Tetragonal YxOs4B4 (x = 1.161) is an incommensurate composite of columns of Y atoms in a three-dimensional Os4B4 framework. The structure was refined using the superspace approach.

YxOs4B4 (x = 1.161) crystallizes as a tetragonal incommensurate composite of columns of Y atoms extending along [001] in an Os4B4 framework. The structure was refined using the superspace approach. The basic structure of the Y subsystem can be idealized as having I4/mmm symmetry, with a crystallographically unique Y atom located on the 4/mmm position. The actual superspace symmetry is P42/nmc(00σ3)s0s0. The Y atoms feature only subtle positional modulation in the [001] direction. The Os4B4 subsystem [P42/ncm(00σ3)00ss superspace symmetry] is built of columns of edge-sharing Os4 tetrahedra extending along [001] and B2 dumbbells. The Os4 tetrahedra feature pronounced positional modulation with a distinct variation of the Os—Os bond lengths. Modulation of the B2 dumbbells is best described as a rotation about the [001] axis.

The structural and chemical evolution of battery electrodes at the nanoscale plays an important role in affecting the cell performance. Nano-resolution X-ray microscopy has been demonstrated as a powerful technique for characterizing the evolution of battery electrodes under operating conditions with sensitivity to their morphology, compositional distribution and redox heterogeneity. In real-world batteries, the electrode could deform upon battery operation, causing challenges for the image registration which is necessary for several experimental modalities, e.g. XANES imaging. To address this challenge, this work develops a deep-learning-based method for automatic particle identification and tracking. This approach was not only able to facilitate image registration with good robustness but also allowed quantification of the degree of sample deformation. The effectiveness of the method was first demonstrated using synthetic datasets with known ground truth. The method was then applied to an experimental dataset collected on an operating lithium battery cell, revealing a high degree of intra- and interparticle chemical complexity in operating batteries.

The paper considers the possibility of using the diamond-silicon carbide composite Skeleton® with a technological coating of polycrystalline silicon as a substrate for X-ray mirrors used with powerful synchrotron radiation sources (third+ and fourth generation). Samples were studied after polishing to provide the following surface parameters: root-mean-square flatness ≃ 50 nm, micro-roughness on the frame 2 µm × 2 µm σ ≃ 0.15 nm. The heat capacity, thermal conductivity and coefficient of linear thermal expansion were investigated. For comparison, a monocrystalline silicon sample was studied under the same conditions using the same methods. The value of the coefficient of linear thermal expansion turned out to be higher than that of monocrystalline silicon and amounted to 4.3 × 10−6 K−1, and the values of thermal conductivity (5.0 W cm−1 K−1) and heat capacity (1.2 J K−1 g−1) also exceeded the values for Si. Thermally induced deformations of both Skeleton® and monocrystalline silicon samples under irradiation with a CO2 laser beam have also been experimentally studied. Taking into account the obtained thermophysical constants, the calculation of thermally induced deformation under irradiation with hard (20 keV) X-rays showed almost three times less deformation of the Skeleton® sample than of the monocrystalline silicon sample.

In the folded state, biomolecules exchange between multiple conformational states crucial for their function. However, most structural models derived from experiments and computational predictions only encode a single state. To represent biomolecules accurately, we must move towards modeling and predicting structural ensembles. Information about structural ensembles exists within experimental data from X-ray crystallography and cryo-electron microscopy. Although new tools are available to detect conformational and compositional heterogeneity within these ensembles, the legacy PDB data structure does not robustly encapsulate this complexity. We propose modifications to the macromolecular crystallographic information file (mmCIF) to improve the representation and interrelation of conformational and compositional heterogeneity. These modifications will enable the capture of macromolecular ensembles in a human and machine-interpretable way, potentially catalyzing breakthroughs for ensemble–function predictions, analogous to the achievements of AlphaFold with single-structure prediction.

MltG, a membrane-bound lytic transglycosyl­ase, has roles in terminating glycan polymerization in peptidoglycan and incorporating glycan chains into the cell wall, making it significant in bacterial cell-wall biosynthesis and remodeling. This study provides the first reported MltG structure from Mycobacterium abscessus (maMltG), a superbug that has high antibiotic resistance. Our structural and biochemical analyses revealed that MltG has a flexible peptidoglycan-binding domain and exists as a monomer in solution. Further, the putative active site of maMltG was disclosed using structural analysis and sequence comparison. Overall, this study contributes to our understanding of the transglycosyl­ation reaction of the MltG family, aiding the design of next-generation antibiotics targeting M. abscessus.

SnGe4N4O4 was synthesized at high pressure (16 and 20 GPa) and high temperature (1200 and 1500°C) in a large-volume press. Powder X-ray diffraction experiments using synchrotron radiation indicate that the derived samples are mixtures of known and unknown phases. However, the powder X-ray diffraction patterns are not sufficient for structural characterization. Transmission electron microscopy studies reveal crystals of several hundreds of nanometres in size with different chemical composition. Among them, crystals of a previously unknown phase with stoichiometry SnGe4N4O4 were detected and investigated using automated diffraction tomography (ADT), a three-dimensional electron diffraction method. Via ADT, the crystal structure could be determined from single nanocrystals in space group P63mc, exhibiting a nolanite-type structure. This was confirmed by density functional theory calculations and atomic resolution scanning transmission electron microscopy images. In one of the syntheses runs a rhombohedral 6R polytype of SnGe4N4O4 could be found together with the nolanite-type SnGe4N4O4. The structure of this polymorph was solved as well using ADT.

The synthetic availability of mol­ecular water oxidation catalysts containing high-valent ions of 3d metals in the active site is a prerequisite to enabling photo- and electrochemical water splitting on a large scale. Herein, the synthesis and crystal structure of di­ammonium {μ-1,3,4,7,8,10,12,13,16,17,19,22-dodeca­aza­tetra­cyclo­[8.8.4.13,17.18,12]tetra­cosane-5,6,14,15,20,21-hexa­onato}ferrate(IV) acetic acid tris­olvate, (NH4)2[FeIV(C12H12N12O6)]·3CH3COOH or (NH4)2[FeIV(L–6H)]·3CH3COOH is reported. The FeIV ion is encapsulated by the macropolycyclic ligand, which can be described as a dodeca-aza-quadricyclic cage with two capping tri­aza­cyclo­hexane fragments making three five- and six six-membered alternating chelate rings with the central FeIV ion. The local coord­ination environment of FeIV is formed by six deprotonated hydrazide nitro­gen atoms, which stabilize the unusual oxidation state. The FeIV ion lies on a twofold rotation axis (multiplicity 4, Wyckoff letter e) of the space group C2/c. Its coordination geometry is inter­mediate between a trigonal prism (distortion angle φ = 0°) and an anti­prism (φ = 60°) with φ = 31.1°. The Fe—N bond lengths lie in the range 1.9376 (13)–1.9617 (13) Å, as expected for tetra­valent iron. Structure analysis revealed that three acetic acid mol­ecules additionally co-crystallize per one iron(IV) complex, and one of them is positionally disordered over four positions. In the crystal structure, the ammonium cations, complex dianions and acetic acid mol­ecules are inter­connected by an intricate system of hydrogen bonds, mainly via the oxamide oxygen atoms acting as acceptors.

In the structure of the title salt, {[Ba(μ3-C3H2N3O2)2(μ-H2O)(H2O)]·H2O}n, the barium ion and all three oxygen atoms of the water mol­ecules reside on a mirror plane. The hydrogen atoms of the bridging water and the solvate water mol­ecules are arranged across a mirror plane whereas all atoms of the monodentate aqua ligand are situated on this mirror plane. The distorted ninefold coord­ination of the Ba ions is completed with four nitroso-, two carbonyl- and three aqua-O atoms at the distances of 2.763 (3)–2.961 (4) Å and it is best described as tricapped trigonal prism. The three-dimensional framework structure is formed by face-sharing of the trigonal prisms, via μ-nitroso- and μ-aqua-O atoms, and also by the bridging coordination of the anions via carbonyl-O atoms occupying two out of the three cap positions. The solvate water mol­ecules populate the crystal channels and facilitate a set of four directional hydrogen bonds. The principal Ba–carbamoyl­cyano­nitro­somethanido linkage reveals a rare example of the inherently polar binodal six- and three-coordinated bipartite topology (three-letter notation sit). It suggests that small resonance-stabilized cyano­nitroso anions can be utilized as bridging ligands for the supra­molecular synthesis of MOF solids. Such an outcome may be anti­cipated for a broader range of hard Lewis acidic alkaline earth metal ions, which perfectly match the coordination preferences of highly nucleophilic nitroso-O atoms. Thermal analysis reveals two-stage dehydration of the title compound (383 and 473 K) followed by decomposition with release of CO2, HCN and H2O at 558 K.

Analysis of small-angle scattering (SAS) data requires intensive modeling to infer and characterize the structures present in a sample. This iterative improvement of models is a time-consuming process. Presented here is Scattering Equation Builder (SEB), a C++ library that derives exact analytic expressions for the form factors of complex composite structures. The user writes a small program that specifies how the sub-units should be linked to form a composite structure and calls SEB to obtain an expression for the form factor. SEB supports e.g. Gaussian polymer chains and loops, thin rods and circles, solid spheres, spherical shells and cylinders, and many different options for how these can be linked together. The formalism behind SEB is presented and simple case studies are given, such as block copolymers with different types of linkage, as well as more complex examples, such as a random walk model of 100 linked sub-units, dendrimers, polymers and rods attached to the surfaces of geometric objects, and finally the scattering from a linear chain of five stars, where each star is built up of four diblock copolymers. These examples illustrate how SEB can be used to develop complex models and hence reduce the cost of analyzing SAS data.

The influence of various combinations of residual stress, composition and grain interaction gradients in polycrystalline materials with cubic symmetry on energy-dispersive X-ray stress analysis is theoretically investigated. For the evaluation of the simulated sin2ψ distributions, two different strategies are compared with regard to their suitability for separating the individual gradients. It is shown that the separation of depth gradients of the strain-free lattice parameter a0(z) from residual stress gradients σ(z) is only possible if the data analysis is carried out in section planes parallel to the surface. The impact of a surface layer z* that is characterized by a direction-dependent grain interaction model in contrast to the volume of the material is quantified by comparing a ferritic and an austenitic steel, which feature different elastic anisotropy. It is shown to be of minor influence on the resulting residual stress depth profiles if the data evaluation is restricted to reflections hkl with orientation factors Γhkl close to the model-independent orientation Γ*. Finally, a method is proposed that allows the thickness of the anisotropic surface layer z* to be estimated on the basis of an optimization procedure.

Predicting crystal symmetry simply from chemical composition has remained challenging. Several machine-learning approaches can be employed, but the predictive value of popular crystallographic databases is relatively modest due to the paucity of data and uneven distribution across the 230 space groups. In this work, virtually all crystallographic information available to science has been compiled and used to train and test multiple machine-learning models. Composition-driven random-forest classification relying on a large set of descriptors showed the best performance. The predictive models for crystal system, Bravais lattice, point group and space group of inorganic compounds are made publicly available as easy-to-use software downloadable from https://gitlab.com/vishsoft/cosy.

Football season is in full swing and the Kansas City Chiefs are going the extra yard by scoring a major victory for the environment.

Sun & Swell Foods, a Benefit Corporation and leading clean snack food company, has officially launched compostable packaging, making it one of the first snack companies in the US market to do so.

The UK’s first “wonky” bread box required an an eco-friendly bag, and Earth & Wheat found the ideal solution in the form of a home-compostable bag supplied by KM Packaging.

The ingredient reportedly delivers the a premium taste profile closest to sugar, even at high sugar replacement levels, while offering a more cost-effective solution than other premium sweeteners.

New “Compozym” enzyme series reduces dependence on global wheat markets.

Global conditions and crises are putting increasing pressure on the world's flour market.

This product not only offers a healthy snack option, but also addresses the growing concern of packaging waste in India.

In an exclusive event celebrating the enduring legacy of Ruth and Skitch Henderson, United Nations Accredited NGO Hunt Hill Farm is set to nominate esteemed American composer Kim Scharnberg as Goodwill Ambassador.

New tool empowers individuals to align their banking choices with climate-positive actions.

Mayton is launching the Renevv 9.5, a food waste disposer utilizing high-temperature sterilization on the U.S. crowdfunding platform Kickstarter.

Indoor growers will have access to a highly engineered, inert, fully-compostable grow media, eliminating food waste, creating an efficient closed-loop agriculture system and alleviating climate-related risks from current industry grow media types.

Effendi's Unwavering Belief in His Dreams Allowed for this Incredible Global Achievement

Mark Andrew Cook, PhD, is a retired professor and an expert in composing and performing

Avid editors can now access eMAM's integrated tools and ecosystem.

Say hello to Composition, our new multipurpose WordPress theme that has all the right ingredients for building any kind of website. What is a Multipurpose WordPress Theme? Simply put, a multipurpose WordPress theme is designed with maximum flexibility in mind. This means that you can use Composition for a wide range of websites including ones for Businesses, Portfolios, […]

Nov 22, 2024, 12pm EST

Tufts Composers present new vocal settings suggested by T.J. Anderson's 2022 Three Songs of Life, offered alongside songs, settings, and instrumentals by Julia Cavallaro, Duke Ellington, Eliza Howells, Matthew Seliger, Melinda Tian, Angela Tsou, Christopher Walton, and guest composer and Tufts alum Trevor Weston. Featuring soprano Janet Stone, mezzo sopranos Julia Cavallaro and Eliza Howells, pianist John McDonald, and bassoonist Angela Tsou.

Building: Perry and Marty Granoff Music Center
Campus Location: Medford/Somerville campus
City: Medford, MA 02155
Campus: Medford/Somerville campus
Location Details: Distler Performance Hall
Wheelchair Accessible (for in-person events): Yes
Open to Public: Yes
Event Type: Performance
Subject: Music
Event Sponsor: School of Arts and Sciences
Event Sponsor Details: Tufts Music
Event Contact Name: Anna Griffis
Event Contact Email: anna.griffis@tufts.edu
Event Contact Phone: 6176272253
Event Admission: free; no tickets required
More info: as.tufts.edu…

Comprehensive Proteomics Analysis of the Hemolymph Composition of Sugar-Fed Aedes aegypti Female and Male Mosquitoes  ACS Publications

Soyo Oka walks us through her journey from studying classical music to calling up Nintendo looking for a gig.

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Compositions provide a soundtrack for the Cassini probe’s final plunge into planetToronto, ON –After centuries of looking with awe and wonder at the beauty of Saturn and its rings, we can now listen to them, thanks to the efforts of astrophysicists at the University of Toronto (U of T). “To celebrate the Grand Finale of […]

The Digital Twin Consortium (DTC) Composability Framework provides a transformative approach to digital twin system development, focusing on interoperability, security, trustworthiness, scalability, and design reuse to align with businesses’ objectives and evolving needs.

A new technology has been developed that can decompose refrigerants, using a catalyst made from industrial waste called “red mud.'’ 

Creative Composites Group's acquisition of Enduro will add to CCGs suite of manufacturing capabilities and geographic reach.

Innovations in how compostable packaging is made, along with new technology for composting, are among the forces working to increase the use of this type of packaging.

The solution integrates Eastman’s biobased and compostable Solus performance additives with BioPBS polymer to form a thin coating on UPM’s compostable and recyclable barrier base papers.

All cups, lids, containers and cutlery in the new Veridian™ line feature the word “Compostable,” display the BPI Certification Mark signifying that the material is compostable, and include green or brown identification elements like tinting and striping that further help distinguish them from their non-compostable counterparts. 

Veridian™ products are easily identifiable as compostable and are compliant with the state’s upcoming labeling law.

New tenant requirement sets foodservice-ware standards that aim to reduce waste.

The exciting innovations for retail and foodservice customers include Carrot Shakers, Side Dish Sizzlers, and Soup n' Stewin' Carrots. Beyond offering healthy school lunch options, Bolthouse Fresh products create new possibilities for holiday season entertaining.

Mars' use of this simulation technology has already reduced the quantity of plastics purchased by Mars for testing by approximately 246 tons.

Joseph Zeppilli, Co-Founder of Bad Monkey Popcorn, talks about the company’s journey toward creating viable compostable packaging for one of the world’s most popular snack foods.

Sustainable retail packaging solution replaces expanded polystyrene on processor production lines.

Part of the company’s GeoPack range of sustainability-minded products, the protein tray has been officially designated as biodegradable in industrial compost settings.

A campaign highlighting the benefits of composting household waste, supported by the OSCE Mission to Montenegro, was launched on 1 July 2016 in Pljevlja, by the Montenegrin Sustainable Development and Tourism Ministry, the Municipality of Pljevlja and the Eco-Centre Dolphin NGO.

Some 40 participants - representatives of the Sustainable Development and Tourism Ministry; the municipal authorities of Berane, Bijelo Polje and Pljevlja; local public utility companies from Pljevlja and Kotor; and NGOs as well as citizens, attended the campaign launch.

“Composting household waste is just an element of broader waste management, one of the most current issues facing Montenegrin authorities in their efforts to bring the relevant policy, strategy and legislative frameworks in line with the international standards and requirements of the advancing integration processes,” said Programme Manager at the OSCE Mission Vladimir Ragozin.

President of the Municipality of Pljevlja Mirko Đačić said: “Our municipality is actively involved in enhancing the local environment, especially regarding air quality improvements.”

State Secretary at the Sustainable Development and Tourism Ministry Daliborka Pejović stated that the primary waste separation is unquestionable and the educational campaigns are crucial bearing in mind the State’s plan of 50-70% of waste to be primary separated d until 2020.

“The waste should be perceived as a resource that can be further used through development of recycling and composting industry,” said Director of Eco-Centre Dolphin NGO Ljilja Radunović. “It is recommended, under the EU Directive on Landfills, to consider the policy of the closure of landfills starting from 2020 because they proved to be unsustainable.” 

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GSTP-CSS - The composite source signal as a measuring signal and a summary of various investigations on speech echo cancellers

Antonio Costa, de la carnicería Chelo & Muñico, fue atacado durante la madrugada, al llegar a su puesto de trabajo Leer

The fungus has decimated chestnut trees in the national park, and larger trees have been slow to replace them.