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We present the room temperature detection of carbon monoxide using Au decorated zinc oxide (ZnO) nanowires. Zinc oxide nanowires were grown via the vapor liquid solid method whereas the gold nanoparticles were prepared by the solution growth method. The surface of the ZnO nanowires was decorated by Au nanoparticles. Gas sensing properties of such nanowires were studied at room temperature for various concentrations of CO (100 to 1000 ppm) in synthetic air. Enhancement in gas sensing response by Au decoration on ZnO nanowires was observed. Au nanoparticles act as a catalyst in chemical sensitization and improve the reaction and response time. The improvement in gas sensing behavior is attributed to the change in conductivity of the metal decorated ZnO nanowires on CO exposure due to the transfer of electrons resulting from gas oxidation at the ZnO nanowire surface.

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HCs reflect brain size in young children; brain size is linked to cognitive function. Poor head growth represents another facet of the 'silent emergency' of child undernutrition. Routine HCZ assessments may contribute to better understanding of the links between poverty and cognitive development.

Heifer interventions resulted in improved socioeconomic status and household income per family member. Children under 60 months of age in the intervention group had greater incremental improvement in height-for-age and weight-for-age z-scores than children in the control group, and longer participation in Heifer activities was associated with better growth. Poverty alleviation programs, such as Heifer, may indirectly benefit child growth.