Briefs Capacitive Integration to Produce High Precision Isotope Ratio Measurements on Methyl Chloride and Methyl Bromide Samples 1930 T h e RSD of measured ratios for methyl chloride is 13 parts in 10 6 while t h a t for methyl bromide is 7 parts in 10 6 . John F. Willey and James W. Taylor,* Department of Chemis try, University of Wisconsin, Madison, Wis. 53706 Anal. Chem., 50 (1978)
Correspondence
Copolymers, Polyblends, and Composites Advances in Chemistry Series No. 142
High-Resolution Nulcear Magnetic Resonance Spectrometry in Thermotropic Nematic Liquid Crystals with Negative Diamagnetic Anisotropy
1934
Ludwig Pohl* and Rudolf Eidenschink, E. Merck, Darmstadt, Germany Anal. Chem., 50 (1978)
Norbert A. J. Platzer, Editor A symposium sponsored by the Division of Industrial and Engineering Chemistry, and cosponsored by the Division of Polymer Chemis try, the Division of Organic Coatings and Plas tics Chemistry, and the Division of Cellulose, Wood, and Fiber Chemistry of the American Chemical Society. This timely collection of thirty-eight papers is comprehensive and unique in its coverage of the latest research results on copolymers, polyblends, and composites which are used to toughen brittle polymers with elastomers, to reinforce rubbers with active fillers, and to strengthen or stiffen plastics with fibers or minerals.
Thermal Effects upon Spatial Mode Structure of a Linear Flashlamp-Pumped Dye Laser 1936 John R. FitzPatrick and Edward H. Piepmeier,* Department of Chemistry, Oregon State University, Corvallis, Ore. 97331 Anal. Chem., 50 (1978)
Exchange of Comments on Interferometric Concentration Determination of Dextran after Gel Chromatography 1937 F. El-Hosseiny* and R. D. Gilbert, Fiber Sciences Department Weyerhaeuser Company, 3400-13th Avenue SW, Seattle, Wash. 98134, and Lars Hagel, Pharmacia Fine Chemicals AB, Box 175, S-751 04 Uppsala, Sweden Anal. Chem., 50 (1978)
Aids for Analytical Chemists
Specific topics include: • determination of MWD in homopolymers; liquidliquid phase transition phenomena • grafting kinetics of ABS; rubber-modified polymers; block copolymers; laminating resins; vinylene carbonate • polymerization and copolymerization behavior; covulcanization of elastomer blends 482 pages (June 1975) $34.50 clothbound (ISBN 08412-0214-1).
Programmable-Gain or Auto-Gain Amplifier
Highly Regulated Power Supply for Hydrogen or Deuterium Arc Lamps Used in Ultraviolet Spectrometry
Name Address State
1941
Ronald E. Edstrom, Department of Biochemistry, The Medical School, University of Minnesota, Minneapolis, Minn. 55455 Anal. Chem., 50 (1978)
SIS/American Chemical Society 1155 16th St., N.W./Wash., D.C. 20036 Please send copies of Wo. 142 Copolymers, Polyblends, and Composites at $34.50 per book. D Check enclosed for $ Ο Bill me. Postpaid in U.S. and Canada, plus 40 cents elsewhere.
City
1938
K. R. O'Keefe, Department of Chemistry, Colorado State Univer sity, Fort Collins, Colo. 80523 Anal. Chem., 50 (1978)
Zip
1176 A • ANALYTICAL CHEMISTRY, VOL. 50, NO. 13, NOVEMBER 1978
