Indeed,medicinal importance of honey has been documented in the world's oldest medical literatures,and since the ancient times,it has been known to possess antimicrobial property as well as wound-healing activity....Indeed,medicinal importance of honey has been documented in the world's oldest medical literatures,and since the ancient times,it has been known to possess antimicrobial property as well as wound-healing activity.The healing property of honey is due to the fact that it offers antibacterial activity,maintains a moist wound condition,and its high viscosity helps to provide a protective barrier to prevent infection.Its immunomodulatory property is relevant to wound repair too.The antimicrobial activity in most honeys is due to the enzymatic production of hydrogen peroxide.However,another kind of honey,called non-peroxide honey(viz.,manuka honey),displays significant antibacterial effects even when the hydrogen peroxide activity is blocked.Its mechanism may be related to the low pH level of honey and its high sugar content(high osmolality) that is enough to hinder the growth of microbes.The medical grade honeys have potent in vitro bactericidal activity against antibiotic-resistant bacteria causing several life-threatening infections to humans. But,there is a large variation in the antimicrobial activity of some natural honeys,which is due to spatial and temporal variation in sources of nectar.Thus,identification and characterization of the active principle(s) may provide valuable information on the quality and possible therapeutic potential of honeys(against several health disorders of humans),and hence we discussed the medicinal property of honeys with emphasis on their antibacterial activities.展开更多
Two series of cationic polyacrylamide of quaternary pyridine salt-type were synthesized, which have different cationic degrees and molecular weights respectively. The antibacterial property of QPAV was investigated, t...Two series of cationic polyacrylamide of quaternary pyridine salt-type were synthesized, which have different cationic degrees and molecular weights respectively. The antibacterial property of QPAV was investigated, the influence of various factors on the antibacterial property was examined by using E. Coli as the disease-leading bacterium and the method of plate counting live bacterium. The antibacterial mechanism of QPAV was studied by using the method of measuring the activity of β-D-galactosidase. The experiment results show that QPAV possesses an excellent antibacterial property. The higher the cationic degree of QPAV is, the stronger the antibacterial property is. In certain range of molecular weight, the higher molecular weight of QPAV is, the better the antibacterial effect is. The pH value also influences the antibacterial property of QPAV. The antibacterial effect of QPAV is based on sterilization action certainly and is not only a restraining action.展开更多
文摘Indeed,medicinal importance of honey has been documented in the world's oldest medical literatures,and since the ancient times,it has been known to possess antimicrobial property as well as wound-healing activity.The healing property of honey is due to the fact that it offers antibacterial activity,maintains a moist wound condition,and its high viscosity helps to provide a protective barrier to prevent infection.Its immunomodulatory property is relevant to wound repair too.The antimicrobial activity in most honeys is due to the enzymatic production of hydrogen peroxide.However,another kind of honey,called non-peroxide honey(viz.,manuka honey),displays significant antibacterial effects even when the hydrogen peroxide activity is blocked.Its mechanism may be related to the low pH level of honey and its high sugar content(high osmolality) that is enough to hinder the growth of microbes.The medical grade honeys have potent in vitro bactericidal activity against antibiotic-resistant bacteria causing several life-threatening infections to humans. But,there is a large variation in the antimicrobial activity of some natural honeys,which is due to spatial and temporal variation in sources of nectar.Thus,identification and characterization of the active principle(s) may provide valuable information on the quality and possible therapeutic potential of honeys(against several health disorders of humans),and hence we discussed the medicinal property of honeys with emphasis on their antibacterial activities.
文摘Two series of cationic polyacrylamide of quaternary pyridine salt-type were synthesized, which have different cationic degrees and molecular weights respectively. The antibacterial property of QPAV was investigated, the influence of various factors on the antibacterial property was examined by using E. Coli as the disease-leading bacterium and the method of plate counting live bacterium. The antibacterial mechanism of QPAV was studied by using the method of measuring the activity of β-D-galactosidase. The experiment results show that QPAV possesses an excellent antibacterial property. The higher the cationic degree of QPAV is, the stronger the antibacterial property is. In certain range of molecular weight, the higher molecular weight of QPAV is, the better the antibacterial effect is. The pH value also influences the antibacterial property of QPAV. The antibacterial effect of QPAV is based on sterilization action certainly and is not only a restraining action.
