Drought and mountain pine beetle (Dendroctonus ponderosae Hopkins) outbreaks have affected millions of hectares of high-elevation conifer forests in the Northern Rocky Mountains during the past century. Little research has examined the distinction between mountain pine beetle outbreaks and climatic influence on radial growth in endangered whitebark pine (Pinus albicaulis Engelm.) ecosystems. We...

frothers havea profoundeffectonbubble size and also flotation efficiency. in present study the effect of type and dosage of frothers on the flotation response of coarse particles of quartz was investigated.  therefore, flotation response of coarse particles using frothers such as mibc, pine oil, poly propylene glycol with concentration of 0, 25, 50 and 75 g/t, was obtained respectively. for all...

Concurrent with fire exclusion, shortleaf pine loblolly pine hybrids have increased throughout the southeastern USA and may threaten the genetic integrity of shortleaf pine. Historically, fire favored shortleaf pine over other southern pine species, especially loblolly pine, with which it shares a broad sympatric natural range. Shortleaf pine seedlings have a morphological adaptation (basal cro...

Published online 3 July 2013 Ann. Ital. Chir. 1 Pervenuto in Redazione Maggio 2012. Accettato per la pubblicazione Settembre 2012 Correspondence to: Di Cataldo Antonio, MD, FACS; Department of Colorectal Surgery, University of Catania, Italy; V.le Odorico da Pordenone 5, 95125 Catania. (e-mail address: [email protected]) Antonio Di Cataldo*, Claudia Trombatore**, Aldo Cocuzza*, Rosalia Lati...

Ann. Ital. Chir., 84, 2, 2013 165 Pervenuto in Redazione Luglio 2012. Accettato per la pubblicazione Ottobre 2012 Correspondence to: Dr Aymen Trigui, Department of general and digestive surgery. Habib Bourguiba’s teaching hospital, 3029 Sfax, Tunisia. (E-mail: [email protected]) Aymen Trigui, Haitham Rejab, Ahmed Guirat, Abdelkadeur Mizouni, Mohamed Ben Amar, Rfik Mzali, Mohamed Issam Beyro...

aheadofprint 29 October 2012 Ann. Ital. Chir. 1 Pervenuto in Redazione Settembre 2012. Accettato per la pubblicazione Settembre 2012 Correspondence to: Giovanni Docimo M.D., Department of Surgery, Division of General Surgery, Second University of Naples, Via Pansini 5, 80131 Naples, Italy. (e-mail: [email protected]) Giovanni Docimo, Salvatore Tolone, Simona Gili, A. d’Alessandro, G. Ca...

hybridization is normally prevented by different flowering times in the two species, but under certain climatic/weather conditions hybridization may occur (Dorman and Barber 1956), and natural hybrids of shortleaf pine and loblolly pine have been reported (Zobel 1953, Hare and Switzer 1969, Edwards-Burke et al. 1997 and Stewart et al. 2010). The questions are where, when, and why do they hybrid...

Dendroctonus frontalis Zimmerman is a major disturbance agent in American pine forests, but attack preferences for various host species, and their relative suitability for reproduction, are poorly known. We studied patterns of beetle attack and reproduction during an infestation of stands containing Virginia pine and loblolly pine. Nearly all Virginia pine were attacked and killed, whereas a th...