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排序方式: 共有383条查询结果,搜索用时 31 毫秒
61.
G. La Rosa Y. T. R. Proroga D. De Medici F. Capuano M. Iaconelli S. Della Libera E. Suffredini 《Food and environmental virology》2018,10(1):127-131
Shellfish samples (n = 384) from production areas, water samples from the same areas (n = 39) and from nearby sewage discharge points (n = 29) were analyzed for hepatitis E virus (HEV) by real-time and nested RT-PCR. Ten shellfish samples (2.6%) and five seawater samples (12.8%) tested positive for HEV; all characterized strains were G3 and showed high degree of sequence identity. An integrated surveillance in seafood and waters is relevant to reduce the risk of shellfish-associated illnesses. 相似文献
62.
G. Bonanno Ferraro P. Mancini M. Divizia E. Suffredini S. Della Libera M. Iaconelli G. La Rosa 《Food and environmental virology》2018,10(4):386-390
Human Cosavirus (HCoSV) is a newly discovered virus whose role in human enteric diseases is still unknown. In Italy, the prevalence and genetic diversity of HCoSV are unexplored. One hundred forty-one raw sewage samples collected throughout Italy were screened for HCoSV by RT-nested PCR. HCoSV was detected in 25.5% of samples. Species A, C, and D, and a potentially new species were detected. Our results show a significant circulation and heterogeneity of HCoSV in Italy. 相似文献
63.
Mancini Pamela Bonanno Ferraro Giusy Suffredini Elisabetta Veneri Carolina Iaconelli Marcello Vicenza Teresa La Rosa Giuseppina 《Food and environmental virology》2020,12(1):68-74
Food and Environmental Virology - Salivirus (SalV) is a newly discovered virus associated to acute gastroenteritis in humans. In Italy, its prevalence and genetic diversity is unknown. To reduce... 相似文献
64.
Franco Andreone Gonçalo M. Rosa Jean Noël Angelica Crottini Miguel Vences Christopher J. Raxworthy 《Die Naturwissenschaften》2010,97(6):525-543
We describe a new mantelline frog of the genus Blommersia found in rainforest in North East Madagascar, from the protected areas of Ambatovaky, Betampona, Masoala, and Zahamena. Blommersia angolafa n.sp. is a small frog, with a body size of 17–21 mm, expanded finger and toe tips, and colouration ranging from yellow to
dark brown, with pale-bluish spots on the flanks and light tips of fingers and toes. A peculiar aspect characterising this
new species is its novel life history and reproductive mode. Both sexes live and breed in a phytotelmic habitat of water accumulated
within fallen prophylls and fallen leaf sheaths of at least three species of Dypsis palms. Within these phytotelmata, egg laying and complete larval development occur. Thus, B. angolafa n.sp. represents a new evolutionary lineage of Malagasy frogs in which phytotelmy is known. Up to now, reproduction in phytotelmata
in Malagasy frogs has been reported for many cophyline microhylids, most species of Guibemantis, Mantella laevigata, and possibly in a still-undescribed species belonging to the genus Spinomantis. We consider the reproductive mode of B. angolafa as a derived character, having evolved from the more typical reproduction in lentic water bodies. The general scarcity of
lentic habitats in Malagasy rainforests may have provided the conditions that favoured the evolution of this phytotelmic breeding
strategy. The new species, being specialised to a habitat represented by a few selected Dypsis species, potentially suffers the selective exploitation of these palms. 相似文献
65.
66.
67.
Teresa Pamatz-Bolaños Denis A. Cabrera-Munguia Horacio González Rosa E. Del Río José L. Rico Gabriela Rodríguez-García 《International Journal of Green Energy》2018,15(8):465-472
Caesalpinea eriostachys seed oil, as a source of triglycerides with potential application for biodiesel production in Mexico is introduced. Its lipid profile obtained by Gas Chromatography-Mass Spectrometry (GC-MS) revealed saturated and unsaturated glycerol esters as the constituents. Therefore, heterogeneous and homogeneous catalyzed transesterification reactions were assayed employing ZnAl hydrotalcites and KOH, as the catalysts, respectively. The transesterification reactions yielded 59% for Zn/Al(2), 79% for Zn/Al(4), and 90% for KOH, depicting typical behavior, as in biodiesel production data from literature, where Zn-Al hydrotalcites or KOH were assayed. The caloric, density, viscosity values, and fatty acid methyl esters profile from reaction products were concordant to EN 14214, suggesting C. eriostachys as a promising feedstock for biodiesel production. 相似文献
68.
Susana García-Alonso Rosa María Pérez-Pastor María Luisa Sevillano-Castaño 《Environmental science and pollution research international》1999,6(3):147-150
The focus of this study was to characterize the concentration levels of selected PCBs and compare them to compiled data in
order to contribute to the international database. The sampling site is located in the outskirts of Madrid and can be considered
an open urban area. 32 samples of air were taken from February 1998 to June 1998 by using a high volume air sampler. Glass
fiber filters and polyurethane foam (PUF) were used to collect the paniculate and gas phase material, respectively.
PUF plugs were Soxhlet extracted and filters were ultrasonically extracted by using pesticide-grade hexane and dichloromethane,
respectively. The cleanup procedure was carried out on a florisil column with hexane and hexane/dichloromethane as elution
solvents.
GC/MS in a selected ion monitoring mode was used for quantification and 29 selected PCBs congeners were analyzed. 相似文献
69.
70.
Miguel Costa Leal Patricia N. Pochelon Teresa Lopes da Silva Alberto Reis Rui Rosa Ricardo Calado 《Marine Biology》2013,160(4):763-772
Offspring quality of decapod crustaceans has been widely studied, with special emphasis on the sources of variability determining embryonic and larval quality. Nevertheless, maternal provisioning has commonly been overlooked as a potential source of offspring within-brood variability. In the present study, the existence of variable maternal provisioning was assessed through the analysis of the fatty acid (FA) profile of newly extruded embryos from different regions of the brooding chamber of Homarus gammarus. Significant differences in the FA profile of embryos sampled from different pleopods and sides of the brooding chamber were recorded. Significant deviations of the overall mean of each surveyed female were also observed for essential FA, particularly 20:4n-6, 20:5n-3 and 22:6n-3. Lipid energy available to fuel embryogenesis also varied among embryos sampled from different regions of the brooding chamber. Results suggest variable female investment at oocyte production, which may be amplified during the incubation period of developing embryos by differential lipid catabolism. For the first time, maternal provisioning is evidenced as an additional source for within-brood variability in the FA profile of embryos. 相似文献