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Let me start by saying I’m not the first lead singer to leave a band. I call it LSD: Lead Singer’s Disease. I always have to emphasise that it was a classic case of communication breakdown. After the Painkiller tour we were like dead dogs, we were exhausted. I’d said years before that at some point I might want to wander off and do something different and they’d all given me their blessing. It wasn’t cunning, or unexpected, it was just the way things went.” Fig. 9 Examples of phenoxy-Al catalysts used in cyclic ester ROP and/or PO ROP. Cat + refers to cation. Recently, Horeglad and co-workers reported a series of alkylgallium alkoxide complexes stabilised by a range of N-heterocyclic carbenes (NHCs) including SI(Me–Mes), SI(Dipp–Mes) or SI(Mes–Mes)) ( 23a–23c, Fig. 10). These complexes were highly active and stereoselective in rac-LA ROP, even under mild conditions (in CH 2Cl 2, −20 °C). 56–58 The NHC influences both the ROP activity and selectivity, as the efficient interaction of rac-LA with the Ga-methoxide unit depends on space available for monomer insertion (reactivity: SI(Me–Mes) ( 23a) > SI(Dipp–Mes) ( 23b) ≫ SI(Mes–Mes) ( 23c); P iso-max = 0.83, 0.78 and 0.56, respectively). Arthur Reardon (2011), Metallurgy for the Non-Metallurgist (2nd ed.), ASM International, ISBN 978-1615038213

D. R. Moore, M. Cheng, E. B. Lobkovsky and G. W. Coates, J. Am. Chem. Soc., 2003, 125, 11911–11924 CrossRef . The first thing we did was embrace this term, ‘heavy metal’. We’d get asked and we’d say, ‘We are a heavy metal band.’ There weren’t many places to look at, to judge, or level yourselves with. But you have to hone down who you are with the instruments you’ve got – finding your own character is vitally important. Scheme 10 General aluminium salen catalysed ROCOP mechanism for propylene oxide and succinic anhydride with PPNCl co-catalyst. OR refers to the growing polymer chain. https://www.angloamerican.com/products/metallurgical-coal#/projects-operations-offices-headquarters/coal S. Inoue, H. Koinuma and T. Tsuruta, J. Polym. Sci., Part B Polym. Lett., 1969, 7, 287–292 CrossRef .

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Yufang Wu was born in Guangzhou, China. She received her B.S. degree from South China University of Technology in 2015. She currently is a PhD candidate at South China University of Technology under the supervision of Prof. Zhong Li in Chemical Engineering. She joined Prof. Omar K. Farha's group at Northwestern University as a two-year visiting scholar in January 2020. Her research interest focuses on the design and synthesis of MOFs for gas separation and liquid/gas-phase catalysis. Catalyst activity and selectivity can be optimised through choice of metal(s), ligand design and polymerisation conditions. The intro piece is signed but Priest members minus Scott Travis, who has been a member of the band for close to15 years. The first reunion pictures where without him, now this. Priest probably want to concentrate on the old “nucleus” lineup, but they should not forget that they are and should act as a unit and a band at all times. Respect to the best drummer they ever had is due. Annealing process softens the metal by heating it and then allowing it to cool very slowly, which gets rid of stresses in the metal and makes the grain structure large and soft-edged so that, when the metal is hit or stressed it dents or perhaps bends, rather than breaking; it is also easier to sand, grind, or cut annealed metal. N. Spassky, M. Wisniewski, C. Pluta and A. Le Borgne, Macromol. Chem. Phys., 1996, 197, 2627–2637 CrossRef CAS .

As the weathered copper ores in given localities were worked out, the harder sulfide ores beneath were mined and smelted. The minerals involved, such as chalcopyrite, a copper-iron sulfide, needed an oxidizing roast to remove sulfur as sulfur dioxide and yield copper oxide. This not only required greater metallurgical skill but also oxidized the intimately associated iron, which, combined with the use of iron oxide fluxes and the stronger reducing conditions produced by improved smelting furnaces, led to higher iron contents in the bronze. Iron J. Bhattacharjee, A. Harinath, H. P. Nayek, A. Sarkar and T. K. Panda, Chem. – Eur. J., 2017, 23, 9319–9331 CrossRef PubMed . Alkaline earth metal and zinc catalysts for ROCOP While early pioneering studies highlighted the ability of Zn systems to catalyse CO 2/epoxide ROCOP, subsequent catalyst development has expanded to divalent alkaline earth metals as well as sophisticated Zn catalysts. Good catalyst performance has been achieved using simple metal alkoxide salts. For example, Groysman, Mazzeo and co-workers reported a mononuclear Mg alkoxide catalyst ( 32, Fig. 13) with a BnOH or bis(triphenylphosphine)iminium chloride (PPNCl) co-catalyst, which was active for PA/CHO ROCOP. 78 Onium salts such as PPNCl are common co-catalysts in both ROP and ROCOP, and can boost the catalyst activities via the chloride anion coordinating to a metal centre and thereby increasing the nucleophilicity of a metal–X bond (where X is an initiating group or a growing polymer chain). 79–81 Notably, the choice of co-catalyst can produce vastly different results. While BnOH gave full conversion in 24 h with >99% ester selectivity, PPNCl gave 83% conversion and 92% ester linkages (albeit with lower catalyst loading). Solvent effects are also impactful, as while excess CHO improved conversion (>99% in 24 h for a 1 : 100 : 800 ratio of catalyst:anhydride:epoxide, vs. 61% in 96 h for a 1 : 100 : 100 ratio, both in 1 mL toluene), moving to neat polymerisations in CHO saw a marked drop in selectivity (25% ester linkages) along with significant polyether formation.

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Fig. 12 β-Diiminate zinc catalysts for the alternating copolymerisation of CHO and CO 2. Loosely bound dimers are highly reactive catalysts (bottom right). Different institutions are able to calibrate units of universal measurement. This eliminates technical barriers that could be a hindrance to scientific research and technological advancements. Fig. 3 Post-synthetic modification scheme exhibiting (a) cation exchange of node-based metals, (b) condensed- or vapor-phase deposition of metal ions/clusters at the node, (c) solvent assisted linker exchange (SALE) of structural ligands, (d) solvent assisted ligand incorporation (SALI) of non-structural ligands, and (e) encapsulation of catalytic species, such as nanoparticles, within the pores. In terms of production, metallurgy focuses on metallic components that are necessary for consumer or engineering products. Metal production can be divided into subsections of ferrous metallurgy and non-ferrous metallurgy. The difference between ferrous and non-ferrous metallurgy centres on the metals used in processes and alloys, with ferrous involving iron and non-ferrous involving other metals. According to USGS, ferrous metal production accounts for 95 percent of world metal production. In addition, Reyhani and co-workers introduced an Fe( II) MOF-Fenton-RAFT polymerization system to produce PDMA and poly(2-hydroxyethyl acrylate) (PHEA) in the presence of air without adding any enzyme or reducing agents to aid in deoxygenation. 52 They provide good guidance for the development of deoxygenation technology in subsequent radical polymerization reactions. Methacrylates Known for their common use in the dental industry, polymethacrylates are desired in the form of lightweight materials with high impact strength. 5 With the development of MOF-based catalysts for polymerization of methacrylates, the scope of polymerization reactions catalysed by MOFs expands further to include atom transfer radical polymerization (ATRP) reactions, common methods of polymethacrylate synthesis. Subsequently, methacrylates present the additional challenge to MOF-based catalysts of including a light-mediated process. However, MOFs rise to this challenge with their modularity, allowing for the use of photoactive organic molecules or redox active metal ions as linkers or nodes.

And we both played Philadelphia! Ironic, isn’t it? There were no metal bands at Wembley that day, how mad is that?! Bill Curbishley was managing us, and they said they wanted The Who. Bill turned around and said, ‘OK, but you’re also having Judas Priest.’ Bob Geldof knew us, so that was fine.Metallurgy can be separated into two categories, extractive and physical metallurgy. After metals have been extracted and processed, they can be used for production. A. P. Dove, V. C. Gibson, E. L. Marshall, A. J. P. White and D. J. Williams, Chem. Commun., 2002, 1208–1209 RSC . J. Diebler, H. Komber, L. Häußler, A. Lederer and T. Werner, Macromolecules, 2016, 49, 4723–4731 CrossRef CAS .

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