The phrase "role as a buffer" is correct and can be used in written English.
This phrase can be used to describe a role that someone or something serves in reducing the impact of a situation, often as a mediator between two parties. For example, "The United Nations is playing a major role as a buffer in resolving the international conflict."
Its traditional role as a buffer body between the government and the universities has been severely undermined.
This loss of integrity impacts soil's ability to store water, which neutralizes its role as a buffer to floods and a fruitful base for plants.
Laos has since reverted to its role as a buffer state between Communist Vietnam and China and the surging capitalist economies of Southeast Asia.
As Ben S. Bernanke, the Federal Reserve chairman, said this week, regulations should allow capital "to serve its intended role as a buffer — one built up during good times and drawn down during bad times in a manner consistent with safety and soundness".
Not only would a Palestinian state compete for some of the aid that now comes his way, but it might also steal the kingdom's vaunted role as a buffer between Israel and a turbulent Arab world.
The thin layer plays a role as a buffer layer [31], connecting the substrate and the VG nanosheets.
Central Asia's leaders have long learned to live with Russia's view of their countries' role: as a useful buffer to volatile Afghanistan, and as important trading partners and energy suppliers.
The combination with β-alanine further renders the histidine moiety inert to proteogenic reaction with other amino acids, enabling high concentrations to be accumulated in muscle cells, further enhancing its quantitative role as a pH buffer.
I'm destined for great things.' " To illuminate nostalgia's role as an emotional buffer, Routledge and other researchers attempted to destabilize their subjects' sense of self.
The environment plays a critical role in serving as a buffer against infectious disease.
In addition to participating in the glutathionylation of toxic electrophiles, glutathione has a key role as a cell redox buffer.
