"high restrictions" is correct and usable in written English.
It usually means that something is limited or regulated in some way, often more than usual. For example, "The government imposed high restrictions on large gatherings due to the pandemic."
A recent report by the Pew Forum on Religion & Public Life shows that 32% of countries in the world have high restrictions on religion, while 70% of the world's population lives in a country with similarly high restrictions.
Schemes constructed in naive ways suffer from severe stability problems due to the high restrictions on time steps.
Over all, countries with "high or very high restrictions" rose from 31 percent of the total in 2009 to 37 percent in 2010.
Based on circuit and system-level simulations, high restrictions are imposed to graphene with respect to contact resistance and mean free path.
The Corn Laws of the 15th century were designed to prevent prices from becoming too high; restrictions were imposed on the right to export corn (wheat) when the domestic price exceeded a specified level.
I don't think that on any real trade issue, that puts any high restrictions on the trade.
The preparation obtained thus exhibited high restriction activity on λ DNA and linearized the plasmids pBR322 and pUC19.
The result of irrigation water quality index confirms 10.26% with no restriction, 23.08% with low restriction, 20.51% with moderate restriction, 15.38% with high restriction and 30.76% with the severe restriction for irrigation use.
A high restriction fragment length polymorphism (RFLP) was observed in the CaM intron of the Atlantic bluefin tuna Thunnus thynnus (Nakadate and Chow 2008).
Patients with MGUS present with low ADC values and low signal intensity on high b-value images, due to the high restriction of water diffusion, which can be explained by a higher bone marrow fat content and lower water content.
The result of irrigation groundwater quality index (IWQI) indicated 10.26% of the water samples with no restriction, 23.08% of the water samples with low restriction, 20.51% of the water samples with moderate restriction, 15.38% of the water samples with high restriction and 30.76% of the water samples with severe restriction for irrigation use (Table 5).
