Showing 481 - 500 results of 847 for search '"aromaticity"', query time: 0.06s Refine Results
  1. 481

    Multiple PAHs’ Detection under CDOM Interference Based on Excitation-Emission Matrix and Interval Selection by Ruizhuo Li, Limin Gao, Guojun Wu, Jing Dong

    Published 2023-01-01
    “…Fluorescence technology is an effective tool for detecting polycyclic aromatic hydrocarbons (PAHs) in water. However, the accuracy of fluorescence detection is reduced by the spectral overlap of different PAHs and coexisting colored dissolved organic matter (CDOM). …”
    Get full text
    Article
  2. 482

    Effect of Attapulgite Nanorods and Calcium Sulfate Microwhiskers on the Reaction-Induced Phase Separation of Epoxy/PES Blends by Xiaolin Tang, Xinhui Zhong, Guozhu Zhan, Yingfeng Yu, Hongdong Zhang

    Published 2013-01-01
    “…The influence of two kinds of mesoscale inorganic rod fillers, nanoscale attapulgite and micron-sized CaSO4 whisker, on the reaction-induced phase separation of epoxy/aromatic amine/poly- (ether sulfone) (PES) blends has been investigated by optical microscopy (OM), scanning electron microscopy (SEM), and time resolved light scattering (TRLS). …”
    Get full text
    Article
  3. 483

    SYNTHESIS OF THE ZSM-5 ZEOLITE WITH MIXTURES BINARY OF TETRAETHYLAMMONIUM HYDROXIDE AND AMINES AS ORGANIC STRUCTURE DIRECTING AGENTS by Diogo Pimentel de Sá da Silva, Bruno José Barros da Silva, Antonio Osimar Sousa da Silva

    Published 2020-09-01
    “…Noteworthy is the zeolite ZSM-5 used as a catalyst in reactions in the areas of petrochemical and fine chemistry, such as cracking, isomerization, alkylation and aromatization reactions of olefins.  In view of this, the objective of this work was to synthesize the ZSM-5 zeolite, through binary mixtures of tetraethylammonium hydroxide (TEAOH) and different amines (n-butylamine, isobutylamine and diisobutylamine) acting as organic structure directing agents (SDA's). …”
    Get full text
    Article
  4. 484
  5. 485

    Solvent Effect on the Solid-Surface Fluorescence of Pyrene on Cellulose Diacetate Matrices by Svetlana M. Rogacheva, Elena V. Volkova, Milena I. Otradnova, Tamara I. Gubina, Anna B. Shipovskaya

    Published 2018-01-01
    “…The proposed method is promising for use in environmental monitoring of polycyclic aromatic hydrocarbons.…”
    Get full text
    Article
  6. 486

    Synthesis and Biological Activity of (Z) –n-(5-Benzylidene-4-oxo-2-substituted- phenylthiazolidin-3-yl)-5-((1, 3-dioxoisoindolin-2-yl)methyl)-2-hydroxybenzamide by M. C. Patel, Dhameliya

    Published 2010-01-01
    “…5-((1, 3-Dioxoisoindolin-2-yl)methyl-2-hydroxybenzohydrazide (1) undergoes facile condensation with aromatic aldehydes to afford the corresponding N'-substituted-phenyl-5-((1,3-dioxoisoindolin-2-yl) methyl)-2-hydroxybenzohydrazide (2a-h) in good yields. …”
    Get full text
    Article
  7. 487

    Molecular-level characterization of supraglacial dissolved and water-extractable organic matter along a hydrological flow path in a Greenland Ice Sheet micro-catchment by E. L. Doting, E. L. Doting, I. T. Stevens, A. M. Kellerman, P. E. Rossel, R. Antony, R. Antony, A. M. McKenna, A. M. McKenna, M. Tranter, L. G. Benning, L. G. Benning, R. G. M. Spencer, J. R. Hawkings, J. R. Hawkings, A. M. Anesio

    Published 2025-01-01
    “…We find a decrease in the relative abundance of aromatic formulae from surface ice (24.9 <span class="inline-formula">±</span> 2.8 %) to weathering crust meltwater (3.5 <span class="inline-formula">±</span> 0.3 %) to supraglacial stream water (2.2 <span class="inline-formula">±</span> 0.2 %), pointing towards photodegradation of aromatic DOM during supraglacial meltwater transit. …”
    Get full text
    Article
  8. 488

    Fluorescence, Decay Time, and Structural Change of Laser Dye Cresyl Violet in Solution due to Microwave Irradiation at GSM 900/1800 Mobile Phone Frequencies by Fuat Bayrakceken, Korkut Yegin

    Published 2012-01-01
    “…They usually consist of an extended system of conjugated double or aromatic π-bonds with attached auxochromic (electron donating) groups shifting the absorption band further towards longer wavelength. …”
    Get full text
    Article
  9. 489

    Occurrence and Assessment of Chemical Contaminants in Drinking Water in Tunceli, Turkey by Veysel Demir, Sezai Ergin

    Published 2013-01-01
    “…The objective of this study was to analyze drinking water samples from 21 sites in the city center and seven municipalities of Tunceli, Turkey, in order to determine the presence of nitrate, nitrite, fluoride, bromate, pesticides, polycyclic aromatic hydrocarbons (PAHs), trihalomethanes (THMs), and some other chemicals. …”
    Get full text
    Article
  10. 490

    Analysis of Mesquite (Prosopis juliflora) Protein Concentrate for Possible Use as Supplementary Protein by José Jaimes-Morales, Yesid A. Marrugo-Ligardo, Diofanor Acevedo-Correa

    Published 2022-01-01
    “…However, mesquite covers the requirements of essential amino acids, surpassing 31% of the protein required in adults, except for cysteine sulfur amino acids and aromatic amino acids. In other age groups such as children, mesquite had a high content of histidine, which is necessary and considered essential during infant development. …”
    Get full text
    Article
  11. 491

    Particulate Matter-Induced Acute Coronary Syndrome: MicroRNAs as Microregulators for Inflammatory Factors by Nur Izah Ab Razak, Nor Eliani Ezani, Norzian Ismail

    Published 2021-01-01
    “…However, little is known about miRNA responses to fine PM (PM2.5, PM10, ultrafine particles, black carbon, and polycyclic aromatic hydrocarbon) from air pollution and their potential contribution to cardiovascular consequences, including systemic inflammation regulation. …”
    Get full text
    Article
  12. 492

    Chromatographic and spectroscopic studies on β-cyclodextrin functionalized ionic liquid as chiral stationary phase: Enantioseparation of NSAIDs by Nurul Yani Rahim, Kheng Soo Tay, Sharifah Mohamad

    Published 2018-02-01
    “…Recently, we reported a new chiral stationary phase prepared using β-cyclodextrin functionalized with aromatic ionic liquid which is aimed to enhance the performance of enantioseparation of flavonoids and β-blockers. …”
    Get full text
    Article
  13. 493

    Imidazole: Having Versatile Biological Activities by Amita Verma, Sunil Joshi, Deepika Singh

    Published 2013-01-01
    “…Being a polar and ionisable aromatic compound, it improves pharmacokinetic characteristics of lead molecules and thus is used as a remedy to optimize solubility and bioavailability parameters of proposed poorly soluble lead molecules. …”
    Get full text
    Article
  14. 494

    Study of physiochemical properties of trisubstituted pyrazole derivatives using polar aprotic solvents by Poonam Devi, Hardeep Anand, Rashmi Pundeer, Suresh Kumar

    Published 2025-01-01
    “…Abstract Pyrazole derivatives are aromatic heterocyclic compounds endowed with multifaceted applications. …”
    Get full text
    Article
  15. 495

    Guest-induced structural transformation of single-crystal 3D covalent organic framework at room and high temperatures by Aiping Yao, Hongliang Xu, Kuizhan Shao, Chunyi Sun, Chao Qin, Xinlong Wang, Zhongmin Su

    Published 2025-02-01
    “…Notably, COF-300 can maintain its single-crystal structure even at 280 °C and efficiently absorbs polycyclic aromatic hydrocarbons in their molten state. The kinetics of structural transformations among conformational isomers are investigated by combining PXRD and theoretical calculations. …”
    Get full text
    Article
  16. 496

    Distance and degree based topological characterization, spectral and energetic properties, and 13C NMR signals of holey nanographene by Savari Prabhu, M. Arulperumjothi, Fikadu Tesgera Tolasa, S. Govardhan

    Published 2025-04-01
    “…Cycloarenes represent a class of polycyclic aromatic compounds distinguished by their intricate molecular structures, where multiple benzene rings are fused together to form macrocyclic frameworks. …”
    Get full text
    Article
  17. 497

    Synthesis of Symmetrical and Asymmetrical Azines Encompassing Naphtho[2,1-b]furan by a Novel Approach by K. Veena, M. Ramaiah, G. K. Vanita, T. S. Avinash, V. P. Vaidya

    Published 2011-01-01
    “…The reaction of 3-nitro-2-acetylnaphtho[2,1-b]furan (2) with hydrazine hydrate produced corresponding hydrazone (3) in excellent yield, which on treatment with various aromatic aldehydes under different reaction conditions resulted in the formation of symmetrical azines (4a-e) and unsymmetrical azines (5a-e). …”
    Get full text
    Article
  18. 498

    Catalyst-controlled directing group translocation in the site selective C–H functionalization of 3-carboxamide indoles and metallocarbenes by Kuang Gu, Mary T. Hall, Zachary D. Tucker, Gregory M. Durling, Brandon L. Ashfeld

    Published 2025-01-01
    “…Mechanistic experiments indicate a concerted 1,2-acyl migration step and indole metallation occurring through an electrophilic aromatic substitution process.…”
    Get full text
    Article
  19. 499

    Towards sustainable solutions: Comprehensive review of advanced porous materials for CO₂ capture, hydrogen generation, pollutant degradation, and energy application by Iltaf Khan, Anam Altaf, Samreen Sadiq, Shoaib Khan, Aftab Khan, Sohail Khan, Muhammad Humayun, Abbas Khan, Rasha A. Abumousa, Mohamed Bououdina

    Published 2025-03-01
    “…Recently, there have been significant developments in advanced porous materials, especially with types like porous organic polymers, metal-organic frameworks, hydrogen-bonded organic frameworks, covalent organic frameworks, zeolites, and porous aromatic frameworks. These materials are gaining attention for their remarkable characteristics, including high surface area, adjustable pore sizes, strong adsorption capacity, stability under various conditions, effective catalytic properties, and good electrical conductivity, making them useful across a range of applications. …”
    Get full text
    Article
  20. 500

    Impact of Hop Residue Reuse on the Chemical and Sensory Properties of Craft Beer by Cesar I. Mejia-Llontop, Carlos E. Tirado-Rodríguez, Alanis Acosta-Baca, Maylee Aguayo-Flores, Manuel Ascate-Pasos, Carmen Ayala-Jara, Gilbert Rodriguez, Eudes Villanueva, Elza Aguirre

    Published 2024-12-01
    “…Hops are an important component of beer brewing, providing aromatic and bittering properties that are essential to consumer appeal. …”
    Get full text
    Article