1,309 research outputs found
Ethylene conversion on carbon-supported NiMo catalysts: Pore confining effect and changes in selectivity during hydrotreatment reaction
No full textJ. Matos and P.S. Poon thanks the financial support of ANID-PIA/APOYO CCTE AFB170007; ANID-FONDECYT
1190591; ANID-FONDEF ID19I10003; and ANID-FONDEF ID15I20321 projectsPeer reviewe
Mt. Borah
No full textA mountain rises above some wooded foothills. Description reads: ""Telephoto view of Mt. Borah (12,655 ft. elevation) highest mountain in Idaho, taken from Grazing Service CCC Camp Chilly #111. Forest: Challis, State: Idaho, Date: 7/1940, Author: P.S. Bieler""
Hyndman Peak
No full textA mountain is visible across a valley and between two hills. Description reads: ""Hyndman Peak (12,078 ft. elevation) as seen from upper Big Lost River near Kane Creek on Forest Road to Ketchum. Forest: Challis, State: Idaho, Date: 7/1940, Author: P.S. Bieler""
Author Correction: New perspectives on Neanderthal dispersal and turnover from Stajnia Cave (Poland)
No full textThe Author contributions section now reads:“W.N., A.N. and S.T. designed research; A.P., M.H., W.N., S.B., M.U., A.M., H.F., M.D.B., P.S., K.S., M.Ż., A.W., A.N. and S.T. performed research; A.P., M.H., W.N., S.B., M.U., A.M., H.F., M.D.B., P.S., K.S., M.Ż., A.W., A.N. and S.T. analysed data; A.P., M.H., S.T., W.N. and S.B. wrote the paper with the collaboration of all the co-authors.
P.S.: Further Thoughts from a Lifetime of Listening
No full textThe pieces in P.S. reflect Studs’s wide-ranging interests and travels, as well as his abiding connection to his hometown, Chicago. Here we have a fascinating conversation with James Baldwin, possibly Studs’s finest interview with an author; pieces on the colorful history and culture of Chicago; vivid portraits of Studs’s heroes and cohorts (including an insightful and still timely interview with songwriter Yip Harburg, known for his “Brother, Can You Spare a Dime”); and the transcript of Studs’s famous broadcast on the Depression, the very moving essence of what was to become Hard Times.https://corescholar.libraries.wright.edu/dlpp_all/1204/thumbnail.jp
Enhancing electrochemical capacitor performance of N-doped tannin-derived carbons by hydrothermal treatment in ammonia
No full text7 figures.-- © 2024. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/This study demonstrates that ammonia concentration when doping carbons using hydrothermal treatment has crucial impact on textural properties. The latter translates into an improvement of the electrochemical performance of carbon materials, when used into electrochemical capacitors, especially at high-rate performance. Nitrogen-doped carbons were synthesized by subjecting tannin to hydrothermal carbonization in ammonia solutions of varying concentrations. After carbonization and CO2 activation, the as-produced activated carbons (ACs) were tested as electrodes for electrochemical capacitors in symmetric configuration using 1 M H2SO4 as aqueous electrolyte. Interestingly, ammonia concentration during the hydrothermal synthesis step did not significantly affect the final N content (ca. 3 and 4 at. %) nor the nitrogen and oxygen functionalities on the surface. However, the use of ammonia had crucial impact on the textural properties developed by CO2 activation, and therefore on the electrochemical performance of the ACs. The best-performing N-doped AC showed specific electrode capacitance values, based on carbon material, of 212 F g−1 at 0.5 A g−1 and outstanding capacitance retention of ca. 71 % at 40 A g−1. It also showed high cycling stability, with capacitance retention of ca. 96 % after 30,000 cycles. Furthermore, this AC outperformed similar reported materials, achieving a specific energy of 4.6 W h kg−1 at 12.1 kW kg−1.O. Pinto-Burgos thanks ANID - Subdirección de Capital Humano/Doctorado, #2019/21190633. V. Fierro, A. Celzard, and J. Castro-Gutiérrez acknowledge the financial support of the European Regional Development Fund (ERDF) through the TALiSMAN and TALiSMAN2 projects. P.S. Poon and J. Matos thank ANID-FONDEF project 19I10003 and ANID-FONDECYT project 1220228. J. Matos also thanks ANID-ANILLO project ATE220014.Peer reviewe
Author Correction:A 41,500 year-old decorated ivory pendant from Stajnia Cave (Poland)
No full textCorrection to: Scientific Reports https://doi.org/10.1038/s41598-021-01221-6, published online 25 November 2021The original version of this Article contained errors in the author list where Marjolein D. Bosch was omitted from the author list, and Mikołaj Urbanowski was incorrectly listed as an author of the original Article, and has subsequently been removed.The Author contributions section now reads:“S.T. W.N. and A.N. conceived the project; S.T., W.N., A.P., M.B., S.C., M.D., H.F., A.M., M.D. B., D.P., M.P.R., C.M.R., V.S-M., G.M.S., P.S., M.S., K.S., A.V., F.W., H.W., A.W., M.Z., S.B., A.N., J-J. H., performed research; S.T., A.P., W.N., M.B., M.D.B., S.C., M.D., H.F., A.M., D.P., M.P.R., C.M.R., V.S-M., G.M.S., P.S., M.S., K.S., A.V., F.W., H.W., A.W., M.Z., S.B., A.N., J-J. H. analysed all archaeological data; S.T. and A.P. wrote the paper with the collaboration of all the co-authors.”The original Article and its accompanying Supplementary Information file have been corrected
Wanderers' Attitude to Soviet Power: Old Believer P.S. Morozov's Unknown Work
No full textРассматривается неизвестное ранее историческое сочинение старовера-странника П. С. Морозова, написанное в 1920 г. для председателя ВЦИК М. И. Калинина с целью защиты старообрядцев города Данилова Ярославской губернии от преследований местных чекистов. Главное внимание уделено особенностям осмысления старовером проблемы отношения своего согласия к советской власти.The author studies the previously unknown historic work of P.S. Morozov, a strannik (wanderer) Old Believer, written in 1920 for M.I. Kalinin, the All-Russian Central Executive Committee (VTsIK) Chairman, and intended to defend the Old Believers in the town of Danilov, Yaroslavl Province, from being pursued by Cheka officers. The author's main attention is focused on Old Believers' understanding of the attitude problem to Soviet power
Boosting electrochemical capacitor performance by nitrogen and boron doping of nanoporous tannin-derived carbon electrodes
No full text8 figures, 4 tables.This study examines the effects of nitrogen and boron doping on the electrochemical performance of tannin-derived carbon materials synthesized by hydrothermal carbonization (HTC) using ammonia and boric acid, followed by CO2 activation, focusing on electrochemical capacitor (EC) improvement. HTC treatment of tannins in ammonia and boric acid solutions effectively incorporates N and B into the carbon matrix, inducing changes in chemical, textural and morphological properties. Remarkably, all CO2-activated carbon materials exhibit similar specific surface area, estimated using 2D-NLDFT-HS applied to N2 and H2 isotherms at −196 °C, allowing a fair comparison of electrochemical behavior based on surface chemistry. Nitrogen doping improved capacitance retention and energy density, surpassing both undoped and B-doped materials despite their comparable surface areas. X-ray photoelectron spectroscopy (XPS) analysis revealed that nitrogen functionalities and quinone groups play a critical role in enhancing charge storage, coupled with boosted Faradaic interactions between them and 1 M H2SO4, the aqueous electrolyte used in this study. Conversely, materials abundant in carboxylic acid species may hinder electric double-layer formation, thereby limiting electrical storage when used as EC electrodes. N-doped, tannin-derived carbon materials displayed acceptable capacitor performance, achieving specific cell capacitance values close to 42 F∙g−1 at 0.5 A∙g−1, with excellent capacitance retention reaching 74 % at a high applied current of 40 A∙g−1. This performance, achieved with a surface area close to 1200 m2∙g−1, underscores the efficacy of nitrogen doping in enhancing EC performance of tannin-derived carbon materials as promising and sustainable electrode materials.O. Pinto-Burgos thanks ANID - Subdirección de Capital Humano/Doctorado, # 2019/21190633, Post doctorate funding 30000000-002 VRAE 2025-UBB and ANID-FONDEF ID23I10025. V. Fierro, A. Celzard and J. Castro-Gutiérrez acknowledge the financial support of the European Regional Development Fund (ERDF) through the TALiSMAN and TALiSMAN2 projects. P.S. Poon and J. Matos thank ANID-FONDEF 19I10003, ANID-FONDEF ID23I10025, ANID-FONDECYT 1220228, ANID-FONDECYT 1240641, and ANID-ANILLO ATE220014 projects.Peer reviewe
Literary Diary as an Attempt at Autotherapy of War Trauma (on the Example of Valeria Burlakova’s Novel 'Zhyttia' P.S.)
No full textThe article is a scientific attempt to understand and present to the contemporary recipient the artistic dimension of war and its reflection in the cultural consciousness of the society of the twenty-first century. The author appeals to the literary diary titled Zhyttia P.S. (The Life P.S.), written by a soldier participating in the Russian-Ukrainian war in Donbas. Certain features of the work provide evidence that it is a hybrid war. For Ukrainians, it is a war for real memory. Most attention in the researching of the literary reception of this traumatic event is paid to three fundamental signs. The first one is the gender peculiarity – the story is told by a woman who fought at the front and lost there her beloved person, who was killed by the enemy. The second peculiarity is the feature of writing therapy, when writing the diary opened the possibility of release from the experienced trauma. And the third one is the genre of diary, which is a memoir and at the same time an artistic reflection of the image of war
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