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Journal articles on the topic 'Neutral alumina'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Prashant, P. Chaudhari, S. Dhivare Ravindra, and S. Rajput Shankarsing. "Microwave Assisted Synthesis of Heterocycles Accompanied by Antimicrobial Screening." Journal of Advances and Scholarly Researches in Allied Education XV, no. 2 (2018): 324–29. https://doi.org/10.5281/zenodo.3911291.

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<strong>Abstract </strong> A clean, efficient, and solvent-free method for the synthesis of Bis-chalcones and Pyrazoles was carried out with the help of microwave irradiations and neutral alumina. The novel class of Bischalcones and pyrazoles were comprehended by the treatment of N-phenyl succinimides with p-fluoro benzaldehyde. The cyclic imide on condensation with p-fluoro benzaldehyde furnished a series of bis chalcones and further, they undergo cyclization with hydrazine hydrate to furnish pyrazoles. This condensation could make better and easier by a solvent-free mechanism with the help o

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2

BURSILL, L. A., PENG JU LIN, and DAVID J. SMITH. "SURFACE POLARITY OF ALUMINA." Modern Physics Letters B 01, no. 03 (1987): 115–18. http://dx.doi.org/10.1142/s0217984987000168.

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Atomic-resolution electron microscopic surface profile images of sapphire are reported for the first time. Comparison of experimental images with computer simulations, leads to the realization that aluminium and oxygen atom surface terminations may be distinguished, for both neutral and charged surfaces. Hence surface polarity, as well as details of surface step structure and mobility may be determined. Positive surface polarity is preferred.

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3

Wang, R. T., and J. C. Wang. "Alumina Nanofluids As Electrolytes Comparisons to Various Neutral Aqueous Solutions Inside Battery." Journal of Mechanics 32, no. 3 (2015): 369–79. http://dx.doi.org/10.1017/jmech.2015.86.

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AbstractThis study investigated four electrolytes (tap water, mineral water, seawater, and Al2O3 nanoparticles emulsified in deionized water) to prepare nanofluids for enhancing their microgeneration and heattransfer capabilities by conducting thermoelectric performance experiments on power generation facilities. This study first performed a two-step synthesis process by using emulsion-ultrasonic technology for fabricating an Al2O3 nanofluid to determine the optimal suspended stability for the alumina nanofluid used as an electrolyte according to the Zeta potential, pH value, thermal conductiv

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4

Novaković, Tatjana, Dejan Pjević, Nadica Abazović, and Zorica Mojović. "Novel Alumina–Copper Electrode Composites: Toward Efficient Glutamate and H2O2 Detection." Compounds 5, no. 2 (2025): 10. https://doi.org/10.3390/compounds5020010.

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Alumina is a well-known catalyst and catalyst support. The electrochemical properties of alumina have recently gained attention. The electrochemical response of alumina greatly depends on the type and number of surface groups present in different alumina types. The surfaces of two types of alumina, anhydrous (A) and trihydrate (T) alumina, were modified by copper through an ion-exchange procedure. The samples were characterized by diffuse reflectance UV–Vis spectroscopy. The obtained samples were used as modifiers of carbon paste electrodes. The electrochemical characterization of the samples

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Feixas, Joan, Anna Capdevila, Francisco Camps, and Angel Guerrero. "Selective cleavage of tert-butyldimethylsilyl ethers with neutral alumina." Journal of the Chemical Society, Chemical Communications, no. 19 (1992): 1451. http://dx.doi.org/10.1039/c39920001451.

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6

Takai, C., Masayoshi Fuji, and Minoru Takahashi. "Characterization of Heterocoagulation by Direct Observation Technique." Advanced Materials Research 11-12 (February 2006): 681–84. http://dx.doi.org/10.4028/www.scientific.net/amr.11-12.681.

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The control of particle dispersion is essential to the fabrication of highly designed ceramics. In this study, a direct observation technique was employed to characterize the heterocoagulation of particles in two-component slurry. TEM observation of solidified slurry composed of alumina and silica particles was attempted to evaluate heterocoagulation. At 10 mass% solid loading, the TEM showed the aggregation of silica with dispersed alumina particles at acidic region. A large scale of aggregation caused by attractive force among alumina and silica particles was observed on the TEM images at ne

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7

Yakabe, Shigetaka, Masao Hirano, and Takashi Morimoto. "Alumina-assisted reduction of carbonyl compounds with sodium borohydride in hexane." Canadian Journal of Chemistry 76, no. 12 (1998): 1916–21. http://dx.doi.org/10.1139/v98-204.

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A broad range of aliphatic, alicyclic, and aromatic ketones and aldehydes underwent smooth reduction with a combination of common, inexpensive laboratory reagents, sodium borohydride and chromatographic neutral alumina, in hexane to afford the corresponding alcohols in a selective and high-yielding manner under mild and neutral conditions. The NaBH4-based biphasic system can also successfully be used for the reduction of unsaturated substrates as well as steroidal and highly hindered ketones.

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8

Groza, A., A. Surmeian, C. Diplasu, C. Luculescu, C. Negrila, and M. Ganciu. "Generation of Porous Alumina Layers in a Polydimethylsiloxane/Hydrogen Peroxide Medium on Aluminum Substrate in Corona Discharges." Journal of Nanomaterials 2014 (2014): 1–6. http://dx.doi.org/10.1155/2014/578720.

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The porous alumina (Al2O3) layer obtained at the interface between polydimethylsiloxane/hydrogen peroxide medium and aluminum substrate under charged and neutral species injection produced in negative corona discharges in air at atmospheric pressure is analyzed by different methods in this paper. The scanning electron microscopy investigations showed the uniform distribution of the pores formed in the alumina layer and their columnar structures. Both energy dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS) measurements indicate that during the anodization process o

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9

Taran, Martine, and Bernard Delmond. "Obtention de nouveaux squelettes diterpéniques lors de l'isomérisation d'époxydes diterpéniques sur alumine active." Canadian Journal of Chemistry 66, no. 7 (1988): 1558–65. http://dx.doi.org/10.1139/v88-253.

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The isomerization of diterpene epoxides on active neutral alumina has established the existence of new rearrangements of the diterpene skeleton. Methyl 8,14β-epoxysandarcopimarate leads to bicyclic diterpene compounds by a Grob fragmentation, to derivatives of cleistanthane by a 1,2 migration of the vinyl substituent, as well as to one cycloditerpene compound. The 7,8 (or 8,9) derivatives of methyl isopimarate lead essentially to hydroxyolefins formed by a bifunctional acid–base mechanism at the alumina surface. [Journal translation]

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10

Pareek, Pawan, Ravi Kant, Sanjeev Shukla, and Krishan Ojha. "Rapid synthesis and biological evaluation of 1,4-dihydropyridine derivatives containing a benzothiazolyl moiety." Open Chemistry 8, no. 1 (2010): 163–73. http://dx.doi.org/10.2478/s11532-009-0114-z.

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AbstractA series of N-(6-methylbenzothiazolyl)-2,3,5,6-tetrasubstituted-4-(aryl)-1,4-dihydropyridines were synthesized by reaction of 2-amino-6-methylbenzothiazole, aromatic aldehyde and active methylene compound in methanol by conventional, as well as, microwave irradiation (solvent free and solid support) methods. The microwave irradiation technique gives better yield and shorter reaction time. Among solid supported microwave irradiation better yields are obtained in acidic alumina as compared to silica, neutral alumina, and basic alumina. All compounds were tested for antibacterial and anti

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11

Gobrecht, David, Jan Philip Sindel, Helena Lecoq-Molinos, and Leen Decin. "The Ionization Energies of Dust-Forming Metal Oxide Clusters." Universe 7, no. 7 (2021): 243. http://dx.doi.org/10.3390/universe7070243.

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Stellar dust grains are predominantly composed of mineralic, anorganic material forming in the circumstellar envelopes of oxygen-rich AGB stars. However, the initial stage of the dust synthesis, or its nucleation, is not well understood. In particular, the chemical nature of the nucleating species, represented by molecular clusters, is uncertain. We investigated the vertical and adiabatic ionization energies of four different metal-oxide clusters by means of density functional theory. They included clusters of magnesia (MgO)n, silicon monoxide (SiO)n, alumina (Al2O3)n, and titania (TiO2)n with

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12

Gaidarova, Elena L., and Galina V. Grishina. "Enantioselective Synthesis of 3,3-Disubstituted 4-Piperidinones on Neutral Alumina." Synlett 1992, no. 01 (1992): 89–93. http://dx.doi.org/10.1055/s-1992-21278.

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13

Lassinantti Gualtieri, Magdalena. "Synthesis of MFI films on α-alumina at neutral pH". Microporous and Mesoporous Materials 117, № 1-2 (2009): 508–10. http://dx.doi.org/10.1016/j.micromeso.2008.07.022.

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14

Sakthivel, S., B. Neppolian, M. Palanichamy, B. Arabindoo, and V. Murugesan. "Photocatalytic degradation of leather dye over ZnO catalyst supported on alumina and glass surfaces." Water Science and Technology 44, no. 5 (2001): 211–18. http://dx.doi.org/10.2166/wst.2001.0289.

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The photocatalytic degradation of leather dye, Acid green 16, has been investigated over a ZnO catalyst supported on two different materials, namely alumina and glass beads (3-5 mm diameter). Sunlight was used as the energy source. The alumina-supported ZnO outperformed the glass-supported ZnO under identical operational conditions suggesting that the dye molecules are adsorbed on the alumina supports to make a high concentration environment around the loaded ZnO. The degradation efficiency was greater at pH = 4 compared to other acidic and neutral pH. Also, the degradation efficiency was a li

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15

Ravindra, S. Dhivare, and S. Rajput S. "Microwave assisted solvent free synthesis and antifungal evaluation of3, 5-bis-(4-hydroxy-3-methoxybenzylidene)-Nphenylpiperidine- 2, 6-dionederived from N-phenyl glutarimides." International Journal of ChemTech Research 9, no. 3 (2016): 325–31. https://doi.org/10.5281/zenodo.3911265.

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<strong>Abstract: </strong> An efficient microwave supported solvent-free synthesis of <strong><em>3,5-bis-(4-hydroxy-3-methoxybenzylidene-N-phenylpiperidine-2,6-diones</em></strong> described with the subsequent condensation of N-phenyl glutarimides with 4-hydroxy-3methoxy-benzaldehyde in presence neutral alumina. The afforded compounds exhibited good and remarkable antifungal activities.  

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16

FEIXAS, J., A. CAPDEVILA, F. CAMPS, and A. GUERRERO. "ChemInform Abstract: Selective Cleavage of tert-Butyldimethylsilyl Ethers with Neutral Alumina." ChemInform 24, no. 3 (2010): no. http://dx.doi.org/10.1002/chin.199303120.

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17

R., S. Dhivare, and S. Rajput S. "Microwave Assisted Synthesis and Microbial Screening of Novel Amino-pyrimidine Derivatives using Bis-chalcones." Journal of Chemistry and Chemical Sciences (An International Research Journal), www.chemistry-journal.org 5, no. 10 (2015): 550–56. https://doi.org/10.5281/zenodo.3909691.

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ABSTRACT A simple and clean one pot method for the preparation of amino-pyrimidine derivatives using chalcones of cyclic imides and guanidine nitrate in presence of neutral alumina under microwave supported solvent free condition is described. Some of the synthesized amino-pyrimidines showed synergistic significant activities against Candida albicans and Aspergillus niger fungal strains.

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18

Saraswati, Kanodia, and Chander Thapliyal Prakash. "Green synthesis of thiophenyl-1,4-naphthoquinones." Journal of Indian Chemical Society Vol. 89, Jun 2012 (2012): 833–36. https://doi.org/10.5281/zenodo.5763869.

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Department of Chemistry, University of Delhi, Delhi--11 0 007, India Organic Building Materials Division, CSJR-Central Building Research Institute, Roorkee-247 667, Uttar Pradesh, India <em>E-mail</em> : pct866@yahoo.com <em>Manuscript received 29 March 2011, revised 23 August 2011, accepted 19 September 2011</em> Reaction of 1,4-naphthoquinones adsorbed on neutral alumina to thiophenols in ambient conditions gave respective mono thiophenyl 1,4-naphthoquinones regioselectively in quantitative yield. The solvent free synthesis and quantitative conversion makes the process practical method.

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19

Tishkevich, D. I., A. I. Vorobjova, and Denis A. Vinnik. "Formation and Corrosion Behavior of Nickel/Alumina Nanocomposites." Solid State Phenomena 299 (January 2020): 100–106. http://dx.doi.org/10.4028/www.scientific.net/ssp.299.100.

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Ni nanopillars (Ni NPs) composite materials formation technology was presented. The morphological and structural properties of the composite material were investigated using scanning electron microscopy, atomic force microscopy, X-ray diffraction. The corrosion resistance of the nanocomposite materials has been studied by potentiodynamic polarization curves analysis. The composite represents the array of vertically ordered Ni NPs with the identical size in alumina matrix. XRD investigation indicates that Ni NPs are polynanocrystalline material. It has been shown that Ni NPs and the composite m

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20

Venkatesan, P., and K. Moorthi. "Microwave-Induced, Iodine-Alumina Catalyzed Transformations of 1-(2′-hydroxyaryl)-3-(2-chloroquinolin-3-yl)-prop-2-en-1-one." E-Journal of Chemistry 9, no. 2 (2012): 1017–21. http://dx.doi.org/10.1155/2012/354875.

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The chalcone derivatives, 1-(2′-hydroxyaryl)-3-(2-chloroquinolin-3-yl)-prop-2-en-1-one was transformed to corresponding flavone derivatives by iodine impregnated neutral alumina under microwave irradiation. The synthesized flavone derivatives were structurally confirmed by elemental analysis, UV, IR and1H-NMR spectral data, and the notable yield obtained was compared with previously reported method.

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21

Noguchi, H., A. Nakajima, T. Watanabe, and K. Hashimoto. "Removal of bromate ion from water using TiO2 and alumina-loaded TiO2 photocatalysts." Water Science and Technology 46, no. 11-12 (2002): 27–31. http://dx.doi.org/10.2166/wst.2002.0712.

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The effects of pH and the surface charge of photocatalyst on photocatalytic reduction of bromate ions in water were examined by using TiO2 and alumina-loaded TiO2 photocatalysts. The amount of adsorbed bromate ion on TiO2 and the reduction rate of bromate ion by the TiO2 photocatalyst increased with lowering pH. It was suggested that the bromate ion adsorbed predominantly on the positively charged surface sites of TiO2 at lower pH, which thus promotes the rate of reduction. The iso-electric point of the TiO2 photocatalyst was shifted to the higher pH region by loading alumina on the TiO2 surfa

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22

Yan, Yiyong, Gaoyuan Ma, Wei Wei, and Jing Zhao. "Synthesis of Sulfonyldiazomethanes and Acetyldiazomethanes via an Alumina-Mediated Decarboxylation Strategy." Australian Journal of Chemistry 69, no. 2 (2016): 239. http://dx.doi.org/10.1071/ch15637.

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Diazo compounds are widely adopted in organic synthesis due to their carbine characteristics. One of the most interesting diazo compounds is diazolsulfonyl. Here, in the current study, we found that diazolsufonyl compounds could be prepared with moderate to excellent yield through decarboxylation of diazosulfonyl acetates by neutral alumina. We hope that this mild and simple method might inspire wider application of these useful compounds.

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23

Laganà, Aldo, Alessandro Bacaloni, Maryanna Castellano, et al. "Sample Preparation for Determination of Macrocyclic Lactone Mycotoxins in Fish Tissue, Based on On-Line Matrix Solid-Phase Dispersion and Solid-Phase Extraction Cleanup Followed by Liquid Chromatography/Tandem Mass Spectrometry." Journal of AOAC INTERNATIONAL 86, no. 4 (2003): 729–36. http://dx.doi.org/10.1093/jaoac/86.4.729.

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Abstract A new method based on matrix solid-phase dispersion (MSPD) on-line with a solid-phase extraction (SPE) cleanup process followed by liquid chromatography with tandem mass spectrometry (LC/MS/MS) is presented for the determination of 3 macrocyclic lactone mycotoxins in fish tissues: zearalenone, α-zearalenol, and β-zearalenol. The sample was prepared in a device that used a reversed-phase material (C18) or a normal-phase material (neutral alumina) as a matrix dispersing agent, and a graphitized carbon black cartridge was used for sequential cleanup by SPE. LC/MS/MS was used for selectiv

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24

Deepali, Mahajan. "MELAMINE TRISULFONIC ACID (MTSA) ON NEUTRAL ALUMINA CATALYZED AZA-MICHAEL ADDITION OF ALIPHATIC AMINES TO α, β - UNSATURATED CARBONYL COMPOUNDS AND NITRILES". International Journal of Current Research and Modern Education 2, № 2 (2017): 241–46. https://doi.org/10.5281/zenodo.1054419.

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Melamine Trisulfonic Acid (MTSA) on Neutral Alumina is used as an efficient catalyst for aza-Michael addition of primary and secondary aliphatic amines to a series of α,β-unsaturated carbonyl compounds and nitriles in acetonitrile to produce the corresponding <em>β</em>-amino derivatives in high yields. The method being simple and offers chemoselectivity, as aromatic amines were found to be unreactive<em>.</em>

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25

Pourjavadi, A., B. Soleimanzadeh та G. Bagheri Marandi. "Microwave-induced Cannizzaro reaction over neutral γ-alumina as a polymeric catalyst". Reactive and Functional Polymers 51, № 1 (2002): 49–53. http://dx.doi.org/10.1016/s1381-5148(02)00032-9.

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26

Balbo, A., C. Monticelli, A. Bellosi, and A. Pagnoni. "Corrosion of alumina/titanium diboride composites in neutral and acidic chloride solutions." Materials and Corrosion 53, no. 7 (2002): 471–78. http://dx.doi.org/10.1002/1521-4176(200207)53:7<471::aid-maco471>3.0.co;2-c.

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27

GAIDAROVA, E. L., and G. V. GRISHINA. "ChemInform Abstract: Enantioselective Synthesis of 3,3-Disubstituted 4-Piperidinones on Neutral Alumina." ChemInform 23, no. 32 (2010): no. http://dx.doi.org/10.1002/chin.199232161.

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28

Ghimire, Kedar Nath. "Effective Removal of Fluoride onto Metal Ions Loaded Orange Waste." Journal of Nepal Chemical Society 27 (August 21, 2012): 61–66. http://dx.doi.org/10.3126/jncs.v27i1.6660.

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Removal of fluoride is investigated onto several metal ions loaded phosphorylated orange juice residue and commercially available alumina. The experimental results revealed that cerium (IV) loaded phosphorylated orange waste indicated excellent fluoride removal efficiency at acidic pH range and while that lanthanum loaded at neutral pH range. Both the metal loaded adsorbents are found superior to the commercially available activated alumina.DOI: http://dx.doi.org/10.3126/jncs.v27i1.6660 J. Nepal Chem. Soc., Vol. 27, 2011 61-66

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29

Ravindra, S. Dhivare, and S. Rajput Shankarsing. "Synthesis and antimicrobial evaluation of some novel bis-heterocyclic chalcones from cyclic imides under microwave irradiation." Chemical Science Review and Letters 4, no. 15 (2015): 937–44. https://doi.org/10.5281/zenodo.3909689.

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Abstract Synthesis of a new series of bis-heterocyclic chalcone derivatives has been reported. The condensation proceeded by the one-pot reaction of N-phenyl succinimides and 4-hydroxy-3-methoxy benzaldehyde in the presence of neutral alumina under microwave irradiation. The advantages of this method are high yield, shorter reaction time, and simple workup procedure. Most of the synthesized compounds have shown moderate to significant antimicrobial activity against different microbial strains.  

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30

R., S. Dhivare, and S. Rajput S. "Microwave assisted synthesis and antimicrobial screening of novel 9-(N-phenyl) - 4, 5-(2″, ‴- methoxyphenol)-9H-1,3,6,8,9-hexa-azo-fluorene-2,7- diamine derivatives using bis-heterocyclic chalcones." INTERNATIONAL JOURNAL OF ADVANCES IN PHARMACY, BIOLOGY AND CHEMISTRY 4, no. 4 (2015): 863–70. https://doi.org/10.5281/zenodo.3909811.

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<strong>ABSTRACT</strong> Amino-pyrimidine derivatives were synthesized by a simple and clean single pot method using bis-chalcones of different substituted phenyl glutarimides and guanidine nitrate with neutral alumina irradiated under the microwave supported solvent less condition is demonstrated. All the compounds were screened for their antimicrobial activities and showed moderate activities. But certain amino-pyrimidines exhibited synergistic and significant activities against <em>Candida albicans</em> and <em>Aspergillus niger</em> fungal genres.

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31

SHAFIULLAH and K. PATHAK R. "A Simple Method for the Transformation of Steroidal Epoxides to Olefins." Journal of Indian Chemical Society Vol. 64, Nov 1987 (1987): 668–69. https://doi.org/10.5281/zenodo.6222365.

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Steroid Research Laboratory, Department of Chemistry, Aligarh Muslim University, Aligarh-202 002 Manuscript <em>received 26 June 1986, revised </em>25 <em>September 1987, accepted 30 October 1987</em> 5,6α-Oxido-5α-cholestane (1) and its 3β-substituted analogues (2 - 4) on silver nitrate-neutral alumina surface were readily converted to cholest-5-ene (5) and its 3<em>β</em>-substituted analogues (6 - 8) in 90 - 95% yield.

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32

Mouradzadegun, Arash, and Fatemeh Abadast. "Expeditious Synthesis of Aromatic Cyanodienones Using Neutral Alumina as a Versatile Heterogeneous Catalyst." Synthetic Communications 44, no. 5 (2013): 640–47. http://dx.doi.org/10.1080/00397911.2013.831103.

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33

Deka, Nabajyoti, and Jadab C. Sarma. "Highly Efficient Dithioacetalization of Carbonyl Compounds Catalyzed with Iodine Supported on Neutral Alumina." Chemistry Letters 30, no. 8 (2001): 794–95. http://dx.doi.org/10.1246/cl.2001.794.

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34

GAO, J., Y. WEI, X. WANG, and W. YANG. "Tungstophosphoric heteropolyacid supported onto neutral alumina: characterization and synthesis of acetals and ketals." Rare Metals 26, no. 2 (2007): 152–57. http://dx.doi.org/10.1016/s1001-0521(07)60176-4.

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35

Bhar, Sanjay, and Subrata Kumar Chaudhuri. "Remarkable reactivity of pyridinium chlorochromate adsorbed on neutral alumina under solvent-free conditions." Tetrahedron 59, no. 19 (2003): 3493–98. http://dx.doi.org/10.1016/s0040-4020(03)00471-x.

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36

Sharma, Pankaj, Samir Vyas, and Anjali Patel. "Heteropolyacid supported onto neutral alumina: characterization and esterification of 1° and 2° alcohol." Journal of Molecular Catalysis A: Chemical 214, no. 2 (2004): 281–86. http://dx.doi.org/10.1016/j.molcata.2003.12.038.

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37

Jeong, Mijeong Lee, Michael Zahn, Thao Trinh, Fay A. Brooke, and Wenwen Ma. "Pesticide Residue Analysis of a Dietary Ingredient by Gas Chromatography/Selected-Ion Monitoring Mass Spectrometry Using Neutral Alumina Solid-Phase Extraction Cleanup." Journal of AOAC INTERNATIONAL 91, no. 3 (2008): 630–36. http://dx.doi.org/10.1093/jaoac/91.3.630.

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Abstract A sample cleanup procedure has been developed to remove coextractives that interfere with pesticide residue analysis of a dietary ingredient (Product B), an extract consisting of Scutellaria baicalensis and Acacia catechu. Samples were extracted using 1 acetic acid in acetonitrile, followed by solid-phase extraction and analysis by capillary gas chromatography with mass spectrometry in the selective-ion monitoring mode. Neutral alumina (alumina N) was found to be the most effective sorbent to remove coextractives from Product B; other materials that were tested but failed to remove in

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38

Parks, Owen W., and Robert C. Doerr. "Liquid Chromatographic Determination of Zoalene and Its Metabolites in Chicken Tissues with Electrochemical Detection." Journal of AOAC INTERNATIONAL 69, no. 1 (1986): 70–71. http://dx.doi.org/10.1093/jaoac/69.1.70.

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Abstract A procedure is described for the quantitation of Zoalene (3,5-dinitro-o-toluamide) and its 2 major monoamino metabolites in chicken tissues. The method includes blender extraction of tissue with chloroformethyl acetate (1 + 1), adsorption of the drug and metabolites on neutral alumina, and subsequent elution of the residues with pH 3.5 formate buffer-methanol (6.5 + 3.5). Recovered residues were separated on a 5 μ C18 column with the alumina eluting solvent as the LC mobile phase. The parent drug and metabolites were detected and quantitated with an electrochemical detector in the red

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39

Clarke, DB, JR Guild, and RT Weavers. "The Chemistry of Laurenene. XIV. New Rearrangements of a Ring A Seco Ester." Australian Journal of Chemistry 45, no. 10 (1992): 1639. http://dx.doi.org/10.1071/ch9921639.

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Adsorption on neutral alumina of a keto ester derived from the diterpene lauren-1-ene has been shown to yield a new keto ester with an unusual bridged tricyclic ring system. With trifluoroacetic acid, both keto esters yield a further new compound which contains a benzene ring. The transformations involved may be rationalized in terms of carbocationic rearrangements. An alcohol derived from the compound with the bridged tricyclic ring system has been converted into a cyclopentacyclononene derivative by β -cleavage of the alkoxy radical.

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40

Yoon, Hyun‐Ho, Jin‐Kyung Kim, and Jong‐Gab Jun. "First Synthesis and Anti‐Inflammatory Effects of Puerariafuran and its Derivatives." Bulletin of the Korean Chemical Society 36, no. 2 (2015): 571–77. http://dx.doi.org/10.1002/bkcs.10109.

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The total synthesis of puerariafuran and its derivatives was achieved for the first time by the direct reaction between substituted α‐bromoacetophenones and resorcinol. The reaction was mediated by neutral alumina and was fully regio‐controlled. Subsequently, the Sonogashira coupling method was applied for puerariafuran preparation. Finally, the anti‐inflammatory effects of these prepared compounds were evaluated in lipopolysaccharide (LPS) stimulated RAW 264.7 macrophages. The results revealed that puerariafuran and its derivatives show weak inhibition activity on the production of inflammato

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41

Zhou, Qi, Ping Zhao, Chun Lin He, and Qing Kui Cai. "Alumina Sol-Gel Film for Pretreatment to Paint on Aluminum Alloy." Advanced Materials Research 239-242 (May 2011): 1678–81. http://dx.doi.org/10.4028/www.scientific.net/amr.239-242.1678.

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Aluminum alloy coatings for pretreatment are developed by sol-gel method. The adhesion between sol-gel film and the paint film was measured by scratching circles and corrosion resistance of sol-gel film was tested by salt spraying experiment. The adhesion between sol-gel film made by pure alumina sol and the paint film was so poor that it is unsuitable for ground coatings, but the composite sol which ultrafine Al2O3 powder was added to pure alumina sol can improve the adhesion and corrosion resistance. If the first layer film is made of pure alumina sol and the second layer is made of composit

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Gallicano, Keith D., Hyun Park, John Yee, Larry M. Young, and Peter W. Saschenbrecker. "Simultaneous Liquid Chromatographic Screening of Five Coccidiostats in Chicken Liver." Journal of AOAC INTERNATIONAL 71, no. 1 (1988): 48–50. http://dx.doi.org/10.1093/jaoac/71.1.48.

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Abstract A reverse-phase liquid chromatographic (LC) method is described for simultaneously determining 5 coccidiostats—aklomide, dinsed, ethopabate, nitromide, and zoalene in chicken liver. The method entails blender extraction of 10 g liver with ethyl acetate, column chromatography through Sephadex LH-20 and neutral alumina, and LC analysis on a C18 column with UV detection at 260 nm. The drugs were eluted from Sephadex with methanol-benzene (10 + 90), from alumina with methanol-dichloromethane (10 + 90), and from C18 with acetonitrile-water (linear gradient: 25% acetonitrile for 10 min, inc

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Sourav, Chatterjee, Banerjee Priyabrata, Sukul Dipankar, and Chattopadhyay Tanmay. "Al2O3 supported-FeIII Schiff base complexes : Syntheses, characterizations and their applications in various oxidation reactions." Journal of Indian Chemical Society Vol. 94, May 2017 (2017): 489–95. https://doi.org/10.5281/zenodo.5625324.

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Department of Chemistry, Panchakot Mahavidyalaya, Purulia-723 121, West Bengal, India Department of Surface Engineering and Tribology, CMERI, Durgapur-713 209, West Bengal, India Department of Chemistry, NIT, Durgapur-713 209, West Bengal, India <em>E-mail</em> : tanmayc2003@gmail.com <em>Manuscript received 21 october 2016, revised 06 January 2017, accepted 21 February 2016</em> Three mononuclear asymmetric Fe<sup>III</sup>-Schiff base complexes, namely FeL<sup>1</sup>Cl , FeL<sup>2</sup>Cl and FeL<sup>3</sup>Cl were prepared. These complexes were loaded over neutral active alumina to prepare

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Anish, Ranjan Ghosh, Biswas Subhadeep, Kumar Nayak Ashish, and Pal Anjali. "Exploring the adsorption and desorption characteristics of lead(II) ions from synthetically contaminated wastewater by anionic surfactant modified neutral alumina." Journal of Indian Chemical Society Vol. 97, No. 12b, Dec 2020 (2020): 2814–19. https://doi.org/10.5281/zenodo.5656232.

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Civil Engineering Department, Indian Institute of Technology Kharagpur, Kharagpur-721 302, West Bengal, India <em>E-mail:</em> anjalipal@civil.iitkgp.ac.in <em>Manuscript received online 08 December 2020, accepted 27 December 2020</em> In our previous studies, it has been shown that anionic surfactant (AS) can be removed from water media by neutral alumina through adsorption and subsequent bilayer formation. In this study, it has been shown that after the AS adsorption, the spent sludge can be used for Pb(II) removal from water. The modified alumina upon surfactant loading (which can be regard

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Tay-Agbozo, Sefadzi S., Matthew D. Krzyaniak, Michael K. Bowman, Shane Street, and Lowell D. Kispert. "DFT and ENDOR Study of Bixin Radical Cations and Neutral Radicals on Silica–Alumina." Journal of Physical Chemistry B 119, no. 24 (2014): 7170–79. http://dx.doi.org/10.1021/jp506806n.

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Jovičević-Klug, Matic, Isnaldi R. Souza Filho, Hauke Springer, Christian Adam, and Dierk Raabe. "Green steel from red mud through climate-neutral hydrogen plasma reduction." Nature 625, no. 7996 (2024): 703–9. http://dx.doi.org/10.1038/s41586-023-06901-z.

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AbstractRed mud is the waste of bauxite refinement into alumina, the feedstock for aluminium production1. With about 180 million tonnes produced per year1, red mud has amassed to one of the largest environmentally hazardous waste products, with the staggering amount of 4 billion tonnes accumulated on a global scale1. Here we present how this red mud can be turned into valuable and sustainable feedstock for ironmaking using fossil-free hydrogen-plasma-based reduction, thus mitigating a part of the steel-related carbon dioxide emissions by making it available for the production of several hundre

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Sabari, Ghosh, Hudrlik Anne, and Mukhopadhyay Chhanda. "Activated alumina ball catalyzed expeditious synthesis of 2-alkylbenzimidazoles with special emphasis on susceptible side chains possessing amide functionality." Journal of Indian Chemical Society Vol. 90, Oct 2013 (2013): 1737–48. https://doi.org/10.5281/zenodo.5791882.

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Department of Chemistry, University of Calcutta, 92, Acharya Prafulla Chandra Road, Kolkata-700 009, India <em>E-mail : </em>cmukhop@yahoo.co.in Department of Chemistry, Howard University, 525 College St., N.W. Washington, D.C. 20059, USA <em>Manuscript received 06 June 2013, accepted 10 June 2013</em> A solvent- and chromatography-free, non-hazardous green protocol for the synthesis of 2-alkylbenzimidazoles has been developed under neutral conditions with water as the only by-product. Activated alumina balls, which have been shown previously to assist in amidation reaction, also catalyze very

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Hao, Bao Hong, Yong Xie, Kai Yuan Mei, and Zhan Min Liu. "The Optimized Assembly Mechanism Research of MorpHology of Hydrothermally Synthesized Nano-Alumina under Neutral Conditions." Advanced Materials Research 893 (February 2014): 170–73. http://dx.doi.org/10.4028/www.scientific.net/amr.893.170.

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This paper adopts a multi-component composite addition mode of adding polar and apolar additives with complementary advantages to manufacture a space for metastable pHase,and enhance the coordination ability of the surface of the environmental media ,in order to overcome the present method that whiskers nano-alumina were prepared under acidic conditions and the sheets were prepared under alkaline conditions. In addition, based on isomorpHous replacement of polar iron ions and intercalation of sulfate ions, this paper fully exerts the restoration function of crystal morpHology on apolar surfact

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Sulakshana, Karmakar, and Chakrabarty Manas. "Reaction of diethyl mesoxalate with active methylene compounds : an interesting outcome." Journal of Indian Chemical Society Vol. 85, Feb 2008 (2008): 224–27. https://doi.org/10.5281/zenodo.5808975.

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Department of Chemistry, Bose Institute, 93/1, Acharya Prafulla Chandra Road, Kolkata-700 009, India <em>E-mail :</em> chakmanas@yahoo. co. in         Fax : 91-33-23506790 <em>Manuscript received 26 November 2007, accepted 19 December 2007</em> Diethyl mesoxalate reacts separately with each of Meldrum's acid, indan-1,3-dione and diethyl malonate - all active methylene compounds - on neutral alumina either at room temperature or under microwave irradiation to furnish expeditiously the corresponding tertiary carbinols in very good yields. However, when the reaction o

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Abdelmonem, Ahmed, Ellen H. G. Backus, Nadine Hoffmann та ін. "Surface-charge-induced orientation of interfacial water suppresses heterogeneous ice nucleation on <i>α</i>-alumina (0001)". Atmospheric Chemistry and Physics 17, № 12 (2017): 7827–37. http://dx.doi.org/10.5194/acp-17-7827-2017.

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Abstract. Surface charge is one of the surface properties of atmospheric aerosols, which has been linked to heterogeneous ice nucleation and hence cloud formation, microphysics, and optical properties. Despite the importance of surface charge for ice nucleation, many questions remain on the molecular-level mechanisms at work. Here, we combine droplet-freezing assay studies with vibrational sum frequency generation (SFG) spectroscopy to correlate interfacial water structure to surface nucleation strength. We study immersion freezing of aqueous solutions of various pHs on the atmospherically rel

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