When Smithsonian Conservation Biology Institute conservation biologist Jessica Deichmann joined a project to determine how the construction of a road in Gabon’s Moukalaba-Doudou National Park […]

The post DNA untangles Gabon’s complex web of frog species appeared first on Smithsonian Insider.

Structural investigations of amorphous and nanocrystalline phases forming in solution are historically challenging. Few methods are capable of in situ atomic structural analysis and rigorous control of the system. A mixed-flow reactor (MFR) is used for total X-ray scattering experiments to examine the short- and long-range structure of phases in situ with pair distribution function (PDF) analysis. The adaptable experimental setup enables data collection for a range of different system chemistries, initial supersaturations and residence times. The age of the sample during analysis is controlled by adjusting the flow rate. Faster rates allow for younger samples to be examined, but if flow is too fast not enough data are acquired to average out excess signal noise. Slower flow rates form older samples, but at very slow speeds particles settle and block flow, clogging the system. Proper background collection and subtraction is critical for data optimization. Overall, this MFR method is an ideal scheme for analyzing the in situ structures of phases that form during crystal growth in solution. As a proof of concept, high-resolution total X-ray scattering data of amorphous and crystalline calcium phosphates and amorphous calcium carbonate were collected for PDF analysis.

Serial crystallography records still diffraction patterns from single, randomly oriented crystals, then merges data from hundreds or thousands of them to form a complete data set. To process the data, the diffraction patterns must first be indexed, equivalent to determining the orientation of each crystal. A novel automatic indexing algorithm is presented, which in tests usually gives significantly higher indexing rates than alternative programs currently available for this task. The algorithm does not require prior knowledge of the lattice parameters but can make use of that information if provided, and also allows indexing of diffraction patterns generated by several crystals in the beam. Cases with a small number of Bragg spots per pattern appear to particularly benefit from the new approach. The algorithm has been implemented and optimized for fast execution, making it suitable for real-time feedback during serial crystallography experiments. It is implemented in an open-source C++ library and distributed under the LGPLv3 licence. An interface to it has been added to the CrystFEL software suite.

Under the anomalous transmission condition in the Bragg mode, X-ray interference fringes were observed between two beams with different hyperbolic trajectories in a very weakly bent plane-parallel perfect crystal with negative strain gradient. The origin of the fringes was analysed based on the dynamical theory of diffraction for a distorted crystal. In the reflected beam from the entrance surface, the interference fringes were observed between once- and twice-reflected beams from the back surface. In the transmitted beam from the back surface, the interference fringes were observed between the direct beam and once-reflected beam from the entrance surface. In the emitted beam from the lateral surface, the interference fringes were observed between the beams after different numbers of reflections in the crystal. The multiply reflected beams were formed by a combined result of long propagation length along the beam direction with large divergence of the refracted beams when the strain gradient was negative. The period of these interference fringes was sensitive to very weak strain, of the order of 10−7.

This work studies the elastic scattering behavior of electron vortices when propagating through amorphous samples. A formulation of the multislice approach in cylindrical coordinates is used to theoretically investigate the redistribution of intensity between different angular momentum components due to scattering. To corroborate and elaborate on our theoretical results, extensive numerical simulations are performed on three model systems (Si3N4, Fe0.8B0.2, Pt) for a wide variety of experimental parameters to quantify the purity of the vortices, the net angular momentum transfer, and the variability of the results with respect to the random relative position between the electron beam and the scattering atoms. These results will help scientists to further improve the creation of electron vortices and enhance applications involving them.

Dr. JoGayle Howard of the Smithsonian's National Zoo discusses her work to breed and study one of the world's most endangered cats, the clouded leopard. More about the National Zoo's work to save clouded leopards: http://nationalzoo.si.edu/SCBI/ReproductiveScience/ConsEn...
http://nationalzoo.si.edu/support/annualappeal/cloudedleo... ... (more info)

The post Meet Our Scientist: Dr. JoGayle Howard of the Smithsonian’s National Zoological Park appeared first on Smithsonian Insider.

Here come the stinkbugs...With the cooler temperatures of fall the brown marmorated stinkbug begins a determined quest to find a warm place to spend the winter. Crowding around window screens and searching for other ways to get inside, homeowners in the United States will share their indoor living space this winter with millions of brown marmorated stinkbugs. In this video Gary Hevel, an entomolgist at the Smithsonian's National Museum of Natural History, shares some information about these interesting creatures, as well as some advice about how to deal with those that inevitably gain entry to your home.

The post Smithsonian entomologist Gary Hevel gives information and advice about stinkbugs in your home appeared first on Smithsonian Insider.

What's possibly the most calming yet nerve-racking job in the world? Come behind the scenes of the Smithsonian's Freer Gallery of Art to find out!

The post Zen and the art of fine art conservation: Behind the scenes in the Freer Gallery’s art conservation lab appeared first on Smithsonian Insider.

The post Creating a dictionary: Gabriela Pérez Báez, Curator of Linguistics appeared first on Smithsonian Insider.

A robotic male frog attracts a female tungara frog in a sound chamber at the Smithsonian Tropical Research Institute, Gamboa, Panama, in the summer 2013. […]

The post Robofrog fools female tungara frog appeared first on Smithsonian Insider.

On Monday, June 23, Asian elephants Swarna, Maharani and Kumala finished their 30-day quarantine and made their public debut at the Smithsonian’s National Zoo. This […]

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What’s an Asian small-clawed otter’s favorite enrichment toy? Anything it can get its paws on! This species’ dexterous, partially-webbed digits are adept at feeling for […]

The post Otterly engaging: Zoo enrichment appeared first on Smithsonian Insider.

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 Dana Tai Soon Burgess Dance Company @ Portrait Gallery appeared first on Smithsonian Insider.

One of the most important long-term projects to impact the video game industry is going on at the Smithsonian’s Lemelson Center for the Study of […]

The post Preserving the stories of Video Game Pioneers appeared first on Smithsonian Insider.

The post Reagan and Gorbachev’s Relationship Warmed Cold War Tensions appeared first on Smithsonian Insider.

From lunch counters to bus boycotts, the African American fight for integration and equality touched every aspect of life. What you may not be familiar […]

The post Protesting segregation at public pools appeared first on Smithsonian Insider.

A Projection Art Installation from the Smithsonian’s Freer Gallery of Art, “IlluminAsia Festival of Asian Art and Cultures” during the reopening celebration held in Oct. […]

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“Parallax Gap” transforms the Renwick Gallery’s Bettie Rubenstein Grand Salon into a visual puzzle. This immersive, site-specific installation explores examples of interplay between craft and […]

The post About the Renwick’s “Parallax Gap” appeared first on Smithsonian Insider.

A peek inside the gates at the Goodman Games late summer 2017. Held in the heart of Anacostia’s historic Barry Farm, the Goodman League hosts […]

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“Our guide celebrates the beauty of some of the most attractive inhabitants of Panama’s undersea realm and provides an indispensable, easy-to-use tool for their identification,” say the Littlers.

The post Researchers compile colorful on-line guide to marine algae of Panama appeared first on Smithsonian Insider.

An ancient new player has entered the debate over global warming and it is pink. Labrador fishermen call them “red rocks” because underwater they resemble […]

The post Ancient algal ‘tree rings’ show dramatic decline in Arctic and sub-Arctic sea ice appeared first on Smithsonian Insider.

One way to avoid a cold or the flu, doctors say, is to stay away from crowded places. Viruses spread fast in places where people […]

The post Sugar is key ingredient to evolutionary success of ants, researchers find appeared first on Smithsonian Insider.

In deer-populated forests, tastier plants can avoid being eaten if they are surrounded by less appealing plants. But with deer gone, diverse plots become weaker […]

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A 57-acre research plot at a University of Michigan forest preserve northwest of Ann Arbor has been added to a Smithsonian Institution global network used […]

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Scientific inspiration springs from many sources. In the case of Smithsonian botanist David Kenfack, ant bites were the inspiration for a recent paper he co-authored […]

The post Sweet life: tropical plants attract ants with sugary nectar appeared first on Smithsonian Insider.

For Smithsonian ornithologist Gary Graves it was a captivating spectacle. At an outdoor café in Kingston, Jamaica, Graves watched three mornings in a row as […]

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“When you can’t breathe, nothing else matters,” once a tagline of the American Lung Association, today it might easily describe what is happening in many […]

The post Gasping for air: nutrients, warming trigger ocean oxygen deficit appeared first on Smithsonian Insider.

During the course of a year, a western gorilla in the Lossi Forest of Northern Congo stuffs its face with a profusion of fruit, including figs, […]

The post Gorillas Aren’t Tricked By a Faux Sugary Fruit Thanks to a Mutation appeared first on Smithsonian Insider.

Spending time in a beautiful garden can be transformative. In fact, some visitors to the Smithsonian’s Mary Livingston Ripley Garden in Washington D.C. have taken […]

The post Monarch Butterflies Make the Most of the Smithsonian’s Gardens appeared first on Smithsonian Insider.

If you are a plant, when life aboveground turns harsh, you have few options. Some orchids respond by going dormant, spending years to decades underground […]

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Earth Day is coming up, and this year, the Smithsonian has a different take on it. It has invited more than 150 scientists, thought leaders, […]

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To catch lizards on the offshore islands close to St. Croix in the Caribbean, Smithsonian herpetologist Nicole Angeli uses a lasso of thread looped at […]

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The structural and nonlinear optical properties of a new anilinium hybrid crystal of chemical formula (C6H7NCl+·NO3−)3 have been investigated. The crystal structure was determined from single-crystal X-ray diffraction measurements performed at a temperature of 100 K which show that the compound crystallizes in a noncentrosymmetric space group (Pna21). The structural analysis was coupled with Hirshfeld surface analysis to evaluate the contribution of the different intermolecular interactions to the formation of supramolecular assemblies in the solid state that exhibit nonlinear optical features. This analysis reveals that the studied compound is characterized by a three-dimensional network of hydrogen bonds and the main contributions are provided by the O...H, C...H, H...H and Cl...H interactions, which alone represent ∼85% of the total contributions to the Hirshfeld surfaces. It is noteworthy that the halogen...H contributions are quite comparable with those of the H...H contacts. The nonlinear optical properties were investigated by nonlinear diffuse femtosecond-pulse reflectometry and the obtained results were compared with those of the reference material LiNbO3. The hybrid crystals exhibit notable second (SHG) and third (THG) harmonic generation which confirms its polarity is generated by the different intermolecular interactions. These measurements also highlight that the THG signal of the new anilinium compound normalized to its SHG counterpart is more pronounced than for LiNbO3.

An error in an equation in the paper by Song et al. [Acta Cryst. (2019), C75, 1353–1358] is corrected.

A screenshot from Maroon 5's "Sugar" music video.; Credit: Maroon 5

Maroon 5 has a new music video built around a simple, viral-bait premise: Adam Levine and the rest of the band trying to crash as many weddings around Los Angeles as they can in one day (Dec. 6 of last year). It's a lot of fun, directed by "Wedding Crashers" movie director David Dobkin, but it appears that some of those "crashed weddings" may have been staged.

Watch the video (warning: contains adult language):

Maroon 5: Sugar

Fans have noticed that several of the couples seen in the video appear to be actors. Actors Stephen and Barbara Woo posted on Facebook that they played the parents of one of the brides in the video and said that not only were the weddings staged, they didn't even take place on one day, claiming that all the weddings were shot in the same location over the course of three days.

Facebook post by actors

The groom from the wedding featured the most in the video has been named by observers as Nico Evers-Swindell, according to Cosmopolitan. Evers-Swindell was already married to actress Megan Ferguson since 2011 — and she's not the "bride" in the video.

Fans have fingered one of the models as "America's Next Top Model" runner-up Raina Hein, according to Cosmopolitan. Also, the man believed to be her long-term boyfriend isn't the groom in the Maroon 5 weddings.

Don't lose heart, though — at least one of the weddings in the video appears to be real, with wedding photographer Duke Khodaverdian telling E! that yes, it was the real deal.

"It was an incredible surprise and everyone at the wedding is going to cherish those memories," Khodaverdian told E! in December.

Instagram 1

Instagram 2

A representative for the band told "Entertainment Tonight" that only the grooms knew about the band in each case — but it looks like that means in the case of the real crashed weddings. The representative did concede that some shots "had to be shot separately from the real weddings due to time and space constraints that were given," and the article does note that the video was shot over three days.

Levine expressed his excitement about crashing the weddings in an interview with People magazine.

"I had no idea I would be affected by the overwhelming reactions we received from the couples and guests," Levine said. He told "Entertainment Tonight" that it was stressful to arrange, but that the surprise felt good. "[We were] happy that they liked our band, too – [that] would have been a total disaster."

They also solicited Twitter to find people lip-syncing "Sugar" to possibly put in their music video, but it doesn't look like those submissions got used.

Maroon 5 Sugar tweet

If you want to see Levine involved in a different dubious outfit, you can see him back hosting "The Voice" on Feb. 23. Open call auditions for the show begin Jan. 24 in New York, with Los Angeles auditions on Jan. 31 and Feb. 1.

Did you spot any more actors you recognize in this video? Do you have any more evidence of any of these weddings being either real or faked? Let me know on Twitter at @MikeRoe.

This content is from Southern California Public Radio. View the original story at SCPR.org.

A new type of X-ray LLL interferometer, a `hard' interferometer, which has both a base and a `ceiling', is tested for experimental investigations. The tested interferometer has no preliminary uncontrollable moiré and can be used for object and deformation investigations.

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