Showing 2,361 - 2,380 results of 265,846 for search '"4"', query time: 0.35s Refine Results
  1. 2361

    SYNTHESIS AND INFRARED STUDY OF SOME PHENYLPHOSPHONATE, DIPHENYLPHOSPHINATE AND ACETATOPHOSPHONATE NEW ORGANOTIN (IV) DERIVATIVES AND ADDUCTS by MODOU SARR, AMINATA DIASSE-SARR, LIBASSE DIOP

    Published 2020-07-01
    “… Three organotin (IV) derivatives PhPO3HSnBu2Cl, SnBu2Ph2PO2Cl×3/2H2O, Sn(PhPO3)Cl2×2H2O obtained on allowing PhPO3H2 or propylammonium PhPO3H to react with SnBu2Cl2, SnCl2×2H2O and two adducts [(C6H5CH2)2NH2]3O2C(CH2)2PO3×3SnPh3Cl, [CyNH3(HO2POCH2-N(CH2CO2H)2]2×3SnCl4.2H2O×NH4Cl obtained on allowing (C6H5CH2)NH2)3O2C(CH2)2PO3 or [CyNH3(HO2POCH2-N(CH2 CO2H)2]2 and SnPh3Cl or SnCl2×2H2O to react in ethanolic media have been characterized by elemental analyses, infrared and Mossbauer techniques. …”
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  2. 2362

    Study on the Electronic Structures and Optical Properties in Four Directions of Si-NWs Modified by Oxygen Atoms by Xue-Ke Wu, Song Zhang, Yan-Lin Tang

    Published 2024-01-01
    “…In this work, the first-principles study based on density functional theory was applied to investigate the geometries, electronic structures, and optical properties in four directions of the Si-NWs surface, which are modified by oxygen atoms. …”
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    Article
  3. 2363
  4. 2364
  5. 2365

    Experimental Study on Fe3O4 Nanoparticle-Assisted Microwave Enhancing Heavy Oil by Teng Lu, Faqiang Dang, Haitao Wang, Qingmin Zhao, Zhengxiao Xu

    Published 2022-01-01
    “…The experimental conditions are 2 wt% tetralin mass concentration, 0.5 wt% nano-Fe3O4 particle mass concentration, microwave heating time 50-60 min, and microwave power 539 W. …”
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  6. 2366

    Nano-ZnO Catalyzed Green and Efficient One-Pot Four-Component Synthesis of Pyranopyrazoles by Sunil U. Tekale, Sushma S. Kauthale, Kavita M. Jadhav, Rajendra P. Pawar

    Published 2013-01-01
    “…An efficient zinc oxide nanoparticle catalyzed one-pot, four-component synthesis of 6-amino-3-methyl-5-cyano-4-aryl-1,4-dihydropyrano[2,3-c]pyrazoles from aromatic aldehyde, malononitrile, ethyl acetoacetate, and hydrazine hydrate in aqueous medium is described. …”
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  7. 2367
  8. 2368
  9. 2369

    Development of HPLC Protocol and Simultaneous Quantification of Four Free Flavonoids from Dracocephalum heterophyllum Benth. by Sodik Rakhmonovich Numonov, Muhammad Nasimullah Qureshi, Haji Akber Aisa

    Published 2015-01-01
    “…Quantification of the four flavonoids, namely, luteolin, kaempferol, diosmetin, and chrysosplenetin, has been performed for the first time in 80% ethanolic extract of Dracocephalum heterophyllum B. through HPLC coupled to UV detector after optimization of extracting solvent and chromatographic conditions. …”
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  10. 2370
  11. 2371

    PDE4 and Epac1 Synergistically Promote Rectal Carcinoma via the cAMP Pathway by Xiangyu Kong, Ganghao Ai, Dai Wang, Renzhen Chen, Dongbei Guo, Youliang Yao, Kai Wang, Guiye Liang, Fengjie Qi, Wenzhi Liu, Yongxing Zhang

    Published 2019-01-01
    “…To assess the expression levels of exchange protein 1 directly activated by cAMP (Epac1) and phosphodiesterase 4 (PDE4) in rectal carcinoma, and their associations with clinicopathological indexes. …”
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  12. 2372
  13. 2373

    Theoretical Investigation of the Structural, Spectroscopic, Electronic, and Pharmacological Properties of 4-Nerolidylcathecol, an Important Bioactive Molecule by Renyer A. Costa, Earle Silva A. Junior, Jaqueline de A. Bezerra, Josiana Moreira Mar, Emerson S. Lima, Maria Lucia B. Pinheiro, Diego V. C. Mendonça, Guilherme Braule P. Lopes, Adjane Dalvana S. Branches, Kelson M. T. Oliveira

    Published 2019-01-01
    “…4-Nerolidylcatechol (4NRC), a secondary metabolite described as a potent antioxidant that presents anti-inflammatory, antimalarial, analgesic, and cytotoxic properties, has been receiving prominence in the catechol class. …”
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  14. 2374

    Unraveling the heterogeneity of WHO grade 4 gliomas: insights from clinical, imaging, and molecular characterization by Haihui Jiang, Xijie Wang, Xiaodong Chen, Shouzan Zhang, Qingsen Ren, Mingxiao Li, Ming Li, Xiaohui Ren, Song Lin, Yong Cui

    Published 2025-02-01
    “…Abstract Purpose The 2021 WHO classification of central nervous system tumors introduced molecular criteria to stratify Grade 4 gliomas, which remain heterogeneous. This study aims to elucidate the clinical, radiological, and molecular characteristics of WHO Grade 4 gliomas, focusing on their prognostic implications and the development of a predictive model for astrocytoma IDH-mutant WHO Grade 4 (A4). …”
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  15. 2375

    PENGEMBANGAN BAHAN AJAR CERITA BERGAMBAR MATERI PKN DI KELAS IV SEKOLAH DASAR by Siti Aisyah, Agra Dwi Saputra, Sedya Santosa

    Published 2024-04-01
    “…Bahan buka cerita bergambar tema 4 kelas IV SDN 15 Palembang juga dipotong sangat praktis. …”
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  16. 2376

    Unveiling the Cosmic Chemistry: Revisiting the Mass–Metallicity Relation with JWST/NIRSpec at 4 < z < 10 by Arnab Sarkar, Priyanka Chakraborty, Mark Vogelsberger, Michael McDonald, Paul Torrey, Alex M. Garcia, Gourav Khullar, Gary J. Ferland, William Forman, Scott Wolk, Benjamin Schneider, Mark Bautz, Eric Miller, Catherine Grant, John ZuHone

    Published 2025-01-01
    “…We present star formation rates (SFRs), the mass–metallicity relation (MZR), and the SFR-dependent MZR across redshifts 4–10 using 81 star-forming galaxies observed by the JWST NIRSpec employing both low-resolution PRISM and medium-resolution gratings, including galaxies from the JWST Advanced Deep Extragalactic Survey (JADES) GOODS-N and GOODS-S fields, the JWST-PRIMAL Legacy Survey, and additional galaxies from the literature in the A2744, SMACS-0723, RXJ2129, BDF, COSMOS, and MACS1149 fields. …”
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  17. 2377

    Design, Synthesis and Evaluation of Schiff’s Bases of 4-Chloro-3-coumarin aldehyde as Antimicrobial Agents by Shriram Bairagi, Ashok Bhosale, Meenakshi N. Deodhar

    Published 2009-01-01
    “…4-Chloro-2-oxo-2H-chromene-3-carbaldehyde (2) was reacted with different anilines in rectified spirit as solvent to yield a series of the title compounds i.e. 4-chloro-3-((substituted-phenylimino) methyl)-2H-chromen-2-one (3a-i). …”
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  18. 2378
  19. 2379

    In vitro interleukin 4 and interferon-gamma production by mononuclear cells from atopic dermatitis patients by Serge Well, Friedhelm Diel

    Published 1993-01-01
    “…In order to elucidate further the possible role of specific cytokines in the pathogenesis of atopic dermatitis (AD) the in vitro production of interleukin 4 (IL-4) and interferon-gamma (IFN-γ) in patients with severe atopic dermatitis (n = 4) was compared with that in a group of non-atopic healthy controls. …”
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  20. 2380

    Were The “Best Made Better”? A Content Analysis of South Carolina 4-H Programming by Lauren B. Hood, Christopher J. Eck, K Dale Layfield, Joseph L. Donaldson

    Published 2024-07-01
    “…The 4-H motto is “learn by doing” and is practiced with a hands-on learning approach. …”
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