Primus Chemical Co. Ltd
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Introduction: Mineral trioxide aggregate (MTA), white and gray, has many uses in endodontic therapy but is limited by its difficult handling characteristics. This study compared the physical and chemical properties of white MTA (WMTA) with three experimental root-end filling materials: Capasio (Primus Consulting, Bradenton, FL), Ceramicrete-D (Tulsa Dental Specialties/Argonne National Laboratory, Argonne, IL), and Generex-A (Dentsply Tulsa Dental Specialties, Tulsa, OK).
Methods: The setting time and radiopacity were tested using International Organization for Standardization (ISO) 6876 methods. Compressive strength was measured following the ISO 9917 method. The pH of the materials was measured after mixing. A novel test was developed for washout resistance of the materials immediately after placement. Data were compared by analysis of variance and Sidak post hoc analysis (p
Results: The setting time of Generex-A was half that of WMTA. All materials met the ISO 6876 requirements for radiopacity. The compressive strengths after 7 days decreased in this order: Generex-A>Capasio>WMTA>Ceramicrete-D. The initial pH of Capasio and Generex-A were alkaline, similar to WMTA, whereas that of Ceramicrete-D was acidic. Significantly, alternative materials remained in situ after the washout test, whereas WMTA was displaced from the retropreparations.
Conclusions: The clinical handling and washout resistance of the alternative materials were far superior to WMTA. The radiopacity, compressive strength, and washout resistance make Generex-A and Capasio materials suitable for further study. Ceramicrete-D was weaker, less radiopaque, and initially acidic.
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His unconventional path to the outer rim of winemaking in the Pacific Northwest began in the Midwest. Primus graduated with a chemical engineering degree from Purdue University in West Lafayette, Ind., but an elective requirement along the way landed him in a wine appreciation class led by internationally renowned Dr. Richard Vine.
Life for Primus seems to be about taking a path all his own. He pronounces his last name as premise, which differs from how family elders say the surname. Political activism found the chemical engineering student on the streets of Seattle for the World Trade Organization conference, and what he witnessed Nov. 30, 1999, changed his life.
He and his childhood sweetheart, Darla Jungmeyer, enjoyed living in the Willamette Valley, but they returned to their home state of Missouri, where they hoped to plant vines on limestone soils and launch a family winery. Alas, the plan unraveled quickly.
Primus embraced his move to San Juan Vineyards in part because of a deep-seated love for aromatic whites wines. The infatuation began in France where he met up with a college friend who had winemaking and grape growing relatives in the Alsace.
Outdoor activities make San Juan Island a destination for tourists and a lure to those who hope to carve out a living while pursuing their dreams as kayakers, boaters and cyclists. An estimated 40 percent of the homes on the island are used merely as recreational property, which can make it especially difficult on merchants and restaurants during the shoulder and winter seasons.
Eric is the President and CEO of Great Northwest Wine. He is a journalist with more than 30 years of daily newspaper experience and has been writing about wine since 1998. He co-founded Wine Press Northwest magazine with Andy Perdue and served as its managing editor for a decade. He is a frequent wine judge at international wine competitions throughout North America and orchestrates 10 Northwest competitions each year.
Verde Clean Fuels produces a low-carbon renewable gasoline that doesn't come from petroleum. Compatible with standard internal combustion engines and leveraging existing infrastructure, our ready-to-use liquid fuel means there's no change to your everyday journeys - continue using your current automobile and refueling at the gas station as normal.
Originally founded in 2007 as Primus Green Energy, a number of years have been spent researching and developing our patented STG+ technology. Our demonstration facility has completed over 10,500 hours of demonstration plant operations.
Ernest Miller has over 25 years of experience in the commodity-driven energy sector. Ernie previously served as Chief Financial Officer for Rodeo Resources Incorporated, a company that invested in operated and non-operated E&P midstream and mineral interests from North America, South America and West Africa. Prior to joining Rodeo Resources, Ernie served as an Asset Manager and Director of Finance at Calpine Corporation, where he developed and financed over 4,500 MW of industrial cogeneration facilities at six locations representing more than $4.0 billion in capital investment. Ernie earned a Master of Natural Resources from Texas A&M University and a Bachelor of Science from the University of the South.
Laura Morris is an energy industry professional with 15 years of capital projects and contracting experience. Laura serves as Senior Project Manager, developing and executing FEED/EPC strategies for VCF facilities. Previously Laura was at ExxonMobil, where she held roles supporting upstream and downstream major capital projects and production operations, including a multibillion-dollar offshore production project. She also held leadership roles in the procurement organization and has participated in a number of special projects regarding process efficiency, ERP systems, and business restructuring. Laura holds a degree in Industrial Engineering from Texas A&M University.
Curtis Hbert, Jr. is the former Commissioner and Chairman of the Federal Energy Regulatory Commission (FERC), where he served from November 1997 to September 2001, and a former Executive Vice President for Entergy Corporation, where he served from September 2001 to July 2010. Mr. Hbert is currently a Partner with the Brunini Law Firm, where has advised energy companies and corporations throughout the globe on numerous matters, including building accountability and transparency into corporate governance, improving the quality of regulatory filings, reporting and relationships, and executing complex, structured regulatory settlements since July 2012. He also served as a visiting scholar with the Bipartisan Policy Center in Washington, where he co-chaired the Energy Reliability Task Force and the Cybersecurity Task Force. Previously, Mr. Hbert served as Chief Executive Officer of Lexicon Strategy Group, an energy, finance and regulatory law advisory firm, from August 2010 to July 2012. Mr. Hbert has broad and deep experience in multiple segments of the energy sector, spanning exploration and production, natural gas transportation, electric generation and distribution, chemicals, and mining. He brings a thorough knowledge of national and international energy markets, policy, and regulatory processes. Mr. Hbert also spent years in the telecommunications, transportation, and water/sewage sector on regulatory filings and administrative hearings. Mr. Hbert serves as an independent director, a member of the audit committee, a member of the nominating committee and the chairman of the compensation committee of Bluescape Opportunity Acquisition Corp. and has served in these roles since September 2020.
Mr. Siegler earned a Master of Science in Electrical Engineering from Stanford University and a Bachelor of Science in Electrical Engineering from the United States Naval Academy, where he graduated with distinction.
Petroleum engineering is one of the highest-paid jobs in oil and gas production. A petroleum engineer engaged in practically every stage of the evaluation, development, and production in oil and gas fields. Their goal is to maximize efficiency in hydrocarbon exploration and address any operational issues.
Chemical engineers design and build chemical manufacturing processes. They use scientific and mathematical expertise to improve chemical processing systems and equipment. In addition to analyzing process data, they design strategies for optimizing plant operations.
Petroleum engineering courses include petroleum drilling engineering, petroleum engineering design, drilling and well completion, drilling fluids, energy in the modern world, and petroleum production at the undergraduate level.
The question arises here is can a chemical engineer work as a petroleum engineer? As mentioned, chemical engineering courses overlapping with petroleum engineering give the possibility to a chemical engineer to work as a petroleum engineer.
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