Latest news with #plasma
Gizmodo
4 days ago
- Science
- Gizmodo
Astronomers Detect Entirely New Type of Plasma Wave Above Jupiter's North Pole
Since entering Jupiter's orbit in 2016, NASA's Juno spacecraft has been hard at work unveiling the many mysteries of our solar system's largest planet. And its latest discovery may be one of the most intriguing yet: an entirely new type of plasma wave near Jupiter's poles. In a paper published Wednesday in Physical Review Letters, astronomers describe an unusual pattern of plasma waves in Jupiter's magnetosphere—a magnetic 'bubble' shielding the planet from external radiation. Jupiter's exceptionally powerful magnetic field appears to be forcing two very different types of plasmas to jiggle in tandem, creating a unique flow of charged particles and atoms in its polar regions. Plasma is a key force in shaping Jupiter's turbulent atmosphere. As such, the researchers believe the new observations will further advance our understanding of not only Jupiter's weather events but also the magnetic properties of distant exoplanets. For the study, the researchers analyzed the behavior of plasma waves in Jupiter's magnetosphere containing highly magnetized, low-density plasma. The team, a collaboration between researchers from the University of Minnesota, the University of Iowa, and the Southwest Research Institute, Texas, found an unexpected oscillation between Alfvén waves and Langmuir waves, which reflect the movement of the plasma's atoms and the movement of the electrons in the plasma, respectively. Electrons are much lighter than charged atoms, meaning that, normally, the two wave types ripple at very different frequencies—which was clearly not the case for Jupiter's magnetosphere, prompting the researchers to take a closer look. The ensuing investigation unveiled a never-before-seen type of plasma oscillation near Jupiter's poles. 'The observed plasma properties are really unusual, not found before and elsewhere in our solar system,' John Leif Jørgensen, a planetary scientist at the Technical University of Denmark who wasn't involved in the new work, told New Scientist. Unlike Earth's auroras, which are caused by solar storms, Jupiter's auroras—a barrage of frisky, superfast particles that are hundreds of times more energetic than auroras on Earth—sometimes emerge as a product of its powerful magnetic field. Getting a better grasp on how such phenomena work could be valuable information for future missions in the search for alien life on exoplanets, according to the study authors. Detailed New Images of Jupiter's Aurora Reveal Strange and Unexplained Brightness 'While such conditions do not occur [on] Earth, it is possible that they apply in polar regions of the other giant planets and potentially in strongly magnetized exoplanets or stars,' the astronomers wrote in the paper. 'Jupiter is the Rosetta Stone of our solar system,' said Scott Bolton, Juno's principal investigator, in NASA's introductory page for the spacecraft. 'Juno is going there as our emissary—to interpret what Jupiter has to say.' Initially, NASA expected Juno's mission to conclude in 2017, when they would intentionally steer the spacecraft into Jupiter's atmosphere, a decision that adheres to NASA's planetary protection requirements. But Juno's flight path evolved over time, and NASA concluded that the spacecraft no longer posed a threat to Jupiter's moons. As a result, the agency authorized extensions to the mission. Heck Yes, NASA's Juno and InSight Missions Are Getting Bonus Time That being said, the scientists do believe that, by September this year, Juno's orbit will degrade naturally, and it will be gobbled up by Jupiter's atmosphere. However, this by no means ends humanity's exploration of Jupiter; Europa Clipper is slated to reach Europa, Jupiter's moon, in 2030 (the last time we checked, it did some sightseeing near Mars). Of course, even after Jupiter consumes Juno, scientists will still have loads of invaluable data from the spacecraft that they'll continue to meticulously analyze for years to come.
Japan Times
15-07-2025
- Health
- Japan Times
Freezer glitch affects blood products at Red Cross center in Tokyo
A freezer glitch rendered about 13,700 units of fresh frozen plasma blood unusable at the Japanese Red Cross Society's blood center in Tokyo in May, it was learned Tuesday. The incident did not affect deliveries of blood products to medical institutions, and the affected units will be used as materials for other products that can be stored at higher temperatures, officials of the center said. On May 11, a freezer at the blood center in Tokyo's Koto Ward lost power around 10:30 p.m. Before the power was restored about four hours later, the temperature of the fresh frozen plasma blood units inside was above the standard level of minus 20 degrees Celsius for about two and a half hours. The power cut was caused by a faulty device installation in the temperature control panel, the officials said. The Japanese Red Cross Society reported the incident to the health ministry on June 10. At a news conference on Tuesday, health minister Takamaro Fukuoka said the ministry strongly demanded the society report any incident in a timely manner.
ABC News
14-07-2025
- Health
- ABC News
Thousands from LGBTQI+ and sex worker communities can now donate plasma
Thousands of members of the LGBTQI+ and sex worker communities can now donate plasma in Australia without having to wait three months from the last time they had sex. On Monday, Australian Red Cross Lifeblood removed most wait time restrictions for gay and bisexual men, transgender people, sex workers and those on the common HIV prevention drug pre-exposure prophylaxis (PrEP). This change means an estimated 625,000 additional Australians are now eligible to donate plasma. Often referred to as the "liquid gold" part of blood, plasma is used to treat more than 50 medical conditions. During the HIV crisis in the 1980s, Australia introduced an indefinite ban on men who have sex with men from donating blood and plasma in order to prevent transmission through blood transfusion. Skye McGregor from the Kirby Institute said this was in part due to the lengthy time it took to confirm if HIV was present in test results. "To have no deferral now around sexual activity through the plasma pathway is really significant," Dr McGregor said. Other factors such as a 33 per cent drop in HIV diagnoses since 2014, and increased sensitivity of HIV tests — which can detect an infection within a week — have also contributed to the lifting of restrictions. "Whilst these changes were necessary in the past to ensure that blood safety, we also know that they did contribute to stigma within particularly the gay and bisexual community," Lifeblood chief executive officer Stephen Cornelissen said. From July 14, people in these previously restricted groups can donate plasma immediately, regardless of sexual activity. The only exception is for those who've recently had sex with a partner known to have HIV or another blood-borne virus. "It's a beautiful moment," Joshua Smith said, who donated for the first time on Monday. "Blood and plasma donations was one of the last things it felt like gay and bisexual people and trans communities were excluded from. Fellow donor Kane Wheatley added: "It's one of those things that you spend your whole life thinking this is just not going to get across the line, and when it does it feels really nice to be able to be here to support it, normalise it for people as well." Lifeblood estimates an additional 625,000 Australians may now be eligible to donate plasma. It is hoping for 24,000 new donors and 95,000 additional donations a year. The next step is for gay, bisexual and other members of the LGBTQI+ community to be able to donate what's known as "whole blood", not just plasma. The Therapeutic Goods Administration (TGA) has recently approved a gender-neutral risk assessment for blood and platelet donations, which is the first step in the process. This means everyone — regardless of gender or sexual orientation — will be asked if they have had sex (excluding oral sex) with a new or more than one partner in the past six months. If they answer yes, they will be asked whether this included having anal sex in the past three months. Anyone who answers yes will be deferred from donating blood for six months, but will be able to donate plasma. This means gay and bisexual men in long-term, monogamous relationships will be able to donate whole blood without abstaining from sex. This change will be implemented sometime next year, Adjunct Professor Cornelissen said. Let Us Give, a campaign to ensure equality when it comes to blood donation, welcomed the change to giving plasma but said the whole blood rules remain "discriminatory" as they stand currently. Spokesperson Rodney Croome said policy should centre on "the safety of a donor's sexual activity rather than the gender of their sexual partner". He said an approach change like this would "open up a new source of safe blood for those in need and remove discrimination from Australia's blood collection system". Those who have recently had sex with a partner known to have HIV or another blood-borne virus will still be unable to donate blood or plasma. There are also restrictions that prevent people taking some medications, those who have medical conditions such as MS or cancer, people who are pregnant or less than nine months postpartum, and those who have recently undergone surgery from making donations. The rule preventing people who lived in the UK between 1980 and 1996 from donating in Australia was lifted in July 2022.
News.com.au
14-07-2025
- Health
- News.com.au
Life-saving plasma donations to expand under national rule changes
Sexual activity rules that have prohibited thousands of Australians from donating blood have been lifted, smashing long-held stigmas and increasing much-needed plasma supplies. Ever since the AIDS crisis exploded into the public consciousness in the early 1980s, the Australian Red Cross has prevented gay and bisexual men, transgender people, sex workers and people taking pre-exposure prophylaxis (PREP) from donating blood. Decades later, the Red Cross Lifeblood Service reports 'some 625,000 Australians' will become eligible to donate plasma after the lifting of these rules. Lifeblood chief executive Stephen Cornelissen AM said the service was 'looking forward' to welcoming new donors into the fold. 'Importantly, today's (Monday's) change will allow those on PREP to become the first in the world to donate plasma without a wait period,' he said. 'Over the next 12 months, we estimate an extra 24,000 donors will give plasma, but we know people have been eagerly awaiting these changes and hope to far exceed these numbers.' Professor Cornelissen also took time to acknowledge the stigma that has accompanied blood donor ineligibility. 'While the rules were put in place to ensure a safe blood supply in the past, we know they have contributed to the stigma faced by many and hope today will be a turning point for Lifeblood and the LGBTQIA+ community and that people will feel welcome to come forward to donate their lifesaving plasma,' he said. Throughout the '80s and '90s, AIDS became highly stigmatised, and high-profile media campaigns such as the infamous 'Grim Reaper' AIDS campaign had detrimental impacts on the already marginalised LGBTQIA+ community – a residual trauma that many still vividly recall. On Monday, several gay men donated their plasma at the Lifeblood clinic in Sydney – some for the first time and others for the first time since they became ineligible in their youth. For Kane Wheatley, 44, a schoolteacher from Sydney's inner west, donating plasma always seemed just out of reach. 'I spent my whole life thinking that I couldn't get married – and then I was able to get married … and so donating blood or plasma … I thought it was never going to be an option – we were just never going to get there,' Mr Wheatley said. 'Today it just feels really great to be able to get across the line. To be one of the first people to do this and help normalise it and show people that we can do this … it's really flattering. 'I feel really honoured and really special to be able to do it.' Matt Higgs, 31, said he was a regular donor in his youth, but his sexuality eventually rendered him 'ineligible' – an experience that he called 'pretty common'. 'My partner is the same, he has a scar on his arm because he used to donate so regularly,' Mr Higgs said. 'I was healthy, but because I was in a relationship with a man, I couldn't donate.' Mr Higgs acknowledged the history of his ineligibility but said change was well overdue. '(Preventing gay men from donating blood) was a response that was maybe warranted at the time, but we've moved so far beyond the time of where that decision was made and so it's huge (for destigmatisation) for sure,' he said. 'It's a great feeling to be able to come back and give back … I know plenty of people that have needed blood products in their life and to be able to contribute to that is really cool.' Plasma is an essential component of more than a dozen medical treatments for illnesses like chickenpox, brain disorders, tetanus, measles, liver disease and haemophilia.
SBS Australia
14-07-2025
- Health
- SBS Australia
SBS News in Easy English 14 July 2025
Around 625,000 more Australians will now be able to donate plasma from today. Previous donor rules prevented many people from the LGBTIQ+ and sex worker communities from donating plasma if they had sex within the past three months. Lifeblood says the changes make Australia the first country in the world to remove all sexual activity-based restrictions on plasma donation. German backpacker Carolina Wilga is in a stable condition in hospital, after surviving eleven nights stranded in the Western Australian outback. The 26-year-old survived on minimal food and water and was exposed to freezing temperatures, before she flagged down a passing motorist on Friday afternoon. Premier Roger Cook says she is recovering at Fiona Stanley Hospital, and is in good spirits. "Extraordinary, extraordinary feat of surviving in the wilds. For 11 nights, she has to get over a very difficult physical ordeal. They threw every resource had it, and because of that, they were able to locate her van as quickly as possible." The EU and Indonesia have sealed a landmark free trade deal in Belgium. Indonesia and the EU have concluded a decade of negotiations for the agreement which is set to be formalised later this year. European Commission President Ursula von der Leyen says it marks a long-term commitment. "The European Commission has adopted a decision on a visa cascade. It means from now on Indonesian nationals visiting the European Union for a second time will be eligible for multi entry Schengen visa, this will make it easier to visit but also to invest, to study and to connect. In short, we are building a bridge between our societies." A national campaign has been launched to raise awareness of meningococcal disease, as the peak season for the illness gets underway. Meningococcal disease a bacterial infection which can progress rapidly, with some people becoming critically ill within 24 hours. There have been 56 cases reported nationally so far with this year. 18 of them were in New South Wales. Sotheby's is selling what it calls the largest piece of Mars ever found on earth. The 25 kilogram red, brown and grey chunk was found in Niger in November 2023. The auction house's vice chairman for science and natural history, Cassandra Hatton, says it is a very large piece. "It's more than double the size of what we previously thought was the largest piece of Mars. And we've only taken a small piece of it to study, to confirm that it was Martian, but there's all sorts of interesting data that can be found inside of this rock."In golf, Grace Kim has produced one of the most astonishing golfing fightbacks in history to join Australia's group of major champions." Kim recovered from four shots behind in a dramatic final round to clinch victory over world No.2 Jeeno Thitikul on the second playoff hole at the Evian Championship in France. She says she is feeling such a rollercoaster of emotions as it all sinks in.
