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Back pressure is the term used for the hydraulic pressure required to create a flow through a chromatography column in high-performance liquid chromatography, the term deriving from the fact that it is generated by the resistance of the column, and exerts its influence backwards on the pump that must supply the flow.
Backflow occurs for one of two reasons, either back pressure or back siphonage. [1] Back pressure is the result of a higher pressure in the system than in its supply, i.e. the system pressure has been increased by some means. This may occur in unvented heating systems, where thermal expansion increases the pressure. Back siphonage is the result ...
Hypertensive disease of pregnancy, also known as maternal hypertensive disorder, is a group of high blood pressure disorders that include preeclampsia, preeclampsia superimposed on chronic hypertension, gestational hypertension, and chronic hypertension. [3] Maternal hypertensive disorders occurred in about 20.7 million women in 2013. [1]
Knee to chest stretch - Lying down on the back, bring one leg up and pull it towards the chest and hold for 30–45 seconds. Posterior pelvic tilt (bridges) - Lying on the back, bend both legs and place your feet on the floor. Raise stomach from the ground, lifting the back and pelvis, until the back is straight. Hold for 5–10 seconds and relax.
Flu A and flu B are the most common strains of the flu that circulate in humans. The U.S. is currently in the middle of flu season, with a high number of cases reported across the country.
Spinal stenosis is an abnormal narrowing of the spinal canal or neural foramen that results in pressure on the spinal cord or nerve roots. [6] Symptoms may include pain, numbness, or weakness in the arms or legs. [1] Symptoms are typically gradual in onset and improve with leaning forward. [1]
Beyond working your heart, running also benefits your lungs, bones, muscles, cholesterol, blood pressure, and brain, says Richardson. If you’re running for general health, ...
Mom of three Holly Pardue struggled with excessive bleeding after the birth of her third child in January 2024. She was told it was just "stress and hormones" and advised to go for walks, but ...