The effect of ultraviolet(UV)radiation and biocide benzalkonium chloride(BKC)on fungal-induced corrosion of AA7075 induced by Aspergillus terreus(A.terreus)was deeply studied using analysis of biological activity,surf...The effect of ultraviolet(UV)radiation and biocide benzalkonium chloride(BKC)on fungal-induced corrosion of AA7075 induced by Aspergillus terreus(A.terreus)was deeply studied using analysis of biological activity,surface analysis,and electrochemical measurements.Results demonstrated that the planktonic and sessile spore concentrations decline by more than two orders of magnitude when UV radiation and BKC are combinedly used compared with the control.UV radiation can inhibit the biological activity of A.terreus and influence the stability of passive film of AA7075.Except for direct disinfection,the physical adsorption of BKC on the specimen can effectively inhibit the attachment of A.terreus.The combination of UV radiation and BKC can much more effectively inhibit the corrosion of AA,especially pitting corrosion,due to their synergistic effect.The combined application of UV radiation and BKC can be a good method to effectively inhibit fungal-induced corrosion.展开更多
In order to explore whether the endophytic Trichoderma strain P3.9 of loquat has an adverse effect on indigenous fungi in loquat rhizosphere soil, the quantitative change of aboriginal fungi is determined by dish dilu...In order to explore whether the endophytic Trichoderma strain P3.9 of loquat has an adverse effect on indigenous fungi in loquat rhizosphere soil, the quantitative change of aboriginal fungi is determined by dish dilution and plate colony-counting method with time changing in one season. The results showed that after the inoculation of endophytic Trichoderma strain P3.9, the total number of indigenous fungi in loquat rhizosphere soil had an obviously downward trend in contrast with the control which was without inoculation. For treatment groups, 5~60 d after inoculation, the number of indigenous fungi showed a cyclic upward-downward trend at a 10-d interval except for the insignificant changes from 35 to 40 d;60~90 d after inoculation, the upward-downward trend repeated at a 30-d interval. For the control group, the number of indigenous fungi first presented a downward-upward trend every 15 d during the period of 5~50 d, and then an upward-downward trend from the period of 50~70 d and the 75~85 d, and lastly continuous growth from 85 to 90 d;particularly, it did not vary greatly from 70 to 75 d. In general, the quantity of indigenous fungi is unstable in the control group which fluctuates more significantly than in the treatment group. The number of indigenous fungi in the treatment group was significantly lower than that in the control group. The Trichoderma strain P3.9 can inhibit indigenous fungi in loquat rhizosphere soil effectively.展开更多
基金supported by the Guangdong Basic and Applied Basic Research Foundation,China(No.2023A1515012146)the National Natural Science Foundation of China(No.52271083)+1 种基金the Fundamental Research Funds for the Central Universities,China(No.22qntd0801)the Shanghai Engineering Technology Research Centre of Deep Offshore Material,China(No.19DZ2253100)。
文摘The effect of ultraviolet(UV)radiation and biocide benzalkonium chloride(BKC)on fungal-induced corrosion of AA7075 induced by Aspergillus terreus(A.terreus)was deeply studied using analysis of biological activity,surface analysis,and electrochemical measurements.Results demonstrated that the planktonic and sessile spore concentrations decline by more than two orders of magnitude when UV radiation and BKC are combinedly used compared with the control.UV radiation can inhibit the biological activity of A.terreus and influence the stability of passive film of AA7075.Except for direct disinfection,the physical adsorption of BKC on the specimen can effectively inhibit the attachment of A.terreus.The combination of UV radiation and BKC can much more effectively inhibit the corrosion of AA,especially pitting corrosion,due to their synergistic effect.The combined application of UV radiation and BKC can be a good method to effectively inhibit fungal-induced corrosion.
文摘In order to explore whether the endophytic Trichoderma strain P3.9 of loquat has an adverse effect on indigenous fungi in loquat rhizosphere soil, the quantitative change of aboriginal fungi is determined by dish dilution and plate colony-counting method with time changing in one season. The results showed that after the inoculation of endophytic Trichoderma strain P3.9, the total number of indigenous fungi in loquat rhizosphere soil had an obviously downward trend in contrast with the control which was without inoculation. For treatment groups, 5~60 d after inoculation, the number of indigenous fungi showed a cyclic upward-downward trend at a 10-d interval except for the insignificant changes from 35 to 40 d;60~90 d after inoculation, the upward-downward trend repeated at a 30-d interval. For the control group, the number of indigenous fungi first presented a downward-upward trend every 15 d during the period of 5~50 d, and then an upward-downward trend from the period of 50~70 d and the 75~85 d, and lastly continuous growth from 85 to 90 d;particularly, it did not vary greatly from 70 to 75 d. In general, the quantity of indigenous fungi is unstable in the control group which fluctuates more significantly than in the treatment group. The number of indigenous fungi in the treatment group was significantly lower than that in the control group. The Trichoderma strain P3.9 can inhibit indigenous fungi in loquat rhizosphere soil effectively.
