E-Nose to take the
Nose beyond what it knows
NEW
YORK, Jan 12: Ancient medical practitioners relied
on their nose to diagnose illness.
Technology is now
turning this ancient art into modern science.
Technicians and
engineers are working to develop an electronic
nose which will allow doctors to use their sense
of smell to detect much beyond what the nose
knows about the human body.
The odour
signatures of a disease arise due to several
reasons. Bacteria, like all living organisms,
release unique mixtures of gases; bacterial
infections may be diagnosed by the characteristic
scents of these gases.
However,
non-bacterial disorders, such as diabetes, may
prompt biochemical changes that alter the smell
of a patient's body. But many of these odours may
be tough for the humans to detect and identify.
Ancient doctors
knew that diabetes could make a patient's breath
smell sweet and that a wound emitting a foul odor
was infected.
The new gadget
would be a revolutionary step in the medical
engineers' efforts to develop increasingly
non-invasive techinques to diagnose and detect
ailments.
There are a
variety of electronic e-nose models, all of which
consist of an array of olfactory sensors that are
activated in unique patterns when exposed to
different aromas. A special Software identifies
each odour and its source by analysing the
patterns.
Though the
technology was originally designed for other
tasks, such as sniffing out chemical leaks or
detecting food spoilage, research is increasingly
revealing its diagnostic potential. Physicians
can effectively identify potential lung cancer
patients by smelling their breath.
''Both diseases
and bacteria that cause diseases have individual
and unique odours. You can walk into a patient's
room and know immediately in some cases that the
patient has such and such bacteria just because
of the odour,'' Scientific American quoted Bill
Hanson, an anesthesiologist and critical care
specialist at the University of Pennsylvania.
Mr Hanson showed
that the technology is useful for diagnosing
chronic sinusitis and pneumonia, and other
researchers proved that the noses can distinguish
asthmatic patients from healthy ones. Some of
them can also sniff out infections in urine,
blood and other bodily fluids.
Combined with the
fact that these artificial noses are faster,
cheaper and less invasive than many other
diagnostic tests, and it is easy to understand
why physicians find the technology appealing.
Researchers
believe it could make a dramatic difference in
the success of treatments, paving the way for
early detection of lung cancer and other
diseases.
(UNI)
'It is not just
letting go, hypnotism does alter the
brain'........
LONDON,
Jan 12: Hypnotism produces measurable
changes in the brain that suggest the effects are
real and not simply people ''letting themselves
go,'' a research shows.
The study
conducted by a team of researchers in Israel
found that parts of the brain were affected by
hypnosis.
However, sceptics
have argued that hypnosis does not result in an
altered state of consciousness , but is an
exaggerated form of social compliance, where
subjects suspend their critical faculties to do
whatever a hypnotist asks of them.
In the new study,
brain scans of people that were taken following a
hypnotic suggestion to forget have revealed parts
of the brain really are affected, the Daily
Telegraph reported.
The insights into
memory suppression and recall may help understand
the mechanisms underlying some forms of amnesia,
along with how we suppress distressing memories
or things we would rather not dwell upon,
researchers claim.
In fact , the
study was conducted on two groups of volunteers -
those who were susceptible to hypnotic
suggestions and those who were not - after they
had shown a documentary depicting a day in the
life of a young woman.
A week later, they
placed them in a brain scanner and induced them
into a hypnotic state. In this state, the
scientists gave the subjects a posthypnotic
suggestion to forget the movie, also giving them
a reversibility cue that would restore the
memory.
Once the subjects
had been brought out of the hypnotic state, the
researchers tested their recall, then gave them
the reversibility cue and tested their recall
again.
As expected, the
hypnosis-susceptible group showed reduced recall
of the movie, compared with the
hypnosis-non-susceptible group.
Analysis of the
brain scans revealed distinctive differences
between the hypnosis-susceptible group and
-non-susceptible group in specific brain areas.
(UNI)
UN seeks USD 104
million from donors to help Nepal........
NEW
YORK, Jan 12: The United Nations has appealed to
international donors for more than USD 104
million to support humanitarian and development
efforts in Nepal, which is seeking to recover
from a decade-long civil conflict after a 2006
peace accord between the Government and Maoists.
The Common Appeal
for Transition Support (CATS) for 2008 has sought
funds for 61 projects to address urgent needs in
the areas of food and nutrition, protection,
health, disaster preparedness and response.
It will also allow
aid workers to assist internally displaced
persons (IDPs), refugees and children affected by
armed conflict.
Though the
conflict officially ended in November 2006 when
the Government and the Communist Party of
Nepal-Maoist (CPN-M) signed a comprehensive peace
agreement, the country faces a number of
challenges as it seeks to recover and rebuild.
"Bombings,
killings, abductions, demands for ransom and
other forms of threats aimed at political
opponents and civilian populations continue to
hinder the ability of the state to deliver basic
services in the country," the UN Office for
the Coordination of Humanitarian Affairs (OCHA)
said.
The focus of this
year's aid efforts will be assistance to
refugees, IDPs and children affected by armed
conflict, with nearly USD 29 million of the
requested funds allocated for these groups.
Recent studies by
the UN Children's Fund (UNICEF) indicate that
only 39 per cent of the country's population have
access to adequate toilet facilities while 50 to
70 per cent of the drinking water in many
districts is contaminated.
In addition, the
acute malnutrition rates hover around 13 per
cent, with children being the most affected
group, especially in the hill areas where over 65
per cent of children are stunted and almost 50
per cent are underweight.
The country also
hosts some 107,000 Bhutanese refugees, who also
require humanitarian assistance.
Last year donors
contributed some USD 72.6 million over 70 per
cent of the total requested in the CATS 2007 for
Nepal.
The Appeal, an
action plan developed by the Inter-Agency
Standing Committee (IASC) in Nepal with aid
partners on the ground, will be revised in
mid-year in response to changes in the
humanitarian and socio-political situation in the
country, OCHA said. (PTI)
US overstates
nonproliferation Success: Watchdog ....
WASHINGTON,
Jan 12: The US Department of Energy has
overstated the success of a long-standing program
to prevent former Soviet nuclear scientists from
selling their secrets to the highest bidder, a US
watchdog said.
The US Initiatives
for Proliferation Prevention program was launched
a few years after the 1991 collapse of the Soviet
Union to provide employment to former Soviet
scientists involved in weapons of mass
destruction development.
Western officials
feared unemployed WMD scientists could be enticed
to share their knowledge with rogue states and
terrorists.
But a report by
the Government Accountability Office yesterday
said the department had overstated the number of
WMD scientists aided by the program and cast
doubt on the stated number of private-sector jobs
created.
Department
officials had no immediate comment on the
report's assertions.
The GAO, a
nonpartisan investigative arm of Congress, said
the program claimed to have supplemented the
income of more than 16,770 weapons scientists,
engineers and technicians in Russia and other
former Soviet states.
A GAO study of 97
program projects involving 6,450 scientists
showed more than half the participants did not
claim to possess any weapons-related experience,
GAO said.
Scientists without
WMD experience received about 10 million dollar
in payments, or 40 per cent of the money those
projects paid their personnel.
Officials from 10
Russian and Ukrainian institutes told GAO
investigators that program money had also helped
attract and retain not older former Soviet
scientists but younger recruits who might
otherwise emigrate to the United States or other
Western countries.
The GAO report,
submitted last month to the US House of
Representatives Homeland Security Committee, also
raised questions about the program's claim to
have helped create 2,790 long-term private-sector
jobs for former weapons scientists.
''The credibility
of this number is uncertain,'' the report said.
''(The department)
relies on 'good-faith' reporting from US industry
partners and foreign institutes on the number of
jobs created and does not independently verify
the number of jobs reported to have been
created.''(AGENCIES)
Twins separated
at birth met and married ........
LONDON,
Jan 12: Twins who were taken away from each
other as babies met later and got married without
knowing they were brother and sister, according
to a member of the House of Lords.
David Alton
recounted the story to parliament last month to
support his argument that children who are
artificially conceived should be told who their
biological parents are.
Alton said he had
heard the story of the separated twins from a
High Court judge who had dealt with the case.
''This did not
involve in vitro fertilisation: It involved the
normal birth of twins who were separated at birth
and adopted by separate parents,'' said Alton, an
independent member of the Lords.
''They were never
told that they were twins.''
''They met later
in life and felt an inevitable attraction, and
the judge had to deal with the consequences of
the marriage that they entered into and all the
issues of their separation,'' he said.
''I suspect that
it will be a matter of litigation in the future
if we do not make information of this kind
available to children who have been donor
conceived,'' he said.
Alton could not
immediately be reached for comment and no further
information was available about the twins or
where they were from.
''I think it's a
very tragic story for the people involved,'' said
Pam Hodgkins, head of a group that helps adults
affected by adoption.
''It is a lesson
that we need to learn and apply to the situation
of donor-conceived children,'' she told Sky News.
''Whilst ...
Nowadays it would be most unusual for siblings to
be separated ... The risk of secrecy affecting
the lives of people born as a result of egg and
sperm donation is exactly the same as the risks
that have affected adopted people in the past,''
she said.
(AGENCIES)
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