53 research outputs found

    Mendel's Peas & the Nature of the Gene: Genes Code for Proteins & Proteins Determine Phenotype

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    We are beginning to understand the biochemical nature of the genes that Gregor Mendel studied in his classic experiments with garden peas. This paper shows where Mendel's genes are located on the pea chromosome map, discusses the mutations involved in some of these genes, and shows how they can be used to teach classical genetics and the nature of the gene.</jats:p

    Visualizing Proteins &amp; Their Evolution

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    We present a tutorial for Cn3D, a molecular visualization program that allows students to see the tertiary structure of a protein and compare it with the primary structure of the same protein (Sayers et al., 2009). Students can also use the program to visualize two major evolutionary mechanisms: duplication and divergence, and exon shuffling.</jats:p

    1974 Jay-Cee-An BJC--Page 128

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    Photographs of BJC studentsNies, Owight Nixon, John Nystedt, Bradley O'Neill, Eugene Oberlander, Marlene 0' Callaghan, Renee Ocampo, Paul Orth meyer, Donald Odermann, Peter Offner, Nancy Ogden, Karla Ohlhauser, Randy Olmscheid, Duane Olson, Cheryl Olson, Jeffrey Olson, Rita Olson, Sherry Ondrasek, Elena O'Neill, Bonnie Opp, Rebecca Oster, Diana Oswald, Gregory otto, Ronald Paasch, Dennis Palmer, Howard Palmer, James Panko, Darrell Panko, Russell Parkes, Larry Parsons, Michael Patch, Michael Patchen, Richard Pat ience, Doug las Paul, Frank Paul, Lawrence Paulson, Denise Paulson, Sidney Payne, Orville Pearson, Curtis Pederson, Kenn Pedigo, Bobby Pepple, Annette Pepple, Jane Peter, Susan Peterson, Bruce Peterson, George Peterson, Kurt Peterson, Nea I Pfaff, Terry Pfahl, Beatrice Pfau, William Phillips, Kathleen Pickar, Roger Pitzer, Martin Pope, Lavonne Poppke, Bruce 2

    Discrimination in a Low-Wage Labor Market: A Field Experiment

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    Decades of racial progress have led some researchers and policymakers to doubt that discrimination remains an important cause of economic inequality. To study contemporary discrimination we conducted a field experiment in the low-wage labor market of New York City. The experiment recruited white, black, and Latino job applicants, called testers, who were matched on demographic characteristics and interpersonal skills. The testers were given equivalent resumes and sent to apply in tandem for hundreds of entry-level jobs. Our results show that black applicants were half as likely to receive a callback or job offer relative to equally qualified whites. In fact, black and Latino applicants with clean backgrounds fared no better than a white applicant just released from prison. Additional qualitative evidence from our testers' experiences further illustrates the multiple points at which employment trajectories can be deflected by various forms of racial bias. Together these results point to the subtle but systematic forms of discrimination that continue to shape employment opportunities for low-wage workers.race, field experiment, discrimination, labor markets

    The relation between accretion rates and the initial mass function in hydrodynamical simulations of star formation

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    TM acknowledges funding via the ANR 2010 JCJC 0501 1 ‘DESC’ (Dynamical Evolution of Stellar Clusters). IAB acknowledges funding from the European Research Council for the FP7 ERC advanced grant project ECOGAL.We analyse a hydrodynamical simulation of star formation. Sink particles in the simulations which represent stars show episodic growth, which is presumably accretion from a core that can be regularly replenished in response to the fluctuating conditions in the local environment. The accretion rates follow ṁ α m2/3, as expected from accretion in a gas-dominated potential, but with substantial variations overlaid on this. The growth times follow an exponential distribution which is tapered at long times due to the finite length of the simulation. The initial collapse masses have an approximately lognormal distribution with already an onset of a power law at large masses. The sink particle mass function can be reproduced with a non-linear stochastic process, with fluctuating accretion rates ∝m2/3, a distribution of seed masses and a distribution of growth times. All three factors contribute equally to the form of the final sink mass function. We find that the upper power-law tail of the initial mass function is unrelated to Bondi-Hoyle accretion.Peer reviewe

    Design and Performance of an Infrared Microscope Attachment

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    Author Institution: The Perkin-Elmer CorporationPresentations without an abstract printed in the proceedings do not have an abstract (image or text) in the Knowledge Bank record

    Biology : the dynamics of life

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    xxix, 1186 p. : il.; 27 cm
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