Conversion of waste poly(vinyl chloride) to branched polyethylene mediated by silylium ions.

Full dechlorination of poly(vinyl chloride) (PVC) in a controlled manner to yield useful polymeric and chlorinated products is of great interest for the processing of PVC waste. Forming polyethylene (PE) without corrosive by-products would allow for a pre-treatment of PE wastes that are often contaminated with PVC. Herein, full dechlorination of PVC has been achieved generation of silylium ions , to furnish PE products.

COVID-19 Vaccination Is Safe among Mast Cell Disorder Patients, under Adequate Premedication.

Reported cases of anaphylaxis following COVID-19 vaccination raised concerns about the safety of these vaccines, namely in patients suffering from clonal mast cell (MC) disorders-a heterogenous group of disorders in which patients may be prone to anaphylaxis caused by vaccination. This study aimed to assess the safety of COVID-19 vaccines in patients with clonal MC disorders. We performed an ambidirectional cohort study with 30 clonal MC disorder patients (n = 26 in the prospective arm and n = 4 in the retrospective arm), that were submitted to COVID-19 vaccination.

Patterns of dosage regimen instructions regarding topical medicines: how is the information perceived by patients?

Background: The communication of dosage regimen instructions by physicians is of utmost importance on treatment adherence. Few studies until now have approached the topical treatment adherence subject.

Objective: This study aims the characterization of dosage regimen instructions given by physicians and the assessment of chronic dermatological patients' perception regarding these instructions.

Type B adverse drug reactions reported by an immunoallergology department.

Objective: Characterization of the adverse drug reactions (ADR) reported by the immunoallergology department (IAD), Centro Hospitalar de São João (Porto), to the Northern Pharmacovigilance Centre (NPC).

Methods: An observational, descriptive and retrospective study was conducted, based in a spontaneous report system. Participants were all the patients from the IAD, with suspected ADR, reported to NPC by specialists after the study was completed.

[One-week variation of cotton dust and endotoxin levels in a cotton mill. Relation with the daily variation of the expiratory flow rates].

Unlabelled: The prevalence of respiratory occupational diseases in the textile industry depends on environmental factors such cotton dust (CTD) levels and gram negative bacteria endotoxin (EDX) contamination.

Objective: To assess the environmental conditions (CTD and EDX) during one week in a cotton mill with respect to FEV1 variation throughout the work shift.

Population And Methods: 47 cotton mill workers (24F, 23M); average age: 42 +/- 11 years; average exposure to cotton dust: 22.