By leaving open in turn the genital orifice, coxal apertures and anus, the present study has shown that engorged female Argas walkerae release at least 1 volatile pheromone mainly, or maybe exclusively, from the genital aperture. Although this aggregation-inducing pheromone is perceived by all post-larval stages, engorged males of A. walkerae react most strongly. A possible, but only slight, em...

Three Fourier transform infrared (FTIR) spectrometers were on board the NASA DC-8 during the second Airborne Arctic Stratospheric Expedition (AASE II) in 1992. Two FTIRs used solar absorption and one used thermal emission. We compare over 2000 measurements from these 3 FTIRs, on 12 DC-8 flights, for closely coincident air masses and times, both inside and outside the polar vortex. In the majori...

The seasonal variation of mono-and sesquiterpene emission rates of Scots pine was measured from April to October in 2004. The emission rates were measured daily in the afternoons with the exception of weekends. Emissions were measured from two branches; one of them was debudded in May (branch A), while the other was allowed to grow new needles (branch B). The monoterpene emission pattern remain...

Non-destructive methods are of great interest for the analysis of cultural heritage. Among the different possible techniques, this paper presents a low cost prototype based on the emission and reception of airborne ultrasound without direct contact with the test specimen. We successfully performed a method test for the detection of brick joints under a XV th century Renaissance fresco of the Me...

Carbon compounds account for a large fraction of airborne particulate matter (‘carbonaceous aerosols’). Their presence raises a number of scientific questions dealing with climate issues and possible effects on human health. This review describes the current state of knowledge with respect to the ambient concentrations levels (elemental carbon, organic carbon and organic matter) and the various...

RESUME Far infrared emission measurements acquired by the SAFIRE-A limb sounder aboard the M-55 Geophysica high altitude aircraft, during dedicated ENVISAT validation campaigns, primarily aimed at validating MIPAS operational products. O3 and HNO3 observations obtained by the airborne instrument during the midlatitude flight on 24 October, 2002 and intercomparison with MIPAS off-line operationa...

Researchers seek to identify dry lake bed deposits on Mars, if present. The Global Surveyor TES and Mars Odyssey THEMIS are primary tools in this search. However, there are no published thermal infrared spectrometer (hyperspectral) airborne studies of a dry lake bed. Here we present the first such study and the impacts on TES/THEMIS interpretations. This research addresses a looming gap in the ...