Effect of synthesized temperature on the assembly and properties of four lanthanide supramolecular frameworks

Luo, Yingying; Wan, J.; Xiong, Ying; Lu, Lijun; Wang, G. L.; Ling, Xin-Yu; Hu, Yingli; Chen, Q. Y.; Pan, Yao

doi:10.4314/bcse.v33i1.11

Cited by 3 publications

(5 citation statements)

References 24 publications

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“…Nitrous oxide produced by treating animal manure slurry is another important source of GHGs. Previous experimental results have shown the effect of the slurry temperature on the global emissions of N 2 O [50] and concluded that an increase in temperature could accelerate N 2 O production in the temperature range of 15-35 • C, while reductions in emissions are practically non-existent at lower temperature values (Figure 4).…”

Section: • N 2 O Emissionsmentioning

confidence: 92%

Geothermal Heat Pumps for Slurry Cooling and Farm Heating: Impact and Carbon Footprint Reduction in Pig Farms

Blázquez

Borge-Díez²,

Nieto³

et al. 2023

Green Energy and Technology

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Section: • N 2 O Emissionsmentioning

confidence: 92%

Geothermal Heat Pumps for Slurry Cooling and Farm Heating: Impact and Carbon Footprint Reduction in Pig Farms

Blázquez

Borge-Díez²,

Nieto³

et al. 2023

Green Energy and Technology

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“…[84] Pyrolysis at 1600 °C created Ta 4 HfC 5 nanocrystallites of %21 nm, encapsulated by an amorphous C layer. [84] A solution-based process can mix the starting materials at a fine scale. Therefore, synthesis temperature can be reduced since long-distance atomic diffusion is not demanded.…”

Section: Transition Metal Carbidesmentioning

confidence: 99%

“…[50b,51] Solid-solution silicon carbide Atomic-level homogeneity, higher yield, lower ceramic conversion temperature than for pure SiC, inhibited β-SiC crystal growth, and improved densification 84%-89% ceramic yield, [4b,62] ceramic conversion completes at 800 °C. [62] Transition metal carbides Atomic-level homogeneity, lower ceramic conversion temperature than for pure SiC, pseudopolymer-derived carbide when using simple organic species, residual oxygen, and improved ceramic yield; C preform, carbide particles, or precursor infiltration may be used 45-75% yield, [89] 1.6 wt% residual C, [89] polymer conversion to amorphous carbides at <900 °C, [69,70] carbide crystallization at >1000 °C, [71,77,80,81,[83][84][85]93,97] crystal size varies from single nanometer to a few hundred nanometers. [70,89,97,98] Borides Constrained grain growth, metal sources can be oxide or salt based 86-90% yield, [101,102] pyrolysis at >1400 °C leads to borides.…”

Section: Materials Characteristics Specificsmentioning

confidence: 99%

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Polymer‐Derived High‐Temperature Nonoxide Materials: A Review

Zhou

2023

Adv Eng Mater

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The synthesis of polymer-derived nonoxide materials such as carbides, borides, and nitrides started in the 1970s and slowly progressed into the 1980s, with silicon carbide (SiC) fibers as the prime examples. [1] In the 1990s, the research activities in this area became more intensive, with multiple efforts devoted to understanding the polymer-to-ceramic conversion mechanisms, resulting microstructures, and mechanical properties. In the 2000s, relying on the liquid precursor nature and advancement in chemistry, new techniques (e.g., electrospinning, coating, and precursor infiltration) and new precursors were introduced. Understanding of the crosslinking and thermal conversion process was improved. For example, SiC fibers were improved from amorphous silicon oxycarbide (SiOC) to low-oxygen SiC fibers and then to near-stoichiometric SiC fibers. SiC thin films of 8-190 μm thickness were reported in 2009. [2] These films can stand alone, and high mechanical properties and optoelectronic properties were achieved. Because of these advantages, they were proposed to be used in microelectromechanical systems (MEMS) and optoelectronic devices. In recent decades, additive manufacturing was used to form complex shapes. [3] Also, different one-pot precursor synthesis approaches were reported. [4] The pyrolyzed ceramic systems were frequently used in a powder format and can be further processed with traditional forming processes such as spark plasma sintering, hot pressing, thermal treatment, etc. [5,6] The advantages of using the polymerderived approach for such high-temperature nonoxide material formations involve several aspects. Compositions can be designed based on molecular-level interactions and conversion of polymeric precursors to composites. Through a synergistic selection and combination of polymer molecules of different architectures and additives, a large family of functional, structural, resilient, and versatile materials can be created. Pyrolysis conditions can also be varied to create different property systems. Species intermixing can be achieved at the true atomic level. It enables functional properties for inert systems and harsh environmental stability for far-from-equilibrium conditions. Additional advantages include low processing temperature (such as a few hundred degrees Celsius lower) and versatile shape achievement. The final materials can be fibers, coatings, membranes, powders, bulk parts, porous forms, infiltrating phases, and complex 3D-printed shapes, [3a] among others. Using the polymer-derived approach to form high-temperature ceramics also enables composition homogeneity and purity, thanks to the uniform mixing of different precursors and additives and high-purity chemical precursors. It can also create compositions that may be impossible with conventional routes, [7] such as sintering.The common challenges are as follows. Polymer-derived nonoxide composites are in a metastable state. At high temperatures, the composition and microstructure can continue to evolve and

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“…Além disso, o complexo ATG5-ATG12-ATG16L funciona como uma enzima semelhante a E3, determinando o local de lipidação de LC3 (18). A LC3 II também interage diretamente com a sequestossomo 1 (Sqstm1/p62), proteína que marca quem deve ser envolto pelo autofagossoma e degradado por autofagia (7,11,12,(19)(20)(21)(22). As ações dos microtúbulos garantem o transporte preciso do autofagossomo ao lisossoma para fusão (23).…”

Section: Via Da Autofagiaunclassified

Mecanismos moleculares relacionados ao aumento do conteúdo hepático de gordura em resposta ao excesso de exercício físico

Pinto¹

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O exercício excêntrico excessivo levou ao acúmulo de gordura hepática, o que ocorreu concomitantemente com a elevação das principais proteínas do complexo 1 do alvo da rapamicina em mamíferos (mTORC1) e da via de sinalização da insulina. Uma vez que a mTORC1 e a insulina podem inibir a via da autofagia e explicar a elevação do conteúdo de lipídio no fígado, o principal objetivo da presente investigação foi verificar a resposta dos genes e proteínas relacionados as vias da autofagia e lipogênese no tecido hepático de camundongos submetidos ao protocolo de corrida excessivo em declive com e sem a administração de rapamicina, uma droga que inibe a via da mTORC1. Camundongos C57BL/6 foram divididos em quatro grupos experimentais: Controle (CT; sedentário), Excesso de exercício físico em declive (EE), Excesso de exercício físico em declive com administração crônica de rapamicina (EE/Rapa) e Endurance (END). Ao final do protocolo de 8 semanas de exercício, o sangue e o fígado foram coletados para análise sérica, histologia, imunohistoquímica, conteúdo de gordura hepática, reação em cadeia da polimerase em tempo real e immunoblotting. Os principais resultados foram: 1) elevação dos níveis de glicose, insulina, HOMA-IR, cortisol, ALT e colesterol, mas níveis mais baixos de T4 para o grupo EE/Rapa; 2) acúmulo de gordura hepática para os grupos EE e EE/Rapa; 3) aumento de LC3 por imunoexpressão e diminuição dos genes autofágicos para os grupos EE, EE/Rapa e END; 4) redução da fosforilação de p70S6K e aumento da fosforilação de Foxo1A para o grupo EE/Rapa. Em resumo, o exercício excessivo com ou sem rapamicina levou ao aumento do conteúdo de gordura no fígado. Embora a rapamicina tenha sido eficaz na inibição de mTOR, a via da autofagia não foi regulada positivamente.

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Effect of synthesized temperature on the assembly and properties of four lanthanide supramolecular frameworks

Cited by 3 publications

References 24 publications

Geothermal Heat Pumps for Slurry Cooling and Farm Heating: Impact and Carbon Footprint Reduction in Pig Farms

Geothermal Heat Pumps for Slurry Cooling and Farm Heating: Impact and Carbon Footprint Reduction in Pig Farms

Polymer‐Derived High‐Temperature Nonoxide Materials: A Review

Mecanismos moleculares relacionados ao aumento do conteúdo hepático de gordura em resposta ao excesso de exercício físico

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