Bruce Campbell, of the Center for Earth and Planetary Studies at the Smithsonian's National Air and Space Museum, is at the National Radio Astronomy Observatory in Green Bank, W. Va., to make a radar map of the Moon.
The post Smithsonian geophysicist Bruce Campbell explains his work of making a detailed radar map of the Moon appeared first on Smithsonian Insider.
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.
Join National Zoo Conservation Biologist Brian Gratwicke in his work to save Panama's amphibians from extinction. You can also catch up on his dispatches from the field on the Panamanian Amphibian Rescue and Conservation Project's blog: http://amphibianrescue.org/
The post Meet our Scientist: Brian Gratwicke, Amphibian Avenger appeared first on Smithsonian Insider.
On June 7 the Sun unleashed an spectacular solar flare with a substantial coronal mass ejection. A large cloud of plasma mushroomed up, and while some parts fell back into the Sun, most rushed off into space. The first two segments of this video are seen through the Atmospheric Imaging Assembly aboard NASA's Solar Dynamics Observatory. The AIA was developed by Smithsonian scientists.
The post Spectacular June 7 solar flare seen through the Atmospheric Imaging Assembly aboard Solar Dynamics Observatory appeared first on Smithsonian Insider.
A short history of the Harvard-Smithsonian Center for Astrophysics
The post Lighthouse of the skies, the Harvard-Smithsonian Center for Astrophysics appeared first on Smithsonian Insider.
Jonathan Coddington, Curator of Spiders at the Smithsonian National Museum of Natural History describes how photography has transformed the study of arachnids.
The post How photography has transformed the study of spiders and their webs appeared first on Smithsonian Insider.
Smithsonian planetary geologists Sharon Purdy and Maria Banks explain how you can take your very own photo of Mars.
The post Scientists Maria Banks and Sharon Purdy explain how to take your own photo of Mars. appeared first on Smithsonian Insider.
Using an innovative new camera on board a sounding rocket, an international team of scientists have captured the sharpest images yet of the Sun’s outer […]
The post Camera captures sun’s atmospheric sparkles appeared first on Smithsonian Insider.
Joseph Henry was one of America’s preeminent 19th-century scientists, a pioneer in the investigation of electromagnetism and other fields of study, and the first Secretary […]
The post Joseph Henry: Champion of American Science appeared first on Smithsonian Insider.
Learn how to use the Smithsonian Wild website to find amazing camera trap photos of mammals from around the world
The post Learn to use the Smithsonian Wild website of amazing animal photos! appeared first on Smithsonian Insider.
The National Air and Space Museum’s 2014 Trophy Award Winner for Current Achievement goes to the Dawn Flight Team. The Dawn team has successfully performed […]
The post The Dawn Flight Team – 2014 NASM Trophy Winner 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 […]
The post Asian elephant journey: Calgary to National Zoo appeared first on Smithsonian Insider.
The Smithsonian Conservation Biology Institute and the Smithsonian Tropical Research Institute are working together as part of the Panama Amphibian Rescue and Conservation Project have […]
The post New Amphibian Rescue Lab in Panama appeared first on Smithsonian Insider.
Click here to read more about the work of the Laser Interferometer Gravitational-Wave Observatory. The Smithsonian has been celebrating innovation in American culture for more than […]
The post Stephen Hawking Congratulates LIGO Team on its Smithsonian American Ingenuity Award 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 Meet Dana Tai Soon Burgess, Smithsonian Choreographer-in-residence appeared first on Smithsonian Insider.
Asian elephants are critically endangered and their habitat in the wild is rapidly disappearing, but Smithsonian Conservation Biology Institute scientists are working to make sure […]
The post Earth Optimism: Elephants appeared first on Smithsonian Insider.
Aymar Ccopacatty (Aymara), NMAI Artist Leadership Program (ALP) participant, tells his personal story of the environmental impact on Puno, Peru, of all-too-commonly discarded commercial plastic […]
The post Knitting plastic Wiphalas in Peru appeared first on Smithsonian Insider.
Scientists at the Smithsonian Conservation Biology Institute (SCBI) have found that poaching is an emerging crisis for Asian elephants in Myanmar. Researchers first became aware […]
The post Elephant poaching crisis in Myanmar appeared first on Smithsonian Insider.
Smithsonian plant physiologist Bert Drake has studied one wetland's response to climate change for more than two decades. He gives a tour of the field experiment and explains some of the findings.
The post On the Chesapeake Bay, Smithsonian plant physiologist Bert Drake has been studying one wetland’s response to climate change for more than two decades. appeared first on Smithsonian Insider.
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.
Despite many laws to protect it, a new survey reveals wild ginseng in Maryland is on the decline.
The post Wild ginseng in steep decline in Maryland, survey reveals: Q&A with Smithsonian botanist Christopher Puttock appeared first on Smithsonian Insider.
Strategically placed honeybee hives can deter African elephants from raiding crops, but the hives must be actively managed by beekeepers to work, according to a […]
The post Study: Managed beehives can discourage crop-raiding elephants appeared first on Smithsonian Insider.
The cationic cyclometallated iridium(III) complex [Ir(C9H7N2)2(C12H8N2)](PF6) has been synthesized and crystallized by the inter-diffusion method. It contains an unknown number of solvent molecules and has a different space-group symmetry (C2/c) structure than its solvatomorph (P21/c).
The asymmetric unit of the title compound contains two independent molecules, consisting of perimidine and phenol units, which are linked through an N—H⋯O hydrogen bond. Intramolecular O—H⋯N hydrogen bonds are observed in both independent molecules.
The title compound, 1-(2,5-dimethoxyphenyl)-2,2,6,6-tetramethylpiperidine, was synthesized as a side-product during the synthesis of the intermediate, methyl 3,6-dimethoxy-2-(2-methoxy-2-oxoethyl)benzoate, necessary for the total synthesis of the isocoumarin 5,8-dimethoxy-3-methyl-1H-isochromen-1-one.
The dihedral angle between the two aromatic rings of the title compound is 64.12 (14)°. The crystal structure is stabilized by a short Cl⋯H contact, C—Cl⋯π and van der Waals interactions.
The title complex, Cu(L)2 or [Cu(C15HF10O2)2], comprising one copper ion and two fully fluorinated ligands (L−), was crystallized with 3,4-ethylenedioxythiophene (EDOT, C6H6O2S) as a guest molecule to give in a dichloromethane solution a unique co-crystal, Cu(L)2·3C6H6O2S.
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.
A new aspherical scattering factor formalism has been implemented in the crystallographic least-squares refinement program SHELXL. The formalism relies on Gaussian functions and can optionally complement the independent atom model to take into account the deformation of electron-density distribution due to chemical bonding and lone pairs. Asphericity contributions were derived from the electron density obtained from quantum-chemical density functional theory computations of suitable model compounds that contain particular chemical environments, as defined by the invariom formalism. Thanks to a new algorithm, invariom assignment for refinement in SHELXL is automated. A suitable parameterization for each chemical environment within the new model was achieved by metaheuristics. Figures of merit, precision and accuracy of crystallographic least-squares refinements improve significantly upon using the new model.
To date X-ray protein crystallography is the most successful technique available for the determination of high-resolution 3D structures of biological molecules and their complexes. In X-ray protein crystallography the structure of a protein is refined against the set of observed Bragg reflections from a protein crystal. The resolution of the refined protein structure is limited by the highest angle at which Bragg reflections can be observed. In addition, the Bragg reflections alone are typically insufficient (by a factor of two) to determine the structure ab initio, and so prior information is required. Crystals formed from an imperfect packing of the protein molecules may also exhibit continuous diffraction between and beyond these Bragg reflections. When this is due to random displacements of the molecules from each crystal lattice site, the continuous diffraction provides the necessary information to determine the protein structure without prior knowledge, to a resolution that is not limited by the angular extent of the observed Bragg reflections but instead by that of the diffraction as a whole. This article presents an iterative projection algorithm that simultaneously uses the continuous diffraction as well as the Bragg reflections for the determination of protein structures. The viability of this method is demonstrated on simulated crystal diffraction.