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Birch Benders Organic Ultimate Fudge Brownie Mix

Crafted with premium organic ingredients, the brownies offer a chocolate experience while upholding a commitment to clean eating.




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Natural & Organic Product Trends for 2024

A Prepared Foods infographic highlighting 2024 trends in Natural & Organic seen at Natural Products Expo West.




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Rising to the Challenge of Organic Baking

“The prices for all ingredients can be very high,” affirms Andrea Bayne, owner and head baker of BoriMami Bakery in Melbourne, Florida. “Demand for organic products exceeds supply, which can cause price increases and make consistent sourcing an issue.”




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Nature’s Path Organic Foods Appoints Marketing Leadership

Joshi will focus on deepening consumer connections, expanding market reach in the US, leading the R&D organization and driving sustained growth for Nature’s Path’s portfolio of USDA Organic and Non-GMO Project Certified breakfast, baking, and snack brands. 




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Applegate Farms Organic Pepperoni

Pepperoni fans can enjoy all the flavors of APPLEGATE NATURALS® pepperoni, now in new, organic options. 




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Sustainable Initiatives, Strategic Vision Solidify Organic Market Future

Two pioneers in global sustainability certification, FoodChain ID and ReSeed, announced the launch of a new industry-leading ReSeed Soil Carbon Methodology for carbon market initiatives. The Soil Carbon Methodology rewards farmers not only for maintaining existing soil organic carbon built through sustainable farming practices, but also for the removal and storage of additional carbon dioxide emissions by soils. The Soil Carbon Methodology is the first program on the market to offer these two key benefits, while also making voluntary carbon markets accessible for vulnerable and small farmers to scale agriculture climate initiatives worldwide.




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Better Than Bouillon Organic Beef Pho Base

Made with beef stock, roasted beef, ginger and anise, the Organic Beef Pho Base makes it easier for consumers to make a savory, flavorful pho broth.




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Celebrating Organic September: Raising Awareness for Sustainable Agriculture

As consumers become increasingly concerned about food safety, environmental sustainability, and animal welfare, organic products have seen a steady rise in demand. Organic September helps bridge the gap between consumers and the farming community by offering insights into the farming practices behind organic certification and providing access to organic products.




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Pitaya Foods No Sugar Added, Organic Smoothie Pops

The new Smoothie Pops line includes three varieties: Organic Acai & Blueberry, Organic Dragon Fruit & Mango, and Organic Passion Fruit & Peach. The new Organic Smoothie Pops are both health-forward and tasty.




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Uncle Matt's Organic Ginger Honey Lemonade

With a blend of organic lemons, Brazilian wildflower honey, infused with real Peruvian ginger, Uncle Matt's Organic has produced a blend of better for you organic ingredients without the guilt of calories and sugar.




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Dave’s Killer Bread Amped-Up Organic Protein Bars

The latest product innovation showcases the just-baked texture, organic ingredients, and whole grain nutrition that consumers know paired with plant-based protein for that extra boost.




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ROAR Organic Cherry Limeade Plus Powder, Blackberry Lemonade

The vitamin and electrolyte-packed drink mix, made for on-the-go convenience with added immunity-boosting ingredients like additional Vitamin C, Zinc and Elderberry, boasts only 2g of sugar and 20 calories per single-serve stick.




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Nextfoods' Goodbelly Organic Prebiotic Sparkling Water

With this launch, GoodBelly continues to pioneer thoughtfully crafted beverages that are good for bodies and sustainably sourced. 




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Four Sigmatic Organic Instant Teas Infused With Functional Mushrooms

Functional mushroom coffee brand, Four Sigmatic announced that it will debut a new line of organic instant teas. Each tea is infused with functional mushrooms and adaptogens for focus, calm, positive mood, and immune and gut support.




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Flavorchem Explains New Regulations on Organic Certified Flavors

As of December 27, 2019, organic certified flavors will be required in all organic food and beverage products, unless the flavor is not commercially available as organic.




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GURU Organic Energy Zero Sugar Line

“GURU Zero Wild Berry has already proven to be a huge success from the start, with our unique organic, zero-sugar formula, metabolism-boosting properties and unparalleled taste,” said Luc Martin-Privat, PharmD, GURU's brewmaster and vice president of R&D and innovation.




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Lifeway Foods Single-Serve Organic Kefir Flavors

Many of these flavor combinations have never been seen before in the cultured dairy category. In addition to being lactose-free, the new Flavor Fusions line is loaded with high-quality bioavailable nutrients, like protein, calcium, and 12 live and active probiotic cultures.




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GoodPop Organic Dairy Bars

Available nationwide at Whole Foods Market in boxes of six, the gluten-free ice cream bars are made with grass-fed organic dairy, fair trade cocoa, and organic berries. 




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David Gross on the Sisters in the Brotherhood Union Organization

David Gross, executive director, INSTALL, highlights the Sisters in the Brotherhood (SIB)—a women’s union organization within the United Brotherhood of Carpenters and Joiners of America. He provides an update on how the unions have evolved over time and talks in depth about the support and resources the SIB offers.




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National Strategy to Reduce Food Loss and Waste and Recycle Organics Announced

The joint efforts aim to reduce waste, increase recycling of organics, reduce climate pollution, save families and businesses money, and support a circular economy.




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Eight Organizations Join Forces to Help Food Industry Prepare for FSMA Rule 204

The collaboration will share clear, concise messaging and resources that enable the industry to take action in preparing for FSMA Rule 204, which mandates a comprehensive tracking and tracing system for certain high-risk foods listed on the U.S. FDA's Food Traceability List.




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Amy's Kitchen Launches Five New Global-Inspired Organic Soups

The new soup collection includes several gluten-free and dairy-free options.





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Organizational Change in the Nonprofit Context: A Scoping Review of the Literature

Nonprofit and Voluntary Sector Quarterly, Ahead of Print. This scoping review takes stock of the landscape of organizational change research in the nonprofit context. Focusing on research published in leading peer-reviewed journals in nonprofit and civil society studies, we extracted 111 published articles from 1973 to 2019. Our findings provide a comprehensive overview of the […]

The post Organizational Change in the Nonprofit Context: A Scoping Review of the Literature was curated by information for practice.



  • Meta-analyses - Systematic Reviews


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Addressing integration in the organization of palliative care in belgium: a multilevel ecosystems approach using the analytic hierarchy process (AHP) method

Palliative care is becoming an essential component of healthcare, but there is insufficient research on how integration across different levels of care (micro, meso, and macro) is realized in practice. Without… Read the full article ›

The post Addressing integration in the organization of palliative care in belgium: a multilevel ecosystems approach using the analytic hierarchy process (AHP) method was curated by information for practice.



  • Open Access Journal Articles

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After the fire, assessing the future of Notre Dame's centuries-old organ

Chief organist Olivier Latry shares recordings of music played on Notre Dame Cathedral's famed organ — and looks ahead to the church's extensive renovation process after the fire on April 15.




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Global survey of security pros finds 87% of organisations impacted by cyber threats they couldn’t detect or neutralise last year

Red Canary, the managed detection and response (MDR) provider, has released a new report, Security Operations Trends Report, providing insight into critical challenges facing modern cybersecurity teams. Partnering with independent research company Coleman Parkes, Red Canary surveyed 700 security leaders from the US, UK, New Zealand, Australia and Nordics. 




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May 2006 Post of the Month: The Evolution of Organs

Added July 3, 2006:




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Maintaining "Good" Care: An Articulation Work Perspective on Organizational Ethics in the Healthcare Sector




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KBS and 11 Other Organizations to Take Part in K-Content Strategic Fund

[Culture] :
To strengthen the global competitiveness of K-contents, eleven organizations will pool their resources to create a strategic fund worth approximately 600 billion won, or over 454 million U.S. dollars. The Ministry of Culture, Sports and Tourism and the Ministry of Science and ICT announced Wednesday that ...

[more...]




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A contribution to the crystal chemistry and topology of organic thiosulfates: bis(1-methylpiperazinium)·S2O3·H2O versus 1-methylpiperazinediium·S2O3·3H2O

Crystal structure and topology of two new thiosulfates formed with mono- and diprotonated species of 1-methylpiperazine is reported.




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Stability of inorganic ionic structures: the uniformity approach

The crystal structure uniformity is numerically estimated as the standard deviation of the crystal space quantizer 〈G3〉. This criterion has been applied to explore the uniformity of ionic sublattices in 21465 crystal structures of inorganic ionic compounds. In most cases, at least one kind of sublattice (whole ionic lattice, cationic or anionic sublattice) was found to be highly uniform with a small 〈G3〉 value. Non-uniform structures appeared to be either erroneous or essentially non-ionic. As a result, a set of uniformity criteria is proposed for the estimation of the stability of ionic crystal structures.




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The role of carboxyl­ate ligand orbitals in the breathing dynamics of a metal-organic framework by resonant X-ray emission spectroscopy

Metal-organic frameworks (MOFs) exhibit structural flexibility induced by temperature and guest adsorption, as demonstrated in the structural breathing transition in certain MOFs between narrow-pore and large-pore phases. Soft modes were suggested to entropically drive such pore breathing through enhanced vibrational dynamics at high temperatures. In this work, oxygen K-edge resonant X-ray emission spectroscopy of the MIL-53(Al) MOF was performed to selectively probe the electronic perturbation accompanying pore breathing dynamics at the ligand carboxyl­ate site for metal–ligand interaction. It was observed that the temperature-induced vibrational dynamics involves switching occupancy between antisymmetric and symmetric configurations of the carboxyl­ate oxygen lone pair orbitals, through which electron density around carboxyl­ate oxygen sites is redistributed and metal–ligand interactions are tuned. In turn, water adsorption involves an additional perturbation of π orbitals not observed in the structural change solely induced by temperature.




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TAAM refinement on high-resolution experimental and simulated 3D ED/MicroED data for organic mol­ecules

3D electron diffraction (3D ED), or microcrystal electron diffraction (MicroED), has become an alternative technique for determining the high-resolution crystal structures of compounds from sub-micron-sized crystals. Here, we considered l-alanine, α-glycine and urea, which are known to form good-quality crystals, and collected high-resolution 3D ED data on our in-house TEM instrument. In this study, we present a comparison of independent atom model (IAM) and transferable aspherical atom model (TAAM) kinematical refinement against experimental and simulated data. TAAM refinement on both experimental and simulated data clearly improves the model fitting statistics (R factors and residual electrostatic potential) compared to IAM refinement. This shows that TAAM better represents the experimental electrostatic potential of organic crystals than IAM. Furthermore, we compared the geometrical parameters and atomic displacement parameters (ADPs) resulting from the experimental refinements with the simulated refinements, with the periodic density functional theory (DFT) calculations and with published X-ray and neutron crystal structures. The TAAM refinements on the 3D ED data did not improve the accuracy of the bond lengths between the non-H atoms. The experimental 3D ED data provided more accurate H-atom positions than the IAM refinements on the X-ray diffraction data. The IAM refinements against 3D ED data had a tendency to lead to slightly longer X—H bond lengths than TAAM, but the difference was statistically insignificant. Atomic displacement parameters were too large by tens of percent for l-alanine and α-glycine. Most probably, other unmodelled effects were causing this behaviour, such as radiation damage or dynamical scattering.




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Synthesis of organotin(IV) heterocycles containing a xanthenyl group by a Barbier approach via ultrasound activation: synthesis, crystal structure and Hirshfeld surface analysis

A series of organotin heterocycles of general formula [{Me2C(C6H3CH2)2O}SnR2] [R = methyl (Me, 4), n-butyl (n-Bu, 5), benzyl (Bn, 6) and phenyl (Ph, 7)] was easily synthesized by a Barbier-type reaction assisted by the sonochemical activation of metallic magnesium. The 119Sn{1H} NMR data for all four com­pounds confirm the presence of a central Sn atom in a four-coordinated environment in solution. Single-crystal X-ray diffraction studies for 17,17-dimethyl-7,7-di­phenyl-15-oxa-7-stanna­tetra­cyclo­[11.3.1.05,16.09,14]hepta­deca-1,3,5(16),9(14),10,12-hexa­­ene, [Sn(C6H5)2(C17H16O)], 7, at 100 and 295 K con­firmed the formation of a mono­nuclear eight-membered heterocycle, with a conformation depicted as boat–chair, resulting in a weak Sn⋯O inter­action. The Sn and O atoms are surrounded by hydro­phobic C—H bonds. A Hirshfeld surface analysis of 7 showed that the eight-membered heterocycles are linked by weak C—H⋯π, π–π and H⋯H noncovalent inter­actions. The pairwise inter­action energies showed that the cohesion between the heterocycles are mainly due to dispersion forces.




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On the importance of crystal structures for organic thin film transistors

Historically, knowledge of the mol­ecular packing within the crystal structures of organic semi­con­duc­tors has been instrumental in understanding their solid-state electronic properties. Nowadays, crystal structures are thus becoming increasingly important for enabling engineering properties, understanding poly­mor­phism in bulk and in thin films, exploring dynamics and elucidating phase-transition mech­a­nisms. This review article introduces the most salient and recent results of the field.




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Crystal clear: the impact of crystal structure in the development of high-performance organic semiconductors

 




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Time-series analysis of rhenium(I) organometallic covalent binding to a model protein for drug development

Metal-based complexes with their unique chemical properties, including multiple oxidation states, radio-nuclear capabilities and various coordination geometries yield value as potential pharmaceuticals. Understanding the interactions between metals and biological systems will prove key for site-specific coordination of new metal-based lead compounds. This study merges the concepts of target coordination with fragment-based drug methodologies, supported by varying the anomalous scattering of rhenium along with infrared spectroscopy, and has identified rhenium metal sites bound covalently with two amino acid types within the model protein. A time-based series of lysozyme-rhenium-imidazole (HEWL-Re-Imi) crystals was analysed systematically over a span of 38 weeks. The main rhenium covalent coordination is observed at His15, Asp101 and Asp119. Weak (i.e. noncovalent) interactions are observed at other aspartic, asparagine, proline, tyrosine and tryptophan side chains. Detailed bond distance comparisons, including precision estimates, are reported, utilizing the diffraction precision index supplemented with small-molecule data from the Cambridge Structural Database. Key findings include changes in the protein structure induced at the rhenium metal binding site, not observed in similar metal-free structures. The binding sites are typically found along the solvent-channel-accessible protein surface. The three primary covalent metal binding sites are consistent throughout the time series, whereas binding to neighbouring amino acid residues changes through the time series. Co-crystallization was used, consistently yielding crystals four days after setup. After crystal formation, soaking of the compound into the crystal over 38 weeks is continued and explains these structural adjustments. It is the covalent bond stability at the three sites, their proximity to the solvent channel and the movement of residues to accommodate the metal that are important, and may prove useful for future radiopharmaceutical development including target modification.




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Solvent organization in the ultrahigh-resolution crystal structure of crambin at room temperature

Ultrahigh-resolution structures provide unprecedented details about protein dynamics, hydrogen bonding and solvent networks. The reported 0.70 Å, room-temperature crystal structure of crambin is the highest-resolution ambient-temperature structure of a protein achieved to date. Sufficient data were collected to enable unrestrained refinement of the protein and associated solvent networks using SHELXL. Dynamic solvent networks resulting from alternative side-chain conformations and shifts in water positions are revealed, demonstrating that polypeptide flexibility and formation of clathrate-type structures at hydro­phobic surfaces are the key features endowing crambin crystals with extraordinary diffraction power.




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Tuning structural modulation and magnetic properties in metal–organic coordination polymers [CH3NH3]CoxNi1−x(HCOO)3

Three solid solutions of [CH3NH3]CoxNi1−x(HCOO)3, with x = 0.25 (1), x = 0.50 (2) and x = 0.75 (3), were synthesized and their nuclear structures and magnetic properties were characterized using single-crystal neutron diffraction and magnetization measurements. At room temperature, all three compounds crystallize in the Pnma orthorhombic space group, akin to the cobalt and nickel end series members. On cooling, each compound undergoes a distinct series of structural transitions to modulated structures. Compound 1 exhibits a phase transition to a modulated structure analogous to the pure Ni compound [Cañadillas-Delgado, L., Mazzuca, L., Fabelo, O., Rodríguez-Carvajal, J. & Petricek, V. (2020). Inorg. Chem. 59, 17896–17905], whereas compound 3 maintains the behaviour observed in the pure Co compound reported previously [Canadillas-Delgado, L., Mazzuca, L., Fabelo, O., Rodriguez-Velamazan, J. A. & Rodriguez-Carvajal, J. (2019). IUCrJ, 6, 105–115], although in both cases the temperatures at which the phase transitions occur differ slightly from the pure phases. Monochromatic neutron diffraction measurements showed that the structural evolution of 2 diverges from that of either parent compound, with competing hydrogen bond interactions that drive the modulation throughout the series, producing a unique sequence of phases. It involves two modulated phases below 96 (3) and 59 (3) K, with different q vectors, similar to the pure Co compound (with modulated phases below 128 and 96 K); however, it maintains the modulated phase below magnetic order [at 22.5 (7) K], resembling the pure Ni compound (which presents magnetic order below 34 K), resulting in an improper modulated magnetic structure. Despite these large-scale structural changes, magnetometry data reveal that the bulk magnetic properties of these solid solutions form a linear continuum between the end members. Notably, doping of the metal site in these solid solutions allows for tuning of bulk magnetic properties, including magnetic ordering temperature, transition temperatures and the nature of nuclear phase transitions, through adjustment of metal ratios.




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Elastic and inelastic strain in submicron-thick ZnO epilayers grown on r-sapphire substrates by metal–organic vapour phase deposition

A significant part of the present and future of optoelectronic devices lies on thin multilayer heterostructures. Their optical properties depend strongly on strain, being essential to the knowledge of the stress level to optimize the growth process. Here the structural and microstructural characteristics of sub-micron a-ZnO epilayers (12 to 770 nm) grown on r-sapphire by metal–organic chemical vapour deposition are studied. Morphological and structural studies have been made using scanning electron microscopy and high-resolution X-ray diffraction. Plastic unit-cell distortion and corresponding strain have been determined as a function of film thickness. A critical thickness has been observed as separating the non-elastic/elastic states with an experimental value of 150–200 nm. This behaviour has been confirmed from ultraviolet photoelectron spectroscopy, X-ray photoelectron spectroscopy and high-resolution transmission electron microscopy measurements. An equation that gives the balance of strains is proposed as an interesting method to experimentally determine this critical thickness. It is concluded that in the thinnest films an elongation of the Zn—O bond takes place and that the plastic strained ZnO films relax through nucleation of misfit dislocations, which is a consequence of three-dimensional surface morphology.




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Synthesis and characterization of an organic–inorganic hybrid crystal: 2[Co(en)3](V4O13)·4H2O

Organic–inorganic hybrid crystals have diverse functionalities, for example in energy storage and luminescence, due to their versatile structures. The synthesis and structural characterization of a new cobalt–vanadium-containing compound, 2[Co(en)3]3+(V4O13)6−·4H2O (1) is presented. The crystal structure of 1, consisting of [Co(en)3]3+ complexes and chains of corner-sharing (VO4) tetrahedra, was solved by single-crystal X-ray diffraction in the centrosymmetric space group P1. Phase purity of the bulk material was confirmed by infrared spectroscopy, scanning electron microscopy, elemental analysis and powder X-ray diffraction. The volume expansion of 1 was found to be close to 1% in the reported temperature range from 100 to 300 K, with a volume thermal expansion coefficient of 56 (2) × 10−6 K−1. The electronic band gap of 1 is 2.30 (1) eV, and magnetic susceptibility measurements showed that the compound exhibits a weak paramagnetic response down to 1.8 K, probably due to minor CoII impurities (<1%) on the CoIII site.




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Search for missing symmetry in the Inorganic Crystal Structure Database (ICSD)

An exhaustive search for missing symmetry was performed for 223 076 entries in the ICSD (2023-2 release). Approximately 0.65% of them can be described with higher symmetry than reported. Out of the identified noncentrosymmetric entries, ∼74% can be described by centrosymmetric space groups; this has implications for compatible physical properties. It is proposed that the information on the correct space group is included in the ICSD.




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Synthesis and crystal structures of three organoplatinum(II) complexes bearing natural aryl­olefin and quinoline derivatives

Three organoplatinum(II) complexes bearing natural aryl­olefin and quinoline derivatives, namely, [4-meth­oxy-5-(2-meth­oxy-2-oxoeth­oxy)-2-(prop-2-en-1-yl)phen­yl](quinolin-8-olato)platinum(II), [Pt(C13H15O4)(C9H6NO)], (I), [4-meth­oxy-5-(2-oxo-2-propoxyeth­oxy)-2-(prop-2-en-1-yl)phen­yl](quinoline-2-carboxy­l­ato)platinum(II), [Pt(C15H19O4)(C10H6NO2)], (II), and chlorido­[4-meth­oxy-5-(2-oxo-2-propoxyeth­oxy)-2-(prop-2-en-1-yl)phen­yl](quinoline)­plat­inum(II), [Pt(C15H19O4)Cl(C9H7N)], (III), were synthesized and structurally characterized by IR and 1H NMR spectroscopy, and by single-crystal X-ray diffraction. The results showed that the cyclo­platinated aryl­olefin coordinates with PtII via the carbon atom of the phenyl ring and the C=Colefinic group. The deprotonated 8-hy­droxy­quinoline (C9H6NO) and quinoline-2-carb­oxy­lic acid (C10H6NO2) coordinate with the PtII atom via the N and O atoms in complexes (I) and (II) while the quinoline (C9H7N) coordinates via the N atom in (III). Moreover, the coordinating N atom in complexes (I)–(III) is in the cis position compared to the C=Colefinic group. The crystal packing is characterized by C—H⋯π, C—H⋯O [for (II) and (III)], C—H⋯Cl [for (III) and π–π [for (I)] inter­actions.




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[SnF(bipy)(H2O)]2[SnF6], a mixed-valent inorganic tin(II)–tin(IV) compound

In the title compound, bis­[aqua­(2,2'-bi­pyridine)­fluorido­tin(II)] hexa­fluorido­tin(IV), [SnF(C10H8N2)(H2O)]2[SnF6], an ionic mixed-valent tin(II)–tin(IV) compound, the bivalent tin atom is the center atom of the cation and the tetra­valent tin atom is the center atom of the anion. With respect to the first coordination sphere, the cation is monomeric, with the tin(II) atom having a fourfold seesaw coordination with a fluorine atom in an equatorial position, a water mol­ecule in an axial position and the two nitro­gen atoms of the chelating 2,2'-bi­pyridine ligand in the remaining axial and equatorial positions. The bond lengths and angles of this hypervalent first coordination sphere are described by 2c–2e and 3c–4e bonds, respectively, all of which are based on the orthogonal 5p orbitals of the tin atom. In the second coordination sphere, which is based on an additional, very long tin–fluorine bond that leads to dimerization of the cation, the tin atom is trapezoidal–pyramidally coordinated. The tetra­valent tin atom of the centrosymmetric anion has an octa­hedral coordination. The differences in its tin–fluorine bond lengths are attributed to hydrogen bonding, as the two of the four fluorine atoms are each involved in two hydrogen bonds, linking anions and cations together to form strands.




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Three-dimensional alkaline earth metal–organic framework poly[[μ-aqua-aqua­bis­(μ3-carba­moyl­cyano­nitro­somethanido)barium] monohydrate] and its thermal decomposition

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.




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(U)SAXS characterization of porous microstructure of chert: insights into organic matter preservation

This study characterizes the microstructure and mineralogy of 132 (ODP sample), 1000 and 1880 million-year-old chert samples. By using ultra-small-angle X-ray scattering (USAXS), wide-angle X-ray scattering and other techniques, the preservation of organic matter (OM) in these samples is studied. The scarce microstructural data reported on chert contrast with many studies addressing porosity evolution in other sedimentary rocks. The aim of this work is to solve the distribution of OM and silica in chert by characterizing samples before and after combustion to pinpoint the OM distribution inside the porous silica matrix. The samples are predominantly composed of alpha quartz and show increasing crystallite sizes up to 33 ± 5 nm (1σ standard deviation or SD). In older samples, low water abundances (∼0.03%) suggest progressive dehydration. (U)SAXS data reveal a porous matrix that evolves over geological time, including, from younger to older samples, (1) a decreasing pore volume down to 1%, (2) greater pore sizes hosting OM, (3) decreasing specific surface area values from younger (9.3 ± 0.1 m2 g−1) to older samples (0.63 ± 0.07 m2 g−1, 1σ SD) and (4) a lower background intensity correlated to decreasing hydrogen abundances. The pore-volume distributions (PVDs) show that pores ranging from 4 to 100 nm accumulate the greater volume fraction of OM. Raman data show aromatic organic clusters up to 20 nm in older samples. Raman and PVD data suggest that OM is located mostly in mesopores. Observed structural changes, silica–OM interactions and the hydro­phobicity of the OM could explain the OM preservation in chert.




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Low-dose electron microscopy imaging for beam-sensitive metal–organic frameworks

Metal–organic frameworks (MOFs) have garnered significant attention in recent years owing to their exceptional properties. Understanding the intricate relationship between the structure of a material and its properties is crucial for guiding the synthesis and application of these materials. (Scanning) Transmission electron microscopy (S)TEM imaging stands out as a powerful tool for structural characterization at the nanoscale, capable of detailing both periodic and aperiodic local structures. However, the high electron-beam sensitivity of MOFs presents substantial challenges in their structural characterization using (S)TEM. This paper summarizes the latest advancements in low-dose high-resolution (S)TEM imaging technology and its application in MOF material characterization. It covers aspects such as framework structure, defects, and surface and interface analysis, along with the distribution of guest molecules within MOFs. This review also discusses emerging technologies like electron ptychography and outlines several prospective research directions in this field.




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Ten International Organizations trying to Hack into Your Computer

Hackers have been around since the early development of computers. Although they have gone by different names at different times, they've been fundamentally known as malicious all-knowing individu...