New Products

Worthington Biochemical Corp. of Freehold, N.J., offers a cell isolation kit called the Cardiomyocyte Isolation System. The kit contains materials and directions for five separate tissue dissociations of up to 12 hearts each. Individual vials contain Hank's Balanced Salt Solution, Worthington Purified Trypsin, Soybean Trypsin Inhibitor, Purified Collagenase, and Leibovitz L-15 powdered media. Also included with instructions are five Falcon cell strainers and a phenol red color card for checking pH. All kits use purified enzyme preparations, rather than crude; according to the company, this ensures additional consistency and yield of viable cells at the bench. Additionally, all kits have been use-tested on neonatal rat hearts. Unisyn Technologies, based in San Diego, has released its Cell-Pharm System 1000 research- to pilot-scale cell culture system for producing biomolecules. Designed with hollow fiber bioreactor technology, the system provides highly concentrated, debris-free supernatants to simplify downstream purification, improve yields, and broaden cell production range, according to the manufacturer. The Cell-Pharm System 1000 is a self-contained, bench-top unit that does not require an incubator, and operates with a dual-head peristaltic pump providing air and medium supply. The system features flow diagrams and LED displays, and comes with an automated pH control that maintains optimal levels for increased cell productivity, according to Unisysn. AccuVac Test Kits, from Hach Co. of Loveland, Colo., supply the colorimetric analysis researcher with six different models for monitoring chlorine, iron, dissolved oxygen, nitrate, ozone, and phosphate. Each test kit is supplied with 25 vacuum-sealed AccuVac Ampuls. When the ampul tip is broken, it is designed to automatically draw the correct amount of sample into the vial; according to Hatch, this eliminates the need for reagent mixing or measuring and avoids sample cell cleanup and cross-contamination. The AccuVac kits also feature a continuous gradient color disk that replaces color steps and standards found in other tests. Users obtain results by holding the comparator box to a light source and rotating the disk until the color of the reacted sample matches the color density of the disk. Microscope Liquid Cell, from Spectra-Tech Inc. of Stamford, Conn., is available for FT-IR microscopes for infrared analysis of biological liquids. The kit features a fixed pathlength and sealed environment for liquid transmission analyses. The cell has a nominal 7 micron path length for analyzing proteins in solution, which also allows it to analyze other biological solutions and liquid samples that are strongly absorbing in the infrared region. Additionally, the Microscope Liquid Cell will work with both the 15x and 32x microscope objectives when used with Spectra-Tech or Nicolet FT-IR microscopes. The kit comes with a Micro Compression Cell, a gold-coated 13 x 1 mm barium fluoride window, and a cell insert Gelman Sciences of Ann Arbor, Mich., has made available its Ion Chromatography Acrodisc Syringe Filter, specifically designed and certified for ion chromatography sample filtration. Each lot has been sampled and tested by ion chromatography for low-conductivity-detectable extractables to ensure consistent results of ionic species analyses, according to the company. The Acrodisc contains Supor membrane, an inherently hydrophilic polyethersulfone in a polypropylene syringe filter housing. It is available in 0.2 and 0.45 mm pore sizes at 25 and 13 mm diameters. For lower hold-up volume, the 13mm Acrodisc is suitable for sample volumes of 10 mL or less, while the 25 mm Acrodisc is suitable for 2 mL to 100 mL samples. Medical Systems Corp., located in Greenvale, N.Y., has introduced its Digitimer Multistim multi-channel tissue bath stimulation system. The device is designed to facilitate multiple isolated tissue bath stimulation with flexible control of stimulation voltage and timing for each bath. Applications include isolated smooth muscle preparations for vas deferens and gut arteries, as well as preparation of isolated coronary and skeletal muscles. Isolated tension measurements in muscle are also possible. The Multistim is a flexible modular stimulator; users can choose from among more than 20 components in order to configure the optimum system for each experiment. A 19-inch rack-mounted case accommodating up to 10 stimulation channels and a half-width bench-top case accommodating up to four channels are offered. Several stimulator channel modules are also available with voltage protocols up to 100 volts, and with current capacities up to 2.5 amps per channel. Overload cut- out protection is standard. Also offered is a choice of timing and triggering modules that allow implementation of pulse train and other stimulus delivery protocols.

New Products

The Scientist Staff

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