A ragtime joint     

Melinda S. Camus  Frederic S. Almy  Elizabeth A. Cienava 《Veterinary clinical pathology / American Society for Veterinary Clinical Pathology》2010,39(1):4-4

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High-fat diet reduces local myostatin-1 paralog expression and alters skeletal muscle lipid content in rainbow trout,Oncorhynchus mykiss     

Nicholas J. Galt  Jacob Michael Froehlich  Ben M. Meyer  Frederic T. Barrows  Peggy R. Biga 《Fish physiology and biochemistry》2014,40(3):875-886

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Leaching of taurine from commercial type aquaculture feeds          下载免费PDF全文

Aaron M Watson  Frederic T Barrows  Allen R Place 《Aquaculture Research》2015,46(6):1510-1517

Leaching of soluble compounds from pelleted feeds is an issue for the aquaculture industry through increased environmental impact and reduced ingestion essential components. This study was undertaken to examine the leaching rates of taurine, a non‐protein amino acid with critical physiological roles in teleosts. To this end we adapted a new liquid chromatography mass spectrometry (LC‐MS) method for quantifying taurine. Twelve different feeds (4 mm dia.) varying in protein source and taurine levels were examined. Fishmeal content ranged from 0.0% to 45.5% with taurine supplementation ranging from 0.0% to 5.0%. Taurine was extracted and quantified from individual pellets in triplicate at six time points (0, 1, 5, 10, 20 and 40 min). Leaching rates ranged from 0.026 ± 0.005 to 0.826 ± 0.121 mg min^?1 over 40 min at 27°C and were strongly correlated to initial taurine content of the feeds (for distilled water n = 12, P < 0.001, R² = 0.91 for artificial seawater, 25 ppt, n = 4, P = 0.020, R² = 0.96). Loss of taurine from feeds was 59.5 ± 16.5% after 40 min. This study shows that a significant amount of taurine is lost over time from uneaten feed and that taurine supplementation should exceed requirement levels for slow consumers or feed being delivered as multiple additions.  相似文献   

Typology of the Main Fungal Diseases Affecting Winter Wheat in the Grand Duchy of Luxembourg   总被引：2，自引：0，他引：2  

Moussa El Jarroudi  Louis Kouadio  Philippe Delfosse  Frederic Giraud  Jurgen Junk  Lucien Hoffmann  Henri Maraite  Bernard Tychon 《农业科学与技术》2012,(12):1386-1399

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Brominated phenols as auxin-like molecules     

Stijn Spaepen  Joost Van Durme  Frederik Das  Sebastian Maurer-Stroh  Frederic Rousseau  Joost Schymkowitz  Jos Vanderleyden 《European Journal of Soil Biology》2009,45(1):81-87

2,6-Dibromophenol (DBP) was reported as an auxin-like molecule using molecular quantum similarity measures. In this study, the auxin activity of this molecule and its chlorinated homologue is further determined using a bacterial biosensor: the auxin-inducible ipdC promoter of Azospirillum brasilense. We were able to demonstrate that DBP can induce gene expression, but to a lesser extent than the auxin indole-3-acetic acid (IAA) and that DBP is not an antagonist for the IAA signalling pathway. To investigate the role of the bromine groups, the molecule 2,6-dichlorophenol (DCP) was also tested for gene expression induction. However, no induction could be observed. In a second part, DBP and other molecules were modelled in the auxin-binding pocket of the plant auxin receptor TIR1 to evaluate theoretical binding energies. Both DBP and its chlorinated homologue DCP are not strong ligands compared to other known auxins such as IAA. The importance of a carboxylated side chain for optimal binding (and probably auxin activity) was demonstrated.  相似文献   

Enhanced Mobilization of Field Contaminated Soil-bound PAHs to the Aqueous Phase under Anaerobic Conditions     

Han S. Kim  Katherine S. Lindsay  Frederic K. Pfaender 《Water, air, and soil pollution》2008,189(1-4):135-147

Although microbially-mediated redox environments can alter the characteristics of soil/sediment organic matter (SOM) and its interactions with persistent hydrophobic organic contaminants (HOCs) bound to soils and sediments, the nature of their effects has not been adequately addressed. In this study, a field soil collected from a manufacturer gas plant site and contaminated historically with creosotes was incubated under aerobic and anoxic/anaerobic conditions along with various amendments (extra carbon and enrichment minerals) for stimulating microbial activities. Anaerobic conditions stimulated significant fractions of bound polycyclic aromatic hydrocarbons (PAHs) encompassing naphthalene through benzo[g,h,i]perylene to be mobilized to the aqueous phase, leaving their aqueous phase concentrations far in excess of solubility (increases in their apparent aqueous phase concentrations by factors as high as 62.8 relative to their initial aqueous phase concentrations). Such effects became more evident for high molecular weight PAHs. Dissolved organic matter exhibiting a high affinity for PAHs was liberated from soils during the anaerobic soil incubations. Feasibility of this concept for field applications was evaluated with a lab-scale continuous flow system composed of an anaerobic soil column followed by an aerobic bioreactor inoculated with PAH-degrading microbes. High quantities of PAHs exceeding their aqueous solubilities were eluted from the anaerobic soil column and those mobilized PAHs were readily bioavailable in the secondary aerobic bioreactor. This study may offer a potential method for cost-effective and performance-efficient ex situ remediation technologies (or in situ if appropriate hydrological control available in the contaminated field site) and risk assessment for the HOC-contaminated soils/sediments.  相似文献   

Identifying road mortality threat at multiple spatial scales for semi-aquatic turtles     

Frederic Beaudry  Phillip G. deMaynadier 《Biological conservation》2008,141(10):2550-2563

Prioritizing sites for localized mitigation measures, and forecasting the effect of interventions on an endangered population, requires an understanding of the spatial scales at which threat processes operate. Road mortality is among the greatest threats to semi-terrestrial freshwater turtles due to the group’s life-history traits. Declining throughout much of their range, spotted (Clemmys guttata) and Blanding’s turtles (Emydoidea blandingii) are exposed to high road densities and traffic volumes in the northeastern United States. We examine the distribution of roadkill risk for spotted and Blanding’s turtles at three spatial scales. Tortuosity during upland movements was used to predict road-crossing locations at the single-movement scale. A gravity model of wetland-to-wetland interactions was then developed to identify road mortality hot spots at a broader road segment scale. Finally, road-crossing risk was assessed at the scale of focal areas that support distinct populations, using a population viability analysis to evaluate the consequences of road mortality on resident populations. The observed spatial variability of road mortality risk was high for single road crossing movements, limiting the effectiveness of static mitigation measures conducted at this scale. At the broader road segment scale, road mortality hotspots were evident. The demographic risk associated with roads varied widely among discrete populations, with probabilities of extinction over 100-year projections reaching 5.1% for spotted turtles, and 58.8% for Blanding’s turtles. We conclude that conservation interventions are most likely to be effective in mitigating the effects of road mortality when implemented at the road segment and population scales.  相似文献   

SPECIFIC BACTERIAL PATHOGENS THEIR IMPORTANCE AND CONTROL     

J. FRANCIS D.Sc.  MSc.  F.R.C.V.S.  F.R.S.M.  Hon. Dip. Am. Vet. Epid. SOC. 《Australian veterinary journal》1975,51(5):283-284

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Pedicle graft in a dog; a case report     

CAWLEY AJ  FRANCIS SM 《The Cornell veterinarian》1958,48(1):12-16

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STREPTOMYCIN IN THE CONTROL OF LEPTOSPIROSIS IN PIGS AND CATTLE     

J. FRANCIS D.Sc.  M.Sc.  F.R.C.V.S. 《Australian veterinary journal》1967,43(6):236-236

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