meri Life and Death of the American Worker: The Immigrants Taking on America’s Largest Meatpacking Company By ifp.nyu.edu Published On :: Sat, 12 Oct 2024 16:22:51 +0000 The post Life and Death of the American Worker: The Immigrants Taking on America’s Largest Meatpacking Company was curated by information for practice. Full Article Monographs & Edited Collections
meri These Social Housing Projects Around the World Can Inspire America’s New Housing Era By ifp.nyu.edu Published On :: Mon, 14 Oct 2024 16:32:20 +0000 The post These Social Housing Projects Around the World Can Inspire America’s New Housing Era was curated by information for practice. Full Article Monographs & Edited Collections
meri 10 Best Books for Understanding American Class By ifp.nyu.edu Published On :: Thu, 17 Oct 2024 16:04:54 +0000 The post 10 Best Books for Understanding American Class was curated by information for practice. Full Article Monographs & Edited Collections
meri Home Ownership in America: A Socio-Cultural History of Housing in the United States By ifp.nyu.edu Published On :: Sat, 19 Oct 2024 16:42:04 +0000 The post Home Ownership in America: A Socio-Cultural History of Housing in the United States was curated by information for practice. Full Article Monographs & Edited Collections
meri The Practice of Electroconvulsive Therapy, Third Edition: Recommendations for Treatment, Training, and Privileging (A Task Force Report of the American Psychiatric Association) By ifp.nyu.edu Published On :: Mon, 04 Nov 2024 16:51:11 +0000 The post The Practice of Electroconvulsive Therapy, Third Edition: Recommendations for Treatment, Training, and Privileging (A Task Force Report of the American Psychiatric Association) was curated by information for practice. Full Article Monographs & Edited Collections
meri Essential Science Conversations Presents: Dismantling Racism in the Field of Psychology and Beyond: Conversation with the Editors of the Special Issue of the American Psychologist By ifp.nyu.edu Published On :: Sat, 26 Oct 2024 14:31:52 +0000 The post Essential Science Conversations Presents: Dismantling Racism in the Field of Psychology and Beyond: Conversation with the Editors of the Special Issue of the American Psychologist was curated by information for practice. Full Article Guidelines Plus
meri PEN America Index of Educational Gag Orders By ifp.nyu.edu Published On :: Fri, 01 Nov 2024 14:36:50 +0000 The post PEN America Index of Educational Gag Orders was curated by information for practice. Full Article Guidelines Plus
meri The most unequal region in the world: combatting inequality in Latin America | By ifp.nyu.edu Published On :: Sun, 03 Nov 2024 16:22:37 +0000 The post The most unequal region in the world: combatting inequality in Latin America | was curated by information for practice. Full Article Video
meri Debt in America By ifp.nyu.edu Published On :: Sat, 05 Oct 2024 20:16:21 +0000 The post Debt in America was curated by information for practice. Full Article Infographics
meri SAVAGE LOVE: Mourning in America By www.portlandmercury.com Published On :: Tue, 12 Nov 2024 13:12:00 -0800 Advice for those who feel like democracy has abandoned them. by Dan Savage Dear Readers: Well, fuck. Reading a sex-advice column at a time like this — to say nothing of writing a sex-advice column at a time like this — might seem a little pointless. But I’ve lived long enough to know that seemingly pointless distractions, small comforts, and guilty pleasures have the power to sustain us in bad times. Taking a moment to read (or write or illustrate) a sex-advice column — or listen to or make some music or watch or make some porn — doesn’t mean you’re complacent or complicit. (Unless you voted for him, of course, in which case you can fuck the fuck off.) Because it’s the little things — the small pleasures — that keep us sane, keep us connected, and keep us going. Anyway, sitting down to write a column this week lifted my spirits a bit. I hope reading this week’s column lifts yours.… [ Read more ] Full Article Savage Love
meri A Call from the Shakespeare Association of America By feeds.playshakespeare.com Published On :: Sat, 18 Mar 2017 11:25:30 -0400 Today, we received this message from the leadership of the Shakespeare Association of America. It's intended for the Shakespeare theatre members of SAA, but has farther reaching implications so we felt it was important to share on our blog and elsewhere. --------------- American members of the SAA have the chance to make a diffe... Full Article General
meri The Bookshelf: The Little-Known History Of Violence At New England's African American Schools By www.nhpr.org Published On :: Tue, 16 Jun 2020 11:22:04 -0400 The history of school desegregation in America has long been centered around the southern United States. Full Article
meri The Particular Sadness of Trout Fishing in America By beta.prx.org Published On :: Tue, 12 Nov 2019 13:54:58 -0000 People love fishing for trout. They love it so much that we are willing to go to insane lengths to catch them. But what should we make of the fact that much of that experience of fishing for trout is just a facsimile of what it once was… and may actually be bad for the very same fish, that we so love to catch? Find more Outside/In at outsideinradio.org Full Article
meri Renowned Indian-American behavioral economist to join Booth School of Business By www.newsindiatimes.com Published On :: Wed, 23 May 2018 10:10 -0500 Behavioral economist Sendhil Mullainathan to join Booth faculty as University Professor Full Article
meri Philip Roth, Towering Novelist Who Explored Lust, Jewish Life and America, Dies at 85 By www.nytimes.com Published On :: Wed, 23 May 2018 10:12 -0500 Obituary recounts life and career of alumnus and preeminent novelist Philip Roth Full Article
meri Dom Flemons presents a new image of the American cowboy By minnesota.publicradio.orghttps Published On :: Sun, 06 Jan 2019 10:40:00 -0600 The singer-songwriter's latest album, "Black Cowboys," chronicles the role played by African-Americans in settling the West after the Civil War. The album has been nominated for a Grammy. Full Article
meri How "God Bless America" became a hit By minnesota.publicradio.orghttps Published On :: Thu, 21 Mar 2019 10:38:34 -0500 80 years ago Kate Smith recorded what would become her signature song "God Bless America." The original version was written in 1918 by Irving Berlin. He re-worked the lyrics a bit and when Smith sang it on her nationally-syndicated radio show, it became an immediate hit. Full Article
meri White singers in Hungary claim to be African-American, for an opera By minnesota.publicradio.orghttps Published On :: Fri, 12 Apr 2019 06:31:47 -0500 The Gershwin estate stipulates that "Porgy and Bess" should be performed by an all-black cast. The Hungarian State Opera in Budapest reportedly asked its mostly white cast to say that they are black. Full Article
meri Minnesota-inspired Cuban American Youth Orchestra launches its first tour By minnesota.publicradio.orghttps Published On :: Sun, 19 May 2019 19:00:00 -0500 Eleven members of the Minnesota Orchestra will join 25 young U.S. musicians in Cuba for the inaugural tour of an organization inspired by the 2015 Minnesota Orchestra visit to Havana. Full Article
meri Buses of the All American Girls Professional Baseball League (8/20/2010) By calendar.rsvpa.com Published On :: Fri, 20 Aug 2010 04:00:00 GMT Start Date: 8/20/2010End Date: 8/20/2010All American Girls Professional Baseball League and Their Buses will be a new display for August, 2010 along with an encore presentation of the Buses of the Negro Leagues Baseball Teams which was originally displayed in February of this year at the Antique Automobile Club of America (AACA) Museum. The Museum of Bus Transportation which displays 12 vintage buses on the lower level of the Antique Automobile Club of America (AACA) Museum has arranged this special exhibit for the month of August. Full Article 08/20/2010
meri Buses of the All American Girls Professional Baseball League (8/19/2010) By calendar.rsvpa.com Published On :: Thu, 19 Aug 2010 04:00:00 GMT Start Date: 8/19/2010End Date: 8/19/2010All American Girls Professional Baseball League and Their Buses will be a new display for August, 2010 along with an encore presentation of the Buses of the Negro Leagues Baseball Teams which was originally displayed in February of this year at the Antique Automobile Club of America (AACA) Museum. The Museum of Bus Transportation which displays 12 vintage buses on the lower level of the Antique Automobile Club of America (AACA) Museum has arranged this special exhibit for the month of August. Full Article 08/19/2010
meri John Cooper sounds alarm on America’s 'dangerous precipice' with Skillet’s new album 'Revolution' By www.christianpost.com Published On :: Sat, 02 Nov 2024 10:25:27 -0400 With the release of Skillet's latest album, "Revolution," lead singer John Cooper is more impassioned than ever, sounding an alarm over what he sees as a pivotal moment in America’s history. Full Article
meri Christians must be 'major influencers' in American politics, say activists on opposite sides By www.christianpost.com Published On :: Sat, 02 Nov 2024 20:28:58 -0400 Two Christian activists urged fellow believers to remain active in politics, contending that they have an obligation to become “major influencers” in American society by restoring civility to political discourse. Full Article
meri The conflation of race and sexuality — why it matters for Evangelical America By www.christianpost.com Published On :: Sun, 29 Sep 2024 08:05:49 -0400 If American Evangelical Christians want any moral legs to stand on in the sexuality debate, we must own up to our sordid racial past. Full Article
meri Russia school shooting: From American nightmare to Russian bitter reality By english.pravda.ru Published On :: Thu, 07 Dec 2023 15:05:00 +0300 On December 7, a girl student, an eighth-grader, went on a shooting spree at Bryansk School No. 5. Five people were injured, two were killed, including the girl shooter herself. The girl's motive for the attack is yet to be established. According to unconfirmed reports, the girl suffered from bullying at school. This is the first time in the history of school shooting incidents in Russia, when the shooter was a girl. No incidents of school shooting were known in Russia before 2014. Before 2014, many in Russia believed that the phenomenon of school shooting was inherent with the United States. After 2014, however, episodes fo school shooting began to occur throughout Russia on a regular basis. 2014, Moscow Full Article Society
meri "God bless the Russians," the Americans used to say By english.pravda.ru Published On :: Mon, 20 Jan 2020 20:08:00 +0300 It is an open secret that the Russian Empire, holding the position of benevolent neutrality, provided enormous assistance to the United States during the Civil War. What kind of role was it exactly, though?One should recollect here the person, who contributed a lot to Russia's decision to support Abraham Lincoln, rather than his opponents from the Confederation. It goes about Cassius Marcellus Clay. That was an outstanding person indeed. Clay, who owned plantations in Kentucky, liberated his slaves, but allowed them to continue working for money. His act was unprecedented for that time, and Cassius Clay instantly made a huge amount of enemies. They attacked him several times. At one point, Clay had to fight six Turner brothers and he won the fight having killed one of the brothers. Russian Emperor II saved Abraham Lincoln Abraham Lincoln found such an ardent abolitionist to be suitable for the post of US Ambassador to Russia. Clay had not had time to leave when the Civil War broke out. He did not leave Washington, but started forming a group of volunteers to defend the White House. Cassius Clay left for St. Petersburg with his family only after the federal army arrived. The Russian Empire was going through the abolition of serfdom right at that time. One may say that the Russian leadership was sympathetic to what Abraham Lincoln was doing in the United States. Clay was pleased to report to Washington that Russian Foreign Minister Alexander Gorchakov hoped for an early suppression of the "revolt in the south."Russian Emperor Alexander II ordered to send warships to the East and to the West coast of the United States. Their captains received secret instructions in case Britain and France decide to take the side of the Confederation. The Russian fleet was ordered to support the US government.Washington appreciated Russia's move. Upon the arrival of Russian ships in New York's harbor, U.S. Navy Secretary Gideon Wells wrote in his diary: "The Russian fleet has come out of the Baltic and are now in New York, or a large number of the vessels have arrived. They are not to be confined in the Baltic by a northern winter. In sending them to this country at this time there is something significant. What will be its effect on France and the French policy we shall learn in due time. It may moderate; it may exasperate. God bless the Russians." Full Article History traditions
meri Kremlin: Russia is not confronting Americans. Russia is confronting their ideology By english.pravda.ru Published On :: Fri, 17 Nov 2023 14:00:00 +0300 Kremlin's official spokesman Dmitry Peskov gave an interview to the MGIMO 360 news channel, in which he answered questions about the presidential election, Russia's nuclear rhetoric and enemies. According to Peskov, Russia's next president should be "the same as [Vladimir] Putin… or different, but the same." "Putin has not announced his intention to run. But I sincerely want to believe that he will do it. I have no doubt that he will win the election, I have no doubt that he will continue to be our president. We'll see," Peskov said. Full Article Russia
meri Hate in America By english.pravda.ru Published On :: Tue, 26 Oct 2021 18:33:00 +0300 Nancy O'Brien Simpson I've been on a hiatus, however, the hubris of the USA and its self-righteous bullshit burns through me. Writing is a catharsis to prevent my soul from being scorched by our hypocrisy. Where to begin? The USA loves to throw stones, we love to hate. Russia is "our enemy" is blasted throughout our media. Why Russia is our enemy is never revealed. It is inferred they are commies and want to somehow harm us. So we have to fear them, nuke up against them and sanction them. Full Article Opinion
meri An Existential Dilemma for the Black American Identity By english.pravda.ru Published On :: Wed, 21 Aug 2024 17:34:00 +0300 By the 2020s, in spite of centuries after the Emancipation Proclamation (in 1863) and decades or generations of Black empowerment, there is still something fundamentally missing in the Black American identity, because the latter has failed to substantially "de-colonize" the violent colonial legacy (like the ruthless importation of Black slaves, not just the near-extermination of Native Americans) in the Thirteen British Colonies (and later the United States) in early American history. A good beginning for a long-term solution (de-colonization) is to understand in what ways the "average" Black American mindset has lost its average Black "African" roots, with the resultant effect of "inferiority complex" among Black Americans (involving both "self-hatred" within the oppressed and "anger" or "hatred" towards the oppressor, which vary in degree from person to person), on "average." Although this essay uses the case of Black Americans for analysis, the logical implication is much broader, since the same reasoning can be applied to Black communities around the world (outside sub-Saharan Africa), be they in Central America, South America, the Caribbean, Northern Europe, Southern Europe, North Africa, the Oceania, and the like. Full Article Opinion
meri The American Economy is Totally Fine…For Seriously, You Guise! By english.pravda.ru Published On :: Sun, 03 Nov 2024 16:00:00 +0300 The American stock market has approximately 250 trading days a year. Of which, there are around 60 trading days remaining. At present, the market has reached more than 45 "New All-Time Highs!” in 2024. Full Article Opinion
meri American infected with both COVID-19 and monkeypox at the same time By english.pravda.ru Published On :: Fri, 22 Jul 2022 18:14:00 +0300 An American from California simultaneously contracted the coronavirus and monkeypox, reports NBC. Mitcho Thompson, from the town of Sebastopol, told the TV channel that he tested positive for COVID-19 at the end of June, and soon after noticed red spots on his back, legs, arms and neck. "The doctor was absolutely certain that I had monkeypox and that I had both," Thompson said. Full Article Health
meri American University School of Communication Student Gabe Castro-Root is Selected for Exclusive Antarctic Expedition By www.newswise.com Published On :: Tue, 12 Nov 2024 12:20:25 EST American University's School of Communication (SOC) announced today that seasoned student journalist Gabe Castro-Root was selected to join an expedition to Antarctica where he will be reporting on the expedition. Full Article
meri American Sociological Association Appoints Heather Washington as Executive Director By www.newswise.com Published On :: Mon, 04 Nov 2024 10:00:57 EST The appointment is historic for ASA; Washington is the first person of color, and the first Minority Fellowship Program (MFP) alum named ASA executive director. Full Article
meri 10 Most Dangerous Jobs in America and 5 Common Accidents By money.howstuffworks.com Published On :: Wed, 31 Jul 2024 10:15:02 -0400 Heavy machinery and power tools are effective aids for improving efficiency, but they can also lead to serious accidents and fatal work injuries. It's no stretch of the imagination, then, to see how jobs that rely on these resources often land on the list of most dangerous jobs in America. Full Article
meri Andy Kim Wins in New Jersey, Becoming First Korean American Senator By world.kbs.co.kr Published On :: Wed, 06 Nov 2024 11:12:11 +0900 [International] : Democratic Rep. Andy Kim was elected to the U.S. Senate on Tuesday, becoming the first Korean American to serve in the Senate. With elections for the Senate and the House of Representatives taking place the same day as the U.S. presidential election, Kim defeated Curtis Bashaw in the New Jersey senatorial ...[more...] Full Article International
meri Korean American Congresswoman Young Kim Wins Third Term By world.kbs.co.kr Published On :: Fri, 08 Nov 2024 15:33:32 +0900 [International] : Korean American congresswoman Young Kim has won a third term in the U.S. House of Representatives in Tuesday’s general elections, serving California’s 40th District. According to the Associated Press, the Republican was certain to defeat her Democratic rival, Joe Kerr, with 74 percent of votes counted ...[more...] Full Article International
meri Korean American Writer Kim Ju-hea Wins Russia's Yasnaya Polyana Literary Award By world.kbs.co.kr Published On :: Fri, 11 Oct 2024 15:33:06 +0900 [Culture] : Korean American writer Kim Ju-hea was named the winner of the 2024 Yasnaya Polyana Literary Award in the foreign fiction category for her debut novel, "Beasts of a Little Land." Kim and Kirill Batygin, who translated the book into Russian, were awarded Russia's largest annual prize in literature at Moscow's ...[more...] Full Article Culture
meri Responsible extraction in South America’s Lithium Triangle - British Geological Survey By news.google.com Published On :: Fri, 02 Aug 2024 07:00:00 GMT Responsible extraction in South America’s Lithium Triangle British Geological Survey Full Article
meri Coordination geometry flexibility driving supramolecular isomerism of Cu/Mo pillared-layer hybrid networks By journals.iucr.org Published On :: The hydrothermal synthesis and structural characterization of four novel 3D pillared-layer metal–organic frameworks are studied, revealing how the malleability of copper coordination geometries drives diverse supramolecular isomerism. The findings provide new insights into designing advanced hybrid materials with tailored properties, emphasizing the significant role of reaction conditions and metal ion flexibility in determining network topologies. Full Article text
meri Signal-to-noise and spatial resolution in in-line imaging. 1. Basic theory, numerical simulations and planar experimental images By journals.iucr.org Published On :: 2024-06-06 Signal-to-noise ratio and spatial resolution are quantitatively analysed in the context of in-line (propagation based) X-ray phase-contrast imaging. It is known that free-space propagation of a coherent X-ray beam from the imaged object to the detector plane, followed by phase retrieval in accordance with Paganin's method, can increase the signal-to-noise in the resultant images without deteriorating the spatial resolution. This results in violation of the noise-resolution uncertainty principle and demonstrates `unreasonable' effectiveness of the method. On the other hand, when the process of free-space propagation is performed in software, using the detected intensity distribution in the object plane, it cannot reproduce the same effectiveness, due to the amplification of photon shot noise. Here, it is shown that the performance of Paganin's method is determined by just two dimensionless parameters: the Fresnel number and the ratio of the real decrement to the imaginary part of the refractive index of the imaged object. The relevant theoretical analysis is performed first, followed by computer simulations and then by a brief test using experimental images collected at a synchrotron beamline. More extensive experimental tests will be presented in the second part of this paper. Full Article text
meri α-d-2'-Deoxyadenosine, an irradiation product of canonical DNA and a component of anomeric nucleic acids: crystal structure, packing and Hirshfeld surface analysis By journals.iucr.org Published On :: 2024-01-22 α-d-2'-Deoxyribonucleosides are products of the γ-irradiation of DNA under oxygen-free conditions and are constituents of anomeric DNA. They are not found as natural building blocks of canonical DNA. Reports on their conformational properties are limited. Herein, the single-crystal X-ray structure of α-d-2'-deoxyadenosine (α-dA), C10H13N5O3, and its conformational parameters were determined. In the crystalline state, α-dA forms two conformers in the asymmetric unit which are connected by hydrogen bonds. The sugar moiety of each conformer is arranged in a `clamp'-like fashion with respect to the other conformer, forming hydrogen bonds to its nucleobase and sugar residue. For both conformers, a syn conformation of the nucleobase with respect to the sugar moiety was found. This is contrary to the anti conformation usually preferred by α-nucleosides. The sugar conformation of both conformers is C2'-endo, and the 5'-hydroxyl groups are in a +sc orientation, probably due to the hydrogen bonds formed by the conformers. The formation of the supramolecular assembly of α-dA is controlled by hydrogen bonding and stacking interactions, which was verified by a Hirshfeld and curvedness surface analysis. Chains of hydrogen-bonded nucleobases extend parallel to the b direction and are linked to equivalent chains by hydrogen bonds involving the sugar moieties to form a sheet. A comparison of the solid-state structures of the anomeric 2'-deoxyadenosines revealed significant differences of their conformational parameters. Full Article text
meri Coordination variety of phenyltetrazolato and dimethylamido ligands in dimeric Ti, Zr, and Ta complexes By journals.iucr.org Published On :: 2024-08-23 Three structurally diverse 5-phenyltetrazolato (Tz) Ti, Zr, and Ta complexes, namely, (C2H8N)[Ti2(C7H5N4)5(C2H6N)4]·1.45C6H6 or (Me2NH2)[Ti2(NMe2)4(2,3-μ-Tz)3(2-η1-Tz)2]·1.45C6H6, (1·1.45C6H6), [Zr2(C7H5N4)6(C2H6N)2(C2H7N)2]·1.12C6H6·0.382CH2Cl2 or [Zr2(Me2NH)2(NMe2)2(2,3-μ-Tz)3(2-η1-Tz)2(1,2-η2-Tz)]·1.12C6H6·0.38CH2Cl2 (2·1.12C6H6·0.38CH2Cl2), and (C2H8N)2[Ta2(C7H5N4)8(C2H6N)2O]·0.25C7H8 or (Me2NH2)2[Ta2(NMe2)2(2,3-μ-Tz)2(2-η1-Tz)6O]·0.25C7H8 (3·0.25C7H8), where TzH is 5-phenyl-1H-tetrazole, have been synthesized and structurally characterized. All three complexes are dinuclear; the Ti center in 1 is six-coordinate, whereas the Zr and Ta atoms in 2 and 3 are seven-coordinate. The coordination environments of the Ti centers in 1 are similar, and so are the ligations of the Ta centers in 3. In contrast, the two Zr centers in 2 bear a different number of ligands, one of which is a bidentate η2-5-phenyltetrazolato ligand that has not been observed previously for d-block elements. The dimethylamido ligand, present in the starting materials, remained unchanged, or was converted to dimethylamine and dimethylammonium during the synthesis. Dimethylamine coordinates as a neutral ligand, whereas dimethylammonium is retained as a hydrogen-bonded entity bridging Tz ligands. Full Article text
meri Crystal structure of polymeric bis(3-amino-1H-pyrazole)cadmium dibromide By journals.iucr.org Published On :: 2023-11-14 The reaction of cadmium bromide tetrahydrate with 3-aminopyrazole (3-apz) in ethanolic solution leads to tautomerization of the ligand and the formation of crystals of the title compound, catena-poly[[dibromidocadmium(II)]-bis(μ-3-amino-1H-pyrazole)-κ2N3:N2;κ2N2:N3], [CdBr2(C3H5N3)2]n or [CdBr2(3-apz)2]n. Its asymmetric unit consists of a half of a Cd2+ cation, a bromide anion and a 3-apz molecule. The Cd2+ cations are coordinated by two bromide anions and two 3-apz ligands, generating trans-CdN4Br2 octahedra, which are linked into chains by pairs of the bridging ligands. In the crystal, the ligand molecules and bromide anions of neighboring chains are linked through interchain hydrogen bonds into a two-dimensional network. The intermolecular contacts were quantified using Hirshfeld surface analysis and two-dimensional fingerprint plots, revealing the relative quantitative contributions of the weak intermolecular contacts. Full Article text
meri Dimeric ethyltin(IV)–dibromide–hydroxide–N,N-dimethylformamide By journals.iucr.org Published On :: 2024-04-26 Di-μ-hydroxido-bis[dibromido(dimethylformamide-κO)ethyltin(IV)], [Sn2Br4(C2H5)2(OH)2(C3H7NO)2], was prepared from ethyltin(IV) bromide and N,N-dimethylformamide (DMF) in air. The crystal structure exhibits the typical structural features of dimeric Lewis-base-stabilized monoorganotin(IV)–dihalide–hydroxides, RSnHal2(OH), i.e. two octahedrally coordinated Sn atoms are linked together via two bridging hydroxide groups, resulting in a centrosymmetric four-membered rhomboid-like Sn–OH ring with acute angles at the Sn atom, obtuse angles at the O atoms and two different tin–oxygen bond lengths. With the shorter bond trans to the ethyl group, this observation underlines once more the so-called trans-strengthening effect in monoorganotin(IV) compounds with octahedrally coordinated Sn atoms. Differences and similarities in the bond lengths and angles in the four-membered Sn–OH rings have been worked out for the rings in dimeric diorganotin(IV)–halide–hydroxides, [R2SnHal(OH)]2, and hydrates of dimeric tin(IV)–trihalide–hydroxide–aqua–hydrates, [SnHal3(OH)(H2O)]2·nH2O. Full Article text
meri A 1:1 flavone cocrystal with cyclic trimeric perfluoro-o-phenylenemercury By journals.iucr.org Published On :: 2024-06-14 The title compound, systematic name tris(μ2-perfluoro-o-phenylene)(μ2-3-phenyl-4H-chromen-4-one)-triangulo-trimercury, [Hg3(C6F4)3(C15H10O2)], crystallizes in the monoclinic P21/n space group with one flavone (FLA) and one cyclic trimeric perfluoro-o-phenylenemercury (TPPM) molecule per asymmetric unit. The FLA molecule is located on one face of the TPPM acceptor and is linked in an asymmetric coordination of its carbonyl oxygen atom with two Hg centers of the TPPM macrocycle. The angular-shaped complexes pack in zigzag chains where they stack via two alternating TPPM–TPPM and FLA–FLA stacking patterns. The distance between the mean planes of the neighboring TPPM macrocycles in the stack is 3.445 (2) Å, and that between the benzo-γ-pyrone moieties of FLA is 3.328 (2) Å. The neighboring stacks are interdigitated through the shortened F⋯F, CH⋯F and CH⋯π contacts, forming a dense crystal structure. Full Article text
meri Crystal structures of the isomeric dipeptides l-glycyl-l-methionine and l-methionyl-l-glycine By journals.iucr.org Published On :: 2024-06-14 The oxidation of methionyl peptides can contribute to increased biological (oxidative) stress and development of various inflammatory diseases. The conformation of peptides has an important role in the mechanism of oxidation and the intermediates formed in the reaction. Herein, the crystal structures of the isomeric dipeptides Gly-Met (Gly = glycine and Met = methionine) and Met-Gly, both C7H14N2O3S, are reported. Both molecules exist in the solid state as zwitterions with nominal proton transfer from the carboxylic acid to the primary amine group. The Gly-Met molecule has an extended backbone structure, while Met-Gly has two nearly planar regions kinked at the C atom bearing the NH3 group. In the crystals, both structures form extensive three-dimensional hydrogen-bonding networks via N—H⋯O and bifurcated N—H⋯(O,O) hydrogen bonds having N⋯O distances in the range 2.6619 (13)–2.8513 (13) Å for Gly-Met and 2.6273 (8)–3.1465 (8) Å for Met-Gly. Full Article text
meri Crystal structure of polymeric bis(3-amino-1H-pyrazole)cadmium diiodide By journals.iucr.org Published On :: 2024-07-05 The reaction of cadmium iodide with 3-aminopyrazole (3-apz) in ethanolic solution leads to tautomerization of the ligand and the formation of crystals of the title compound, catena-poly[[diiodidocadmium(II)]-bis(μ-3-amino-1H-pyrazole)-κ2N2:N3;κ2N3:N2], [CdI2(C3H5N3)2]n or [CdI2(3-apz)2]n. Its asymmetric unit consists of a half of a Cd2+ cation, an iodide anion and a 3-apz molecule. The Cd2+ cations are coordinated by two iodide anions and two 3-apz ligands, generating trans-CdN4I2 octahedra, which are linked into chains by pairs of the bridging ligands. In the crystal, the ligand molecules and iodide anions of neighboring chains are linked through interchain hydrogen bonds into a di-periodic network. The intermolecular contacts were quantified using Hirshfeld surface analysis and two-dimensional fingerprint plots, revealing the relative quantitative contributions of the weak intermolecular contacts. Full Article text
meri Synthesis and crystal structure of poly[[μ-chlorido-μ-(2,3-dimethylpyrazine)-copper(I)] ethanol hemisolvate], which shows a new isomeric CuCl(2,3-dimethylpyrazine) network By journals.iucr.org Published On :: 2024-09-24 Reaction of copper(I)chloride with 2,3-dimethylpyrazine in ethanol leads to the formation of the title compound, poly[[μ-chlorido-μ-(2,3-dimethylpyrazine)-copper(I)] ethanol hemisolvate], {[CuCl(C6H8N2)]·0.5C2H5OH}n or CuCl(2,3-dimethylpyrazine) ethanol hemisolvate. Its asymmetric unit consists of two crystallographically independent copper cations, two chloride anions and two 2,3-dimethylpyrazine ligands as well as one ethanol solvate molecule in general positions. The ethanol molecule is disordered and was refined using a split model. The methyl H atoms of the 2,3-dimethylpyrazine ligands are also disordered and were refined in two orientations rotated by 60° relative to each other. In the crystal structure, each copper cation is tetrahedrally coordinated by two N atoms of two bridging 2,3-dimethylpyrazine ligands and two μ-1,1-bridging chloride anions. Each of the two copper cations are linked by pairs of bridging chloride anions into dinuclear units that are further linked into layers via bridging 2,3-dimethylpyrazine coligands. These layers are stacked in such a way that channels are formed in which the disordered solvent molecules are located. The topology of this network is completely different from that observed in the two polymorphic modifications of CuCl(2,3-dimethylpyrazine) reported in the literature [Jess & Näther (2006). Inorg. Chem. 45, 7446–7454]. Powder X-ray diffraction measurements reveal that the title compound is unstable and transforms immediately into an unknown crystalline phase. Full Article text
meri Formulation of perfect-crystal diffraction from Takagi–Taupin equations: numerical implementation in the crystalpy library By journals.iucr.org Published On :: 2024-10-29 The Takagi–Taupin equations are solved in their simplest form (zero deformation) to obtain the Bragg-diffracted and transmitted complex amplitudes. The case of plane-parallel crystal plates is discussed using a matrix model. The equations are implemented in an open-source Python library crystalpy adapted for numerical applications such as crystal reflectivity calculations and ray tracing. Full Article text
meri B89 and PagBrasil partner to expand Pix across Latin America By thepaypers.com Published On :: Fri, 08 Nov 2024 11:18:00 +0100 Peruvian fintech B89 has announced a partnership with Brazil-based... Full Article