A one-pot reaction between C2F5CH2NH2·HCl, NaNO2 and electron-deficient alkynes gives C2F5-substituted pyrazoles in excellent yields. The transformation smoothly proceeds in dichloromethane/water, tolerates the presence of air, and requires no purification of products by column chromatography. Mechanistically, C2F5CH2NH2·HCl and NaNO2 react first in water to generate C2F5CHN2, that participates...

900°C for 1hr after melting in air. These high permeability alloys have been named "Nimalloy." It is not considered, however, that the alloys are sufficiently homogenized by these treatments since a large discrepancy between the solidus and liquidus lines in the Ni-Mn system may result in tremendous segregation of the alloys on solidifying. Therefore, homogenization and purification of the allo...

Few studies analyze people’s preferences for ecosystem services (ES), disservices (ED) and drivers of change in less populated, tropical municipalities. Understanding such needs by the community stakeholder groups before actually assessing, modelling, measuring supply ES is key decision-making planning municipalities, as well conservation nearby neotropical dry forests. We studied these dynamic...

The present paper is a review on methods and technologies for air cleaning from micro organisms and viruses, which are applicable with the present HVAC practices. The advantages and the drawbacks of air dilution, filtration (HEPA, ULPA), ultraviolet germicidal irradiation (UVGI), photocatalytic oxidation (PCO), plasmacluster ions and other technologies for air disinfection and purification is c...

A physico-chemical research of bis-(dipivaloylmethanato)barium(II) (Ba(thd)2) has been carricd out from the point of its use in CVD processes as a precursor (thermal stability, immunity to external effects and etc.). The optimal conditions for synthesis, purification and storage have been found. It has bee11 shown. that the sublimated product presents a mixture of several modifications with the...

Abstract The physical/chemical abatement of gas pollutants creates many technical problems, is costly and entails significant environmental impacts. Biological purification off-gases a cheap ecologically safe way neutralization pollutants. Despite the recent advances, main technological challenge nowadays volatile organic compounds (VOCs) hydrophobic character due to their low solubility in wat...

This study was aimed (i) to develop an effective method for the purification of ginsenosides for industrial use and (ii) to compare the distribution of ginsenosides in cultured wild ginseng roots (adventitious root culture of Panax ginseng) with those of red ginseng (steamed ginseng) and white ginseng (air-dried ginseng). The crude extracts of cultured wild ginseng roots, red ginseng, and white...

BACKGROUND Exposure to ambient particulate matter (PM) is associated with a number of adverse health outcomes, but potential mechanisms are largely unknown. Metabolomics represents a powerful approach to study global metabolic changes in response to environmental exposures. We therefore conducted this study to investigate changes in serum metabolites in response to the reduction of PM exposure ...