 (2008)
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Degradation of alizarin S dye by added TiO2-anatase had been done by Sonolysis and Photolysis. Sonolysismethod used ultrasonic radiation with frequency on 47 kHz. Degradation of 20 mg/L Alizarin S by addedTiO2-anatase 0,1000 g, optimum pH 5.0, temperature 50± 1 °C and percentage of degradation has reached for100 % after sonolizing for 30 minutes. Photolysis method used UV light irradiation with wavelength is 359nm. Degradation of 20 mg/L alizarin S as photolysis by added TiO2-anatase 0,1000 g, optimum pH 5.0.Percentage of degradation has reached for 100 % after irradiating for 30 minutes.Keywords: Alizarin-S, Sonolisis, Photolysis
Struktur Komunitas Arthropoda Dalam TanahPada Areal Perkebunan Karet (Hevea bransiliaensis) Di Kec. InumanKab. Kuantan Singingi - Riau Febrita, Elya; Mayrita, Eka
Jurnal Pilar Sains Vol 7, No 1 (2008)
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Have been done the research to know the community structure of deep soil Arthropoda in the rubberplantation {Hevea bransiliaensis) area at Inuman district, Kuantan Singingi, which is conducted on Octoberuntil December 2006. the point of the research station was held based on purposive random sampling whichis shown that age of the rubber are 1 year, than 5 years and last 10 years and the areas about 100 x 100 mlarge. The Arthropoda is held by applying dinamical method which use Barles Tulgreen. The parameters use: physics and chemist that talk about pH, temperature, water content of soil, organic material of soil and soiltexture, while biology are composition, domination index, diversity index, equitability index and distributionindex. The result of research shows Arthropoda composition deep soil is about 7 ordo, 11 species and 344individual, in which Hymenoptera and Collembolla ordo was plentiful found. The lower domination is about0,1274 - 0,2271, it means that there no animal dominated, the diversity is about 1,6637 - 2,2021, is means theamounts of species personal are not various, the higher aquatability is about 0,7676 - 0,9193, so it means thatthe spread of individu are fixed and no domination. The Arthropoda variety on the ground in piece A (0 -15cm) is higer than piece B (15 - 30 cm). The vertical distribution on the three station shows the clumpeddistribution.Key words : Deep soil Arthropoda, Community structure, Hevea bransiliaensis plantation
Analisis ketuntasan hasil belajar biologi Siswa Kelas Xi Semester 1 SMA Negeri Kampar Tahun Pelajaran 2006/2007 Yusuf, Yustini; Tambunan, Erika
Jurnal Pilar Sains Vol 7, No 1 (2008)
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The aim of the research is to know the result of the students´lerning of senior high school Negeri Kampar,Kampar district which has running on the Curriaelum Based on Competence (KBK). This research was doneat Kampar district from September to December 2006. The population of this research are all the students atthe XI degrees of the govermant school senior high school Negeri Kampar, academic year 2006/2007, whilethe sample of the research are the students at the XI degrees of Senior High School Negeri 2 Air Tiris, SeniorHigh School Negeri 2 Bangkinang and Senior High School i Kampar. This is a descriptive research,parameter of measurement is the level of the final of individual learning and clasicall which is include of theaspect of cognitif, psicomotor and affective. The result of this analysis of the final of biology learning of thestudents at the XI degrees of the first semester in Senior High School Negeri Kampar academic year2006/2007, the highest of cognitife ability of the clasicall final based on the national standard is Senior HighSchool Negeri 2 Air Tiris XI degress science mayor (60%), the highest level for the psicomotor ability basedon the national standard is Senior High School Negeri 1 Kampar Xi degrees science mayor (64.28%) and thehighest leave] for the clasicall final of the affective ability based on the national standard is Senior HighSchool Negeri I Kampar XI degrees science mayor (92.85%).Keyword: final Result, Biology, Curriaelum Based on Competence (KBK).

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