Showing 1,521 - 1,540 results of 3,087 for search '"nitrogen"', query time: 0.05s Refine Results
  1. 1521

    Hybrid C18-Bonded Silica Phases: Application in Acetaminophen Adsorption by Carolina Feier Pinto, Fernando Silveira, Fernanda C. Stedile, João Henrique Z. dos Santos

    Published 2007-11-01
    “…The solids were characterized by infrared spectroscopy (IR), ultraviolet diffuse reflectance spectroscopy (DRS), atomic force microscopy (AFM), scanning electron microscopy (SEM) and nitrogen adsorption. The behaviour of the phases towards the adsorption of acetaminophen was evaluated. …”
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    Article
  2. 1522

    Polyol-based Synthesis of Praseodymium Oxide Nanoparticles by Caroline Quievryn, Samuel Bernard, Philippe Miele

    Published 2014-03-01
    “…Particles display a BET Specific Surface Area (SSA; 8.75 m² g-1) with a nitrogen adsorption-desorption isotherm of type II and a helium density of powders (d = 5.66 g cm-3).…”
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  3. 1523

    Surface Characterization and Catalytic Activity of Alumina and Alumina-Supported ZnSO Catalysts Prepared from Different Alumina Sources by Farid Sh. Mohamed

    Published 2002-09-01
    “…The alumina and ZnSO 4 -supported samples were characterized by X-ray diffraction (XRD), FT-IR spectroscopy and nitrogen physisorption methods. Dehydration of 1-butanol and the cracking of cumene were undertaken over the prepared samples using a pulse microcatalytic technique. …”
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    Article
  4. 1524

    Analogous Atomic and Electronic Properties between VN and VNCB Defects in Hexagonal Boron Nitride by Chang-Youn Moon, Kee-Suk Hong, Yong-Sung Kim

    Published 2022-01-01
    “…Using first-principles calculations, we find that nitrogen-vacancy defect VN has a lower energy structure in C1h symmetry in 1− charge state than the previously known D3h symmetry structure. …”
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  5. 1525

    Nanoporous Silica from the Spray Reaction of Metal Solution Microdroplets with Silicon Tetrachloride by H. Isobe, Y. Hattori, H. Kanoh, K. Yamamoto, K. Kaneko

    Published 2005-06-01
    “…Nanopore formation in silica, in which nanoparticles of metal compounds were embedded, was studied using analytical techniques such as SEM, XRD, XRF, XPS and nitrogen adsorption. Such metal compound nanoparticles formed between primary silica particles, providing micropores and mesopores caused by the formation of Si—O—M bonds (M = Al, Ni). …”
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  6. 1526

    Application of Some Starch Hydrogels for the Removal of Mercury(II) Ions from Aqueous Solutions by A. Hashem, F. Ahmad, R. Fahad

    Published 2008-10-01
    “…The prepared hydrogel samples were characterized by estimating their nitrogen and carboxy group contents, and by the application of FT-IR spectroscopy, thermogravimetric analysis (TGA) and scanning electron microscopy (SEM); in addition, their water retention values, WRVs, were also determined. …”
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  7. 1527

    Synthesis of a Molecularly Imprinted Polymer on Silica-Gel Surfaces for the Selective Adsorption of Indole from Fuel Oil by Yang Cao, Wanzhen Xu, Xiangyang Wu, Yuan Li, Hui Li, Weihong Huang

    Published 2013-06-01
    “…The polymer was then used for selective adsorption of indole from fuel oil. Nitrogen adsorption, Fourier transform-infrared spectrometry and scanning electron microscopy were used to characterize the morphology of indole–MIP. …”
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  8. 1528

    Langmuir Adsorption on Fractal Surfaces by Volodymyr V. Kutarov, L. Zub Yu, Erich Robens, Shanath Amarasiri A. Jayaweera

    Published 2015-04-01
    “…Then the fractal dimension is determined. using the proposed methods, we calculated the fractal dimensions of samples of xerogel at low-temperature nitrogen adsorption, lunar regolith sample at a low temperature of krypton and n-heptanes, and water vapour adsorption at ambient temperature.…”
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  9. 1529

    Synthesis and Kinetics of Generation of MMS/MFI Materials Prepared on the Basis of Ti-Aerosil by K.M. Khomenko, A.V. Rudneva, E.I. Oranskaya

    Published 2006-12-01
    “…The products were characterized by IR spectroscopy (FT-IR), X-ray diffraction (XRD) and nitrogen adsorption methods. Hydrothermal processing (HTP) for relatively short time periods (ca. 8 h) led to the formation of zeolite nano-domains in the amorphous titanium-silica matrix exhibiting perfect two-dimensional hexagonal packing without destruction of the mesopore framework. …”
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    Article
  10. 1530

    Impact of radiofrequency sputtering power on the stoichiometry of a Cu2ZnSnS4 layer film prepared from a single quaternary target by Saleh N. Alamri

    Published 2025-12-01
    “…The effect of annealing at 450°C in ambient nitrogen on the properties of the prepared film was also investigated.…”
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  11. 1531

    Machine Learning-based Water Quality Forecasting for Shenzhen Bay by XIONG Jianzhi, XIONG Rui, LU Haiyan, ZHENG Yi

    Published 2024-07-01
    “…Based on high-frequency monitoring data collected by the buoy online monitoring system in Shenzhen Bay, machine learning methods including artificial neural networks (ANN), support vector regression (SVR), and random forest (RF) are employed to conduct short-term forecasting of water quality parameters such as dissolved oxygen (DO), chlorophyll-a (Chl.a), total nitrogen (TN), and total phosphorus (TP). The research findings indicate that utilizing high-frequency in-situ water quality monitoring data enables accurate prediction of water quality in Shenzhen Bay within 24 hours. …”
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  12. 1532

    Oxidized BPL Carbons by S.S. Barton, M.J.B. Evans, J.A.F. Macdonald

    Published 1993-03-01
    “…The very highly oxidized carbon samples were found to have a significantly lower BET surface area determined from nitrogen desorption at 77 K and higher apparent density measured from mercury displacement.…”
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  13. 1533

    La flore sauvage du boulevard Dr Henri-Henrot à Reims/Durocortorum : approche carpologique de l’environnement du site et des productions de denrées végétales by Véronique Matterne, Clémence Pagnoux

    Published 2022-11-01
    “…The index average measuring the sensitivity to nitrogen supply (Julve 1998; Jauzein, Nawrot 2011) is significant of rather rich or amended soils (average of 6 out of 9 for 105 taxa). …”
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  14. 1534

    Stable Isotope Turnover and Fractionation of Different Feed in the Juvenile Scylla paramamosain by Shengping ZHONG, Xiaohui CAI, Jianda SONG, Xujia LIU, Yinhui PENG, Lianghua HUANG, Changzi GE, Guoqiang HUANG

    Published 2025-02-01
    “…Investigating the effects of different diets on carbon and nitrogen stable isotope turnover and fractionation coefficients in juvenile green crabs (Scylla paramamosain), we used 200 tanks measuring 50 × 40 × 40 cm. …”
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  15. 1535

    Effects of different water and fertilizer treatments on the matrix properties and plant growth of tailings waste by Yanchen Li, Yang Yang, Jialin He, Shan Guo, Xuejing An, Yan Li, Rui Guo, Yipeng Lin, Ruipeng Zhang

    Published 2025-01-01
    “…After a 30-day period of nitrogen fertilizer and water treatment, an analysis was conducted to evaluate the physicochemical properties and growth status of the tailing matrix for different treatments. …”
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  16. 1536

    Enterobacter-inoculation altered the C, N contents and regulated biomass allocation in Reaumuria soongorica to promote plant growth and improve salt stress tolerance by Xin-Guang Bao, Xin-Guang Bao, Pei-Fang Chong, Pei-Fang Chong, Cai He, Xue-Mei Lu, Xue-Ying Wang, Feng Zhang, Bing-Bing Tan, Jia-Li Yang, Li-Li Gao

    Published 2025-01-01
    “…However, the mechanisms through which PGPR regulate the contents of carbon (C) and nitrogen (N), and biomass allocation of desert plant in response to salt stress is still unclear. …”
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  17. 1537

    The Impact of Mixed Application of Modified Straw Biochar and Organic Fertilizer on Soil Water Retention and Fertility Maintenance in the Loess Hilly Dry Area by ZHANG Peizhen, LUO Juan, YAO Zonglu, CHANG Fangling, HUO Lili, ZHAO Lixin

    Published 2024-12-01
    “…[Methods] The corn straw biochar produced by pyrolysis at 500 ℃ for 2 h under a nitrogen atmosphere was modified by immersion in 1 mol/L H3PO4, NaOH, and NH4Cl reagents, respectively, to obtain different modified corn straw biochars. …”
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  18. 1538

    The hydraulic performance and clogging characteristics of a subsurface drip irrigation system operating for five years in the North China plain by Li Zaiyu, Mo Yan, Gao Hao, Gong Shihong, Zhang Yanqun, Li Guangyong, Wu Feng

    Published 2025-02-01
    “…This research explored the response patterns of the emitter relative discharge (Dra), Christiansen uniformity coefficient (Cu), flow index (x), and clogging substance content in various parts of the emitters to different levels of irrigation, nitrogen application, and aeration. The results revealed that Dra and Cu significantly decreased (p < 0.05) with increasing nitrogen application, whereas the changes in irrigation and aeration were not statistically significant. …”
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  19. 1539

    Impact of cascade reservoir on the sources of organic matter in sediments of Lancang river by Yufei Bao, Meng Sun, Yuchun Wang, Ji Lu, Yajie Wu, Hao Chen, Shanze Li, Yong Qin, Zhuowei Wang, Jie Wen, Xinghua Wu, Zhongjun Wang

    Published 2025-01-01
    “…The research reveals significant spatial variations in total organic carbon (TOC) and total nitrogen concentrations in the sediments of the four reservoirs. …”
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  20. 1540

    Metabolomics mechanism of traditional soy sauce associated with fermentation time by Li Zhu, Siyu He, Ying Lu, Jianhong Gan, Ningping Tao, Xichang Wang, Zaoli Jiang, Yuanxiang Hong, Changhua Xu

    Published 2022-03-01
    “…Results showed that formaldehyde nitrogen, total soluble nitrogen (TSN), non-salt soluble solids, amino acids, free 5’-nucleotides and volatile compounds in CTFSS changed obviously during fermentation. …”
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