High Tech Separations News articles from September 1 1997

High Tech Separations News archives from September 1 1997

Dow Develops Stationary Phases.
September 1, 1997... The goal of chromatographic processes is the complete separation of components in a mixture. Demand is increasing for the better isolation of enantiomerically pure forms of biologically active chiral compounds to investigate relationships...

Good Candidate for Automation.
September 1, 1997... Gel permeation chromatography (GPC) is used to characterize the molecular weight of polymers. With the introduction of low angle laser light scattering and differential pressure viscometry detectors, GPC has become increasingly powerful....

Dionex Commercializes More Products.
September 1, 1997... Dionex has introduced two new chromatography products. The company's DX-120 ion chromatograph is said to be the most affordable, compact, reliable, and easy-to-use such device available. Preconfigured for high throughput isocratic...

Modeling in a Fixed, Annular Bed.
September 1, 1997... Although ion exchange chromatography (IEC) increased use in a range of diverse fields, most of the new applications still apply cylindrical column ion exchange beds. IEC processes involve ion exchange in essentially a one dimensional, linear...

Compressed Bed Improves Performance.
September 1, 1997... Conventional high performance liquid chromatography (HPLC) involves the passage of a sample through a bed of beads. Although it is desirable, it is not possible to achieve a perfectly packed bed. Heterogeneities in packed beds give rise to...

Biospecific Separation of Monoclonals.
September 1, 1997... Continuous simulated moving bed (SMB) chromatography processes have been developed mainly for the large scale separation of low molecular mass compounds in the petrochemical and food processing industries. Affinity chromatography is a high...

Simulated Moving Bed Technique.
September 1, 1997... Simulated moving bed (SMB) chromatography techniques are suited to commercial size separation processes. In continuous moving bed chromatography, the stationary phase moves relative to the feed and mobile phase inputs and the extract and...

Method Identifies Plant Oils.
September 1, 1997... Analyzing plant oils is important in the food industry. Because they are complex mixtures of triglycerides (TGs) which have very similar chemical and physical properties, complete separation of plant oils is very difficult. Although TGs in...

Yissum Produces Thin Layer Plates.
September 1, 1997... Rapid progress in the production of chromatographic media for high performance liquid chromatography (HPLC) and gas chromatography (GC) has not been matched by similar progress in thin layer chromatography technology. This is probably due to...

BioSepra Forms Partnership.
September 1, 1997... BioSepra, Inc. (111 Locke Dr., Marlborough, MA 01752; Tel: 800/752-5277, Fax: 508/480-8785) formed a consortium among BioSepra S.A., its French subsidiary; British Biotech plc, U.K.-based Oxford Asymmetry; and Denmark-headquartered Upfront...

Perkin-Elmer, PerSeptive to Merge.
September 1, 1997... Perkin-Elmer Corp. (761 Main Ave., Norwalk, CT 06859-0012; Tel: 800/762-6923) and PerSeptive Biosystems (500 Old Connecticut Path, Framingham, MA 01701; Tel: 508/383-7700, Fax: 508/383-7880) will merge. The companies have signed a definitive...

Briefly Noted:.
September 1, 1997... * For the 3 months ended June 30, 1997, BioSepra, Inc. (111 Locke Dr., Marlborough, MA 01752; Tel: 800/752-5277, Fax: 508/480-8785) recorded net revenues of $2.3 million and a net loss of $0.6 million, or $0.07 per share. These results...

Generic Alternative to Procardia XL Readied.
September 1, 1997... Mylan Laboratories, Inc. (1030 Century Bldg., 130 7th St., Pittsburgh, PA 15222; Tel: 412/232-0100) filed a paragraph IV Abbreviated New Drug Application for a generic alternative to Procardia XL, a sustained-released nifedipine product with...

Vesosomes Hold Materials Longer.
September 1, 1997... Closed lipid membranes (vesicles) tend to leak drugs rapidly. To help prevent this leakage, Joseph A. Zasadzinski and his co-workers Scott Walker and Michael Kennedy of the University of California Dept. of Chemical Engineering (UCSB,...

Dimethicone as an Adult Wipe.
September 1, 1997... Advanced Polymer Systems, Inc. (3696 Haven Ave., Redwood City, CA 94063; Tel: 415-366-2626) has agreed with Procter & Gamble to collaborate in producing a dimethicone-delivering adult wipe. Advanced Polymer Systems will contribute its...

Inorganic Microtubes Deliver Antifoulants.
September 1, 1997... The antifouling agents used by the U.S. Navy on ship hulls are typically environmentally unfriendly. Therefore, the release rate of these agents must be modulated or controlled to keep their release into the environment at acceptable--as well...

Simple Laser-Based Detection Method.
September 1, 1997... Capillary electrophoresis offers advantages in separating analytes; however, the diameter of the columns used results in short optical absorption path lengths. As a result, conventional absorption detection methods offer limited sensitivity....

Fluorescent Tags Carry Dye Molecular Pairs.
September 1, 1997... Considerable academic interest is being paid to identifying and quantifying simultaneously a number of the components present in complex mixtures. One application area where this feat is desirable is in capillary electrophoresis DNA...

Electrokinetic Membrane Fractionates Proteins.
September 1, 1997... Only a small portion of the thousands of proteins that can be visualized with two-dimensional (2-D) polyacrylamide gel electrophoresis (PAGE) are present at sufficient levels for chemical analysis. Prefractionating samples prior to 2-D PAGE...

Single-Use Systems for DNA Sequencing.
September 1, 1997... Gene-PAGE and Gene-PAGE PLUS from Amresco, Inc. (30175 Solon Ind. Pkwy., Solon, OH 44139; Tel: 800/448-4442 or 216/ 349-1313, US Fax: 216/349-1182, International Fax: 216/349-2441) are single-use modified systems for DNA sequencing that offer...

Miniature GC/MS for Field Operations.
September 1, 1997... Scientists at NASA's Jet Propulsion Laboratory (JPL, 4800 Oak Grove Dr., Pasadena, CA 91109; Tel: 800/832-4575) designed a micro-gas chromatograph/mass spectrometer (GC/MS) for field measurement of the concentrations of volatile compounds and...

Chemical Analysis Taken into the Field.
September 1, 1997... Doctors needing chemical analyses such as blood tests to make life-saving diagnosis and treatment decisions soon won't have to lose precious time waiting for results to come back from the lab. Hand-held sensor technology developed at the...

Gold, DNA Improve Disease Detection.
September 1, 1997... Researchers at Northwestern University (Evanston, IL 60208) have combined gold and DNA in an innovative way that could lead to techniques for detecting many types of diseases. Screening for genetic and pathogenic diseases, i.e., those...

Brigham Young Uses Macrocyclic Extractants.
September 1, 1997... Researchers at Brigham Young University (BYU) discovered how to "rapidly" selectively separate metal cations using macrocyclic extractants. Investigators John D. Lamb, J.S. Bradshaw, R.B. Shirts, R.M. Izatt, (BYU, Department of Chemistry,...

Lariat Ethers Lasso Metal Ions.
September 1, 1997... Lariat ethers easily lasso metal ions out of liquids as demonstrated by research at Texas Tech University. Lariat ethers have a side arm with one or more potential coordination sites is attached to a crown ether ring. The goals of this...

Dye Removal with Bagasse.
September 1, 1997... Agricultural resources represent a cheap and environmentally safe source of material for preparing ion exchangers to remove metals and color from water. Such materials should be structurally stable under mildly acidic or basic aqueous...