BACKGROUND Preservatives present in cosmetics and other industrial products can cause allergic contact dermatitis. The aim of the study was to assess the frequency of allergy to selected preservatives in consecutive patients examined due to contact dermatitis in the Nofer Institute of Occupational Medicine, Łódź, and to establish whether individuals sensitized to formaldehyde react simultaneous...

Multidimensional solid-state NMR spectroscopy is used to refine the identification and abundance determination of functional groups in insoluble organic matter (IOM) isolated from a carbonaceous chondrite (Murchison, CM2). It is shown that IOM is composed primarily of highly substituted single ring aromatics, substituted furan/pyran moieties, highly branched oxygenated aliphatics, and carbonyl ...

A chemical optical fiber sensor based on surface plasmon resonance (SPR) was developed and implemented using multimode plastic fiber. The is used to detect measure the refractive index concentration of various materials (Urea, Ammonia, Formaldehyde Sulfuric acid) as well evaluate performance parameters such sensitivity, signal noise ratio, resolution figure merit. It noticed that value sensitiv...

Urea-formaldehyde (UF) resin (F/U: 1.25), melamine-urea-formaldehyde (MUF) resin (F/(U+M): 1.05), and three kinds of wood species including poplar (Populus davidiana Dode), beech (Fagus engleriana Seem.), and eucalyptus (Eucalyptus robusta Smith) were used to produce plywood. The effects of sealing treatment and wood species on the formaldehyde emissions were studied. The anatomical characteris...

The objective of this study was the evaluation feasibility producing particleboard for general use using cotton gin waste generated in Argentina and urea formaldehyde resin. chemical composition size distribution particles ginning residue as well mechanical physical properties particleboards obtained were investigated. Density flexural strength produced with varying levels urea-formaldehyde res...