The phrase "are formulated from a" is correct and usable in written English.
It can be used when describing how something is created or developed based on a particular source or material.
Example: "The new policies are formulated from a comprehensive analysis of the previous year's data."
Alternatives: "are derived from a" or "are based on a".
High-performance lubricants are formulated from a base stock (often an oil blend) and property-enhancing additives.
The truncation errors associated with finite difference solutions of the advection-dispersion equation with first-order reaction are formulated from a Taylor analysis.
Compound feeds are principally used for poultry, pigs and dairy cows and are formulated from a range of raw materials, including maize and other cereals and oilseeds such as soybeans and canola.
The most widely used equations are Bassey's demispan equations, which are derived from a sample of 125 European adults of ∼30 years of age, and Chumlea's KH equations, which are formulated from a large nationally representative sample of 4750 elderly aged 65+ years, specific for the different races (Hispanic and non-Hispanic whites and blacks) in the United States.
The relocation problem was formulated from a public housing project.
This prediction model is formulated from a statistical analysis derived from the MV cost distribution.
The activity was formulated from a research project to develop a carbon nanofiber (CNF) sensor for glucose detection.
A case study is formulated from a simulated environment for demonstrating the application of the EPS system.
The O/W emulsion was formulated from a commercial oil concentrate (1 wt % in distilled water) used in metalworking processes.
The porcelain tile is a ceramic product with high technical and aesthetic performance, whose composition is formulated from a mixture of clay or kaolin, quartz and feldspar.
The stress transfer mechanism is formulated from a microscopic point of view, and the engineering attention is chiefly directed at coupled cyclic pullout and transverse shear.
