Filtering Effect for Small Droplets

Filtering effect for small droplets (aerosols) by various masks; home made of tea cloth, surgical mask (3M "Tie-On") and a FFp2 (N95) respirator mask. The numbers are scaled to the reference of 100 (Source of droplets) for illustrative purposes, calculated from the PF (Protection Factor) values in table 2. Measurement was performed with a portacount counter that registers particles in the air with sizes in the range between 0.02 and 1 micrometer at the end of a 3-hour wearing period with no physical activity. The number for the protection are medians of 7 (or 8) adult volunteers per group. Protection at the beginning of the test was similar for the Tea Cloth and Surgical Mask, but for FFP2 the protection was double. Children experienced substantially less protection. 

Comments

Walking Prevents Heart Disease

According to the American Heart Association, Walking is no less effective than running when it comes to the prevention of heart-related disease or stroke. This activity helps avoid heart problems by lowering high blood pressure and cholesterol levels and improving blood circulation. #drsaisudarsan #neurosurgeron #topneurologist #neurosurgerynow #neurology #indiandoctors #MS #DNB #MRCS #MCh #DNB #MNAMS #FRCS #pulsehospitalranchi #neurologist #indiabestneurosurgeon #walkingeffects #preventsheartdisease #bloodpressure #bloodcirculation #heartstroke

World Brain Day

World Brain Day - Parkinson's disease. Move Together To End. #brainday #parkinsonsdisease #neurologist #indiandoctors #drsaisudarsan #spinesurgeon #neurosurgeon

What does the brain do ?

WHAT DOES THE BRAIN DO ? Though most significant feelings are still described as heartfelt, neurosciences prove that the brain drives all body activities. Memory: Brain is a bank of semantic knowledge. This aids in future survival by using the past information. Movement: All muscle movements are caused by nerve cells, though the conscious brain has only limited control over it. Emotions: They are the pre ordained modes of behavior that boost survival chances. They are animal instincts leaking through consciousness. Communication: It is a unique feature of brain. The speech centers control the formulation of language and execution of speech. It also comprehends what others are saying. Sensations: Brain processes all the information it receives to create a detailed picture of body surroundings. It filters out what is not needed. Thinking: It is a cognitive activity that allows the brain to interpret the world around us. Control: Breathing, circulation, digestio...

Dr Sai Sudarsan (MCh, FRCS)

Search This Blog