Advertisement

Topics

Physicochemical characterisation of different welding aerosols.

Summary of "Physicochemical characterisation of different welding aerosols."

Physicochemical properties important in exposure characterisation of four different welding aerosols were investigated. Particle number size distributions were determined by scanning mobility particle sizer (SMPS), mass size distributions by separation and weighing the individual size fractions of an 11-stage cascade impactor. The size distribution of the primary particles of agglomerates, chemical composition and morphology of the particles were examined by TEM. There were significant differences in the particle number size distributions of the different welding aerosols according to the SMPS determinations. The particle mass size distributions determined gravimetrically were, however, not really different. The dominant range with respect to mass was between 0.1 and 1 μm, regardless of the welding technique. Most of the primary particles in all different welding aerosols had diameters between 5 and 40 nm. All types of primary particles had a tendency to form chainlike agglomerates. A clear size dependence of the particle chemical composition was encountered in the case of manual metal arc welding aerosol. Small particles with diameters below 50 nm were mostly metal oxides in contrast to larger particles which also contained more volatile elements (e.g. potassium, fluorine, sodium, sulphur).

Affiliation

National Institute of Occupational Health, P.O. Box 8149 Dep., 0033, Oslo, Norway, bbe@stami.no.

Journal Details

This article was published in the following journal.

Name: Analytical and bioanalytical chemistry
ISSN: 1618-2650
Pages:

Links

DeepDyve research library

PubMed Articles [1015 Associated PubMed Articles listed on BioPortfolio]

Development of technique for laser welding of biological tissues using laser welding device and nanocomposite solder.

The laser device for welding of biological tissues has been developed involving quality control and temperature stabilization of weld seam. Laser nanocomposite solder applied onto a wound to be weld h...

Investigations of the contact bounce behaviors and relative dynamic welding phenomena for electromechanical relay.

Dynamic welding, being the principal mechanism of sticking failure, correlates closely with the contact bounce of electromechanical relay. The typical waveforms of dynamic contact force and contact vo...

Optimization and Prediction of Ultimate Tensile Strength in Metal Active Gas Welding.

We investigated the effect of welding parameters on ultimate tensile strength of structural steel, ST37-2, welded by Metal Active Gas welding. A fractional factorial design was used for determining th...

Substrateless-Welding of Self-Assembled Silver Nanowires at Air/Water Interface.

Integrating connected silver nanowire networks with flexible polymers has appeared as a popular way to prepare flexible electronics. To reduce the contact resistance and enhance the connectivity betwe...

Ultrasonic Welding of Thermoplastic Composite Coupons for Mechanical Characterization of Welded Joints through Single Lap Shear Testing.

This paper presents a novel straightforward method for ultrasonic welding of thermoplastic-composite coupons in optimum processing conditions. The ultrasonic welding process described in this paper is...

Clinical Trials [31 Associated Clinical Trials listed on BioPortfolio]

Source Profiling of Biohazardous Aerosols in Hospitals

To characterise the physical parameters (number concentration, size distribution and their trajectories) of aerosols (droplets) generated in high risk procedures.

The Evaluation of Pre-Post Smoke Evacuation Uses on Surgical Smoke and Bio-Aerosols in Operating Rooms

This study aims to evaluate the pre-post smoke evacuation uses on surgical smoke and bio-aerosols particles in operating rooms at a university hospital, Thailand.

STACCATO: Stent sTrut Apposition and Coverage in Coronary ArTeries: an Optical Coherence Tomography (OCT) Study

Assessment of vessel healing after DES implantation in STEMI, NSTEMI and stable/unstable angina patients: a randomized comparison between everolimus and biolimus A9-eluting stents: an opti...

Detection and Characterisation of Varicella Zoster Virus From Dermal Lesions of Chickenpox-Infected Patients

This study is conducted in order to collect clinical samples from patients who are diagnosed of having chickenpox infection. The results of this study will provide basic scientific informa...

Developing Rectal USPE Measures

The purpose of this study is to: (a) adapt existing vaginal USPE items/instruments for evaluation of similar elements of rectal compartment use; (b) develop these scales using 3 distinct ...

Medical and Biotech [MESH] Definitions

A form of pneumoconiosis resulting from inhalation of iron in the mining dust or welding fumes.

Physical reactions involved in the formation of or changes in the structure of atoms and molecules and their interactions.

Colloids with a gaseous dispersing phase and either liquid (fog) or solid (smoke) dispersed phase; used in fumigation or in inhalation therapy; may contain propellant agents.

The physical phenomena describing the structure and properties of atoms and molecules, and their reaction and interaction processes.

Quick Search
Advertisement
 


DeepDyve research library

Relevant Topic

Nutrition
Within medicine, nutrition (the study of food and the effect of its components on the body) has many different roles. Appropriate nutrition can help prevent certain diseases, or treat others. In critically ill patients, artificial feeding by tubes need t...


Searches Linking to this Article