Chemical Communication between Organometallic Single-Chain Polymer Nanoparticles.

Chemical communication between macromolecules was studied by observing the controlled single chain collapse that ensues the exchange of a metal cross-linker between two polymer chains. The rhodium (I) organometallic cross-linker transfer from a low molecular weight collapsed polybutadiene to a larger polymer was followed using size exclusion chromatography. The increased effective molarity in the larger polymer seems to be the driving force for the metal migration.

Effect of lactation on the recurrence rate of gestational diabetes mellitus: a retrospective cohort study.

Purpose: To examine the impact of lactation on the recurrence rate of gestational diabetes mellitus (GDM).

Methods: Retrospective cohort study performed in a single teaching hospital on data between 2009 and 2016. The study group consisted of women who had a diagnosis of GDM and breastfed exclusively for ≥ 1 month.

Help me if you can: Psychological distance and help-seeking intentions in employee-supervisor relations.

Social support at work is considered useful in treating job-related stress, and supervisors' emotional support has been found to be the most effective source of support at work. But an understanding of what elements make employees use supervisors as a source of emotional support is lacking. The present qualitative study included in-depth interviews with 24 teachers and 12 principals and a focus group with 12 school counsellors.

The effect of type and volume of fluid hydration on labor duration of nulliparous women: a randomized controlled trial.

Purpose: Type and volume of fluid administered for intrapartum maintenance had been reported to differently affect labor length, delivery mode, and cord artery pH and glucose level. We aimed to compare the effect of three different fluid regimens on labor duration.

Methods: In a randomized trial, healthy nulliparous in labor were randomized into one of three intravenous fluid regimens: group 1, the reference group, lactated Ringer's solution infused at a rate of 125 mL/h; group 2, lactated Ringer's solution infused at a rate of 250 mL/h; group 3, 0.

Single-chain polybutadiene organometallic nanoparticles: an experimental and theoretical study.

High molecular weight polybutadienes and rhodium complexes were used to produce single chain organometallic nanoparticles. Irradiation of high -polybutadiene in the presence of a photosensitizer isomerised the double bonds to produce differing / ratios within the polymer. Notably, a higher percentage of carbon-carbon double bonds within the polymer structure led to faster binding of metal ions, as well as their faster removal by competing phosphine ligands.