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您的检索式：作者名="Paula ROJAS"
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| 1 | Ag-Zn粉末的机械合金化和随后的热处理(英文)显示文摘研究了在机械合金化过程中Ag和Zn以及随后的热处理中的显微组织演变。机械合金化在SPEX8000D铣床中进行。采用X射线衍射(XRD)﹑透射电子显微镜(TEM)和扫描电子显微镜(SEM)观察样品的显微组织。使用差示扫描量热计(DSC)研究样品的热性能。结果表明,在合金化初期的碾磨过程中能观察到ε,β,β′,α固溶体和剩余的Zn。随后,ε,β,β′和Zn相消失,α固溶体中的Zn浓度剧烈升高。在碾磨7.2ks后,机械合金化过程达到稳定状态。在此期间,α固溶体的组分和晶粒尺寸保持不变。后续热处理表明α固溶体也能够通过机械合金化结合热处理得到。最后,为了得到α固溶体,根据碾磨和热处理过程中样品的微观组织演变,提出一个最佳的工艺路线。 | Danny GUZMN Oscar RIVERA Claudio AGUILAR Stella ORDOEZ Carola MARTíNEZ Daniel SERAFINI Paula ROJAS | 2013 | Transactions of Nonferrous Metals Society of China2013，23，7： | 2 |
| 2 | Evaluation of a Fermented Millet Product of Bacillus subtilis ATCC 55033 as Potential in Biocontrol of Bacteriosis(Xanthomonas axonopodis)in Gulupa(Passiflora edulis Sims)显示文摘The“oil stain disease”has become a phytosanitary status that involves economic losses for farmers who produce gulupa(Passiflora edulis Sims).For this reason,this research aimed to evaluate the biocontrol activity of Bacillus subtilis ATCC 55033 in a culture medium based on fermented millet as a biocontrol product of the disease.Initially,metabolite production of seven strains of B.subtilis and a reference strain B.s(ATCC 55033)was evaluated;in addition,the in vitro antagonistic ability was evaluated against Xanthomonas axonopodis.Two experiments were performed under in vitro conditions:(1)study of the presence of halos of hemolysis due to metabolite production;(2)analysis of the antagonistic ability by using double layer.It was observed that concerning the average,a number five times bigger of halos of hemolysis and 10 times bigger halos of inhibition in vitro on the growth of X.axonopodis in the strains B.s(ATCC 55033)and B.s TB2 over other strains.Subsequently,the evaluation was performed under greenhouse conditions,based on a randomized block design,in which two treatments were applied over the soil:(1)application of the fermented medium based on millet with B.s ATCC 55033,24 h before X.a inoculation;(2)application of 5 d post-inoculation.It was observed that the treatment,previous infective process,obtained an average percentage of severity equal to 42.044%.In addition,after the evaluation month,a foliage restoration was presented.In conclusion,it is suggested that these products could act as inducers in the plant systemic resistance to trigger defense responses to infection of X.a. | Benitez Hernández Solange Viviana Aragón Rojas Stephania Novoa Sindy Madrigal Sandra Núñez Paula Gómez Paola Montenegro Monica Ordoñez Elizabeth Lancheros Graciela Sánchez Ligia | 2020 | Journal of Agricultural Science and Technology(A)2020，10，4： | 0 |
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