Publications by authors named "Y Ulus"
Article Synopsis
- Tree canopies contribute to increased levels of mercury and methylmercury, but little is known about how methylmercury behaves in tree foliage over time.
- In a study spanning one growing season, researchers measured total mercury and methylmercury in the leaves of five American Beech trees in North Carolina.
- The study found that while total mercury in the foliage increased linearly over time, methylmercury levels varied among trees, with two showing high initial levels that later declined before rising again towards the end of the season, indicating foliage can accumulate methylmercury despite new growth.
Wetlands are widely regarded as biogeochemical hotspots of highly toxic methylmercury (MeHg), mainly mediated by sulfate-reducing bacteria. In low-lying coastal wetlands, sea level rise, a phenomenon caused by global climate change, is slowly degrading numerous healthy freshwater forested wetlands into salt-degraded counterparts with a nickname "ghost forests", and eventually converting them to saltmarshes. However, little is known about the changes of mercury (Hg) methylation, bioaccumulation, and biomagnification along the forest-to-saltmarsh gradient.
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- Despite improvements in analytical techniques, accurately measuring dissolved organic carbon (DOC) in environmental samples remains challenging; this review aims to explore DOC's roles in water systems, identify existing problems in DOC characterization, and suggest ways to enhance analytical accuracy.
- The paper outlines DOC's ecological and engineering functions, highlighting its importance in nutrient cycling, pollutant fate, and water treatment, while also addressing major challenges like variability in DOC levels and unknown chemical structures.
- The review details DOC analysis procedures, offering insights into the sampling, isolation, storage, and analytical processes, evaluating the pros and cons of various methods and providing recommendations for better accuracy throughout these stages.
Objectives: This study aims to investigate the relationship between serum level of nesfatin-1 and fibromyalgia syndrome (FMS) clinical parameters such as pain severity, disease activity, fatigue, emotional state, and sleep quality.
Patients And Methods: Forty-six female patients with FMS (median age 40 years; range, 18 to 53 years) and 46 healthy female controls (median age 36 years; range, 19 to 52 years) were included in the study. Severity of pain, disease activity, fatigue, sleep quality, and emotional status were evaluated by visual analog scale, Fibromyalgia Impact Questionnaire, Multidimensional Assessment of Fatigue (MAF), Pittsburgh Sleep Quality Index (PSQI), Beck Depression Inventory (BDI), and Beck Anxiety Inventory (BAI), respectively.
Objectives: The aim of this study was to evaluate the relationship of illness perceptions (IPs) with demographic features, severity of pain, functional capacity, disability, depression, and quality of life in patients with chronic low back pain (CLBP).
Patients And Methods: Between January 2015 and July 2015, a total of 114 patients with non-specific CLBP (86 females, 28 males; mean age 47.1±15.