Granite Exploration by using Electrical Resistivity Imaging (ERI): A Case Study in Johor

Electrical Resistivity Imaging (ERI) is a tool used in near surface geophysical surveys by flowing an electric current through electrodes that were injected into the ground. The usage of electrical resistivity imaging (ERI) method dominated by geophysicist has increased tremendously in geotechnical engineering application owing to the efficiency and effectiveness of the method in term of time, cost and also data coverage. The survey performed with respect to the particular reference to ERI in determining the granite rock underneath the ground. There were seven (7) lines of ERI performed at the study area by using ABEM Terrameter LS 2 set of equipment based on Schlumberger protocol. Six (6) boreholes were also drilled to obtain engineering properties of rock at the study area. In order to develop the relationship between resistivity and engineering properties, a comparison between borehole field test result and the resistivity value were made. Results from the ERT indicated the presence of zones with high resistivity values identified as overburden soil, fractured granite and solid granite. The findings of this study also showed that the electrical resistivity imaging coupled with borehole drillings were applicable tools for the determination of the granite rock underneath the ground via subsurface profiles and such as depth of overburden soil and engineering properties of soil

Noninvasive genetic sampling on the rare sumatran rhinoceros (Dicerorhinus sumatrensis): Identification of the host species from the blood meal collected from the tabanid fly (Tabanidae: Haematopota sp.)

Objective:To demonstrate a noninvasive large mammalian genetic sampling method using blood meal obtained from a tabanid fly. Methods:Blood meal was recovered from the abdomen of an engorged tabanid fly(Haemotopota sp.) which was captured immediately after biting a Sumatran rhino in captivity.the blood was applied on to a Whatman FTA blood card. Subsequent laboratory work was conducted to extract,amplify and sequence the DNA from the sample. Validation was done by sampling the hair follicles and blood samples from the rhinocheros and subjecting it to the same laboratory process. Results:BLAST search and constructed phylogenetic trees confirmed the blood meal samples were indeed from rhino. Conclusions: This method could be used in the field application to noninvasively collect genetics samples. Collection of tabanids and other haematophagous artropods(e.g.mosquitoes and ticks) and other blood-sucking parasites (e.g. leeches and worms) could also provide information on vector-borne diseases

Blood meal analysis of tabanid fly after it biting the rare Sumatran rhinoceros

Objective:To demonstrate a noninvasive large mammalian genetic sampling method using blood meal obtained from a tabanid fly. Methods:Blood meal was recovered from the abdomen of an engorged tabanid fly(Haemotopota sp.) which was captured immediately after biting a Sumatran rhino in captivity.the blood was applied on to a Whatman FTA blood card. Subsequent laboratory work was conducted to extract,amplify and sequence the DNA from the sample. Validation was done by sampling the hair follicles and blood samples from the rhinocheros and subjecting it to the same laboratory process. Results:BLAST search and constructed phylogenetic trees confirmed the blood meal samples were indeed from rhino. Conclusions: This method could be used in the field application to noninvasively collect genetics samples. Collection of tabanids and other haematophagous artropods(e.g.mosquitoes and ticks) and other blood-sucking parasites (e.g. leeches and worms) could also provide information on vector-borne diseases

Granite exploration by using electrical resistivity imaging (ERI): a case study in Johor

Electrical Resistivity Imaging (ERI) is a tool used in near surface geophysical surveys by flowing an electric current through electrodes that were injected into the ground. The usage of electrical resistivity imaging (ERI) method dominated by geophysicist has increased tremendously in geotechnical engineering application owing to the efficiency and effectiveness of the method in term of time, cost and also data coverage. The survey performed with respect to the particular reference to ERI in determining the granite rock underneath the ground. There were seven (7) lines of ERI performed at the study area by using ABEM Terrameter LS 2 set of equipment based on Schlumberger protocol. Six (6) boreholes were also drilled to obtain engineering properties of rock at the study area. In order to develop the relationship between resistivity and engineering properties, a comparison between borehole field test result and the resistivity value were made. Results from the ERI indicated the presence of zones with high resistivity values identified as overburden soil, fractured granite and solid granite. The findings of this study also showed that the electrical resistivity imaging coupled with borehole drillings were applicable tools for the determination of the granite rock underneath the ground via subsurface profiles and such as depth of overburden soil and engineering properties of soil. In conclusion, ERI is a method that does not disturb the structure or the function of the soil which successfully became the best method in exploring the granite rock