Synthesis, non-spherical structure refinement and Hirshfeld surface analysis of racemic 2,2'-diisobut-oxy-1,1'-bi-naphthalene.

In the racemic title compound, CHO, the naphthyl ring systems subtend a dihedral angle of 68.59 (1)° and the mol-ecular conformation is consolidated by a pair of intra-molecular C-H⋯π contacts. The crystal packing features a weak C-H⋯π contact and van der Waals forces.

Influence of research and development, environmental regulation, and consumption of energy on CO emissions in China-novel spatial Durbin model perspective.

Global warming continues to be an intimidating factor for environmental protection, and reducing carbon emissions is an effective way to deal with the phenomenon. However, the energy sector is a significant contributor to greenhouse gas emissions. Therefore, investment in environmental regulations and research and development (R&D), is critical for fostering a low-carbon growth model.

[Role Of Imaging In The Management Of A Case Of Intrauterine Device Migration].

We report a case of intrauterine device (IUD) migration in order to describe the contribution of imaging in its diagnosis. It was a 35-year-old woman received on 06/01/2018 for pelvic ultrasound for pelvic pain. Ultrasound examination revealed a hyperechoic right para-uterine tubular image.

Relation between Vitamin D and COVID-19 in Aged People: A Systematic Review.

Background: Vitamin D has diverse and extensive effects on the immune system, including activating innate immunity and reducing the overactive adaptive immune response. A systematic review was performed to identify and synthesize the best available evidence on the association between vitamin D level and risk of COVID-19, adverse outcomes and possible benefits of supplementation in aged 60 years or over.

Methods: A literature search was performed in PubMed© and Scopus© for all publications from inception published before 15 March 2021.

In the era of humanitarian crisis, young women continue to die in childbirth in Mali.

Maternal mortality occurs mostly in contexts of poverty and health system collapse. Mali has a very high maternal mortality rate and this extremely high mortality rate is due in part to longstanding constraints in maternal health services. The central region has been particularly affected by the humanitarian crisis in recent years, and maternal health has been aggravated by the conflict.