Thermodynamic Study: C-H Bond Activation of Methane with OsO+

Catalysis plays a critical role in the accomplishment of industrially significant chemical transformations, by requiring less energy investment in underlying processes. Computational chemistry has had a pronounced impact on the understanding of the role of catalysts at the atomic and molecular level, contributing to design of more efficient catalysts. In this study, we compute thermochemical properties attending C-H bond activation of methane by $OsO^+$ and enabling subsequent dehydrogenation and dehydration reactions. It is found that the dehydrogenation channel is thermodynamically more favorable. This study should contribute to the understanding of C-H bond activation using homogeneous catalysis of partial oxidation of natural gas (methane) leading to formation of the easily transported liquid fuel methanol

Mode of delivery does not have a relationship with high-risk HPV positivity

WOS: 000560762700016Objective: This study aims to evaluate the delivery room data for patients who give birth with standard vaginal delivery and caesarean section (C/S), to estimate whether high-risk (HR) HPV status affected the mode of delivery. Methods: Between January 2014 and January 2018, 8,376 pregnant women gave birth in our hospital. of 8,376 patients, 1,039 pregnant women were aged 30 years and older and had HPV results known. They had a singleton pregnancy and no contraindications for standard delivery. Results: C/S rates for all HR HPV groups were lower than for all HPV-negative groups. However, no statistically significant difference was found between HR HPV-positive and HPV-negative patients for C/S rates got all 987 patients (18.75% vs. 24.39%) (p = 0.463), 245 primiparous patients (50.0% vs. 59.83%) (p = 0.629) and 742 multiparous patients (11.53% vs. 12.56%) (p = 0.876). Conclusion: HR HPV positivity does not affect normal vaginal labour progress and does not statistically increase C/S rates at the labour ward. Therefore, HR HPV positivity should not be regarded as a negative risk factor for normal vaginal labour progress

Association Between Mobile Phone Radiation Exposure and the Secretion of Melatonin and Cortisol, Two Markers of the Circadian System : A Review

The extremely important use of mobile phones in the world, at all ages of life, including children and adolescents, leads to significant exposure of these populations to electromagnetic waves of radiofrequency. The question, therefore, arises as to whether exposure to these radiofrequencies (RFs) could lead to deleterious effects on the body's biological systems and health. In the current article, we review the effects, in laboratory animals and humans, of exposure to RF on two hormones considered as endocrine markers: melatonin, a neurohormone produced by the pineal gland and cortisol, a glucocorticosteroid synthesized by the adrenal glands. These two hormones are also considered as markers of the circadian system. The literature search was performed using PubMed, Medline, Web of Sciences (ISI Web of Knowledge), Google Scholar, and EMF Portal. From this review on RF effects on cortisol and melatonin, it appears that scientific papers in the literature are conflicting, showing effects, no effects, or inconclusive data. This implies the need for additional research on higher numbers of subjects and with protocols perfectly controlled with follow‐up studies to better determine whether the chronic effect of RF on the biological functioning and health of users exists (or not). Bioelectromagnetics