Social distancing is the only option available during the COVID‐19 pandemic until a vaccine is developed. However, this is having a major impact on human relationships and bonding between parents and ...neonates is a major concern. Separation during this health emergency could have lifelong consequences for offspring, and there are even greater concerns if newborn infants are sick or vulnerable and need intensive care. We look at how bonding can be safely supported and maintained without risking infecting neonates, by comparing the international guidelines and proposing safe actions within those frameworks.
Triazine-based polymer scaffolds with controllable porosity were prepared through a dynamic polymerization scheme based on a broad variety of aromatic nitriles, upon polytrimerization of the latter ...from ZnCl2 salt melts at high temperatures. In the present study, the reaction parameters such as the temperature and monomer concentration as well as the geometry and functionality of the monomers were systematically varied. A comprehensive overview of the influences of these parameters on the outcome of the polymerization reaction in terms of chemical nature and porous properties of the materials is proposed. Rather than the variation of the monomer size and/or geometry, the reaction parameters were found to play a crucial role for tuning the porosity of the materials and especially the reaction temperature. Finally, the use of functional aromatic bridging units allowed the formation of functional polymer scaffolds with the ability to coordinate metal salts, introducing the possibility to design new metallo-organic materials.
Again and again and again: The title reaction was achieved on a solid catalyst in a covalent triazine‐based framework formed by trimerization of 2,6‐dicyanopyridine in a ZnCl2 melt. The material ...possesses bipyridine units as coordination sites for platinum. It shows high activity and can be separated easily from the reaction mixture and recycled several times without significant loss of activity.
Finding suitable (transportable) storage devices for hydrogen is one of the key points to really access the foreseen "hydrogen economy". While numerous studies are devoted to finding inorganic ...materials enabling the storage of hydrogen with high energy densities under "mild" conditions, relatively less effort has been focused on the search for purely organic storage solutions. This review aims to focus on these pioneering works.
For over 30 years complexes with the general formula NiPh(P,O)L (L = tertiary phosphine; P,O = chelating phosphanylenolato ligand) have been used as highly efficient oligomerisation catalysts ...suitable for the production of linear alpha-olefins. The same complexes, which are usually referred to as SHOP-type catalysts (SHOP = Shell Higher Olefin Process) can also be used as ethylene polymerisation catalysts, provided they are treated with a phosphine scavenger that selectively removes the tertiary phosphine ligand (L). This Perspective examines the impact of various parameters (influence of the substituents, backbone size, solvent, use of co-catalysts, etc.) on the catalytic outcome of the complexes. Overall, this review shows that the selectivity and activity of the catalyst may be tuned efficiently through directed modification of the P,O chelator.
Congenital volvulus without a prenatal diagnosis of malrotation is an extremely rare cause of acute intestinal obstruction in the foetal and neonatal period with a high morbidity and mortality. The ...aim of this report is to describe prenatal imaging, pregnancy characteristics and clinical outcomes to identify a gold standard management approach for neonates affected by congenital volvulus through our experience with this case as well as a review of the literature.
We describe an intrauterine case of volvulus without malrotation suspected by prenatal ultrasound at 28 weeks' gestation, with enlarged hyperechogenic loops without peristalsis in a 715g preterm boy born at 29 weeks' gestation. The discrepancy between the minimal clinical manifestations and the severity of intestinal pathology is highlighted. At explorative laparotomy following delivery, a congenital mesenteric defect was identified through which small bowel had herniated and volvulised, causing prenatal bowel dilatation and necrosis. The necrotic bowel was resected, and both an ileostomy and jejunostomy were created within 30 hours of birth. However, severe post-operative complications were encountered, which ultimately led to the newborn's death.
Foetal volvulus is a rare condition with high rates of preterm birth and perinatal mortality. A high index of suspicion is required in cases of bowel dilatation, intestinal duplication or malrotation. Strict foetal follow up with serial ultrasound assessment and planned cesarean delivery are recommended. Multidisciplinary care is essential. Time of delivery and surgical intervention should be standardised to reduce the risk of neonatal mortality.
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Template‐free tuning of nanopores in highly porous carbonaceous polymers can be achieved through polymerization of dicyanobiphenyl at high temperatures in a ZnCl2 melt.
Abstract Aim To issue practical recommendations regarding the optimal care of nasal skin when non‐invasive ventilation support is used. Methods We performed a systematic search of PubMed to identify ...relevant papers published in English or French through December 2019. Different grades of evidence were evaluated. Results Forty‐eight eligible studies. The incidence in preterm infants was high. The lesions were more frequent for preterm infants born under 30 weeks of gestational age and/or below 1500 g. The lesion was most often located on the skin of the nose but could also be found on the intranasal mucous membranes or elsewhere on the face. Nasal injuries appear early after the beginning of non‐invasive ventilation at a mean of 2–3 days for cutaneous lesions and eight or nine for intranasal lesions. The most effective strategies to prevent trauma are the use of a hydrocolloid at the beginning of the support ventilation, the preferential use of a mask and the rotation of ventilation interfaces. Conclusion Nasal injuries with continuous positive airway pressure treatment in preterm newborn infants were frequent and can induce pain, discomfort and sequelae. The immature skin of preterm newborn infants needs specific attention from trained caregivers and awareness by parents.
A new generation of porous polymers was made for various energy‐related applications, e.g., as fuel cell membranes, as electrode materials for batteries, for gas storage, partly from renewable ...resources. This review intends to catch this emerging field by reporting on a variety of different approaches to make high performing polymers porous. This includes template techniques, polymers with inherent microporosity, polymer frameworks by ionothermal polymerization, and the polymerization of carbon from appropriate precursors and by hydrothermal polymerization. In this process, we try to not only identify the current status of the field, but also point to open question and tasks to identify the potentially relevant progress.
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