Results 61 to 70 of about 13,543 (218)

Desulfurization of Benzothiophene Derivatives by Solvent Extraction Coupled With Oxidation Using Oxomolybdenum(VI) Bis(pyrazolyl)methane Catalysts

European Journal of Inorganic Chemistry, EarlyView.
A polymeric hybrid material formulated as [MoO3(bis(pyrazolyl)methane)] has been prepared and used as a catalyst precursor for the complete oxidative desulfurization of a model diesel containing recalcitrant benzothiophene derivatives. The precursor is converted in situ to an oxodiperoxo active species which is retained in the recyclable extractant ...
Ana C. Gomes, Fátima Mirante, Isabel S. Gonçalves, Martyn Pillinger, Salete S. Balula   +4 more
wiley   +1 more source

Números híbridos de Mersenne

CQD Revista Eletrônica Paulista de Matemática, 2020
Exibimos no presente trabalho um estudo sobre os números híbridos de Mersenne, a partir do que já foi estudado sobre os números híbridos como: definição, propriedades e teoremas relacionados.
Milena Carolina dos Santos Mangueira, Francisco Régis Vieira Alves, Paula Maria Machado Cruz Catarino   +2 more
doaj  

Hypervalent Iodine‐Mediated Synthesis of Sulfones Using Organozinc Pivalates and Sulfinate Salts

European Journal of Organic Chemistry, EarlyView.
A general protocol for sulfone synthesis via sulfonyl‐containing hypervalent iodine reagents and organozinc pivalates is described. The method is practical, provides a broad scope of sulfone in moderate to high yield. bicyclo[1.1.1]pentane‐sulfones are also disclosed and a one‐pot synthesis of Diels–Alder adduct is presented. Sulfones are key motifs in
José C. Cunha, Gabriel G. Rocha, Fábio M. F. Santos, Stefan Bräse, M. Manuel B. Marques   +4 more
wiley   +1 more source

Biomass‐derived hydrochars as eco‐friendly adsorbents for wastewater treatment applications

Environmental Progress &Sustainable Energy, EarlyView.
Abstract Emerging organic pollutants (EOPs), such as diethyl phthalate (DEP), bisphenol A (BPA), and methylene blue (MB), are only partially removed in conventional wastewater treatment plants. This study assesses hydrochars produced by hydrothermal carbonization (HTC) of spruce bark (SB), vine shoots (VSs), and wheat straw (WSs) for removing three ...
Emanuel Gheorghita Armanu, Sara Ribeirinho‐Soares, Christian Eberlein, Hermann J. Heipieper, Irina Volf, Olga C. Nunes, Olívia Salomé G. P. Soares   +6 more
wiley   +1 more source

Mechanical Behaviour of Vacuum‐Infused GFRP Composites at Elevated Temperatures—Influence of Fibre Architecture

Fire and Materials, EarlyView.
ABSTRACT This study addresses the influence of fibre architecture on the mechanical properties of vacuum‐infused glass fibre reinforced polymer (GFRP) composites at elevated temperatures (ET). Laminates with three different fibre configurations—unidirectional (UD), bidirectional 0°/90° cross‐ply (BD), and ±45° off‐axis angle‐ply (OA) – were tested in ...
Eloísa Castilho, João P. Firmo, Mário Garrido, João R. Correia, Afonso Ataíde   +4 more
wiley   +1 more source

Um estudo dos números hiperbólicos de Jacobsthal-Lucas

CQD Revista Eletrônica Paulista de Matemática, 2021
No trabalho em questão, apresentamos um tipo de sequência relacionada à sequência de Jacobsthal-Lucas, fundamentada nas sequências de Jacobsthal e de Lucas. Nesse sentido, evidenciamos a sequência hiperbólica de Jacobsthal-Lucas.
Renata Passos Machado Vieira, Thamires Silva Aquino de Souza, Francisco Regis Vieira Alves, Paula Maria Machado Cruz Catarino   +3 more
doaj  

A Deep Learning Framework for Forecasting Medium‐Term Covariance in Multiasset Portfolios

Journal of Forecasting, EarlyView.
ABSTRACT Forecasting the covariance matrix of asset returns is central to portfolio construction, risk management, and asset pricing. However, most existing models struggle at medium‐term horizons, several weeks to months, where shifting market regimes and slower dynamics prevail.
Pedro Reis, Ana Paula Serra, João Gama
wiley   +1 more source

Green Human Resource Management and ISO 14001: Toward Environmental Sustainability in Organizations

Human Resource Development Quarterly, EarlyView.
ABSTRACT The current climate change scenario imposes urgent challenges to different economic sectors around the world, requiring companies to adopt new strategies to achieve sustainable development goals (SDGs) while enhancing environmental awareness.
Eduardo Ortega, Arnaldo Coelho, Neuza Ribeiro   +2 more
wiley   +1 more source

Sobre o modelo de Fibonacci na variável complexa: identidades generalizadas

CQD Revista Eletrônica Paulista de Matemática, 2017
A sequência emblemática relacionada com o problema da reprodução de pares de coelhos, propugnado por Leonardo Pisano, em 1202, se tornou, passados alguns séculos, o objeto de estudo e pesquisa em determinados ramos particulares da Matemática, sobretudo ...
Francisco Regis Vieira Alves, Rannyelly Rodrigues de Oliveira   +1 more
doaj  

Screening anticancer peptides performance in organotypic prostate tumor‐stroma 3D models

International Journal of Cancer, EarlyView.
What's New? Peptide‐based drugs have emerged as promising anticancer therapies for their potential to disrupt protein–protein interactions. In this study, the authors developed a physiomimetic human 3D prostate cancer spheroid model to assess the efficacy of the CAVPENET peptide in inhibiting tumor growth. Upon incubation with CAVPENET, prostate cancer
Bárbara Matos, Maria V. Monteiro, Matilde R. Lagarto, John Howl, Carmen Jerónimo, Vítor M. Gaspar, João F. Mano, Margarida Fardilha   +7 more
wiley   +1 more source