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Sainstek : Jurnal Sains dan Teknologi

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Published by Institut Agama Islam Negeri Batusangkar

ISSN : 20858019 EISSN : 2580278X DOI : http://dx.doi.org/10.31958/js

Core Subject : Science, Education,

Computer Science & IT Other

Arjuna Subject : Umum - Umum

Articles 212 Documents

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PENGARUH KOMBINASI PETRAGENOL DAN EKSTRAK JERUK TERHADAP FEEDING STRATEGY LALAT BUAH Bactrocera dorsalis Sumarmi, Ramadhan
Sainstek : Jurnal Sains dan Teknologi Vol 3, No 1 (2011)
Publisher : IAIN Batusangkar

Petragenol is an attractant contained methyl-eugenol. It is an insect?s pheromone signaling for mating, made colony, and feeding. The oranges had too an attractants especially for fruit flies. The aim of this research was to know the influence of combination of oranges extract and petragenol to Feeding Strategy of Bactrocera dorsalis flies. This research used the Y tube method. The 60 fruit flies were used as samples. The 10 flies were placed in start chamber Y tube and in two other tips were placed the bait as a single or combinations of non-matured oranges extract and petragenol (A), matured oranges extract and petragenol (B), decay-oranges extract and petragenol (C), and petragenol as control (D). Feeding Strategy defined by the need of time to reach the bait and the spend of time in the bait with categories as activity of Searching, Grounding, Gathering, and Learning. The data analyzed by Chi-square (X2). The results showed that the fastest searching activity in B, the longest time to gathering activity in A, the longest time to grounding activity in non-matured oranges extract, and the longest time to learning activity in matured oranges extract. It can conlude that the best attractant to teas Bactrocera dorsalis Feeding Strategy are matured oranges extract-petragenol combination for Searching and Learning activity, and combination of non-matured oranges extract and petragenol to grounding and gathering activity.Key words: petragenol, oranges extract, feeding strategy

DETEKSI STASIONERITAS DATA RUNTUN WAKTU MELALUI UJI AKAR-AKAR UNIT Rusdi, Rusdi
Sainstek : Jurnal Sains dan Teknologi Vol 3, No 1 (2011)
Publisher : IAIN Batusangkar

even though there is no meaningful relationship between the two variables. Sometime we expect no relationship between the two variables, yet a regression of one on the other variable often shows a significant relationship. This situation exemplifies the problem of spurious regression. Spurious regression problem may arise from regressing a nonstationary time series variable on one or more nonstationary time series variable(s). Therefore, it considers important to be able to determine whether a time series data is stationary or not. A time series data is called stationary if it does not contain any unit roots. A test of stationary (or nonstationary) has become widely popular since the last two decades is the unit root test. This paper is meant to explain how to use unit root test in time series model especially for an autoregressive time series model.Key words: autoregressive time series, stationary, unit root

RESONANSI PADA RANGKAIAN RLC LIZELWATI, NOVIA
Sainstek : Jurnal Sains dan Teknologi Vol 3, No 1 (2011)
Publisher : IAIN Batusangkar

In an ac circuit containing inductance L, resistance R, and capacitance C, when Xc=XL , the applied voltage V and the current I are in phase, this effect is called resonance. To RLC series ac circuit resonant frequency is got when the value of electric current maximum and minimum to RLC parallel ac circuit. The result an exsperiment, in RLC series ac circuit by using R = 99,5 ohm and R= 32,136 ohm have frequence resonance 1800 Hz, and 1950 Hz for R = 9,185 ohm.Whereas in RLC parallel ac circuit with R = 99,5 ohm have frequence resonance 2000 Hz, and have range 1800 ? 1900 Hz to R= 32,136 ohm,if R = 9,185 ohm frequence resonance 1800 Hz. The value frequence resonance by using formula on theory is 1808,53 Hz. So can get conslusion that the difference of value frequence resonance in exsperiment not significant with theory.Key words: eksperiment of phisic, RLC series ac circuit, RLC parallel ac circuit, resonant frequency

EXPLORASI DAN MUTU BERAS GENOTIP PADI MERAH DI KABUPATEN PASAMAN BARAT SUMATERA BARAT Anhar, Azwir
Sainstek : Jurnal Sains dan Teknologi Vol 5, No 1 (2013)
Publisher : IAIN Batusangkar

The purpose of this study was to determine the nutrient content based on the phenotype of red rice in West Sumatra West Pasaman. The study was conducted in the West Pasaman by doing a survey to determine and collect the red rice in the area. Limited access to isolated areas growing regions in the rice collection was also done by buying rice from the traditional market vendors West Pasaman. Analysis of the nutrient content in the form of protein and amylose conducted in the Laboratory of Chemistry Department of Chemistry, State University of Padang. The results showed that in the West Pasaman found 5 red paddy rice genotypes. Amylose content ranged from 27.16% to 40.13% Island Manggis until at Nabara. Protein content ranged from 5.93% to 8.72 on the genotype Nabara Cimarisik genotype. Based on these results it can be concluded that the Dolok Nabara (8.25%) and Cimarisik (8.72%) developed considering the potential for relatively higher protein content than rice genotypes grown in West Sumatra. In conclusion, the amylose content of the five genotypes were high.Key words: explorasi, genotip, quality rice, red rice, west pasaman

PEMODELAN INVERSI DATA GEOLISTRIK 1-D UNTUK MENENTUKAN JENIS DAN KEDALAMAN BATUAN DASAR Sudiar, Nofi Yendri; Akmam, Akmam
Sainstek : Jurnal Sains dan Teknologi Vol 5, No 1 (2013)
Publisher : IAIN Batusangkar

Large earthquakes that occurred in the city of Padang had been expected to lead to changes in the structure of rocks beneath the surface composition including bedrock. Information about the composition of these rocks can be obtained by conducting geological surveys by using geoelectric methods (resistivity). This method is very good to know the condition or subsurface geological structures based on variations in resistivity. Research is inversion modeling. Equation used is forward modeling of resistivity 1-D using Jacobi matrix element finite difference approach. The data used are secondary data obtained from a previous study by the Department of Physics geoelectric exploration team of UNP. Resistivity is determined from an apparent resistivity measurements. Types are resistivity investigation using Vertical Electrical Sounding (VES) or depth investigation, with distinction anisotropic cross section in the vertical direction. The data inversion modeling results resistivity 1-D using IPI2WIN software obtained bedrock on the track of FE to FIS at the point of sounding 2/7 at depths > 18.3 m the resistivity is 1002 Wm, on track of UNP gate to FT at the point of sounding 2/7 at depths > 25.6 m the resistivity is 744 Wm and at the point of sounding 5/7 on the surface to a depth of 3.75 m the resistivity is 778 Wm and on track of Balai Bahasa to Al Azhar mosque at the point of sounding 7/7 at a depth of > 11.4 m the resistivity is 923 Wm. While on the track of FIK to Lab. Biology is not found bedrock. Bedrock types found are suspected Andesite which form the basis for the layer above it as Alluvium and Sands, Sandstones and Clays. Modeling results are not so good, as evidenced by the error (RMS error) more than 5%, which means the calculation data does not approach the observations data. This is due to the amount of noise during measurement that sourced from the equipment used and the environmental conditions such as there are many trees, electrical wires and the route is paved.Key words: resistivity method, modeling, inversion, VES

PENENTUAN KADAR BESI (Fe) AIR SUMUR DAN AIR PDAM DENGAN METODE SPEKTROFOTOMETRI KHAIRA, KUNTUM
Sainstek : Jurnal Sains dan Teknologi Vol 5, No 1 (2013)
Publisher : IAIN Batusangkar

The purpose of research is determine of molecule of Fe2+ from well and PDAM. This research used two sample, they are from well and PDAM. This research used spectrophotomery using 1.10 phenantroline solution. Phenantroline would change all ferrous ion to Fe2+ dissoluable. Three molecules of phenantroline joint with one molecule of Fe2+ form orange-red complex ion. Reffering to Standarization from Healthy Minister of Republic Indonesia No. 492/MENKES/PER/IV/2010, the allowable maximum ferrum concentration in the drinking water is 0,3 ppm. The experiment showed that the ferrum concentration of well were 0,08 and 0,054 g/mL and the ferrum concentration of PDAM were 0,636 mg/L, 2,004 mg/L, 1,939 mg/L, 0,226 mg/L, 0,627 mg/L and 1,003 mg/L.Key words: drinking water, molecule of Fe2+, spectrophotomery

STUDI KOPRESIPITASI Zn2+ DAN Co2+ MENGGUNAKAN Al(OH)3 SEBAGAI KOPRESIPITAN Dewata, Indang
Sainstek : Jurnal Sains dan Teknologi Vol 5, No 1 (2013)
Publisher : IAIN Batusangkar

Research of study copresipitation Zn2+ using Al(OH)3 as coprecipitant has been done. This study aims to determine the optimum conditions for coprecipitation of Zn2+ by Al(OH)3, and influence of foreign ions. This study uses variation pH about 5,0 ? 10,0 and 6,0 ? 10,0 for Co2+; variation of eluent volume about 8,0 ? 14,0; variation of concentrated HNO3 volume about 1,0 ? 5,0; and variation of concentration Cu2+ and Ni2+ about 0,8; 1,2; 1,6; 2,0 and 2,4, respectively. Measurement concentration of Zn2+ using Atomic Absorption Spectroscopy (AAS) with wavelength of 213,9 nm Zn2+for 240,7 nm for Co2+. The result showed the optimum conditions occur at pH about 8, 12 mL of eluent and 1 mL of concentrated HNO3 with the absorption capacity of 0,074 mg/g for Zn2+ and pH about 8, 12 mL of eluent and 1 mL of concentrated HNO3 with the absorption capacity of 0,0905 mg/g for Co2+. Meanwhile, the presence of foreign ions such as Cu2+ has influenced the coprecipitated Zn where concentration of the coprecipitated Zn decreased with increasing the concentration of foreign ions.Keywords: coprecipitation, coprecipitant Al(OH)3, trace metal, Zn, Co, AAS

STUDI ELEKTROKIMIA PENGARUH FILM BISMUT DALAM PENENTUAN ARSENIK SARI, MAYA; Jin, Jiye
Sainstek : Jurnal Sains dan Teknologi Vol 5, No 1 (2013)
Publisher : IAIN Batusangkar

The research objective was to determine arsenic by anodic stripping technique of differential pulse voltammetry to see the effect of the arsenic bismuth films with the potential scan direction opposite to the research that has been done by Nagaosa, et al though there are no reports on the mechanism chemical reaction between arsenic clear with movies bismuth until now. The purpose of this research is to study the effect of bismuth films in the determination of arsenic. In this study, the addition of bismuth ions with a concentration of 200 ppb. Voltammograms can be seen from quite a significant difference between the peak current generated by As (III) films coated with a non-bismuth bismuth films. Visible peak current of As (III) is higher if the addition of bismuth films. This proves the statement Nagaosa, et al who stated that there are mixed effects of bismuth in the determination of As (III) although the mechanism remains unclear.Keyword: film bismuth, arcenic, differential pulse, anodic, stripping voltammetry

INTEGER PROGRAMMING DENGAN PENDEKATAN METODE BRANCH AND BOUND NARI, NOLA
Sainstek : Jurnal Sains dan Teknologi Vol 5, No 1 (2013)
Publisher : IAIN Batusangkar

The purpose of this study was to determine the allocation of projects to be implemented by the Department of Road Infrastructure Pripinsi West Sumatra in 2005, so the cost minimum. The method used is the method of Branch And Bound together with the simplex method with a solution in the form of binary integer program .. By this method it was found that all the variables that represent each project is worth the cost of the current minimum, so that the entire project could be done with minimum total cost is Rp 17,789,289,600.00. This is in accordance with the reality on the ground that all projects can be realized by the Department of Road Infrastructure West Sumatra province.Key words: branch and bound method, simpleks method, integer biner

STUDI KOPRESIPITASI Zn2+ MENGGUNAKAN Al(OH)3 SEBAGAI KOPRESIPITAN Dewata, Indang; Nasra, Edi; Wizul, Yollafebrisa
Sainstek : Jurnal Sains dan Teknologi Vol 5, No 1 (2013)
Publisher : IAIN Batusangkar

Research of study copresipitation Zn2+ using Al(OH)3 as coprecipitant has been done. This study aims to determine the optimum conditions for coprecipitation of Zn2+ by Al(OH)3, and influence of foreign ions. This study uses variation pH about 5,0 ? 10,0; variation of eluent volume about 8,0 ? 14,0; variation of concentrated HNO3 volume about 1,0 ? 5,0; and variation of concentration Cu2+ about 0,8; 1,2; 1,6; 2,0 and 2,4. Measurement concentration of Zn2+ using Atomic Absorption Spectroscopy (AAS) with wavelength of 213,9 nm. The result showed the optimum conditions occur at pH about 8, 12 mL of eluent and 1 mL of concentrated HNO3 with the absorption capacity of 0,074 mg/g. Meanwhile, the presence of foreign ions such as Cu2+ has influenced the coprecipitated Zn where concentration of the coprecipitated Zn decreased with increasing the concentration of foreign ions.Keywords: coprecipitation, coprecipitant Al(OH)3, trace metal, Zn, AAS

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Contact Name
Marjoni Imamora

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Phone
+6282169719397

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Fakultas Tarbiyah dan Ilmu Keguruan IAIN Batusangkar Jl. Sudirman No. 137 Kuburajo Lima Kaum Batusangkar, Sumatera Barat. 27213

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Kab. tanah datar,

Sumatera barat

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