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Five new species of Stenothemus Bourgeois from Guangxi, China (Coleoptera, Cantharidae)
Ge Shujuan,Liu Haoyu,Yang Xing-ke,Yang Yuxia 한국응용곤충학회 2021 Journal of Asia-Pacific Entomology Vol.24 No.3
Five new species of Stenothemus Bourgeois, 1907 from Guangxi, China are described, S. normalis sp. nov., S. flavicans sp. nov., S. nigripennis sp. nov., S. elongaticeps sp. nov. and S. maculaticollis sp. nov.. They are illus trated with habitus photos and aedeagi of males, also abdominal sternites VIII and internal genitalia of females. A key for the identification of the above species is provided.
Oxalate formation during hydrogen peroxide-reinforced oxygen delignification
Yingying Liu,Shujuan Ge,Youming Li,Bingyun Li,Hailong Li 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.58 No.-
The effects of different process parameters (alkali dosage, hydrogen peroxide dosage, temperature, reaction time, and oxygen pressure) on oxalate formation during hydrogen peroxide-reinforced oxygen delignification (OP) of Eucalyptus kraft pulp were investigated in the present study. The relationships between oxalate formation and the dosages of both alkali and peroxide were found to be almost linear. Oxalate formation could be divided into “fast” and “slow” periods, depending on the reaction time. The best selectivity for the OP process was achieved using an alkali dosage of 2.0%, a hydrogen peroxide dosage of 2.0%, a temperature of 100 °C, an oxygen pressure of 0.6 MPa and a reaction time of 60 min. Oxalate formation was also, to some extent, reduced under these conditions. These results will be very helpful in optimizing the OP process, controlling oxalate formation and improving product quality.