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| 1 | The effects of dietary supplementation with mushroom or selenium enriched mushroom powders on the growth performance and intestinal health of post-weaned pigs显示文摘Background There is an urgent need to identify natural bioactive compounds that can enhance gastrointestinal health and promote pig growth performance in the absence of pharmacological levels of zinc oxide(ZnO).The objectives of this study were to:1)compare the effects of mushroom powder supplemented with inorganic selenium(inSeMP)to mushroom powder enriched with organic selenium(orgSeMP)to pharmacological levels of ZnO on growth performance and faecal scores(FS)for the first 21 d post-weaning(Period 1);and 2)compare the molecular and microbial effects of inSeMP and orgSeMP in these pigs on d 39 post-weaning(Period 2).Methods In Period 1,pigs(3 pigs/pen;8 pens/treatment)were assigned to:(1)basal diet(control);(2)basal diet+zinc oxide(ZnO)(3100 mg/kg d 1–14,1550 mg/kg d 15–21);(3)basal diet+mushroom powder supplemented with inorganic selenium(inSeMP)containing selenium(selenite)content of 0.3 mg/kg feed;(4)basal diet+mushroom powder enriched with organic selenium(orgSeMP)containing selenium(selenocysteine)content of 0.3 mg/kg feed.Mushroom powders were included at 6.5 g/kg of feed.Results In Period 1,there was no effect of diets on average daily gain(ADG)and gain:feed(G:F)ratio(P>0.05).The orgSeMP supplemented pigs had a lower average daily feed intake(ADFI)compared to all other groups(P<0.05).The ZnO supplemented pigs had reduced FS compared to the basal and mushroom group,while the orgSeMP supplemented pigs had lower FS compared to the basal group during the 21 d experimental period(P<0.05).In Period 2,there was no effect of diets on ADFI,ADG and G:F ratio(P>0.05).The orgSeMP supplementation increased the caecal abundance of bacterial members of the Firmicutes and Bacteroidetes phylum,including Lactobacillus,Agathobacter,Roseburia,and Prevotella and decreased the abundance of Sporobacter compared to the basal group,while inSeMP increased the caecal abundance of Prevotella and decreased the caecal abundance of Sporobacter compared to the basal group(P<0.05).Dietary supplementation with inSeMP increased expression of TLR4 and anti-inflammatory cytokine gene IL10 and decreased nutrient transporter gene FABP2 compared to the orgSeMP group(P<0.05).Conclusion OrgSeMP is a novel and sustainable way to incorporate selenium andβ-glucans into the diet of weaned pigs whilst improving FS and modulating the caecal microbiota. | Alison Dowley Torres Sweeney Eadaoin Conway Stafford Vigors Marion T.Ryan Supriya Yadav Jude Wilson John V.O’Doherty | 2023 | Journal of Animal Science and Biotechnology2023，14，3： | 1 |
| 2 | Germanium-rich 'starburst' cores in silica-based optical fibres fabricated by Modified Chemical Vapour Deposition显示文摘 | P.McNamara K.J.Lyytikainen T.Ryan I.J.Kaplin S.P.Ringer | | 0，，： | 1 |
| 3 | Testing allometric scaling relationships in plant roots显示文摘Background:Metabolic scaling theory predicts that plant productivity and biomass are both size-dependent.However,this theory has not yet been tested in plant roots.Methods:In this study,we tested how metabolic scaling occurs in plants using a comprehensive plant root dataset made up of 1016 observations from natural habitats.We generated metabolic scaling exponents by logtransformation of root productivity versus biomass.Results:Results showed that the metabolic scaling exponents of fine root(<2mm in diameter)productivity versus biomass were close to 1.0 for all ecosystem types and functional groups.Scaling exponents decreased in coarse roots(>2mm in diameter).Conclusions:We found isometric metabolic scaling in fine roots,a metabolically active organ similar to seedlings or saplings.Our findings also indicate a shift in metabolic scaling during plant development.Overall,our study supports the absence of any unified single constant scaling exponent for metabolism-biomass relationships in terrestrial plants,especially for forests with woody species. | Qiang Deng Zhiyou Yuan Xinrong Shi T.Ryan Lock Robert L.Kallenbach | 2020 | Forest Ecosystems2020，7，4： | 0 |
| 4 | 满足OEM新规格的风力涡轮机油的鉴定显示文摘作为一种可再生能源,风力涡轮机数量增长很快。OEM在过去的几年里提出了应用于风力涡轮机齿轮和轴承的润滑油新标准,这些新标准同时被应用于传统的工业齿轮油中。这不但明显提高了传统工业齿轮的用油水平,也提高了开发新技术的费用。 | Helen T.Ryan Michael Reinehr Mark Devlin | 2005 | 石油商技2005，23，2： | 0 |
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