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In this study, the effects of aqueous extracts from Zygophyllum fabago L. on two plant phytopathogenic fungal species (namely, Fusarium oxyosporum f. sp. melonis and Pythium aphanidermatum) were studied under laboratory conditions. The plant extracts (10% w/v) were prepared by using deionized water and fresh tissues. Dilutions (2, 4, 6, and 8% w/v) were obtained to test their effect on the mycelial growth of the phytopathogenic species. Additionally, the recovery of the fungi after their exposure to the Z. fabago extract was analyzed. The plant extracts inhibited the growth of F. oxyosporum and P. aphanidermatum (the maximum mean inhibition that was recorded with the 10% w/v extracts was 42.9% and 85.3%, respectively). A second series of experiments demonstrated the existence of residual effects in both species. The amount of residual inhibition by the 10% w/v extracts was 28.6% in F. oxyosporum and 53.8% in P. aphanidermatum. A dose–response was clearly observed in P. aphanidermatum, while an increase in extract concentration was not associated with a significantly greater reduction in the growth of F. oxyosporum. These findings give insights into the potential of Z. fabago as a growth inhibitor of F. oxyosporum and P. aphanidermatum, thus suggesting an interesting potential role for this common weed as a source of natural fungicides. 相似文献
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Comparison of the effects of topical application of UMF20 and UMF5 manuka honey with a generic multifloral honey on wound healing variables in an uncontaminated surgical equine distal limb wound model 
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下载免费PDF全文 AS Tsang AJ Dart A Sole‐Guitart CM Dart NR Perkins LB Jeffcott 《Australian veterinary journal》2017,95(9):333-337
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A recently developed rocket immunoelectrophoretic method was used in order to estimate the variation of Rubisco protein content in fifteen (15) tobacco cultivars. The optimum time of harvest for the highest Rubisco concentration was also determined. Since polyphenols (PP) present a problem in Rubisco extraction, the polyphenol content of the same 15 tobacco genotypes was also measured, in order to identify tobacco cultivars with high Rubisco and low polyphenol content. Rubisco concentration reached its maximum value in 2-month-old plants and declined thereafter. At this stage significant genetic variation was recorded for Rubisco and Polyphenol content in crude leaf extracts. Four of the genotypes (KII-S2 , TA21, N34/4, and MA/ 13β) were found to be promising in respect to high Rubisco and low PP concentration. No relationship between total protein content and Rubisco concentration was recorded. Crude extract was satisfactorily preserved at the temperature of -70°C. 相似文献
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Two switchable, mesoscopically periodic materials were created by combining crystalline colloidal array (CCA) self-assembly with the temperature-induced volume phase transition of poly(N-isopropylacrylamide) (PNIPAM). Body-centered-cubic CCAs of hydrated, swollen PNIPAM particles Bragg-diffract infrared, visible, and ultraviolet light weakly, whereas arrays of compact shrunken particles diffract efficiently. A tunable diffracting array was also created by embedding a CCA of polystyrene spheres within a PNIPAM hydrogel that swells and contracts with temperature; thus the array lattice constant varies with temperature, and the diffracted wavelength was thermally tunable across the entire visible spectrum. These materials may find applications in many areas of optics and materials science. 相似文献
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I. FRANCISCO J. A. SÁNCHEZ F. J. CORTIÑAS R. FRANCISCO E. MOCHALES M. ARIAS P. MULA J. L. SUÁREZ P. MORRONDO P. DÍEZ‐BAÑOS R. SÁNCHEZ‐ANDRADE A. PAZ‐SILVA 《Equine veterinary journal》2009,41(7):713-715
The aim of this study was to assess, by a clinical trial, the efficacy of an ivermectin‐based pour‐on treatment against gastrointestinal parasitic nematodes in naturally infected horses using 2 groups of mature indigenous Pura Raza Galega grazing mares. Faecal and blood samples were collected individually over a 21 week period. Faeces were analysed by the coprological flotation, sedimentation and migration techniques. Changes in circulating blood cells were monitored over the study period. The administration of the ivermectin suppressed the eggelimination of ascarids and pinworms throughout the study and no strongyle‐eggs were observed in the treatment group between the 3rd and 10th weeks. The numbers of red cells increased significantly after the anthelmintic therapy, and a statistical reduction in circulating leucocytes was recorded. No side effects were observed. The pour‐on ivermectin formulation was highly successful against gastrointestinal nematodes and appears to be a useful therapeutic routine for large groups of horses. 相似文献