Can disposable masks be worn more than once?

Disposable facemasks are a primary tool to prevent the transmission of SARS-COV-2 during the COVID-19 pandemic.However, plastic waste generated from their disposal represents a significant environmental problem that can be reduced by maximizing the service life of disposable masks.We evaluated the effect of repeated wearing on the fitted filtration

read more

Found but lost? The short-lived success of Crataegus coccinea L. (Rosales: Rosaceae) in north-eastern Sicily (Italy)

154 Two exsiccata sampled at the end of the 19th century, and wrongly identified as Pyrus torminalis or Sorbus torminalis in the herbarium of Francesco Tornabene at Catania, belonged to a woody species never reported to occur in Sicily, Crataegus coccinea.This hawthorn, native to eastern North America, grew in two different sites located on the foo

read more

Benchmarking L-PBF Systems for Die Production: Powder, Dimensional, Surface, Microstructural and Mechanical Characterisation

While conventional die manufacturing techniques often lead to limitations in production speed and design intricacy due to labour-intensive procedures like machining and casting, Additive Manufacturing (AM) emerges as a key player offering substantial potential for cost switch power wire reduction and process improvement in mass production.This stud

read more

Experimental Status of the Chiral Magnetic Effect

Experimental searches for definitive evidence of the Chiral Magnetic Effect in heavy-ion collisions have become increasingly ingenious over the past decade, but a clear separation of any CME signal from flow-related backgrounds remains elusive.Although the isobar analysis by STAR does not appear to show a signal given the current preliminary backgr

read more

The genera Polygonum and Bilderdykia (Polygonaceae) in southern Africa: morphology and taxonomic value of the ocrea and fruit

The external morphology of the fruit and the ocrea of 16 taxa of Polygonum and Bilderdykia in southern Africa c was studied.Fruits are either lenticular or trigonous.Six types of fruit surfaces were distinguished.Five types of ocreae were found, characterized by: a green undulating limb; a silvery hyaline sheath; a brown tubular sheath without term

read more