Chitosan oligomers （average Dp-4） are known for their antifungal activity and wood decay resistance. These oligomers are susceptible to moisture, and promote yeast growth upon air exposure after a sufficient length ...Chitosan oligomers （average Dp-4） are known for their antifungal activity and wood decay resistance. These oligomers are susceptible to moisture, and promote yeast growth upon air exposure after a sufficient length of time. Chitosan oligomers of three different states viz. completely dried, freshly prepared and highly viscous form, were prepared to compare their in-vitro antifungal activities against three brown-rot fungi, two sapstain and one mould fungus using agar nutrient medium. Additionally, a mixture of chitosan oligomers and boric acid was used for wood treatment. The nutrient medium bioassay results show that all states of chitosan oligomers inhibited the growth of tested basidiomycetes fungi, but not sapstain and mould fungi. Subsequently, wood decay results confirm antifungal activity of chitosan oligomers plus boron against basidiomycetes, but highlighted their leachability upon water exposure.展开更多
Pesticide plays a vital role in agricultural, industrial and residemial pest control. In recent years the ‘pesticide problem＇ has been the focus of public interest because these chemicals have a very important role ...Pesticide plays a vital role in agricultural, industrial and residemial pest control. In recent years the ‘pesticide problem＇ has been the focus of public interest because these chemicals have a very important role in agriculture but these chemicals also act like endocrine disruptor. Experiments were carried out on 12 weeks old mice with 30 ± 2 gm. b.w. Endosulfan were administered at 3 mg/kg b.w daily by gavage method for five weeks followed by selenium treatment at 10 μg/kg.b.w./day for five weeks. 9 ＋ 2 arrangment were clearly observed in control group mice with well structured dynein and nexin arm while Endosulfan treated group show depolymerised microtubule and 9 ＋ 1 arrangment with degenerated mitochondria. While selenium treated group shows restoration of 9 ＋ 2 arrangement of microtubule. It is evident from study that endosulfan causes depolymerisation of microtubule while selenium administered group show normal polymerized microtubule and restores normal fertility in mice.展开更多
文摘Chitosan oligomers （average Dp-4） are known for their antifungal activity and wood decay resistance. These oligomers are susceptible to moisture, and promote yeast growth upon air exposure after a sufficient length of time. Chitosan oligomers of three different states viz. completely dried, freshly prepared and highly viscous form, were prepared to compare their in-vitro antifungal activities against three brown-rot fungi, two sapstain and one mould fungus using agar nutrient medium. Additionally, a mixture of chitosan oligomers and boric acid was used for wood treatment. The nutrient medium bioassay results show that all states of chitosan oligomers inhibited the growth of tested basidiomycetes fungi, but not sapstain and mould fungi. Subsequently, wood decay results confirm antifungal activity of chitosan oligomers plus boron against basidiomycetes, but highlighted their leachability upon water exposure.
文摘Pesticide plays a vital role in agricultural, industrial and residemial pest control. In recent years the ‘pesticide problem＇ has been the focus of public interest because these chemicals have a very important role in agriculture but these chemicals also act like endocrine disruptor. Experiments were carried out on 12 weeks old mice with 30 ± 2 gm. b.w. Endosulfan were administered at 3 mg/kg b.w daily by gavage method for five weeks followed by selenium treatment at 10 μg/kg.b.w./day for five weeks. 9 ＋ 2 arrangment were clearly observed in control group mice with well structured dynein and nexin arm while Endosulfan treated group show depolymerised microtubule and 9 ＋ 1 arrangment with degenerated mitochondria. While selenium treated group shows restoration of 9 ＋ 2 arrangement of microtubule. It is evident from study that endosulfan causes depolymerisation of microtubule while selenium administered group show normal polymerized microtubule and restores normal fertility in mice.
