In this communication, we investigate optically activated delayed fluorescence (OADF) from DNA-stabilized silver nanoclusters (DNA-AgNCs) at the single molecule level, and we probe the heterogeneity in the primary fluorescence (PF) intensity, NIR induced secondary fluorescence (SF) intensity and SF/PF ratio. Our experiments reveal a heterogeneous distribution in the SF/PF ratio, indicating that engineering of DNA-AgNCs towards a high SF/PF ratio and high OADF signal for background-free imaging might be possible.
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Probing heterogeneity of NIR induced secondary fluorescence from DNA-stabilized silver nanoclusters at the single molecule level.
Phys Chem Chem Phys
June 2018
Nanoscience Center and Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen, Denmark.
In this communication, we investigate optically activated delayed fluorescence (OADF) from DNA-stabilized silver nanoclusters (DNA-AgNCs) at the single molecule level, and we probe the heterogeneity in the primary fluorescence (PF) intensity, NIR induced secondary fluorescence (SF) intensity and SF/PF ratio. Our experiments reveal a heterogeneous distribution in the SF/PF ratio, indicating that engineering of DNA-AgNCs towards a high SF/PF ratio and high OADF signal for background-free imaging might be possible.
View Article and Find Full Text PDFIndices of adiposity and thyroid hormones in euthyroid postmenopausal women.
Eur J Endocrinol
August 2015
Second Department of Obstetrics and GynecologyHormonal LaboratoryAretaieio Hospital, University of Athens, 76 Vas. Sofias Avenue, GR-11528 Athens, GreeceDepartment of TherapeuticsAlexandra Hospital, University of Athens, 80 Vas. Sofias Avenue, GR-11528 Athens, GreeceDepartment of NeurologyAiginiteion Hospital, University of Athens, 72-74 Vas. Sofias Avenue, GR-11528 Athens, Greece.
Objective: We aimed to evaluate the association between thyroid hormones and indices of obesity in a sample of euthyroid postmenopausal women.
Design: Cross-sectional study.
Methods: Serum levels of TSH, free triiodothyronine (FT3), and free thyroxine (FT4) as well as BMI and waist:hip ratio (WHR) were evaluated in 194 healthy euthyroid postmenopausal women.
Free thyroxine is an independent predictor of subcutaneous fat in euthyroid individuals.
Eur J Endocrinol
September 2009
Endocrine Unit, Department of Endocrinology and Metabolism, Evgenidion Hospital, Athens, Greece.
Objective: Thyroid function parameters have been associated with obesity, but associations with the type of adiposity have not been examined. We used ultrasound (US) to assess regional adiposity and investigated associations of thyroid function with parameters of central obesity.
Design: Cross-sectional study.
A total of 64 Rambouillet ewes was utilized in this study. Ewes were fed a 50:50 mixture of alfalfa and prairie hay ad libitum and either no concentrates (C), .4 kg concentrates .
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