Myoglobin Concentration and Oxygen Stores in Different Functional Muscle Groups from Three Small Cetacean Species.

Compared with terrestrial mammals, marine mammals possess increased muscle myoglobin concentrations (Mb concentration, g Mb · 100g muscle), enhancing their onboard oxygen (O) stores and their aerobic dive limit. Although myoglobin is not homogeneously distributed, cetacean muscle O stores have been often determined by measuring Mb concentration from a single muscle sample () and multiplying that value by the animal's locomotor muscle or total muscle mass. This study serves to determine the accuracy of previous cetacean muscle O stores calculations.

Covid-19: Race For A Vaccine.

Description The world is in the midst of a pandemic from COVID-19, a disease caused by the virus SARS-CoV-2. Despite broad mitigation efforts, new cases continue with 74 million cases and 1.6 million deaths worldwide.

Locomotor muscle morphology of three species of pelagic delphinids.

The locomotor muscle morphology of diving mammals yields insights into how they utilize their environment and partition resources. This study examined a primary locomotor muscle, the longissimus, in three closely related, similarly sized pelagic delphinids (n = 7-9 adults of each species) that exhibit different habitat and depth preferences. The Atlantic spotted dolphin (Stenella frontalis) is a relatively shallow diver, inhabiting continental shelf waters; the striped (Stenella coeruleoalba) and short-beaked common (Delphinus delphis) dolphins are sympatric, deep-water species that dive to different depths.

Theophylline and Caffeine as Alternatives During an Aminophylline Shortage.

The latest aminophylline shortage has prompted a need for alternative reversal agents for pharmacological stress testing. Cardiac stress testing is common for diagnosis and prognosis in patients with coronary heart disease. Options for pharmacological stress test agents include adenosine, regadenoson, dipyridamole, and dobutamine, whereas aminophylline is the recommended reversal agent.