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Moreover, PQQ is unique in its ability to stimulate the production of nerve growth factor (NGF), a vital protein that supports the survival and growth of neurons. This neuroprotective effect makes PQQ an interesting candidate for research related to Alzheimer's disease and other forms of dementia.
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Similar to the housing surface stop technique, this method uses a stop at the machined housing face to set the seal depth. It is typically used in housings with flat outer surfaces. Verifying the placement through visual inspection or with a feeler gauge ensures placement accuracy.