Category Archives: Science

Arts, History, Science, United States

Quantum Leaps: Benjamin Franklin

1706 – 1790

Benjamin Franklin was one of the five men who drafted the Declaration of Independence of 1776. He was also a prolific scientist.

Benjamin Franklin had a rare genius. Unlike most of the scientists chronicled on this site who were known for their outstanding talents and contributions to science, the American Franklin was brilliant in a wide range of arenas. In a five-year period between 1747 and 1752, he contributed more to science than most scientists would achieve in a lifetime of dedicated study. Yet, during other periods of his life, he operated in, and conquered, completely different fields. He was a master printer and publisher, a successful journalist and satirist, an inventor, a world-famous ambassador and, probably most notably of all, a politician at a vital time in American history. Indeed, Franklin was one of the five separate signatories of the Declaration of Independence from Great Britain in 1776 and was a key participant in the later drafting of the American Constitution.

. Studying Electricity

Franklin does, however, merit an entirely separate entry for his achievements in physics alone – he was a pioneer in understanding the properties and potential benefits of electricity. Although the phenomenon of electricity had been noted since the time of the ancients, very little was known about it from a scientific perspective, and many considered the extent of its usefulness to be limited to ‘magic’ tricks. At around the age of forty, Franklin became fascinated by electricity and began to experiment with it, quickly realising it was a subject worthy of scientific study and research in its own right. So, he sold his printing interests and dedicated himself for the next five years to understanding it.

. Flying a Kite

Although Franklin wrongly believed electricity was a single ‘fluid’ (this was an advance on earlier theories which posited the idea of two different fluids), he perceived this fluid to somehow consist of moving particles, now understood to be electrons. More importantly, he undertook important studies involving electrical charge and introduced the terms ‘positive’ and ‘negative’ in explaining the way substances could be attracted to or repelled by each other according to the nature of their charge. He also believed these charges ultimately cancelled each other out so that if something lost electrical charge, another substance would instantly gain the amount being cast away. His work on electricity reached its peak in his now famous kite experiment of 1752. Believing lightning to be a form of electricity, and in order to prove it, Franklin launched a kite into a thunderstorm on a long piece of conducting string. Tying the end of the string to a capacitor, he was vindicated when lightning did indeed charge it, proving the existence of its electrical properties. From these results and realising the potential of a device that could deflect the harmful effects of lightning strikes away from buildings and property, he developed the lightning conductor.

Franklin had also published his text Experiments and Observations on Electricity, made at Philadelphia in America in 1751, which went on to inspire future scientists in the study and development of the uses of electricity.

. A Prolific Inventor

From 1753 the time Franklin dedicated to science reduced dramatically due to his taking up a new post as deputy postmaster general and, later, political and ambassadorial roles. He did, however, leave a legacy of other inventions from the wide range of experiments conducted throughout his life, including: an iron furnace ‘Franklin’ stove (still in use today), bifocal spectacles, the street lamp, the rocking chair, the harmonica, an odometer and watertight bulkheads for ships. Franklin also came up with the idea of Daylight Saving Time and was the first to charter the Gulf Stream from observations made by sailors.

A man of many talents, Benjamin Franklin was a successful inventor, politician, printer, oceanographer, ambassador, journalist and, of course, scientist.

. The Legacy of Benjamin Franklin

Franklin’s legacy, in addition to the many inventions such as lightning conductors, bifocal lenses and street lamps, was one of learning. He established one of the first public libraries, as well as one of the first universities: Pennsylvania, in America.

On a broader societal level, he established the modern postal system, set up police and fire fighting departments and established the Democratic Party.

He certainly lived up to his own quotation, ‘If you would not be forgotten as soon as you are dead and rotten, either write things worth reading, or do things worth the writing.’

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Medical, Research, Science

Inside Track: ‘Head rush’

MIND & BODY

THE CONNECTION between cardiovascular activity and mood is more than a feeling; it’s scientific fact. There is a growing body of evidence to show that exercise doesn’t just make you happier, it makes you smarter, enhancing your ability to solve problems, brainstorm ideas, and by thinking faster.

Exercise improves your cognitive functioning no matter what your age. Cognitive functioning refers to the mental processes – awareness, perception, reasoning, and judgement – by which knowledge is acquired. While earlier research efforts have focused on children and the elderly, study populations have broadened significantly in recent times, the results proving that everybody – as well as every brain – can benefit from regular exercise.

Many studies have been completed on the relationship between physical activity and mental performance and have found that most had a shared conclusion. One such finding is that the short-term effects of a bout of exercise can lead to a greater focus and for individuals to make fewer errors in decision making. Several of the studies also found that during and/or following a bout of vigorous exercise (typically, running or cycling for 20 minutes to an hour), individual performances on tests measuring ‘executive control’ (the processes involved in achieving goals in a changing environment) improved significantly when compared with pre-exercise scores.

The use of exercise to spark creativity is hardly a novel idea. Among today’s creative exercisers, the award-winning writer Joyce Carol Oates says she avoids rest days because her craft depends on running: ‘There isn’t any piece of my writing that didn’t evolve through running,’ says Oates, who runs daily on the country roads near her home.

It’s not just literary types who see the benefit. The chief operating officer of a global junk-removal business based in Vancouver, for instance, knows his miles are anything but junk. The executive says that when out running a mental zone is soon found within that allows many of life’s problems to be solved. The business chief has a whole office of fitness diehards – and, keeps an eye out for similar types who may wish to join the firm in the future. ‘We look to hire athletes,” says the director, who finds fit people more focused and engaged.

Investigators elsewhere would also tend to agree. Previous tests carried out at the University of Ulm, in Germany, for example, asked a group of subjects to run 30 minutes twice a week for six weeks. Another group remained sedentary for the same time period. Following each session (or non-session), participants were examined to measure concentration. The runners scored higher, but it didn’t end there. The lead researcher concluded: ‘Twelve weeks after they stopped running, we could still see some effects.’

Scientists now know that the body’s dopamine and epinephrine levels are responsible for this effect. These neuro-transmitters, which enhance communication between key areas of the brain, climb during physical activity. The effects are fleeting, however, peaking about 20 minutes into exercise and petering out shortly after its conclusion, but other neurochemicals may take over where those leave off, responsible for the longer-term effects reported by researchers.

One of the next areas of intense study and research will be the exact prescription. Many agree that we need dose-response studies to see just how much exercise will produce the best cognitive results.

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Health, Medical, Research, Science

New heart drug offers biggest breakthrough since statins

MEDICAL RESEARCH

Unlike other treatments that tend to focus on cholesterol, Canakinumab works to lower inflammation in the body.

The discovery of a new heart drug is being hailed as the biggest breakthrough since statins. Thousands of lives could be saved.

In a four-year trial, scientists found that the drug – given by injection every three months – cut the risk of heart attacks by a quarter.

The study involving 10,000 patients, and around 1,000 doctors in 39 countries, also suggested that the drug could halve the risk of dying from lung cancer and prevent arthritis and gout.

Scientists said the treatment marked “a new era of therapeutics” that could save thousands of lives.

The drug, canakinumab, works by reducing inflammation – a major new approach in heart medicine. For the past 30 years cholesterol-busting statins have been given to nearly all people deemed to be at risk of cardiovascular disease in an effort to save them from heart attacks and strokes.

Yet half of the 200,000 people who have a heart attack in Britain each year do not have high cholesterol, so there is a desperate need for a different approach to treatment.

Experts have long thought that inflammation – the body’s natural responses to infection or injury – might also play a major role in causing heart attacks and strokes, possibly because it causes swelling in the arteries, increasing the risk of a blockage.

The new trial, however, is the first definitive proof that cutting inflammation slashes heart risk.

Study leader Professor Paul Ridker of Harvard Medical School said the new drug opened up a “third front” in the war on heart disease, following the previous focus on cholesterol and lifestyle.

Presenting his findings at the European Society of Cardiology congress in Barcelona, Professor Ridker said: “These findings represent the end game of more than two decades of research, stemming from a critical observation – half of heart attacks occur in people who do not have high cholesterol.

“We’ve been able to definitively show that lowering inflammation independent of cholesterol reduces cardiovascular risk.”

Professor Ridker, whose results are published in the New England Journal of Medicine, added: “This has far-reaching implications.

“It tells us that by leveraging an entirely new way to treat patients – targeting inflammation – we may be able to improve outcomes for certain very high-risk populations.”

Canakinumab is an antibody that attacks an immune-system protein called interleukin-1, which in high levels results in increased inflammation throughout the body.

The scientific trial involved high-risk patients who had already suffered a heart attack – a group in desperate need of help because a quarter of patients suffer a second attack within five years, even with statins.

All patients in the trial took statins as well, but canakinumab cut the risk of repeat heart attacks by 24 per cent, over and above the impact of the cholesterol drug.

People who took the drug were 36 per cent less likely to be hospitalised with unstable angina, and 32 per cent less likely to require costly bypass surgery.

Researchers reported a sharp rise in infections, which killed one in every 1,000 patients. But patients had a 51 per cent reduced risk of lung cancer deaths – a finding they said was “very exciting”. Gout and arthritis, which are linked to inflammation, also fell.

Canakinumab manufacturer Novartis said it would seek a licence to use the drug for heart disease.

Canakinumab is used for inflammatory problems, including forms of arthritis, at the cost of £9,928 per jab. Experts said the price – £40,000 a year for heart patients – would have to be lowered for it to be made available on the NHS.

Professor Jeremy Pearson, of the British Heart Foundation, said: “These exciting trial results finally confirm that ongoing inflammation contributes to risk of heart disease, and could help save lives.

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