The revaluation of medicinal plants in the veterinary pharmacopoeia is essential for the development of livestock in Burkina Faso. In order to justify the use of C. sesamoides and S. hermonthica in the treatment of ga...The revaluation of medicinal plants in the veterinary pharmacopoeia is essential for the development of livestock in Burkina Faso. In order to justify the use of C. sesamoides and S. hermonthica in the treatment of gastrointestinal parasitosis of small ruminants, a quantification of phenolic compounds as well as antioxidant activity and acute toxicité evaluation of both plants were performed. Acute toxicity was evaluated by administering a single dose of 2000 mg/kg body weight of aqueous extract of both plants to mice. The highest total polyphenol content for C. sesamo?des was obtained in the ethyl acetate fraction with 47.236 ± 2.57 mgEAG/100mg while that of S. hermonthica was 74.871 ± 2.57 mgEAG/100mg obtained with the n-butanol Fraction. The dichloromethane extract of S. hermonthica obtained the highest total flavonoid content with 7.31 ± 0.48 mgEQ/100 while the highest total flavonoid content of C. sesamo?des was obtained with ethyl acetate fraction with 5.4273 ± 0.35 mgEQ/100mg. The aqueous extract of C. sesamo?des obtained the highest content of condensed tannins with 3.028 ± 0.13 mgEAT/100mg. Both plant’s extracts did not show any signs of toxicity in NMRI mice after administration of the dose of 2000 mg/kg. The antioxidant activity by DPPH, FRAP and ABTS methods was good compared to those of Quercetin and Trolox taken as standard.展开更多
The glutaraldehyde crosslinked pericardium has been used in bioprosthetic valves for about 50 years.However,problems such as glutaraldehyde residue and calcification still exist in current commercial products.Non-glut...The glutaraldehyde crosslinked pericardium has been used in bioprosthetic valves for about 50 years.However,problems such as glutaraldehyde residue and calcification still exist in current commercial products.Non-glutar aldehyde crosslinked dry valve is an important strategy to solve those problems.In this study,a non-glutaraldehyde crosslinked dry biological valve material was obtained by the combined crosslinking of carbodimide(EDC)and polyphenol.The results showed that the comprehensive properties of EDC and curcumin crosslinked pericardium were superior to glutaraldehyde crosslinked pericardium,including unfolding property,anti-calcification,cytotoxicity,anticoagulant properties,mechanical properties,enzyme degradation resistance and thermal shrinkage temperature.EDC and curcumin crosslinked dry pericardium could flatten after being folded at 40℃ for 3 days while glutaraldehyde crosslinked pericardium could not.The calcification of pericardium treated with EDC and curcumin was 1.21±0.36 mg/g in rats after 60 days'subdermal implantation,much lower than that of glutaraldehyde treated control group(22.06±3.17 mg/g).展开更多
The photocatalytic hydrogen production from aqueous methanol solution using titanium dioxide （TiO2） was investigated in the addition of metal particles including copper, lead, tin, and zinc. The results show that on...The photocatalytic hydrogen production from aqueous methanol solution using titanium dioxide （TiO2） was investigated in the addition of metal particles including copper, lead, tin, and zinc. The results show that only the addition of copper particles enhances the hydrogen production. The copper usage and reaction temperature were further optimized for TiO2/Cu photocatalyts. Under the optimal conditions, the hydrogen production using TiO2/Cu as photocatalysts is approxi- mately 68 times higher than that obtained with only TiO2.展开更多
文摘The revaluation of medicinal plants in the veterinary pharmacopoeia is essential for the development of livestock in Burkina Faso. In order to justify the use of C. sesamoides and S. hermonthica in the treatment of gastrointestinal parasitosis of small ruminants, a quantification of phenolic compounds as well as antioxidant activity and acute toxicité evaluation of both plants were performed. Acute toxicity was evaluated by administering a single dose of 2000 mg/kg body weight of aqueous extract of both plants to mice. The highest total polyphenol content for C. sesamo?des was obtained in the ethyl acetate fraction with 47.236 ± 2.57 mgEAG/100mg while that of S. hermonthica was 74.871 ± 2.57 mgEAG/100mg obtained with the n-butanol Fraction. The dichloromethane extract of S. hermonthica obtained the highest total flavonoid content with 7.31 ± 0.48 mgEQ/100 while the highest total flavonoid content of C. sesamo?des was obtained with ethyl acetate fraction with 5.4273 ± 0.35 mgEQ/100mg. The aqueous extract of C. sesamo?des obtained the highest content of condensed tannins with 3.028 ± 0.13 mgEAT/100mg. Both plant’s extracts did not show any signs of toxicity in NMRI mice after administration of the dose of 2000 mg/kg. The antioxidant activity by DPPH, FRAP and ABTS methods was good compared to those of Quercetin and Trolox taken as standard.
基金This work was supported by the National Natural Science Foundation of China(No.31700833).
文摘The glutaraldehyde crosslinked pericardium has been used in bioprosthetic valves for about 50 years.However,problems such as glutaraldehyde residue and calcification still exist in current commercial products.Non-glutar aldehyde crosslinked dry valve is an important strategy to solve those problems.In this study,a non-glutaraldehyde crosslinked dry biological valve material was obtained by the combined crosslinking of carbodimide(EDC)and polyphenol.The results showed that the comprehensive properties of EDC and curcumin crosslinked pericardium were superior to glutaraldehyde crosslinked pericardium,including unfolding property,anti-calcification,cytotoxicity,anticoagulant properties,mechanical properties,enzyme degradation resistance and thermal shrinkage temperature.EDC and curcumin crosslinked dry pericardium could flatten after being folded at 40℃ for 3 days while glutaraldehyde crosslinked pericardium could not.The calcification of pericardium treated with EDC and curcumin was 1.21±0.36 mg/g in rats after 60 days'subdermal implantation,much lower than that of glutaraldehyde treated control group(22.06±3.17 mg/g).
文摘The photocatalytic hydrogen production from aqueous methanol solution using titanium dioxide （TiO2） was investigated in the addition of metal particles including copper, lead, tin, and zinc. The results show that only the addition of copper particles enhances the hydrogen production. The copper usage and reaction temperature were further optimized for TiO2/Cu photocatalyts. Under the optimal conditions, the hydrogen production using TiO2/Cu as photocatalysts is approxi- mately 68 times higher than that obtained with only TiO2.
