为探讨堆肥初始物料对腐熟堆肥溶解性有机质(DOM)的Fe^(3+)生物还原强化效应的影响,本研究提取了不同物料腐熟堆肥(包括猪粪PM、鸡粪CM、蚕沙SE、木薯渣CR、厨余垃圾KW、污泥SS)及泥炭土(PS)的DOM,分析其光谱特征(紫外光谱、红外光谱和...为探讨堆肥初始物料对腐熟堆肥溶解性有机质(DOM)的Fe^(3+)生物还原强化效应的影响,本研究提取了不同物料腐熟堆肥(包括猪粪PM、鸡粪CM、蚕沙SE、木薯渣CR、厨余垃圾KW、污泥SS)及泥炭土(PS)的DOM,分析其光谱特征(紫外光谱、红外光谱和三维荧光光谱)、电子转移能力(ETC)及Fe^(3+)生物还原强化效果。结果表明:PM、CM、SE和SS中DOM含有更多的芳香结构、醌基官能团和更少的类木质素含量;CR中DOM含有更多的微生物类腐殖质组分(C2),CM和SS中DOM含有更多的类色氨酸组分(C4);6种物料堆肥DOM的电子转移能力总体略低于PS(EAC+EDC,628.42~720.57µmol·g^(-1)vs 710.37µmol·g^(-1)),其中SE>PM>CR>KW>CM>SS;SS、CM和SE中DOM在0~2 d内对Fe^(3+)的还原速率有显著的促进作用,相比于空白处理组分别提高了31.57、25.39倍和22.60倍;相关性分析表明,SUVA_(254)×C4、SUVA_(436)×C4指标与0~2 d Fe^(3+)还原速率呈显著性正相关(P=0.05),而类木质素含量与之呈显著负相关。SS、CM和SE物料的腐熟堆肥具有较多醌类结构的类色氨酸组分,使其具有较高的在Fe^(3+)/Fe^(2+)和希瓦氏菌MR-1之间的电子转移能力,从而提高Fe^(3+)生物还原强化效应。展开更多
Stretchable/flexible electronics has attracted great interest and attention due to its potentially broad applications in bio-compatible systems. One class of these ultra-thin electronic systems has found promising and...Stretchable/flexible electronics has attracted great interest and attention due to its potentially broad applications in bio-compatible systems. One class of these ultra-thin electronic systems has found promising and important utilities in bio-integrated monitoring and therapeutic devices. These devices can conform to the surfaces of soft bio-tissues such as the epidermis, the epicardium, and the brain to provide portable healthcare functionalities. Upon contractions of the soft tissues, the electronics undergoes compression and buckles into various modes, depending on the stiffness of the tissue and the strength of the interfacial adhesion. These buckling modes result in different kinds of interfacial delamination and shapes of the deformed electronics, which are very important to the proper functioning of the bio- electronic devices. In this paper, detailed buckling mechanics of these thin-film electronics on elastomeric substrates is studied. The analytical results, validated by experiments, provide a very convenient tool for predicting peak strain in the electronics and the intactness of the interface under various conditions.展开更多
文摘为探讨堆肥初始物料对腐熟堆肥溶解性有机质(DOM)的Fe^(3+)生物还原强化效应的影响,本研究提取了不同物料腐熟堆肥(包括猪粪PM、鸡粪CM、蚕沙SE、木薯渣CR、厨余垃圾KW、污泥SS)及泥炭土(PS)的DOM,分析其光谱特征(紫外光谱、红外光谱和三维荧光光谱)、电子转移能力(ETC)及Fe^(3+)生物还原强化效果。结果表明:PM、CM、SE和SS中DOM含有更多的芳香结构、醌基官能团和更少的类木质素含量;CR中DOM含有更多的微生物类腐殖质组分(C2),CM和SS中DOM含有更多的类色氨酸组分(C4);6种物料堆肥DOM的电子转移能力总体略低于PS(EAC+EDC,628.42~720.57µmol·g^(-1)vs 710.37µmol·g^(-1)),其中SE>PM>CR>KW>CM>SS;SS、CM和SE中DOM在0~2 d内对Fe^(3+)的还原速率有显著的促进作用,相比于空白处理组分别提高了31.57、25.39倍和22.60倍;相关性分析表明,SUVA_(254)×C4、SUVA_(436)×C4指标与0~2 d Fe^(3+)还原速率呈显著性正相关(P=0.05),而类木质素含量与之呈显著负相关。SS、CM和SE物料的腐熟堆肥具有较多醌类结构的类色氨酸组分,使其具有较高的在Fe^(3+)/Fe^(2+)和希瓦氏菌MR-1之间的电子转移能力,从而提高Fe^(3+)生物还原强化效应。
基金partial support of this research by the National Natural Science Foundation of China(Grants 11272260,11172022,11572022,51075327,11302038)
文摘Stretchable/flexible electronics has attracted great interest and attention due to its potentially broad applications in bio-compatible systems. One class of these ultra-thin electronic systems has found promising and important utilities in bio-integrated monitoring and therapeutic devices. These devices can conform to the surfaces of soft bio-tissues such as the epidermis, the epicardium, and the brain to provide portable healthcare functionalities. Upon contractions of the soft tissues, the electronics undergoes compression and buckles into various modes, depending on the stiffness of the tissue and the strength of the interfacial adhesion. These buckling modes result in different kinds of interfacial delamination and shapes of the deformed electronics, which are very important to the proper functioning of the bio- electronic devices. In this paper, detailed buckling mechanics of these thin-film electronics on elastomeric substrates is studied. The analytical results, validated by experiments, provide a very convenient tool for predicting peak strain in the electronics and the intactness of the interface under various conditions.
