In living cells, molecular motors convert chemical energy into mechanical work. Its thermodynamic energy efficiency, i.e. the ratio of output mechanical work to input chemical energy, is usually high. However, using two-state models, we found the motion of molecular motors is loosely coupled to the chemical cycle. Only part of the input energy can be converted into mechanical work. Others is di...

A nurse with a history of childhood asthma describes her experiences with intubation and mechanical ventilation. It is important for nurses to recognize that mechanical ventilation is very stressful for patients and for the patients' families. It is essential for nurses to keep the patient as the focus of their care. A key part of that focus is to reorient patients who are receiving mechanical ...

Geopolymers are amorphous silicate polymers that have been extensively studied due to their applications, scientific and technical relevance, potential as cement in substitution Portland. Much of the focus has use precursors aggregates rarely pure homogeneous with tailings being very common. The presence these impurities complicates interpretation some spectral methods, mainly infrared spectrom...