Tyrosinase is a copper-binding enzyme involved in melanin biosynthesis.However, the detailed structure of human tyrosinase has not yet been solved, along with the identification of the key sites responsible for its catalytic activity.We used site-directed mutagenesis to identify the residues critical for the copper binding of human tyrosinase.Seven

Background Patterns of vocal communication have implications for species conservation: a change in calling behaviour can, for instance, reflect a disturbed habitat.More importantly, call rate is a parameter that allows conservation planners to convert call density into animal density, when detecting calls with a passive acoustic monitoring system (

The objective of this study was to compare the effects of calf starters of different starch and fibre content on the growth, blood and rumen parameters of Holstein female calves during read more the pre-weaning period.A total of 60 calves were divided into two groups.Group A/B was fed according to a two-phase calf nutrition system: the calves recei

Rotor-craft style UAV, such as the quadrotor, has ribavirin coupon become increasingly popular with researchers due to its advantages over fixed-wing UAV.The quadrotor is highly maneuverable, can perform vertical take-off and landing (VTOL), and can hover flight capability.Nevertheless, handling the quadrotor complex, highly nonlinear dynamics is d