Sunday, August 21, 2005

A robotic system at Stanford Medical Center was used to perform a laparoscopic gastric bypass surgery successfully with a theoretically similar rate of complications to that seen in standard operations. However, as there were only 10 people in the experimental group (and another 10 in the control group), this is not a statistically significant sample.

If this surgical procedure is as successful in large-scale studies, it may lead the way for the use of robotic surgery in even more delicate procedures, such as heart surgery. Note that this is not a fully automated system, as a human doctor controls the operation via remote control. Laparoscopic gastric bypass surgery is a treatment for obesity.

There were concerns that doctors, in the future, might only be trained in the remote control procedure. Ronald G. Latimer, M.D., of Santa Barbara, CA, warned “The fact that surgeons may have to open the patient or might actually need to revert to standard laparoscopic techniques demands that this basic training be a requirement before a robot is purchased. Robots do malfunction, so a backup system is imperative. We should not be seduced to buy this instrument to train surgeons if they are not able to do the primary operations themselves.”

There are precedents for just such a problem occurring. A previous “new technology”, the electrocardiogram (ECG), has lead to a lack of basic education on the older technology, the stethoscope. As a result, many heart conditions now go undiagnosed, especially in children and others who rarely undergo an ECG procedure.

Thursday, December 18, 2008

A team of eight transplant surgeons in Cleveland Clinic in Ohio, USA, led by reconstructive surgeon Dr. Maria Siemionow, age 58, have successfully performed the first almost total face transplant in the US, and the fourth globally, on a woman so horribly disfigured due to trauma, that cost her an eye. Two weeks ago Dr. Siemionow, in a 23-hour marathon surgery, replaced 80 percent of her face, by transplanting or grafting bone, nerve, blood vessels, muscles and skin harvested from a female donor’s cadaver.

The Clinic surgeons, in Wednesday’s news conference, described the details of the transplant but upon request, the team did not publish her name, age and cause of injury nor the donor’s identity. The patient’s family desired the reason for her transplant to remain confidential. The Los Angeles Times reported that the patient “had no upper jaw, nose, cheeks or lower eyelids and was unable to eat, talk, smile, smell or breathe on her own.” The clinic’s dermatology and plastic surgery chair, Francis Papay, described the nine hours phase of the procedure: “We transferred the skin, all the facial muscles in the upper face and mid-face, the upper lip, all of the nose, most of the sinuses around the nose, the upper jaw including the teeth, the facial nerve.” Thereafter, another team spent three hours sewing the woman’s blood vessels to that of the donor’s face to restore blood circulation, making the graft a success.

The New York Times reported that “three partial face transplants have been performed since 2005, two in France and one in China, all using facial tissue from a dead donor with permission from their families.” “Only the forehead, upper eyelids, lower lip, lower teeth and jaw are hers, the rest of her face comes from a cadaver; she could not eat on her own or breathe without a hole in her windpipe. About 77 square inches of tissue were transplanted from the donor,” it further described the details of the medical marvel. The patient, however, must take lifetime immunosuppressive drugs, also called antirejection drugs, which do not guarantee success. The transplant team said that in case of failure, it would replace the part with a skin graft taken from her own body.

Dr. Bohdan Pomahac, a Brigham and Women’s Hospital surgeon praised the recent medical development. “There are patients who can benefit tremendously from this. It’s great that it happened,” he said.

Leading bioethicist Arthur Caplan of the University of Pennsylvania withheld judgment on the Cleveland transplant amid grave concerns on the post-operation results. “The biggest ethical problem is dealing with failure — if your face rejects. It would be a living hell. If your face is falling off and you can’t eat and you can’t breathe and you’re suffering in a terrible manner that can’t be reversed, you need to put on the table assistance in dying. There are patients who can benefit tremendously from this. It’s great that it happened,” he said.

Dr Alex Clarke, of the Royal Free Hospital had praised the Clinic for its contribution to medicine. “It is a real step forward for people who have severe disfigurement and this operation has been done by a team who have really prepared and worked towards this for a number of years. These transplants have proven that the technical difficulties can be overcome and psychologically the patients are doing well. They have all have reacted positively and have begun to do things they were not able to before. All the things people thought were barriers to this kind of operations have been overcome,” she said.

The first partial face transplant surgery on a living human was performed on Isabelle Dinoire on November 27 2005, when she was 38, by Professor Bernard Devauchelle, assisted by Professor Jean-Michel Dubernard in Amiens, France. Her Labrador dog mauled her in May 2005. A triangle of face tissue including the nose and mouth was taken from a brain-dead female donor and grafted onto the patient. Scientists elsewhere have performed scalp and ear transplants. However, the claim is the first for a mouth and nose transplant. Experts say the mouth and nose are the most difficult parts of the face to transplant.

In 2004, the same Cleveland Clinic, became the first institution to approve this surgery and test it on cadavers. In October 2006, surgeon Peter Butler at London‘s Royal Free Hospital in the UK was given permission by the NHS ethics board to carry out a full face transplant. His team will select four adult patients (children cannot be selected due to concerns over consent), with operations being carried out at six month intervals. In March 2008, the treatment of 30-year-old neurofibromatosis victim Pascal Coler of France ended after having received what his doctors call the worlds first successful full face transplant.

Ethical concerns, psychological impact, problems relating to immunosuppression and consequences of technical failure have prevented teams from performing face transplant operations in the past, even though it has been technically possible to carry out such procedures for years.

Mr Iain Hutchison, of Barts and the London Hospital, warned of several problems with face transplants, such as blood vessels in the donated tissue clotting and immunosuppressants failing or increasing the patient’s risk of cancer. He also pointed out ethical issues with the fact that the procedure requires a “beating heart donor”. The transplant is carried out while the donor is brain dead, but still alive by use of a ventilator.

According to Stephen Wigmore, chair of British Transplantation Society’s ethics committee, it is unknown to what extent facial expressions will function in the long term. He said that it is not certain whether a patient could be left worse off in the case of a face transplant failing.

Mr Michael Earley, a member of the Royal College of Surgeon‘s facial transplantation working party, commented that if successful, the transplant would be “a major breakthrough in facial reconstruction” and “a major step forward for the facially disfigured.”

In Wednesday’s conference, Siemionow said “we know that there are so many patients there in their homes where they are hiding from society because they are afraid to walk to the grocery stores, they are afraid to go the the street.” “Our patient was called names and was humiliated. We very much hope that for this very special group of patients there is a hope that someday they will be able to go comfortably from their houses and enjoy the things we take for granted,” she added.

In response to the medical breakthrough, a British medical group led by Royal Free Hospital’s lead surgeon Dr Peter Butler, said they will finish the world’s first full face transplant within a year. “We hope to make an announcement about a full-face operation in the next 12 months. This latest operation shows how facial transplantation can help a particular group of the most severely facially injured people. These are people who would otherwise live a terrible twilight life, shut away from public gaze,” he said.

Saturday, April 16, 2005

When the curtains were drawn and the anthem began, confusion flickered over the faces in the large hall which welcomed the NRA (National Rifle Association) to Houston. It was the sounds of rocker Ted Nugent’s rendition of the Star Spangled Banner. People didn’t know whether to put their hands over their heart, as was customary, or start clapping. According to reports, it was hard to determine what the “Motor City Madman” was doing.

That was the rowdy kick off Friday night of the convention expected to draw up to 60,000 people to the George R. Brown convention center for a weekend of guns, gun-politics, gun peripherals like scopes and carry bags, and stuffed trophy heads.

NRA CEO Wayne LaPierre told about 2000 listeners to “Let the enemies of freedom take notice, we in this room have beaten you…” He repeated it three times for effect.

Another opening act was country singer Charlie Daniels whose rant against those on the left of the political spectrum included a characterization of them as “save the whales and kill the babies pantywaists.” He then pursed his lips and did his interpretation of a pantywaist, according to the Houston Chronicle: “’If we just leave the terrorists alone, they’d leave us alone.’”

Elsewhere, visitors were charmed by stuffed heads of dead deer. NRA staffer Monty Embrey, working the booth with the heads, said that although they looked like small moose, they were full-blooded deer with unusual antlers.

The exhibit is owned by the NRA and travels around the country. “People don’t get to see a collection of heads very often. It’s a big deal,” said Embrey.

Saturday’s keynote address will come from right wing congressional representative Tom DeLay of Sugarland, Texas, whose district includes much of Houston.

Just Friday, another of DeLay’s most conservative associates became the second House Republican to ask DeLay to consider yielding his leadership post because of the many ethics problems that have dogged him.

Rep. Tom Tancredo, (R-Colo) said, “If the majority leader were to temporarily step aside so that these trumped up charges can be dealt with in a less hostile environment, as they have proven to be an unnecessary distraction, it may be a productive move.”

These comments follow on the heels of similar statements by Rep. Chris Shays, a Republican moderate from Connecticut and Rick Santorum, Republican Senator from Pennsylvania. All are concerned that the man in a political leadership position is a liability to their reelection bids, expected next year. He has not assuaged three charges against him by the Congressional Ethics Committee, comprised of half Republican and half Democratic members, except to blame his political opposition.

DeLay’s record keeping on millions of dollars was minimal and he has allegedly accepted money from Texas corporations in violation of the Texas law.

“A Travis County grand jury indicted DeLay political aide Jim Ellis, fundraiser Warren RoBold and John Colyandro, the executive director of DeLay’s political action committee, Texans for a Republican Majority, known as TRMPAC.The Washington Post reported in September that eight corporations also were indicted for illegal political contributions.”

The subject of DeLay’s speech was not known at press time.

The NRA now claims a membership of about 4 million.

Saturday, June 28, 2008

Football legend Sir Bobby Charlton has launched a new campaign he calls “There Must be a Better Way” to find a faster method to clear anti-personnel landmines. The initiative which comes under his “Laureus Sport for Good Foundation” and involves physicists, mathematicians and electronic engineers from the University of Manchester and Lancaster University. In addition the Mines Advisory Group, a mine clearance charity, and the security systems company Rapiscan are involved.

Charlton first became interested in the problem of clearing anti-personnel landmines while visiting Bosnia on a Laureus funded Spirit of Soccer camp. He was appalled by the injuries he saw, especially to children, caused by abandoned anti-personnel mines. Later his visited Cambodia where there are estimated to be four to six million mines. Charlton was told it would take 100 years to clear the mines.

On the way back to Manchester, passing through airport metal detectors, he thought that surely there must be a better way to detect landmines than the laborious method he had seen using only a metal detector and a bayonet. As the mines are made mainly of plastic and have only a small amount of metal every piece of metal including shrapnel must be investigated to see if it is a mine.

He contacted Rapiscan and through them the University of Manchester to see if there was anyone who could help. The University has a number of scientists and engineers with relevant experience, including a project EMBody to develop the next generation walk through metal detector, in collaboration with Rapiscan and Manchester Airport, and work on a scanning metal detector used to image steel reinforcing bars in concrete.

On June 12th a demonstration was arranged at a disused quarry where Sir Bobby and the Professors of Electrical Engineering, Mathematics and Physics were shown the power of explosives. This included a demonstration where an explosive charge of about 50g of high explosive, about the same amount as a medium sized landmine, was placed under a sand-filled Wellington boot. The charge was detonated with a resounding bang that echoed around the quarry. The boot was projected tens of metres in the air. And when examined the toe had been cut off and the rubber shredded. The shock wave from the explosives thumped the chests of the scientists even at a safe distance. One commented that there was no chance of using delicate instrumentation anywhere near a possible explosion and they had to seek simple solutions.

“Last time I saw a boot fly through the air like that it was against Bolton” said Charlton, but there was a sombre but excited mood as the scientists headed back to the University, buzzing with ideas.

Thursday, March 2, 2006

Buffalo, New York —In an unanimous vote, the City of Buffalo‘s Planning Board voted to table the Elmwood Village hotel Proposal, postponing voting on legislation for up to 30 days.

The Board said its decision was due to the lack of public involvement, saying that there have not been enough meetings.

The Elmwood Village Hotel is a proposed project by Savarino Construction Services Corporation and was designed by Karl Frizlen of The Frizlen Group. The hotel would be placed on Elmwood and Forest Avenues in Buffalo, New York. In order for the hotel to be built, at least five buildings, that include both businesses and residents, must be demolished.

The Forever Elmwood Corp. is a Buffalo-based non-profit organization founded in 1994. Justin Azzarella, the Executive Director for the organization voiced support for the proposal, stating: “I am here today to lend Forever Elmwood’s support the hotel project. Particularly, Forever Elmwood is encouraged by the fact that this building follows the more stringent Elmwood Village Design Guidelines. We have been speaking with Savarino Construction, and they have promised us [Forever Elmwood] that they will engage the community further, including the surrounding Block Clubs and businesses. For that reason, while Forever Elmwood is in support of this project and the type of project that it is, we are asking also that the project be tabled so that the community can be further engaged. Specifically the surrounding Block clubs which include the Granger, Claremont, Asland and The Lincoln Parkway Block Clubs.”

“Because of the excellent work that Karl does and the game plan that they have, I think its an ideal use of this particular location. I think that this particular type of development needs to be encouraged and promoted as opposed to roadblocked,” said a man who owns five properties near the proposal site.

However, Evelyn Bencinich, a resident of Granger Place and whose house would be located directly behind the hotel said, “My property value will be depreciated or non-existent because no one is going to want to live behind a multi-story hotel. We are facing up to a year of noisy and dangerous demolition and construction. Children, pets and even drunk rebellers could wander on site and get hurt. Traffic tie-ups caused by large machinery and garbage bins is inevitable. Where will pedestrians walk? We could experience increased unsanitary flooding in our yards and basements due to the digging and cementing for the underground parking garage. Rats will be displaced into the immediate neighborhoods and be in great abundance. Once we get past the year of nightmare construction, what if you build it and they don’t come? We could ultimately have a seven million dollar rooming house on our corner.”

Patty Morris, co-owner of Don Apparel with Nancy Pollina at 1119 Elmwood also asked that the project be tabled saying, “this has only been public knowledge for less than two weeks and the public never saw the redesign. How can you vote on anything that no one has seen yet? The Board cut off Morris saying, “so specifically you don’t have any problem with it [the design] you just…” Morris then said, “Oh I am totally against this project, but thats besides the point isn’t it.”

The planning board is also concerned that the current design may still be too big.

At one point Board member Susan Curran Hoyt said, “we know you’ve cut down your number of rooms on this project, but we still see it doesn’t seem to fit the description of a ‘botique’ hotel,” and asked Eva Hassett, Vice President of Savarino Construction, “we wonder if you could reduce the rooms further.”

“One thing I didn’t talk about was the price levels of these rooms and that will be important to know. The room rate will be somewhere between US$120 and $160 a night, which is about the same price of the Hampton Inn down town and the smaller you make the hotel, the more expensive the rooms will get. We believe that we’ve made a good compromise in terms of the size of the hotel and perhaps botique means different things to different people,” said Hassett.

The board was also concerned that there is not enough parking asking, “are there alternative plans for valet parking off-site, in the event that you have a full hotel or a large event going on?”

“We are exploring several possibilities with respect to additional parking for valet and parking near-by,” replied Hassett. “We are also exploring the possibility of using the rear of 1105 Elmwood for additional parking, which would give us an additional ten or eleven spaces.”

The new design has a total of 55 parking spaces for 72 rooms, with 39 of them underground and the rest on ground level.

Hassett also said that a “parking study” will be done on the area.

Concerns that the second floor of the hotel will be too close to the property of 605 Forest were also brought up. The board asked how far the hotel would be from the property and Karl Frizlen replied saying it would “be approximately five feet from the property line,” but he also admitted that, “I do not know exactly how close the house next door” will be from the hotel, but did say “I think the house is about four or five feet away from the property line and we [the hotel] sit right on the property line.”

The board is concerned the setback from the property is not enough saying the space between the building and the hotel is “pretty narrow.”

The City’s Common Council also agreed to table the proposal also citing the need for more public engagement and the need for more organizations to respond including the Buffalo Preservation Board and the Office of Historic Preservation.

During that meeting, Hassett also said the proposal to try and get a variance to obtain the properties of 605 and 607 Forest were “now off the agenda.”

The Common Council is expected to meet and hold a public hearing about the project and the rezoning of the properties to be demolished (1119-1121 Elmwood) on Tuesday March 7, 2006 at 2:00 p.m. in Council Chambers at City Hall. At the moment the properties are not zoned for a hotel.

Tuesday, February 28, 2006

The Centre for Independent Studies has released a paper calling for reform of university student fees system. The paper, authored by Andrew Norton, argues that the cap on loans to full fee paying students is too low. The current cap allows for loans during a lifetime of AU$50,950.

“Setting the FEE-HELP limit at this amount biases the market against courses that are long or have high per year costs, or both,” argues Norton in the paper. “The loan cap is a crude way of controlling lending, taking no account of course costs or capacity to repay.”

According to Norton, this undermines student choice and competition. He argues that the system should function more like commercial lending.

“A truly radical reform would make student loans mimic commercial loans: students with good earning prospects could borrow large sums, other students could borrow less, and some could not borrow at all,” he said. “Instead of denying or limiting loans to people doing high cost courses, as now occurs, the government could deny loans to people who are unlikely to repay.”

The paper was criticised by Senator Kerry Nettle, Education Spokesperson for the Australian Greens. She argued that the changes would mean an increase in costs to students already struggling to pay, and called on Education Minister Julie Bishop to rule out the changes.

“To consider refusing loans to those deemed less able to repay would further cut off higher education for Australians from low socio-economic backgrounds,” she said. “Julie Bishop should use her address to the National Press Club tomorrow to rule out any moves to further deregulate the HECS system.”

“Student fees have spiralled upward under the Howard government and any further deregulation would just make a bad system worse,” she added.

Monday, April 6, 2009

Leaders and central banks in Russia, China, Malaysia, Indonesia, Thailand, and Kazakhstan have called for an international currency system.

Speaking on April 1 in advance of the G-20 summit in London, Russian president Dmitry Medvedev argued that the international finance system needed a “new construction” including “new currency systems”, saying that such a new system could be the purpose of a revamped IMF and World Bank. The IMF was originally founded in 1946 as the overseer of the Bretton Woods system, which from its founding until the 1970s tied the western world’s currencies to the US Dollar, which was in turn backed by gold. Russia’s proposal was for the new currency to serve as a reserve currency, one which would take the place of the dollar, euro, and other heavily-traded currencies as an international standard of exchange.

Medvedev’s comments are a reversal of Russian position from a lukewarm response following a looser outline for a worldwide currency by Kazakhstani president Nursultan Nazarbayev. On March 11, Nazarbayev suggested the establishment of the “acmetal”, a portmanteau of “acme” and “capital“, as a reserve currency replacing the ruble in international transactions, first for Central Asia and then worldwide. 1999 Economics Nobel laureate Robert Mundell, speaking to the Daily Telegraph, endorsed the idea, saying “It would be a very good idea if the G-20 took that idea up in London”.

2001 Nobel economics prize winner Joseph Stiglitz, meanwhile, said the new currency could come about quickly if it was based on an expansion of the IMF’s already established system of Special Drawing Rights, units of exchange used by the IMF which already have some of the features of currency. Stiglitz argued that, as the US dollar has become the standard global reserve currency, it has inadvertently created a system which hurts the world economy. “It’s a net transfer, in a sense, to the United States of foreign aid,” he argued, reasoning that when other countries purchase US dollars in order to use them on international markets (such as for the buying and selling of petroleum), they effectively give the US a zero-interest loan — sometimes at times when they can least afford it. Stiglitz made his comments as head of a United Nations panel of economists giving recommendations to address the global financial crisis.

In the weeks leading up to the G-20 conference, the People’s Republic of China also began discussing a new system for reserve currencies. In a March 23 speech, Zhou Xiaochuan, governor of the People’s Bank of China, endorsed a new reserve currency, saying “the desirable goal of reforming the international monetary system, therefore, is to create an international reserve currency that is disconnected from individual nations and is able to remain stable in the long run, thus removing the inherent deficiencies caused by using credit-based national currencies.” Zhou went on to endorse the expansion of the SDR system in the long-term creation of a reserve currency government by the IMF. While Zhou did not mention the US dollar specifically, analysis by Qu Hongbin, chief China economist for HSBC, for the Financial Times said that the speech “is a clear sign that China, as the largest holder of US dollar financial assets, is concerned about the potential inflationary risk of the US Federal Reserve printing money”.

China holds $740 billion as assets; inflation in the US economy, which has been low in recent years, would directly cause those assets to lose value.

While the Chinese government has engaged in currency swaps with several other growing economies, such as South Korea, Argentina, Malaysia and Indonesia, the Chinese Yuan cannot be used itself as a reserve currency as it cannot be freely traded on the global market.

The Chinese-Russian proposal was not entered onto the agenda at the G-20 meeting itself. Nonetheless, British Prime Minister Gordon Brown said that the G-20 was open to considering the proposal if and when a detailed one is presented. United States President Barack Obama, meanwhile, endorsed the continuation of dollar supremacy, saying that the US dollar is “extraordinarily strong” and arguing that its strength was the result of the intrinsic stability of the United States economic and political system; US treasury secretary Timothy Geithner had, the week before, made comments that while he supported an expansion in the SDR mechanism he rejected the idea of a global currency. Rather than change the role of SDRs, the G-20 meeting instead added $250 billion in support to the fund backing SDRs.

After the G-20 conference ended on Thursday, Malaysia’s The Star BizWeek reported that the central banks of Indonesia, Malaysia and Thailand had endorsed the Chinese proposal. All three countries have close economic ties with China and suffered heavily from the collapse of their currencies in the 1997 Asian Financial Crisis; the sudden growth in the value of the US dollar relative to those countries’ native currencies sharply increased debt in Southeast Asia’s economies, leading to a wave of bankruptcies.

International reaction from other economies has been mixed and guarded. Luiz Inacio Lula da Silva, President of Brazil, said that the currency proposal was important to discuss but did not give extensive comment. And while UPI reports that India supported the SDR proposal at the G-20 conference, the Indian Press Trust quotes Indian Prime Minister Manmohan Singh as saying last month, “It is too early to talk about common currency.”

Calls for an independent global reserve currency are not new. In 1944, John Maynard Keynes proposed the “bancor“, a unit like the SDR supported by a basket of commodities. Keynes’ idea was rejected and the US dollar took the equivalent role under the Bretton Woods system. Keynes proposed that the bancor system would be reinforced by a tax on participating countries’ current accounts, the difference between their exports and their imports, in order to encourage balanced trade. Meanwhile, monetary unions have become more popular since the end of the gold standard, with most of the European Union now trading the euro, and several countries outside the EU using it as a de facto currency; five West African countries adopting the eco at the end of this year; and the African Union planning to introduce the afro in 2028. Proposals for a North American currency union based around the so-called “amero” have been frequently discussed as the focus of conspiracy theories in the United States, but none of the US, Canada or Mexico have actively pursued the establishment of any such monetary union, however the dollar is the currency of several Latin American countries.

Saturday, July 12, 2008

Michael Ellis DeBakey, world renowned heart surgeon, has died in Houston, Texas at the age of 99.

He was born Michel Dabaghi on September 7, 1908 in Lake Charles, Louisiana, to Lebanese immigrants Shaker and Raheeja DeBakey.

DeBakey was the chancellor emeritus of Baylor College of Medicine in Houston, Texas, and director of The DeBakey Heart Center of Baylor and the Methodist Hospital.

DeBakey pioneered the use of Dacron grafts to replace or repair blood vessels. In 1958, to counteract narrowing of an artery caused by an endarterectomy, DeBakey performed the first successful patch-graft angioplasty. This procedure involved patching the slit in the artery from an endarterectomy with a Dacron or vein graft. The patch widened the artery so that when it closed the channel of the artery returned to normal size. The DeBakey artificial graft is now used around the world to replace or repair blood vessels.

Wednesday, January 10, 2007

Apple Inc. today has introduced the much-anticipated iPhone at the Macworld Conference in San Francisco.

The iPhone is claimed to be “a revolutionary mobile phone” as stated on the Apple website. The device appears to be running a mobile version of the Apple operating system Mac OSX. It is approximately the same size as a 5th generation iPod, it has a 3.5-inch LCD touchscreen display that is used to access all features of the phone including number dial, as well as making phone calls. The iPhone plays music, movies, displays pictures and is able to connect to a wireless network.

Apple CEO Steve Jobs unveiled the device by walking onto the stage and taking the iPhone out of his jeans pocket. During his 2 hour speech he stated that “Today Apple is going to reinvent the phone, We are going to make history today”.

Today Apple also released their Media Center device – Apple TV. It will directly compete with Microsoft’s Media Center operating system. Apple has taken a different approach to the media center market; rather than storing content (such as movies, music and photos) on the device, Apple TV connects to a computer (Mac and Windows) over a wirless network connection and plays all content stored on that computer. This makes it substantially easier for users to organize their media content.

Thursday, June 23, 2011

NASA’s Cassini–Huygens spacecraft has discovered evidence for a large-scale saltwater reservoir beneath the icy crust of Saturn’s moon Enceladus. The data came from the spacecraft’s direct analysis of salt-rich ice grains close to the jets ejected from the moon. The study has been published in this week’s edition of the journal Nature.

Data from Cassini’s cosmic dust analyzer show the grains expelled from fissures, known as tiger stripes, are relatively small and usually low in salt far away from the moon. Closer to the moon’s surface, Cassini found that relatively large grains rich with sodium and potassium dominate the plumes. The salt-rich particles have an “ocean-like” composition and indicate that most, if not all, of the expelled ice and water vapor comes from the evaporation of liquid salt-water. When water freezes, the salt is squeezed out, leaving pure water ice behind.

Cassini’s ultraviolet imaging spectrograph also recently obtained complementary results that support the presence of a subsurface ocean. A team of Cassini researchers led by Candice Hansen of the Planetary Science Institute in Tucson, Arizona, measured gas shooting out of distinct jets originating in the moon’s south polar region at five to eight times the speed of sound, several times faster than previously measured. These observations of distinct jets, from a 2010 flyby, are consistent with results showing a difference in composition of ice grains close to the moon’s surface and those that made it out to the E ring, the outermost ring that gets its material primarily from Enceladean jets. If the plumes emanated from ice, they should have very little salt in them.

“There currently is no plausible way to produce a steady outflow of salt-rich grains from solid ice across all the tiger stripes other than salt water under Enceladus’s icy surface,” said Frank Postberg, a Cassini team scientist at the University of Heidelberg in Germany.

The data suggests a layer of water between the moon’s rocky core and its icy mantle, possibly as deep as about 50 miles (80 kilometers) beneath the surface. As this water washes against the rocks, it dissolves salt compounds and rises through fractures in the overlying ice to form reserves nearer the surface. If the outermost layer cracks open, the decrease in pressure from these reserves to space causes a plume to shoot out. Roughly 400 pounds (200 kilograms) of water vapor is lost every second in the plumes, with smaller amounts being lost as ice grains. The team calculates the water reserves must have large evaporating surfaces, or they would freeze easily and stop the plumes.

“We imagine that between the ice and the ice core there is an ocean of depth and this is somehow connected to the surface reservoir,” added Postberg.

The Cassini mission discovered Enceladus’ water-vapor and ice jets in 2005. In 2009, scientists working with the cosmic dust analyzer examined some sodium salts found in ice grains of Saturn’s E ring but the link to subsurface salt water was not definitive. The new paper analyzes three Enceladus flybys in 2008 and 2009 with the same instrument, focusing on the composition of freshly ejected plume grains. In 2008, Cassini discovered a high “density of volatile gases, water vapor, carbon dioxide and carbon monoxide, as well as organic materials, some 20 times denser than expected” in geysers erupting from the moon. The icy particles hit the detector target at speeds between 15,000 and 39,000 MPH (23,000 and 63,000 KPH), vaporizing instantly. Electrical fields inside the cosmic dust analyzer separated the various constituents of the impact cloud.

“Enceladus has got warmth, water and organic chemicals, some of the essential building blocks needed for life,” said Dennis Matson in 2008, Cassini project scientist at NASA’s Jet Propulsion Laboratory in Pasadena, California.

“This finding is a crucial new piece of evidence showing that environmental conditions favorable to the emergence of life can be sustained on icy bodies orbiting gas giant planets,” said Nicolas Altobelli, the European Space Agency’s project scientist for Cassini.

“If there is water in such an unexpected place, it leaves possibility for the rest of the universe,” said Postberg.