Hearing protectors are labeled with a Noise Reduction Rating (NRR) that is derived from laboratory measurements of the attenuation provided to trained and motivated human subjects in a ‘sterile’ environment. As intended, these measurements represent a best-fit condition. The literature indicates that the average attenuation provided to end-users of hearing protectors is often only a fraction of...

Electrocatalytic production of ammonia from dinitrogen is considered as a sustainable alternative to the energy-demanding and pollutive Haber-Bosch process. A promising class materials for selective nitrogen reduction (NRR) corresponds transition-metal oxides given that these electrodes do not show high activity toward competing hydrogen evolution reaction. So far, density functional theory cal...

Electrocatalytic production of ammonia from dinitrogen is considered as a sustainable alternative to the energy-demanding and pollutive Haber-Bosch process. A promising class materials for selective nitrogen reduction (NRR) corresponds transition-metal oxides given that these electrodes do not show high activity toward competing hydrogen evolution reaction. So far, density functional theory cal...

A new method for the synthesis of tricyclic nitrogen heterocycles from N,2-diallylaniline derivatives is described. These transformations proceed via sequential alkene aminopalladation of an intermediate L(n)Pd(Ar)(NRR') species followed by alkene carbopalladation of the resulting L(n)Pd(Ar)(R) complex. Both alkene insertion steps occur in preference to C-N or C-C bond-forming reductive elimina...

The electrochemical nitrogen reduction reaction (NRR) over single-atom catalysts (SACs) anchored on Mo vacancies of Mo2CO2 MXene nanosheets under ambient conditions suffers from poor selectivity, low yield, and Faradaic efficiency because their sluggish kinetics the competing hydrogen evolution reaction. Herein, density functional theory calculations are performed to improve understanding selec...

In Australia, declining water quality in the Great Barrier Reef (GBR) is a threat to its marine ecosystems and nitrate (NO3?) from sugar cane-dominated agricultural areas coastal catchments of North Queensland key pollutant concern. Woodchip bioreactors have been identified as potential low-cost remediation technology reduce NO3? runoff cane farms. This study aimed trial different designs (deni...

BACKGROUND In a species with a large distribution relative to its dispersal capacity, geographic variation in traits may be explained by gene flow, selection, or the combined effects of both. Studies of genetic diversity using neutral molecular markers show that patterns of isolation by distance (IBD) or barrier effect may be evident for geographic variation at the molecular level in amphibian ...

In terms of policy, the BRICS region has prioritized achieving environmental sustainability. Environmental problems are mostly caused by area's continuous reliance on fossil fuels to meet its energy requirements. It is also challenging significantly reduce region's because historically, been a big importer fuels. As result, greenhouse gas (GHG) emission rates countries have rising over time. Fu...

The biggest challenge of exploring the catalytic properties under-coordinated nanoclusters is issue stability. We demonstrate herein that chemical dopants on sulfur-doped graphene (S-G) can be utilized to stabilize ultrafine (sub-2 nm) Au25(PET)18 clusters enable stable nitrogen reduction reaction (NRR) without significant structural degradation. Au25@S-G exhibits an ammonia yield rate $$27.5\,...