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排序方式: 共有206条查询结果,搜索用时 15 毫秒
61.
Claudia Mello Ribeiro Veruska Maia da Costa Jonas Lotufo Brant de Carvalho Rodrigo Guerrero Mendes Paula Andrea de Santis Bastos Satie Katagiri Marcos Amaku 《Zoonoses and public health》2020,67(6):629-636
Brazilian spotted fever (BSF) is a highly lethal disease caused by Rickettsia spp. and is transmitted by ticks of the genus Amblyomma. Understanding the epidemiology of BSF in each region can help direct health surveillance actions. The objective of this study was to determine the spatial distribution of vectors and the incidence of BSF in the state of São Paulo. Spatial analysis included confirmed BSF cases between 2009 and 2019; occurrences were registered by municipalities of the state. There were 752 confirmed BSF cases, with incidences ranging between 0.01 and 10.37/10,000 inhabitants. Moran's Global Index for BSF was 0.20 (p = .001), which was indicative of spatial dependence. Moran's map located a cluster of 20 high priority municipalities for BSF and showed that Amblyomma sculptum is the vector involved in Rickettsia rickettsii transmission in these locations. Spatial analysis identified clusters formed by 47, 20 and seven significant municipalities for the presence of A. sculptum, Amblyomma aureolatum and Amblyomma ovale vectors, respectively. Surveillance and prevention actions are necessary in areas that are at high risk for BSF and in areas where the presence of vectors was significant. 相似文献
62.
AE Pashitski A Gurevich AA Polyanskii DC Larbalestier A Goyal ED Specht DM Kroeger JA DeLuca JE Tkaczyk 《Science (New York, N.Y.)》1997,275(5298):367-369
Magneto-optical imaging was used to visualize the inhomogeneous penetration of magnetic flux into polycrystalline TlBa2Ca2Cu3Ox films with high critical current densities, to reconstruct the local two-dimensional supercurrent flow patterns and to correlate inhomogeneities in this flow with the local crystallographic misorientation. The films have almost perfect c-axis alignment and considerable local a- and b-axis texture because the grains tend to form colonies with only slightly misaligned a and b axes. Current flows freely over these low-angle grain boundaries but is strongly reduced at intermittent colony boundaries of high misorientation. The local (<10-micrometer scale) critical current density Jc varies widely, being up to 10 times as great as the transport Jc (scale of approximately 1 millimeter), which itself varies by a factor of about 5 in different sections of the film. The combined experiments show that the magnitude of the transport Jc is largely determined by a few high-angle boundaries. 相似文献
63.
The changes in color of sand dunes from white to yellow or red is often interpreted to signify their age or their source materials. In this study we demonstrate the effect seasonal inter-dune freshwater ponds have on the bleaching of the color of sand dunes by iron reduction in the anaerobic conditions they create. By combining spectral measurements of field samples of dune sand together with the analysis of satellite images covering three dune fields in NE Brazil (Lençóis Maranhenses, Jericoacoara and Canoa Quebrada) we demonstrate its existence in the field. In areas where ponds cover 41% of the dune field (as in Lençóis Maranhenses) an almost total bleaching in the color of the sand occurs after which the dunes remain white with no relation to distance from the coastline. In areas with less ponds (e.g. Jericoacoara or Canoa Quebrada) dune whitening is less active, and there are areas where dune rubification occurs. As this process may have occurred in other dune fields during past climate conditions that may have been different from current ones, interpretations of dunes age based on their color should be handled with care. 相似文献
64.
Felipe Farias Pereira da Câmara Barros Pedro Paulo Maia Teixeira Luciana Cristina Padilha-Nakaghi Ricardo Andres Ramirez Uscategui Marina Ragagnin Lima Victor José Correia Santos Kayan da Cunha Rossy Luísa Pucci Bueno Borges Marcia Rita Fernandes Machado Wilter Ricardo Russiano Vicente 《Reproduction in domestic animals》2020,55(4):442-447
We tested FSHp, eCG and FSHp + eCG to establish ovum pick-up (OPU) and in vitro maturation method in spotted paca. Eight healthy adult females were subjected to each of four treatments to stimulate ovarian follicular growth. All females were subjected to a hormonal protocol using a single dose of 45 mg of injectable progesterone and single intramuscular injection of 0.075 mg d-cloprostenol on day 6. Ovarian stimulation was carried out as follows: in Group TFE (FSHp and eCG), animals were treated with a single dose of 80 mg of FSHp and 200 IU of eCG intramuscularly on day 6 after the application of progesterone; in Group TF (FSHp), they were treated with a single dose of 80 mg of FSHp intramuscularly on day 6 after application of progesterone; in Group treatment eCG, they were treated with 200 IU of eCG intramuscularly on day 6 after application of progesterone; and in Group TC (saline solution), 1 ml of saline solution was administered to control does. The OPU was performed between 22 and 26 hr after gonadotropin treatments. All recovered oocytes were placed into maturation media and incubated for 24 hr. There were no differences among the mean number of observed follicles, aspirated follicles and oocytes recovered per treatment. Oocyte maturation rates did not differ among groups, except, TF and treatment eCG oocytes had greater maturation rates than TC oocytes. In this study, gonadotropin administration failed to superovulate treated does and increase oocyte retrieval efficiency. Despite the feasibility of the procedure, further studies are needed to develop and refine hormonal protocols for oocyte recovery and in vitro maturation in this species. 相似文献
65.
Eliene Matos Silva Natoniel Franklin de Melo Alessandra Monteiro Salviano Mendes Francisco Pinheiro de Araújo Leonor Costa Maia 《Journal of plant nutrition》2015,38(3):431-442
The Caatinga is a unique biome that encompasses nearly 11% of Brazil's territory and contains diverse vegetation composed of trees and bushes that have been scarcely studied from the economic perspective. In this context, Passiflora setacea may constitute a strategic alternative for agriculture because it produces fruit that has commercial potential and is tolerant to some diseases. Some species of Passiflora show more robust growth when associated with arbuscular mycorrhizal fungi (AMF) and are dependent on mycorrhization. In this study, the response of P. setacea to phosphate (P) fertilization and mycorrhization with Claroideoglomus etunicatum was evaluated. The experimental design included eight replicates of four randomized treatments: non-inoculated plants (NI), plants fertilized with phosphorus (P), mycorrhized plants (AMF), and plants that were both fertilized and mycorrhized (P+AMF). The plant height, leaf number, leaf area, fresh biomass (FB), and dry biomass (DB) of the shoots and roots, nutrient content, mycorrhizal colonization (MC), and the number of glomerospores (NG) in the rhizosphere were evaluated. The MC and the NG were reduced by phosphate fertilization. The development of the mycorrhized plants was significantly better than the NI and P treated plants for all of the variables tested. Inoculation with C. etunicatum promoted the growth of P. setacea seedlings even in the absence of phosphate fertilization, reducing production costs and strengthening the potential of P. setacea as a viable agricultural alternative for the semiarid region. 相似文献
66.
Camila Pegoraro Liliane Marcia Mertz Luciano Carlos da Maia Cesar Valmor Rombaldi Antonio Costa de Oliveira 《Journal of Crop Science and Biotechnology》2011,14(2):85-95
Abiotic and biotic stress conditions cause extensive losses to maize production, mainly due to protein dysfunction in these
conditions. In higher plants, the occurrence of heat-shock proteins (HSPs) in response to different environmental stresses
is a universal phenomenon and has been well documented. Many studies have demonstrated that most HSPs are involved in many
regulatory pathways, act as molecular chaperones for other cell proteins, and have strong cytoprotective effects. Although
many functional roles for HSPs are known, the mechanisms for these multiple functions are not entirely understood. Here we
reviewed the correlation among HSP genes/proteins and plant tolerance, especially maize, in different environmental stresses. Due to the low availability of
information regarding the expression of HSP genes in response to different stresses in maize, we decided to mine databases in order to generate new insights related
to this topic. 相似文献
67.
Martins Tda M da Paixão TA Costa ÉA Pires Ade C Santos RL Borges ÁM 《Veterinary immunology and immunopathology》2011,139(2-4):277-281
Toll-like receptors (TLRs) and β-defensins are important components of the innate immune system. This study aimed to evaluate endometrial mRNA levels of TLRs (1/6, 2, 4, and 5) and β-defensin 5 in Holstein cows by quantitative real time RT-PCR. Uterine biopsies were performed from 6 to 12 h after parturition, and cows were divided into two groups: (i) cows with placental retention and clinical signs of uterine infection until 45 days postpartum (n=10) or (ii) cows with normal puerperium (n=10). All cows had detectable levels of TLRs and β-defensin 5 mRNAs, but these levels did not differ between groups (P>0.05). Levels of TLR4 mRNA had a positive and significant correlation with the time required for uterine involution in both groups. 相似文献
68.
de Souza Anderson Fernando Pascual Carolina Jubran Maia Beatriz Tofani do Valle De Zoppa André Luis 《Veterinary research communications》2022,46(1):283-288
Veterinary Research Communications - This study aimed to evaluate the distribution of dye at two perineural injection sites of the palmar/plantar nerves and describe their anatomical variations of... 相似文献
69.
Langer Gitta Jutta Fuchs Sebastian Osewold Johannes Peters Sandra Schrewe Falk Ridley Maia Kätzel Ralf Bubner Ben Grüner Jörg 《植物病害和植物保护杂志》2022,129(6):1285-1295
Journal of Plant Diseases and Protection - European ash dieback caused by the alien, invasive ascomycete species Hymenoscyphus fraxineus currently represents, along with its side effects, the... 相似文献
70.
Maia Fradkin María Rosa Ferrari Víctor Ferreira Ezequiel Martín Grassi Eduardo José Greizerstein Lidia Poggio 《Genetic Resources and Crop Evolution》2012,59(2):231-237
Triticum–Thinopyrum amphiploids arose from the need to obtain forage grasses highly resistant to pest, drought, soil salinity and frost and they
can be used as efficient bridges to transfer desired genes from wheatgrass species to wheat. One of them is trigopiro SH16
INTA, it was introduced in Argentina in 1947 but its genomic composition was unknown. The aim of this work was to determine
the chromosome number and genomic and chromosome composition of trigopiro SH16 INTA in order to use it in breeding programs.
The simultaneous use of the in situ hybridization technique with different probes (genomic DNA of Th. ponticum (Podp.) Barkworth et D.R. Dewey, pSc119.2 and pAs1) allowed us to conclude that the chromosome number of trigopiro SH16 is
2n = 42 and the genome composition would be: 14 chromosomes of the B genome, the 2D and 4D chromosome pairs of wheat, 14 chromosomes
of the J genome of Thinopyrum and the remaining chromosomes probably belong to the A genome of wheat. 相似文献