324,467 research outputs found
WATER AND SEDIMENT QUALITY ASSESSMENT OF THE LIFEBLOOD OF THRACE REGION (TURKEY): MERIC RIVER BASIN
No full textMeric River, which is the longest river in Balkans, is one of the most important aquatic ecosystems in Thrace Region of Turkey. But as many aquatic ecosystems, Meric River Basin is known to be exposed to an intensive organic and inorganic pollution by means of agricultural and industrial pressure on the system. The aim of this study was to determine the water and sediment quality of Meric River Basin by using some statistical techniques. For this purpose, water and sediment samples were collected in spring (rainy) season of 2017 from 24 stations selected on the basin. Total of 19 water quality parameters (temperature, dissolved oxygen, % oxygen saturation, pH, EC, TDS, salinity, turbidity, nitrate, nitrite, ammonium, phosphate, sulphate, floride, chloride, ORP, COD, BOD and fecal coliform) were investigated in water samples and also total of 9 inorganic pollution parameters (Cd, Pb, As, B, Cu, Zn, Cr, Ni and Se) were investigated in water and sediment samples. Cluster Analysis (CA) and Factor Analysis (FA) were applied to the results in order to evaluate the detected data effectively. According to detected data, pollution levels of the investigated rivers and lakes as follows; Ergene River > Meric River > Tunca River > Lakes of Meric Delta in general. It was also determined that organic contamination levels in water and toxic element levels in sediment of the Meric River Basin have reached to critical levels and the system is under effect of agricultural and industrial pressure.Trakya University, Turkey; Trakya University, Commission of Scientific Research Projects [2016/247]The author would like to thank for the financial and technical supports supplied by Trakya University, Turkey. This investigation has been supported by the project numbered as 2016/247 accepted by Trakya University, Commission of Scientific Research Projects
Solution structures of 2x6-meric and 4x6-meric hemocyanins of crustaceans Carcinus aestuarii, Squilla mantis and Upogebia pusilla.
No full textArthropod hemocyanins (Hcs) are a family of large, high molecular mass, extracellular oxygen transport proteins. They form oligomeric quaternary structures based on different arrangements of a basic 6 x 75 kDa hexameric unit. Their complex quaternary structures present binding sites for allosteric effectors and regulate the oxygen binding process in a cooperative manner. In order to describe the functional regulation of arthropod Hcs, a detailed description of their quaternary structure is necessary. We have utilized small angle X-ray scattering to characterize the structure of three arthropod Hcs in unperturbed conditions. Two different levels of complexity are evaluated: for the 2 x 6-meric case, we analyzed the Hcs of the portunid crab Carcinus aestuarii and stomatopod Squilla mantis, while in the case of 4 x 6-meric structures, we studied the Hc of the thalassinid shrimp Upogebia pusilla. While C aestuarii Hc presented a structure comparable to other 2 x 6-meric crustacean Hcs, S. mantis Hc shows a peculiar and quite unique arrangement of its building blocks, resembling a substructure of giant Hcs found among cheliceratans. For U. pusilla, the arrangement of its subunits is described as tetrahedral, in contrast to the more common square planar 4 x 6-meric structure found in other arthropod Hcs
Organic THMs precursors removal from surface water with low TOC and high alkalinity by enhanced coagulation
No full textTreatment of reactive dyes and textile finishing wastewater using Fenton’s oxidation for reuse
No full textCotton-supported Heterotrophic Denitrification of Nitrate Rich Drinking Water With a Sand Filtration Post-treatment
No full textSustainable wastewater management in developing countries: are constructed wetlands a feasible approach for wastewater reuse ?
No full textAn heterotrophic/autotrophic denitrification (HAD) approach for nitrate removal from drinking water
No full textInnovative heterotrophic autotrophic denitrification for drinking water: effect of ZVI on nitrate removal
No full textHeterotrophic/autotrophic denitrification (HAD) of drinking water: prospective use for permeable reactive barrier
No full textRain-flagging of the Envisat altimeter
No full textAs the goals for altimetric measurements become ever more precise, there is concern about the reliable detection and discarding of rain contaminated data. A dual-frequency rain detection technique developed for the Ku- and C-band TOPEX altimeter, is adapted for the Ku- and S-band RA-2 altimeter on Envisat. Of particular concern is the selection of a suitable threshold to minimise the quantity of good data inadvertently discarded
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