Chitosan functionalized gold-nickel bimetallic magnetic nanomachines for motion-based deoxyribonucleic acid recognition.

In this present study, the preparation of chitosan functionalized gold­nickel wire nanomachines (nanomotors) (CS@Au-Ni NMs) for motion-based double-stranded deoxyribonucleic acid (dsDNA) recognition and detection was described. Synthesis of the nanomachines was accomplished by Ni layer formation using direct current (DC) magnetron sputtering over electrochemically deposited Au wires. Subsequently, biopolymer chitosan was dispersed onto this bimetallic layer by drop casting which could provide a novel and functional surface for leading bio-applications. CS@Au-Ni NMs were characterized via scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and zeta potential analysis methods for the elucidation of structural morphology, elemental composition and electrophoretic mobility. On account of presenting the application of these magnetic nanomachines, they were interacted with different concentrations of dsDNA and the changes in their velocities were investigated. The speed CS@Au-Ni NMs were measured as 19 µm/s under 22 mT magnetic field. These magnetically guided nanomachines demonstrated a practical and good sensing ability by recognizing dsDNA between 0.01 mg/L and 10 mg/L. Electrochemical characterization was also performed to identify the surface characteristics. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) experiments presented the interaction of the NMs with dsDNA by indicating the convenient recognition.

The prognostic value of thyroid gland invasion in locally advanced laryngeal cancers.

BACKGROUND: Locally advanced laryngeal cancers can spread to the thyroid gland by direct invasion of cricothyroid membrane. The prevalence of thyroid gland invasion (TGI) and the predictive factors of TGI were well described in literature. However, the association of TGI with survival was undetermined yet. OBJECTIVES: The aim of this study is to analyze the effects of TGI on survival rates in patients with locally advanced laryngeal cancer. MATERIALS AND METHODS: Medical records of 91 patients who underwent total laryngectomy with thyroidectomy were retrospectively reviewed. Demographical, clinical, and histopathological characteristics of the patients were noted. Kaplan-Meier test was used for survival analysis. RESULTS: Histopathology reports revealed the prevalence of TGI as 14.3% (13/91). Survival analyses showed that TGI did not affect recurrence free (p = .078) and overall (p = .080) survival rates. CONCLUSIONS: Thyroid gland invasion is one of the characteristic features of locally aggressive laryngeal tumors. In this study, TGI is not a statistically significant prognostic factor that has impact on survival of the patients with locally advanced laryngeal cancer.

Evaluation of the relationship between testosterone levels and burnout levels and job satisfaction in emergency department female employees: A prospective study.

OBJECTIVE: To evaluate the effect of testosterone on the status of burnout and job satisfaction. METHODS: The prospective study was conducted at the Kanuni Sultan Suleyman Education and Research Hospital, Istanbul, Turkey, from April 1 to May 1, 2019, and comprised all female employees working in the emergency department. Data was collected using the Maslach Burnout Inventory and Minnesota Job Satisfaction Scale. Blood samples 5 cc were taken to measure the testosterone hormone level. Data was analysed using SPSS 20. RESULTS: There were 95 females with a mean age of 33.6±7.1 years (range: 18-53 years). The level of exhaustion was high in 64(67.3%) subjects, intermediate in 20(21%) and low in 11(11.5%). the difference among the groups in relation to testosterone levels was significant (p<0.05). Though the difference in testosterone levels in the groups in terms of job satisfaction was also noted, it was not statistically significant (p>0.05). CONCLUSIONS: Hormone levels released from endocrine systems were found to be affected by psychosocial factors.