Author Archives: markdowe1

Britain, Economic, Energy, Environment, Government, Politics, Society, Technology

Fracking and drilling for shale gas…

SHALE TRAIL

Will the UK Government’s latest ‘dash for gas’ with fracking be a golden repeat of the North Sea oil boom or become a serious risk to public health and safety?

Opinion is divided between green opponents of attempts to cash in on the controversial resource and those proponents who argue vast deposits of gas below much of the country will dig Britain out of its energy crisis.

The debate has been stoked following claims in June by the British Geological Society that there could be more than 1,300 trillion cubic feet of shale gas under the North of England alone.

At current predictions, around 10 per cent of this should be recoverable – enough to fuel the nation for about 40 years, according to supporters.

And last month Chancellor George Osborne unveiled some of the most generous tax breaks in the world to kick-start this energy revolution in Britain.

The Treasury says that taxation on shale gas will be cut from 62 per cent to just 30 per cent, which the Chancellor reckons could boost investment in the industry to £14 billion a year.

It won’t just be companies that will gain. Local communities in those areas where extraction takes place will scoop 1 per cent of production revenues, as well as £100,000 per fracking well.

The United States has already benefited from its own shale gas boom, relying far less on oil imports now and providing energy consumers with a much cheaper alternative. According to the ratings agency Moody’s, the shale gas boom in America has generated more than 1 million US jobs.

For investors, too, the potential is huge.

If fracking’s potential is as good as we’re being told it could be, there will soon be a surge in profitability, rising share prices and attractive returns on offer for shareholders of those firms leading the charge. While there remains a long road to travel yet in terms of legislation and testing, the excitement building in the City of London is tangible.

Companies with licences for British shale areas have understandably welcomed the tax break announcements by the Chancellor. Those set to benefit include Aim-listed IGas and Dart Energy, equipment-maker John Wood Group and British Gas-owner Centrica – which acquired 25 per cent of Cuadrilla Resources in June.

Of course, the environmental concerns have to be weighed against the commercial benefits. But even the most ardent green lobbyist must recognise that Britain is facing a crisis of epic proportions when it comes to security of energy supply.

The UK is already a net importer of gas. Any interruption in supplies risks hiking up domestic and business energy bills or even seeing some customers cut off. Our coal-fired plants are closing or already shuttered.

Meanwhile, nuclear energy is in disarray with no new plants likely for at least another decade. There is still no sign of agreement on the crucial strike price – the guaranteed minimum EDF would get for power generated at a new plant.

Green technologies like wind are as yet incapable of fulfilling all our everyday energy needs.

The introduction of a tax regime that levels the playing field for shale gas with small offshore oil and gas fields must surely be a welcome step in the right direction.

But the industry will need to be tightly regulated to minimise the chances of something going wrong. Lobbyists have legitimate concerns over the chemicals used in the fracking process contaminating local water supplies, and the anecdotal evidence elsewhere that drilling for shale gas can increase the risk of earthquakes.

Drilling and fracturing must be strictly controlled. Three government agencies, plus the local authority, will have to sign-off on every project. Environmental impact assessments will be necessary along with permits to be agreed before fracking begins.

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Arts, History, Philosophy, Science

Quantum Leaps: Robert Hooke…

1635 – 1703

Perhaps one of the most ‘underrated’ scientists of the seventeenth century, Robert Hooke, an Englishman, experimented and made advances in a wide range of scientific areas. Yet because of this breadth of coverage, he seldom developed any of his concepts to their fullest extent. This explains why he rarely gained credit for them. Indeed, it is arguable that his role as a provider and facilitator to others is his most important legacy.

Boyle’s Assistant – The most obvious example of his contribution to others was the work he undertook with Robert Boyle at Oxford, where they met in 1656. Boyle, as the aristocrat, was clearly the dominant partner in the relationship, in social terms at least. Hooke, as his assistant, acted on Boyle’s instructions, yet many of his creations were worthy inventions in their own right. The most obvious example is the air pump that he devised in 1659, the most efficient vacuum creator of its time. It enabled Boyle to go on to make many of his discoveries.

Provider of Ideas – Moreover, Boyle was responsible, albeit indirectly, for keeping Hooke in his position as jack of all sciences, master of none. The aristocrat had been influential in having Hooke elevated to the position of Curator of Experiments for the Royal Society in 1662. While the prestige of the role pleased Hooke, the job requirement of showing ‘three or four considerable experiments’ to the Society at each of its weekly meetings was almost certainly the factor that ensured Hooke would never have the time to develop any of his findings fully.

A Source of Ideas – Another scientist to whom Hooke felt he had provided source material was the Dutch physicist Christian Huygens. Huygens is credited with creating the influential wave theory of light, which he published in 1690. Yet as early as 1672, Hooke had explained his discovery of diffraction (the bending of light rays) by suggesting that light might behave in a wave-like fashion.

In 1662, Robert Hooke became the first Curator of Experiments to the Royal Society. In 1670 he discovered the ‘law of elasticity’.

In 1662, Robert Hooke became the first Curator of Experiments to the Royal Society. In 1670 he discovered the ‘law of elasticity’.

Isaac Newton vehemently argued against Hooke’s theory of light, beginning a bitter feud which would continue for the rest of Hooke’s life. Hooke also claimed to have discovered one of the most important theories credited to Newton, arguing that the latter had plagiarised his ideas from correspondence between the two during 1680. Certainly, Hooke’s letters suggested some notion of universal gravitation and hinted at an understanding of what later became Newton’s law of gravity. In spite of this, though, it is unquestionable that Newton’s mathematical calculations and endeavours in proving the law give him a much stronger claim.

Robert Hooke’s countless experiments did, however, result in some other discoveries solely credited to him. He was, for example, the first to describe the universal law that all matter will expand upon heating. He is credited with the law of elasticity, discovered in 1670. Also known as Hooke’s Law, it states that the strain, or change in size, placed upon a solid – when stretched – is directly proportional to the stress, or force, applied to it. Hooke was also the first person to use the word ‘cell’ in the scientific sense understood by us today, after observing the properties of cork under one of the powerful microscopes that he had developed. This word was used in his 1665 work Micrographia or Small Drawings, which also included many other advances such as Hooke’s theory of combustion, as well as other discoveries of the microscope. These included crystalline structure of snow, and studies of fossils which led to the proposition that they were the remains of once living creatures. He suggested that whole species had lived and died out long before man, centuries before Charles Darwin came to the same conclusion.

Hooke also made discoveries in astronomy, locating Jupiter’s Great Red Spot, and proposed that the huge planet rotated on its axis.

Further accreditations – Hooke’s inventions were greatly influential. He either invented or significantly improved the reflecting telescope, compound microscope, dial barometer, anemometer, hygrometer, balance spring (for use in watches), quadrant, universal joint and iris diaphragm (later used in cameras). He also showed impressive vision, foreseeing the development of the steam engine and the telegraph system.

Beyond this he was an accomplished architect who designed parts of London following the great fire of 1666.

Inset – In 1662, Robert Hooke became the first Curator of Experiments to the Royal Society. In 1670 he discovered the ‘law of elasticity’.

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Health, Medical, Research, Science, United States

Eye tests may detect early onset of Alzheimer’s…

AMYLOID PLAQUES

Two new eye tests in America are being trialled that one day may help doctors to detect the very early stages of Alzheimer’s disease.

Newly released research has revealed that non-invasive retinal testing is now being trialled by scientists in the U.S. that could help flag up the condition by alerting clinicians to the presence of amyloid plaque deposits, a known biological marker of the disease.

Early stage testing could mean that patients are diagnosed or registered as high-risk up to twenty years before noticeable symptoms begin, helping patients get treatment before memory loss develops.

Scientists generally accept that amyloid plaques (a type of residual protein deposit) in the brain are a key marker of the disease.

This site incorporates a science and biology page. Click the image icon to view it.

This site incorporates a science and biology page. Click the image icon to view it.

Neurologists have believed for a long time that there is a correlation between the amounts of amyloid in the eye and residual protein deposits in the brain. The argument for this correlating factor is a strong one because the retina is formed from the same tissue as the brain when a foetus is developing in the womb.

To confirm this theory, two tests have been developed and trials are currently underway. The tests are known as the Retinal Amyloid Index (by NeuroVision) and the Sapphire II (by Cognoptix).

Ocular based examinations through the years have been used to detect and diagnose Alzheimer’s at any early stage through methods such as optic nerve cupping, pupillary response to tropicamide dilation and ocular muscle movement. However, all have failed to withstand the test of time in terms of sensitivity and specificity.

Professor Keith Black is chairman of the Department of Neurosurgery at Cedars-Sinai Medical Centre in Los Angeles, and co-founder of NeuroVision. He says that if people are going to get Alzheimer’s they begin to develop the hallmarks, such as amyloid deposits, in their 50s.

Professor Black said:

… The key for having an effective treatment for AD is early detection. You want to prevent those brain cells from being killed or dying in the first place.

The Sapphire II test works by measuring the amount of photons (i.e. light particles) captured when scanning the eyes. The amount of photons captured directly correlates with the amount of amyloid in the eye.

Experts state that the Sapphire II is currently in phase one of two in clinical feasibility trials, and that phase three is expected to begin in 2014.

Approximately 800,000 people in Britain suffer from Alzheimer’s and other forms of dementia. The number of cases is predicted to double within a generation.

There is no cure for Alzheimer’s disease and existing drugs can only alleviate symptoms. The condition is diagnosed by memory tests and, in some cases, through brain scans.

Presently, the disease can only be confirmed by a post-mortem examination, which reveals the presence of harmful amyloid plaques in the brain.

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