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排序方式： 共有85条查询结果，搜索用时 31 毫秒
41.
Felisbina L. Queiroga Isabel Pires Luís Lobo Carlos S. Lopes 《Research in veterinary science》2010,88(3):441-445
Immunohistochemical detection of Cyclooxygenase (Cox)-1 and -2 enzymes in canine mammary tumours (CMT) has recently been described. However, the prognostic value of their expression needs to be established. The aim of this study was to investigate Cox (-1 and -2) prognostic value in malignant CMT by evaluating its correlation with clinicopathological parameters (tumour size, histological type, necrosis, lymph node metastasis) and with Disease Free Survival (DFS) and Overall Survival (OS). Twenty seven female dogs with malignant tumours were included. Cox-2 expression was associated with lymph node metastasis at surgery time, development of distant metastasis during follow-up (p = 0.038), DFS (p = 0.03) and OS (p = 0.04). Multivariate survival analysis showed that Cox-2 did not retain its significance as an independent prognostic factor. For Cox-1 expression, no statistically significant association was observed. Present study suggests the usefulness of testing Cox-2 specific inhibitors as part of an adjuvant therapy in female dogs with malignant mammary neoplasias. 相似文献
42.
Inés García de la Banda Carmen Lobo Mariana Chabrillón Juan Manuel León‐Rubio Salvador Arijo Gema Pazos Luisa María Lucas Miguel Ángel Moriñigo 《Aquaculture Research》2012,43(5):662-669
Probiotics are currently being supplemented to cultured fish due to their benefits for fish performance. Herein, we tested the health protection and nutritional effects of probiotic Shewanella putrefaciens (Pdp11 strain), both fresh and lyophilized cells, on Senegalese sole (Solea senegalensis) juveniles. Pdp11 was incorporated into fish feed at concentration of 109 cells g?1, and then provided to juvenile sole for 2 months. Growth rates were significantly higher in fish fed the fresh probiotic compared with fish fed the control diet. Growth of fish receiving lyophilized bacteria was not improved when compared with controls. Body compositions (protein, total lipids and fatty acids profile) were similar for each dietary treatment. At the end of the study, fish were challenged by intraperitoneal inoculation with a pathogenic strain of Photobacterium damselae subsp. piscicida. Relative percentages of survival (RPS) ranged between 25% and 43.8% for fish receiving both probiotic supplemented diets. Both fresh and lyophilized Pdp11 cells conferred protection against P. damselae subsp. piscicida. However, only fresh Pdp11 enhanced Senegal sole performance. These findings should be taken into account for industry purposes in which lyophilized Pdp11 might be easier to manage. 相似文献
43.
S. T. Tapia-Paniagua P. Díaz-Rosales J. M. León-Rubio I. García de La Banda C. Lobo F. J. Alarcón M. Chabrillón P. Rosas-Ledesma J. L. Varela I. Ruiz-Jarabo S. Arijo M. A. Esteban E. Martínez-Manzanares J. M. Mancera M. C. Balebona M. A. Mori?igo 《Aquaculture International》2012,20(6):1025-1039
The application of probiotics on aquatic animals is increasing for a better fish welfare status as well as an environment-friendly activity which are actual demands of modern aquaculture industry. A bacterium from skin mucus of healthy gilthead seabream (Sparus aurata L.) has been isolated and identified as Shewanella putrefaciens Pdp11. Different studies have been done to know its application as probiotic in the Senegalese sole and gilthead seabream farming. This article reviews the studies carried out with this probiotic microorganism focusing on the current knowledge of its in vitro and in vivo mechanisms of action. The results suggested that the probiotic S. putrefaciens Pdp11, due to its beneficial effects, could be used in the aquaculture activity of both species. 相似文献
44.
Lobo L Pinheiro-Vieira A Gomes JL Canada N Ribeiro L Costa PD Oliveira P Bussadori C 《Journal of the American Animal Hospital Association》2012,48(1):54-59
A 1 yr old male Estrela mountain dog was evaluated as a part of a screening program for dilated cardiomyopathy. The dog came from a family with a history of dilated cardiomyopathy but was asymptomatic. Occult dilated cardiomyopathy and sino-atrial dysfunction were diagnosed based on echocardiography and electrocardiography. These two disorders may be associated given that related dogs have been diagnosed with the same disorders. The dog has remained asymptomatic for 4 years following initial evaluation. 相似文献
45.
Águeda González María del Mar Gil-Diaz María del Carmen Lobo 《Journal of Soils and Sediments》2017,17(5):1403-1412
Purpose
The objective of the study was to evaluate the tolerance of barley (Hordeum vulgare) and wheat (Triticum aestivum) in soil contaminated with different concentrations of Cd and Cr, the effect of these metals on some physiological characteristics and the biomass produced in order to assess their potential application in phytoremediation of contaminated soils.Materials and methods
A greenhouse experiment using two cultivars of barley, CB502 and Pedrezuela, and one of wheat, Albares, was conducted. The pots were watered with different concentrations of Cd or Cr during the period of plant growth. Cellular membrane damage, content and fluorescence of chlorophyll, and plant biomass were evaluated. After harvesting, the content of metals in the roots, shoots and grains was analysed as well as the available metal concentration in soil samples.Results and discussion
The results show that the Cd treatments did not significantly affect the growth and physiology of the plants, but they were affected by the Cr treatments. At the highest concentration of Cr, the decrease in chlorophyll content compared to the control was 44, 77 and 83 % for the CB502 and Pedrezuela barleys and the Albares wheat respectively. A reduction in biomass was also observed (74, 81 and 85 % respectively). The amount of Cd and Cr accumulated in the root was higher than that accumulated in the aerial part for the three cultivars. The barleys accumulated the highest amount of metal in the roots. The transfer factor was lower in barley than in the wheat for both metals.Conclusions
Cadmium treatments do not affect plant development. In the case of Cr, plant development and physiological traits were significantly affected. For the highest concentration of Cr, the CB502 barley had the highest tolerance index, 26 %, and the Albares wheat had the lowest one, 15 %. The two barleys were more effective in phytoremediation of soil contaminated with Cd or Cr than the wheat, presenting a higher tolerance to these metals in the assayed conditions.46.
Luma Castro de Souza Luana Moraes da Luz Jéssica Taynara da Silva Martins Cândido Ferreira de Oliveira Neto Juscelino Gonçalves Palheta Tamires Borges de Oliveira Ediane Conceição Alves Risely Ferraz de Almeida Raimundo Leonardo Lima de Oliveira Roberto Cezar Lobo da Costa Nariane Quaresma Vilhena 《林业研究》2018,29(6):1475-1479
The objective of this work was to evaluate the effect of different water deficiency and rehydration levels on the concentrations of osmoregulators in two plant species (Hymenaea courbaril and H. Stigonocarpa) in the Amazon. We adopted a 2 × 5 × 5 factorial system, referring to 2 species (H. courbaril and H. stigonocarpa) and 5 stages of hydration and rehydration. The five hydration and rehydration stages were established in: (1) Control treatment E0; (2) Plants with 13 days of stress after incubation—E13; (3) Plants with 26 days of stress E26; (4) The plants that were established after 26 days after incubation and rehydrated for two days (RD2); (5) rehydrated for two days (RD4). The plants that were established after 26 days after incubation and rehydrated for four days. The experiment totaled fifty young plants with five replicates. Biochemical measurements were performed at the beginning of the experiment (E0) at 13 (E13) and 26 (E26) days after the water stress, in which the plants were rehydrated, repeating the analyses after two (RD2) and four (RD4) days. Both species increased the sucrose concentration by 18%, with a decrease of 52% in starch content. The RD4 time presented the highest mean starch concentration (0.19 mmol g?1 of the residue for H. courbaril and 0.27 mmol g?1 of residue for H. stigonocarpa). Increased proline concentrations were recorded for controls until RD2 for both species. For glycine betaine, the highest increases in treatments E26 and RD2 were observed for the H. courbaril species. Our rehydration period was not sufficient for total recovery of pre-stress concentrations of all studied solutes. 相似文献
47.
Albin Lobo Erik Dahl Kjær Ditte Christina Olrik Lars-Göran Stener Jon Kehlet Hansen 《Annals of Forest Science》2018,75(2):62
Key message
Large genetic variation was found in Prunus avium L. populations from the northern parts of the species distribution range. The ranking of genotypes in terms of growth was stable when tested at three trial sites within the northern parts of the species distribution range.Context
Peripheral populations especially those in the leading edge are isolated from rest of the areas in the species distribution range. This can make them less genetically diverse yet genetically distinct from the rest of the populations in the species distribution range. Evaluation of their genetic diversity is thus crucial in understanding the local adaptation potential of a species.Aims
We investigated the genetic diversity and genotype by environment interaction at the northern parts of the distribution range of P. avium.Methods
Quantitative genetic variation of growth, stem form, and spring phenology were assessed in progenies from 93 plus trees of P. avium selected from 43 locations at the north of the species distribution range in Sweden and tested at two Swedish sites and one Danish site.Results
We find large quantitative genetic variation in growth and phenology at the northern part of the distribution range of P. avium. Only a limited genotype by environment interaction was observed with no clear indication of local adaptation at the northern parts of the species distribution.Conclusion
We conclude that P. avium harbors a high level of genetic diversity at the north of its distribution range. Present patterns therefore reflect more likely the recent introduction of the species and dispersal dynamics rather than a long-term loss of diversity along South-North ecological clines during the Holocene. With no indications of genetic depletion in growth or phenology, the gene pool in the breeding program is considered suitable for the future propagation of the species in the tested area.48.
Lobo Gaspar Pereira Luís F. Gonçalves José F. M. Peixoto Maria J. Ozório Rodrigo O. A. 《International Aquatic Research》2018,10(4):321-331
The current study evaluated the effects of dietary seaweed supplementation in European seabass juveniles (Dicentrarchus labrax) subjected to rearing temperature and salinity oscillations, simulating natural variations in pond aquaculture conditions. Two experimental diets where formulated: a control diet (CTRL) with no supplementation and one supplemented with 7.5% seaweed mix (SW 2.5% Fucus sp., 2.5% Gracilaria sp. and 2.5% Ulva sp.). Seabass from both dietary groups (40.7 g initial body weight) was subjected to either combined salinity and temperature oscillations, or to fixed conditions. Growth performance, innate immune, and oxidative stress responses were evaluated. Results showed that seaweed supplementation had no significant effect on the analyzed parameters. However, environmental oscillations revealed significant effects on growth performance and oxidative stress response. Fish subjected to salinity and temperature oscillations had a significantly lower weight gain and daily growth index than those subjected to fixed conditions, regardless of dietary treatment. Total glutathione, oxidized glutathione, and catalase increased in fish subjected to oscillatory conditions. Lysozyme and peroxidase were not influenced by either diet or environmental conditions. In conclusion, this particular dietary seaweed mix supplementation did not mitigate the negative effects of environmental oscillations on growth performance and innate immune responses in European seabass.
相似文献49.
OBJECTIVE: To assess the nutritional status of the Andean population of Puna and Quebrada of Humahuaca, Jujuy, using anthropometric measurements. DESIGN AND SUBJECTS: A cross-sectional nutritional survey was carried out in a representative sample (n = 1236) of individuals from these regions. Children aged 2-9 years, adolescents (10-17 years) and adults (>or=18 years; pregnant and lactating women excluded) were considered. Height-for-age, weight-for-height and body mass index (BMI) were calculated in children and adolescents and compared with World Health Organization/National Center for Health Statistics/Centers for Disease Control and Prevention reference standards using Z-scores or percentiles, in order to assess the prevalence of stunting, wasting/thinness and excess weight. In adults, BMI, waist circumference (WC) and waist-to-hip (WHR) ratio were used to identify obesity and central adiposity. RESULTS: Stunting (height-for-age Z-score <-2 standard deviations) and obesity (BMI >or= 95th percentile) were found to be major nutritional problems in children and adolescents. Stunting was prevalent in 10.7% of children and 12.4% of adolescents; 8.2% of children and 3.5% of adolescents were obese. Adults were short (mean: 155.8 cm) and values of overweight (32.3%), obesity (18.3%) and central adiposity (mean WC: 86.5 cm) were high. Older adults and those with higher economic development showed higher prevalence of obesity and central adiposity. CONCLUSIONS: The present population may be at the early stages of nutritional transition as symptoms of undernutrition and overnutrition coexist at the population level. These results suggest that rates of growth retardation may be decreasing owing to improved nutritional conditions; however, this could be accompanied by a sharp increase in the prevalence of other diet-related chronic diseases. 相似文献
50.
Various urban and industrial sewage sludges were applied to a soil at two doses (50 and 100 t ha−1 y−1) during eight years in a field experiment. The soil was analysed at two depths (0–30 and 30–60 cm) for extractable cadmium and nickel. In general these trace metal increased with dosage. However, cadmium formed complexes with organic matter and nickel bound to iron and manganese oxides. Hence, the available fractions of these metals constituted a small proportion of the total content. The results obtained show a low risk of contamination due to the available fractions of these metals at sludges dosages of up to 100 t ha−1. Copyright © 2001 John Wiley & Sons, Ltd. 相似文献