The loss of these cells is followed by the degeneration (atrophy) of the optic nerve. X-linked optic atrophy type 2 is caused by mutation in the OPA2 gene with cytogenetic location Xp11.4-p11.21. The patient presents with early-onset childhood vision loss with slow progression of loss.
Metal Seals. More Products Â» Metal Seals. Munaco Sealing Solutions, Inc. provides numerous variations of metal seals like metal O-Rings, metal C-Rings, metal E-Rings, Spring-Energized metal seals, metal U-Rings, and metal V-Rings. Munaco's unique experience helps to provide some of the most efficient metal sealing technologies available.
For very high temperature applications (say, over 200 Â°C.), general practice is to eliminate usage of any type of elastomers in seals; in such cases, all-metal seals are used in the form of metallic bellows. Other Body Material: The commonest material for seal body parts is Stainless Steels (Grades 304 or 316). Cheaper than these are sundry metals like brasses/bronzes/cast-irons/steels/etc. Springs, Grub Screws, Drive Pins, Drive Screws, etc., are all in St.Steels.