Sixty-one Cases of Angina Pectoris due to Coronary Heart Disease Treated by External Use of the Paste of Nitrum and Realgar Powder on Zhiyang(GV 9)

In order to inquire into the therapeutic effects of Xiao Shi Xiong Huang San (硝石雄黄散the Nitrum and Realgar Powder), one of the Dunhuang Prescription, on angina pectoris due to coronary heart disease (APCHD), the authors have treated 61 cases of APCHD by externally applying paste of the powder on Zhiyang (GV 9), with another 30 cases of APCHD treated with the nitroglycerin paste on Zhiyang as the controls. The results showed that the total effective rate was 82% and markedly effective rate 31.2% in the treatment group (the Paste of Nitrum and Realgar Powder), and the total effective rate was 46.6% and markedly effective rate 23.2% in the control group (the nitroglycerin paste). The difference in therapeutic effects between the two groups was very significant (P<0.01), indicating that the therapeutic effect of the former was significantly superior to that of the latter.

Effect of polycarboxylate-type superplasticizer on the paste fluidity based on the water film thickness of flocs

The excess water film theory and the properties of flocs are integrated to examine the effect of the polycarboxylate-type superplasticizer on the paste fluidity. The theory states that excess water can surround the flocs rather than the particles and that the cell consists of a floc and a superficial water film. Experiments on limestone powder pastes were conducted to verify the theory. The superplasticizer dosage （sp%） and the water-powder ratio by volume （Vw/Vv） were systematically varied. A sedimentation balance method was used to measure the size distribution of the flocs in the limestone powder pastes. The water film thickness （WFT） of flocs was then calculated and shown to determine the paste fluidity. Based on this WFT of flocs, the effect of the sp on the paste fluidity was determined and then compared with the effect of water.