In B. subtilis swarming and robust swimming motility require the positive trigger of SwrA on fla/che operon expression. Despite having an essential and specific activity, how SwrA executes this task has remained elusive thus far. We demonstrate here that SwrA acts at the main σ(A)-dependent fla/che promoter PA(fla/che) through DegU. Electrophoretic mobility shift assays (EMSA) reveal that SwrA ...

In questo lavoro viene proposta una estensione del linguaggio datalog [CP97]. datalog è un linguaggio logico basato su datalog, la cui innovazione sostanziale consiste nell’aumento della potenza espressiva, tramite l’introduzione di una semantica basata sulla circoscrizione, un meccanismo deduttivo non monotòno che generalizza l’ipotesi di mondo chiuso. Questo tipo di semantica fornisce interes...

L ife hisrory research represenrs one of rhe many merhodologies rhar fall under che moce general rubric of qualiracive research. Specifically, life hisrory and narracive analysis involve che use of discourse ro scudy human performance. This research merhod provides a rich descripcion of a person's represenracion of meaningful experiences and evems. The major source of dara is rhe inrerview, whi...

Peach harvest workers were evaluated for exposure to azinphosmethyl residues by measuring foliar residues, urinary alkyl phosphate metabolites, plasma and erythrocyte (RBC) cholinesterase (ChE), and dermal residues using clothing and skin washes. Workers entered orchards 51 days after application and worked in treated fields for ten of the next 17 days. Dislodgeable foliar residues ranged from ...

Sommario Nei sistemi P2P un serio problema che ne limita la scalabilità è l’esplosione di traffico dovuto al fatto che ogni peer propaga le query a tutto l’insieme dei peer ad esso noti. In questo lavoro affrontiamo tale problema proponendo una strategia per ridurre il numero di peer a cui propagare le query selezionando quei peer verso i quali l’aspettativa è alta. L’innovatività della propost...

Diblock copolymer nanoparticles encapsulating a paclitaxel prodrug, Propac 7, have been used to demonstrate the usefulness of a nonmetabolizable radioactive marker, cholesteryl hexadecyl ether (CHE), to evaluate nanoparticle formulation variables. Since CHE did not exchange out of the nanoparticles, the rate of clearance of the CHE could be used as an indicator of nanoparticle stability in vivo...

Wavelength division multiplexing (WDM) switching has been emerging as the dominant technology in optical networks. In this paper, we study the switching performance of WDM optical packet switch (OPS) equipped with tunable wavelength converter sharing dedicated to each output fiber line under self-similar variable packet length traffic. In this study, we model WDM OPS employing tunable wavelengt...

Myelin, made by oligodendrocytes, is essential for rapid information transfer in the central nervous system. Oligodendrocyte precursors (OPs) receive glutamatergic synaptic input from axons but how this affects their development is unclear. Murine OPs in white matter express AMPA receptor (AMPAR) subunits GluA2, GluA3 and GluA4. We generated mice in which OPs lack both GluA2 and GluA3, or all t...

BACKGROUND The major objective of the National Health Insurance Scheme (NHIS) in Nigeria is to protect families from the financial hardship of large medical bills. Catastrophic Health Expenditure (CHE) is rampart in Nigeria despite the take-off of the NHIS. This study aimed to determine if households enrolled in the NHIS were protected from having CHE. METHODS The study took place among 714 h...

Optical Packet Switched (OPS) networks are known to suffer from high packet losses due to contentions. Techniques such as fiber delay line (FDL) buffering and wavelength conversion help to relieve contentions to an extent, but are expensive and are therefore used sparingly. This paper explores how electronic edge nodes can condition the traffic entering the OPS network with the objective of uti...