In metal vapor vacuum arc (MEVVA) ion sources, vacuum arc plasma with cathodes of single, pure elements has been utilized for the production of metal ions. In this study, we have investigated the charge state distributions of ions produced in vacuum arc plasmas in a MEVVA ion source for the case when the cathode is an alloy or a compound material. The ion charge state spectra were analyzed by ...

production data and lithological interpretation are available to understand lithology and spectrum characteristics. We first model seismic responses in each well by using the log data and extracted wavelet to generate the synthetic seismogram. To determine the optimum phase value of the seismic source wavelet at each well, the phase of the

Exposure to Particulate Matter (PM) could function as an adjuvant depending on the city of origin in mice allergic asthma models. Therefore, our aim was to determine whether inhalation of fine particles (PM2.5) from Mexico City could act as an adjuvant inducing allergic sensitization and/or worsening the asthmatic response in guinea pig, as a suitable model of human asthma.

The removal efficiency of heavy metal ions (cadmium(II), Cd(II); cobalt(II), Co(II); nickel(II), Ni(II); copper(II), Cu(II)) by potassium ferrate(VI) (K2FeO4, Fe(VI)) was studied as a function of added amount of Fe(VI) (or Fe) and varying pH. At pH = 6.6, the effective removal of Co(II), Ni(II), and Cu(II) from water was observed at a low Fe-to-heavy metal ion ratio (Fe/M(II) = 2:1) while a ...

Canadian companies accounted for 12% of the investment in new projects in Mexico, this proportion increased to 33 % for the 2000, and is continuously increasing. These facts make mining in Mexico the second most important industry after the petroleum industry. Mexico is obliged to prepare human resources of higher quality to be ready to face the

World bivalve production and consumption has increased significantly in recent years, from a combined total for wild catch and aquaculture of approximately 10.7 million tonnes in 1999 to 14 million tonnes in 2006. Furthermore, the development of freight by air and sea and preservation techniques have enabled consumers, in different parts of the world, to enjoy eating bivalves produced in ...

ares) as well as in Mexico (>10 million hectares). Pinyon juniper, which has high extractives content and bark, has shown a fairly high sorption rate. Aspen fibers were used because of their high hemicellulose content. Most lignocellulosic raw materials need to be reduced in size before they can be …