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All Journal Physics Student Journal Jurnal EECCIS Journal of Environmental Engineering and Sustainable Technology Erudio: Journal of Educational Innovation Natural B Jurnal Penelitian Pendidikan IPA (JPPIPA)

Didik Rahadi Santoso

Jurusan Fisika Fakultas MIPA Universitas Brawijaya

Author-ID : 370869

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Decision Sciences, Operations Research & Management Education Energy Engineering Environmental Science Materials Science & Nanotechnology Mechanical Engineering Physics

Published : 14 Documents Claim Missing Document

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Articles

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Electrical Impedance Value Analysis on Formalinized Tilapia Fish Meat Putri, Rizka Rahmatie Agusta; Widodo, Chomsin Sulistya; Santoso, Didik Rahadi
Natural B, Journal of Health and Environmental Sciences Vol 3, No 4 (2016)
Publisher : Natural B, Journal of Health and Environmental Sciences

Electrical impedance can be used as a non-destructive method to determine the bio-electrical characteristics on biological materials. Analysis of the electrical impedance value by using an electrode needle method has been applied to the tilapia flesh which aims to determine the bio-electrical characteristics on tilapia flesh, and determine the effect of formalin on it. The measurements were carried out to compare the characteristics of bio-electrical characteristics of the fresh tilapia flesh, the tilapia flesh soaked in formalin, and the one that was lay without any preservation treatment at a 10 Hz - 200 kHz frequency. The result shows that the impedance value characteristics of the fresh tilapia flesh decreased as long as the increase of frequency. Both the preserved and the rotten tilapia flesh have the decreased impedance value. The concentration of formalin immersion is directly proportional with the value of electrical impedance.Â Â

2D Imaging Technique Electrical Impedance Distribution on Liquid with Paired Method and Using EIDORS Software Ahmad Zarkasi; Abdurrouf Abdurrouf; Didik Rahadi Santoso
Natural B, Journal of Health and Environmental Sciences Vol 4, No 1 (2017)
Publisher : Natural B, Journal of Health and Environmental Sciences

This paper discusses the 2D imaging technique of the electrical impedance distribution in the liquid by using the principles of Electrical Impedance Tomography (EIT). A tomographic technique used in the imaging process is a adjacent or neighbor method, with input data obtained from measurements of the electrical potential at the boundary measuring object. Measurement data is reconstructed using open source software, i.e. EIDORS, which in image reconstruction using the principle of Finite Element Method (FEM). As a comparison on the results of image reconstruction by EIDORS, here used Boundary Data Simulation (BDS) were obtained from the same measurement data. Based on the results of the 2D images that have been obtained, it is evident that the techniques and imaging methods that have been used are able to show the distribution of electrical impedance value of the measuring object and have a good agreement with the results of BDS.

Radiation Effects on Decreased Estrogen with Isoflavone Consumption to Prevent Early Menopause in Radiation Therapy Yeni Cahyati; Didik Rahadi Santoso; Unggul P Juswono
Natural B, Journal of Health and Environmental Sciences Vol 2, No 2 (2013)
Publisher : Natural B, Journal of Health and Environmental Sciences

Radiation effect is one of which is the reduction in estrogen. Gamma rays are ionizing radiation that can lead to cell damage due to free radicals produced when the radiation interacts with cells. The level of cell damage can be minimized by antioxidants. Antioxidants used is the isoflavones of soy milk, so it can be know the effects of radiation on the decline in estrogen that accompanied the consumption of isoflavones to prevent early menopause in radiation therapy.Radiation exposure are given fractionally. The dose was 1,5 Gy in once exposure and given every 3 days up to a maximum dose of the treatment groups. Consumption of soy milk to the mice done orally. Blood was drawn and serum was made. Serum estrogen levels will be tested by using ELISA.The results showed that the ovarium disfunction and stress experienced by mice (Mus musculus) caused by radiation exposure. Maximum results in the consumption of isoflavones on estrogen levels the subject to radiation exposure is 44 mg/day and 131 mg/day of soy milk. This isoflavone dose increase in estrogen levels maximumly. The increase was the response given by the body's immune system of mice due to start reacting and isoflavones are phytoestrogens.

Analysis of Experimental Results Measurement of Electric Impedance Value on Liquid with Injection Flow on Parallel Plate Gianita Anastasia Salamena; Abdurrouf Abdurrouf; Didik Rahadi Santoso
Natural B, Journal of Health and Environmental Sciences Vol 4, No 1 (2017)
Publisher : Natural B, Journal of Health and Environmental Sciences

This paper discusses the results of experimental measurement of the electrical impedance of liquids in parallel and perpendicular position to the direction of current injection. Experiments carried out on three different types of liquid i.e. distilled water, mineral water, and milk. Each liquid is placed in a container box with volume of 2,5cm x 2,5cm x 2,5cm. The electrode is located in the middle of the upright side of the container, forming two pairs of parallel plates, where one pair of parallel plate will serve as the current electrode. Current signal frequency range used in this experiment is 1Hz-500Hz. Experimental results obtained some things such as each liquid has a different electrical characteristic, distilled water has much larger electrical impedance compared to the mineral water and milk. Area of the electrode affects the measured impedance values on each liquid; the larger area of the electrode will decrease impedance value. The position of the electrode against the direction of flow injection showed the difference in impedance values measured, where the impedance measured at liquid injection electrode direct current is greater than the value of the impedance measured at liquid electrodes perpendicular injection current.

The Relationship Between Honey's Floral Origins and The Electrical Impedance of Honey Variants Vivien Dwi Indriyani; Didik Rahadi Santoso; Chomsin Sulistya Widodo
Natural B, Journal of Health and Environmental Sciences Vol 4, No 4 (2018)
Publisher : Natural B, Journal of Health and Environmental Sciences

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One of the factors that influence the composition of honey is the plant that became the source of nectar. Honey derived from one plant species has a different composition with honey from other plant species. This study aims to analyze the effect of the origin of honey flower on the value of electrical impedance by using impedance spectroscopy and to analyze the relationship between ash content and electrical impedance in honey. This study used four gold needle electrodes and a set of PicoScope 5244B tools to measure the value of honey impedance. Measurements are made by injecting a current of 10 μA and using frequencies 1 Hz to 2 MHz. This study also measured ash content in honey. The sample used is kelengkeng, kaliandra, randu, coffee, and rubber honey. The results showed that the origin of honey flower affects the value of electrical impedance. The relationship between impedance and ash content is the smaller the ash content in honey the impedance value is greater.

Analysis of Voltage Difference Characteristics of Albumin Membranes and Vitelin Membranes of Chicken Eggs through Diazinon Effects Wira Dian Jauharah; Didik Rahadi Santoso; Unggul P. Juswono
Natural B, Journal of Health and Environmental Sciences Vol 4, No 2 (2017)
Publisher : Natural B, Journal of Health and Environmental Sciences

Cells are the most important structural and functional part of any organism. Cells are protected by cell membranes that envelop cells, and separate cells with their environment. The effectiveness of the work of a cell membrane can be disrupted for various reasons, one of which is pesticide contamination. Pesticides in cells can damage cell metabolism or cell membrane permeability. Therefore, this study aims to determine how big the effect of diazinon insecticides on the characteristics of different potential membrane vitelin and membrane albumin chicken egg cells. Measurements were made using the microelectrode connected with the picoscope 5000 series, then the data appears displayed through the PC. The results of membrane potential measurements showed that the greater the concentration of insecticide given, the potential value of chicken egg membrane increased. Potential Differential Values Membrane of eggs with different concentrations ranged in -145 mV - 249 mV on vitelin membrane, and -142,5 mV - 242,5 mV on albumin membrane

Analysis of Potential Differential Characteristics of Albumin Membranes and Vitelin Membranes Quail Eggs (Cortunix cortunix) Due to Hydrogen Peroxide Fluid Ummu Hidayati Mardiyah; Didik Rahadi Santoso; Unggul Pundjung Juswono
Natural B, Journal of Health and Environmental Sciences Vol 4, No 1 (2017)
Publisher : Natural B, Journal of Health and Environmental Sciences

The research of analysis the potential difference characteristic of albumin and vitelline membranes quail egg (Coturnix Coturnix) due to contaminated by hydrogen peroxide (H 2 O 2 ) was conducted to determine the effect of hydrogen peroxide (toxic) against the resistance of a cell. Hydrogen peroxide (H 2 O 2 ) is one group of reactive oxygen species (ROS) that can damage lipids, proteins and nucleic acids because they can diffuseion freely passed by bilayer membrane, so that the hydrogen peroxide concentration needs to be controlled. The resistance of a cell can be determined from changes in the value of the measured membrane potential. The method used in the research applied a microelectrode connected with unity gain differential amplifier and PicoScope. The measurement results show that there is a change the potential difference at the albumin membrane and vitellin membrane of quail egg due to contaminated hydrogen peroxide (H 2 O 2 ). The highest value of the membrane potential difference in the concentration 0 ppm at the albumin membrane is (-144 ± 2 mV) and the vitelline membrane is (-172 ± 3 mV), while the lowest value of the potential difference in the concentration 4000 ppm is (-8 ± 2 mV) at the albumin membrane and (-18 ± 1 mV) at the vitellin membrane.

Design of CO2 Gas Measuring System Arinto Yudi Ponco Wardoyo; Setyawan Purnomo Sakti; Didik Rahadi Santoso
Natural B, Journal of Health and Environmental Sciences Vol 1, No 1 (2011)
Publisher : Natural B, Journal of Health and Environmental Sciences

Carbon dioxide (CO2) has been known well as a contributor gas for the global warming. Regarding the impact, the measurement of the CO2concentration in the air is very important for the assessment. This paper presents the design of a CO2 instrument built by using the components that are available in the market. The instrument contains a CO2 sensor, an interfacing system, and a computer. The test showed that the instrument worked well. It could be used to measure a CO2 concentration on line and in real time.

Co-Authors abdurrouf Abdurrouf Ahmad Nadhir Ahmad Zarkasi Amalia Cemara Nuraidha, Amalia Cemara Arinto Yudi Ponco Wardoyo Chomsin Sulistya Widodo Chomsin Sulistya Widodo Chomsin Sulistya Widodo Ferhiyan Nabila Gancang Saroja Gianita Anastasia Salamena Jacob Jonas Rikumahu Moch. Dhofir Muwardi Sutasoma Nur Aini Gama Lestari Rini Nur Hasanah Rizka Rahmatie Agusta Putri Setyawan P. Sakti Setyawan Purnomo Sakti Sukir Maryanto Ummu Hidayati Mardiyah Unggul P Juswono Unggul P. Juswono Unggul Pundjung Juswono Vivien Dwi Indriyani Wira Dian Jauharah Yeni Cahyati

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