ABSTRACT
Objective To introduce and analyze the current user security authentication system in the campus network and point out the secure problems and hidden dangers of the correspondence entities in the campus network. Methods The authentication technologies and protocols in the TCP/IP network model were compared. It was proposed that the campus network security authentication solution should include access control in data link layer, connection control in network layer and unified authentication in application layer. Results The solution could improve the campus network authentication security rank. Conclusion The security and reliability of the network system are enhanced.
ABSTRACT
Objective: To explore the effect of different selenium sources on the function of humoral immunity and antioxidant capacity of rabbits. Method: Thirty-five rabbits were randomly divided into seven groups and vaccinated with rabbit haemorrhagic disease (RHD) dead vaccine. At the same time, rabbits were injected respectively with sodium selenite (0.1 mg/kg bw and 0.3 mg/kg bw), Kappa-selenocanageenan (0.1 mg/kgbw and 0.3 mg/kg bw), DL-selenomethionine (0.1 mg/kg bw and 0.3 mg/kg bw) and physiological saline as control. Antibody against RHD, activity of GSH-Px and content of MDA in rabbit serum were detected on 0, 10, 20, 30d after inoculation. Results: Sodium selenite (0.1 mg/kg bw), Kappa- selenocanageenan (0.3 mg/kg), and DL-selenomethionine (0.3mg/kg bw) could significantly increase the level of RHD antibody. Sodium selenite (0.3 mg/kg bw) and Kappa-selenocanageenan (0.3mg/kg bw) improved the activity of GSH-Px. All selenium groups could decrease serum MDA, but Kappa-selenocanageenan (0.3 mg/kg bw) showed the best effect. Conclusion: Kappa-selenocanageenan (0.3 mg/kg bw) was better than the lower dosage and other selenium sources in the effects on the function in humoral immunity and antioxidant capacity of rabbits.