The Rural Voice, 1998-04, Page 14QUICK -FIT
INTERCHANGEABLE
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Single European -Style Spear
SE500
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HORST WELDING
R.R. 3, Listowel, Ontario N4W 3G8
(519) 291-4162 FAX (519) 291-5388
Dealer enquiries invited
10 THE RURAL VOICE
Scrap Book
Mixing hybrids could boost yields
If researchers in Australia and
China are right, doctors could soon
have a new weapon in their fight
against cancer and cattle farmers
could have a valuable new by-
product of their animals.
A team of researchers from the
Commonwealth Scientific and
Industrial Research Organization
(CSIRO) is working to identify
special factors in the cartilage of
cattle that have been shown by
international research to prevent a
cancerous tumour from developing
a blood supply and spreading to the
rest of the body.
"Overseas scientists have
demonstrated that certain extracts of
shark cartilage, injected into tum-
ours, cause them to regress," said
Dr. Greg Harper, team leader of
CSIRO's laboratory in Rockhamp-
ton, New South Wales. "They also
appear to inhibit the development of
blood vessels to the cancer, which
allows them to spread around the
body."
Harper's work has established
that similar factors occur in bovine
cartilage.
"To reach the body's blood
supply and spread, a cancer first has
to pass through a matrix of extra-
cellular material," he said.
Cartilage is a tissue that fun-
ctions without nerves, blood vessels
or a lymphatic system and consists
largely of extra -cellular material and
it is these characteristics which
make it useful in trying to stop a
cancer from spreading.
"It also contains factors which
interfere with the cancer's passage.
We believe that by increasing these
factors, the cancer is forced to
expend more energy in trying to get
through the extra -cellular matrix,
making it far more difficult for it to
spread, or metastasize," he said.
These factors go by the family
name of glycosaminoglycans, or
"gags". Harper and researcher
Xiaoyi Qui from Beijing's Tiantan
Hospital in China are trying to
identify and characterize the
particular gags in bovine cartilage
that do the best job in inhibiting
cancer spread.
The market for shark cartilage is
worth $1 billion a year in the U.S.
alone but sharks are in short supply.
Shark cartilage sells for $250-$500
(Cdn) per kilogram. If cartilage
from cattle can be substituted it will
mean a reliable new supply for the
medical community and a new by-
product for the beef industry.0
— Source: Western Producer
Chicken manure goes up in smoke
Chicken manure may be good fertilizer but in Britain it may help green the
earth a different way. Two small power plants in Britain already burn poultry
litter in conventional boiler systems but a new plant operated by Agrigen of
Cheltenham, plans to generate 75 million kilowatts of power per hour by burning
120,000 tonnes of poultry litter a year.
The plant, to be built at Northampton in central England, will use a bubbling,
fluidised -bed combustion system to create steam to power a generator. The
fluidised bed is made up of sieved natural sand. After the sand is heated to about
300 degrees Celsius, poultry litter is fed into the bed from a hopper above. Light
material combusts instantly on contact with the sand particles, while heavier
material is combusted when it falls into the bed itself.
Agrigen says that this double action results in a much larger combustion zone
with a high degree of turbulence and high heat transfer rate within the bed,
resulting in a complete combustion of the fuel. About 38 tonnes of steam per
hour will result and this will drive a turbine with a capacity of 11.6 megawatts.
"Poultry litter is a remarkably clean fuel with significantly lower emissions
than coal when burned in a fluidised -bed boiler," says Derck Howard -Orchard of
Agrigen. It produces ash residue that can be used for phosphate -rich fertilizer.
The system will have a double benefit for Britain's environment by creating
power using low -emission fuel and using some of the 1.4 million tonnes of
poultry litter created yearly, preventing methane production.0
—Source: British Information Services