1,360 research outputs found
SCHIZOGONY IN DIZERINA-ANATOLICA MERIC
No full textFinding of the microspheric individual of Dizerina anatolica Meric containing 6 macrospheric embryos clearly indicates the presence of the schizogonic type reproduction in the Lepidorbitoididae. Location of the haploid macrospheric embryos within the test indicates the generation of these embryos in the rotaloid periembryonic part, and later, their movements toward the periphery of the test
Medicinal Plants Used in Meric Town from Turkey
No full text3rd Mediterranean Symposium on Medicinal and Aromatic Plants (MESMAP) -- APR 13-16, 2017 -- Girne, CYPRUSBackground: There are a few studies on medical plants used in the Trakya region of Turkey ( Havsa, Lalapasa, Uzunkopru, Ipsala, Enez, Kirklareli). However, there has been no research study performed investigating the preparation and medicinal uses of wild plants in Meric town. Aim: The aim of this study is to determine the parts of locally growing medicinal plants used by local people in Meric town and the purpose of their use. Methods: In this study, 16 villages in Meric town (Edirne province, Turkey) were visited, and interviews were performed with 38 persons in total. Results: As result of the study, 24 plant taxa in 19 families were recorded as medicinal plants used by local people. Conclusion: These traditional medicinal plants have been mostly used for the treatment of diabetes, stomach ailments, hemorrhoids, rheumatism and asthma.Trakya University [TUBAP 2013/22]The author would like to thank to all the villagers of Meric town who collaborated in the realization of this study. This study was supported by The Scientific Research Fund of Trakya University (Project no. TUBAP 2013/22)
The molecular heterogeneity of hemocyanin: structural and functional properties of the 4x6-meric protein of Crustacea.
No full textThe structural properties of the hemocyanin isolated from the Mediterranean mud shrimp, Upogebia pusilla (Decapoda: Thalassinidea), were investigated. Our intent was to make use of the U. pusilla case to perform a structural comparison between crustacean and chelicerate 4 x 6-meric hemocyanins. The thalassinidean hemocyanin appears similar in size but different in structural organization compared to the chelicerate 4 x 6-mer. Ultracentrifiage analyses on the purified protein revealed a sedimentation coefficient of 39S, typical of 4 x 6 hemocyanins. Electron micrographs are in agreement with a model in which four 2 x 6-meric building blocks are arranged in a tetrahedron-like quaternary structure and not in the quasi-square-planar orientation characteristic of the chelicerate protein. Size-exclusion chromatography-fast protein chromatography analysis showed elevated instability of the protein in absence of divalent ions or at pH values higher than 8.0. This analysis also shows that the dissociation of the U. pusilla 4 x 6-meric hemocyanin into hexamers occurs without any intermediate 2 x 6-meric state, in contrast with the dissociation profile of the chelicerate protein exhibiting several dissociation intermediates. The oxygen-binding properties of U. pusilla hemocyanin were studied to disclose possible effects by the typical allosteric effectors that modulate the functional properties of crustacean hemocyanin. A marked Bohr and lactate effect, but no significant influence of urate, on the oxygen affinity of U. pusilla hernocyanin were 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
The Metadata Education and Research Information Commons (MERIC): A Collaborative Teaching and Research Initiative
No full textArticle dicsussing the Metadata Education and Research Information Commons (MERIC), a collaborative teaching and research initiative
Generation of 2D flood inundation maps of Meric and Tunca Rivers passing through Edirne city center
No full textNatural disasters can be defined as hazardous and usually large scale natural incidents that may cause loss of lifes and property and that occur mainly or completely out of human control. Due to climatic changes draughts are being experienced in various parts of the world in the recent years. Floods are also observed to take place more frequently and severely in some regions. As it is reported by many scientific studies, flood modeling can only be possible through the designation of flood risk management strategies and the determination of the dynamic behaviors of rivers. In this context, the city of Edirne located downstream of Meric River Basin, which runs through Turkish, Bulgarian and Greek soils, is frequently exposed to flooding. The majority of the currents that cause this take place within the Bulgarian borders, which covers 66% of the basin. This part of Meric River Basin has a mountainous geography, it has a rather high average slope of 12.5% within Bulgarian lands, while in Edirne it is quite low with a bottom slope of 0,00036. In the present study, 2D flood modeling of the Meric and Tunca Rivers that passes through Edirne city center were made and flood inundation maps were generated. With the analysis of the results obtained from flood inundation maps, a drainage channel capable of discharging flood rates that exceed the maximum rate Meric River main bed can accommodate was designed, and the downstream conditions of the channel were evaluated
Pathway modeling: from gene expression to pathway dynamics
No full textBiological pathways represent a critical level of biological organization and understanding of biochemical pathways is identified as key to future advances in biological sciences (Schaefer, 2004). The overall goal of this thesis is to develop a pathway based approach that integrates different aspects of biological pathways, specifically the structure and the dynamics of a pathway in order to characterize cells’ behavior. Our objectives are to asses structural and functional cross-species comparison of pathways (Chapter 2), to formulate a reliable pathway activity metric based on gene expression data (Chapter 3), to demonstrate that our pathway activity formulation can predict the underlying dynamics (Chapter 4) and finally to demonstrate that the pathway activity formulation can identify cell’s response to a stimulant (Chapter 5). Chapter 3-5 present how a significant pathway can be identified. Then, cross-species comparison of pathways (Chapter 2) can be used. Note that we could have Chapter 2 and Shapter 5 swapped for a more fluent flow. Neverthless, we present the chapters in this order for a better read. In Chapter 2, we propose an improvement of the reaction alignment method, emerged as the most successful pathway comparison method, by accounting for sequence similarity in addition to reaction alignment method. Using nine species, including human and some model organisms and test species, we evaluate the standard and improved comparison methods by analyzing glycolysis and citrate cycle pathways conservation. In addition, we demonstrate how organism comparison can be conducted by accounting for the cumulative information retrieved from nine pathways in central metabolism as well as a more complete study involving 36 pathways common in all nine species. In Chapter 3, we explore an extension of the pathway activity methodology which entails singular value decomposition (SVD) of the expression data of the genes constituting a given pathway. We show that pathway analysis enhances our ability to detect relevant changes in pathway activity using synthetic data. In addition, we illustrate that pathway activity formulation should be coupled with a significance analysis to distinguish significant information from random deviations.In Chapter 4, we perform an unsupervised pathway level analysis, based on the formulation presented in Chapter 3, on a rich time series of transcriptional profiling in rat liver. The over-represented five specific patterns of pathway activity levels, which cannot be explained by random events, exhibit circadian rhythms. The identification of the circadian signatures at the pathway level identify pathways related to energy metabolism, amino acid metabolism, lipid metabolism and DNA replication and protein synthesis, which are biologically relevant in rat liver. In Chapter 5, we demonstrate that our pathway activity formulation enables us to detect relevant changes in pathways due to in utero di-butyl-phthalate (DBP) exposure. Our findings suggest that the pathways that produce precursors to cholesterol synthesis exhibit more significant change compared to the rest of the affected pathways. In addition, pathway activity levels of certain biological functions accompany testosterone decrease, which is the critical event for male reproductive developmental effects of DBP, such as steroid hormone metabolism and biosynthesis of steroids.Ph.D.Includes bibliographical referencesIncludes vitaby Ayse Meric Ovaci
Rain-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
Energy-Efficiency Tuning of a Lattice Boltzmann Simulation Using MERIC
No full textEnergy-efficiency is already of paramount importance for High Performance Computing (HPC) systems operation, and tools to monitor power usage and tune relevant hardware parameters are already available and in use at major supercomputing centres. On the other hand, HPC application developers and users still usually focus just on performance, even if they will probably be soon required to look also at the energy-efficiency of their jobs. Only few software tools allow to energy-profile a generic application, and even less are able to tune energy-related hardware parameters from the application itself. In this work we use the MERIC library and the RADAR analyzer, developed within the EU READEX project, to profile and tune for efficiency the execution parameters of a real-life Lattice Boltzmann code. Profiling methodology and details are described, and results are presented and compared with the ones measured in a previous work using different methodologies and tools
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