London, April 21 IANS | 6 months ago

In a first, scientists have discovered a new property in the nuclei of embryonic stem cells that could pave way for wider application of the body's master cells, including bulletproof vests.


Known as auxeticity, the property may have application as wide-ranging as soundproofing, super-absorbent sponges and bulletproof vests, said the study.

Until now, auxeticity has only been demonstrated in man-made materials and very rarely in nature, such as some species of sponge.

What is auxeticity?

Most materials when stretched will contract. For example, if one pulls on an elastic band, the elastic itself will get thinner.

The opposite is also true: squeeze a material and it will expand. For example, if one squeezes a tennis ball between both hands, the circumference around the ball gets larger.

However, auxeticity has the opposite effect - squeeze it and it will contract, stretch it and it will expand.

This means that auxetic materials act as excellent shock absorbers or sponges, a fact that is being explored for various uses.

"When the stem cell is in the process of transforming into a particular type of cell, its nucleus takes on an auxetic property, allowing it to 'sponge up' essential materials from its surrounding," said Kevin Chalut from Stem Cell Institute, University of Cambridge.

The researchers treated the transitioning cell's cytoplasm, the fluid surrounding the nucleus, with a coloured dye and found that when they stretched the nucleus, it absorbed the dye, suggesting that it had expanded to become porous.

Auxetic materials are of great interest to material scientists and engineers and this new discovery may provide clues to different methods of manufacture.

The study appeared in the journal Nature Materials.

(Posted on 21-04-2014)

Share This Page:


Post your comments


Information on States of India:

Andaman Nicobar | Andhra Pradesh | Arunachal Pradesh | Assam | Bihar | Chandigarh | Chhattisgarh | Dadar Nagar Haveli | Daman Diu | Delhi | Goa | Gujarat | Haryana | Himachal Pradesh | Jammu Kashmir | Jharkhand | Karnataka | Kerala | Lakshadweep | Madhya Pradesh | Maharashtra | Manipur | Meghalaya | Mizoram | Nagaland | Orissa | Pondicherry | Punjab | Rajasthan | Sikkim | Tamil Nadu | Tripura | Uttar Pradesh | Uttaranchal | West Bengal

INDIA REGIONAL MAPS:

Andhra Pradesh Travel Map | Bihar Travel Map | Goa Travel Map | Gujarat Travel Map | Haryana Travel Map | Himachal Pradesh Map | Karnataka Travel Map | Kerala Travel Map | Maharashtra Travel Map | Punjab Travel Map | Rajasthan Travel Map | Sikkim Travel Map | Tamil Nadu Travel Map | Uttar Pradesh Travel Map | West Bengal Travel Map |

KERALA TRAVEL MAPS:

Alappuzha | Ernakulam | Idukki | Kannur | Kasaragod | Kollam | Kottayam | Kozhikode | Malappuram | Palakkad | Pathanamthitta | Thiruvananthapuram | Thrissur | Wayanad |

TRAVEL MAPS OF INDIA:

Airports of India | Districts of India | India Pilgrim Centers | Tourism Map of India | National Highways in India | India Railway Routes |

INDIA CITY MAPS:

Ahmadabad | Bangalore | Chennai | Coimbatore | Delhi | Hyderabad/Secunderabad | Kochi | Kolkata | Mumbai | Pondicherry | Pune | Surat |