Zobrazeno 1 - 10
of 33
pro vyhledávání: '"Jian Ping, Duan"'
Publikováno v:
Journal of Gastrointestinal Oncology. 13:3154-3168
Publikováno v:
Journal of Zhejiang University-SCIENCE B. 20:793-802
Objective: In this study, we investigated the changes in peripheral blood inflammatory factors and intestinal flora in acquired immune deficiency syndrome (AIDS) and human immunodeficiency virus (HIV)-positive individuals (AIDS/HIV patients), and exp
Publikováno v:
In Talanta 1999 49(2):319-330
Autor:
Jian Ping Duan, Sheng Hua Lv
Publikováno v:
Advanced Materials Research. 487:24-28
Effect of polycarboxylate superplasticizer (PCs) with different bond between side chain and truck chain on hydration of cement in early period was studied. The performance of PCs in concrete was investigated by setting time, TGA and SEM. PC-based sup
Publikováno v:
steel research international. 83:269-287
In order to obtain the optimal structural parameters of the dug arch or round hole(s) at dam bottom in an 1820?tons asymmetrical T-type single-strand continuous casting tundish, the flow field profiles and temperature profiles of molten stainless ste
Publikováno v:
Advanced Materials Research. :1207-1210
Sulfonated chitosan (SCS) was prepared from chitosan and sulfuric acid via sulfation reaction. SCS was used as superplasticizer in cement. The test showed that the maximum fluidity of the cement paste was 232 mm with dosage of 0.75 wt % at water to c
Publikováno v:
Advanced Materials Research. :600-605
Maleic anhydride modified polycarboxylates superplasticizes (MPC) was synthesized from allylic poly (ethylene oxide ether) (APEG), maleic anhydride (MAH), sodium methylallyl sulfonate (SMAS) using ammonium persulfate (APS) as initiator. The optimal M
Publikováno v:
steel research international. 83:55-82
The threedimensional flow field of molten steel in an 80ton single snorkel vacuum refining furnace has been mathematically simulated to attain the optimal configuration and operation parameters, such as the bottom blowing Ar flow rate, the eccentric
Publikováno v:
Applied Mechanics and Materials. :284-287
The effect of sodium sulfate on the dispersion of polycarboxylate superplasticizer (PC) was studied in this paper. The study of fluidity of cement paste shown that the carboxyl groups did more to improve the fluidity of cement paste than the sulfonic
Effects of Chemical Structure on Adsorption of Polycarboxylate Superplasticizers on Cement Particles
Publikováno v:
Applied Mechanics and Materials. :185-189
Superplasticizers with various of length of side chains, density of the carboxylic (-COO-) and sulfonic groups (-SO3-) have been synthesized based on different monomers and ratios. The effects of these structural factors on the properties of cement p