Liposome encapsulation and EDTA formulation of dsRNA targeting essential genes increase oral RNAi‐caused mortality in the Neotropical stink bug Euschistus heros     

Nathaly L Castellanos  Guy Smagghe  Rohit Sharma  Eugênio E Oliveira  Olivier Christiaens 《Pest management science》2019,75(2):537-548

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Surgical Procedures of the Thorax     

David E. Anderson  Guy St. Jean 《Veterinary Clinics of North America: Food Animal Practice》2008

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Effect of reducing dietary mineral content on growth performance, water intake, excreta dry matter content and blood parameters of broilers     

Ziaei N  Guy JH  Edwards SA  Blanchard PJ  Ward J  Feuerstein D 《British poultry science》2008,49(2):195-201

1. The objective of this study was to investigate whether it is possible to reduce phosphorus (P) excretion by feeding a lower level of dietary P than that currently recommended, without compromising welfare, and whether this is sensitive to the level of dietary calcium (Ca). 2. A randomised complete block design was used with a total of 224 1-d-old male chicks of a commercial genotype in two batches. Chicks had a 10-d adaptation period. After this, they were moved to cages and allocated to one of 4 dietary treatments (4 and 3 birds per cage in batch 1 and 2, respectively). A standard level of Ca and P (8.3 and 6.6 g/kg, respectively) was compared with three lower levels of Ca (7.3, 6.3 and 5.3 g/kg) all at the same reduced level of P (5.5 g/kg). Records were made of live weight of birds on an individual basis and feed and water consumption on a cage basis. Every 7 d, the dry matter (DM) content of a sample of mixed excreta from each cage was measured. Birds were slaughtered and samples taken for analysis of plasma mineral content, retention of N, Ca and P and tibia bone strength. 3. The initial reduction in dietary mineral level did not adversely affect performance or bone strength. However, decreasing dietary Ca level below 7.3 g/kg, at constant P, led to reduced feed consumption and bone strength. Dietary treatment had no significant overall effect on water intake, water : feed ratio, excreta DM content, Ca and P retention or metabolisability of DM. There was no significant correlation between mean plasma Ca or P level and DM content of rectal digesta. 4. In conclusion, reducing dietary P from 6.6 to 5.5 g/kg to reduce potential environmental impact of broiler production had an adverse effect on bird welfare when the level of Ca was reduced below 7.3 g/kg, as a result of decreased feed intake in the early growth period and reduced skeletal strength.  相似文献   

Lack of prolonged activity of lavender essential oils as acaricides against the poultry red mite (Dermanyssusgallinae) under laboratory conditions     

George DR  Callaghan K  Guy JH  Sparagano OA 《Research in veterinary science》2008,85(3):540-542

Managing the poultry red mite, Dermanyssus gallinae (De Geer) by conventional means (i.e., synthetic acaricides) has become increasingly problematic. As a possible alternative, research has identified several plant essential oils that are toxic to D. gallinae. However, essential oils are highly volatile and any acaricidal effect they exert could be short-lived in practice.This study investigated the short-lived toxicity of six lavender essential oils to D. gallinae. In sealed Petri-dishes, mites were exposed to filter papers impregnated with essential oil at a concentration of 0.14 mg/cm³. When filter papers were used immediately after impregnation, 66–90% D. gallinae mortality was observed after 24 h, depending upon the essential oil used. If impregnated filter papers were left in a fume cupboard for 24 h prior to use, mortality rates of D.gallinae fell to 11% or less.  相似文献   

Association of circulating microRNA‐122 and microRNA‐29a with stage of fibrosis and progression of chronic hepatitis in Labrador Retrievers     

Manabu Sakai  Bart Spee  Guy C. M. Grinwis  Louis C. Penning  Monique E. van Wolferen  Luc J. W. van der Laan  Hille Fieten 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2019,33(1):151-157

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Modified stall‐side crossmatch for transfusions in horses     

Pauline Casenave  Mathilde Leclere  Guy Beauchamp  Marie‐Claude Blais 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2019,33(4):1775-1783

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Reaction norm analysis of pig growth using environmental descriptors based on alternative traits     

Sarita Zhe Ying Guy  Li Li  Peter Campbell Thomson  Susanne Hermesch 《Zeitschrift für Tierzüchtung und Züchtungsbiologie》2019,136(3):153-167

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Domestication of plants for sustainable agriculture in drylands: Experience from the Negev Desert     

Oren Shelef  Ofer Guy  Elaine Solowey  Michael Kam  A. Allan Degen  Shimon Rachmilevitch 《Arid Land Research and Management》2016,30(2):209-228

With globalization in the last century, introduction of exotic plant species for commercial use has become more accessible. Such attempts may involve extreme land changes. We stress that domestication of native species should be preferred to the introduction of exotic species. We took the initial steps in domesticating several species by examining commercial uses and studying aspects of plant physiology. The following desert plants were considered: Bassia indica, for salt phytoremediation and for livestock feed; Commiphora gileadensis, as an agent against cancer cells; Artemisia sieberi and A. judaica, as plants with allopathic traits; Ficus palmate, as a stand for fig plantation; Balanites aegyptiaca, as a medicinal plant and for other uses; Portulaca oleracea and Scorzonera judaica, as food crops with added values; and Pistacia atlantica, as rootstock for P. vera.  相似文献   

Models with only two predictor variables can accurately predict seed yield in diploid and tetraploid red clover     

Tim Vleugels  Bob Ceuppens  Gerda Cnops  Peter Lootens  Frederik R. D. van Parijs  Guy Smagghe  Isabel Roldán-Ruiz 《Euphytica》2016,209(2):507-523

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Interactive effects of organic acids in the rhizosphere     

Eva Oburger  Guy J.D. Kirk  Markus Puschenreiter 《Soil biology & biochemistry》2009,41(3):449-679

Organic acids released into the rhizosphere may perform many beneficial functions to the plant including metal detoxification and enhancement of nutrient acquisition. Typically, these organic acids are studied in isolation; however, roots simultaneously exude a cocktail of organic acids and other substances, and their combined impact on rhizosphere processes may be quite different. It has been hypothesized that some exudates may play secondary roles (e.g. inhibitors of microbial activity, blockage of sorption sites), which might enhance the longevity and nutrient-mobilization capacity of others. Here we investigated how the decomposition, sorption and P-solubilizing effects of citrate, malate and oxalate are affected by the presence of malonate and shikimate. We found that in a range of agricultural soils the decomposition of citrate, malate and oxalate was rapid, but not influenced by the presence of large quantities of shikimate or malonate. This suggests that the individual organic acids are taken up by different transport mechanisms or components of the microbial community. At large concentrations, malonate decreased sorption of citrate, malate and oxalate on the soil, whilst shikimate had little effect. The capacity of citrate, malate and oxalate to desorb P was significantly greater in cocktails containing malonate compared with the single organic acid; no effect was seen with shikimate. We conclude that neither malonate nor shikimate at realistic concentrations will significantly affect the biodegradation of citrate, malate or oxalate in the rhizosphere, and while malonate did enhance P desorption, this effect is additive rather than synergistic. Overall, we found little evidence that malonate and shikimate act as secondary regulators of citrate, malate and oxalate behavior in soil.  相似文献