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tag online developmental biology

Old ovaries, new eggs
Tia Ghose | Apr 11, 2009 | 2 min read
Are female mammals born with all the eggs they'll ever have, or can they produce new eggs into adulthood? The question has been vociferously debated, but now, a study published online in Nature Cell Biology today (April 12) reports that at least in mice, adult female ovaries have a store of stem cells that have the potential to generate new eggs. Human oocyte Image: Wikimedia CommonsThe study "is a huge step in quelling this debate," Jonathan Tilly, a reproductive biologist at Harvard Medical
Surpassing the Law of Averages
Jeffrey M. Perkel | Sep 1, 2009 | 7 min read
By Jeffrey M. Perkel Surpassing the Law of Averages How to expose the behaviors of genes, RNA, proteins, and metabolites in single cells. By necessity or convenience, almost everything we know about biochemistry and molecular biology derives from bulk behavior: From gene regulation to Michaelis-Menten kinetics, we understand biology in terms of what the “average” cell in a population does. But, as Jonathan Weissman of the University of Califo
A Selection of CRISPR Proof-of-Principle Studies
Kelly Rae Chi | Mar 1, 2017 | 7 min read
Advice on how to deploy the latest techniques in your own lab
Brains in Action
The Scientist | Feb 1, 2014 | 10+ min read
Neuroscientists are automating neural imaging and recording, allowing them to monitor increasingly large swaths of the brain in living, behaving animals.
 
Lab Tools: Close Encounters
Jeffrey M. Perkel | Oct 1, 2008 | 7 min read
Protein-protein interaction assays for all occasions.
Top 10 Innovations 2012
The Scientist | Dec 1, 2012 | 10+ min read
The Scientist’s 5th installment of its annual competition attracted submissions from across the life science spectrum. Here are the best and brightest products of the year.
Stem Cell Know-How
Aileen Constans | Sep 1, 2002 | 7 min read
Image: Courtesy of Gwenn-AEL Dnaet ©2002 National Academy of Sciences STEM CELL XENOGRAFT: Identification of human hepatocytes in livers from immune-deficient mice transplanted with human adult hematopoietic stem cells. Photomicrographs of NOD/SCID mouse liver sections from mice transplanted with purified human Lin-CD38-CD34-C1qRp+ cells isolated from umbilical cord blood, harvested 8-10 weeks post-transplant. Tissue sections were stained for HSA (hepatocyte-specific antigen) or c-met
Epigenetics: Genome, Meet Your Environment
Leslie Pray | Jul 4, 2004 | 10+ min read
©Mehau Kulyk/Photo Researchers, IncToward the end of World War II, a German-imposed food embargo in western Holland – a densely populated area already suffering from scarce food supplies, ruined agricultural lands, and the onset of an unusually harsh winter – led to the death by starvation of some 30,000 people. Detailed birth records collected during that so-called Dutch Hunger Winter have provided scientists with useful data for analyzing the long-term health effects of prenat
Assessing Differential Gene Expression
Barbara Cunningham | Nov 25, 2001 | 9 min read
As the complete human genome sequence emerges, research shifts from questions of genomics to those of proteomics--determining the function of individual gene products and mapping global gene expression patterns. Gene expression patterns change continually during the course of tissue development and differentiation. The expression of different gene products at any given time within a particular cell defines the cell's characteristics and helps determine how it will react to external stimuli. Alte
Pursuing Proteomes
Deborah Wilkinson | Jun 11, 2000 | 9 min read
Bio-Rad's PROTEAN® IEF System provides 2-D electrophoretic separation as part of the ProteomeWorks System Australian postdoctoral fellow Marc Wilkins coined the term "proteome" in the mid-'90s, referring to the total set of proteins expressed in a given cell at a given time. The term took hold, and a new scientific discipline was born. In proteomic studies, all the proteins from a given cell, organelle, or tissue are analyzed simultaneously with respect to properties such as expression leve

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