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Sainstek
Published by Universitas Negeri Gorontalo
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Core Subject : Education,
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Articles 9 Documents
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Search results for , issue "Vol5, No 1, 2010" : 9 Documents clear
TINJAUAN SIFAT-SIFAT AGREGAT UNTUK CAMPURAN ASPAL PANAS (STUDI KASUS BEBERAPA QUARRY DI GORONTALO) Achmad, Fadly
Sainstek Vol5, No 1, 2010
Publisher : Sainstek

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Abstract

Agregat merupakan komponen utama dari campuran aspal panas (hotmix) yaitu 95% dari total berat campuran. Di Provinsi Gorontalo, terdapat beberapa sumber agregat (quarry) yang digunakan untuk memproduksi hotmix. Berkaitan dengan hal itu, penulis melakukan penelitian tentang sifat-sifat fisik agregat yang digunakan pada campuran aspal panas. Penelitian ini difokuskan pada Quarry Pilolalenga, Quarry Tangkobu dan Quarry Molintogupo yang masing-masing dikelola oleh perusahaan kontraktor di Provinsi Gorontalo. Sebagian besar campuran aspal untuk lapis permukaan jalan yang ada di Provinsi Gorontalo menggunakan agregat yang berasal dari lokasi material di atas. Berdasarkan hasil pengujian sifat-sifat agregat yang telah dilakukan, dapat disimpulkan bahwa ggregat yang berasal dari Quarry Pilolalenga memenuhi spesifikasi Bina Marga 2007. Agregat yang berasal dari Quarry Molintogupo, agregat halus lolos saringan no. 200 tidak memenuhi spesifikasi yakni 8,38% > 8 %. Agregat yang berasal dari Quarry Tangkobu, agregat kasar lolos saringan no. 200 tidak memenuhi spesifikasi yakni 1,30% > 1 %. Kata-kata Kunci : agregat, gradasi, quarry.
TINGKAT ADOPSI PETANI TERHADAP TEKNOLOGI INSEMINASI BUATAN PADA SAPI DI KECAMATAN PAGUYAMAN Yenny Pateda, Sri
Sainstek Vol5, No 1, 2010
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Abstract

Inseminasi buatan merupakan salah satu teknologi dalam reproduksi ternak yang memiliki manfaat dalam mempercepat peningkatan mutu genetic ternak, mencegah penyebaran penyakit reproduksi yang ditularkan melalui perkawinan alam, meningkatkan efisiensi penggunaan pejantan unggul, serta menurunkan/ menghilangkan biaya investasi pengadaan dan pemeliharaan ternak pejantan.Namun berhasil tidaknya pengembangan tekhnologi ditentukan oleh mau tidaknya petani mengadopsi teknologi yang dianjurkan sedang keputusan mengadopsi suatu tekhnologi banyak dipengaruhi sifat tekhnologi. Penelitian ini akan dilakukan di kabupaten Bualemo selama 3 bulan dengan mengambil sampel pada petani sebanyak 40 orang dengan kriteria memiliki hubungan kerja dengan UPTD pengembangan Ternak Wonggahu di kecamatan Paguyaman Kabupaten Boalemo.Pengambilan sampel untuk lokasi dipilih secara sengaja yakni Kecamatan Paguyaman .Data yang diperoleh adalah data kwalitatif yang diberi skor kemudian ditabualsi dan diolah serta dianalisis secara deskritif. selanjutnya untuk mengukur tingakt adopsi menggunakan rumus presentasi nilai. Hasil yang diperoleh menunjukkan bahwa tingkat adopsi tekhnologi inseminasi buatan pada ternak sapi adalah sebesar 85 % telah menerapkan dan 15 % termasuk golongan yang menolak untuk mengadopsi inseminasi buatan. Kata Kunci : Tingkat Adopsi, Inseminasi Buatan,Ternak Sapi
PEMBUATAN LAPISAN TIPIS MANGAN OKSIDA DAN LITIUM-MANGAN OKSIDA PADA SUBSTRAT KACA DENGAN METODA DIP-COATING MELALUI PROSES SOL-GEL Warda Ningsih, Sherly Kasuma
Sainstek Vol5, No 1, 2010
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Abstract

Preparation of manganese oxide and lithium-manganese oxide thin layer on glass substrate by dip-coating method via sol-gel process have been investigated. Manganese (II) nitrate tetrahidrate and lithium chloride were used as precursors, isopropanol as solvent and DEA as additive. Dip-coating process have been done on glass substrate at 6 times with dipping time around 2 minutes for each layer process and dried at 110-120 oC around 15 minutes. Dried samples heated at 400 oC, 500oC and 600oC during 120 minutes. Black thin layer were obtained as products. The products were characterized by X-ray Diffraction (XRD) and Scanning Electron Microscopy (SEM). The XRD pattern was shown manganese oxide thin layer were obtained Mn2O3 only. Crystal structure of Mn2O3 was orthorombic with crystallite size around 13.0 nm (JCPDS No. 24-0508). SEM image (at 500oC) showed uniform and smooth surfaces with grain size around 0,01 m. The XRD patterns showed that lithium-manganese oxide thin layer were obtained LiMn2O4 and small amount of Mn2O3. Crystal structure of LiMn2O4 was spinnel with crystallite size around 16.86 nm (JCPDS No. 35-0782). SEM images (at 400 and 500oC) showed fiber form were produced generally and spheric form at 600oC. Key words : lithium-manganese oxide, dip-coating, sol-gel, fiber, spheric,
ISOLASI, KARAKTRISASI DAN PEMURNIAN MINYAK LIMBAH IKAN CAKALANG (Katsuwonus pelamis, L) Fatimah, Feti
Sainstek Vol5, No 1, 2010
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Abstract

Fish represent the ordinary food substance consumed especially for society which live in the coastal area like Town of Manado of Sulawesi Province. This research has conducted to isolate fish oil from cakalang, malalugis, visceral extracted by refluks for 7 hours using chloroform as eluent. Oil quality yielded examined by the acid value and also fatty acid profile determination use the gas chromatography .technique. The purification used the adsorption chromatography by active charcoal.has done to improve the quality of fish oil The result shows that yield of oil obtained from Cakalang fish waste was: 4,67 %, The acid value from Cakalang fish oil was 20,08 %. The EPA and DHA content from cakalang waste oil was 17,96 mg100g oil and 103,08 mg/100g oil There were difference result of fatty acid profile from the purification process. Rate of EPA and DHA was degrade after purified. Keywords: fish oil, cakalang, Manado, adsorption chromatography
Analisis RAPD ( Random Amplified Polymorphic DNA)untuk Diferensiasi Mycobacteriun tuberculosis isolat klinik sensitif INH dan Rifampisin di Makassar Yusuf, Zuhriana K.
Sainstek Vol5, No 1, 2010
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Abstract

This study aims to find out: (1) whether there is a genetic diversity on M.tuberculosis isolat clinic that is sensitif to INH dan rifampisin with RAPD method, and (2) the description of its polimorfism diferentiation. The research samples include 5 Mycobacteriun tuberculosis isolate that is sensitive to INH and rifampisin. The study includes DNA extraction using Wizard Genom DNA purification method, amplification using 5 primer: A-2 (5 TGCCGAGTCG 3 , 70% G+C ), OPN-09 ( 5TGCCGGCTTG 3, 70% G+C), N-9 (5 TGCCGGCTTG 3, 70% G+C), BG-66 (5CGACGCTGCG 3, 80% G+C) , 80% G+C), U-19 ( 5 GTCAGTGCGG 3, 70% G+C), and electroforesis. The isolat genetic diversity was analysed by using Dendro Unweighted Pair Group Method of Aritmethic (UPGMA) : A Dendogram Construction Utility method from Dr. Santi GarciaValive/2009. The results show that there is a genetic diversity on the 5 isolate Mycobacterium tuberculosis that are sensitive to INH and rifampisin, amplified with 5 primer. The size of amplified DNA bands is between 200-1100bp. The genetic variation can be seen in the number of fragments, the size of fragments and the number of polimorfik bands. The polimorfik percentage of the isolate is between 66.67% - 100%, or 80.28 in average. The UPGMA analysis results in a dendogram with a group cooficient of 0 40% or a diversity of 60 100%. Keywords: RAPD, Mycobacterium tuberculosis, sensitive to INH and rifampisin.
STUDI PENYERAPAN ION KROM(III) OLEH BIOMASSA AMPAS TEBU (Saccharum Spontaneum ) DALAM AIR ., Bahrizal
Sainstek Vol5, No 1, 2010
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Abstract

In the present work, the process of chrom(III)-ion adsorption by S. spontaneum biomass have been investigated. This investigation intend to determinate capacity of adsorption the biomass for chrom(III) ion in water. A weight of 1 g biomass was put ionto 10 ppm of the metal-ion solution whose pH varied from 4.0 to 6.0. Then, these solutions were stirred for 120 minutes. After filtering, the metalion concentration in the filtrate was determined by atomic absorption spectrometry. The amount of ion adsorbed by the biomass was taken as the difference between the initial and final concentration of the solution. Further, the same method was carried out to the varied concentration. The result showed, the optimum pH for metal-ion adsorption by the biomass is 5.5, having adsorption value 0.128 mg/g. Capacity of khrom(III)-ion adsorption was obtained by varied concentration, yielded value of 0.318 mg/g. Key word: S. spontaneum, biomass, adsorption, spectrometry
EKSTRAK DAUN TEH (Camellia sinensis) SEBAGAI ALTERNATIF INHIBITOR KOROSI BAJA DALAM MEDIUM AIR LAUT ., Yerimadesi
Sainstek Vol5, No 1, 2010
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Abstract

Research about the use of tea leaf (Camellia sinesis) as steel corrosion inhibitor alternative in sea water medium has been done. The aim of this research is to find out the influence of tea leaf extract on the rate of corrosion, the degree of closeness and efficiency of steel corrosion inhibition in sea water medium. The method used is weight loss method (the deficiency of weight). The steel sample has the code of ASSAB 760 (AISI 1148, 0.5%) and the tea leaf sample used is the old tea leaf. The tea leaf is extracted with aquadest as the solvet. The characteristic of steel surface endued and unendued by inhibitor are then analyzed with Carton Stereo Trinocular Optic Photo with 100 times magnification. The result of research shows that the tea leaf extract reduces the rate corrosin of steel ASSAB 760 in sea water medium. The rate of steel corrosion unendued by inhibitor is 1.13 x 10-4 g/cm2.day, the rate of steel corrosion endued by inhibitor (tea leaf extract) is 1.07 x 10-5 g/cm2.day. The efficiency of steel corrosion inhibition increases along with the longer of steel soaked in sea water medium. The analysis of steel surface shows the formation of purple pasive layer from iron-tanin complex. Key words: tea leaf extract, steel corrosion, inhibitor, sea water, iron-tanin complex.
PENENTUAN UMUR STALAGMIT PROVINSI GORONTALO SEBAGAI PROXY DATA PALEOKLIMAT YUNGINGER, RAGHEL
Sainstek Vol5, No 1, 2010
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Abstract

Climate and weather area more varied and diverged, in which it impacts Indonesia significantly. Some people worry about this situation, especially they who are from agricultural, plantation, forestry, naval, and transportation areas. It becomes a consideration for the government to increase community economic activity, involving Province of Gorontalo. Moreover, Province of Gorontalo planned for Agropolitan in order to develop community economic system, so that, a preventive attempt need to find to cope climate impact. It can be conducted by providing sufficient data about past chronological climate. This data may give information about climate cycle and climate pattern that may appear in tropical area, especially in Province of Gorontalo. This research, however, is still limited to the determination of stalagmite sample age, in which it uses radiocarbon method. This method shows stalagmite sample from Province of Gorontalo has age shift of: Regency of Gorontalo 1 has 3410 130 BP age; Regency of Gorontalo 2 has 1960 130 BP; regency of Boalemo has 1830 130 BP; and regency of Pohuwato has 3190 130 BP. Stalagmit sample in the province of Gorontalo can be used to add and elongate data for paleoklimat analysis. Rapid rate of precipation for respective sample are regency of Gorontalo 1: 0.17 mm/th, sample from regency of Gorontalo 2: 0.25 mm/th, sample from regency of Boalemo mm/th, and sample from regency of Pohuwato: 0.19 mm/th. Thus, stalagmite sample from Gorontalo can add time period to determine paleoklimat chronology pattern. Key words: stalagmite, Paleoklimat, Radiocarbon method, Climate.
ANALISIS KERUNTUHAN LERENG DAN SOLUSI PERBAIKANNYA PADA BANGUNAN SPBU SAMBIPITU - KABUPATEN WONOSARI Nasibu, Rito
Sainstek Vol5, No 1, 2010
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Abstract

The building of Sambipitu Gas Station had collapse after the heavy rain in November 2000 and operates recently during one month after the building had rebuilt up. Area condition was congeries land of the area by the side of slope. Based on the data analysis result, it was found that the main reason of the collapse was the unstable of land restraint wall. It was caused by the design of foundation dimension that not good and the construction that was low-grade. In addition, the descent of the congeries in the back of wall by water permeation from the surface and land-watercourse caused the unstable of land restraint wall. Therefore, it solidifies the congeries of the back of wall pair and effect to the fracture by the outside of wall that was piping. This piping flow the land water that collapses the yard and caused the difference of office building descent in foundation side of near yard that collapse. The solution that was suggest was improve the construction quality in field and attend to the method with priority scales of which work that has to be first in order it doesnt risk the following work, considering the gas station work consist of some works such as civil building, mechanic, electric and the utility of other supporting buildings. Keywords: landslide, piping, construction quality

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