The meaning of Sigma in statistical analysis is a function of whether you use the upper or lower case of the letter. The uppercase use of sigma denotes a summation while the lowercase represents a ...

Periphyton Response to Additions of Glucose and Hydrogen Peroxide as Control Measures of Harmful Algal Blooms. Journal of ...

The way we shop, do our banking, watch TV and listen to music is unrecognisable from 30 years ago - yet as a doctor, the way ...

Objective: This study aims to investigate the drainage effect and clinical outcomes of negative pressure chest drainage in patients after two-port thoracoscopic valve surgery, comparing the ...