Modern methods to retrieve innovative material solutions for tribosystems
A numerical, tribological data collection system with 12,100 data records was developed to find materials for tribological operations. The databse enables the user to search, retrieve and display information and data about the appropriate material couples in a fast and conventient way. The database is intended to be used by researchers, engineers, consultants and developers. All tribological characteristics of the listed materials are directly comparable; the data has been compiled and put into a standardized form, which covers the specific properties of nearly all tribometers used. The structure and the precisely defined formats may help guide future scientists and engineers to organize, archive and publish their tribological tests and results in a complete and comprehensive way.
The development and use of tribology research-in-progress database
Preliminary efforts leading to the development of a researchinprogress database on tribology are described. The database contains brief abstracts of current tribology research being conducted by industry,s of current tribology research being conducted by industry, universities, research institutes and government laboratories based on a survey of active researchers. It also contains information on the types of activities, general areas of interest, program objectives, and tribology applications. The database can be used to evaluate the current status of research and development activities in the United States. The survey results suggest that there is a strong interest in an applied research in tribology, and that the level of basic fundamental research is extremely limited. The primary program objectives cited in connection with the tribology activities include long life, low maintenance, failure-free machinery, fundamental understanding, and materials development for improved performance. It is planned to expand and update the database on a
Formation of unexpected ions from a first-generation polyamidoamine dendrimer by use of methanol: an artefact due to electrospray emitter corrosion?
We report the formation of unexpected ions during the analyses of a first-generation polyamidoamine dendrimer in negative ion mode using an ion trap equipped with an electrospray ionisation source. These surprising ions corresponded to an increase of 12 m/z units over those expected. The formation of the unexpected ions was dependent on the tuning of the solution flow rate and the capillary high voltage. In addition, measurements of unusual value of the current suggested that a reaction was occurring in the corona plasma. The influence of methanol in this phenomenon was demonstrated by using CD(3)OH in the sample preparation. We propose two structures to explain the observed adduct based on the results of MS(2) experiments and by referring to previous work dealing with 12 m/z units addition. We showed that a corona discharge caused by alterations taking place to the electrospray capillary emitter was the origin of these unexpected ions. Finally, we discuss the mechanism involved in the formation of the ions and we propose means to control such artefacts.