Defence Science and Technology Laboratory

About: Defence Science and Technology Laboratory is a government organization based out in Salisbury, United Kingdom. It is known for research contribution in the topics: Burkholderia pseudomallei & Francisella tularensis. The organization has 926 authors who have published 1242 publications receiving 30091 citations. The organization is also known as: Dstl & [dstl].

Analysis of the PM and AM associated with the natural eigenfrequencies of spinning metallic and dielectric cylinders illuminated at high frequencies

Abstract: Doppler spectra from broadside 77 GHz plane wave radar illuminated dielectric and metallic cylinders are investigated under static and dynamic target conditions. The classical formulae of modulation theory are reviewed and verified empirically using measured data containing AM and PM components manifested as discrete sideband imbalances. Particular emphasis is placed on the phasor representation of the Doppler and on the practical understanding of the intrinsic AM/PM ambiguities. Techniques used in the analysis could be applicable to the problem of AM and PM conversion in oscillators and sources. In particular ambiguities are represented and bound using a vector in a box approach.

The history of the early years of metamaterials in USA and UK defense agencies

Abstract: This article discusses the historical events that occurred in the early years of metamaterials leading to the current development of metamaterials in the Defense Advanced Research Projects Agency, Department of Defense, and Ministry of Defence

Coxiella burnetii replicates in Galleria mellonella hemocytes and transcriptome mapping reveals in vivo regulated genes.

Abstract: Larvae of the greater wax moth (Galleria mellonella) are susceptible to infection with C. burnetii, an obligate intracellular bacterial pathogen. We show that bacteria are found in hemocytes after infection, and occupy vacuoles which are morphologically similar to Coxiella-containing vacuoles seen in infected mammalian phagocytes. We characterized the infection by transcriptome profiling of bacteria isolated from the hemocytes of infected larvae and identified 46 highly upregulated genes. The encoded proteins are predicted to be involved in translation, LPS biosynthesis, biotin synthesis, scavenging of reactive oxygen species, and included a T4SS effector and 30 hypothetical proteins. Some of these genes had previously been shown to be upregulated in buffalo green monkey (BGM) cells or in mice, whilst others appear to be regulated in a host-specific manner. Altogether, our results demonstrate the value of the G. mellonella model to study intracellular growth and identify potential virulence factors of C. burnetii.

Portland Cement Based Immobilization/Destruction of Chemical Weapon Agent Degradation Products

Abstract: The direct immobilization and destruction of two compounds relevant to chemical warfare agents, ethyl methylphosphonic acid (EMPA) and thiodiglycol (TDG), within a freshly mixed Portland cement pas...