Search

To analyze the epidemiological characteristics of malaria in Leshan City, so as to provide the evidence for formulating the strategy and measures for consolidating the achievements of malaria elimination.The data of epidemiological characteristics of malaria in Leshan City from 1950 to 2015 were collected and analyzed with the descriptive epidemiology method.There were four larger scale epidemics of malaria in Leshan City from 1950 to 2015. The order of malaria in infectious diseases dropped from the first to the twentieth. The peak season for malaria epidemics ceased. The Plasmodium species, patient age, occupation and sex distribution of malaria were different in the different periods. In November 2016, the whole city achieved the national standard for malaria elimination.After years of prevention and control, the epidemiological characteristics of malaria have changed significantly in Leshan City, and the effect of anti-malarial measures is significant. In the future, we should strengthen the monitoring, and prevention and control of imported malaria.

The determination of the thermodynamic constants for the extraction of the neodyrriium salts, Nd(NCS)3, Nd(ClO4)3 and Nd(NO3)3 with Di(l-methyl-heptyl) methyl phosphonate, and the crystal and molecular structures of the respective extracted complexes with triphenyl phosphine oxide, used as a model molecule of neutral organophosphine extractants, are reported here. The influence of the different anions on these systems has been interpreted microscopically and macroscopically. The IR data of the saturated organic phases and the solid complexes have been discussed as well.

The enthalpy determination of an extraction reaction by a direct static measurement with a Calvent calorimeter is developed. The −ΔH° value measured in this work is larger than that obtained using the temperature coefficient measurement.