Results 61 to 70 of about 2,259 (140)

Estudo do uso de eteno verde ou fóssil na síntese de pead e pelbd nominalmente iguais: há diferença efetiva entre esses materiais? / Study on the use of green or fossil ethene in the synthesis of hdpe and pelbd nominally equal: is there an effective difference between these materials?

, 2020
Neste trabalho, polietilenos fósseis e verdes nominalmente iguais, produzidos pela empresa Braskem, foram analisados com o objetivo de avaliar se mesmo apresentando mesmos índices de fluidez, densidades, propriedades mecânicas e térmicas iguais, a ...
Filho, Marco Aurélio da Silva Carvalho, Sahagun, Thais Helena Sydenstricker Flores-, Gonzalez, Ricardo Manríquez, Maria, Luiz Claudio de Santa, Hellvig, Eliana Leal, Ramirez, Maria Guadalupe Lomeli, Tanobe, Valcineide Oliveira de Andrade   +6 more
core  

Two Routes to Land: Genomic Underpinnings of Parallel Aerial Egg Deposition in Aquatic Old‐World Pila and New‐World Pomacea (Ampullariidae)

Advanced Science, EarlyView.
Comparative genomics of Gondwana‐diverged Pila and Pomacea reveals parallel evolution of aerial oviposition. Convergent chromosomal rearrangements reshape regulatory landscapes within topologically associating domains. Lineage‐specific gene family expansions and viral‐derived perivitelline proteins (PV1) underpin desiccation resistance.
Yufei Zhou, Huawei Mu, Xueying Nie, Yue Gao, Hui Wang, Ling Fang, Tiangang Luan, Monthon Ganmanee, Jian‐Wen Qiu, Jin Sun, Jack Chi‐Ho Ip   +10 more
wiley   +1 more source

Hydrogen (H2) Recovery From Hydrogen Sulfide (H2S): Current Technologies, Challenges, and Future Outlook

Advanced Science, EarlyView.
ABSTRACT Hydrogen sulfide (H2S) can be transformed into hydrogen (H2) through several chemical and catalytic processes, offering a promising route for both waste treatment and clean H2 production. This colorless, flammable, and toxic gas is found abundantly in swamps, volcanoes, hot springs, sewages, other natural gas fields, and even in refineries and
Divyesh Cirikonda, Astrid Campos‐Mata, Sehmus Ozden, Shreyasi Chattopadhyay, Pulickel M. Ajayan   +4 more
wiley   +1 more source

“Back to Plastic!”: A presença fóssil-fascista em declarações do governo Trump (2025)

The general objective of this work is to analyze the recent statements and positions of the US President, Donald Trump, and its relations with the fossil-fascist modus operandi, along the lines proposed by Andreas Malm (2021).
Pereira Madureira, Carolina, Lira de Menezes, Lucas   +1 more
core   +1 more source

Synergistic Spin‐Polarization and Single‐Atom Engineering in Magnetic Heterojunctions for Efficient Solar Water Splitting

Advanced Science, EarlyView.
High‐throughput screening led to the identification of 67 Z‐scheme heterojunctions (comprising 2D magnetic transition metal halides and non‐magnetic transition metal chalcogenides). For CrI3/MoTe2 and CrI3/WTe2, electronic structure analysis demonstrated that synergistic crystallographic point group and built‐in electric field effects generate a ...
Hongyang Ren, Zhenzhou Guo, Huirong Wu, Peilin Huang, Jie Yang, Jie Zhang, Guangqian Ding, Hongkuan Yuan, Biao Wang   +8 more
wiley   +1 more source

Extração de metais em rejeitos de mineração de carvão fóssil através de lixiviação ácida assistida por ultrassom [PDF]

, 2018
O beneficiamento do carvão fóssil é um processo que gera grande volume de rejeitos com cerca de 50% do carvão bruto extraído, no Brasil, descartado. Sendo assim, ressalta-se a importância do desenvolvimento de técnicas de reaproveitamento destes resíduos,
Baum, Caroline Isabel
core  

MetalCenter‐Dependent Selectivity Divergence in MN4 Single‐Atom Catalysts for Aerobic HMF Oxidation

Advanced Science, EarlyView.
Two single‐atom catalysts with M‐N4 configurations (FeN4 and CoN4) were developed for selective HMF oxidation. FeN4 achieves 93.9% selectivity toward FFCA via superoxide anions (O2•−), while CoN4 preferentially produces FDCA through hydroxyl radicals (•OH). DFT calculations reveal that distinct adsorption energies and charge redistribution at the metal
Haoyu Wang, Zhilong Ye, Weihao Wang, Zhi Hu, Qing Tian, Jie Gao, Lianbing Zhang   +6 more
wiley   +1 more source

Dynamic Etching‐Induced Cl‐Terminated Ti3C2Clx/Ti3ZnC2 Heterostructure for Ammonia Electrosynthesis and Zinc‐Nitrogen Batteries

Advanced Science, EarlyView.
A stable Ti3C2Clx/Ti3ZnC2 heterostructure, fabricated by dynamic etching, exhibits outstanding electrocatalytic NRR activity (NH3 yield: 20.1 µg h−1 mg−1, FE: 38.1%) in alkaline media. The corresponding Zn‐N2 battery achieves a peak power density of 36.5 µW cm−2 and an NH3 yield of 13.1 µg h−1 mg−1, providing an advanced strategy for NH3 and ...
Yu Wang, Ying Sun, Liqun Ye, Jichi Liu, Hui Li, Yang Fu, Fengzhan Sun, Jieshan Qiu, Chang Yu, Tianyi Ma   +9 more
wiley   +1 more source

Integrating Machine Learning With Constant‐Potential Simulation to Unravel Charge‐Transfer Mechanisms in Electrochemical Nitrogen Fixation

Advanced Science, EarlyView.
Integrating interpretable machine learning with the fixed‐potential method reveals a novel mechanism: the catalytic activity of the electrochemical nitrogen reduction reaction is governed by partial charge transfer, induced by variations in the intermediate potential of zero charge under constant potential.
Yufei Xue, Dushuo Feng, Yuefei Zhang, Yang Zhang, Yalong Jiao, Aijun Du, Guoping Gao   +6 more
wiley   +1 more source

Consumo de combustíveis de origem fóssil e a certificação na produção de maçãs no Brasil

, 2010
Os consumidores estão cada vez mais exigentes com a segurança alimentar; as empresas de maçãs buscam as certificações e melhorias nos processos produtivos.
Guindani, Roberto Ari
core   +2 more sources