S S T Ά compos
BRIEFS Properties of an Asymmetrical Flow Field-Flow Fractionation Channel Having One Permeable Wall 1332 An asymmetrical flow FFF channel is developed, and its properties are examined both theoretically and experimen tally. A mixture of proteins is fractionated to illustrate the potential for macromolecular separations. Karl-Gustav Wahlund and J. Calvin Giddings*, Department of Chemistry, University of Utah, Salt Lake City, Utah 84112 Anal. Chem., 59 (1987)
TD*rOR
ATLAS Sulfur System based o - J ^ ^
technical intormawn and a P P ass stance contact: g441 e a y t n o r n e O r ^ ^
Pnr
Houston, Texas '
Tracor Atlas
116
c i v 713/462-1831
"Experience Keeps Us a Step Ahead" CIRCLE 156 ON READER SERVICE CARD
Forensic Science, Second Edition
κ*ι Geoffrey Davies, Editor Northeastern University 388 pages (1986) LC 85-28688 Clothbound ISBN 0-8412-0918-9 US & Canada $64.95 Export $77.95 Paperbound ISBN 0-8412-0919-7 US & Canada $39.95 Export $47.95 Order front: American Chemical Society Distribution Dept. 14 1155 Sixteenth St., N.W. Washington, DC 20036 or CALL TOLL FREE 800424-6747 and use your credit card!
Examines major current develop ments in forensic science, from education and training, through professional ethics and morality, to major areas of forensic practice and research. Specific topics discussed include forensic toxicology, serology, and microscopy; detection of fire arms and explosives residues; foren sic drug and breath-alcohol analyses; and fingerprint science. Gives a clear perspective of the potential and limitations of physical evidence in the administration of justice.
CONTENTS Forensic Science Education · On Being an Expert · Ethical and Moral Dimensions • Ethical Issues · Forensic Science in a Liberal Arts Curriculum · Forensic Sci ence Courses · In-Service Training · Training and Research in the FBI · Prac tice and Training in Canada · Graduate Education · Forensic Science Research · Forensic Toxicology · Drug Analysis by HPLC · Breath-Alcohol Analysis · Ge netic-Marker Systems · Firearms Residue Detection · Explosive Residues · Recov ery of Accelerant Residues · The Science of Fingerprints · Forensic Microscopy · Trace Evidence
612 A · ANALYTICAL CHEMISTRY, VOL. 59, NO. 9, MAY 1, 1987
Retention by Electrical Field-Flow Fractionation of Anions in a New Apparatus with Annular Porous Glass Channels 1339 Polystyrenesulfonate and chromium phthalocyaninetetrasulfonate are retained in porous Vycor glass channels using high- and low-conductivity aqueous carrier. Retention ratios differ considerably from theoretical expectation, but mea sured and theoretical plate heights agree when the necessary parameters are estimated from experimental data. Joe M. Davis, F.-R. F. Fan, and A. J. Bard*, Department of Chemistry, University of Texas at Austin, Austin, Tex. 78712 Anal. Chem., 59 (1987) Direct Determination of /3-Lactam Antibiotics by Circular Dichroism 1349 The CD spectra of nine penicillins and three cephalosporins are characterized in pH 5.4 buffer. Discrimination is not possible among the members of a group, but distinction between groups is easy. Neil Purdie* and Kathy A. Swallows, Department of Chemistry, Oklahoma State University, Stillwater, Okla. 74078-0447 Anal. Chem., 59 (1987) Do Optical Sensors Really Measure pH?
1351
The performance of optical and electrochemical sensors for determination of hydrogen and other ion activities is criti cally evaluated. Jiri Janata, Center for Sensor Technology, University of Utah, Salt Lake City, Utah 84112 Anal. Chem., 59 (1987)
Correspondence Tubular Microporous Membrane Entrapped Enzyme Reactors for Flow Injection Analysis 1356 Hoon Hwang and Purnendu K. Dasgupta*, Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Tex. 79409-4260 Anal. Chem., 59 (1987)
