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Full-Text Articles in Medicine and Health Sciences
Window Into Retinal Studies, Gustavo D. Aguirre
Window Into Retinal Studies, Gustavo D. Aguirre
Gustavo D. Aguirre, VMD, PhD
Professor Gustavo Aguirre discusses the context of his research studies at the University of Pennsylvania, which are currently concentrating on the degenerative disease, retinitis pigmentosa.
Medical Training Using Simulation: Toward Fewer Animals And Safer Patients, Jonathan Balcombe
Medical Training Using Simulation: Toward Fewer Animals And Safer Patients, Jonathan Balcombe
Jonathan Balcombe, PhD
This paper presents the current status of computer-based simulation in medicine. Recent technological advances have enabled this field to emerge from esoteric explorations in academic laboratories to commercially available simulators designed to train users to perform medical procedures from start to finish. Today, more than a dozen companies are producing virtual reality simulators and interactive manikins for training in endoscopy, laparoscopy, anaesthesia, trauma management, angiography, and needle insertion. For many of these procedures, thousands of animals are still being used in training. Yet simulation has many advantages that can transcend scientific, ethical, economic and logistical problems that arise when using …
Hovering Energetics And Thermal Balance In Anna's Hummingbirds (Calypte Anna), Dennis Evangelista, Maria J. Fernandez, Madalyn S. Berns, Aaron M. Hoover, Robert Dudley
Hovering Energetics And Thermal Balance In Anna's Hummingbirds (Calypte Anna), Dennis Evangelista, Maria J. Fernandez, Madalyn S. Berns, Aaron M. Hoover, Robert Dudley
Aaron M. Hoover
We studied the energetics of hover-feeding Anna's hummingbirds, using three different simultaneous techniques: heat loss as estimated via thermal imaging, metabolic rate as measured at a feeder mask using flow-through respirometry, and aerodynamic power estimated from wingbeat kinematic data. These three methods yielded comparable estimates of power output at ambient air temperatures ranging from 18 degrees to 26 degrees C, whereas heat imbalance at higher air temperatures (up to 34 degrees C) suggested loss by mechanisms other than convection and radiation from the body, such as evaporative cooling and enthalpy rise associated with exhaled air and excreted water and convective …
Risk Factors Of Gastrointestinal Nematode Parasite Infections In Small Ruminants Kept In Smallholder Mixed Farms In Kenya., Agricola Odoi, J M. Gathuma, C K. Gachuiri, A Omore
Risk Factors Of Gastrointestinal Nematode Parasite Infections In Small Ruminants Kept In Smallholder Mixed Farms In Kenya., Agricola Odoi, J M. Gathuma, C K. Gachuiri, A Omore
Agricola Odoi
BACKGROUND: Helminth infections in small ruminants are serious problems in the developing world, particularly where nutrition and sanitation are poor. This study investigated the burden and risk factors of gastrointestinal nematode parasite infections in sheep and goats kept in smallholder mixed farms in the Kenyan Central Highlands. Three hundred and seven small ruminants were sampled from 66 smallholder mixed farms in agro-ecological zones 1 (humid) and 3 (semi-humid) in the Kenyan Central highlands. The farms were visited once a month for eight months during which a health and production survey questionnaire was administered. Fecal samples were collected at each visit …