Congratulations, it is an eye opener to other states that are thinking of such schemes.
In Hyderabad, the government...
Thanks. You have raised a very pertinent issue. My family is a great lover of Makhana and we use it in different ways. Slowly...
INSPITE of recent advances in forensic,
science, such as the development Of DNA
profiling technique, the conventional
fingerprint tests continue to remain an
important aid to identify an individual
suspect at the scene of crime. Now
researchers from the University of
Wales, in Swansea, UK, have developed a
new technique for detecting fingerprints
and footwear impressions found at
the scene of crime, which they claim
offers many advantages over the
The novel technology employs
finely powdered magnetic flakes, developed at the university's department of
material engineering, that can produce
clear and identifiable impressions under
conditions which would defeat existing
finger print powders, they claim.
Traditionally, fingerprints are developed using fine flake powders applied
with a glass-fibre or animal-hair brush
to areas where crime fighters suspect
that fingerprints could be found such as
door handles and window frames. The
flake powders tend to stick to the ridges
of a print, so that, gentle brushing of the
residue tends to clear the flakes from the
areas in between the ridges. The end
result is that the powder clings to the
surface in a manner which reproduces
the pattern of the original print, which
can be clearly seen and photographed.
Crime fighters have all along
employed highly reflective aluminium-based powders to reveal prints on dark
backgrounds, and darker powders for
use against lighter backgrounds.
"Unfortunately, this method has one
real drawback," argues B Wilshire, professor in the department of materials
engineering at the University of Wales.
Conventional detection methods may
damage prints because sweat contours
defining fingerprint ridge pattern can be
smeared by bristles of even soft brushes.
"This means that up to 10 per cent of
fingerprints found at the scene of a
crime- could be difficult or impossible to
identify for this reason alone. Further,
there are also associated long-term
respirable health risks for forensic
experts who are constantly exposed to
dust clouds generated during standard
powder dusting operations at scenes of
crime," he explains.
Though these drawbacks can be
reduced substantially by the use of alternative mixtures called magna powders
- they consist of mixture of spherical
iron particles with fine flakes of non-
magnetic aluminium - but the fine
magnetic flake powders developed at
the University of Wales are even more
effective, claims Wilshire.
"Since these are made up entirely of
magnetic flakes, not only do they reduce
the danger of prints being smeared or
smudged, but also produce extremely
fine prints over a wide variety of surfaces," he says. "Further, the magnetic
flake methodology also eliminates any
risk to the health of investigating
The magnetic powders can be
supplied in light or dark flakes to
provide a contrast with any type of