Research: Discovery at Princeton University Captions and credits (from top to bottom, left to right) Front Cover: (1) This image depicts neural stem cells that were genetically modified with an engineered form of HIV. Visualized in green is a transgenic protein introduced by HIV; red is a stem- cell stain, and blue depicts neuronal progeny. Courtesy of John Dimos GS, Department of Molecular Biology (2) Tamara Whitaker, a member of the Class of 2007, worked on an experimental setup with Professor Jay Benziger to overcome problems that arise in fuel cells when water droplets form in the systems. Benziger regularly forms research partnerships with students through PrincetonÕs Research Experience for Undergraduates, which he has directed since launching it in 1996, and through collaborations as part of their junior and senior independent work. Photo by Denise Applewhite (3) Shown is a representative visualization of a mathematical model of the magnetic-field lines and pressure distribution in the National Spherical Torus Experiment, created by Wonchull Park of the Princeton Plasma Physics Laboratory in conjunction with the SciDAC Center for Extended MHD Modeling. Courtesy of the Princeton Plasma Physics Laboratory (4) Peter B. Lewis, a member of the Princeton Class of 1955 and a trustee of the University, gave $60 million to support the construction and the programs of the Peter B. Lewis Õ55 Science Library, designed by renowned architect Frank Gehry and scheduled to open in 2008. Photo by Denise Applewhite (5) Doctoral candidate Karina Xavier (right) helps biologist Bonnie Bassler examine DNA X-ray film in her lab. Photo by Denise Applewhite (6) Carl Icahn Laboratory. Photo by Ramon Vi–oly Inside Front Cover: (7) In the constellation Cygnus (the Swan), dark clouds can be seen in front of Lynds Bright Nebula 258, from the Sloan Digital Sky Survey (SDSS). The red, green, and blue color planes represent the infrared, red, and green filters of the SDSS, so ionized hydrogen (actually red) appears green in this image. Courtesy of Douglas Finkbeiner, Department of Astrophysics (8) Lobby of the Carl Icahn Laboratory. Photo by Denise Applewhite (9) Research at Princeton Engineering increasingly combines multiple disciplines, from biology to materials science, to solve problems related to human health, energy production, the environment and security. Laboratory. Photo by Laura Pedrick (10) ÒFive-Horned Eggshell.Ó This image is a scanning electron micrograph of the anterior portion of a Drosophila virilis eggshell. The most obvious structures are the four respiratory appendages (green) that help the fly developing inside the eggshell to breathe. The fifth, shorter ÒhornÓ is the micropyle, which is a small tube used for sperm entry. Also of interest, the complex web-like pattern of white proteinaceous material indicates the outline of the individual cells that secreted the eggshell. Courtesy of Nir Yakoby and Maria Pia Rossi, Department of Chemical Engineering (11) Electron microscopy courtesy of the Department of Molecular Biology, 2003. Page 1: (12) Christopher Moore, a graduate student in psychology, sits at the console of the MRI scanner. Behind the glass, postdoctoral researcher Per Sederberg helps prepare the machine to scan a test subject. The two are using the MRI to explore the nature of memory as members of Assistant Professor of Psychology Kenneth NormanÕs lab group. Photo by Denise Applewhite (13) ÒFalling ApartÓ is one of the first pictures taken by using the high throughput immunofluorescence screen. It shows a human fibroblast cell stained green by an antibody that is directed against an unknown cellular protein, which possibly plays a role in human cytomegalovirus infection in human fibroblasts. The cellular DNA (nucleus) is stained in blue. Courtesy of Joerg Schroeer, Department of Molecular Biology (14) Project Matterhorn was the code name for the controlled thermonuclear research effort started by Princeton University in 1951 under the leadership of Lyman Spitzer. In 1951, Spitzer outlined the basic concept for creating the stellarator, a device for confining and heating ionized hydrogen gas to release fusion energy for the production of power. He was able to receive support from the U.S. Atomic Energy Commission as well as Princeton University, which lay the foundation for starting Project Matterhorn. Image from the Project Matterhorn Publications 1951Ð58; care of Princeton University LibraryÕs Digital Collections (15 and 16) Courtesy of the Department of Molecular Biology (17) Dean for Research A. J. Stewart Smith stands in front of the BaBar experiment at the Stanford Linear Accelerator Center. Photo by Diana Rogers Inside Back Cover: (18) Courtesy of the Neuroscience of Cognitive Control Laboratory. (19) These microscope images are of two green zebrafish make the shape of a green heart. The green color in the top image results from the fluorescence of green fluorescent protein under the excitation of blue light. It is expressed in the fish driven by the Nodal-response element. The bottom image shows the zebrafish under white light. Courtesy of Bo Xu GS, Department of Molecular Biology (20) Courtesy of the Neuroscience Institute. (21) During the development of multicellular organisms, specific cells commit suicide in a process known as programmed cell death, which is required for the normal growth of all animals, including humans. Furthermore, it is essential for preventing the development of cancer, because it destroys cells that would otherwise multiply unchecked. In the nematode worm Caenorhabditis elegans (pictured in the background), programmed cell death is controlled by a protein machine containing two molecules of CED-4 (foreground, colored green and cyan) and one molecule of CED-9 (red). Visualizing this protein machinery provides important information on the regulation of programmed cell death in animal cells and offers the potential to design drugs that might block or promote it. Courtesy of Yigong Shi, Department of Molecular Biology (22) Wole Soboyejo, Professor of Mechanical and Aerospace Engineering, meets with students as director of the Undergraduate Research Program at the Princeton Institute for the Science and Technology of Materials. He is also the director of the U.S./Africa Materials Institute. His research focuses on experimental studies of biomaterials and the mechanical behavior of materials. Photo by Denise Applewhite Back Cover: (23) ÒVirus-Cell Interaction.Ó This image shows human cytomegalovirus infected human endothelial cells (multicolor immunofluorescence (IF), blue: DAPI = cellular DNA, green = GFP (green fluorescence protein), red + magenta = two different viral proteins). Captured with a Zeiss LSM510 laser scanning confocal microscope. Courtesy of Joerg Schroeer, Department of Molecular Biology (24) M51, the ÒWhirlpoolÓ galaxy in the constellation Canes Venatici, is about 30 million light years away from the Milky Way. The image shows two colliding galaxies, which have torn stars from their outer parts and spread them over much of the field of this image. The image is from the Sloan Digital Sky Survey. The red, green, and blue color planes represent infrared, red, and green filters. Courtesy of Robert Lupton, Department of Astrophysics (25) As part of an outreach program that enables local New Jersey students to meet African scientists doing materials research, Ishani Sud, a member of the Class of 2008 (left) and Dan Steinberg of the NSF-funded Princeton University Materials Academy,discuss the physics behind solar ovens with a student from Trenton. Photo by Frank Wojciechowski (26) Viral membrane proteins in PRV-infected sensory neurons. Us9 (green) and gE (red). Courtesy of Lynn Enquist, Department of Molecular Biology (27) National Spherical Torus Experiment (NSTX) in January 2001. Photo by El Starkman, Princeton Plasma Physics Laboratory