On the cusp forms of mixed type by Edmundas Gaigalas

“… The base of the space of cusp forms of type (−10, 17, χ) is constructed in the form of the generalized quaternary theta series. …”
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Modification of corncob-derived cellulose using Hexadecyltrimethylammonium Bromide and Propylene Carbonate by Ng Yee Shui, Ooi Zhong Xian, Teoh Yi Peng, Ooi Mei Lee

“…According to the FTIR spectrum, there was an extra peak at 1780 cm-1 which belongs to C=O groups and an increase in intensity at 1000–1300 cm-1 which belongs to CN stretching of the quaternary ammonium group. SEM images and zeta potential results supported the quaternary ammonium group was successfully grafted on isolated corn cob cellulose, which are essential for initiating photocatalytic reactions.…”
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Geotourism study of Ghezelowzan basin based on Fassoulas method by Hassan Jafari, mohammad taherkhani, Khadijeh Rezaii

“…The catchment area of the Ghezelowzan is a landform of various quaternary processes that are changing. Identification of geosite plays an important role in explaining quaternary developments. …”
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THE LAKES OF THE ROMANIAN BLACK SEA COAST. MAN-INDUCED CHANGES, WATER REGIME, PRESENT STATE by PETRE GÂŞTESCU, PETRE BREŢCAN, DACIAN CONSTANTIN TEODORESCU

“…This characteristic/position is the result of paleogeographical evolution in the Quaternary and the current climatic conditions in Dobrogea. …”
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A decoding scheme for the 4-ary lexicodes with D=3 by D. G. Kim, H. K. Kim

“…We introduce the algorithms for basis and decoding of quaternary lexicographic codes with minimum distance d=3 for an arbitrary length n.…”
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Hydrochemical Characteristics and Formation of the Madeng Hot Spring in Yunnan, China by Ren Zhenhua, Zhou Xun, Yang Miaolin, Wang Xiaocui, Zheng Yuhui, Li Xiaolu, Shen Ye

“…The Madeng hot spring emerges in the central river valley in the northeastern Lanping Basin in Jianchuan county of Yunnan Province in China. Quaternary sand and gravel occur in the valley which is underlain by the red beds consisting of sandstone and mudstone. …”
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Groundwater-Mixing Mechanism in a Multiaquifer System Based on Isotopic Tracing Theory: A Case Study in a Coal Mine District, China by Pinghua Huang, Xinyi Wang

“…Groundwater from the Quaternary aquifer is supplied by “modern” rainfall. …”
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Promotion mechanism of hydroxyl groups in catalyzing CO2 cycloaddition by Yiming Wang, Wensheng Wei, Yuxin Wang, Guangwen Xu, Jinggang Zhao, Lei Shi

“…In this study, a series of hydroxy-functionalized quaternary ammonium salt catalysts, i.e., NEt3(HE)Br, NEt2(HE)2Br, NEt1(HE)3Br, and N(HE)4Br, were successfully prepared by quantitatively grafting hydrogen-bond donors (HBDs) as electrophilic sites on quaternary ammonium salts and then used to catalyze the cycloaddition of propylene oxide (PO) and carbon dioxide (CO2). …”
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A local meteoric water line for interior Alaska constrains paleoclimate from 40 000 year old relict permafrost by Thomas A Douglas, Amanda J Barker, Alistair J Monteath, Duane G Froese

“…Information from past warming events provides long-term perspectives for future trajectories; however, late Quaternary seasonal temperatures are poorly constrained. …”
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Effect of Weathering on Cd Mobilization in Different Sedimentary Bedrock Soils by Yongqiang Ning, Minglong Yang, Chutong Liu, Jiazhong Huang, Tianyi Wang, Yong Pang, Quanheng Li

“…Herein, we endeavored to explore the contribution of various sedimentary rocks (Quaternary sediments, mudstone, limestone, sandstone, shale, greywacke, and marl) under similar weathering conditions to the input of Cd in agricultural soils. …”
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Regional Soil Patterns as Indicators of Late Cenozoic Change in the Critical Zone: A Baseline Synthesis for the Landscapes of Peninsular India by Yanni Gunnell, Nicolas Durand, Shanti Pappu

“…Colluvial and alluvial soils, including widespread Vertisols, are used as tools for detecting and mapping different generations of Quaternary flood deposits: fluvial terraces, coastal fan-deltas, and shallow upland palaeolakes. …”
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Les pratiques enseignantes mises en récit by Jean-François Marcel

“…The article also analyzes the epistemological foundations of this method through a theoretical clarification of “teacher practices”, which in connection with the work of OPEN, leads to a quaternary model and clarifies research orientations and standpoints in connection with the researcher’s engagement.…”
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2,6-Diamino-1--methylpyrimidine as new fluorescent probe for palladium(II) determination using hyphenated technique by Olesya Volovenko, Tetiana Keda, Natalia Skreminska, Demyd Milokhov, Olga Khilya, Olga Zaporozhets

“…The procedure was based on preliminary solid-phase extraction of [PdCl 4 ] 2− onto silica modified with quaternary ammonium salts, with the subsequent elution from the surface by 2,6-diamino-1- N -methylpyrimidine solution and measurement of the fluorescence intensity. …”
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Synthesis of N-Methylmorpholinium Derivatives Possessing a 1,3,4-Oxadiazole Core as Feasible Antibacterial Agents against Plant Bacterial Diseases by Xinxin Tuo, Jie Yang, Yedong Zhang, Peiyi Wang

“…To develop a kind of quaternary ammonium compounds that can safely apply in agriculture for managing the plant bacterial diseases, herein, a series of N-methylmorpholinium derivatives possessing a classical 1,3,4-oxadiazole core were prepared and the antibacterial activities both in vitro and in vivo were screened. …”
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Mapping of Agate-like Soil Cover Structures Based on a Multitemporal Soil Line Using Neural Network Filtering of Remote Sensing Data by Dmitry I. Rukhovich, Polina V. Koroleva, Alexey D. Rukhovich, Mikhail A. Komissarov

“…ASCSs are formed on Quaternary sediments of varying thickness from 0.3 to 6 m, underlain by carbonate and red sediments of the Permian period. …”
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The Research and Mechanism of Extracting Vitamin B6 Using Aqueous Two-Phase Systems by Changyu Lu, Luning Gao, Aibing Chen, Duo Li, Yahong Zhou

“…For this purpose, phase diagrams and liquid-liquid equilibrium (LLE) data of the investigated quaternary systems were experimentally determined at 308.15, 318.15, and 328.15 K. …”
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Preparation and characterization of graphene oxide-based cation, chelating, and anion exchangers for salt removal by Mahmoud A. Al Azwani, Saleh Al Busafi, El-Said I. El-Shafey

“…X-ray photon spectroscopy (XPS) showed the presence of -SO3 and S-O on GOT, amine on GOP, and quaternary ammonium group (-NHR2+) on GOQ. TGA shows that GO functionalization is covalent. …”
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Adsorption of Oleate Anions on to Cationized Lignocelluloses by H. Zghida, M.H.V. Baouab, R. Gauthier

“…Four lignocellulosic materials modified by grafting quaternary ammonium groups have been tested for the adsorption of the oleate anion from aqueous solutions, viz. cotton fibres, viscose fabric, wood sawdust and maize cob powder. …”
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European UNESCO Geoparks: Introduction to Part II by Michael Benton

“…The second set of 36 articles in this Part cover the long span of geological time from the Triassic to the Quaternary, arranged in chronostratigraphic order. These document some of the most important stages in the history of life, especially focusing on life after the end-Permian mass extinction, as marine and terrestrial ecosystems rebuilt, and the ‘modern-style’ faunas and floras emerged.…”
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Microstructure and grain refining performance of Ce on A380 alloy by Vončina M., Mrvar P., Petrič M., Medved J.

“…Furthermore Ce phase was detected indicating quaternary phase AlCeCuSi (Al9Ce2Cu5Si3).…”
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