Influence of relative humidity on particle size and UV sensitivity of Serratia marcescens and Mycobacterium bovis BCG aerosols

Ko, G., First, M.W., Burge, H.A. (2000) Tubercle and Lung Disease: the Official Journal of the International Union Against Tuberculosis and Lung Disease, 80(4-5), 217-228 SETTING: A study of Serratia marcescens and BCG aerosols. OBJECTIVE: To evaluate the effect of relative humidity (RH) on (1) the particle size and (2) sensitivity of 254nm germicidal ultraviolet (UV) irradiation. METHODS: We built a RH controlled experimental chamber into which bacteria were aerosolized, exposed to varying amounts of UV irradiance over measured time periods, and quantitatively evaluated for viability. Aerosolized Serratia marcescens and…

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Farm-to-school programs: perspectives of school food service professionals

Izumi, B.T., Alaimo, K., Hamm, M.W. (2010) Journal of Nutrition Education and Behavior, 42(2), 83-91 OBJECTIVE: This qualitative study used a case study approach to explore the potential of farm-to-school programs to simultaneously improve children’s diets and provide farmers with viable market opportunities. DESIGN: Semi-structured interviews were the primary data collection strategy. SETTING: Seven farm-to-school programs in the Upper Midwest and Northeast regions of the United States. PARTICIPANTS: Seven school food service professionals, 7 farmers, and 4 food distributors recruited from 7 farm-to-school programs. PHENOMENON OF INTEREST: Interviews probed why…

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The relevance of gene transfer to the safety of food and feed derived from genetically modified (GM) plants

van den Eede, G., Aarts, H., Buhk, H.-J., Corthier, G., Flint, H.J., Hammes, W., Jacobsen, B., Midtvedt, T., van der Vossen, J., von Wright, A., Wackernagel, W., Wilcks, A. (2004) Food and Chemical Toxicology: an International Journal Published for the British Industrial Biological Research Association, 42(7), 1127-1156 In 2000, the thematic network ENTRANSFOOD was launched to assess four different topics that are all related to the testing or assessment of food containing or produced from genetically modified organisms (GMOs). Each of the topics was linked to a European Commission (EC)-funded…

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Climate change and wildfire in California

Westerling, A.L., Bryant, B.P. (2008) Climatic Change, 87(S1), 231-249 Wildfire risks for California under four climatic change scenarios were statistically modeled as functions of climate, hydrology, and topography. Wildfire risks for the GFDL and PCM global climate models and the A2 and B1 emissions scenarios were compared for 2005-2034, 2035-2064, and 2070-2099 against a modeled 1961-1990 reference period in California and neighboring states. Outcomes for the GFDL model runs, which exhibit higher temperatures than the PCM model runs, diverged sharply for different kinds of fire regimes, with increased temperatures promoting…

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Growth, Physiology and Biochemical Responses of Two Different Brassica Species to Elevated CO2

**top choice** Chakraborty, K., Uprety, D.C., Bhaduri, D. (2017) Proceedings of the National Academy of Sciences, India Section B: Biological Sciences, 87(2), 389-397 In an open top chamber study, two contrasting Brassica cultivars from two different species were grown under two distinct levels of CO2 concentration, 550 umol mol-1 (elevated) and 390 umol mol-1 (ambient). CO2 enrichment showed significant increase in growth, leaf area and dry matter production in both the species. The continuous higher rate of photosynthesis (36.2 % in RH-30 and 27.3 % in Pusa Gold) under elevated…

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Role of mucilage in seed dispersal and germination of the annual ephemeral Alyssum minus (Brassicaceae)

Sun, Y., Tan, D.Y., Baskin, C.C., Baskin, J.M. (2012) Australian Journal of Botany, 60(5), 439-449 Seeds of Alyssum minus, an annual ephemeral in shrublands of north-west China, can produce a large amount of mucilage. The primary aim of this study was to explore the role of mucilage in seed dispersal, settlement onto the soil surface and germination of this species. Width of imbibed seeds with mucilage was three times greater than that of seeds without mucilage, and mass of mucilage increased 167 times after imbibition. Expanded dry mucilage significantly increased…

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Effects of elevated carbon dioxide and soil nitrogen on growth of two leafy Brassica vegetables

**top choice** Thomson, G., Mollah, M., Partington, D., Jones, R., Argall, R., Tregenza, J., Fitzgerald, G. (2013) New Zealand Journal of Crop and Horticultural Science, 41(2), 69-77 Elevated atmospheric carbon dioxide (CO2) increases the instantaneous rate of photosynthesis in C3 plants. With ample nutrients and water, this so-called “CO2 fertilization effect” generally leads to improved growth and production of many plant species that humans use as food. To determine whether increasing CO2 could be beneficial to growth and yield of leafy Brassica vegetables, trials were established in a Free Air…

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Infection due to chromobacteria; report of 11 cases

Wheat, R.P.; Zuckerman, A.; Rantz, L.A. (1951) A.M.A. Archives of Internal Medicine, 88(4), 461-466 Infection of human beings by chromobacteria is a relatively rare occurrence. Hence, it has been of considerable interest in the past six months to observe in this hospital 11 cases of infection by these organisms, one of which had a fatal termination with bacterial endocarditis. The chromobacteria have been described as nonsporulating, aerobic bacilli, usually motile and usually Gram-negative, producing yellow, red, or violet pigment which is generally insoluble in water. The bacteria are ordinarily saprophytic…

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Histones, HMG, HU, IHF: Meme combat

Oberto, J., Drlica, K., Rouviere-Yaniv, J. (1994) Biochimie, 76(10-11), 901-908 In this review article, we present a compilation of the proteins homologous to Escherichia coli HU: the HU-like family. Two of these, HU and IHF from E coli have been extensively characterized genetically and biochemically. Due to their DNA binding activities, these proteins confer a condensed shape to the chromosome and regulate the transcription of selected sets of its genes. The parallel between the dual function of the HU-like proteins and the roles described for eukaryotic histone and HMG proteins…

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The association of fast food consumption with poor dietary outcomes and obesity among children: is it the fast food or the remainder of the diet?

Poti, J.M., Duffey, K.J., Popkin, B.M. (2014) The American Journal of Clinical Nutrition, 99(1), 162-171 BACKGROUND: Although fast food consumption has been linked to adverse health outcomes, the relative contribution of fast food itself compared with the rest of the diet to these associations remains unclear. OBJECTIVE: Our objective was to compare the independent associations with overweight/obesity or dietary outcomes for fast food consumption compared with dietary pattern for the remainder of intake. DESIGN: This cross-sectional analysis studied 4466 US children aged 2-18 y from NHANES 2007-2010. Cluster analysis identified…

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