Colorado potato beetles can regrow muscles on demand: Western researchers – BlackburnNews.com
Colorado potato beetles can regrow muscles on demand: Western researchers
July 23, 2022 7:15am
Western University researchers have discovered the Colorado potato beetle has a unique ability that allows it to preserve energy during winter hibernation.
The little bug can break down and regrow its muscles on demand, according to the team of insect physiologists.
The discovery was a bit of a happy-accident. The scientists were trying to measure the beetle’s metabolic rate of its mitochondria – membrane-bound cell organelles that supply energy for flight and metabolism – when they determined it had none.
“We know that lots of animals try to save energy and reduce their metabolic rate in the winter by turning down their mitochondria,” Western professor and study lead Brent Sinclair said. “So it seemed like a simple experiment to show that the low metabolic rates we measure in these overwintering beetles were associated with a change in the way the mitochondria function.”
Former graduate student Jackie Lebenzon was tasked with taking the measurement and at first believed the lack of mitochondria was due to an equipment failure in the lab.
“We thought maybe the instrument wasn’t working, or my sampling was damaging the mitochondria, but eventually, I used an electron microscope to look at the muscle cells and found that almost all of the mitochondria were gone. Completely gone,” said Lebenzon.
But when researchers reexamined the same beetles at the end of winter they found all of the mitochondria were back.
“This ability to simply regrow an entire muscle’s worth of mitochondria is completely novel, and explains how beetles are able to save energy all winter, yet be ready to fly and mate immediately in the spring,” said Lebenzon.
More research is needed to determine whether all hibernating insects use this energy-saving strategy. However, the discovery does have immediate implications for understanding mitochondria regulation in insects, which could potentially be manipulated to help treat people suffering from some muscular diseases.
The study was published in the high-impact journal PNAS.
Joint NASA, CNES Water-Tracking Satellite Reveals First Stunning Views – Space Ref
The Surface Water and Ocean Topography mission offers the first taste of the detailed perspectives of Earth’s surface water that its cutting-edge instruments will be able to capture.
The international Surface Water and Ocean Topography (SWOT) mission – led by NASA and the French space agency Centre National d’Études Spatiales (CNES) – has sent back some of its first glimpses of water on the planet’s surface, showing ocean currents like the Gulf Stream in unprecedented detail. SWOT is also capturing views of freshwater features such as lakes, rivers, and other water bodies down to about 300 feet (100 meters) wide.
The satellite will measure the elevation of nearly all the water on Earth’s surface and provide one of the most comprehensive surveys yet of our planet’s surface water. SWOT’s measurements of freshwater bodies and the ocean will provide insights into how the ocean influences climate change and the water cycle; how a warming world affects water storage in lakes, rivers, and reservoirs; and how communities can better manage their water resources and prepare for floods and other disasters.
“SWOT’s advanced imagery will empower researchers and advance the way we manage fresh water and the effects of sea level rise across the globe,” said NASA Administrator Bill Nelson. “Water is one of our planet’s most important resources – and it’s proven to be vulnerable to the impacts of climate change. SWOT will provide critical information that communities can use to prepare for the impacts of a warming climate.”
A Whole New View
As seen in these early images, on Jan. 21, 2023, SWOT measured sea level in a part of the Gulf Stream off the coast of North Carolina and Virginia. The two antennas of SWOT’s Ka-band Radar Interferometer (KaRIn) instrument acquired data that was mapped as a pair of wide, colored strips spanning a total of 75 miles (120 kilometers) across. Red and orange areas in the images represent sea levels that are higher than the global average, while the shades of blue represent sea levels that are lower than average.
For comparison, the new data is shown alongside sea surface height data taken by space-based instruments called altimeters. The instruments – widely used to measure sea level – also bounce radar signals off of Earth’s surface to collect their measurements. But traditional altimeters are able to look only at a narrow beam of Earth directly beneath them, unlike KaRIn’s two wide-swath strips that observe sea level as a two-dimensional map.
The spatial resolution of SWOT ocean measurements is 10 times greater than the composite of sea surface height data gathered over the same area by seven other satellites: Sentinel-6 Michael Freilich, Jason-3, Sentinel-3A and 3B, Cryosat-2, Altika, and Hai Yang 2B. The composite image was created using information from the Copernicus Marine Service of ESA (European Space Agency) and shows the same day as the SWOT data.
KaRIn also measured the elevation of water features on Long Island – shown as bright pink splotches nestled within the landscape. (Purple, yellow, green, and blue shades represent different land elevations.)
“Our ability to measure freshwater resources on a global scale through satellite data is of prime importance as we seek to adjust to a changing climate,” said CNES Chairman and CEO Philippe Baptiste. “In this respect, the first views from SWOT give us a clearer picture than ever before. These data will prove highly valuable for the international scientific community in the fields of hydrology, oceanography, and coastal studies.”
This initial inland image is a tantalizing indication of how SWOT can measure details of smaller lakes, ponds, and rivers in ways that satellites could not before. Such data will be used to produce an extraordinary accounting of the freshwater on Earth’s surface in ways useful to researchers, policymakers, and water resource managers.
“The KaRIn instrument took years to develop and build, and it will collect information on bodies of water across the globe – data that will be freely and openly available to everybody who needs it,” said Parag Vaze, SWOT project manager at NASA’s Jet Propulsion Laboratory in Southern California.
More About the Mission
Launched on Dec. 16, 2022, from Vandenberg Space Force Base in central California, SWOT is now in a period of commissioning, calibration, and validation. Engineers are checking out the performance of the satellite’s systems and science instruments before the planned start of science operations in summer 2023.
The data for these first images was collected by SWOT’s KaRIn instrument, the scientific heart of the satellite. KaRIn has one antenna at each end of a boom that’s 33 feet (10 meters) long. This enables the instrument to look off to either side of a center line directly below the satellite as it bounces microwave signals off Earth’s surface. The returning radar signals arrive at each antenna slightly out of sync, or phase, from one another. When these signals are combined with other information about the antennas and the satellite’s altitude, scientists will be able to map the height of water on Earth’s surface with never-before-seen clarity. KaRIn encountered an issue earlier this year with one of its subsystems; engineers have now resolved the situation, and the instrument is up and running.
SWOT was jointly developed by NASA and CNES, with contributions from the Canadian Space Agency (CSA) and the UK Space Agency. JPL, which is managed for NASA by Caltech in Pasadena, California, leads the U.S. component of the project. For the flight system payload, NASA provided the KaRIn instrument, a GPS science receiver, a laser retroreflector, a two-beam microwave radiometer, and NASA instrument operations. CNES provided the Doppler Orbitography and Radioposition Integrated by Satellite (DORIS) system, the dual frequency Poseidon altimeter (developed by Thales Alenia Space), the KaRIn radio-frequency subsystem (together with Thales Alenia Space and with support from the UK Space Agency), the satellite platform, and ground operations. CSA provided the KaRIn high-power transmitter assembly. NASA provided the launch vehicle and the agency’s Launch Services Program, based at Kennedy Space Center, managed the associated launch services.
To learn more about SWOT, visit: https://swot.jpl.nasa.gov/
Severe solar storm hits Earth, strongest in past 6 years – Indiatimes.com
The Earth witnessed a powerful solar storm in nearly six years, causing auroras all over the US, the National Oceanic and Atmospheric Administration (NOAA) said. NOAA had earlier announced moderate G2 storm and G3 conditions between March 23 and 25, but updated it to G4. A severe G4 storm can affect the power grid system with possible widespread voltage control problems; and spacecraft operations with increased possibility of surface charging, and atmospheric drag risk on Low Earth Orbiting (LEO) satellites.
Parade of five planets on display in B.C. skies Tuesday evening
Five of the sun’s eight major planets will be lined up on the western horizon this Tuesday just after sunset.
The astronomical delight will comprise Mercury, Venus, Mars, Jupiter and Uranus — all in a visible line from the horizon to the crescent moon.
NASA astronomer Bill Cooke says the best way to get a glimpse is to stand somewhere with a clear view of the western horizon.
The planets will stretch from the horizon to halfway up the night sky.
Mercury and Jupiter (the first and fifth planets from the sun) will dip below the horizon around 30 minutes after sunset, that is 7:37 p.m. on Tuesday.
The five-planet spread can be seen anywhere on Earth.
Venus, Mars and Jupiter will be the brightest, particularly Venus, and Mars will be closest to the moon. Mercury and Uranus will be the dimmest, so a set of binoculars will be useful.
Uranus is the rarest seen of the planetary lineup.
Judge Ron DeSantis By His Actions – The Atlantic
How Trump's indictment interlude has changed America's political landscape – The Globe and Mail
Absolutely BROKEN Necromancer Gameplay – Diablo 4 Beta – IGN
Silver investment demand jumped 12% in 2019
Iran anticipates renewed protests amid social media shutdown
Search for life on Mars accelerates as new bodies of water found below planet’s surface
Investment15 hours ago
First Republic Bank Stock: Why I Am Sticking To My Investment (NYSE:FRC)
Investment16 hours ago
The A.I. boom could also give a boost to these investing trends. How to play it
News23 hours ago
Biden visit: Trump calls Canada-U.S. deals ‘horrible’
Sports22 hours ago
Despite 17 birdies, Rory McIlroy needs two trips to ‘friendly’ No. 18
News18 hours ago
Canada is set for its largest alcohol tax increase yet. Here’s what to know
Business15 hours ago
Thousands without power after Ontario windstorm
Health18 hours ago
HPHA to close COVID, cold and flu clinics
Media15 hours ago
Utah is first US state to limit teen social media access