Social insect cuticular hydrocarbon (CHC) mixtures are among the most complex chemical cues known and are important in nest-mate, caste and species recognition. Despite our growing knowledge of the nature of these cues, we have very little insight into how social insects actually perceive and discriminate among these chemicals. In this study, we use the… (More)
Social insects maintain colony cohesion by recognizing and, if necessary, discriminating against conspecifics that are not part of the colony. This recognition ability is encoded by a complex mixture of cuticular hydrocarbons (CHCs), although it is largely unclear how social insects interpret such a multifaceted signal. CHC profiles often contain several… (More)
BACKGROUND Ants form highly social and cooperative colonies that compete, and often fight, against other such colonies, both intra- and interspecifically. Some invasive ants take sociality to an extreme, forming geographically massive 'supercolonies' across thousands of kilometres. The success of social insects generally, as well as invasive ants in… (More)
Normal-hearing subjects' recognition of spectrally degraded speech was evaluated under conditions in which the consonant-vowel (C-V) intensity ratio was modified. Subjects identified 22 consonants presented in an /a-Consonant-a/ format at suprathreshold and near threshold conditions. Prior to C-V ratio modification, the stimuli were processed to limit… (More)
Synthesis: Fibrous V 3 O 7 ´H 2 O template crystals were prepared hydrother-mally according to Yamamoto and co-workers : an aqueous solution of VOSO 4 (0.15 M) was sealed in a poly(tetrafluoroethylene)-lined autoclave (Parr bomb 4749, 23 mL capacity) and heated at 180±220 C for 1±2 days. The resulting suspension was filtered, washed several times with… (More)
A silica gel-based method for extracting insect surface hydrocarbons. The genome sequence of the leaf-cutter ant, Atta cephalotes, reveals insights into its obligate symbiotic lifestyle. PLOS GENETICS 7:e1002007.
We describe a novel epitope discovery strategy for creating an affinity agent/peptide tag pair. A synthetic polymer nanoparticle (NP) was used as the "bait" to catch an affinity peptide tag. Biotinylated peptide tag candidates of varied sequence and length were attached to an avidin platform and screened for affinity against the polymer NP. NP affinity for… (More)
Ischemic stroke in a 12-year-old African-American boy was caused by intracranial fibromuscular dysplasia. Imaging investigations included computed tomography and magnetic resonance angiography, before reaching a definitive diagnosis with a conventional cerebral angiogram. This pediatric case of intracranial fibromuscular dysplasia highlights the need to… (More)