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All Journal Journal of Enviromental Engineering and Sustainable Technology Natural B
Didik Rahadi Santoso
Brawijaya University
Environmental Science

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IDENTIFICATION OF KAWI-SONGGORITI GEOTHERMAL PROSPECTS BASED ON FAULT AND FRACTURE DENSITY (FFD) Nur Aini Gama Lestari; Sukir Maryanto; Didik Rahadi Santoso
Journal of Environmental Engineering and Sustainable Technology Vol 7, No 2 (2020)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jeest.2020.007.02.2

Abstract

The aim of this research is to identify the surface structures of geothermal area in Kawi-Songgoriti based on lineament density and surface manifestation. The lineament density is processed by using satellite image as the input data. The surface structures were analyzed through the density of lineaments on the surface with FFD method. The lineaments are assumed associated with fractures or faults found in geothermal areas those are generally covered by surface manifestation which are hard to be identified. These faults and fractures were assumed as weak line that act as fluid thermal movement, thereby it can be used as guidance for the location of permeable area or a reservoir.  As a result, the high lineament density can be found in Kawi thus assumed as the control of Songgoriti manifestation.
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (257.875 KB)

Abstract

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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (196.209 KB) | DOI: 10.21776/ub.natural-b.2017.004.02.2

Abstract

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 
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (62.105 KB) | DOI: 10.21776/ub.natural-b.2011.001.01.7

Abstract

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 Arinto Yudi Ponco Wardoyo Chomsin Sulistya Widodo Nur Aini Gama Lestari Setyawan Purnomo Sakti Sukir Maryanto Unggul P. Juswono Vivien Dwi Indriyani Wira Dian Jauharah