Life Sciences Commons^™

12-Month-Olds’ Discrimination Of Monkey Faces: Evidence For Perceptual Narrowing?, Jacob C. Jones, Scott Stevens, Melissa Wright, Amanda Phillippi

FHSS Mentored Research Conference

It is well known from birth that faces are salient, preferred over other stimuli, and are readily discriminated. It has also been shown that over the course of development infants’ proclivity for face discrimination is influenced by their social environment. Pascalis, deHann, andNelson (2002), for example, demonstrate that 6-month-olds are able to discriminate various monkey faces as well as human faces whereas 9-month-olds can only discriminate different human faces. Importantly, however, if 6-month-olds receive 1-2 minutes per day of familiarization with photographs of monkey faces three months later the now 9-month-olds can still discriminate unfamiliar and familiar monkey faces. Like …

Decreasing Temperature Below Tt Or Increasing Cholesterol Enhance Vesibcle-Bilayer Membrane Fusion, David E. Lee, Reed A. Doxey, Kevin J. Tuttle, Dixon J. Woodbury

FHSS Mentored Research Conference

Lipid composition plays an important role in fusion of vesicles to membranes, an essential process for exocytosis. Lipid head group, tail structure, and sterol content all impact the complex phase behavior of membranes. To determine the effect of lipids on fusion, we utilized the nystatin/ergesterol (nys/erg) fusion assay and stimulated fusion with a salt (osmotic) gradient. With this assay, vesicles containing nys and erg fuse with a planar membrane producing characteristic spike increases in membrane conductance.Using PE/PC (7:3) membranes, we varied cholesterol from 0-40 mol% and observed significant increases in fusion rates. In one series of experiments, membranes were formed …

Journals Of Travels, Stanley L. Welsh

Books by Faculty of the Monte L. Bean Life Science Museum

Abstract

It is unfortunate that journals were not kept routinely for all of my [Stanley L. Welsh] expeditions that resulted in collections of plants that formed the bases for publications over the years. Only the record books and the specimens document most of the trips, and they are without detail of the events leading up to them or of those that transpired on them. The journals reproduced here show good intentions, which unfortunately were not fulfilled subsequently. The early field trips from Iowa State, accompanied by Dennis Anderson set the tone for later trips to Alaska, in 1965, 1966, 1968, …