The activity-guided fractionation of the MeOH extract of the flower of Paulownia coreana led to the isolation of a new geranylated flavanone, 3'-O-methyl-5'-hydroxydiplacol (1), along with 10 known compounds (2-11). Their structures were determined using spectroscopic techniques, which included one and two dimensional (1- and 2D)-NMR. Among the isolates, compounds 1-6 showed potent inhibitory a...

Dissecting the luminosity function of the Coma cluster of galaxies by means of CFHT wide field images Abstract. By means of wide–field (42 × 28 arcmin) CCD images of the Coma cluster of galaxies and of control fields, taken at the Canada– France–Hawaii telescope with the CFH12K and UH8K cameras, we determine the luminosity function bi–variate in central brightness. We found a clear progression ...

Biomass feedstocks have been utilized for the commercial production of a wide range fuels and chemicals through pyrolysis process. Broom weed is abundant but it has not widely used in Nigeria as means useful fuel chemical thereby constituting an environmental menace. This study aimed to determine effects selected process parameters on product yields during broom fixed bed reactor. was obtained ...

In this squib, we study some symmetry patterns that arise from introducing a notion of duality in categorial grammar. We first look at residuated and dually residuated families of operations, in syntax and semantics. Inspecting the monotonicity properties of these operations, we then identify a further set of (dually) Galois connected binary operations, hitherto uninvestigated in the linguistic...

The imagos and nymphs of Siphlonurus davidi (Navás, 1932) are described for the first time. The adult has colourful wings and cross veins, the MP is forked asymmetrically at its base, a long cubital area is present with more intercalaries, and it has a relatively simpler penis and larger hindwings compared to its congeners. The venation and genitalia show that it is a plesiomorphic species in t...

Three line stereo scanners working in push-broom mode are of high interest for future remote sensing camera developments. This contribution deals with some basic considerations concerning the geometric, spectral, and radiometric design of such a camera. These considerations are applied to the design of the Wide-Angle Optoelectronic Stereo Scanner WAOSS for the Russian mission Mars-96 (Bild&Ton,...