March 1998

Volume 12, #7The Scientist March 30, 1998 CLARIFICATION Date: March 30, 1998 In the article "DNA Vaccines Generate Excitement As Human Trials Begin" (R. Finn, The Scientist, 12[6]:9, March 16, 1998), an incorrect URL was given for the American Academy of Microbiology's colloquium report, "The Scientific Future of DNA for Immunizations." The correct URL is http://www.asmusa.org/acasrc/aca1.htm.

The United States patent system, as envisioned by Benjamin Franklin and provided for in the Constitution, has a mandate to stimulate innovation and commerce to benefit society. To accomplish this, inventors obtain patents to protect intellectual-property rights by creating temporary monopolies to market inventions without competition. A major tenet that "Basic research is the source of fundamental knowledge that eventually leads to innovation, technology development, and economic growth" (Rep.

Are we overproducing Ph.D.'s in biomedical sciences? If so, should we regulate future Ph.D. production? To address these questions, we need to examine the data. Biomedical Ph.D. production has increased dramatically. In 1995, United States institutions awarded 5,878 new Ph.D.'s in biomedical sciences, a 55 percent increase over the 3,791 degrees in 1985 (Washington, D.C., National Research Council, Survey of Earned Doctorates, unpublished survey). What forces drove this increase? The number

What to make of estrogen? Does the female sex hormone's potential to protect women, and even men, against an array of illnesses foreshadow a research bonanza? Or will its use, in natural and synthetic forms, always be compromised by serious side effects, including an increased risk of cancer? A steady flow of academic articles and announcements from university research centers indicates widespread interest in such questions, but the asking seems much easier than the answering. "Estrogen" is a

Controversies have always been a part of science, but scientists who have found themselves embroiled in hot debates often find them distasteful. Researchers say that at worst, scientific arguments can result in acrimony, with allegations of dishonorable behavior among combatants. Despite the potential for ill will, others insist that disputes can be conducted with mutual respect. Some scientists say controversies can invigorate and enhance interest--and result in important advances--in the cont

SequaStrip™ Tips from Embi Tec Mention multipipette tips for sequencing gels to DNA sequencers and see their eyes light up. Embi Tec, a San Diego-based company, is introducing to the sequencing community a handy device for loading sequencing gels that can save time and significantly reduce the effort required. SequaStrip™ Tips are the first and only eight-strip tips specially designed for sequencing gels. The strips make light work of gel loading; with them, you can load 64 wells

Piecing together components for gel electrophoresis and documentation can be a time-consuming and expensive venture. The components may not be compatible or their performance might not be optimal. With this in mind, Elchrom Scientific AG (Switzerland) has designed the SEA 2000 Submerged Gel Electrophoresis System. The system is distributed in the United States by AMRESCO Inc. (Solon, Ohio). The SEA 2000 Submarine Electrophoresis Unit The SEA 2000 is as unique system that allows you to control

Ribonuclease Protection Assay System Offered by PharMingen Human Apoptosis Multi-Probe Template Set. Autoradiograms of protection assays using human APO-2 template set and various cell lines. Quantitating expression levels, especially of rare mRNA species, has never been an easy task. Only a few options exist for doing this, and each has difficulties. The ribonuclease (RNase) protection assay, a sensitive and specific method for quantitating expression levels, has been around for close to 15 y

Date: March 30, 1998 Author: Laura DeFrancesco T he excitement over telomerase continues to mount as evidence accumulates that makes the connection between telomere length and cell lifespan likely to be more than a coincidence. The most recent findings show that the age span of cultured cells, normally limited to around 50 cell doublings--the so-called Hayflick limit, named for the scientist who first observed that the lifespan of cultured cells was finite--can be more than doubled by transfec

Date: March 30, 1998 Author: Jim Kling Table of Vendors So--the boss calls you into her office and tells you it's time to find another supplier of oligonucleotides. The custom house you've been using just went out of business, or maybe your team is preparing to delve into a new research project that calls for oligos. You scan the ads in several journals and do a quick internet search. Before you know it you've got a 'short' list of 50-100 suppliers. Wading through a sea of suppliers to find th

Date: March 30, 1998 Author: Jim Kling Tables of Vendors What's really going on here? That question used to puzzle bleary-eyed microscopists as they stared at slides of immobilized cells--dead cells, of course. Then along came the inverted microscope. Its unique design placed the light source above the sample and the magnifying objective below it, allowing these new microscopes to peer into live cells bathed in media. Suddenly, scientists had a new view of the neighborhoods and boroughs occupied

Contents Moral Might Self-Validation More Alzheimer's Progress Broader Role For Mobile DNA Preferential Hearing Special Delivery Perfect Pitch Genes Imaging Dsylexia Date: March 30, 1998 A GUIDE TO ETHICS: Eric Meslin took over leadership of the National Bioethics Advisory Commission last month. MORAL MIGHT Eric M. Meslin, 36, has taken over leadership of the National Bioethics Advisory Commission (NBAC) in Rockville, Md. Harold T. Shapiro, NBAC's chairman and president of Princeton Univers