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NEWSNOTES
SCIENCE NEWS
Mounting
On Viagra: If you're planning to go mountaineering, here's a tip:
take some Viagra along. Scientists from the UK and Kyrgyzstan have shown
that Viagra, which boosts sex lives, can also help people breathe more
easily at high altitudes. The scientists found that the same enzyme that
constricts blood flow to the penis, thus preventing erection, also produced
breathlessness at high altitudes by constricting the arteries in the lungs.
As Viagra blocks the action of the enzyme, it could help people in such
situations-if its other effect doesn't make climbing difficult. Clinical
trials still need to be carried out. So don't junk the oxygen cylinders
yet.
Anthrax
Overkill: Among the many monsters of its creation that have returned
to haunt the US, anthrax is one. The bacterium was developed into a biological
weapon by American scientists. Now as Florida lives a scare after two
people died of the disease, scientists-again from the US-have found a
gene resistant to anthrax in mice. Variants of this gene protect cells
in the immune system called macrophages, which are the first to be attacked
by anthrax. But a treatment for humans is still a long way; Osama bin
Laden has time on his side.
Weight
and Watch: Women's buttocks and thighs apparently have functions beyond
those that spring first to the mind: they help women retain (physical)
balance during pregnancy and lactation, says a Polish researcher. A report
in Current Anthropology says women have an additional load in front when
pregnant or nursing; this brings the centre of gravity forward, skewing
the balance. The added weight behind compensates for this. This evolutionary
pressure to remain on their feet while pregnant spurred the growth of
the fatty deposits. And chocolate alone is not to blame.
HEALTH
DIARRHOEA
Sipping Back to Life
That
diarrhoea is a leading child killer in India is tragic. What is worse
is that the deaths can easily be prevented. A fifth of infants below five
who die in India are victims of diarrhoea. That should not be the case,
is the verdict of an international conference on diarrhoeal diseases and
nutrition held in Delhi recently. Diarrhoea kills because it dehydrates
and the body loses vital salts. The body becomes weak, and in severe cases,
the kidneys may fail. There's an old, simple, cheap, life-saving solution-oral
rehydration therapy (ORT) or oral rehydration solution (ORS)-but it is
not being used widely enough. Statistics show that if 30 per cent of those
struck with diarrhoea in the country use ORS, 40,000 deaths can be prevented
every year.
The World Health Organisation has also endorsed
a new, more effective version of ORS, called Low Osmolarity ORS, which
will be available in India soon. But the problem, says M.K. Bhan of AIIMS,
is the gap between awareness and action. "Seventy per cent of mothers
know about ORS, but only a third use it in a crisis," he says. That's
ironic since it can be bought without a prescription for just Rs 12 a
packet.
"ORS packets should be part of a home medical
emergency kit," advises Bhan. It's important that the salts are reconstituted
in the correct concentration-one packet dissolved in five glasses of boiled
water. ORS can also benefit the elderly who are often dehydrated because
they are slow to recognise thirst. The solution is simple. Making people
realise that is proving a great deal more difficult.
-Supriya Bezbaruah
NOBEL PRIZES
Divide
Rule: Britons Paul Nurse and Timothy Hunt and American Lee Hartwell
won the Medicine prize for discovering separately the key genes and proteins
involved in cell division.Their discovery has huge implications in finding
a cure for cancer and Alzheimer's disease.
Mirror Pace: Molecules that are mirror
images of each other are called "chiral". Medicines often have
these molecules, and the wrong form can be harmful. That is why it is
vital to be able to produce each chiral form separately. William S. Knowles,
Ryoji Noyori and K. Barry Sharples won this year's Chemistry prize for
developing chiral catalysts for hydrogenation and oxidation reactions.
Atom
Song: Making "atoms sing in unison" has won three scientists-Eric
Cornell and Carl Wieman of the US, and Germany's Wolfgang Ketterle-this
year's Nobel Prize for Physics. Their work involved freezing matter into
a new pure, coherent state called Bose-Einstein condensate. This promises
faster computer circuits and more accurate guidance systems for aircraft.
-Compiled by Supriya Bezbaruah with Pavan
Keswani
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