Istanbul Technical University Department of Geological Engineering

Current Magazines

• [cover abstract]
  ABSTRACT: Little synthetic ponds are ubiquitous in various all-natural surroundings. Tiny impoundments increase the residence time of water, therefore increasing the prospect of retention of vitamins through biological and actual processes. We examined bacterial neighborhood framework of Lake Maslak, a tiny freshwater impoundment situated in a densely populated area. The aim of our study was to research microbial communities of this pond sediment which includes perhaps not been determined and also to elucidate the facets controlling microbial variety together with biogeochemical processes inside the pond. For these purposes, area liquid, lake bed sediments, and something core sample had been collected. Microbiological feature for the lake bed and core sediments had been determined by denaturing gradient solution electrophoresis focusing on the 16S rRNA gene. Together with the microbiological researches, physicochemical (O(2), pH, temperature) and geochemical properties associated with area (NO (3) (-), NO (2) (-), NH (4) (+), PO (4) (-), Hence (4) (2-), K(+), Mg(2+), Ca(2+)) and pore water (K(+), Mg(2+), Ca(2+)) had been determined as well as heavy metals contents (Co Cu, Fe, Zn, Pb, Cd). Eight pond sleep plus one core sediments had been additionally gathered and reviewed for hefty metals and elemental compositions. Nitrate concentration within the area water ranges from 0.27-1.8 mg/L, and ammonium (0.0-0.83 mg/L) seems to follow nitrate focus. Sulfate focus into the surface water (imply 60 mg/L) is more than those assessed in the pore liquid (mean, 37.5 mg/L). Fe, Zn, Pb, and Cd were not determined into the surface water, whereas Co had been somewhat higher in both the area and pore water. Unlike Co, Pb, Zn, and Cd are not measured when you look at the pore liquid. Lakebed and core sediments reveal significant enrichment in Pb, Zn, and Cu, suggesting anthropogenic pollution. In line with geochemical parameters, microbiological analysis shows a varied bacterial community when you look at the pond sediments and impact of anthropogenic pollution (e.g., atmospheric emission) on microbial neighborhood.

  Full-text · Article · Sep 2011 · Environmental tracking and evaluation

• [cover abstract]
  ABSTRACT: We learned the top creep over the North Anatolian Fault (NAF), the most seismically energetic structures for the east Mediterranean, by utilizing a ground-based light detection and varying (LIDAR) system at Ismetpasa and Destek areas. Aseismic surface creep was known to exist at Ismetpasa since the 1970s, nonetheless it has not been previously reported for the Destek site. Three manmade wall space throughout the fault had been supervised for 3 yrs between Summer 2007 and November 2009 utilizing LIDAR. The surveys unveiled that a significant amount of aseismic stress will be constantly circulated along these parts of the NAF: 6.8–10.0±4.0 mm/yr and 9.1–10.1±4.0 mm/yr at two websites near Ismetpasa and 6.0–7.2±4.0 mm/yr at Destek. Despite this, these fault sections are still with the capacity of producing large earthquakes since 50–70percent of this yearly slide (for example., 20–25 mm/yr) however accumulates regarding fault, as was shown by the well-known 20th century earthquake sequence of 1939–1999.

  Full-text · Article · Mar 2011 · world and Planetary Science Letters

• [Hide abstract]
  ABSTRACT: Characterization of Aksaray-Guzelyurt clays in the Central Anatolian region had been completed plus the clay minerals used in the building rocks and their particular effects had been examined. The clay samples extracted from Guzelyurt location situated into southeast of town of Aksaray were investigated employing the spectroscopic methods. The differential thermal evaluation (DTA) in addition to thermogravimetric analysis (TGA) dimensions have already been completed for determinations of thermal behaviour of clay samples. First, the Fourier Transform Infrared (FTIR) spectra associated with the standard clay minerals-"The World Source Clay Minerals" such illite (IMt-1; Silver Hill, Montana, USA), illite-smectite blended level (ISMt-1; Mancos Shale, Ord.), beidellite (SBId-1; Idoha, United States Of America), kaolinite (KGa-1; Washington Country, Georgia, American), chlorite (ripidolite, CCa-1; Flagstaff Hill, El Dorado nation, California, USA), nontronite (NAu-2; Uleynine, South Australia), montmorillonite (SCa-3; Otay, north park Country Ca, American) had been acquired. Then the spectra of anhydrite, gypsum, illite+quartz+feldspar, quartz+feldspar were recorded with the standard clays. After that, the mineral phases contained in samples obtained from Aksaray-Guzelyurt location had been identified by contrasting their particular FTIR spectra with those of the standard clay nutrients and X-ray Diffraction (XRD) habits. It was discovered that the clay samples consist of quartz, illite (T-O-T), kaolinite, amorf silica and they have T-O (Tetrahedral-Octahedral) or O-T (Octahedral-Tetrahedral) structure. The primary clay mineral within the examples is kaolinite. Clays constitute nearly all occurring nutrients that happen due to the fact alteration product of building stones. The carbonate rocks using in various buildings tend to be mainly composed of calcite. Generally, dolomite, silica and clay nutrients accompany this mineral. The clay kind and their particular faculties that lead to shortening lifetime of buildings tend to be initially analyzed then visual deteriorations occurring related to exteriors have been discussed. Typical use of the carbonate stones containing clays eg marl as creating rocks quarried from the Guzelyurt area increases these types of incidences at regional scale.

  Full-text · Article · Sep 2010 · Overseas journal of actual sciences