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arXiv 2020年

作者： Baza, Hend Turiv, Taras Li, Bing-Xiang Li, Ruipeng Yavitt, Benjamin M. Fukuto, Masafumi Lavrentovich, Oleg D. Department of Physics Kent State University OH United States Advanced Materials and Liquid Crystal Institute Kent State University OH United States Materials Science Graduate Program Kent State University OH United States National Synchrotron Light Source II Brookhaven National Laboratory UptonNY United States Department of Material Science and Chemical Engineering Stony Brook University Stony BrookNY United States

Lyotropic chromonic liquid crystals (LCLCs) represent aqueous dispersions of organic disk-like molecules that form cylindrical aggregates. Despite the growing interest in these materials, their flow behavior is poorly understood. Here, we explore the effect of shear on dynamic structures of the nematic LCLC, formed by 14wt% water dispersion of disodium cromoglycate (DSCG). We employ in-situ polarizing optical microscopy (POM) and small-angle and wide-angle X-ray scattering (SAXS/WAXS) to obtain independent and complementary information on the director structures over a wide range of shear rates. The DSCG nematic shows a shear-thinning behavior with two shear-thinning regions (Region I at γ −1 and Region III at γ > 10 s−1) separated by a pseudo-Newtonian Region II (1 s−1 −1). The material is of a tumbling type. In Region I, γ −1, the director realigns along the vorticity axis. An increase of γ above 1 s-1 triggers nucleation of disclination loops. The disclinations introduce patches of the director that deviates from the vorticity direction and form a polydomain texture. Extension of the domains along the flow and along the vorticity direction decreases with the increase of the shear rate to 10 s−1. Above 10 s−1, the domains begin to elongate along the flow. At γ > 100 s−1, the texture evolves into periodic stripes in which the director is predominantly along the flow with left and right tilts. The period of stripes decreases with an increase of γ. The shear-induced transformations are explained by the balance of the elastic and viscous energies. In particular, nucleation of disclinations is associated with an increase of the elastic energy at the walls separating nonsingular domains with different director tilts. The uncovered shear-induced structural effects would be of importance in the further development of LCLC applications. Copyright © 2020, The Authors. All rights reserved.

关键词： Shear deformation

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Sustainable biorefinery with Chlorolobion braunii cultivated in produced water: Bioremediation integrated with the production of exopolysaccharides, biodiesel, and bio-oil

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Chemical engineering Journal 2025年 518卷

作者： Jadson dos Santos França Ravena Maria de Almeida Medeiros Ingrid Rocha Teixeira Jânia Betânia Alves da Silva Denilson de Jesus Assis Carolina Oliveira de Souza Rosangela Regia Lima Vidal Bianca Bomfim Andrade Fernanda Teixeira Cruz José Geraldo Pacheco Roger Fréty Lucas Guimarães Cardoso Graduate Program in Chemical Engineering (PPEQ) Polytechnic School Federal University of Bahia (UFBA) Salvador Bahia Brazil Center of Science and Technology Mechanical Engineering Collegiate Federal University of Recôncavo of Bahia (UFRB) Cruz Das Almas Bahia Brazil School of Exact and Technological Sciences Salvador University Salvador Bahia Brazil Graduate Program in Food Sciences Faculty of Pharmacy Federal University of Bahia (UFBA) Salvador Bahia Brazil Department of Physical Chemistry Institute of Chemistry Federal University of Bahia (UFBA) Salvador Bahia Brazil Health Sciences Institute Federal University of Bahia (UFBA) Salvador Bahia Brazil Catalysis and Materials Laboratory Department of General and Inorganic Chemistry Institute of Chemistry Federal University of Bahia (UFBA) Salvador Bahia Brazil Federal University of Pernambuco (UFPE) Center of Technology and Geosciences Department of Chemical Engineering Institute for Petroleum and Energy Research (i-LITPEG) Laboratory of Refining and Cleaner Technology (Lateclim) Recife PE 50740-540 Brazil

Petroleum extraction generates large volumes of produced water (PW), which is an effluent containing high concentrations of pollutants that impact the environment and present a significant environmental liability for the fossil fuel industry. Among the various treatment approaches, biological methods—particularly those involving microalgae—have shown promise for PW remediation. In this study, we evaluated the bioremediation potential of PW using a microalga Chlorolobion braunii cultivated in 250 L photobioreactors. C. braunii was cultivated in a mixture containing 50 % PW and 50 % BG-11 (Blue green 11) medium (PW50%), while the control comprised only the BG-11 medium. Results demonstrated high removal efficiencies for nitrate (99.54 %), phosphate (77.78 %), iron (94 %), and manganese (75 %), along with a reduction in alkalinity (61 %). A total of 40 g of biomass was produced using 100 L of PW, containing 8.50 % lipids. This biomass mainly contained palmitic acid (C16:0) and elaidic acid (C18:1ω9t), indicating its suitability for biodiesel production according to the International Quality Standards of the American Society for Testing and materials (ASTM D6751 ) and the Brazilian National Agency of Petroleum, Natural Gas, and Biofuels (ANP). The biomass also yielded 35.12 % bio-oil and 57.69 % non-condensable gases during pyrolysis. Furthermore, 30 g of exopolysaccharides (EPS) were obtained, which exhibited pseudoplastic characteristics—a property of industrial interest. Thus, the treatment using 50 % PW for the cultivation of C. braunii was deemed a promising strategy for bioremediation and facilitated the production of high-value bioproducts.

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Corrigendum to “Control of PLA chemical structures by using GMA and DCP during reactive processing and its influence on PLA foamability” [Chem. Eng. Sci. 310 (2025) 121544]

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Chemical engineering science 2025年 313卷

作者： Ana Beatriz Valim Suquisaqui Lívia Maria Garcia Gonçalves Laís Taguchi Possari Eliada Andrade Silva Benedito dos Santos Lima Neto Rosario Elida Suman Bretas Paulo de Tarso Vieira e Rosa Sílvia Helena Prado Bettini Federal University of São Carlos Graduate Program in Materials Science and Engineering Rodovia Washington Luiz Km 235 SP-310 13565-905 São Carlos São Paulo Brazil Federal University of São Carlos Department of Materials Engineering Rodovia Washington Luiz Km 235 SP-310 13565-905 São Carlos São Paulo Brazil São Paulo University Chemistry Institute of São Carlos Avenida Trabalhador São Carlense 400 13566-590 São Carlos São Paulo Brazil University of Campinas Institute of Chemistry Cidade Universitária Zeferino Vaz 13084-862 Campinas São Paulo Brazil

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Charge and spin degrees of freedom in A-site ordered YCu3Co4O12 and CaCu3Co4O12

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Physical Review B 2021年第11期103卷 115149-115149页

作者： Yi-Ying Chin Zhiwei Hu Yuichi Shimakawa Junye Yang Youwen Long A. Tanaka Liu Hao Tjeng Hong-Ji Lin Chien-Te Chen Department of Physics National Chung Cheng University Chiayi 62102 Taiwan Max Planck Institute for Chemical Physics of Solids Nöthnitzer Strasse 40 01187 Dresden Germany Institute for Chemical Research Kyoto University Kyoto 611-0011 Japan Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China Songshan Lake Materials Laboratory Dongguan Guangdong 523808 China Quantum Matter Program Graduate School of Advanced Science and Engineering Hiroshima University Higashi-hiroshima 739-8530 Japan National Synchrotron Radiation Research Center (NSRRC) 101 Hsin-Ann Road Hsinchu 30076 Taiwan

Using soft x-ray absorption spectroscopy we were able to determine unambiguously the charge and spin states of the transition metal ions in stoichiometric YCu3Co4O12 and CaCu3Co4O12. The trivalent and low-spin nature of both the Cu and Co ions in YCu3Co4O12 makes this correlated system to be effectively a nonmagnetic band semiconductor. The substitution of Y by Ca produces formally tetravalent Co ions but the doped holes are primarily on the oxygen ligands. Concerning the spin degrees of freedom, the trivalent Co ions in YCu3Co4O12 remain low spin upon the Y-Ca substitution, very much unlike the La1−xSrxCoO3 system. The tetravalent Co ions in CaCu3Co4O12 are interestingly also in the low-spin state, which then explains the good electrical conductivity of CaCu3Co4O12 since charge exchange between neighboring Co3+ and Co4+ ions will not be hampered by the spin-blockade mechanism that otherwise would be in effect if the Co4+ and Co3+ spin quantum numbers were to differ by more than one-half. We infer that the stability of the Co low-spin state is related to the very short Co-O bond lengths.

关键词： Electrical conductivity Oxides Strongly correlated systems X-ray absorption spectroscopy

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Correction to: N‑doped carbon nanospheres as selective fluorescent probes for mercury detection in contaminated aqueous media: chemistry, fluorescence probing, cell line patterning, and liver tissue interaction

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Environmental science and pollution research international 2025年第20期32卷 2025 May 6页

作者： Soheil Sojdeh Ali Banitalebi Dehkordi Alireza Badiei Ali Zarrabi Pooyan Makvandi Milad Ashrafizadeh Mohammad Reza Saeb Eder C Lima Mohammad Rabiee Mohsen Asadnia Thomas J Webster Navid Rabiee School of Chemistry College of Science University of Tehran P.O. Box Tehran 14155‑6455 Iran. Department of Biomedical Engineering Faculty of Engineering and Natural Sciences Istinye University Istanbul Turkey. Centre for Materials Interfaces Istituto Italiano Di Tecnologia 56025 Pisa Italy. Sabanci University Orta Mahalle Üniversite Caddesi No. 27 Orhanlı Tuzla 34956 Istanbul Turkey. Department of Polymer Technology Gdańsk University of Technology G. Narutowicza 11/12 80‑233 Gdańsk Poland. Institute of Chemistry Federal University of Rio Grande Do Sul (UFRGS) Av. Bento Goncalves 9500 Postal Box 15003 Porto Alegre ZIP 91501‑970 Brazil. profederlima@***. Biomaterials Group Department of Biomedical Engineering Amirkabir University of Technology Tehran Iran. School of Engineering Macquarie University New South Wales Sydney 2109 Australia. School of Health Sciences and Biomedical Engineering Hebei University of Technology Tijian 300130 China. School of Engineering Saveetha University Chennai 602105 India. Interdisciplinary Laboratory for Advanced Materials (LIMAV) Materials Science and Engineering Graduate Program Federal University of Piaui Teresina 64049‑550 Brazil. Centre for Molecular Medicine and Innovative Therapeutics Murdoch University Perth 6150 Australia.

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Production of Biogas from Organic Fruit Waste in Anaerobic Digester using Ruminant as the Inoculum 24

Production of Biogas from Organic Fruit Waste in Anaerobic D...

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24th Regional Symposium on Chemical engineering, RSCE 2017

作者： Budiyono Manthia, Firliani Amalin, Nadya Hawali Abdul Matin, Hashfi Sumardiono, Siswo Department of Chemical Engineering Engineering Faculty Diponegoro University Semarang50275 Indonesia Master Program of Environmental Science School of Post Graduate Studies Diponegoro University Semarang50275 Indonesia

Organic waste, fruit waste and vegetable waste are the best substrate to produce biogas. Waste management system for producing biogas can be used as a solution with the waste problem by converting the wastes into biogas. This study is expected to review of the effect of substrate type and substrate composition for the volume of biogas produced. In this study, materials consist of fruit wastes (oranges, apples, papayas, and tomatoes), cow ruminant, urea, cow dung, Na2CO3 buffer, NH4HCO3 buffer, and distilled water with variations of the substrate materials, F/ W, and the buffer types. The addition of cow manure and Na2CO3 buffer with 1:2 of F/W, production of biogas is greater than variable which is used NH4HCO3 buffer and without the addition of cow dung. Variables with addition of cow dung with 1:1 of F/W and using Na2CO3 buffer, the result is greater than the variable using the same buffer but without the addition of cow dung and variables with 1:1 of F/W with the addition of cow dung and Na2CO3 buffer and variables with the same feed and without the addition of cow dung produce more biogases than variable which is the using NH4HCO3 buffer, 1:1 of F/W and without the addition of cow dung. © The Authors, published by EDP sciences, 2018.

关键词： Biogas

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Study of Biogas Production from Cassava Industrial Waste by Anaerobic Process 24

Study of Biogas Production from Cassava Industrial Waste by ...

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24th Regional Symposium on Chemical engineering, RSCE 2017

作者： Budiyono Primaloka, Arindra D. Ardhannari, Listi Matin, Hashfi H.A. Sumardiono, Siswo Department of Chemical Engineering Engineering Faculty Diponegoro University Semarang50275 Indonesia Master Program of Environmental Science School of Post-Graduate Studies Diponegoro University Semarang50275 Indonesia

Biogas production processes from tapioca wastewater have several problems that cause the biogas production is not optimal, such as pH drop at beginning of the process because the rate of acid formation is too fast and the rate of starch wastewater degradation is too slow. Therefore, to obtain optimal biogas production it is required two-stage reactor. The purposes of this research were to (i) study the influence of one stage fermentation and two stage fermentation on biogas production, (ii) study the effect of buffer Na2CO3 on biogas production, and (iii) study the effect of methanogenic bacteria concentration on biogas production from cassava starch effluent. The first method of our research was hydrolysis process by "Saccharomyces cereviceae" as substrate activator. The second is the arrangement of pH and the last is process of methane production. The results showed that the highest biogas production is achieved at concentration of methanogenic bacteria 20% (v/v) that is equal to 2458 ml. At concentration of 8% (v/v) and 15% (v/v), biogas production was 2105 ml and 2117 ml. The addition of Na2CO3 can extend to 16 days with accumulation of 372 ml. While without the addition of buffer, biogas production period was only 9 days with accumulation of 620 ml. In semi continuous process, the analysis carried out every 3 days. Highest biogas production achieved in the variable addition of yeast with the accumulation 9329 ml. Without yeast, accumulation of biogas was 6831 ml. Yeast is use as substrate activator so it can accelerate the hydrolysis process and increased biogas production. The addition of Na2CO3 is increase the alkalinity so the pH drop did not occur early in the process. © The Authors, published by EDP sciences, 2018.

关键词： Yeast

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Chiral Phonons with Giant Magnetic Moments in a Topological Crystalline Insulator

arXiv

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arXiv 2022年

作者： Hernandez, Felix G.G. Baydin, Andrey Chaudhary, Swati Tay, Fuyang Katayama, Ikufumi Takeda, Jun Nojiri, Hiroyuki Okazaki, Anderson K. Rappl, Paulo H.O. Abramof, Eduardo Rodriguez-Vega, Martin Fiete, Gregory A. Kono, Junichiro Instituto de Física Universidade de São Paulo SP São Paulo05508-090 Brazil Department of Electrical and Computer Engineering Rice University HoustonTX77005 United States Smalley-Curl Institute Rice University HoustonTX77005 United States Department of Physics The University of Texas at Austin AustinTX78712 United States Department of Physics Northeastern University BostonMA02115 United States Department of Physics Massachusetts Institute of Technology CambridgeMA02139 United States Applied Physics Graduate Program Smalley-Curl Institute Rice University HoustonTX77005 United States Department of Physics Graduate School of Engineering Science Yokohama National University Yokohama240-8501 Japan Institute for Materials Research Tohoku University Sendai980-8577 Japan Instituto Nacional de Pesquisas Espaciais SP São José dos Campos12201-970 Brazil Department of Physics and Astronomy Rice University HoustonTX77005 United States Department of Material Science and NanoEngineering Rice University HoustonTX77005 United States

We have studied the magnetic response of transverse optical phonons in Pb1−xSnxTe films. Polarization-dependent terahertz magnetospectroscopy measurements revealed Zeeman splittings and diamagnetic shifts, demonstrating that these phonon modes become chiral in magnetic fields. Films in the topological crystalline insulator phase (x > 0.32) exhibited magnetic moment values that are larger than those for topologically trivial films (x Copyright © 2022, The Authors. All rights reserved.

关键词： Phonons

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Correction to: SARS-CoV-2 removal with a polyurethane foam composite

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Environmental science and pollution research international 2023年第8期30卷 22033页

作者： Guilherme Pereira Schoeler Thays França Afonso Carolina Faccio Demarco Victor Dos Santos Barboza Tito Roberto Sant'anna Cadaval Andrei Valerão Igansi Marcos Alexandre Gelesky Janice Luehring Giongo Rodrigo de Almeida Vaucher Rafael de Avila Delucis Robson Andreazza Postgraduate Program in Environmental Sciences Center for Engineering Federal University of Pelotas R. Benjamin Constant 989 Pelotas RS CEP 96010-020 Brazil. Postgraduate Program in Materials Science and Engineering Federal University of Pelotas R. Gomes Carneiro 01 Pelotas RS CEP 96010-610 Brazil. Graduate Program in Biochemistry and Bioprospecting Research Laboratory in Biochemical and Molecular Biology of Microorganisms (LaPeBBiOM) Federal University of Pelotas RS Av. Eliseu Maciel Campus Universitário s/n Capão Do Leão CEP 96160-000 Brazil. School of Chemistry and Food Federal University of Rio Grande Av. Itália Km 8 s/n Rio Grande RS CEP 96203-000 Brazil. Postgraduate Program in Environmental Sciences Center for Engineering Federal University of Pelotas R. Benjamin Constant 989 Pelotas RS CEP 96010-020 Brazil. robsonandreazza@yahoo.com.br. Postgraduate Program in Materials Science and Engineering Federal University of Pelotas R. Gomes Carneiro 01 Pelotas RS CEP 96010-610 Brazil. robsonandreazza@yahoo.com.br.

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Bilayer osteochondral graft in rabbit xenogeneic transplantation model comprising sintered 3D-printed bioceramic and human adipose-derived stem cells laden biohydrogel

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Journal of Biological engineering 2023年第1期17卷 74-74页

作者： Lee, Chih-Yun Nedunchezian, Swathi Lin, Sung-Yen Su, Yu-Feng Wu, Che-Wei Wu, Shun-Cheng Chen, Chung-Hwan Wang, Chih-Kuang Ph.D. Program in Life Sciences College of Life Science Kaohsiung Medical University Kaohsiung 80708 Taiwan Regenerative Medicine and Cell Therapy Research Center Kaohsiung Medical University Kaohsiung 80708 Taiwan Orthopaedic Research Center College of Medicine Kaohsiung Medical University Kaohsiung 80708 Taiwan Department of Medicinal and Applied Chemistry College of Life Science Kaohsiung Medical University Kaohsiung 80708 Taiwan Departments of Orthopaedics School of Medicine College of Medicine Kaohsiung Medical University Kaohsiung 80708 Taiwan Department of Orthopaedics Kaohsiung Medical University Hospital Kaohsiung Medical University Kaohsiung 80708 Taiwan Department of Orthopaedics Kaohsiung Municipal Ta-Tung Hospital Kaohsiung Medical University Kaohsiung 80145 Taiwan Faculty of Post-Baccalaureate Medicine College of Medicine Kaohsiung Medical University Kaohsiung 80756 Taiwan Department of Surgery Division of Neurosurgery Kaohsiung Medical University Hospital Kaohsiung Medical University Kaohsiung 80708 Taiwan Department of Nursing Asia University Taichung 41354 Taiwan Ph.D. Program in Biomedical Engineering College of Medicine Kaohsiung Medical University Kaohsiung 80708 Taiwan Graduate Institute of Medicine College of Medicine Kaohsiung Medical University Kaohsiung 80708 Taiwan

Reconstruction of severe osteochondral defects in articular cartilage and subchondral trabecular bone remains a challenging problem. The well-integrated bilayer osteochondral graft design expects to be guided the chondrogenic and osteogenic differentiation for stem cells and provides a promising solution for osteochondral tissue repair in this study. The subchondral bone scaffold approach is based on the developed finer and denser 3D β-tricalcium phosphate (β-TCP) bioceramic scaffold process, which is made using a digital light processing (DLP) technology and the novel photocurable negative thermo-responsive (NTR) bioceramic slurry. Then, the concave-top disc sintered 3D-printed bioceramic incorporates the human adipose-derived stem cells (hADSCs) laden photo-cured hybrid biohydrogel (HG + 0.5AFnSi) comprised of hyaluronic acid methacryloyl (HAMA), gelatin methacryloyl (GelMA), and 0.5% (w/v) acrylate-functionalized nano-silica (AFnSi) crosslinker. The 3D β-TCP bioceramic compartment is used to provide essential mechanical support for cartilage regeneration in the long term and slow biodegradation. However, the apparent density and compressive strength of the 3D β-TCP bioceramics can be obtained for ~ 94.8% theoretical density and 11.38 ± 1.72 MPa, respectively. In addition, the in vivo results demonstrated that the hADSC + HG + 0.5AFnSi/3D β-TCP of the bilayer osteochondral graft showed a much better osteochondral defect repair outcome in a rabbit model. The other word, the subchondral bone scaffold of 3D β-TCP bioceramic could accelerate the bone formation and integration with the adjacent host cancellous tissue at 12 weeks after surgery. And then, a thicker cartilage layer with a smooth surface and uniformly aligned chondrocytes were observed by providing enough steady mechanical support of the 3D β-TCP bioceramic scaffold. © 2023, The Author(s).

关键词： Bioceramic scaffold Digital light processing Gelatin methacryloyl Hyaluronic acid methacryloyl Osteochondral Tissue engineering

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