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tag lost colony microbiology developmental biology immunology culture

A scanning electron micrograph of a coculture of E. coli and Acinetobacter baylyi. Nanotubes can be seen extending from the E. coli.
What’s the Deal with Bacterial Nanotubes?
Sruthi S. Balakrishnan | Jun 1, 2021 | 10+ min read
Several labs have reported the formation of bacterial nanotubes under different, often contrasting conditions. What are these structures and why are they so hard to reproduce?
The Scientist Staff | Mar 28, 2024
Stem Cell Discoveries Stir Debate
Douglas Steinberg | Nov 12, 2000 | 9 min read
Editor's Note: This is the first of two articles on questions raised by recent stem cell discoveries. The second article, focusing on various organs and the nervous system, will appear in the Nov. 27 issue of The Scientist. Researchers first isolated embryonic stem cells (ESCs) from mouse blastocysts almost 20 years ago, and a paper announcing the discovery of human ESCs emerged in 1998. Adult-derived stem cells (ASCs) have since become the rage in certain quarters of biology, with unexpected--
Tissue Engineering Now Coming Into Its Own As A Scientific Field
Ricki Lewis | Jul 23, 1995 | 7 min read
Field Author: Ricki Lewis Sidebars: A Tissue Survey Over the past decade, tissue engineering has evolved from a hodgepodge of different disciplines to a biotechnology field in its own right. A marriage of chemical engineering and cell biology, with input from genetics and surgery, tissue engineering combines living cells, biochemicals, and synthetic materials into implants that can function in the human body. Some 30 companies and dozens of academic laboratories are pursuing tissue engineeri
Surviving the Ice Age
Sarah C.P. Williams | Sep 1, 2014 | 6 min read
A beginner’s guide to freezing and thawing pluripotent stem cells
Resisting Cancer
George Klein | Apr 1, 2015 | 9 min read
If one out of three people develops cancer, that means two others don’t. Understanding why could lead to insights relevant to prevention and treatment.
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
Cloning Capsized?
Ted Agres | Aug 19, 2001 | 10+ min read
Biopharmaceutical researchers fear how pending federal legislation outlawing the cloning of human cells will restrict their abilities to find cures for major degenerative diseases.1,2 Some also see lawmakers impinging on established nonhuman cloning techniques essential for the discovery of new drugs and therapies. The source of all this worry? The US House of Representatives passed July 31 by a wide margin a bill (H.R. 2505) sponsored by Reps. David Weldon (R-Fla.) and Bart Stupak (D-Mich.) th
Observers Praise AIDS Report But Foresee Problems In Implementation
Steven Benowitz | May 12, 1996 | 10 min read
Problems In Implementation LOUD AND CLEAR: Attorney Lynda Dee stresses the need for communication among the institutes. When a federally appointed panel announced in March the results of its 15-month-long review of the United States government's AIDS research program, AIDS activists as well as scientists cheered. The National Institutes of Health's AIDS Research Program Evaluation Working Group's recommendations largely called for scrapping what the group saw as outdated and ineffective polic

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