The Family of Multiparameter Quaternary Subdivision Schemes by Ghulam Mustafa, Muhammad Asghar, Shafqat Ali, Arzoo Qamar, Jia-Bao Liu

“…In this paper, we propose a simple and generalized formula for a family of multiparameter quaternary subdivision schemes. The conditions for convergence of subdivision schemes are also presented. …”
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Development of Ternary and Quaternary Catalysts for the Electrooxidation of Glycerol by L. M. Artem, D. M. Santos, A. R. De Andrade, K. B. Kokoh, J. Ribeiro

“…The CV and CA data reveal that quaternary catalysts present the highest current density for the electrooxidation of glycerol.…”
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Laccase cataylzed synthesis of quaternary malononitriles with an aryl substituent by Parisa Amani, Mansour Shahedi, Elaheh Rezaei, Zohreh Habibi

“…Synthesis of quaternary malononitriles with an aryl substituent is of great importance because these scaffolds serve as essential intermediates in the synthesis of bioactive compounds. …”
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Quaternary Segmentation Characteristics of the Hunhe Fault, Northeast China by Bo Wan, Guanghao Ha, Xiaohui Zhao, Rui Suo

“…Some segments show evidence of late Quaternary activity, contradicting prior research that classified the Hunhe fault as an active fault during the MIS (Marine Isotope Stages) 20-103MIS 20-103- MIS6-19MIS6-19 period and assessed its seismic potential differently. …”
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Antimicrobial Polyethylene through Melt Compounding with Quaternary Ammonium Salts by Fernanda F. Rossetti, Konstantin Siegmann, Joachim Köser, Irene Wegner, Ismail Keskin, Götz Schlotterbeck, Martin Winkler

“…Contact angle measurements and fluorescein binding assays showed the presence of quaternary ammonium groups at the surface. After storing the samples in 50°C warm water for 30 days, several were still antimicrobially active. …”
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Quaternary tracking of the Basin changes (Case Study: Ghezel Ozan) by Hassan Jafari, Fatemeh Bakhtiyari

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Investigation of the effects and evidence of late Quaternary glaciers on the Binaloud Heights by Abolghasem Amir Ahmadi, Leila Goli Mokhtari, Naemi Tebar Mahnaz

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Fossil Tiger Beetles (Coleoptera: Cicindelidae): Review and New Quaternary Records by Christopher D. Nagano, Scott E. Miller, Alan V. Morgan

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The Influence of Interfering Substances on the Antimicrobial Activity of Selected Quaternary Ammonium Compounds by Paula A. Araújo, Madalena Lemos, Filipe Mergulhão, Luís Melo, Manuel Simões

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Preparation of quaternary ammonium-modified silica and its adsorption of vanadium(V) by ZHANG Cuihong, WANG Jing, WANG Jie, YUAN Wenjiao

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Elevated concentrations of quaternary ammonium compounds in childcare centers: A pilot study by Yao Cheng, Zhong Lv, Erika Schreder, Min Hu, Abby Mutic, Guomao Zheng, Amina Salamova

Subjects: “…Quaternary ammonium compounds (QACs)…”
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Plio–Quaternary Tectonic Activity in the Northern Nubian Belts: The Main Driving Forces by Enzo Mantovani, Marcello Viti, Daniele Babbucci, Caterina Tamburelli

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Synthesis and Interface Activity of a Series of Carboxylic Quaternary Ammonium Surfactants in Hydraulic Fracturing by Shixin Dai, Yufei Gong, Feng Wang, Pan Hu

“…To further explore the anion effect of quaternary ammonium cationic surfactants on their relative performances, four fatty acid surfactants were prepared (cetyltrimethylammonium acetate (CTAAC), cetyltrimethylammonium butyrate (CTABU), cetyltrimethylammonium hexanoate (CTAHE), and cetyltrimethylammonium caprylate (CTACA)). …”
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Quaternary Large Mammals from the Granada Geopark: A Magnificent Record with Examples of Geoconservation. by Alfonso Arribas Herrera, Guiomar Garrido Álvarez, José Antonio Garrido García, Francisco Juan García Tortosa, Cristobal Medialdea Pérez

Subjects: “…quaternary…”
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Quaternary Neural Belief Propagation Decoding of Quantum LDPC Codes With Overcomplete Check Matrices by Sisi Miao, Alexander Schnerring, Haizheng Li, Laurent Schmalen

“…Then, we extend the neural BP (NBP) decoder, which was originally studied for suboptimal binary BP decoding of QLPDC codes, to quaternary BP decoders. Numerical simulation results demonstrate that both approaches as well as their combination yield a low-latency, high-performance decoder for several short to moderate length QLDPC codes.…”
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In Vitro Cytotoxicity of Fluorinated Quaternary Ammonium Salts in Colorectal Cancer Cells and In Silico Pharmacology by Adriana Milena Olarte Aponte, Victoria Ospina, Sergio A. Pulido, Luz Amalia Ríos-Vásquez, Luz Adriana Betancur Jaramillo, Carlos Mario Muñetón Peña, Rogelio Ocampo-Cardona, Sara M. Robledo

“…This study evaluated the cytotoxicity of fluorinated quaternary ammonium salts (FQAS) library in CRC-derived cell lines with premetastatic and metastatic phenotypes. …”
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Stable isotope ecology of Quaternary cervid and bovid species in Southeast Asia with implications for wildlife conservation by Sanah Shaikh, Hervé Bocherens, Kantapon Suraprasit

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Linear Complexity of a New Class of Quaternary Generalized Cyclotomic Sequence with Period 2pm by Pinhui Ke, Yan Zhong, Shengyuan Zhang

“…In this paper, based on the theory of generalized cyclotomy, new classes of quaternary generalized cyclotomic sequences with order 4 and period 2pm are constructed. …”
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The Cause of Drop of the Water Level of Underground Quaternary Aquifer of a Mine under Mining Influence by Xianghong Liu

“…Specific to a sharp drop in Quaternary aquifer of the second west mining area of the test mine, the cause was analyzed based on site geological conditions and using hydrogeochemistry and geologic modeling method to ensure high yield and high efficiency of mine and provide references for production safety of mines of the same kind.…”
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Simultaneous optimization on biolubricants obtained through a quaternary mixture of vegetable oils: application of the desirability function by Maria Flávia Rodrigues Starling Araujo, Vânya Márcia Duarte Pasa, Camila Nunes Costa Corgozinho

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