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Open-access and free articles in Acta Crystallographica Section F: Structural Biology and Crystallization Communications





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Camera traps & radio collars reveal hoarding strategies of the South American agouti

In a series of ongoing experiments on Barro Colorado Island in the Panama Canal, Kays and other researchers are using camera traps, radio collars and palm nuts with tracking transmitters attached to them to take a closer look at the nut-hoarding strategies of the agouti.

The post Camera traps & radio collars reveal hoarding strategies of the South American agouti appeared first on Smithsonian Insider.




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Rapid Response telescope system spots first potentially hazardous asteroid

The Panoramic Survey Telescope & Rapid Response System (Pan-STARRS) PS1 telescope has discovered an asteroid about 150 feet in diameter that will come within 4 million miles of Earth in mid-October.

The post Rapid Response telescope system spots first potentially hazardous asteroid appeared first on Smithsonian Insider.




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GPS and camera traps to replace radio antennas in tracking animals on Barro Colorado Island

On the Smithsonian Tropical Research Institute's Barro Colorado Island in the Panama Canal, staff members are taking down a network of seven tall Automated Radio Telemetry System towers used to track animals wearing radio-transmitters. Scientists on the island are switching to GPS and camera trap systems to produce more data with less infrastructure.

The post GPS and camera traps to replace radio antennas in tracking animals on Barro Colorado Island appeared first on Smithsonian Insider.




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Snowflake Study through Photomicrography, 1890

Snowflake Study through Photomicrography, 1890 Wilson A. Bentley became fascinated with the crystalline structure of individual snowflakes on his parent’s Vermont farm. By adapting a […]

The post Snowflake Study through Photomicrography, 1890 appeared first on Smithsonian Insider.





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Smithsonian astronomers and colleagues to photograph black hole at our galaxy’s heart

Smithsonian astronomers have joined their colleagues from other observatories in a daring new venture: to photograph the giant black hole at the heart of our Milky Way galaxy.

The post Smithsonian astronomers and colleagues to photograph black hole at our galaxy’s heart appeared first on Smithsonian Insider.




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Scientists discover sensory organ in baleen whales that choreographs movement of their massive jaws and throat-pouch

Scientists from the Smithsonian and University of British Columbia have discovered a sensory organ in the chin of rorqual whales that communicates to the brain. It orchestrates the dramatic adjustments needed in jaw position and throat-pouch expansion to make lunge feeding successful

The post Scientists discover sensory organ in baleen whales that choreographs movement of their massive jaws and throat-pouch appeared first on Smithsonian Insider.




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Dust trap around distant star may unlock mystery as to how planets form

Based on a treasure trove of recent discoveries, astronomers now know that planets are remarkably plentiful in our galaxy and may be common throughout the […]

The post Dust trap around distant star may unlock mystery as to how planets form appeared first on Smithsonian Insider.





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Scientists Find Andean Bears with Camera Traps In Peru

For the first time, a team from the Smithsonian Conservation Biology Institute’s (SCBI) Center for Conservation Education and Sustainability collected photo evidence of an Andean […]

The post Scientists Find Andean Bears with Camera Traps In Peru appeared first on Smithsonian Insider.




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Trapped in Amber: Ancient fossils reveal remarkable stability of Caribbean lizard communities

Tiny Anolis lizards preserved since the Miocene in amber are giving scientists a true appreciation of the meaning of community stability. Dating back some 15 […]

The post Trapped in Amber: Ancient fossils reveal remarkable stability of Caribbean lizard communities appeared first on Smithsonian Insider.




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Discovery: trap-jaw spiders snap prey with super-spidey speed and power

New high-speed videos of 14 species of tiny Mecysmaucheniid “trap-jaw” spiders have revealed that some species can snap their mouth parts shut at incredibly fast […]

The post Discovery: trap-jaw spiders snap prey with super-spidey speed and power appeared first on Smithsonian Insider.




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Macromolecular X-ray crystallography: soon to be a road less travelled?

The number of new X-ray crystallography-based submissions to the Protein Data Bank appears to be at the beginning of a decline, perhaps signalling an end to the era of the dominance of X-ray crystallography within structural biology. This letter, from the viewpoint of a young structural biologist, applies the Copernican method to the life expectancy of crystallography and asks whether the technique is still the mainstay of structural biology. A study of the rate of Protein Data Bank depositions allows a more nuanced analysis of the fortunes of macromolecular X-ray crystallography and shows that cryo-electron microscopy might now be outcompeting crystallography for new labour and talent, perhaps heralding a change in the landscape of the field.






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‘The Wrong Wrights’: A Graphic Novel from Smithsonian Books

In the first volume of the Secret Smithsonian Adventures graphic-novel series from Smithsonian Books, The Wrong Wrights, four middle-school kids visit the Smithsonian’s National Air […]

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En bloc TGN recruitment of Aspergillus TRAPPII reveals TRAPP maturation as unlikely to drive RAB1-to-RAB11 transition [RESEARCH ARTICLE]

M. Pinar and M. A. Penalva

TRAnsport Protein Particle (TRAPP) complexes regulate membrane traffic. TRAPPII and TRAPPIII share a core hetero-heptamer, also denoted TRAPPI. In fungi TRAPPIII and TRAPPII mediate GDP exchange on RAB1 and RAB11, respectively, regulating traffic across the Golgi, with TRAPPIII also activating RAB1 in autophagosomes. Our finding that Aspergillus nidulans TRAPPII can be assembled by addition of a TRAPPII-specific subcomplex onto core TRAPP prompted us to investigate the possibility that TRAPPI/TRAPPIII already residing in the Golgi matures into TRAPPII to determine a RAB1-to-RAB11 conversion as Golgi cisternae progress from early Golgi to TGN identity. By time-resolved microscopy we determine that the TRAPPII reporter Trs120/TRAPPC9 is recruited to existing TGN cisternae slightly before RAB11 arrives, and resides for~45 sec on them before cisternae tear off into RAB11 secretory carriers. Notably, the core TRAPP reporter Bet3/TRAPPC3 was not detectable in early Golgi cisternae, being instead recruited to TGN cisternae simultaneously with Trs120/TRAPPC9, indicating en bloc recruitment of TRAPPII to the Golgi and arguing strongly against the TRAPP maturation model.




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Glucocorticoids rapidly inhibit cell migration through a novel, non-transcriptional HDAC6 pathway [RESEARCH ARTICLE]

Stephen Kershaw, David J. Morgan, James Boyd, David G. Spiller, Gareth Kitchen, Egor Zindy, Mudassar Iqbal, Magnus Rattray, Chris M. Sanderson, Andrew Brass, Claus Jorgensen, Tracy Hussell, Laura C. Matthews, and David W. Ray

Glucocorticoids (GCs) act through the glucocorticoid receptor (GR) to regulate immunity, energy metabolism, and tissue repair. Upon ligand binding, activated GR mediates cellular effects by regulating gene expression, but some GR effects can occur rapidly without new transcription. We show GCs rapidly inhibit cell migration, in response to both GR agonist and antagonist ligand binding. The inhibitory effect on migration is prevented by GR knockdown with siRNA, confirming GR specificity, but not by actinomycin D treatment, suggesting a non-transcriptional mechanism. We identified a rapid onset increase in microtubule polymerisation following glucocorticoid treatment, identifying cytoskeletal stabilisation as the likely mechanism of action. HDAC6 overexpression, but not knockdown of αTAT1, rescued the GC effect, implicating HDAC6 as the GR effector. Consistent with this hypothesis, ligand-dependent cytoplasmic interaction between GR and HDAC6 was demonstrated by quantitative imaging. Taken together, we propose that activated GR inhibits HDAC6 function and thereby increases the stability of the microtubule network to reduce cell motility. We therefore report a novel, non-transcriptional mechanism whereby GCs impair cell motility through inhibition of HDAC6 and rapid reorganization of the cell architecture.




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Interview with Chip Clark, National Museum of Natural History photographer

Chip Clark came to the Smithsonian's National Museum of Natural History in 1973, with a degree in biology and an interest in photography. He has been a photographer on staff ever since, documenting thousands of specimens and exhibits, and accompanying scientists on research trips around the world. He died June 12, 2010. This video interview was made by Lauren Dare, an intern with the Smithsonian Institution Archives, on May 27, 2010, as part of an oral history project for the National Museum of Natural History's Centennial (2010-2011). To learn more about Chip Clark, see his page on the Centennial website-- www.mnh.si.edu/onehundredyears/profiles/Chip_Clark.html -- where you also can find more videos and stories about the people and the work of the NMNH.

The post Interview with Chip Clark, National Museum of Natural History photographer appeared first on Smithsonian Insider.




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Roland Kays, curator of mammals at the New York State Museum, discusses a new Smithsonian Website for sharing camera-trap images of wild animals

The post Roland Kays, curator of mammals at the New York State Museum, discusses a new Smithsonian Website for sharing camera-trap images of wild animals appeared first on Smithsonian Insider.





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Tremie Gregory uses camera traps to study “bridges” in the rainforest canopy

Maintaining natural movement of animals that live in the tropical rainforest canopy in South America is important for the health of the ecosystem. As development […]

The post Tremie Gregory uses camera traps to study “bridges” in the rainforest canopy appeared first on Smithsonian Insider.





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Meet Dana Tai Soon Burgess, Smithsonian Choreographer-in-residence

Known around the world for personal and culturally inspired choreography, Dana Tai Soon Burgess has been named the Smithsonian’s first choreographer-in-residence at the National Portrait […]

The post Meet Dana Tai Soon Burgess, Smithsonian Choreographer-in-residence appeared first on Smithsonian Insider.



  • Art
  • History & Culture
  • Video
  • National Portrait Gallery

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Remove the Searchpowerapp.com Search Redirect

If searches from a browser's address bar and possibly search engines are being redirected through the site https://searchpowerapp.com/, then you most likely have a browser extension or addon installed that is causing these redirects. Some extension will cause all of the searches from your browser's address bar to redirect through https://searchpowerapp.com/, which eventually redirects to Yahoo.com.

This article was published first at Remove the Searchpowerapp.com Search Redirect




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Video: Smithsonian horticulturalist Janet Draper discusses the pollination of the pelican flower

Flowers are usually associated with butterflies, but not the Dutchman’s Pipe (Aristolochia grandiflora). This deciduous vine, native to Brazil, has large flowers that emit an odor of decaying flesh, which attracts flies and beetles.

The post Video: Smithsonian horticulturalist Janet Draper discusses the pollination of the pelican flower appeared first on Smithsonian Insider.




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With 800 color photographs, new book takes a fascinating look inside palms

The chief appeal of The Anatomy of Palms is some 800 color photographs that document the extent of palm anatomical diversity.

The post With 800 color photographs, new book takes a fascinating look inside palms appeared first on Smithsonian Insider.




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The strange, controversial way plants trap CO2

Plants are among the world’s best carbon sinks, but there’s a side to the plant-CO2 love affair that’s rarely discussed. When carbon dioxide rises, plants […]

The post The strange, controversial way plants trap CO2 appeared first on Smithsonian Insider.




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Beetle and pollen trapped in 105 million-year-old amber reveal fourth major pollination mode in mid-Mesozoic

Named for Charles Darwin, the only known specimen of a newly discovered beetle, Darwinylus marcosi, died in a sticky battle in a gob of tree […]

The post Beetle and pollen trapped in 105 million-year-old amber reveal fourth major pollination mode in mid-Mesozoic appeared first on Smithsonian Insider.




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Crape myrtle trees aren’t native to the US, but hungry native birds still find them tasty

Each year from summer into fall, ornamental crape myrtle trees in the southern and central U.S. lay out a visual feast of vibrant flowers in […]

The post Crape myrtle trees aren’t native to the US, but hungry native birds still find them tasty appeared first on Smithsonian Insider.




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Forthcoming article in Acta Crystallographica Section E Crystallographic Communications




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Gjønnes Medal in Electron Crystallography – call for nominations




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Selling reduction versus Niggli reduction for crystallographic lattices

The unit-cell reduction described by Selling and used by Delone (whose early publications were under the spelling Delaunay) is explained in a simple form. The transformations needed to implement the reduction are listed. The simplicity of this reduction contrasts with the complexity of Niggli reduction.






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A simple graphical method to pinpoint local pseudosymmetries in Z' > 1 cases

An intuitive method is presented for detecting pseudosymmetries in Z' > 1 cases as a complement to well-proven strategies already available in the literature. It is based in the simple idea that the mid-points between equivalent atoms in symmetrically related mol­ecules are disposed according to simple well-known patterns, which are easily recognizable by optical inspection. A number of Z' = 4 cases in the literature are analyzed, which allows some of the potentialities of the method to be revealed.




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Crystallographic curiosities: polymorphism and structures with Z' > 1




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Open-access and free articles in Acta Crystallographica Section C: Crystal Structural Communications




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A Journey into Reciprocal Space: A Crystallographer's Perspective. By A. M. Glazer. Morgan & Claypool, 2017. Paperback, pp. 190. Price USD 55.00. ISBN 9781681746203.




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Direct recovery of interfacial topography from coherent X-ray reflectivity: model calculations for a one-dimensional interface

The inversion of X-ray reflectivity to reveal the topography of a one-dimensional interface is evaluated through model calculations.




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Forthcoming article in Acta Crystallographica Section A Foundations and Advances




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Could graphene-lined clothing prevent mosquito bites?

Full Text:

A new study shows that graphene sheets can block the signals mosquitoes use to identify a blood meal, potentially enabling a new chemical-free approach to mosquito bite prevention. Researchers showed that multilayer graphene can provide a twofold defense against mosquito bites. The ultra-thin yet strong material acts as a barrier that mosquitoes are unable to bite through. At the same time, experiments showed that graphene also blocks chemical signals mosquitoes use to sense that a blood meal is near, blunting their urge to bite in the first place. The findings suggest that clothing with a graphene lining could be an effective mosquito barrier.

Image credit: Hurt Lab/Brown University




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Horizon Therapeutics Shares Rise 15% on Strong Q1 Results and Raised F/Y Sales Guidance

Source: Streetwise Reports   05/06/2020

Shares of Horizon Therapeutics traded higher setting a new 52-week high price after the company reported a 27% y-o-y increase in net sales for Q1/20 and raised FY/20 net sales guidance.

Biopharmaceutical company Horizon Therapeutics Inc. (HZNP:NASDAQ), which focuses on developing and commercializing medicines for treatment of rare and rheumatic diseases, today announced its Q1/20 financial results for the period ending March 31, 2020. The firm began by advising that it is raising its FY/20 net sales guidance and revised its adjusted EBITDA guidance.

For Q1/20 the company reported that net sales increased by 27% to $355.9 million over Q1/19. The firm provided a breakdown of revenue by business unit and listed that in Q1/20 compared with Q1/19, its Orphan segment net sales increased 47% to $245.4 Million, KRYSTEXXA® net sales rose by 78% to $93.3 million and TEPEZZA (teprotumumab-trbw) net sales were $23.5 million, which exceeded expectations.

The firm advised that it is increasing FY/20 net sales guidance to $1.40-1.45 billion driven primarily by significantly higher TEPEZZA net sales and reflecting anticipated impacts from COVID-19. The company also presented revised FY/20 adjusted EBITDA guidance of $450-500 million, which reflects increased TEPEZZA program investment to support higher-than-expected demand.

The firm indicated that in Q1/20 it posted a GAAP net loss of $13.6 million with adjusted EBITDA of $107.2 million and non-GAAP net income of $83.2 million.

The company's Chairman, President and CEO Timothy Walbert commented, "We had a very strong start to 2020, highlighted by the early approval and rapid uptake of TEPEZZA, which significantly exceeded expectations, excellent KRYSTEXXA growth and our recent acquisition of HZN-825...We are increasing our full-year net sales guidance to account for significantly higher TEPEZZA net sales that more than offset the expected impact from COVID-19 this year, and we are widening both our net sales and adjusted EBITDA guidance ranges to account for future uncertainty. The fundamentals of our business are strong, including a robust cash position, and we continue to be very well positioned for the long term."

The company noted that it received FDA approval for TEPEZZA for the treatment of thyroid eye disease (TED) earlier this year in January. The firm described TED as "a rare, serious, progressive and vision-threatening autoimmune disease, and is associated with proptosis (eye bulging), diplopia (double vision), blurred vision, pain and facial disfigurement." The company further s explained that "TEPEZZA, a fully human monoclonal antibody insulin-like growth factor-1 receptor (IGF-1R) inhibitor, is the first and only FDA-approved medicine for the treatment of TED."

Horizon Therapeutics is a biopharmaceutical company headquartered in Dublin, Ireland. The firm researches, develops and commercializes medicines for treatment of rare and rheumatic diseases.

Horizon has a market capitalization of around $7.1 billion with approximately 190.2 million shares outstanding and a short interest of about 4.9%. HZNP shares opened 10% higher today at $44.19 (+$3.81, +10.19%) over yesterday's $37.38 closing price and reached a new 52-week high price this morning of $43.57. The stock has traded today between $40.00 and $43.90 per share and is currently trading at $42.95 (+$5.57, +14.90%).

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New Rapyd report on disbursement reveals how consumers across Asia prefer to be paid

The 2020 State of Disbursements: APAC Outlook Report by Rapyd...




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HP PC freezes when segmented graphics are used




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UI/UX and Visual or Graphic Design Related Support - Feature request




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No Single Solution for Protecting Kids From Internet Pornography

No single approach -- technical, legal, economic, or educational -- will be sufficient to protect children from online pornography.




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The Polygraph and Lie Detection

Good morning. On behalf of the National Academies and my colleagues on the committee, I welcome those of you in the room as well as those listening to the live audio webcast.