The Impact of Metal-Based Nanoparticles Produced by Different Types of Underwater Welding on Marine Microalgae.

Underwater wet welding is commonly used in joining pipelines and in underwater construction. Harmful and hazardous compounds are added to many flux-cored wires for underwater welding and cutting, and can have a negative impact on marine life. The specific objective of this study was to evaluate the aquatic toxicity of two suspension samples obtained using welding electrode and flux-cored wire in marine microalgae and .

Aquatic toxicity of particulate matter emitted by five electroplating processes in two marine microalgae species.

Electroplating is a widely used group of industrial processes that make a metal coating on a solid substrate. Our previous research studied the concentrations, characteristics, and chemical composition of nano- and microparticles emitted during different electroplating processes. The objective of this study was to evaluate the environmental toxicity of particulate matter obtained from five different electrochemical processes.

Identification of cement in atmospheric particulate matter using the hybrid method of laser diffraction analysis and Raman spectroscopy.

The production of cement is associated with the emissions of dust and particulate matter, nitrogen oxides (NO), sulfur dioxide (SO), carbon monoxide (CO), heavy metals, and volatile organic compounds into the environment. People living near cement production facilities are potentially exposed to these pollutants, including carcinogens, although at lower doses than the factory workers. In this study we focused on the distribution of fine particulate matter, the composition, size patterns, and spatial distribution of the emissions from Spassk cement plant in Primorsky Krai, Russian Federation.

Dependence of welding fume particle toxicity on electrode type and current intensity assessed by microalgae growth inhibition test.

Welding fumes are a major source of metal oxide particles, ozone, carbon monoxide, carbon dioxide, nitrogen oxides, and many other toxic substances. Hazardous properties and the level of toxicity of welding fumes depend mostly on the welding electrode type and the welding regime parameters. The specific objective of this study was to evaluate the aquatic toxicity of metal welding fume particles in vivo on microalga Heterosigma akashiwo.

Simultaneous excision of two cerebral abscesses with the capsule.

Case Report: A boy of 8 suffering from hemoglobinopathy M had two encapsulated cerebral abscesses confirmed on CT--one in the right temporal lobe, the second in the left frontal lobe--measuring 48 and 58 mm in diameter respectively. The disease began with fever, daily vomiting, and permanent somnolency, and was defined as encephalitis of viral etiology.

Treatment: Conservative treatment proved ineffective and the patient's state grew worse.