Accessory sex gland (ASG) secretory proteins of the Chinese mitten crab (Eriocheir sinensis) can effectively digest the spermatophore wall. In order to identify which proteins participate in spermatophore wall digestion, a 50-kDa protein secreted from the ASG was purified to homogeneity by a series of isolation steps, including ammonium sulfate fractionation, Sephadex G-25 S gel-filtration, ion...

Abstract Monocropping of perennial cash crops providing livelihood for smallholders is replacing native forest throughout the tropics, but there no direct empirical evidence on impact soil organic carbon (SOC) and nitrogen (N) relative to multistrata-agroforestry-based cropping. In particular, conversion forests cropping a rapidly expanding monocropping khat ( Catha edulis Forskal) not known. W...

BACKGROUND Khat (Catha Edulis Forsk) is a natural psychoactive substance that contains addictive substances such as Cathine and Cathinone which have similar structure and action to amphetamine. This substance has been suggested that it can decrease perceived exertion and thus improve performance. There is no study in the literature regarding the effect of khat on exercise performance. Therefore...

Summery Khat is an evergreen shrub, which is cultivated as a bush or small tree; some oral traditions claim that khat originated from Yemen. However the literature indicates that khat originated from Ethiopia, specifically in Hararghe with a gradual expansion to different parts of Ethiopia, Yemen and other parts of the world. Chewing khat is both a social and a culture-based activity; it is sai...