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For over 120 years, Parr Instrument Company has been designing, manufacturing, and selling high quality laboratory instruments and apparatus for conducting chemical reactions and tests under heat and pressure and for testing fuels. Parrs extensive product line includes stirred reactors, pressure vessels, and high pressure tubular reactors for the study of catalytic and non-catalytic reactions in batch, continuous-flow, and multiple/parallel operation for the chemical, polymer, biofuels, hydrometallurgical, pharmaceutical, petroleum, and petrochemical industries. Custom designed complex reactor systems, built to the customers specifications and requirements are also provided. Parrs oxygen combustion calorimeters are used for the determination of the heat of combustion in solid, liquid, and refuse-derived fuels for the energy, educational, coal, and fuel testing industries. Parr also offers sample preparation vessels for extraction, digestion, and hydrothermal synthesis, as well as a line of vessels for cell disruption by nitrogen decompression.
Nexus is dedicated to providing the highest quality of service in the field of utilization review. We specialize in providing physician services to the utilization review and risk management industry through accurate, independent, evidence-based results which provide a high quality outcome. Our experienced physicians and professional administrative staff consistently prove to be a leader and beacon for the medical review industry.
Two Rivers is a 12 attorney law firm concentrating in the area of workers compensation litigation, primarily for employers and insurance companies, appellate practice and subrogation claims. We have offices strategicaly located Richmond, Virginia, the state capital and in Christiansburg in the New River Valley of Western Virginia. From these two locations, we practice across the Commonwealth. Two Rivers also practices in the District of Columbia and West Virginia.
4Liberty is a leading technical & professional services firm focused on energy & infrastructure. We manage large scale programs and projects for diverse clients across North America. We help utilities through the energy transition necessary to meet customer expectations, adhere to government mandates, and reach sustainable goals. We help commercial, government, and municipal customers implement the modern infrastructure needed to bolster security, improve connectivity, and ensure environmental and social justice.