this research project is a field study to investigate the complications of general anaesthesia with mask in patients under surgery in a hospital affiliated to university of medical sciences iran. the specific goals of this study are as follows:   -to determine some of the characters of patients under study.   -to determine the complications of general anesthesia with mask during surgery in one ...

Alveolar bone regeneration is a significant challenge in dental implantation. Novel biomaterials and tissue-engineered constructs are under extensive development and awaiting in vivo animal tests to find clinical endpoint. Here, we establish a novel in vivo model, modifying gingivoperiosteoplasty in rat for the alveolar bone regeneration. Rat premaxillary bone defects were filled with silk scaf...

This paper develops a highly simplified model with which to analyze the phenomenon of sleep. Motivated by Crick’s suggestion that sleep is the brain’s way of “taking out the trash,” a suggestion that is supported by emerging evidence, we consider the problem of the filling and emptying of a tank. At any given time, the tank may take in external resource, or fill, if resource is available at tha...

Seed masting and production of empty seeds have often been considered independently as different strategies to reduce seed predation by animals. Here, we integrate both phenomena within the whole assemblage of seed predators (both pre and post-dispersal) and in two contrasting microsites (open vs. sheltered) to improve our understanding of the factors controlling seed predation in a wind-disper...

Component models of heat production identified in a proposed system of partitioning ME intake and a dynamic systems model that predicts gain in empty BW in cattle resulting from a known intake of ME were evaluated. Evaluations were done in four main areas: 1) net efficiency of ME utilization for gain, 2) relationship between recovered energy and ME intake, 3) predicting gain in empty BW from re...