Investigation of hemostatic effect of Spleeninvigorating,Qi-replenishing and Bloodarresting Formula on simvastatin-induced zebrafish hemorrhage model

Blood-arresting Formula on simvastatin-induced zebrafish hemorrhage model compared with that of the Heat-clearing and Blood-cooling Formula.Methods:AB strain wild type zebrafish were treated with 0.5 mM simvastatin for 24 hours to establish the zebrafish hemorrhage model.Under strictly blind experimental conditions,the zebrafish were then treated with experimental agents in different concentration within the maximum non-lethal dose.The intervention effect of the Spleen-invigorating,Qi-replenishing and Blood-arresting Formula was comprehensively assessed by examining the main observational parameters such as the bleeding reduction rate and hemostatic rate while referring to the additional parameters such as blood flow,improvement rate of blood flow,velocity of movement,improvement rate of motion under spleen-qi deficiency.Results:Hemostatic effect:The bleeding rate and hemostatic rate in the zebrafish were respectively,30%,15%,45%,40%and 60%,80%,40%,47%when equal concentration of 500 mg/mL,1000 mg/mL were used.This showed that the experimental herbs B1 was superior to B2 in decreasing the bleeding rate and improving hemostatic effect in the zebrafish.Improvement of blood flow:With equal concentration,the experimental herb B1 was superior to B2 in increasing the blood flow and improvement rate of blood flow in hemorrhagic zebrafish.Promotion of the improvement of motion:With equal concentration of 500 mg/mL and 1000 mg/mL,the experimental herb B1 was superior to B2 in promoting the velocity of motion in the zebrafish and promoting the improvement rate of motion.Conclusion:The manifestations of simvastatin-induced zebrafish hemorrhage are basically similar to that of failure of the spleen to control blood in human beings.The Spleeninvigorating,Qi-replenishing and Blood-arresting Formula has good hemostatic effect on simvastatin-induced hemorrhage in the zebrafish.It also boasts the functions of improving blood flow and velocity of motion in the hemorrhagic zebrafish.Such a conclusion provides the experimental basis for the treatment of the syndrome of failure of the spleen to control blood by this formula.

Plate reinforced square hollow section X-joints subjected to in-plane moment

The static test of 13 square hollow section(SHS) X-joints with different β and different types of plate reinforcement under in-plane moment in brace was carried out. Experimental test schemes, failure modes of specimens, moment-vertical displacement curves, moment-deformation of the chord, and strain strength distribution curves were presented. The effect of β and plate reinforcement types on in-plane flexural property of SHS X-joints was studied. Results show that punching shear of chord face disappears, brace material fracture appears and concave and convex deformation of chord decrease when either collar plates or doubler plates were welded on chord face. Moment-vertical displacement curves of all specimens have obvious elastic, elastic-plastic and plastic stages. As β increases, the in-plane flexural ultimate capacity and initial stiffness of joints of the same plate reinforcement type increase, but ductility of joints decreases. With the same β, the in-plane flexural initial stiffness and ultimate capacity of doubler plate reinforced joints, collar plate reinforced joints, and unreinforced joints decrease progressively. Thickness of reinforcement plate has no obvious effect on in-plane flexural initial stiffness and ultimate capacity of joints. As thickness of reinforcement plate increases, the ductility of reinforced X-joints decreases. The concave and convex deformation of every specimen has good symmetry;as β increases, the yield and ultimate deformation of chord decrease.