Figure 1 shows hydrogel-aptamer capture and release. The hydrogel can be made sensitive to environmental variables. In the current study, changes in solution pH cause the hydrogel to either swell... Like vast international trading companies, biological systems pick up freight items (in the form of small molecules), transport them from place to place and release them at their proper destination. These ubiquitous processes are critical for activities ranging from photosynthesis to neuronal signaling.

Scientists have for the first time used DNA sequencing to trace the fatal spread of multidrug-resistant tuberculosis between patients in the UK.

This is an abstract representation of virus inducing enzyme to produce lipid envelope. More than 60 percent of the world's population is infected with a type of herpes virus called human cytomegalovirus. The virus replicates by commandeering the host cell's metabolism but the details of this maneuver are unclear.