Stress gradients and biodiversity: monoculture vulnerability drives stronger biodiversity effects during drought years.

Climate change will increase the likelihood and severity of droughts into the future. Although diversity may buffer plant communities against the negative effects of drought, the mechanisms underlying this pattern remain unclear. Higher-diversity plant communities may have a higher likelihood of including more drought-resistant species that can compensate for drought-sensitive species ("insurance effects").

Work aversion and associated changes in dopamine and serotonin transporter after methamphetamine exposure in rats.

Rationale: Methamphetamine (mAMPH) administration in animals can lead to a variety of cognitive and behavioral deficits. We previously reported non-acute reversal learning impairments after a single-day administration of mAMPH, providing evidence of this drug's selective effects on inhibitory control. Effortful decision-making (i.

Hinged molecular capsules: synthesis and conformational control via temperature, pH, or solvent composition.

Three new covalently linked molecular capsules were synthesized from their resorcinarene cavitand precursors in good yields. The capsules undergo reversible conformational switching between the closed "vase" form and the open "kite" form upon temperature or pH variation. The kite conformation obtained via either method in CDCl(3) switches to vase conformation upon addition of polar solvents such as acetone-d(6) or THF-d(8).