Identifying new models for human eye diseases By Sara Cassidy, M.S., Ph.D. Although it is difficult to measure the impact of chronic conditions like eye disorders, Prevent Blindness America estimates that eye disorders and vision loss cost $139 billion in 2013, placing these conditions among the most expensive health disorders in the US.
Curing deadly engine vacuum leaks. Vacuum leaks can be located with spray carburetor cleaner or a can of WD-40. If the area is obstructed by linkage or hoses, use an extension nozzle to pinpoint the area of the vacuum leak.
Vacuum leak valves can accept high inlet pressures (~10 bar) yet control extremely low flow rates (say, 1x10-9 to 0.1 T.L/sec). At these flow rates, the significant throttling action of the valve is in molecular flow. Once the flow rate is established, it is not significantly affected by room temperature changes.