Dépérissement actuel des chênes

Immunisation anticlaveleuse. Methode actuel de production du vaccin claveleux a l'Institut d'Etat des Sérums et Vaccins Razi, Iran

Hearing Aid Evaluation: Limitations of Present Procedures and Future Requirements L'evaluation prothetique: limites des procedures actuel/es et besoins futurs

This paper discusses the underlying conceptual problems of techniques employed in hearing aid selection and evaluation processes in four classes: target gain formulae, consumers' jUdgement, speech intelligibility, and self-report. Although technology for delivering and assessing acoustic properties is now largely in place, all the prescriptive formulae suffer from the absence of systematic larg...

Regional impacts of periodical cicadas on oak radial increment

We investigated the effects of periodical cicadas (Magicicada spp.) on growth of their hosts using records of radial tree-ring growth on oaks (Quercus spp., a common host genus) and pines (Pinus spp., a common nonhost genus) growing within the ranges of 13and 17-year broods. Growth of oaks was significantly depressed during years of adult emergence by about 4%. Effects in years following emerge...

Etude sur l'Agalaxic contagieuse des chèvres et des moutons

Predicting stump sprouting and competitive success of five oak species in southern Indiana

We measured 2188 oak trees (Quercus spp.) on the Hoosier National Forest in southern Indiana before and 1, 5, and 10 years after clear-cutting to determine the influence of parent tree age, diameter breast height, and site index on the probability that there was one or more living sprouts per stump: (i) 1 year after clear-cutting (sprouting probability) or (ii) that were competitively successfu...