Tekirdağ Yüzeysel Su Kaynakları ile Marmara Denizi’ne Nutrient Taşınımı ve Bu Yolla Oluşan Ekonomik Kayıplar

DergiPark: 245929trakyafbdTrakya Bölgesi, birim alana fazla miktarda gübre kullanılan bir bölgedir. Toprağa uygulanan gübreler, drene olarak veya erozyon yoluyla nehirlere, yeraltı sularına ve sonunda Marmara Denizine ulaşmaktadır, yeraltı suları içilemez ve pek çok nehir kullanılamaz durumdadır. Bu araştırmada, bazı kirleticilerin incelenen derelerdeki mevsimsel dağılımları ve ekonomik kayıplar analiz edilmiştir. Aylık olarak örneklenen, dere sularında, nitrat azotu ve toplam fosfor derişimlerinin eşdeğeri olan kimyasal gübre formları ve bu gübrelerin ekonomik kayıp miktarları hesaplanmıştır. Araştırmadan elde edilen sonuçlara göre, toplam 368.4 mg l nitrat azotu ve 328.4 mg l-1 toplam fosfor, araştırma alanından Marmara Denizine taşınmıştır. Bu derişimlerin eşdeğeri olan kimyasal gübre formu miktarları ise, toplam 6810.2 ton NH4NO3 yıl-1 ve 5528.9 ton TSP yıl olarak hesaplanmıştırThe region of Trakya is a place where excessive amount of fertilizer per unit area is used. Since fertilizers applied to the soil reach, either by draining or by erosion, the rivers, the ground water and finally the Sea of Marmara the ground water and most of the river waters are neither drinkable nor usable. In this study, seasonal distributions of certain pollutants in the streams and the economic losses were analyzed. The nitrate nitrogen and total phosphorus equivalent concentrations of chemical fertilizers and the economic losses for such fertilizers were calculated for the streams sampled monthly. According to the results of the study, a total of 368.4 mg l-1 nitrate nitrogen and 328.4 mg l-1 total phosphorus were carried from the study area to Marmara Sea. The chemical fertilizer quantities equivalent to those concentrations in total were 6810.2 ton NH4NOyear-1 and 5528.9 ton TSP year-

Convection and accumulation of trifluralin herbicide in the soil in field conditions

Günümüzde tarım alanlarında en önemli amaçlardan bir tanesi, artan nüfusa ve ona paralel olarak artan gıda gereksinimikarşılamaya yönelik olarak yüksek tarımsal üretimin sağlanmasıdır. Bu bağlamda, birim alandan daha fazla verim almak amacı iletarımda kullanılan birçok tarımsal girdi, tarımsal üretim sistemini olumsuz etkilemektedir. Herbisit girdisi bunların enönemlilerinden biri olup başta su ve toprak gibi doğal kaynakları kirletmesi ve topraktaki kalıntıları ile bir çok makro ve mikrocanlının yanı sıra, topraktan yıkanarak yer altı suyuna ve akarsu, göl ve deniz gibi su yüzeylerine ulaşarak yaşayan canlıları direktolarak, ya da bu canlı organizmalarda birikerek besin zincirini olumsuz etkilemektedir. Araştırma, Trakya Bölgesi Turgutbey sulamasahasında üreticilerin açtıkları kuyulardan sağlanan su ile sulama uygulaması yapılan toprakları kapsamaktadır. Sahaya aittoprakların farklı katmanlarında trifluralin herbisitinin toprakta taşınımı ve kalıntı olarak birikimi irdelenmiştir. Çalışmada, farklıorganik madde ve bünyeye sahip 16 farklı noktada ve 3 katmanda örnekleme yapılmıştır. Dört yıllık çalışmada, 2,4 (min.) ile 1200(max.) ug/L düzeyinde trifluralin kalıntı miktarları belirlenmiştir. Toprak örneklerinde profillerin üst katmanlarında trifluralinmiktarları daha yüksek olurken alt katlara inildiğinde konsantrasyonlarda düşme görülmektedir. Ayrıca ilkbaharda alınantopraklardaki trifluralin konsantrasyonlarının sonbaharda yapılan toprak örneklemelerindeki konsantrasyonlara oranla dahayüksek olduğu tespit edilmiştir.Nowadays, one of the most important purposes in agricultural areas is to provide high agricultural production in order to supply the increasing food requirement according to the increasing population. In this context, many agricultural inputs which are used in order to get more yield from unit area effect the agricultural production system negatively. Herbicide is one the most important inputs, pollutes the natural resources such as water and soil and effects the living creatures by reaching to the rivers, lakes and seas and underground waters besides several macro and micro livings or effects the food chain by cumulating in these living organisms. This research includes the soils to which the irrigation application is done by the water in the wells in Turgutbey irrigation areas in Thrace region. Convection and accumulation of trifluralin herbicide in different layers of the soil were examined. Sampling was done in 16 different points and 3 layers which had different organic matters and structure. Trifluralin residual amounts were determined in 1200 (max.) ug/L level with 2,4 (min.). The trifluralin amounts were determined to be higher in the top layers of the profiles in the soil samples but decline in the concentrations was seen in the substratum. Besides, the trifluralin concentrations in the soils taken in spring were determined to be higher than the concentrations in the soil samples in autumn

Osteosarcoma in neonate with rare liver metastasis and abdominal lymphadenopathy

In this study, we report an extremely rare case of osteosarcoma in neonate with rarely metastasis and abdominal lymphadenopathy. The patient appeared to have progressive swelling of the distal right femur. Magnetic Resonance Imaging (MRI) of the right thigh revealed an eccentric lesion arising from the right femur. Computed Tomography (CT) of the thorax and abdomen showed liver metastasis and abdominal lymphadenopathy without lung involvement. It was confirmed to be osteosarcoma with focal rhabdoid features on histopatholigical examination

Measurement of the top quark forward-backward production asymmetry and the anomalous chromoelectric and chromomagnetic moments in pp collisions at √s = 13 TeV

Abstract The parton-level top quark (t) forward-backward asymmetry and the anomalous chromoelectric (d̂ t) and chromomagnetic (μ̂ t) moments have been measured using LHC pp collisions at a center-of-mass energy of 13 TeV, collected in the CMS detector in a data sample corresponding to an integrated luminosity of 35.9 fb−1. The linearized variable AFB(1) is used to approximate the asymmetry. Candidate t t ¯ events decaying to a muon or electron and jets in final states with low and high Lorentz boosts are selected and reconstructed using a fit of the kinematic distributions of the decay products to those expected for t t ¯ final states. The values found for the parameters are AFB(1)=0.048−0.087+0.095(stat)−0.029+0.020(syst),μ̂t=−0.024−0.009+0.013(stat)−0.011+0.016(syst), and a limit is placed on the magnitude of | d̂ t| < 0.03 at 95% confidence level. [Figure not available: see fulltext.

Measurement of t(t)over-bar normalised multi-differential cross sections in pp collisions at root s=13 TeV, and simultaneous determination of the strong coupling strength, top quark pole mass, and parton distribution functions

Peer reviewe

An embedding technique to determine ττ backgrounds in proton-proton collision data

An embedding technique is presented to estimate standard model tau tau backgrounds from data with minimal simulation input. In the data, the muons are removed from reconstructed mu mu events and replaced with simulated tau leptons with the same kinematic properties. In this way, a set of hybrid events is obtained that does not rely on simulation except for the decay of the tau leptons. The challenges in describing the underlying event or the production of associated jets in the simulation are avoided. The technique described in this paper was developed for CMS. Its validation and the inherent uncertainties are also discussed. The demonstration of the performance of the technique is based on a sample of proton-proton collisions collected by CMS in 2017 at root s = 13 TeV corresponding to an integrated luminosity of 41.5 fb(-1).Peer reviewe

MUSiC : a model-unspecific search for new physics in proton-proton collisions at root s=13TeV

Results of the Model Unspecific Search in CMS (MUSiC), using proton-proton collision data recorded at the LHC at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 35.9 fb(-1), are presented. The MUSiC analysis searches for anomalies that could be signatures of physics beyond the standard model. The analysis is based on the comparison of observed data with the standard model prediction, as determined from simulation, in several hundred final states and multiple kinematic distributions. Events containing at least one electron or muon are classified based on their final state topology, and an automated search algorithm surveys the observed data for deviations from the prediction. The sensitivity of the search is validated using multiple methods. No significant deviations from the predictions have been observed. For a wide range of final state topologies, agreement is found between the data and the standard model simulation. This analysis complements dedicated search analyses by significantly expanding the range of final states covered using a model independent approach with the largest data set to date to probe phase space regions beyond the reach of previous general searches.Peer reviewe

Search for new particles in events with energetic jets and large missing transverse momentum in proton-proton collisions at root s=13 TeV

A search is presented for new particles produced at the LHC in proton-proton collisions at root s = 13 TeV, using events with energetic jets and large missing transverse momentum. The analysis is based on a data sample corresponding to an integrated luminosity of 101 fb(-1), collected in 2017-2018 with the CMS detector. Machine learning techniques are used to define separate categories for events with narrow jets from initial-state radiation and events with large-radius jets consistent with a hadronic decay of a W or Z boson. A statistical combination is made with an earlier search based on a data sample of 36 fb(-1), collected in 2016. No significant excess of events is observed with respect to the standard model background expectation determined from control samples in data. The results are interpreted in terms of limits on the branching fraction of an invisible decay of the Higgs boson, as well as constraints on simplified models of dark matter, on first-generation scalar leptoquarks decaying to quarks and neutrinos, and on models with large extra dimensions. Several of the new limits, specifically for spin-1 dark matter mediators, pseudoscalar mediators, colored mediators, and leptoquarks, are the most restrictive to date.Peer reviewe

Measurement of prompt open-charm production cross sections in proton-proton collisions at root s=13 TeV

The production cross sections for prompt open-charm mesons in proton-proton collisions at a center-of-mass energy of 13TeV are reported. The measurement is performed using a data sample collected by the CMS experiment corresponding to an integrated luminosity of 29 nb(-1). The differential production cross sections of the D*(+/-), D-+/-, and D-0 ((D) over bar (0)) mesons are presented in ranges of transverse momentum and pseudorapidity 4 < p(T) < 100 GeV and vertical bar eta vertical bar < 2.1, respectively. The results are compared to several theoretical calculations and to previous measurements.Peer reviewe

Combined searches for the production of supersymmetric top quark partners in proton-proton collisions at root s=13 TeV

A combination of searches for top squark pair production using proton-proton collision data at a center-of-mass energy of 13 TeV at the CERN LHC, corresponding to an integrated luminosity of 137 fb(-1) collected by the CMS experiment, is presented. Signatures with at least 2 jets and large missing transverse momentum are categorized into events with 0, 1, or 2 leptons. New results for regions of parameter space where the kinematical properties of top squark pair production and top quark pair production are very similar are presented. Depending on themodel, the combined result excludes a top squarkmass up to 1325 GeV for amassless neutralino, and a neutralinomass up to 700 GeV for a top squarkmass of 1150 GeV. Top squarks with masses from 145 to 295 GeV, for neutralino masses from 0 to 100 GeV, with a mass difference between the top squark and the neutralino in a window of 30 GeV around the mass of the top quark, are excluded for the first time with CMS data. The results of theses searches are also interpreted in an alternative signal model of dark matter production via a spin-0 mediator in association with a top quark pair. Upper limits are set on the cross section for mediator particle masses of up to 420 GeV