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Pillar of Physics: Jurnal Berkala Ilmiah Fisika
Published by Universitas Negeri Padang
ISSN : 23379030     EISSN : 26852608     DOI : http://dx.doi.org/10.24036/10741171074
Core Subject : Science,
Earth & Planetary Sciences Materials Science & Nanotechnology Physics
This journal publishes original articles on the latest issues and trends occurring internationally in: 1 Geophysics, 2 Electronics and Instrumentation, 3 Material Physics, (4) Computational Physics. Other topics are related to physics are most welcome.
Arjuna Subject : Fisika dan Astronomi - Fisika dan Astronomi (Lain-Lain)
Articles 16 Documents
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Search results for , issue "Vol 1 (2013)" : 16 Documents clear
Analisis jenis mineral magnetik dari polutan kendaraan bermotor menggunakan metode Isothermal Remanent Magnetization (IRM) di Kota Padang (Analysis of magnetic mineral types from motorized vehicle pollutants using the Isothermal Remanent Magnetization (IRM) method in Padang City) Pramita Syafrina; - Mahrizal; Harman Amir
PILLAR OF PHYSICS Vol 1 (2013)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (466.688 KB) | DOI: 10.24036/393171074

Abstract

Polution is big problem in many city. Iron-oksida is very small and dangeraous for healty, so important to measure who give information about magnetic field. The source of polution are mount eruption, forest fire and  motor vehicle. In this eksperiment we studying about kind polution from motor vehicle. The kind polutan of vehicles was know with Isothermal Remanent Magnetization (IRM) method. In this eksperiment 93 sample, 45 top soil sample, 40 wood sample and 8 for leaf sample. The result of data analysis indication that intensity magnetization of top soil is 10.24 to 11.974.558 mA/m for wood sample is 0,22 to 7.186,20 mA/m and for leaf 0.33 to 900.31 mA/m. The analysis for saturation kurva of IRM for samples is magnetite (Fe3O4) because out field ≤ 300 mT.  Keywords: Isothermal Remanent Magnetization (IRM), magnetite
Penentuan jenis mineral magnetik Guano dari Gua Solek dan Gua Rantai Kecamatan Lareh Sago Halaban Kabupaten Lima Puluh Kota menggunakan metode X-Ray Diffraction (Determination of the magnetic mineral type of Guano from Solek Cave and Chain Caves, Lareh Sago Halaban District, Lima Puluh Kota, using the X-Ray Diffraction method) Dessupri Niarti; Hamdi Rifai; Fatni Mufit
PILLAR OF PHYSICS Vol 1 (2013)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (853.631 KB) | DOI: 10.24036/502171074

Abstract

ABSTRACTFrom the result measurement of guano susceptibility magnetic, was found in Solek and Rantai cave indicate magnetic mineral. But the kinds of magnetic mineral it’s don’t know. The kinds of magnetic mineral consist of iron oxide and sulfide oxide. In this research will be determinate the kinds of magnetic mineral which from iron oxide use x-ray diffraction method. The guano which determinated from the kinds of magnetic mineral before extraction use strong magnet. Extraction process have function for desepared magnetic mineral and nonmagnetic mineral. The result from the extraction like smooth magnetic mineral and then will be measure use x-ray diffractometer. Based on the measure process with x-ray diffraction, know the kinds of magnetic mineral which indicate in guano of Solek and Rantai Cave at Lareh Sago Halaban District Lima Puluh Kota Regency, West Sumatera the most kind of mineral was magnetite 34). Then we also found another magnetic minerals such as hematite 23).Keywords: Guano, mineral magnetic properties, x-ray diffraction (XRD), iron oxide, sulfide oxide
Kajian sifat konduktansi membran kitosan pada berbagai variasi waktu perendaman dalam larutan Pb (Study of the conductance properties of chitosan membranes at various immersion times in Pb solution) Mella Roza; - Gusnedi; - Ratnawulan
PILLAR OF PHYSICS Vol 1 (2013)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (442.159 KB) | DOI: 10.24036/723171074

Abstract

Chitosan membrane is capable of being used as adsorbent adsorption of metal ions Pb. Assessment of the electrical properties of the chitosan membrane is one see references in the membrane as ability adorpsi metal ion weight. The purpose of this study to determine the nature of the conductance of chitosan membranes useful to look at the ability of the membrane chitosan as the adsorption of metal ions Pb. This research is experimental research with samples of chitosan membranes were soaked in a solution of Pb metal. The time variation of soaking the membrane is 0.5 hours, 1 hour, 1.5 hours, 2 hours, 2.5 hours, 3 hours and without soaking. The measurement results for the effect of soaking variation time chitosan membrane. Pb metal in solution obtained current-voltage characteristics of the membrane in the solution is linear, the longer soaking in a solution of Pb metal, the greater the current flow. The longer the time soaking in a solution of Pb chitosan membrane, then the greater the value of the conductance. Keywords : Chitosan, Membrane, Adsorption, Conductance, Metal Pb
Uji kualitas telur ayam ras terhadap lamanya penyimpanan berdasarkan sifat listrik (Quality test of eggs on the length of storage based on electrical properties) Dela Prawita Mulza; - Ratnawulan; - Gusnedi
PILLAR OF PHYSICS Vol 1 (2013)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (483.432 KB) | DOI: 10.24036/548171074

Abstract

ABSTRACT Many people like eggs because the price is cheap eggs also have high nutritional value, but not many know the influence of duration of storage on the quality of eggs. The purpose of this study was to determine the value of capacitance and electrical conductivity of the white and yellow eggs are stored in the refrigerator and the room is open for 30 days. Measurement of capacitance using a parallel plate capacitor chip connected to the LCR meter using a frequency of 1 KHz, 2 KHz, 3 KHz, 4 KHz and 5 KHz, while the value of measuring the electrical conductivity of the white and the yolk are used konduktivity meters. The results obtained that the duration of the storage effect on the quality of eggs. Capacitance values of the white and the yolk are stored impaired during storage, as well as the capacitance value for the eggs stored in the refrigerator, but do not drop too much and tend to be stable, the frequency affects the capacitance value the lower the frequency the greater the capacitance value obtained . Value conductivity values also decreased during storage, the decline is evident in storage 26 days to 30 days, the eggs conductivity values stored in the refrigerator also decreased but the values obtained stable.Keywords: eggs, white and yellow eggs, capacitance, conductivity.
Estimasi kedalaman batuan dasar menggunakan metoda geolistrik tahanan jenis konfigurasi dipole-dipole di Universitas Negeri Padang Kampus Air Tawar (The estimation of bedrock depth using the geoelectric resistivity method of dipole-dipole configuration at the Universitas Negeri Padang Air Tawar) Media Febrina; - Akmam; Fatni Mufit
PILLAR OF PHYSICS Vol 1 (2013)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (815.085 KB) | DOI: 10.24036/398171074

Abstract

Estimation of basement rocks depth has been done in Padang State University, Air Tawar campus. The research that uses Dipole-dipole resistivity geoelectrical method was aimed to determine the depth, resistivity value and the kinds of basement rocks. Data were collected by Ares Multielectrode in 4 lines. Processing of data was done using Res2dinv software with Robust Constraint inversion and it results 2D model of earth’s surface that consists of depth and resistivity value. The result of this research shows that there are basement rocks around sounding point 00053’44,0”S and 100020’79,8”E in 1st line and sounding point 00053’53,1”S and 100021’02,8”E in 2nd line at depth of more than 25,2 m with resistivity value 513 – 622 Ωm and 632 – 2150 Ωm. Basement rocks are also found in 3rd line around sounding point 00053’48,9”S dan 100020’50,6”E at depth of more than 21,85 m with resistivity value 596,5 – 734 Ωm, while 4th line at sounding point 00053’55,7”S and 100021’02,3”E did not find basement rocks. Possibility of basement rocks in 4th line are at depth of more than 29,5 m. Basement rocks that are found in this research is interpreted as Andesite. Information about basement rocks can be used for construction planning in Padang State University, Air Tawar campus. Keywords: basement rocks, resistivity geoelectrical method, Dipole-dipole, Padang State University
Proses pembentukan feofotin daun suji sebagai bahan aktif photosensitizer akibat pemberian variasi suhu (The process of forming suji leaves feofotin as an active ingredient in the photosensitizer due to temperature variations) Ari Arfandi; - Ratnawulan; Yenni Darvina
PILLAR OF PHYSICS Vol 1 (2013)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (527.329 KB) | DOI: 10.24036/512171074

Abstract

ABSTRACTCancer is one kind of disease that has difficulties to treat, can be cured by using drugs which derived from natural materials in Indonesia. This treatment know a cancer treatment that uses three important factors such as the photosensitizer, oxygen and light, whereas this cancer therapy called photodynamic therapy (TFD). Photosensitizer which is required can be obtained from the suji leaves (Pleomele angusti-folia NE Brown) that were heated. The purpose of this researchs determined the content amount of chlorophyll content that suji leaves before it was heated, and knew the maximum temperature required to produce feofitin with maximum absorbance value moreover, determined purpose of this research the correlation feofitin absorbance value and the number of chlorophyll content in suji leaves after heating process. Base heating process on the research conducted, the amount of chlorophyll content which in suji leaves have heating process is 11,26453 μg / ml, in addition the maximum absorbance value feofitin on process at 900C with a maximum absorbance value is 1,90130 μg / ml. moreover a correlation between the total value absorbance with the amount of content chlorophyll in the suji leaves, however the relationship is not continuous. Keywords: suji leaves, feofitin, photosensitizer

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