New Products J.T.Baker RESEARCH ® PRODUCTS
Separate thousands of racemic mixtures by chromatography
Typical Separation COLUMN: BAKERBONO CHiral (RP-7103-0) 25 cm χ 4,6 mm (.0.
VG12-250 Computer-Controlled Quadrupole MS Data System is operated via the data system keyboard. Standard features include automatic data acquisition, analysis and presentation, sequential E I + / C I + / C I — scans, high-sensitivity quadrupole with prefilter, and mass range of 1200, 1500, or 2000 amu. VG Analytical Ltd. 403
MOBILE PHASE: 5 '.-.. Isopropyl Alcohol in Hexane FLOW RATE: 2 ml'mm
X-ray Fluorescence Spectrace 4000 Series XRF Analysis System includes a multiple-sample chamber, a built-in 256K memory ana lyzer, a 30-mm X-ray detector, a 30-kV Rh target X-ray tube, dual 5 1 / 4 -in. floppy disks, a control/display terminal, a de tachable keyboard, and complete XRF software based on a CP/M-86 operating system. Tracor Xray 414
Chemicals PCB Screening Kit Clor-N-Oil Kit detects the presence of PCBs in dielectric fluids. The kit can ac curately provide screening of samples above and below 50 ppm PCB. It con sists of reagents packaged in glass am pules; the final color of the solution in dicates the presence or absence of PCBs. Dexsil Chemical Corp. 419
Polymer Analysis Solvents Decahydronaphthalene and 1,2,4-trichlorobenzene have been added to a line of solvents for GPC and polymer additive analysis. Trichlorobenzene is an alternative to o-dichlorobenzene for analysis of polyolefins and other poly mers. Decahydronaphthalene is useful primarily for determination of polymer additives such as BHT and also for GPC of polymers. Burdick & Jackson 422
Research Enzymes Endoglycosidase F is useful in estab lishing the molecular weights of the
DETECTION: UV 254 nrn
protein moiety of glycosilated proteins and peptides and in establishing the in volvement of sugars in the recognition of one molecule by another. Endoglycosidase H is useful in determining both the molecular weight of the protein moiety of glycoproteins and their inher ent number of oligosaccharide chains. New England Nuclear 421
Protease Detection Tablets Protease Substrate Gel Tablets provide a method for preparing agar diffusion plates used in detecting protease activi ty. They are useful for detecting con taminating proteases in purified protein or nucleic acid preparations. The tab lets produce a 1 % agar gel containing a bovine casein preparation in a Tris buffered physiological saline solution at pH 7.2. Bio-Rad Laboratories 423
CsCI Two grades of CsCI for density gradient centrifugation are available—optical grade, with low optical absorbance for applications where strict control on the limits of UV absorption is required, and reagent grade, for applications where extremely high optical purity is not nec essary. Pharmacia Fine Chemicals 424
Reverse Transcriptase System Reverse Transcriptase System (32P) in creases yields of double-stranded cDNA (ds-cDNA) from mRNA templates and eliminates unnecessary purification steps. System includes all enzymes necessary to make ds-cDNA as a final product. New England Nuclear 425
PERFORMANCE: Capacity Factor (K) = 5.0 Plates per metet (NfM) 25.000 Separalion Factor
