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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 54 Documents
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Modifikasi Amilosa dari Pati Tapioka dan Garut Menjadi Amilosa Asetat Erna, Maria; Eryanti, Yum; Dahliaty, Andi
Jurnal Pilar Sains Vol 7, No 1 (2008)
Publisher : Jurnal Pilar Sains

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Abstract

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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Abstract

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)
Publisher : Jurnal Pilar Sains

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Abstract

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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Abstract

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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