A NONLOCAL REACTION-DIFFUSION POPULATION MODEL WITH STAGE STRUCTURE Dedicated to Professor Paul Waltman on the occasion of his retirement DASHUN XU AND XIAO-QIANG ZHAO

Dynamics in a periodic competitive model with stage structure ✩

In this paper, we consider a time-delayed periodic system which describes the competition among mature populations. By appealing to theories of monotone dynamical systems, periodic semiflows and uniform persistence, we analyze the evolutionary behavior of the system and establish sufficient conditions for competitive coexistence and exclusion.  2005 Elsevier Inc. All rights reserved.

Developmental variability and stability in continuous-time host-parasitoid models.

Insect host-parasitoid systems are often modeled using delay-differential equations, with a fixed development time for the juvenile host and parasitoid stages. We explore here the effects of distributed development on the stability of these systems, for a random parasitism model incorporating an invulnerable host stage, and a negative binomial model that displays generation cycles. A shifted ga...

The organocatalytic asymmetric Neber reaction for the enantioselective synthesis of spirooxindole 2H-azirines.

The asymmetric Neber reaction of 3-O-sulfonyl ketoxime, in situ generated from isatin ketoxime and sulfonyl chloride, for the synthesis of chiral spirocyclic oxindole compounds is reported. With the developed protocol, a range of chiral spirooxindole 2H-azirines could be obtained in good to excellent yields and up to a 92 : 8 enantiomeric ratio by using (DHQD)2PHAL as the catalyst. This methodo...

Anti-White Spot Syndrome Virus Activity Possesses Litopenaeus vannamei A Novel C-Type Lectin from the Shrimp

Expert consensus on the evaluation and diagnosis of combat injuries of the Chinese People’s Liberation Army

The accurate assessment and diagnosis of combat injuries are the basis for triage and treatment of combat casualties. A consensus on the assessment and diagnosis of combat injuries was made and discussed at the second annual meeting of the Professional Committee on Disaster Medicine of the Chinese People's Liberation Army (PLA). In this consensus agreement, the massive hemorrhage, airway, respi...