The red-footed booby (Sula sula) is considered one of the most polymorphic seabirds, with 3 recognized major adult plumage types: 1) white, 2) white-tailed brown, and 3) brown and several degrees of intermediates. Here we show that the white/melanic polymorphism observed in this species is perfectly associated with 2 point substitutions, Val85Met and His207Arg, at the melanocortin-1 receptor (M...

(1) Background: The Quaternary river bank deposits of the European North Russia contain several mollusk fossils that can give important past-climate information which is relevant to understand evolution climate in Holocene period and predict future scenarios on change. (2) purpose research: reconstruction main physical chemical parameters habitat mollusks based determination species study isoto...

With the development of smart cities, use unmanned aerial vehicles (UAVs) for interactive information exchange between air and ground can provide effective support deployment emergency work. However, existing UAV air-to-ground channels often a single channel model. Considering that density distribution obstructions on transmission paths at different heights are different, only using model great...

I established reference values for weight, hematology, and serum chemistry for seven species of free-ranging Hawaiian tropical pelagic seabirds comprising three orders (Procellariiformes, Pelecaniformes, Charadriiformes) and six families (Procellariidae, Phaethontidae, Diomedeidae, Sulidae, Fregatidae, and Laridae). Species examined included 84 Hawaiian darkrumped petrels (Pterodoma phaeopygia)...

In this paper, we present a new computationally efficient method for direction-of-arrival (DOA) estimation in uniform linear arrays (ULAs). A sparse uniform linear array (SULA) structure is firstly extracted from the conventional ULA to exploit its advantage in high resolution. By performing the multiple signal classification (MUSIC), the noise subspace of the SULA is simultaneously orthogonal ...

The major phenotypes of lon mutations, UV sensitivity and overproduction of capsule, are due to the stabilization of two substrates, SulA and RcsA. Inactivation of transfer mRNA (tmRNA) (encoded by ssrA), coupled with a multicopy kanamycin resistance determinant, suppressed both lon phenotypes and restored the rapid degradation of SulA. This novel protease activity was named Alp but was never i...

Proteus mirabilis urease catalyzes the hydrolysis of urea to CO(2) and NH(3), resulting in urinary stone formation in individuals with complicated urinary tract infections. UreR, a member of the AraC family, activates transcription of the genes encoding urease enzyme subunits and accessory proteins, ureDABCEFG, as well as its own transcription in the presence of urea. Based on sequence homology...