NEW PRODUCTS
Chemicals and materials 201 Urethane curative. Caytur 21, heat-activated material, can be mixed with prepolymers at ambient temperatures without reacting; used for manufacture of polyurethane coatings for fabric-based products such as lifejackets. Uniroyal 202 Flame-retardant. Additive, LSFR, for flexible PVC, reduces smoke generation up to 35%; increases thermal stability. Laurel Industries 203 Polythioether. Permapol P875, mercaptan-terminated mercaptan functional polymer that complements hydroxy materials, is designed for use in room-temperature curing of high-performance sealants, adhesives, and elastomers. Products Research & Chemical 204 Color concentrates. Broad line featuring complete range of colors is resistant to outdoor weathering; designed for use in rigid PVC profile extrusions such as siding and window lineals. PMS Consolidated 205 Powder alloy. MicroFlo, ultrapure, noncrystalline, nickel-based material, is designed for maintenance and repair applications that require resistance to corrosion, abrasion, erosion, and metal-tometal friction. Eutectic 206 AntHoam material. Antifoam 1809-T prevents seawater from foaming in evaporators and helps reduce overall energy consumption. Hodag Chemical 207 Rosin size solution. Dynakoll VS 50 has 50% solids content, is readily dispersible, and is stable when frozen and thawed; suitable for paper machines. Akzo Chemie America 208 Biological additive. Microcat-RX buffers impact of toxic or difficult-to-degrade organic compounds in biological wastewater treatment plants; immobilizes low-level 54
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organics while repopulating the system with preselected, adapted microorganisms. Bioscience Management 209 Thermoplastic colorant. Black 9838-2L made for injection and blow molding resists settling for minimum of 8 weeks. Pigment Dispersions 210 Silicon carbides. Ceramic grades of beta silicon carbide are produced as freeflowing grain that can be used as produced or can be further processed to finer grits in various grades. Superior Graphite
Literature 211 Ultrapure chemicals. Catalog lists specifications for 59 chemicals used in DNA, RNA, and protein sequencing, synthesis, and recombinant work. American Research Products 212 Research chemicals. Specializing in organo-acetylene and organo-fluorine compounds, catalog contains about 500 entries; includes physical properties. Farchan Laboratories 213 Clamps, weld fittings. Comprehensive listing gives specifications for stainless steel components used in pharmaceutical processing. Valex 214 HPLC solvents. Reference manual aids in mobile phase selection, system troubleshooting, and safe solvent handling. J. T. Baker Chemical 215 Tttrators. 12-page bulletin describes instrumentation for precise quantitation of moisture in variety of samples in such fields as chemicals and pharmaceuticals. Fisher Scientific 216 Bulk storage tanks. Brochure describes complete line of Nalgene tanks with capacities from 550 to 22,000 gal. Nalge 217 Chromatography. 64page catalog lists line of valves, fittings, and tubing for
use in LC and HPLC. P. J. Cobert Associates 218 Research products. 226page reference book lists more than 1500 radiochemicals and related products; includes cross-reference of products and technical sections for products used in molecular biology, cell biology, and radionuclides. Du Pont NEN Research Products 219 Specialty surfactants. 8-page guide gives properties, applications, and specifications for 120 products. Jordan Chemical 220 HPLC and GC. 12-page digest of GC, HPLC, and chemical standard news describes several developments in these fields. Supelco
Labwareand instruments 221 Fluid dispenser. Unit dispenses almost any fluid in both constant flow rate and batch volumes; suitable for laboratory or pilot plants. Penn Systems 222 DNA synthesizer. Easyto-operate benchtop system provides automated synthesis of single-stranded DNA; performs full range of applications, from fast production of hybridization probes to synthesis of mutagenesis primers. Beckman Instruments 223 LC autosampler. Electrically driven 100-vial automatic unit operates up to 6000 psi and can be used to upgrade all existing HPLC systems. Shimadzu 224 Uquid scintillation. Twocomponent system uses aqueous solution of quaternary ammonium compounds to digest soft tissue, hair, or fingernail samples at room temperature; toluene-based solubilizer gives high counting efficiencies. Isolab 225 Isolation valves. Diaphragms of 100% Du Pont Teflon isolate corrosive or high-purity fluids from all so-
lenoid parts in chromatographic instrumentation. Automatic Switch 226 Liquid chromatography. Slide/tape training program aids liquid chromatographers and laboratory technicians in diagnosing and correcting problems. Savant Audiovisuels 227 Differential refractometer. Model 410 allows detection of samples at very low concentrations over refractive index range from 1.00 to 1.75; can be used with any HPLC or GPC system. Millipore 228 Moisture analysis. Ondyne 1900, consisting of up to 8 sensor probes and display and control module, remotely monitors moisture content, temperature, and pressure of gas or liquid sample streams. Endress + Hauser Instruments 229 Freeze dryer. Benchtop unit allows operator to freezedry and fix heat-sensitive tissues in one chamber. FTS Systems
Plant equipment end instruments 230 Membrane filter bags. Qore-Tex bags, with backing of homopolymer acrylic felt, are suitable in applications in which acid attack or high moisture content is likely to occur. W. L. Gore & Associates 231 Pump. Monodisc unit has simple design with opposing nitrile disks instead of diaphrams; disks create suction and discharge and also induce flow. Mono Group 232 Butterfly valve. Unit with advanced thermoplastic highpressure molding seals at 250 psi and is only bidirectional butterfly valve rated at 200 psi for dead-end service without backup flange. Nibco For Information on these Items or numbered ads, see Reader Service Card
