Pressure-induced enhancement of thermoelectric power factor in pristine and hole-doped SnSe crystals.

We evaluate the influence of pressure on the thermoelectric power factors PF ≡ of pristine and Na-doped SnSe crystals by measuring their electrical conductivity () and Seebeck coefficient () up to ∼22 kbar with a self-clamped piston-cylinder cell. For both cases, () is enhanced while () reduced with increasing pressure as expected, but their imbalanced variations lead to a monotonic enhancement of PF under pressure. For pristine SnSe, (290 K) increases by ∼4 times from ∼10.

Effect of cycloart-24-en-3beta-ol from Euphorbia royleana latex on neuroenzyme AChE and oxidative metabolism of freshwater fish, Channa punctatus.

Cycloart-24-en-3beta-ol isolated from Euphorbia royleana latex possesses potent piscicidal activity against freshwater predatory fish Channa punctatus. Their short as well as long-term exposure causes significant (P<0.05) time and dose-dependent reversible alteration in the oxidative metabolism of the fish Channa punctatus Cycloart-24-en-3beta-ol also shifts fish respiratory pathway, inhibits energy production and AChE activity reversibly may be advantageous for their use as environmentally safe piscicide for controlling the predatory fish C.