Results 11 to 20 of about 4,522 (119)

Evaluating the Limitations of One-Dimensional High-Temperature Gas Chromatography - FID for Wax Solution Analysis: A Systematic Study. [PDF]

J Sep Sci
ABSTRACT Wax deposition in petroleum systems is intrinsically connected with paraffin wax composition, yet their quantitative characterization by one‐dimensional high‐temperature gas chromatography with flame ionization detection (HTGC–FID), as prescribed by ASTM D5442, remains challenging.
Okasaki FB, Pinheiro IF, Bizarre L, Guersoni VCB.   +3 more
europepmc   +2 more sources

Chromatographic Profiling of Artisanal Chocolates: Volatile Composition and Methylxanthines as Markers of Cocoa Content. [PDF]

J Food Sci
ABSTRACT The increasing demand for artisanal chocolates highlights the importance of reliable analytical strategies for quality assurance and product authentication. In this study, 45 Brazilian artisanal chocolates (36%–100% cocoa) were characterized by integrated chromatographic and chemometric analyses. Seventeen representative samples were evaluated
Altissimo J, Cardoso I, Araújo BQ, Pereira AR, Almeida JVM, Santos NAD, Costa VC, Carneiro Lima MTWD.   +7 more
europepmc   +2 more sources

Determination of Monoethylene Glycol in Gas Condensate Samples by Microchip Micellar Electrokinetic Chromatography Integrated With Capacitively Coupled Contactless Conductivity Detection

ELECTROPHORESIS, EarlyView.
ABSTRACT This study describes the use of microchip micellar electrokinetic chromatography (MEKC) integrated with capacitively coupled contactless conductivity detection (C4D) for the determination of monoethylene glycol (MEG) in gas condensate samples.
Maurício M. L. Pereira, Kariolanda C. A. Rezende, Iris Medeiros Junior, Bruno Charles do Couto, Rogerio M. Carvalho, Claudimir L. do Lago, Wendell K. T. Coltro   +6 more
wiley   +1 more source

Microemulsion‐Based Drilling Fluids Incorporating Seashell Residue Powder: A Sustainable Approach to Fluid Loss Control

Journal of Surfactants and Detergents, EarlyView.
Two microemulsion‐based drilling fluids incorporating SSRP were formulated using pine oil, the nonionic surfactant Alkonat L100W, and a glycerol/water solution. The results provide valuable insights into how surfactant‐assisted microemulsion systems can be engineered to enhance the performance and eco‐efficiency of drilling fluids.
Luara Ribeiro Viana, Raphael Ribeiro da Silva, João Pedro Gonçalves de Souza Soares, José Cavalcante de Queiroz Neto, Maria Eduarda Araújo Pessoa, Rafael Peixoto Alves, Fabiola Dias da Silva Curbelo   +6 more
wiley   +1 more source

A Bibliometric‐Based Review of Biochar for Salt‐Affected Soil Restoration: Mapping Research Trends and Future Directions

Land Degradation &Development, EarlyView.
ABSTRACT In recent years, biochar has been studied for its range of applications. Recognized by the IPCC as a key Carbon Dioxide Removal (CDR) strategy, it also stands out as an important tool for reclaiming degraded lands, including vast global areas affected by salinity, such as those in China, India, and Australia.
Juciane Vieira de Assis Freire, Darliane Cristina Soares de Souza, Larissa Fernandes da Silva, Poliana Pinheiro da Silva, Thiago Henrique Freire de Oliveira, Eulene Francisco da Silva, Bruno Caio Chaves Fernandes, Adriano Erique de Oliveira Lima, Bárbara Samartini Queiroz Alves, Daniel Valadão Silva, José Cleiton Sousa dos Santos, Frederico Ribeiro do Carmo, Rafael Leandro Fernandes Melo   +12 more
wiley   +1 more source

Assessing the Effects of Biodiesel Production on Sustainability: A Bayesian Two‐Stage Data Envelopment Analysis Approach

Sustainable Development, EarlyView.
ABSTRACT Sustainable development transforms production systems, requiring integrated environmental, social, and economic strategies. Energy systems are key agro‐industrial supply chains in developing countries. Brazil's soybean supply chain impacts Gross Domestic Product, mainly through exports.
Aline Veronese da Silva, Camila Veneo Campos Fonseca, Pedro Gerber Machado, Marcelo Azevedo Costa   +3 more
wiley   +1 more source

An experimental approach to assess the combined effects of multiple stressors on a large vertebrate species

Conservation Biology, EarlyView.
Abstract The design of experiments to investigate the combined effects of multiple stressors requires exposing target organisms to multiple combinations of stressor doses. Concurrent manipulation of stressors is often infeasible with wildlife, but long‐lasting health effects allow individual health to be used as an integrator of prior stressor exposure.
Enrico Pirotta, Catriona M. Harris, Lori H. Schwacke, Len Thomas, Jason B. Allen, Aaron A. Barleycorn, Marco Casoli, Jonathan Crossman, Laura Aichinger Dias, Laura Engleby, Erin LaBrecque, Jenny A. Litz, Katherine A. McHugh, Patrick J. O. Miller, Michael J. Moore, Theoni Photopoulou, Brian M. Quigley, Cynthia R. Smith, Brandon L. Southall, Todd R. Speakman, Ryan Takeshita, Christina N. Toms, Randall S. Wells, Eric S. Zolman, Peter L. Tyack   +24 more
wiley   +1 more source

Structured machine learning modeling to support conservation of deep‐sea benthic biodiversity

Conservation Biology, EarlyView.
Abstract Biodiversity monitoring programs need to deliver accurate, timely, and actionable predictions. To establish a predictive monitoring program for deep‐sea benthos of the Santos Basin, Brazil, we developed a two‐stage structured model that allowed comparison of biodiversity predictions obtained from environmental simulations (2M‐Sim).
Gustavo Fonseca, Danilo C. Vieira, Juliane C. Carneiro, Renato S. Carreira, Milena Ceccopieri, Thais N. Corbisier, Adriana Galindo Dalto, Alberto G. Figueiredo Jr., Fabiane Gallucci, Paula Gheller, Simone Brito de Jesus, Helena Passeri Lavrado, Letícia Lazzari, Eduardo Hilzendeger Marcon, Daniel Leite Moreira, Rafael Bendayan de Moura, Ellen Pape, Ana Cláudia Aoki Santarosa, João Regis dos Santos Filho, Silvia Helena de Mello e Sousa, Thaisa Marques Vicente, Luciana Erika Yaginuma, Cinthia Yamashita, Wandrey Watanabe   +23 more
wiley   +1 more source

Nitrogen compounds removal from oil-derived middle distillates by MIL-101(Cr) and its impact on ULSD production by hydrotreating

Oil & Gas Science and Technology, 2021
Oil-derived middle distillates (straight-run gas oil and mixture with light cycle oil and coker gas oil) for Ultra-Low Sulfur Diesel (ULSD) production by HyDroTreating (HDT) were pretreated by selective Nitrogen Organic Compounds (NOC) adsorption. Highly
Meneses-Ruiz Edith, Escobar José, Mora Rodolfo Juventino, Montoya José Ascención, Barrera María Concepción, Solís-Casados Dora, Escobar-Alarcón Luis, Del Ángel Paz, Laredo Georgina   +8 more
doaj   +1 more source

IMPACTO DEL PETRÓLEO CRUDO EN SUELO SOBRE LA MICROBIOTA DE VIDA LIBRE FIJADORA DE NITRÓGENO

Tropical and Subtropical Agroecosystems, 2011
Los derrames de petróleo afectan las propiedades físicas del suelo y especialmente las poblaciones naturales de microorganismos. En particular causan disminución en bacterias fijadoras de nitrógeno de vida libre, encargadas de asimilar y reciclar nutrientes en los ciclos biogeoquímicos; al alterarse éstos, se afecta la fertilidad del suelo.
Mayra Vázquez-Luna, Araceli Montiel-Flores, Dinorah Vázquez-Luna, Mario F. Herrera-Tenorio   +3 more
openaire   +2 more sources