The psychology of
snake and spider phobias unlocked
NEW
YORK, Mar 24: A large number of people count
snakes and spiders among their fears. Now, a new
study claims to have unlocked the psychology of
the common phobias.
Researchers have
found that contrary to assumptions that humans
possess an evolutionary predisposition to fear
the creepy creatures, it is the exposure to
negative information about snakes and spiders,
which causes phobias.
"Previous
research shows we react differently to snakes and
spiders than to other stimuli, such as flowers or
mushrooms, or even other dangerous animals... Or
cars and guns, which are also much more
dangerous.
"(In the
past, this) has been explained by saying that
people are predisposed by evolution to fear
certain things, such as snakes and spiders, that
would have been dangerous to our ancestors.
"(However),
people tend to be exposed to a lot of negative
information regarding snakes and spiders, and we
argue this makes them more likely to be
associated with phobia," said Dr Helena
Purkis of University of Queensland.
In their study,
the researchers compared the responses to stimuli
of participants with no particular experience
with snakes and spiders, to that of snake and
spider experts.
"Previous
research has argued that snakes and spiders
attract preferential attention and that during
this early processing a negative response is
generated... As an implicit and indexed
subconscious (action).
"We showed
that although everyone preferentially attends to
snakes or spiders in the environment as they are
potentially dangerous, only inexperienced
participants display a negative response,"
Dr Purkis said.
According to the
researchers, the findings could significantly
increase understanding about the basic cognitive
and emotional processes involved in the
acquisition and maintenance of fear.
"If we
understand the relationship between preferential
attention and emotion it will help us understand
how a stimulus goes from being perceived as
potentially dangerous, to eliciting an emotional
response and to being associated with phobia.
"(This) could
give us some information about the way people
need to deal with snakes and spiders in order to
minimise negative emotional responses," the
'ScienceDaily' quoted Dr Purkis as saying.
The researchers
are now planning a follow-up study, which will
test their theory that love and fear, or phobia,
involve the same basic attention mechanism.
"We're
interested in testing animal stimuli for animal
lovers to see whether these stimuli, a dog for a
breeder for instance, have access to preferential
attention (in the same way as snakes and spiders
do for those with phobias of them)," Dr
Purkis said. (PTI)
UAE to set up
nuclear power plants...
DUBAI,
Mar 24: The oil rich United Arab Emirates
(UAE) has decided to set up an agency to assess
and develop a peaceful and ''fully transparent''
nuclear energy programme with an initial capital
of 100 million dollar.
Even as India is
dillydallying on its nuke deal with the US, the
energy surplus UAE is to import enriched uranium
for the plant from a ''trusted foreign source,''
which could likely be Washington.
UAE had signed an
agreement with France to develop a peaceful
nuclear programme but that does not include the
process to enrich uranium. The decision to go
nuclear for energy was approved by the UAE
cabinet on yesterday at a meeting in Abu Dhabi
chaired by UAE Prime Minister Shaikh Mohammed bin
Rashid al Maktoum, the official WAM news agency
reported.
At the meeting,
Foreign Minister Shaikh Abdullah Bin Zayed Al
Nahyan, outlined the UAE project and presented a
memo on the possibility of developing a peaceful
nuclear energy programme and said the project
will be totally transparent to international
community.
Studies conducted
by official agencies on local supply and demand
for electricity found that power generation
through the use of nuclear energy represents a
competitive option commercially and
environmentally, he added.
The planned
Nuclear Energy Authority, WAM reported, will have
the ''mandate to evaluate and develop a peaceful
nuclear energy programme in line with the
recommendations of the International Atomic
Energy Agency (IAEA).''
The GCC countries
at large are looking seriously at nuclear energy
in order to conserve oil. The switch to nuclear
energy could open up huge export potential for
India for non-sensitive components and expertise
used in the projects.
Stressing the
transparency of the programme, the cabinet
endorsed an official statement outlining the
country's intention to develop nuclear energy for
peaceful purposes.
''By adopting
clear and transparent policies regarding its
intention to develop a peaceful nuclear energy
programme and its complete commitment to the UN
nuclear non-proliferation treaty and other
related conventions, the UAE wants to set a new
model to enable countries that do not possess
nuclear programmes to utilise and benefit from
the nuclear energy with full support from the
international community,'' the statement said.
(UNI)
Cloned cells
treat Parkinson's in mice
WASHINGTON,
Mar 24: Researchers who used cloned
embryonic stem cells to treat Parkinson's disease
in mice have said they worked better than other
cells.
The researchers
were trying to prove that it is possible to make
embryonic stem cells using cloning technology and
use them to provide a tailor-made treatment.
But they found
that a mouse's own cloned stem cells were far
less disruptive to its body than cloned cells
taken from other mice.
''It demonstrated
what we suspected all along -- that genetically
matched tissue works better,'' said Viviane Tabar
of Memorial Sloan-Kettering Institute in New
York, who worked on the study.
''When you give
the other type of tissue, non-autologous tissue,
you get more inflammation than we anticipated.
This is in a lab animal where we expect it to be
tolerant. Normally when you do this in mice, you
don't give matched cells,'' Tabar added in a
telephone interview.
The mice given
non-matched brain cells did more poorly than the
mice given cells from their own clones, the
researchers reported in the journal Nature
Medicine.
Stem cells are the
master cells of the body and embryonic stem cells
are the ultimate master cells, giving rise to all
the other cells and tissue. Cloning researchers
hope one day to be able to take a little piece of
skin and grow embryonic stem cells from it for
personal, tailor-made medical treatments.
One disease always
named that may benefit from this technology is
Parkinson's. The incurable, fatal illness is
caused by the destruction of specific brain
cells.
THERAPEUTIC
CLONING
It is sometimes
treated with transplants of brain cells from
cadavers or aborted fetuses. Stem cell
researchers have argued that cloning technology
might provide a better source of cells for
treatment.
Tabar and his team
first created a Parkinson's-like disease in mice
using chemicals to destroy their brain cells.
They took ordinary
cells from the tails of the mice, transferred the
nuclei from them into hollowed-out mouse eggs
cells, and made clones of the mice. This process
is called somatic cell nuclear transfer, or
''therapeutic cloning''.
The cloned embryos
were harvested for their stem cells after a few
days. The researchers grew these in the lab and
coaxed them into becoming the so-called
dopaminergic brains cells that are lost in
Parkinson's.
They put these
into the brains of the injured mice. These mice
got better, Tabar said.
No one has done
this before. ''It's incredibly hard and it
involves a series of inefficient steps,'' Tabar
said yesterday.
Several
researchers have made cells that look and act
like embryonic stem cells by reprogramming their
genes. Tabar said her team would try using these
so-called induced pluripotent stem cells in the
same way.
Some people oppose
using cloning technology to make human embryonic
stem cells, or to creating human embryos for this
purpose. It is also difficult to obtain human egg
cells.
Scientists hope
the induced pluripotent stem cells might provide
a short cut that no one would object to.
''This is an
exciting step down the pathway of creating a
self-specific stem cell and getting away from the
ethical demands of traditional embryonic stem
cells,'' said Richard Boyd, Deputy Director of
the Monash Immunology and Stem Cell Laboratories
in Victoria, Australia.
(AGENCIES)
'Ecuadorean
killed in cross-border raid on rebels'
BOGOTA,
Mar 24: Colombia's defence minister
announced today that an Ecuadorean was killed
during Colombia's controversial March one raid on
a rebel camp in Ecuador's jungle.
Ecuador briefly
mobilized troops to its border with Colombia in
the wake of the attack that killed top Colombian
rebel commander Raul Reyes and 25 others.
Confirmation of the Ecuadorean death threatened
to revive tensions among the Andean neighbours
that still have not renewed diplomatic relations.
Defence Minister
Juan Manuel Santos said one of two bodies brought
to Colombia after the attack belonged to the
Ecuadorean he identified only by the nom de
guerre "Lucho."
The Ecuadorean's
body was initially identified as that of a
Colombian rebel troubadour, alias Julian Conrado,
and brought back to the Colombian capital of
Bogota with Reyes' body.
Relatives of a
missing Ecuadorean locksmith say they have seen
news photos that indicate the body is that of
their son. The family of Franklin Aizalia plans
to travel to Bogota as soon as Monday in a bid to
confirm the body's identity.
On Saturday,
Ecuadorean President Rafael Correa threatened to
launch a new diplomatic offensive against
Colombia if DNA tests confirm that Colombian
forces killed an Ecuadorean citizen.
Santos today urged
Ecuadorean authorities not to act rashly.
"To President
Correa and Ecuadorean authorities: Be careful
with letting yourselves act impetuously on behalf
of criminals," the defence minister told
reporters while attending an unrelated military
funeral. (AGENCIES)
Hate crime: US
man pleads guilty to attacking Sikh cabbie
SILICON
VALLEY, Mar 24: A 21-year-old American man who
attacked a Sikh taxi driver and called him a
"terrorist" is facing two years in
prison after he pleaded guilty to hate crime
charges.
Luis Arturo
Vazquez, 21, pleaded guilty this week to
second-degree assault and malicious harassment
for the November attack, which left Sukhvir
Singh, 48, with a concussion, cuts, bite marks on
his scalp and other injuries.
Prosecutors in the
Washington state will ask for a two-year jail
term when Vazquez is sentenced on April 18,
Seattle Post Intelligencer reported.
Vazquez was drunk
and had been kicked out of a football game when
officers spotted Singh's cab and asked him to
give him a ride home on Nov 24 last year,
according to court documents.
Vazquez hurled
racial slurs at Singh and attacked the driver who
was force to pull over the car. Police allege
Vazquez punched and bit Singh, pulling out hair
locks as he threatened him and called him a
terrorist.
Vazquez had been
released on a USD 25,000 bail after the attack.
After the 9/11
terror strikes, turbaned Sikhs have been targeted
in hate crime attacks in the US as people mistake
them for Arabs. (PTI)
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