A Cryptic Non-Inducible Prophage Confers Phage-Immunity on the Streptococcus thermophilus M17PTZA496

open9openda Silva Duarte, Vinícius; Giaretta, Sabrina; Campanaro, Stefano; Treu, Laura; Armani, Andrea; Tarrah, Armin; Oliveira de Paula, Sérgio; Giacomini, Alessio; Corich, Vivianada Silva Duarte, Vinícius; Giaretta, Sabrina; Campanaro, Stefano; Treu, Laura; Armani, Andrea; Tarrah, Armin; Oliveira de Paula, Sérgio; Giacomini, Alessio; Corich, Vivian

Jesus Silva Merit Scholarship Recipients Recital

Jesus Silva Merit ScholarshipRecipients RecitalFriday, September 13, 2019 at 7pmSonia Vlahcevic Concert HallW.E. Singleton Center for the Performing ArtsVirginia Commonwealth UniversityRichmond, VA

A Note on the Injection Distance

Koetter and Kschischang showed in [R. Koetter and F.R. Kschischang, "Coding for Errors and Erasures in Random Network Coding," IEEE Trans. Inform. Theory, {54(8), 2008] that the network coding counterpart of Gabidulin codes performs asymptotically optimal with respect to the subspace distance. Recently, Silva and Kschischang introduced in [D. Silva and F.R. Kschischang, "On Metrics for Error Correction in Network Coding," To appear in IEEE Trans. Inform. Theory, ArXiv: 0805.3824v4[cs.IT], 2009] the injection distance to give a detailed picture of what happens in noncoherent network coding. We show that the above codes are also asymptotically optimal with respect to this distance

What works in primary schools?

Olmo Silva reviews the evidence on the effectiveness of increasing resources, modifying teaching methods and introducing choice and competition. Policies to improve primary education can involve increasing the resources available to schools, modifying teaching methods or introducing elements of accountability, choice and competition into education 'markets'. Olmo Silva reviews the latest evidence on the effectiveness of these three broad areas of intervention.

Off the Script: On Course-Based, Global Service Learning at RWU

Chelsea Silva ’14 chats with President Farish about a winter intersession trip to Petersfield, Jamaica, that focused on mental health issues in the island’s classrooms

Preliminary results for genetic transformation of shoot tip of Eucalyptus saligna Sm. via Agrobacterium tumefaciens

The regeneration of transgenic plants of Eucalypt is the largest difficulty for the genetic transformation of this genus; in addition a low rate of transformed plants is reached. The aim of this research was to evaluate acetosyringone (3',5'-Dimethoxy-4'-hydroxyacetophenone) on the co-culture medium during genetic transformation of shoot tips of Eucalyptus saligna via Agrobacterium tumefaciens and to promote the explants selection supposedly transformed. Shoot tip from multiple shoots was used as explants. These explants were pre-cultured during two days before the transformation. Strain EHA105 of A. tumefaciens harboring the plasmid pBI121 was used. The treatments were: 0 and 100 μM acetosyringone added to the co-culture, after co-culture the explants were cultured in multiplication medium supplemented with 250 mg.L-1 Cefotaxime® and each sub-culture the kanamycin levels were increased from 50 to 150 mg.L-1. The transient expression of the uidA gene in shoot tips was evaluated after the end of the co-culture (fifth day) and after seven days of culture on medium containing kanamycin. The presence of 100 µM acetosyringone at the co-culture of shoot tips of Eucalyptus saligna promoted higher transient expression of the uidA gene and retards toxic effects caused by kanamycin.A  regeneração  de  plantas  transgênicas  de  eucalipto representa a maior dificuldade para a transformação genética de plantas do gênero Eucalyptus, além de que taxas baixas de plantas transformadas são alcançadas. O objetivo desse trabalho foi avaliar a acetosiringona no meio de co-cultura durante a transformação genética de ápices caulinares  de Eucalyptus saligna via Agrobacterium tumefaciens e promover a seleção dos supostos explantes transformados. Ápices caulinares originados de brotações múltiplas foram usados como explantes. Estes explantes foram pré-cultivados por dois dias antes da transformação. A linhagem EHA105 de A. tumefaciens contendo o plasmídeo pBI120 foi utilizada. Os tratamentos foram: 0 e 100 μM de acetosiringona adicionada ao meio de co-cultura, após a co-cultura os explantes foram cultivados em meio de multiplicação suplementado com 250 mg.L-1 de cefotaxima e a cada subcultivo a concentração de canamicina foi aumentada, de 50 até 150 mg.L-1. A expressão transiente do gene uidA nos ápices caulinares foi avaliada no final da co-cultura e após sete dias em meio com canamicina (agente seletivo). A presença de 100 μM de acetosiringona no meio de co-cultura dos ápices caulinares de Eucalyptus saligna promoveu maior expressão transiente do gene uidA e retardou a ação tóxica causada pela canamicina

Men in Nursing: Filling in the Ranks

Fred Calixtro sees a marketing problem. Paul Higgins ‘06 says it’s an underpromoted career. David Silva ‘04 thinks the name is a turn-off. All three agree that nursing needs more men

A new species of Villiersicometes Santos-Silva, 2003 (Coleoptera, Cerambycidae, Disteniinae)

Villiersicometes absalom sp. nov., a new species of Villiersicometes Santos-Silva, 2003 (Coleoptera, Cerambycidae, Disteniinae) is described from French Guiana. The species is illustrated and a key to the species of the genus is provided