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Journal articles on the topic 'Characterization of ammonium acetate'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Liu, Yan Yan, and Dian Mo Zheng. "Research on Preparation, Characterization of Novel Nano-ZnO." Advanced Materials Research 311-313 (August 2011): 549–54. http://dx.doi.org/10.4028/www.scientific.net/amr.311-313.549.

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Zinc acetate and ammonium bicarbonate are used as raw material, zinc oxide prepared by direct precipitation of new technology. This paper discusses the effection of the formation in zinc oxide from the reactant concentration of zinc acetate, HCO3-/Zn2+ molarity ratio, reaction temperature, reaction time and condition in thermal decomposition of basic zinc carbonate. Using transmission electron microscopy (TEM), thermogravimetric / differential thermal analysis (TG / DTA) and other methods, preparation of nano-ZnO are characterized. Good conditions for the better system of nano- ZnO are 0.75mol

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2

Liu, YuXiang, YaQing Li, and YongKang Lv. "Isolation and characterization of a heterotrophic nitrifier from coke plant wastewater." Water Science and Technology 65, no. 11 (2012): 2084–90. http://dx.doi.org/10.2166/wst.2012.120.

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This study investigated some factors affecting ammonium removal and nitrite accumulation by Alcaligenes faecalis C16, which was isolated from the activated sludge of a coking wastewater treatment plant. Nitrite was produced from ammonium only in the presence of citrate, acetate, meat extract, peptone or ethanol. The highest amount of nitrite was found with citrate as carbon source. A. faecalis C16 could not use glucose, fructose, sucrose and methanol. Under the optimum conditions of initial pH 6.0, C/N 14, 30 °C and 120 rpm, a maximum nitrite accumulation of 28.29 mg/L NO2−-N was achieved when

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3

Zhao, Yan-Chao, Tao Wang, Li-Min Zhang, Yi Cui, and Bao-Hang Han. "Microporous spiro-centered poly(benzimidazole) networks: preparation, characterization, and gas sorption properties." Polymer Chemistry 6, no. 5 (2015): 748–53. http://dx.doi.org/10.1039/c4py00954a.

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Three microporous spiro-centered poly(benzimidazole) networks were synthesized based on the condensation of di-/trialdehyde with 3,3,3′,3′-tetramethyl-1,1′-spirobisindane-5,5′,6,6′-tetrone in refluxing glacial acetic acid containing ammonium acetate.

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4

Nimbalkar, Seijas, Vazquez-Tato, and Nikalje. "Ultrasound-Assisted One Pot Synthesis of Novel 5-(1-(Substituted phenyl)-4,5-diphenyl-1H-imidazol-2-yl)-4-methylthiazole." Proceedings 9, no. 1 (2018): 63. http://dx.doi.org/10.3390/ecsoc-22-05795.

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This work reports synthesis of ten novel derivatives of 5-(1-(substituted phenyl)-4,5-diphenyl-1H-imidazol-2-yl)-4-methylthiazole 5(a–o). The reaction of benzil, primary aryl amines, 4-methylthiazole-5-carbaldehyde and ammonium acetate was carried out in one pot in the presence of eco-friendly catalyst Ceric ammonium nitrate in solvent ethanol to give final compounds. The structures of the synthesized compounds were confirmed by spectral characterization such as IR, 1H-NMR, 13C-NMR and mass spectral studies.

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5

Pires, Ianê Valente, Yasmin Caroline Nóvoa Sakurai, Nelson Rosa Ferreira, Sanclayton Geraldo Carneiro Moreira, Antonio Manoel da Cruz Rodrigues, and Luiza Helena Meller da Silva. "Elaboration and Characterization of Natural Deep Eutectic Solvents (NADESs): Application in the Extraction of Phenolic Compounds from pitaya." Molecules 27, no. 23 (2022): 8310. http://dx.doi.org/10.3390/molecules27238310.

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In this paper, natural deep eutectic solvents (NADESs) with lactic acid, glycine, ammonium acetate, sodium acetate, and choline chloride were prepared with and without the addition of water. NADES formation was evaluated using FTIR and Raman, where hydrogen bonds were identified between the hydroxyl group of lactic acid and the amino and carboxyl groups of glycine. Acetate and ammonium ions were also identified as forming bonds with lactic acid. The addition of water did not cause changes in the vibrational modes of the FTIR and Raman spectra but contributed to a reduction in NADES viscosity a

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6

Mi, Yingqi, Wenqiang Tan, Jingjing Zhang, et al. "Synthesis, Characterization, and Antifungal Property of Hydroxypropyltrimethyl Ammonium Chitosan Halogenated Acetates." Marine Drugs 16, no. 9 (2018): 315. http://dx.doi.org/10.3390/md16090315.

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Hydroxypropyltrimethyl ammonium chitosan halogenated acetates were successfully synthesized from six different haloacetic acids and hydroxypropyltrimethyl ammonium chloride chitosan (HACC) with high substitution degree, which are hydroxypropyltrimethyl ammonium chitosan bromacetate (HACBA), hydroxypropyltrimethyl ammonium chitosan chloroacetate (HACCA), hydroxypropyltrimethyl ammonium chitosan dichloroacetate (HACDCA), hydroxypropyltrimethyl ammonium chitosan trichloroacetate (HACTCA), hydroxypropyltrimethyl ammonium chitosan difluoroacetate (HACDFA), and hydroxypropyltrimethyl ammonium chitos

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7

Berghuis, Nila Tanyela, Shanny Fridarima, Elvira Nur Rachmadhanti, Sudaryanto Sudaryanto, and Sun Theo Constan Lotebulo Ndruru. "Preparation of Proton-Conducting Solid Electrolyte Membrane Based on Carboxymethyl Chitosan Complexed with Ammonium Acetate." Molekul 19, no. 3 (2024): 523. https://doi.org/10.20884/1.jm.2024.19.3.11056.

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This research aims to prepare the proton-conducting solid electrolyte membrane based on carboxymethyl chitosan (CMCh) complexed with ammonium acetate (CH3COONH4). The membranes were prepared by using casting solution technique where the various weight percentages of ammonium acetate mixed to CMCh for obtaining optimum condition based on ionic conductivity analysis. Some characterizations were conducted to analysis the functional groups (involving complexation studies), ionic conductivities, mechanical properties, crystallinities, and thermal analysis by using FTIR, EIS, tensile tester, XRD, an

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8

Fan, Rui, and Jin Shui Yao. "Synthesis and Characterization of Optically Active Poly(N-Acryloyl-L-alanine) in Ionic Lliquids." Advanced Materials Research 1035 (October 2014): 464–68. http://dx.doi.org/10.4028/www.scientific.net/amr.1035.464.

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The chiral monomer,N-acryloyl-L alanine, was synthesized by condensation reaction between acryloyl chloride and L-alanine using ethyl acetate and water as two-phase solvents, tetrabutyl ammonium bromide as phase transfer catalyst and ethyl acetate as the extraction solvent.And then, poly (N-acryloyl-L-alanine) was successfully prepared by free radical polymerization of above synthesized monomer using 2,2'-Azobis (2-methylpropionitrile) AIBN as initiator in ionic liquids. Their structures were characterized by1HNMR and IR. Optically activities were tested with Rotary Spectrometer. Melting point

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9

Kavitha, T., G. Pasupathi, R. Gowri Shankar Rao, and N. Kanagathara. "Growth and Characterization of L-Histidinium Ammonium Acetate Nonlinear Optical Single Crystal." Acta Physica Polonica A 136, no. 3 (2019): 395–99. http://dx.doi.org/10.12693/aphyspola.136.395.

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10

Makó, Éva, András Kovács, Zoltán Ható, Balázs Zsirka, and Tamás Kristóf. "Characterization of kaolinite–ammonium acetate complexes prepared by one-step homogenization method." Journal of Colloid and Interface Science 431 (October 2014): 125–31. http://dx.doi.org/10.1016/j.jcis.2014.06.006.

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11

Journal, Baghdad Science. "Synthesis and Characterization of Some New Morpholine Derivatives." Baghdad Science Journal 13, no. 2 (2016): 253–65. http://dx.doi.org/10.21123/bsj.13.2.253-265.

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In this paper a new series of morpholine derivatives was prepared by reacting the morpholine with ethyl chloro acetate in the presence triethylamine as a catalyst in benzene gave morpholin-N-ethyl acetate(1) which reacted with hydrazine hydrate in ethanol, and gave morpholin-N-ethyl acetohydrazide (2) . Morpholin-N-aceto semithiocarbazide (3) were prepared by reacting compound(2) with ammonium thiocyanate , concentrated hydrochloric acid and ethanol as a solvent .Compound (3) reacted with sodium hydroxide and hydrochloric acid to give 5-(morpholin-N-methylene)-1H-1,2,4-triazole-3-thiol (4) .Th

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12

Rodríguez, Diego Fernando, Kelly Johanna Lipez, Elena Stashenko, Iván Díaz, Justo Cobo, and Alirio Palma. "Alternative and efficient one-pot three-component synthesis of substituted 2-aryl-4-styrylquinazolines/4-styrylquinazolines from synthetically available 1-(2-aminophenyl)-3-arylprop-2-en-1-ones: characterization and evaluation of their antiproliferative activities." RSC Advances 14, no. 29 (2024): 20951–65. http://dx.doi.org/10.1039/d4ra03702b.

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The AcONH4-promoted and catalyst-free one-pot three-component synthesis of diverse substituted 4-styrylquinazolines have been developed from 2′-aminochalcones, aromatic aldehydes/trimethyl orthoformate, and ammonium acetate.

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13

Aprilian, Rafly, Mas Ayu Elita Hafizah, Azwar Manaf, and Andreas. "Conversion Enhancement of Vinyl Acetate Monomer to Polyvinyl Acetate Emulsion through Emulsion Polymerization Method." Materials Science Forum 1028 (April 2021): 263–68. http://dx.doi.org/10.4028/www.scientific.net/msf.1028.263.

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Synthesis of Polyvinyl Acetate (PVAc) through the conversion of Vinyl Acetate Monomer (VAM) was carried out by emulsion polymerization method assisted by thermal initiator Ammonium persulfate (APS) under reaction temperature was kept at 70 °C – 80 °C with 5 hours of reaction time and agitation speed at 300 rpm. The polymerization reaction was running used batch process technique where is all components were mixed all together simultaneously. A set of polymerization reactions was conducted when the absence of surfactant and cationic and amphoteric surfactant presence. The monomer chain's double

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14

Khurram, Shahzad, Abbas Faheem, Pandey Digvijay, Ajmal Sanila, Khadim Mudassar, and Usman Tahir Muhammad. "Synthesis, characterization and biological evaluation of novel tetrasubsituted Imidazole compounds." Journal of PeerScientist 3, no. 1 (2020): e1000019. https://doi.org/10.5281/zenodo.3901332.

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New classes of tetrasubsituted imidazole based compounds were synthesized using multicomponent one pot synthesis scheme through cyclocondensation reaction of benzil, aromatic primary amines, aldehydes and ammonium acetate in glacial acetic acid. The synthesized compounds have been analyzed and characterized by melting point, color, conductivity method, CHN analysis, FT-IR and UV-Visible. The reaction proceeding was examined by TLC after regular intervals of period. To test biological activity, the synthesized compounds have been examined against various bacterial strains. From the analysis of

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15

Xie, Zhen Hai, and Jian Kang Li. "Preparation and Characterization of Chemical Bath Deposited CdS Thin Films for Solar Cells." Materials Science Forum 743-744 (January 2013): 438–42. http://dx.doi.org/10.4028/www.scientific.net/msf.743-744.438.

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Chemical bath deposition of CdS thin film for solar cells was investigated in this study. CdS thin films were prepared by chemical-bath deposition (CBD) from a bath containing cadmium acetate, ammonium chloride, ammonium hydroxide and thiourea in aqueous solution on the glass substrate at certain bath temperature. The characterization of samples was conducted by using different methods such as scanning electron microscopy (SEM), X-ray diffraction (XRD) and ultraviolet spectrophotometry (UV). The crystal quality of CdS thin films was improved after CdCl2 thermal annealing at 400C. The results s

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16

Ndruru, Sun Theo Constan Lotebulo, Elvira Nur Rachmadhanti, Shanny Fridarima, et al. "Molecular Vibration and Physicochemical Performance of Proton-Conducting Solid Polymer Electrolyte Membrane based on CMC/PVA/CH3COONH4." Molekul 19, no. 3 (2024): 489. https://doi.org/10.20884/1.jm.2024.19.3.11001.

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This work studied examined the influence of ammonium acetate (CH3COONH4) on CMC/PVA-based solid polymer electrolyte (SPE) membranes, focusing on molecular vibration, proton conductivity, and physicochemical properties. SPE membranes were prepared via the casting solution method with varying CH3COONH4 concentrations to determine the optimal proton conductivity. Various characterizations, including FTIR, EIS, XRD, and TGA, were performed. The optimal membrane condition was achieved with 10 wt-% CH3COONH4 in the CMC/PVA (80/20) blend, yielding proton conductivity of 3.93×10⁻⁴ S/cm and favorable m

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17

Pandey, Himanshu, Kaushal Kumar, Neha Mishra, Ritu Yadav, and S. P. Shrivastava. "Sonochemical Synthesis, Characterization and Molecular Docking of Thiazole and Triazole Tethered Tetra-Substituted Imidazoles." Oriental Journal Of Chemistry 38, no. 6 (2022): 1445–52. http://dx.doi.org/10.13005/ojc/380616.

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Sonochemical synthesis of tetra-substituted imidazole derivatives tethered with thiazole and triazole moieties carried out by condensation reaction, involving aldehyde, benzil, ammonium acetate and selected amino azole moiety with brick clay as catalyst. The synthesized tetra-substituted imidazole derivatives were characterized using FT-IR, NMR spectroscopy. Molecular docking studies of the synthesized tetra-substituted imidazole derivatives for their antimicrobial potency were also performed. These derivatives scored satisfactorily and can be the possible lead for the future drug candidate ag

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18

Park, Ji Young, Seong Geun Oh, and Baik Hyon Ha. "Characterization of iron(III) oxide nanoparticles prepared by using ammonium acetate as precipitating agent." Korean Journal of Chemical Engineering 18, no. 2 (2001): 215–19. http://dx.doi.org/10.1007/bf02698462.

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19

Zhang, Yifu, Wenkai Bei, and Zhiyong Qin. "Preparation and Characterization of Soap-Free Vinyl Acetate/Butyl Acrylate Copolymer Latex." Materials 13, no. 4 (2020): 865. http://dx.doi.org/10.3390/ma13040865.

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The soap-free emulsion of vinyl acetate (VAc)/butyl acrylate (BA) copolymer was prepared by a semi-continuous and pre-emulsification polymerization method, using ammonium sulfate allyloxy nonylphenoxy poly(ethyleneoxy) (10) ether (DNS-86) as a reactive emulsifier. The effects of DNS-86 on the stability of the emulsion and the properties of the latex film were investigated. The infrared spectrum, thermal stability, glass transition temperature and micromorphology of latex were also studied. The results showed that the emulsion had the best stability and the conversion rate reached a maximum of

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20

Hitesh, B. Vala, Upadhayay Jatin, and Rajyaguru Cheatana. "Synthesis, Characterization and Antimicrobial Activity of Some New Dihydropyridine Derivatives." Pharmaceutical and Chemical Journal 7, no. 6 (2020): 1–5. https://doi.org/10.5281/zenodo.13956338.

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Synthesis  of 4-(3-(aryl)–1–phenyl-1<em>H</em>–pyrazol–4–yl)-3,5–dimethyl-1,4,7,8–tetrahydro dipyrazolo [3,4-b:4',3'-e] pyridine by the reaction of different substituted 3-(aryl)–1-phenyl-1<em>H</em>-pyrazole-4-carbaldehyde with 2 mole of 3-methyl-1<em>H</em>-pyrazol-5(4<em>H</em>)-one in presence of ammonium acetate and methanol as a solvent. The constitution of all the synthesized compounds has been characterized by using IR, MASS,<sup> 1</sup>H<sup> </sup>NMR spectroscopy. All synthesized compounds were screened for their antimicrobial ac

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21

Chen, Yinyan, Peng Jin, Zhiwen Cui, Tao Xu, Ruojin Zhao, and Zhanwang Zheng. "Identification and Characterization of Janthinobacterium svalbardensis F19, a Novel Low-C/N-Tolerant Denitrifying Bacterium." Applied Sciences 9, no. 9 (2019): 1937. http://dx.doi.org/10.3390/app9091937.

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Herein, we isolated Janthinobacterium svalbardensis F19 from sludge sediment. Strain F19 can simultaneously execute heterotrophic nitrification and aerobic denitrification under aerobic conditions. The organism exhibited efficient nitrogen removal at a C/N ratio of 2:1, with an average removal rate of 0.88 mg/L/h, without nitrite accumulation. At a C/N ratio of 2, an initial pH of 10.0, a culturing temperature of 25 °C, and sodium acetate as the carbon source, the removal efficiencies of ammonium, nitrate, nitrite, and hydroxylamine were 96.44%, 92.32%, 97.46%, and 96.69%, respectively. The ma

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22

He, Quan Guo, and Zhao Hui Wu. "Solvothermal Fabrication of Hollow Porous Magnetite Particles." Advanced Materials Research 183-185 (January 2011): 1995–99. http://dx.doi.org/10.4028/www.scientific.net/amr.183-185.1995.

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Hollow porous magnetite spheres were synthesized by a simple solvothermal route with controllable size ranging from 80 nm to 400 nm. The size, shell thickness and the interior space of the resulted crystals were controlled by reaction time, molar ratio of ammonium bicarbonate (NH4HCO3) and ammonium acetate (NH4Ac). The structure, morphology, size, and magnetic properties of the hollow porous magnetite spheres were investigated. The characterizations of Scanning electron microscopy (SEM) and Transmission electron microscopy (TEM) images showed that ratio of NH4HCO3 and NH4Ac, and molar concentr

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23

Ahmad, Ahyar, and Harningsih Karim. "Purification and Characterization of Amyloglucosidase Enzyme from the Thermophilic Endomycopsis fibuligera Using Sago Starch as a Substrate." Indonesian Journal of Chemistry 16, no. 3 (2018): 302. http://dx.doi.org/10.22146/ijc.21147.

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An investigation on purification and characterization of amyloglucosidase enzyme from Endomycopsis fibuligera by fermentation of sago starch has been carried out. This enzyme is inductive and can be produced by fermenting sago starch in a medium containing E. fibuligera. Crude enzyme was obtained by centrifuging the medium cultures containing E. fibuligera at 6,000 rpm for 20 min and then adding with 0.15 M acetate buffer (pH 5.0). Enzyme activity was determined using Somogyi-Nelson method by quantifying the released glucose from amyloglucosidase catalysis of starch (0.2%) as substrate. Prepur

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24

S., Anitha, Ganapathi M., and Ravi A. "SYNTHESIS OF SUBSTITUTED SULFONAMIDE BEARING IMIDAZOLE DERIVATIVES AND ITS CHARACTERIZATION." International Journal of Applied and Advanced Scientific Research 1, no. 2 (2017): 1–4. https://doi.org/10.5281/zenodo.256148.

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The sulfonamide bearing imidazole derivatives have been synthesized via two stages of chemical reactions. In a first stage, various substituted benzaldehyde condensed with benzil and ammonium acetate in presence L-Proline served as green catalyst. In a second stage, the series of substituted imidazole derivatives were reacted with benzene sulfonyl chloride in the presence of triethyl amine base. All synthesized compounds were characterized by various spectral techniques like UV-Visible, FTIR and <sup>1</sup>H NMR spectral analysis respectively. UV- Visible and FTIR spectra of each of the synth

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25

Yang, Mengqiong, Guangming Mei, Daoxiang Huang, Xiaojun Zhang, Pengfei He, and Si Chen. "Matrix Interference Removal Using Fe3O4@SiO2-PSA-Based Magnetic Dispersive Solid-Phase Extraction for UPLC-MS/MS Analysis of Diazepam in Aquatic Products." Foods 14, no. 14 (2025): 2421. https://doi.org/10.3390/foods14142421.

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A sensitive method was developed for detecting diazepam residues in aquatic products using magnetic dispersive solid-phase extraction (MDSPE) coupled with ultra-performance liquid chromatography–tandem mass spectrometry (UPLC-MS/MS). Samples extracted with 1% ammonia–acetonitrile were purified using synthesized Fe3O4@SiO2-PSA nanoparticles via MDSPE before UPLC-MS/MS analysis. Separation was performed on a C18 column with gradient elution using 0.1% formic acid–2 mM ammonium acetate/methanol. Detection employed positive electrospray ionization (ESI+) in multiple reaction monitoring (MRM) mode.

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26

Pandey, Himanshu, and S. P. Shrivastava. "One Pot Synthesis, Characterization of Benzothiazole/ Benzimidazole Tethered Imidazole Derivatives using Clay as Catalyst." Oriental Journal Of Chemistry 37, no. 3 (2021): 583–88. http://dx.doi.org/10.13005/ojc/370309.

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A Green approach for benzothiazole / benzimidazole tethered imidazole derivative synthesis utilizing brick derived clay as a catalyst. Brick clay catalyst used in this synthesis has shown excellent catalytic activity by increasing efficiency, reducing the reaction time and most importantly it is reusable for further reaction runs. These derivatives were synthesized by four component condensation reaction that involvebenzil, aldehyde, 2-aminobenzimidazole / 2-amino-6-nitrobenzothiazole and ammonium acetate. The clay catalyst is characterized by FT-IR while the synthesized derivatives were chara

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27

Zhang, Hong Bo, Chun Hui Su, and Xiao Wei Zhu. "Synthesis and Characterization of the Sizing Agents on the Carbon Fibers." Advanced Materials Research 233-235 (May 2011): 70–73. http://dx.doi.org/10.4028/www.scientific.net/amr.233-235.70.

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The recent development of carbon fiber sizing agent was introduced in this article. The sizing agent used in carbon fiber was synthesized at a temperature range of 55-60°C using epoxy resin and vinyl acetate as a monomer together, octyl phenol ethoxylated(OP-10) as the emulsion agent, ammonium peroxydisulfate as the solicitation agent and water as the dispersant. At the same time, the optimum composition, the optimum process condition and the effects affecting the emulsion stability were discussed. The characterizations were measured by Scanning Electron Microscopy and TG. The results show tha

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28

Hemmesi, Leila. "Preparation and Characterization of NiCoFe2O4 Nanoparticles as an Effective Catalyst for the Synthesis of Trisubstituted Imidazole Derivatives Under Solvent-free Conditions." Acta Chimica Slovenica 69, no. 4 (2022): 876–83. http://dx.doi.org/10.17344/acsi.2022.7633.

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In this study, NiCoFe2O4 nanoparticles were prepared and used as a reactive catalyst for the synthesis of trisubstituted imidazoles. The multicomponent reactions of aromatic aldehydes, benzil and ammonium acetate were carried out under solvent-free and conventional heating conditions. In this reaction, some imidazole derivatives with high purity, short reaction times and high yields were obtained. The prepared nanocatalyst was characterized by FT-IR, XRD, EDX, VSM and SEM techniques. Moreover, the organic products were identified by melting point, FT-IR and 1H NMR analyzes.

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29

Zoratto, Samuele, Thomas Heuser, Gernot Friedbacher, et al. "Adeno-Associated Virus-like Particles’ Response to pH Changes as Revealed by nES-DMA." Viruses 15, no. 6 (2023): 1361. http://dx.doi.org/10.3390/v15061361.

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Gas-phase electrophoresis on a nano-Electrospray Gas-phase Electrophoretic Mobility Molecular Analyzer (nES GEMMA) separates single-charged, native analytes according to the surface-dry particle size. A volatile electrolyte, often ammonium acetate, is a prerequisite for electrospraying. Over the years, nES GEMMA has demonstrated its unique capability to investigate (bio-)nanoparticle containing samples in respect to composition, analyte size, size distribution, and particle numbers. Virus-like particles (VLPs), being non-infectious vectors, are often employed for gene therapy applications. Foc

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Hamaguchi, Yukiyoshi, Masuichi Ohi, Yasuo Sakakura, and Yasuro Miyoshi. "Purification and Characterization of Tissue-Type Plasminogen Activator in Maxillary Mucosa with Chronic Inflammation." Thrombosis and Haemostasis 54, no. 02 (1985): 485–89. http://dx.doi.org/10.1055/s-0038-1657879.

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SummaryTissue-type plasminogen activator (TPA) was purified from maxillary mucosa with chronic inflammation and compared with urokinase. Purification procedure consisted of the extraction from delipidated mucosa with 0.3M potassium acetate buffer (pH 4.2), 66% saturation of ammonium sulfate, zinc chelate-Sepharose, concanavalin A-Sepharose and Sephadex G-100 gel filtration chromatographies.The molecular weight of the TPA was approximately 58,000 ± 3,000. Its activity was enhanced in the presence of fibrin and was quenched by placental urokinase inhibitor, but not quenched by anti-urokinase ant

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Shimizu, Michiko, Rubén Álvarez-Asencio, Niklas Nordgren, and Akira Uedono. "Preparation and characterization of cellulose acetate membranes with TEMPO-oxidized cellulose nanofibrils containing alkyl ammonium carboxylates." Cellulose 27, no. 3 (2019): 1357–65. http://dx.doi.org/10.1007/s10570-019-02872-5.

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Sayahi, Mohammad Hosein, Mahtab Yadollahi, Samir M. Hamad, et al. "Bi Metal–Organic Framework (Ce/Ni–BTC) as Heterogeneous Catalyst for the Green Synthesis of Substituted Chromeno[4, 3–b]quinolone under Solvent Free Condition." Current Organic Synthesis 18, no. 5 (2021): 475–82. http://dx.doi.org/10.2174/1570179418666210122100240.

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Aims: Novel bi metal organic framework (b–MOF) is synthesized and used as a heterogeneous catalyst for the synthesis of chromeno[4, 3–b]quinolone derivatives via one-pot and solvent-free, four-component reaction of dimedone, aromatic aldehydes, 4–hydroxycoumarin and ammonium acetate at 110°C. Background: b–MOFs can be used as a heterogeneous catalyst in the synthesis of many organic compounds. The active and multi-purpose sites in b–MOFs provide a varied function in their catalytic applications. In this paper, reductive CES method is applied for the synthesis of Ce0.47/Ni0.53–BTC b–MOF. The re

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33

Golden, K. D., and J. Smith-Marshall. "Characterization of Bromelain from Morinda citrifolia (Noni)." Journal of Scientific Research 4, no. 2 (2012): 445. http://dx.doi.org/10.3329/jsr.v4i2.8125.

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Morinda citrifolia from the Rubiaceae family, collected in parish of St. Andrew, Jamaica, West Indies, was investigated for the presence of the Bromelain-like protein enzyme. In the process Bromelain from Morinda citrifolia was partially purified and characterized. Fresh plant material was extracted in buffer (sodium acetate-acetic acid (10mM), L-cysteine (1mM), and sodium chloride (0.1M), freeze dried and analyzed using column chromatography and assayed using spectrophotometry in a five step procedure. The major purification steps involved were ammonium sulphate precipitation, gel-filtration

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34

Baghel, Madhuri, Meenakshi Bharkatiya, Falguni Tandel, and Sadhana J. Rajput. "Isolation and Characterization of Novel Degradation Product of Pidotimod." Asian Journal of Chemistry 34, no. 9 (2022): 2386–92. http://dx.doi.org/10.14233/ajchem.2022.23878.

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A synthetic dipeptide, pidotimod (3-L-pyroglutamyl-L-thiaziolidine-4-carboxylic acid, PTD) is an immunomodulator and it possesses anti-infective activity against variety of infections. The objective of this study was to explore into and identify pidotimod’s major degradation product. Pidotimod was degraded in ICH prescribed stress conditions. pidotimod was degraded 90% in 1.0 N NaOH at 80 ºC for 6 h and the degradation product (DP2) was determined using HPLC. The HPLC method was used to separate the primary and subsidiary degradation products and carried out on a C18 column with a mobile phase

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Hashemi-Uderji, Somayeh, Mohammad Abdollahi-Alibeik, and Reza Ranjbar-Karimi. "FSM-16-SO3H nanoparticles as a novel heterogeneous catalyst: preparation, characterization, and catalytic application in the synthesis of polyhydroquinolines." Main Group Metal Chemistry 41, no. 3-4 (2018): 91–101. http://dx.doi.org/10.1515/mgmc-2018-0006.

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Abstract FSM-16-SO3H nanoparticles were prepared using a sol-gel method at room temperature. The prepared FSM-16-SO3H was used to catalyze the synthesis of polyhydroquinolines through a one-pot, four-component reaction of aldehydes, dimedone, ethyl cyanoacetate, and ammonium acetate under reflux condition in EtOH as a green solvent. To investigate the textural properties of the prepared catalyst, various techniques were applied such as X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscope, and Brunauer–Emmett–Teller. High catalytic activity, easy handling, an

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Pandya, Mahesh K., Tapan H. Parekh, Mehulsinh R. Chhasatia, and Nileshkumar D. Vala. "Synthesis and characterization of some novel coumarin based various 2-aryl-pyrido [3,2-c] coumarins." Journal of Drug Delivery and Therapeutics 10, no. 2 (2020): 158–63. http://dx.doi.org/10.22270/jddt.v10i2.3933.

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A survey of the literature reveals that the number of coumarin derivatives having heterocyclic moieties either as substituent groups or fused with parent coumarin nucleus possesses a variety of functions and are widely used in drugs and dyes. Because of this wide utility, the synthesis of coumarin has remained a subject of active interest. Looking at the importance of these heterocoumarins and with a view to exploring new methods of their synthesis, the present work was undertaken and this synthesis deals with various 2-aryl-pyrido [3,2-c] coumarins. The compounds have been synthesized by reac

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Andrews, S. B., R. D. Leapman, P. E. Gallant, and T. S. Reese. "Characterization of microtubules by dark-field STEM and replication." Proceedings, annual meeting, Electron Microscopy Society of America 49 (August 1991): 152–53. http://dx.doi.org/10.1017/s042482010008506x.

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As part of a study on protein interactions involved in microtubule (MT)-based transport, we used the VG HB501 field-emission STEM to obtain low-dose dark-field mass maps of isolated, taxol-stabilized MTs and correlated these micrographs with detailed stereo images from replicas of the same MTs. This approach promises to be useful for determining how protein motors interact with MTs. MTs prepared from bovine and squid brain tubulin were purified and free from microtubule-associated proteins (MAPs). These MTs (0.1-1 mg/ml tubulin) were adsorbed to 3-nm evaporated carbon films supported over Form

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Jang, Seok-In, Han Young Eom, Jeong Ho Hwang, Lila Kim, and Jong-Hwa Lee. "Simultaneous Quantification of 3′- and 6′-Sialyllactose in Rat Plasma Using Liquid Chromatography-Tandem Mass Spectrometry and Its Application to a Pharmacokinetic Study." Molecules 26, no. 4 (2021): 1177. http://dx.doi.org/10.3390/molecules26041177.

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Sialyllactose (SL), an acidic oligosaccharide, has immune-protective effects against pathogens and helps with the development of the immune system and intestinal microorganisms. To elucidate the pharmacokinetic characterization after oral administration to rats, the simultaneous quantification method for 3′-SL and 6′-SL in rat plasma was validated, using liquid chromatography-tandem mass spectrometry (LC-MS/MS) in an electrospray ionization (ESI) mode. Several types of columns [C18, amide, and hydrophilic interaction liquid chromatography (HILIC) phase] were used to separate the peaks of 3′-SL

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Bhardwaj, Kamal K., Adarsh Dogra, Smita Kapoor, Akshita Mehta, and Reena Gupta. "Purification and Properties of an Esterase from Bacillus licheniformis and it’s Application in Synthesis of Octyl Acetate." Open Microbiology Journal 14, no. 1 (2020): 113–21. http://dx.doi.org/10.2174/1874285802014010113.

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Background: Esterase plays a major role in the degradation of natural materials, industrial pollutants and also provides an immense contribution to the eco-friendly approaches in various industrial applications. Objective: In the present study, extracellular esterase from bacterial isolate Bacillus licheniformis was purified, characterized and used in the synthesis of octyl acetate. Methods: Purification of esterase from Bacillus licheniformis was achieved using Sephadex G-75 column chromatography. Gas chromatography was used to analyze the octyl acetate synthesis. Results: The enzyme was salt

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Watt, S. L., and R. Auerbach. "A mitogenic factor for endothelial cells obtained from mouse secondary mixed leukocyte cultures." Journal of Immunology 136, no. 1 (1986): 197–202. http://dx.doi.org/10.4049/jimmunol.136.1.197.

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Abstract Supernatants from secondary mixed leukocyte cultures (MLC) are capable of stimulating both endothelial cell proliferation and endothelial cell chemokinesis. The proliferation factor(s) has been subject to further biochemical characterization. At least one factor is precipitable by 30% ammonium sulfate, a procedure that separates this factor from the chemokinesis-inducing factor(s) and most other growth-stimulating lymphokines. The partially purified lymphokine preparation can stimulate growth of microvascular endothelial cells, yet fails to induce proliferation of large vessel endothe

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Nomwesigwa, Cathbert, Nehad Noby, Sherif Hammad, and Ahmed Abdel-Mawgood. "Screening for Extremophilic Lipase Producing Bacteria: Partial Purification and Characterization of Thermo-Halophilic, Solvent Tolerant Lipase from Bacillus sp." International Journal of Engineering and Technology 15, no. 1 (2023): 7–11. http://dx.doi.org/10.7763/ijet.2023.v15.1210.

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The introduced study aims to isolate potent lipase producing strain from extreme habitats. The aim is extended to characterize the produced enzyme with respect to the effect of salt, temperature, pH and different organic solvents. Tween 80 plate method was used for discriminating lipase producing strains in the isolation step. Lipase activity of the selected isolates was confirmed through Rhodamine B plate assay. The enzyme of the most potent isolate was partially purified using 80% ammonium sulphate, quantified, and characterized using the synthetic substrate, para nitrophenyl laurate (pNP-C1

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Choi, Seong Yong, та Kenneth C. Gross. "PURIFICATION AND CHARACTERIZATION OF N-ACETYL-β-d-GLUCOSAMINIDASE FROM `GOLDEN DELICIOUS' APPLES." HortScience 28, № 5 (1993): 587d—587. http://dx.doi.org/10.21273/hortsci.28.5.587d.

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The ripening-related biological activity (Priem and Gross, 1992, Plant Physiol 98:399-401) of free N-glycans in fruit was recently reported. Thus, enzymes involved in N-glycan metabolism may be important in understanding the regulation of ripening. N-acetyl-β-D-glucosaminidase (EC 3.2.1.30) was purified to homogeneity and characterized from climacteric `Golden Delicious' apple (Malus domestica Borkh.) fruit tissue. This enzyme cleaves terminal N-acetylglucosaminyl residues from the non-reducing end of glycans. The enzyme was extracted in 25 mM Na-acetate (pH 5.0) containing 2% PVP, 0.1 mM EDTA

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K., Pruthviraj, Lohith T. N., Yeshwanth M., et al. "MOLECULAR IODINE CATALYZED SOLVENT FREE ONE POT SYNTHESIS, CHARACTERIZATION, INSILICO ADME, hERG ANALYSIS, MOLECULAR DOCKING STUDIES AND DFT ANALYSIS OF 2- SUBSTITUTED 4,5-DIPHENYL-1H-IMIDAZOLE DERIVATIVES." Journal of Advanced Scientific Research 12, no. 04 (2021): 211–29. http://dx.doi.org/10.55218/jasr.202112428.

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In the present investigation, a series of 2-substituted 4,5-Diphenyl-1H-imidazoles (3a-f) were prepared via one pot Debus-Radziszwski multicomponent condensation reaction using molecular iodine as a catalyst. Synthesis involves one pot reaction of benzil and substituted aromatic aldehydes (2a-e) in the presence of ammonium acetate and molecular iodine as catalyst under the solvent free grinding technique. The structures of the compounds were established based on multi nuclear NMR (1H 813C) spectral data and mass spectrometry. These compounds were subjected to in- silico ADMETox evaluation, hER

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Ajpi, Cesario, Naviana Leiva, Max Vargas, Anders Lundblad, Göran Lindbergh, and Saul Cabrera. "Synthesis and Characterization of LiFePO4–PANI Hybrid Material as Cathode for Lithium-Ion Batteries." Materials 13, no. 12 (2020): 2834. http://dx.doi.org/10.3390/ma13122834.

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This work focuses on the synthesis of LiFePO4–PANI hybrid materials and studies their electrochemical properties (capacity, cyclability and rate capability) for use in lithium ion batteries. PANI synthesis and optimization was carried out by chemical oxidation (self-assembly process), using ammonium persulfate (APS) and H3PO4, obtaining a material with a high degree of crystallinity. For the synthesis of the LiFePO4–PANI hybrid, a thermal treatment of LiFePO4 particles was carried out in a furnace with polyaniline (PANI) and lithium acetate (AcOLi)-coated particles, using Ar/H2 atmosphere. The

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Sanford, Robert A., James R. Cole, and James M. Tiedje. "Characterization and Description of Anaeromyxobacter dehalogenans gen. nov., sp. nov., an Aryl-Halorespiring Facultative Anaerobic Myxobacterium." Applied and Environmental Microbiology 68, no. 2 (2002): 893–900. http://dx.doi.org/10.1128/aem.68.2.893-900.2002.

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ABSTRACT Five strains were isolated which form a physiologically and phylogenetically coherent group of chlororespiring microorganisms and represent the first taxon in the Myxobacteria capable of anaerobic growth. The strains were enriched and isolated from various soils and sediments based on their ability to grow using acetate as an electron donor and 2-chlorophenol (2-CPh) as an electron acceptor. They are slender gram-negative rods with a bright red pigmentation that exhibit gliding motility and form spore-like structures. These unique chlororespiring myxobacteria also grow with 2,6-dichlo

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Sun, Yongming, Biqi Xia, Xiangzhun Chen, Chuansong Duanmu, Denghao Li, and Chao Han. "Rapid Quantification of Four Anthocyanins in Red Grape Wine by Hydrophilic Interaction Liquid Chromatography/ Triple Quadrupole Linear Ion Trap Mass Spectrometry." Journal of AOAC INTERNATIONAL 98, no. 6 (2015): 1628–31. http://dx.doi.org/10.5740/jaoacint.15-098.

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Abstract The identification and quantification of four anthocyanins (cyanidin-3-O -glucoside, peonidin- 3-O -glucoside, delphinidin-3-O -glucoside, and malvidin-3-O-glucoside) in red grape wine were carried out by hydrophilic interaction liquid chromatography/triple quadrupole linear ion trap MS (HILIC/QTrap-MS/MS). Samples were diluted directly and separated on a Merck ZIC HILIC column with 20 mM ammonium acetate solution–acetonitrile mobile phase. Quantitative data acquisition was carried out in the multiple reaction monitoring mode. Additional identification and confirmation of target compo

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Silva, Philip J., Tanner Cress, Ryan Drover, et al. "Characterization of Particle Size Distributions and Water-Soluble Ions in Particulate Matter Measured at a Broiler Farm." Agriculture 13, no. 7 (2023): 1284. http://dx.doi.org/10.3390/agriculture13071284.

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The chemical composition and size distribution of particulate matter produced at broiler poultry houses is not well understood, so this is a novel study to understand the particulate size distributions at a poultry house as well as the ionic composition of the particulate matter using real-time methods. Two optical particle counters provided particle size distributions inside and outside the house. An ambient ion monitor and a particle-in-liquid sampler analyzed the ionic chemical composition of the particulate matter in the house while a scanning mobility particle sizer provided size informat

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Rabea, Entsar I., Mohamed E. I. Badawy, and Ahmed F. El-Aswad. "Biochemical Characterization and Kinetics of Carboxylesterase Isolated from Rabbit Liver and Lung in order to Application in the Detoxification of Environmental Pollutants." Current Enzyme Inhibition 13, no. 1 (2017): 56–66. http://dx.doi.org/10.2174/1573408012666160801151753.

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Objective: A carboxylesterase (CbE) or carboxylic-ester hydrolase (EC 3.1.1.1) is an enzyme that catalyzes the hydrolysis of carboxylesters to alcohol and carboxylate. The objective of this study is to obtain this enzyme from liver and lung of rabbit with a comparison between the effects of two specific substrates, α-naphthyl acetate (α-NA) and p-nitrophenyl acetate (p-NPA) on the enzymes activity. The kinetic characteristics of the enzymes have been also investigated in details. Methods: CbE was obtained from rabbit liver and lung with Tris/HCl buffer (pH 7.4) extraction, ammonium sulfate pre

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Chalbot, M. C. G., J. Brown, P. Chitranshi, G. Gamboa da Costa, E. D. Pollock, and I. G. Kavouras. "Functional characterization of the water-soluble organic carbon of size fractionated aerosol in the Southern Mississippi Valley." Atmospheric Chemistry and Physics Discussions 14, no. 3 (2014): 3629–66. http://dx.doi.org/10.5194/acpd-14-3629-2014.

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Abstract. The chemical content of the water soluble organic carbon (WSOC) as a function of particle size was characterized in Little Rock, Arkansas in winter and spring 2013. The objectives of this study were to: (i) compare the functional characteristics of coarse, fine and ultrafine WSOC and (ii) reconcile the sources of WSOC for the period when carbonaceous aerosol was the most abundant particulate component. The WSOC accounted for 5% of particle mass for particles with dp > 0.96 μm and 10% of particle mass for particles with dp < 0.96 μm. Non-exchangeable aliphatic (H-C), unsaturated

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Khan, Mati Ur Rehman, Anwar Abbas Khan, Syeda Aaliya Shehzadi, Rahat Ullah, Khurram Shahzad Munawar, and Muhammad Irfan. "Synthesis and Characterization of Novel Carbazole Based Dyes." Asian Journal of Chemistry 36, no. 12 (2024): 2843–47. https://doi.org/10.14233/ajchem.2024.32673.

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In this work, 9H-carbazole acted as precursor to synthesize a new organic dye, which involved the alkylation of carbazole with butyl bromide in the presence of phase transfer catalyst tetrabutylammonium bromide (TBAB) to give BC (9-butyl-9H-carbazole) followed by the formylation with hexamethylenetetramine (HMTA) in the presence of trifluoroacetic acid (TFA) and tetrahydrofuran (THF). Formyl groups at 3- and 3,6-positions afforded CC (9-butyl-9H-carbazole-3-carbaldehyde) and CD (9-butyl-9H-carbazole-3,6-dicarbaldehye), respectively. The formylation reaction with HMTA suffered with low yield, t

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