Stable isotopes, such as C, N, O and S, are successfully used as classical environmental tracers. During the last few years, heavy stable isotopes are getting m
Recently, the impacts of increasing atmospheric CO2 level on the terrestrial ecological system have been intensively studied. The higher the CO2 concentration,
Pyrolysis of lignite was conducted at high temperatures from 400 to 700℃ and high pres- sures of 1 and 3 GPa in a closed system in order to investigate pressur
On the basis of the theory of viscoelastic displacement and strain field for the three-dimensional rheologic model of earthquake preparation, this paper mainly
Most descriptions and studies about folds have been associated with consolidated strata; fold deformation in loosely-consolidated sediments, however, has been r
The ores of the Yata gold mine in China are rich in arsenic and antimony, so the exploitation of this mine may also lead to the release of As and Sb to adjacent
In second language acquisition, motivation is a key factor affecting students’study performance and effect. This paper aims at investigating and analyzing non-
Votalization of selenium in selenium-rich black rock series in Yutangba is discussed at 400, 500, 600, 700, 800 and 900℃. Votalization of selenium tends to inc
The sampling method of karst soil is always the one used for non-karst area. However, if the samples can represent the plot, it still needs further investigatio
The history of eolian dust deposition in northern China has been traced back to 22 million years ago (Ma) and the combination of different eolian formations pro