“I had the pleasure to work with David on several key projects. David's thourough understanding of the both the technical and commercial aspects of the business were invaluable. His results driven approach helped us develop new product offerings quick and ahead of schedule. He is an asset to any organization.”
Pittsburgh, Pennsylvania, United States
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Activity
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Traditional aerospace gaskets and seals are difficult to apply, requiring extensive manual labor and rework. Save time and reduce costs in your…
Traditional aerospace gaskets and seals are difficult to apply, requiring extensive manual labor and rework. Save time and reduce costs in your…
Liked by David Bem
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Our PPG MoonWalk® automated paint mixing system is now on tour in the United States. In two colorful trucks, the revolutionary system from our…
Our PPG MoonWalk® automated paint mixing system is now on tour in the United States. In two colorful trucks, the revolutionary system from our…
Liked by David Bem
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PPG’s full suite of coating solutions for OEMs and tiers in electrification enables safer batteries and increases manufacturing productivity
PPG’s full suite of coating solutions for OEMs and tiers in electrification enables safer batteries and increases manufacturing productivity
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Experience & Education
Publications
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03-P-18-Mixed alkali templating in the Si/Al=3 and 10 systems: a combinatorial study
Studies in Surface Science and Catalysis
A combinatorial approach is used to investigate mixed alkali templating in the Si/A1 = 3 and 10 zeolitic systems. The experimental design includes 15 high-symmetry alkali combinations of Li +, Na +, K + and Cs +, decoupled variations in total hydroxide and total alkali, and four digestion conditions giving 960 reactions. Compositional fields for BEA, ANA, MER, LTL and pollucite (ANA-Cs), interactions between alkali cations in the templating process, and the use of Principle Components Analysis…
A combinatorial approach is used to investigate mixed alkali templating in the Si/A1 = 3 and 10 zeolitic systems. The experimental design includes 15 high-symmetry alkali combinations of Li +, Na +, K + and Cs +, decoupled variations in total hydroxide and total alkali, and four digestion conditions giving 960 reactions. Compositional fields for BEA, ANA, MER, LTL and pollucite (ANA-Cs), interactions between alkali cations in the templating process, and the use of Principle Components Analysis to streamline the analysis of large XRD data sets are
presented.
Other authorsSee publication -
Synthesis of intermetallic nitrides by solid-state precursor reduction
Chem. Mater., 1993, 5 (4), pp 397–399
Other authors -
Synthesis, Electronic and Magnetic Characterization of the Ternary Nitride (Fe0.8Mo0.2)MoN2
Chem. Mater., 1995, 7 (10), pp 1824–1828
Other authors
Patents
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Process of parallel sample preparation
Issued US 6,806,093
An apparatus and process for forming an array of powder samples arranged in predefined locations where all samples have a flat surface in a common plane has been developed. A monolithic block having a main support section having at least N perforations from a first surface of the main support through a second surface of the main support in predefined locations, where N is the number of samples in the array is provided. The monolithic block also has a flat support section covering the…
An apparatus and process for forming an array of powder samples arranged in predefined locations where all samples have a flat surface in a common plane has been developed. A monolithic block having a main support section having at least N perforations from a first surface of the main support through a second surface of the main support in predefined locations, where N is the number of samples in the array is provided. The monolithic block also has a flat support section covering the perforations of the main support section. All N samples are loaded simultaneously with sample X in perforation X of the main support where X is an integer from 1 to N. A flat surface of each sample where the flat surfaces are a common plane is formed by forcing the samples within the perforations against the flat support. The samples are retained in position within the perforations against the flat support, and are made ready for analysis since the flat surfaces of the samples are in predefined locations and are all in a common plane
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Process of parallel sample preparation
Issued US 6,677,162
A process of forming an array of powder samples arranged in predefined locations where all samples have a flat surface in a common plane has been developed. A main support having at least N perforations from a first surface of the main support through a second surface of the main support in predefined locations, where N is the number of samples in the array is provided. The main support is equipped with a flat support temporarily attached to its first surface. All N samples are loaded…
A process of forming an array of powder samples arranged in predefined locations where all samples have a flat surface in a common plane has been developed. A main support having at least N perforations from a first surface of the main support through a second surface of the main support in predefined locations, where N is the number of samples in the array is provided. The main support is equipped with a flat support temporarily attached to its first surface. All N samples are loaded simultaneously with sample X in perforation X of the main support where X is an integer from 1 to N. A flat surface of each sample where the flat surfaces are a common plane is formed by forcing the samples within the perforations against the flat support. The samples are retained in position within the perforations against the flat support, and are made ready for analysis by exposing the flat surfaces of the samples by removing the flat support. The exposed flat surfaces of the samples are in predefined locations and are all in a common plane. Alternatively, the flat support may be permanently attached to the main support
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Process and composition for removing toxins from bodily fluids
Issued US 6,579,460
A process and a composite for removing toxic cations and anions from blood or dialysate is disclosed. The process involves contacting blood or dialysate with a shaped ion exchange composite to remove ammonium and phosphate ions. The composite is a mixture of an anion exchange composition such as zirconia and a microporous cation exchange composition formed into a shaped article and optionally containing a binder such as hydrous zirconium oxide.
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Process for removing toxins from bodily fluids using zirconium or titanium microporous compositions
Issued US 6,332,985
A process for removing toxins from fluids, such as bodily fluids or a dialysate solution, is disclosed. The process involves contacting the fluid with a microporous ion exchanger to remove toxins in the fluid.
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Process for removing pollutants from aqueous streams
Issued US 6,814,871
A process for removing pollutants from aqueous streams is disclosed. The process involves contacting the stream with a shaped ion exchange composite to remove ammonium and phosphate ions. The composite is a mixture of an anion exchange composition such as zirconia and a microporous cation exchange composition formed into a shaped article and optionally containing a binder such as hydrous zirconium oxide.
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Process for removing toxins from blood using zirconium metallate or titanium metallate compositions
Issued US 6,099,737
A process for removing toxins from blood is disclosed. The process involves contacting the blood with a microporous ion exchanger to remove toxins in the blood. Alternatively, the blood can be contacted with a dialysis solution which is then contacted with the ion exchanger
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Family of microporous indium silicate compositions
Issued US 6,007,790
A new family of crystalline and microporous compositions having indium and silicon as essential framework elements have been synthesized. These compositions are characterized by unique x-ray diffraction patterns and an empirical formula of: where A is a cation such as sodium or potassium and M is a metal having a valence of +3, +4 or +5 such as iron (+3), titanium (+4) and niobium (+5).
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Zirconium silicate and zirconium germanate molecular sieves and process using the same
Issued US 5,891,417
A new family of crystalline molecular sieves have been synthesized. These compositions have a microporous structure of ZrO.sub.3 octahedral units, and at least one of SiO.sub.2 tetrahedral units and GeO.sub.2 tetrahedral units. Optionally, the molecular sieves contain M metals such as titanium, niobium, or tin. These novel molecular sieves are prepared hydrothermally from a reaction mixture composed of reactive sources of the components.
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Zirconium silicate molecular sieves and process using the same
Issued US 5,888,472
A new family of crystalline molecular sieves have been synthesized. These compositions have a microporous structure of at least ZrO.sub.3 octahedral units and SiO.sub.2 tetrahedral units. Optionally, the molecular sieves contain M metals such as titanium or tin. These novel molecular sieves are prepared hydrothermally from a reaction mixture composed of reactive sources of the components. Additionally, these molecular sieves are useful for the selective adsorption of ammonium ions.
Languages
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English
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Organizations
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American Chemical Society
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- Present
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