ABOVE: A positive rapid test will yield two visible lines (middle) while a valid negative test will only show a single line in the control region (right) and an invalid test will show no control line (left). iStock, ASIFE V iral TikTok videos showing teenagers hacking rapid COVID-19 tests by inserting sodas and other acidic solutions into the tests’ inlet caused quite a stir in 2021 ...

May 28, 2024 · UNIVERSE 25: John Calhoun crouches within his rodent utopia-turned-dystopia that, at its peak, housed approximately 2,200 mice. Calhoun was studying the breakdown of social bonds that occurs under extreme overcrowding, following up on his earlier discovery of the learned "behavioral sink" phenomenon in rats. 1

W ith the COVID-19 pandemic dragging toward a most unwelcome third year, it’s not surprising that the biomedical community has continued to focus on diagnosing and treating the disease. The list of this year’s Top 10 Innovations winners reflects these shared goals with a couple of products that can help researchers better understand …

From 2017 to 2022, Bob Grant was Editor in Chief of The Scientist, where he started in 2007 as a Staff Writer.

Sep 30, 2022 · Pluripotency. Pluripotent stem cell lines are derived from an embryo or scientists artificially generate induced pluripotent stem cells (iPSCs) by reprogramming somatic cells with forced expression of embryonic transcription factors. 1 Pluripotent stem cells and iPSCs function similarly, and the discovery of iPSCs helped researchers understand how …

On July 12, 1887 Albert A. Michelson and Edward W Morley made the final measurements in an experiment that inadvertently changed forever the way we view the workings of the universe. The pair hoped to prove the existence of the ether—the invisible fluid thought to permeate the universe and to serve as the medium through which light waves travel.

Nov 8, 2023 · Like PCR, qPCR amplifies DNA using a DNA polymerase enzyme.This adds new nucleotides to the 3’-OH end of a short, single-stranded DNA segment, called a primer, which complements the template strand. 2 The reaction occurs in specialized thermal cyclers equipped with fluorometers that measure fluorescent signals, quantifying both relative and absolute DNA amounts when combined with reference ...

Sex Differences in Neurological Research. Experts from the Women’s Brain Foundation and bit.bio will explore the importance of sex-specific in vitro models for neurological research and drug discovery.

M ost scientists agree that five events in Earth’s history qualify as “mass extinctions”—defined as events where more than three-quarters of estimated species are wiped out. These ordeals were caused by natural phenomena, typically involving climatic changes, although the exact processes involved and the chain of events are often debated.

Jan 31, 2025 · Uzma Rentia is a third-year medical student at George Washington University. She has a background in bioinformatics techniques and has published work on ovarian cancer epigenetics, researched CAR T-cell therapies for diffuse intrinsic pontine glioma, and validated pipelines for viral genome analysis.