China
Africa
Explore chapters and articles related to this topic
Inhalation Toxicity of Metal Particles and Vapors
Published in Jacob Loke, Pathophysiology and Treatment of Inhalation Injuries, 2020
Calcium metal and its compounds are used extensively in industry, medicine, and veterinary medicine. Metallic Ca is used as a deoxidizer in the purification of such metals as Cu and Be, and alloys such as steel (with Si). Some of the uses of Ca salts are: as a fixer in photography; dyeing, tanning, and curing of skins, insecticides; pesticides; and in the manufacture of melamine resin used in making plastic products. Slaked lime, with numerous uses, is a most inexpensive base used in the chemical industry.
The internal radiation hazard
Published in Alan Martin, Sam Harbison, Karen Beach, Peter Cole, An Introduction to Radiation Protection, 2018
Alan Martin, Sam Harbison, Karen Beach, Peter Cole
Working surfaces should be finished in hard non-porous materials which have the necessary heat- and chemical-resisting properties. The most commonly used materials include the following: Melamine resin plastic laminate such as Formica®. It should be bonded to the backing material with a resin glue to give the necessary temperature resistance.PVC sheet, such as Darvic, which can be welded and is completely self-extinguishing.Stainless steel, but there is a tendency to get physical bonding between it and corrosion products. Also, stainless steels are susceptible to attack from certain chemicals, for example hydrochloric acid.Glass fibre–reinforced resin which can be moulded to shape. This can be treated to make it fire resistant.Modern man-made compounds such as high-pressure laminates (e.g. Trespa®) and advanced composites (e.g. Corian® Polypropylene), which can be welded and heat-formed.
Force adaptation through the intravenous route in naïve mice
Published in Experimental Lung Research, 2023
Magali Boucher, Cyndi Henry, Ynuk Bossé
Previous studies also opted for the nebulized route of delivery to test the impact of force adaptation on the in vivo response to methacholine.6–8 This amplifies the above concerns for at least two reasons. First, although the deposition pattern of certain nebulized nanoparticles, such as melamine resin, can be impressively widespread and homogeneous throughout the lung19 using specific ventilation profile,19,20 nebulized methacholine is typically thought to accumulate predominantly in large airways in a patchily manner; alike tantalum dust,21 technetium-99m-labeled pentetic acid,22 and iodine.23 Early after the nebulization, this means that some conducting airways are constricting while the surrounding peripheral airways are still compliant, an imbalance furthering airway narrowing heterogeneity24,25 and small airway closure.26,27 Second, the stimulation of ASM by methacholine through the inhaled route and the epithelium for a longer period in the challenge with tone, compared to the challenge without tone, may concurrently further mucus secretion.28–32 The latter promotes heterogeneity and closure, chiefly by increasing the propensity of plugging,33 either by directly drowning small airways or by increasing surface tension and the formation of stretchable menisci across the luminal area that also functionally blocks airflow in subtending airways.
Fluorescent melamine-formaldehyde/polyamine coatings for microcapsules enabling their tracking in composites
Published in Journal of Microencapsulation, 2022
Christian Neumann, Sophia Rosencrantz, Andreas Schmohl, Latnikova Alexandra
The chemicals were purchased from INEOS (London, UK), Carl Roth (Karlsruhe, Germany), VWR (Radnor, PA), Thermo Fisher Scientific (Waltham, MA), and Sigma-Aldrich (St. Louis, MO) and used without further purification unless stated otherwise. Distilled water was used in all experiments. The MF-prepolymer was provided by INEOS melamines and is specified as a partial methylol etherified melamine resin with solid content of 85% w/w and a viscosity of η = 5400 mPa*s. The ethylenediamine (EDA), the branched PEI with an average molar mass of 2000 g/mol (50% w/w in H2O) and 20 000 g/mol were purchased by Sigma-Aldrich (St. Louis, MO). The linear PVAm (Lupamin 1595, technical grade) with Mw = 10 000 g/mol was provided by BASF. The 40–70 µm sized glass beads were purchased from Sigmund Lindner GmbH (Warmensteinach, Germany). The PMMA (low molar mass, 18223-0) was provided by Sigma-Aldrich (St. Louis, MO) and the used diuron (3-(3,4-dichlorphenyl)-1,1-dimethylharnstoff, 98% w/w) was supplied by LONZA (Basel, Switzerland). Spray dried arabic gum (4159.1, Roth) and poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol) known as Pluronic P-123 with number average molar mass of Mn = 5800 from Sigma-Aldrich (St. Louis, MO) were used. Fassadenweiss Acrylat provided by RENOVO was used as plaster here.