suv database service celebrates 10th year
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Fluorene-9-BisPhenol Epoxy Resins-Heat Resistance Moisture Resistance Thernto-oxidative Stability
Acid Color Developer-Thermal Recording Material-Improved Image Retention
Phthalocyanine Thermosets-Thermal Stability Fire Resistance
Polyarylates-Thermal Stability Tensile Strength Chemical Resistance Electrical Properties
Headquarters In North America Weyl GmbH Ruetgers-Nease Corporation
Mannheim, Germany State College, PA hone [49] (621)7654 394 phone [1] (814) 231-9261
fax 7654 446 fax 238-4235
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Introducing the Durex™ metering pumps.
When it comes to consistent, high-pressure delivery, Durex metering ^ pumps make everything go smoothly. A new mechanical design gives you steady low-pulse flow from 0.05 to 30 mL/min and pressures to 5000 psi. The flow rate is set directly. No more fussing with micrometers and look-up tables. Expect years of trouble-free use. Durex pumps are built with the highest quality, corrosion-resistant materials and are backed by expert service. And the price won't p i j ruffle your budget. t l C I G X Durex metering pumps. CALL i-800-969-3533, FAX 1-707-224-0688 They re steady under pressure. © 1994, Eldex Laboratories, inc.
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SCIENCE/TECHNOLOGY
SUV database service celebrates 10th year STN International is 10 years old this month. Having first become operational in May 1984, the on-line system has grown to include such a sizable battery of science and engineering databases that modern chemists likely would find it difficult to function without them.
The accent on chemistry was there at the beginning, when the American Chemical Society's Chemical Abstracts Service (CAS) Division in Columbus, Ohio, joined with Fadiinformationzentrum (HZ) Che-mie, in Karlsruhe, Germany, to offer the CAS Registry, CA Files, and HZ Physics Briefs in one combined service. Chemical Abstracts itself had started CAS Online in 1980. The two organizations next invited the Japan Information Center of Science & Technology, Tokyo, to add its own databases, thus establishing service centers accessible to users on three continents.
STN continues to grow with the frequent addition of new databases from other organizations, called publishers. Publishers each transmit data to one of the service centers, but users can search any database from all three service centers. A search may shift among computers in Columbus, Karlsruhe, or Tokyo without the client being aware of it.
All of the publishers independently maintain, improve, and expand their databases and set pricing policies. The service centers independently solicit new databases and supply search assistance and support to users who contact them. The centers sometimes refer users to individual database publishers for detailed information. STN constantly adds new features to speed and expand searches.
In 1986, STN began offering the complete text of the Journal of the American Chemical Society, followed later by entire texts of Chemical & Engineering News and of all research journals of ACS, the Royal Society of Chemistry, Elsevier Science Publishing Co., VCH Verlagsgesellschaft, John Wiley & Sons, and the Association of Official Analytical Chemists International.
The first numerical database was added in 1987 with the offering of the Design Institute of Physical Property Data (DIPPR) from the American Institute of Chemical Engineers. Today, there are more than 20 numeric files on chemical, physical, and thermodynamic properties of materials.
Stephen Stinson
18 MAY 30,1994 C&EN
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