Tag: "harden" at biology news

Secret behind hard exoskeletons, spreading wings revealed

...flies whose outer shells showed defects or did not harden completely. She found that all of the mutants had ...revent them from releasing their own bursicon will harden and darken if they are injected with central nervous system samples from other flies or insects whic...

Discovery may help in war against fire ants

...n said. The female develops no further, except to harden an anterior portion (the cephalothorax), which squeezes out between abdominal segments and emits a male attractant. The male develops within the ant, and the day it is to emerge, it elicits a strange behavior in its host: The ant will leave the colo...

Botanist explores fascinating world of plant resins and amber in comprehensive new book

... resin. Plant resins--sticky plant secretions that harden when exposed to air--have been used as medicines, fuels, varnishes, adhesives, and perfume ingredients, to mention just a few examples. Jean Langenheim, professor emerita and research professor of ecology and evolutionary biology at the University o...

Chemical messenger controls bone growth in embryos, study finds

...e: The bones of mice lacking FGF 18 didnt begin to harden as soon as they should have. Ossification was delayed by about two days, which is a long time for mouse embryos, says Ornitz. That suggests that FGF 18 also influences a second receptor, probably FGF receptor 1 or 2. Ornitz and his colleagues now a...

The building blocks of erection: Nitric oxide...and more nitric oxide

...ection, blood vessels release more nitric oxide to harden and maintain the erection. "Once blood starts flowing into the penis, the source of nitric oxide in the blood vessels is continuously activated so that more nitric oxide is released, more tissue relaxes, more blood comes in and a sustained erection i...

UT Southwestern researchers show tumor-suppressor genes linked to insulin signaling

...espread development of benign tumors (tubers) that harden as the patient grows older, skin rashes, seizures and developmental delays. Although it is clear the TSC genes are responsible for this illness, it remains unknown how they normally function to suppress tumor formation. Pan and Gao examined how the T...

Virginia Tech Research Group Presents Improved Dental Materials

...ngs on metal cans, for example. It is also used to harden dentalfilling material. Gunduz used PhotoDSC technology (a combination of lightactivation and differential scanning calorimetry) to measure the attributes ofnew materials developed by the Virginia Tech group. At the American Chemical Society Biennial...

Duke Researchers Genetically Engineer Mice To Block Heart Enlargement

...mass helps at first, over time the heart walls can harden and hamperrather than bolster the pumping action. This leads to congestive heart failure. Congestive heart failure is notoriously difficult to treat, althoughearly symptoms are often mild, and can be treated with changes in diet andex...

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