Bacteria may be harbingers of invisible damage in concrete

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Concrete evidence

  • Bacteria may be harbingers of invisible damage in concrete

News releaseAugust 31, 2015  • By Diane Kukich

Photos by Evan Krape

 

Julia Maresca (left) and Keira Zhang are conducting research aimed at identifying bacteria that can serve as an early damage-detection system in concrete.

Julia Maresca (left) and Keira Zhang are conducting research aimed at identifying bacteria that can serve as an early damage-detection system in concrete.

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Tail as old as time

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New research from UAlberta grad Victoria Arbour suggests that tails of some ankylosaurs evolved from flexible to stiff to support mace-like tail clubs.

News release August 31, 2015 University of Alberta

Ziapelta, an ankylosaur with a fully developed tail club. (Illustration: Sydney Mohr)

Ziapelta, an ankylosaur with a fully developed tail club. (Illustration: Sydney Mohr)

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Unraveling the history of galaxies

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Cardiff University experts provide first direct evidence of galaxy ‘metamorphosis’

News release August 27, 2015 Cardiff University

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A team of international scientists, led by astronomers from the School of Physics and Astronomy, has shown for the first time that galaxies can change their structure over the course of their lifetime.

By observing the sky as it is today, and peering back in time using the Hubble and Herschel telescopes, the team have shown that a large proportion of galaxies have undergone a major ‘metamorphosis’ since they were initially formed after the Big Bang.

By providing the first direct evidence of the extent of this transformation, the team hope to shed light on the processes that caused these dramatic changes, and therefore gain a greater understanding of the appearance and properties of the Universe as we know it today.

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‘Brainbow’ tagging research reveals surprising data about visual connections in brain

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ROANOKE, Va., Aug. 31, 2015 – Neuroscientists know that some connections in the brain are pruned through neural development. Function gives rise to structure, according to the textbooks. But scientists at the Virginia Tech Carilion Research Institute have discovered that the textbooks might be wrong.

News release August 31, 2015 By Ashley WennersHerron

 

Scientists used an imaging technique called “brainbow” to tag visual circuitry cells in the brain. They expected one color to dominate, but several distinct colors appeared.

Scientists used an imaging technique called “brainbow” to tag visual circuitry cells in the brain. They expected one color to dominate, but several distinct colors appeared.

 

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World’s Most Powerful Digital Camera Sees Construction Green Light

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The Large Synoptic Survey Telescope’s ‘Eye’ Will be Built at SLAC

 

Press releaseAugust 31, 2015 • By Andrew Gordon

 

Menlo Park, Calif. — The Department of Energy has approved the start of construction for a 3.2-gigapixel digital camera – the world’s largest – at the heart of the Large Synoptic Survey Telescope (LSST).  Assembled at the DOE’s SLAC National Accelerator Laboratory, the camera will be the eye of LSST, revealing unprecedented details of the universe and helping unravel some of its greatest mysteries.

The LSST’s camera will include a filter-changing mechanism and shutter. This animation shows that mechanism at work, which allows the camera to view different wavelengths; the camera is capable of viewing light from near-ultraviolet to near-infrared (0.3-1 μm) wavelengths. (SLAC National Accelerator Laboratory)

The LSST’s camera will include a filter-changing mechanism and shutter. This animation shows that mechanism at work, which allows the camera to view different wavelengths; the camera is capable of viewing light from near-ultraviolet to near-infrared (0.3-1 μm) wavelengths. (SLAC National Accelerator Laboratory)

 

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Ο οίκος των Αργεαδών ή Τημενιδών

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Όσον αφορά στην χρονική περίοδο ίδρυσης του βασιλικού Οίκου της Μακεδονίας τίποτα δεν είναι απόλυτα σαφές. Η αρχή τοποθετείται μεταξύ μύθου και ιστορίας, ο δε ιδρυτής της φέρεται να έζησε την ίδια περίπου εποχή με τον ιδρυτή του Οίκου των Αχαιμενιδών. Αυτή η σύμπτωση γίνεται ακόμη πιο ενδιαφέρουσα, αφού τον 6ο π.Χ. αιώνα ο Δαρείος Α’ πέρασε στην Ευρώπη και κατέστησε τον Αμύντα Α’ υποτελή του, εγκαινιάζοντας μία αντιπαλότητα μοιραία και για τους δύο Οίκους. Δύο αιώνες αργότερα ο Αλέξανδρος Γ΄ πέρασε στην Ασία και εκστράτευσε κατά της Αχαιμενιδικής αυτοκρατορίας. Τον τέταρτο χρόνο των εχθροπραξιών δολοφονήθηκε ο Δαρείος Γ΄, τον ενδέκατο χρόνο πέθανε ο Αλέξανδρος Γ΄ και μαζί τους πέθαναν και οι δύο βασιλικοί Οίκοι. Συνέχεια ανάγνωσης

Rare red-coloured mouse spider

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A rare fully red mouse spider has been found in north-western Sydney, after a huge infestation

News release August 24, 2015  By Nick Volpe

A rare red mouse spider, (Missulena bradleyi). Image Credit: (c) Nick Volpe

A rare red mouse spider, (Missulena bradleyi). Image Credit: (c) Nick Volpe

Young wildlife photographer Nick Volpe has photographed a very rare red-coloured mouse spider, in north-western Sydney.

He says: «In the middle of suburbia alongside a busy road in Girraween, Sydney, lies a small 10-by-10m squared patch of grass in a front yard that has an infestation of the venomous eastern mouse spider (Missulena bradleyi).

The small, chunky, glossy black spiders with large fangs spend the majority of their lives underground in burrows, and only emerge to wander during the Autumn rains in search of a mate.

The property owner has recorded every specimen he has captured between late April to June every year since 2011 to 2015. In that time he has collected an astounding 960 spiders, of which he gave to private collectors and pet shops.

These infestations are so severe that up to 87 spiders have been collected in a single night. However, some very interesting and unique specimens were found among the spider hoards. In the five years of observations, the property owner has found six bright red specimens, very different to the average black spiders.

It’s likely these extremely rare spiders are expressing a genetic mutation that results in their body colouring being a stunning bright red.

A close cousin of the mouse spider, funnel-web spiders can also express variations of the red pigment.


 

 

 

Research may solve lunar fire fountain mystery

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Washington, DC— Tiny beads of volcanic glass found on the lunar surface during the Apollo missions are a sign that fire fountain eruptions took place on the Moon’s surface. Now, scientists from Brown University and the Carnegie Institution for Science have identified the volatile gas that drove those eruptions.

Research news August 24, 2015 Carnegie Science

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Joining molecular components expands ability to manipulate genes in specific cell types

News release August 19, 2015 By Stephanie Dutchen

 

Want to see where a particular gene is active? Use green fluorescent protein, or GFP, and the cells will light up. Want to turn that gene on or off in an organism? You might use an enzyme called Cre recombinase. Want to turn a gene on or off only in one cell type? That’s tough. But the job just got a lot easier: Harvard Medical School researchers have found a way to combine GFP and Cre.

GFP-expressing Purkinje cells in the brain turn red when Cre-DOG activates. Image: Stephanie Rudolph

GFP-expressing Purkinje cells in the brain turn red when Cre-DOG activates. Image: Stephanie Rudolph

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CSIRO calls on researchers worldwide to join forces to save honey bees

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Honey bees are essential for the pollination of about one third of the food we eat – including fruit, vegetables, oils, seeds and nuts – yet their health and ability to pollinate our crops is under serious threat.

News release August 25, 2015 CSIRO

 

To help tackle this worldwide problem, CSIRO is leading the Global Initiative for Honey bee Health – an international collaboration of researchers, beekeepers, farmers, industry, and technology companies aimed at better understanding what is harming bees and finding solutions to help secure crop pollination.

The Varroa mite, seen here latched onto a bee pupae, is the most significant pest to honeybees around the world. © CSIRO

The Varroa mite, seen here latched onto a bee pupae, is the most significant pest to honeybees around the world.
© CSIRO

 

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