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| 1 | Chemical-Structural Changes of Organic Matter in a Semi-Arid Soil After Organic Amendment显示文摘A 9-month incubation experiment using composted and non-composted amendments derived from vine pruning waste and sewage sludge was carried out to study the effects of the nature and stability of organic amendments on the structural composition of organic matter (OM) in a semi-arid soil.The changes of soil OM,both in the whole soil and in the extractable carbon with pyrophosphate,were evaluated by pyrolysis-gas chromatography and chemical analyses.By the end of the experiment,the soils amended with pruning waste exhibited less organic carbon loss than those receiving sewage sludge.The non-composted residues increased the aliphatic-pyrolytic products of the OM,both in the whole soil and also in the pyrophosphate extract,with the products derived from peptides and proteins being significantly higher.After 9 months,in the soils amended with pruning waste the relative abundance of phenolic-pyrolytic products derived from phenolic compounds,lignin and proteins in the whole soil tended to increase more than those in the soils amended with sewage sludge.However,the extractable OM with pyrophosphate in the soils amended with composted residues tended to have higher contents of these phenolic-pyrolytic products than that in non-composted ones.Thus,despite the stability of pruning waste,the composting of this material promoted the incorporation of phenolic compounds to the soil OM.The pyrolytic indices (furfural/pyrrole and aliphatic/aromatic ratios) showed the diminution of aliphatic compounds and the increase of aromatic compounds,indicating the stabilization of the OM in the amended soils after 9 months.In conclusion,the changes of soil OM depend on the nature and stability of the organic amendments,with composted vine pruning waste favouring humification. | C.NICOLS G.MASCIANDARO T.HERNNDEZ C.GARCIA | 2012 | Pedosphere2012，22，3： | 3 |
| 2 | 查看详情显示文摘 | F.G.Caballero C.Garcia Mateo M.J.Santofimia M.K.Miller C.Garcia de Andrés | | 0，，： | 1 |
| 3 | Tracing Changes in the Microbial Community of a Hydrocarbon-Polluted Soil by Culture-Dependent Proteomics显示文摘Hydrocarbon contamination may affect the soil microbial community, in terms of both diversity and function. A laboratory experiment was set-up, with a semi-arid control soil and the same soil but artificially contaminated with diesel oil, to follow changes in the dominant species of the microbial community in the hydrocarbon-polluted soil via proteomics. Analysis of the proteins extracted from enriched cultures growing in Luria-Bertani (LB) media showed a change in the microbial community. The majority of the proteins were related to glycolysis pathways, structural or protein synthesis. The results showed a relative increase in the complexity of the soil microbial community with hydrocarbon contamination, especially after 15 days of incubation. Species such as Ralstonia solanacearum, Synechococcus elongatus and different Clostridium sp. were adapted to contamination, not appearing in the control soil, although Bacillus sp. dominated the growing in LB in any of the treatments. We conclude that the identification of microbial species in soil extracts by culture-dependent proteomics is able to partially explain the changes in the diversity of the soil microbial community in hydrocarbon polluted semi-arid soils, but this information is much more limited than that provided by molecular methods. | F.BASTIDA C.NICOLS J.L.MORENO T.HERNNDEZ C.GARCIA | 2010 | Pedosphere2010，20，4： | 1 |
| 4 | 采用改进冲击摆锤评价7075-T651合金焊缝的断裂能(英文)显示文摘采用改进冲击摆锤,研究7075-T651合金焊缝夏比试样的力-时间曲线。考虑力-时间曲线和恒冲击速率,获得不同区域的断裂能。与焊缝金属(7.88 J)和基体金属(5.37 J(纵向)和7.37 J(横向))的断裂能相比,热影响区的断裂能更高(33.6 J),这是由于焊接过程中,热力学不稳定的η′相发生组织转变。焊缝区的断裂能比基体合金的高,这是由于焊接凝固过程中产生大量孔洞。为从力-时间曲线中获得动态屈服力,对焊缝、热影响区和基体合金的屈服强度进行近似处理。断裂形貌表明,基体合金在纵向方向上呈现晶间断裂,而在横向方向上,主要为脆性(解理)断裂并伴有韧性断裂特征。而焊缝区和热影响区则呈现韧性断裂。 | R.R.AMBRIZ D.JARAMILLO C.GARCIA F.F.CURIEL | 2016 | Transactions of Nonferrous Metals Society of China2016，26，4： | 0 |
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