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, B , Szombathely , MV , Hoffmann , J , Brauer , P . 1995 Characterization of the acidic properties of zeolites by means of temperature-programmed desorption (TPD) of ammonia. Calculation of distribution function of the desorption energy . J
the surface, the groups with acidic properties also appear. Therefore, it can be assumed that in the deposited samples ZrP itself influences on the surface charge more than a support. Conclusions The
geospatial data [ 2 ]. The management and analysis of GIS data are traditionally done using Relational DataBase Management Systems (RDBMS) due to their strong data consistency, transactional support, and Atomicity, Consistency, Isolation, and Durability (ACID
elution conditions for the basic analyte from the sorbent with acidic properties. The use of an optimized SPE procedure allowed for slightly satisfactory obtaining of nesfatin-1 recovery value from biological sample ( Table 2 ). Table 2. Mean recoveries
the positively ionized form at a physiologic pH (7.4) [ 37 ]. HCT has acidic properties due to its sulfonamide groups, with p K a values of 7.9 and 9.09 [ 38 ], so it may be unionized at the working BGE. Finally, BEN has p K a values of 3.1 and 5