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Journal articles on the topic 'Ammonia compound'

Author: Grafiati

Published: 25 May 2024

Last updated: 31 July 2025

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1

Black, DS, N. Chaichit, BM Gatehouse, and GI Moss. "Unusual Formation of New Indole-Containing Heterocyclic Ring Systems." Australian Journal of Chemistry 40, no. 12 (1987): 1965. http://dx.doi.org/10.1071/ch9871965.

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The oxazinoindoletrione (3) underwent reaction with aqueous ammonia in methanol or ethanol to yield the polycyclic methyl or ethyl esters (4) and (5) respectively. Reaction of trione (3) with gaseous ammonia in dry ethanol gave the aminobenzodiazepinone (7). This compound lost ammonia on heating in toluene to give compound (11) and in the presence of methanol or ethanol gave the methyl or ethyl esters (9) and (10) respectively. The structures of compounds (4), (7) and (10) were all established by X-ray crystallography.

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2

Suchentrunk, Christof, and Nikolaus Korber. "Reduktion von Isochinolin und Indol mit Cäsium in flüssigem Ammoniak / Reduction of Isoquinoline and Indole with Cesium in Liquid Ammonia." Zeitschrift für Naturforschung B 58, no. 10 (2003): 990–96. http://dx.doi.org/10.1515/znb-2003-1009.

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Isoquinoline and indole were reduced with solutions of cesium in liquid ammonia and the resulting crystalline compounds isolated as ammonia-rich solvate crystals. The reduction of isoquinoline yields the anion bisisoquinoline-2,2’-diide in the compound Cs2C18H14N2 · (7/2) NH3 as the result of a coupling reaction. Indole is reduced to the 5,8-dihydroindolide anion in the ammoniate CsC8H8N · 3NH3. Both anions display interactions between their aromatic π-systems and the cesium cations.

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3

Xin, L., and NF Curtis. "Compounds of (1,4,8,11-Tetraazacyclotetra-Decane)Copper(II) With 6-Carbamoyl and 13-Carbamoyl, -Methylcarbamoyl, -Ethylcarbamoyl and -Hydrazinocarbonyl Substituents." Australian Journal of Chemistry 45, no. 6 (1992): 1087. http://dx.doi.org/10.1071/ch9921087.

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The (dimethyl trans-1,4,8,1l-tetraazacyclotetradecane-6,13-dicarboxylate)copper(II) cation reacts with ammonia, methylamine or hydrazine to give the dicarbamoyl-, di(methylcarbamoyl)- or di(hydrazinocarbonyl)-substituted complex cations, respectively. The 6,6,13,13-tetra(methoxy- carbonyl)-substituted compound reacts with ammonia at O�C to form the tetracarbamoyl- substituted macrocycle compound [which can also be prepared by condensation of bis(ethane-1,2-diamine)copper(II), formaldehyde and malondiamide], and the dicarbamoyl dicarboxylic acid compound at higher temperatures. Reaction of the

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4

Yasuda, Tomoko, Miyoko Waki, Yasuyuki Fukumoto, Hiroaki Saito, and Hiroki Yokojima. "Odorous Compound Removal Performance and Water Properties of a Biotrickling Filter Installed in a Piggery." Applied Engineering in Agriculture 37, no. 4 (2021): 563–72. http://dx.doi.org/10.13031/aea.14443.

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Highlights We evaluated the performance of a two-stage biotrickling filter in a pig facility. A short empty bed residence time lowered the secondary filter removal efficiency for many odorous compounds. The removal efficiency of some compounds increased when the pH in the secondary water tank decreased. Low-odor-threshold compounds such as MT, n-BA, n-PA, and p-cresol were indicated as targets for optimization. Abstract . Odor is a major problem in pig production, and it is important to minimize odor emissions. To determine the factors influencing variations in odor removal efficiency, we anal

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5

Undalkar, Rushikesh. "Ammonia Removal from Wastewater of Different Sources and Recent Development in Ammonia Stripping." International Journal for Research in Applied Science and Engineering Technology 10, no. 10 (2022): 673–77. http://dx.doi.org/10.22214/ijraset.2022.45946.

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Abstract: Industrial wastewater contains organic impurities such as nitrogen compounds and many more. There is a limit to each compound in wastewater before discharging it into the ecosystem. It is maximum 2000-4000 g N/m3. It also depends upon different countries' environmental conservation laws. As nitrogen is harmful for aquatic life in low concentrations as well, it is needed to be treated before discharging and also before reuse in other applications. the removal of ammonia can be accomplished by steam stripping as well as by air stripping i.e. absorption and desorption. the conventional

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6

Béres, Kende Attila, István E. Sajó, György Lendvay, et al. "Solid-Phase “Self-Hydrolysis” of [Zn(NH3)4MoO4@2H2O] Involving Enclathrated Water—An Easy Route to a Layered Basic Ammonium Zinc Molybdate Coordination Polymer." Molecules 26, no. 13 (2021): 4022. http://dx.doi.org/10.3390/molecules26134022.

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An aerial humidity-induced solid-phase hydrolytic transformation of the [Zn(NH3)4]MoO4@2H2O (compound 1@2H2O) with the formation of [(NH4)xH(1−x)Zn(OH)(MoO4)]n (x = 0.92–0.94) coordination polymer (formally NH4Zn(OH)MoO4, compound 2) is described. Based on the isostructural relationship, the powder XRD indicates that the crystal lattice of compound 1@2H2O contains a hydrogen-bonded network of tetraamminezinc (2+) and molybdate (2−) ions, and there are cavities (O4N4(μ-H12) cube) occupied by the two water molecules, which stabilize the crystal structure. Several observations indicate that the w

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7

Shi, Jianchao, Lianxiang Wang, Yongrui Yang, and Tinglin Huang. "Effects of Seasonal Thermal Stratification on Ammonia Nitrogen Transformation in a Source Water Reservoir." Processes 9, no. 12 (2021): 2218. http://dx.doi.org/10.3390/pr9122218.

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Seasonal thermal stratification has a significant impact on water quality. In this paper, the variation of vertical distribution of ammonia nitrogen in a source water reservoir was studied, on the base of field monitoring data. The dominant factor of the variation in ammonia nitrogen is the anaerobic environment caused by the seasonal thermal stratification, which leads to the degradation of nitrogen-containing organic compounds in the sediments. To determine the rates of ammonia accumulation, an in situ experimental chamber was used. The results showed that, before the formation of thermal st

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8

Tran, Thanh Trung, Nathan J. Bott, Rebecca van Gelderen, Nam Trung Nguyen, Phuong Minh Thi Chu, and Ha Hoang Chu. "Comparative Genome Analysis of Two Heterotrophic Nitrifying Pseudomonas putida Strains Isolated from Freshwater Shrimp Ponds in Soc Trang Province." Fermentation 8, no. 7 (2022): 336. http://dx.doi.org/10.3390/fermentation8070336.

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Nitrogen compounds, especially ammonia, are widely produced in aquaculture systems during cultivation. Ammonia has been investigated as a model compound for use by heterotrophic nitrifying bacteria. Pseudomonas TT321 and Pseudomonas TT322, isolated from shrimp pond water in Soc Trang province, Vietnam, are identified by comparing them with 31 of the closest genomes sequences from the NCBI nucleotide database. The genome sizes of strains TT321 and TT322 were 5,566,241 bp and 5,563,644 bp, respectively. No plasmids were evident in these strains. Genome analysis revealed that TT321 and TT322 belo

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9

Racha, Hanumandlu, Balakishan Vadla, Kavitha Peddolla, and Sailu Betala. "Synthesis and Anticancer Activity of Novel Hetero Ring Fused Pyridine Amide Derivatives." Asian Journal of Chemistry 31, no. 11 (2019): 2485–91. http://dx.doi.org/10.14233/ajchem.2019.22150.

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A series of novel hetero ring fused pyridine amide derivatives were prepared starting from ethyl furo[2,3-b]pyridine-2-carboxylate (3) on reaction with ammonia to afford furo[2,3-b]pyridine-2-carboxamide (4), compound 4 on reaction with trifluoroacetic acid to give compound 5, which on reaction with bromoethyl acetate followed by hydrazine hydrate to give compound 7. Compound 7 when reacted with different substituted aromatic aldehydes to give Schiff base compounds (8a-l). Similarly, compound 6a when reacted with diverse substituted aliphatic amines to give amide derivatives (9a-h). All the sy

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10

Fattah, Tanzeela A., Aamer Saeed, Zaman Ashraf, et al. "4-Aminocoumarin based Aroylthioureas as Potential Jack Bean Urease Inhibitors; Synthesis, Enzyme Inhibitory Kinetics and Docking Studies." Medicinal Chemistry 16, no. 2 (2020): 229–43. http://dx.doi.org/10.2174/1573406415666190715164834.

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Background: Urease enzyme catalyzes the hydrolysis of urea into ammonia and CO2, excess ammonia causes global warming and crop reduction. Ureases are also responsible for certain human diseases such as stomach cancer, peptic ulceration, pyelonephritis, and kidney stones. New urease inhibitors are developed to get rid of such problems. Objective: This article describes the synthesis of a series of novel 1-aroyl-3-(2-oxo-2H-chromen-4- yl)thiourea derivatives (5a-j) as Jack bean urease inhibitors. Methods: Freshly prepared aryl isothiocyanates were reacted with 4-aminocoumarin in the same pot in

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11

Mazure, N., and N. Truffaut. "Degradation of morpholine by Mycobacterium aurum MO1." Canadian Journal of Microbiology 40, no. 9 (1994): 761–65. http://dx.doi.org/10.1139/m94-120.

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When Mycobacterium aurum MO1 was grown with morpholine, the release of ammonia into the supernatant was proportional to the disappearance of morpholine, showing that this compound was mineralized. MO1 was able to grow in high concentrations of morpholine but accumulation of ammonia inhibited growth and degradation of morpholine. Immobilization of bacterial cells in carrageenan gel beads showed that morpholine degradation in these conditions began earlier and was faster than in free culture. One of the two branches of the lower pathway of morpholine biodegradation was induced while the other br

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12

Gärtner, Stefanie, Christof Suchentrunk, and Nikolaus Korber. "Coordination preferences of the alkali cations sodium and caesium in the mixed-cationic Zintl ammoniate Cs3.2Na0.8Ge9·5.3NH3." Acta Crystallographica Section C Structural Chemistry 70, no. 11 (2014): 1036–39. http://dx.doi.org/10.1107/s2053229614021998.

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The involvement of two different alkali cations in the nonagermanide ammoniate Cs3.2Na0.8Ge9·5.3NH3[tricaesium sodium nonagermanide–ammonia (1/5.3)] provides insights into the coordination behaviour of ammonia towards sodium and caesium cations within one compound and represents the first mixed-cationic solvate structure of nonagermanide tetraanions. The compound crystallizes in the monoclinic space groupP21/mand, with the presence of pseudomerohedral twinning, mixed-cation sites and disordering of the nonagermanide cage anions, features a combination of crystallographic challenges which could

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13

Liu, Yue, Hong Ni, Gang Li, and Dafeng Zhi. "Research on NH₃-SCR reductant technology progress for diesel vehicles." E3S Web of Conferences 360 (2022): 01030. http://dx.doi.org/10.1051/e3sconf/202236001030.

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This paper describes the technical principle, research status and application status of four reducing agents (aqueous urea solution, solid ammonium salt, solid ammonia compound and liquid ammonia) which supply NH3 for SCR of diesel vehicles, introduces the replacement methods of solid ammonia, and analyzes the application feasibility of liquid ammonia. A comprehensive comparative study of the four reducing agents is carried out in terms of storage and validity requirements, low temperature performance, ammonia storage capacity, replacement mode, replacement frequency, safety, cost and future a

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14

Yamaguchi, Haruhiko, and Kyoko Yoshino. "Influence of Tannin-Copper Complexes as Preservatives for Wood on Mechanism of Decomposition by Brown-Rot Fungus Fomitopsis palustris." Holzforschung 55, no. 5 (2001): 464–70. http://dx.doi.org/10.1515/hf.2001.077.

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SummaryThe mechanism of preservation by chemically modified tannin and tannin-ammonia-copper agents was examined. Wood decay byF. palustriswas markedly suppressed by processing wood with agents made by mixing chemically modified tannins with ammonia and cupric chloride. When wood powder was treated with these agents, mycelial growth and generated protein increased to some extent. The preservative effects of the chemically modified tannins (RMT and CMT) or compound agents composed of the tannins and ammonia-copper were considered to be due to inhibition of the activities of xylanase, mannase an

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15

Grassl, Tobias, and Nikolaus Korber. "Tetraammineplatinum(II) dichloride ammonia tetrasolvate." Acta Crystallographica Section E Structure Reports Online 70, no. 7 (2014): i31. http://dx.doi.org/10.1107/s1600536814012343.

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The title compound, [Pt(NH3)4]Cl2·4NH3, was crystallized in liquid ammonia from the salt PtCl2. The platinum cation is coordinated by four ammonia molecules, forming a square-planar complex. The chloride anions are surrounded by nine ammonia molecules, either bound within the platinum complex or solvent molecules. The solvent ammonia molecules are packed in such a way that an extended network of N—H...N and N—H...Cl hydrogen bonds is formed. The structure is isotypic with [Pd(NH3)4]Cl2·4NH3[Grassl & Korber (2014).Acta Cryst.E70, i32].

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Aksenchik, Konstantin V. "EVOLUTION AND PROSPECTS OF ENERGY AND RESOURCE SAVING APPROACHES IN AMMONIA TECHNOLOGY." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENII KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 64, no. 1 (2020): 4–21. http://dx.doi.org/10.6060/ivkkt.20216401.6310.

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Nitrogen is one of the nutrients required for plant nutrition. The problem of fixing atmospheric nitrogen continues to be relevant at the present time. If at the beginning of the 20th century the problem was solved in the direction of ammonia synthesis, today the search trend has shifted to energy and resource saving. The presence of a strong triple chemical bond in the nitrogen molecule determines the high energy intensity of industrial production of bound nitrogen compounds. This review article is examined the evolution of ammonia technology, as the most common compound of fixed nitrogen, fr

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Aksenchik, Konstantin V. "EVOLUTION AND PROSPECTS OF ENERGY AND RESOURCE SAVING APPROACHES IN AMMONIA TECHNOLOGY." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENII KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 64, no. 1 (2020): 4–21. http://dx.doi.org/10.6060/ivkkt.20216401.6310.

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Nitrogen is one of the nutrients required for plant nutrition. The problem of fixing atmospheric nitrogen continues to be relevant at the present time. If at the beginning of the 20th century the problem was solved in the direction of ammonia synthesis, today the search trend has shifted to energy and resource saving. The presence of a strong triple chemical bond in the nitrogen molecule determines the high energy intensity of industrial production of bound nitrogen compounds. This review article is examined the evolution of ammonia technology, as the most common compound of fixed nitrogen, fr

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18

Kondratev, V. M., A. Kuznetsov, S. V. Fedina, S. S. Nalimova, V. A. Moshnikov, and A. D. Bolshakov. "Gallium phosphide nanowires for “biological concentrations” ammonia detection." Journal of Physics: Conference Series 2172, no. 1 (2022): 012006. http://dx.doi.org/10.1088/1742-6596/2172/1/012006.

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Abstract Ammonia is widespread chemical compound found both in nature and in human body, and its detection is very important in biology and medicine as well as in environmental monitoring systems. This work is aimed at fabrication and study of precise, technological and relatively cheap ammonia sensors compatible with a liquid medium. Here we use GaP epitaxial nanowires (NWs) as adsorption elements capable of ammonia detection fabricated via a simple protocol. The device properties are studied in terms of change in sensor impedance spectrum upon presence of ammonia. Physical interpretation of

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19

Grassl, Tobias, and Nikolaus Korber. "Tetraamminepalladium(II) dichloride ammonia tetrasolvate." Acta Crystallographica Section E Structure Reports Online 70, no. 7 (2014): i32. http://dx.doi.org/10.1107/s1600536814012355.

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The title compound, [Pd(NH3)4]Cl2·4NH3, was crystallized in liquid ammonia from the salt Pd(en)Cl2(en is ethylenediamine) and is isotypic with [Pt(NH3)4]Cl2·4NH3[Grassl & Korber (2014).Acta Cryst.E70, i31]. The Pd2+cation is coordinated by four ammonia molecules, exhibiting a square-planar geometry. The chloride anions are surrounded by nine ammonia molecules. These are either bound in the palladium complex or solvent molecules. The packing of the ammonia solvent molecules enables the formation of an extended network of N—H...N and N—H...Cl interactions with nearly ideal hydrogen-bonding g

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20

Gao, Long Long, Yan Zhen Yu, Miao Wan Li, Yu Xing Zhou, and Hua Dong Zhang. "Adsorption Performance of Ammonia onto Compound Clinoptilolite Filter Material." Applied Mechanics and Materials 295-298 (February 2013): 443–46. http://dx.doi.org/10.4028/www.scientific.net/amm.295-298.443.

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In order to combine the microbial metabolism characteristics in biological aerated filter (BAF) with the adsorption and ion-exchange ability of natural clinoptilolite to treat sanitary wastewater, the experiment use clinoptilolite powder as main materials to prepare the large specific surface and high porosity spherical compound filter material by adding adhesive and pore-forming agent etc and get better effect on sanitary wastewater treatment.The static adsorption test showed that the adsorb ratios of ammonia-nitrogen is 58.5% when the compound filter material dosage was 100g/L, NH3-N concent

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21

Knettel, Doris, Markus Reil, and Nikolaus Korber. "Darstellung und Strukturaufklärung von Tricäsiumundecaphosphid- Ammoniakat(1/3) Cs3P11 · 3 NH3 / Synthesis and Crystal Structure of Tricesium Undecaphosphide-Ammonia(l/3) Cs3P11 · 3 NH3." Zeitschrift für Naturforschung B 56, no. 10 (2001): 965–69. http://dx.doi.org/10.1515/znb-2001-1001.

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Cs3 P11 · 3 NH3 was obtained from a solution of Cs3P11 in liquid ammonia. Its structure consists of P113--cage anions, which coordinate the cesium cations together with ammonia molecules, resulting in a three-dimensional network. The compound completes a family of structures that are derived from the binary phosphide Cs3P11, through the stepwise expanding and dismantling of the three-dimensional network of ions by ammonia molecules of coordination or through the exchange of the cesium cations for voluminous molecular cations.

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22

Bader, Ammar, Majdi M. Bkhaitan, Ashraf N. Abdalla, et al. "Design and Synthesis of 4-O-Podophyllotoxin Sulfamate Derivatives as Potential Cytotoxic Agents." Evidence-Based Complementary and Alternative Medicine 2021 (January 25, 2021): 1–7. http://dx.doi.org/10.1155/2021/6672807.

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4-O-Podophyllotoxin sulfamate derivatives were prepared using the natural lignan podophyllotoxin. The prepared compounds were afforded by reacting O-sulfonyl chloride podophyllotoxin with ammonia or aminoaryl/heteroaryl motif. Biological evaluation was performed in human breast cancer (MCF7), ovarian cancer (A2780), colon adenocarcinoma (HT29), and normal lung fibroblast (MRC5) cell lines. Compound 3 exhibited potent inhibitory activity and good selectivity margin. Compounds 2, 3, and 7 exerted apoptotic effect in MCF7 cells in a dose-dependent manner. The cytotoxicity of the verified compound

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23

Kowalchuk, George A., Zinaida S. Naoumenko, Piet J. L. Derikx, Andreas Felske, John R. Stephen та Irina A. Arkhipchenko. "Molecular Analysis of Ammonia-Oxidizing Bacteria of the β Subdivision of the Class Proteobacteria in Compost and Composted Materials". Applied and Environmental Microbiology 65, № 2 (1999): 396–403. http://dx.doi.org/10.1128/aem.65.2.396-403.1999.

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ABSTRACT Although the practice of composting animal wastes for use as biofertilizers has increased in recent years, little is known about the microorganisms responsible for the nitrogen transformations which occur in compost and during the composting process. Ammonia is the principle available nitrogenous compound in composting material, and the conversion of this compound to nitrite in the environment by chemolithotrophic ammonia-oxidizing bacteria is an essential step in nitrogen cycling. Therefore, the distribution of ammonia-oxidizing members of the β subdivision of the class Proteobacteri

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24

Rizki, Nuzulul Anggi, Mohammad Masykuri, and Retno Rosariastuti. "Application of Microbial Fuel Cell (MFC) for Bioremediation of Ammonia." Journal of Biomimetics, Biomaterials and Biomedical Engineering 62 (October 24, 2023): 63–69. http://dx.doi.org/10.4028/p-2jima9.

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Ammonia is a poisonous compound that can harm fish. Fish feed and manure are the primary sources of ammonia in catfish farming ponds. High concentrations of ammonia can cause death. Therefore, it is necessary to control the presence of ammonia to minimize the potential for fish mortality. Microbial Fuel Cell (MFC) is a technology that can help with ammonia bioremediation. This study aims to analyze the effectiveness of Microbial Fuel Cell (MFC) in reducing ammonia. The research method used is an experimental research method with qualitative descriptive analysis. The research was conducted on a

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Suzuki, Norimichi, Hiroko Nakaoka, Akifumi Eguchi, et al. "Concentrations of Formic Acid, Acetic Acid, and Ammonia in Newly Constructed Houses." International Journal of Environmental Research and Public Health 17, no. 6 (2020): 1940. http://dx.doi.org/10.3390/ijerph17061940.

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Herein, the concentrations of formic acid, acetic acid, and ammonia in samples of indoor air for 47 new houses were measured two weeks after completion. The houses were fabricated with light-gauge steel structures. The measurements were performed in living rooms and bedrooms without furniture and outdoors. Air samples were analyzed using ion chromatography. The mean values were 28 (living room), 30 (bedroom), and 20 μg m−3 (outdoor air) for formic acid; 166 (living room), 151 (bedroom), and 51 μg m−3 (outdoor air) for acetic acid; and 73 (living room), 76 (bedroom), and 21 μg m−3 (outdoor air)

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Namdeo, Pratibha, Arpan Bhardwaj, and S. K. Verma. "SYNTHESIS OF MIXED LIGAND METAL COMPLEX OF CU (II) WITH SCHIFF BASE AND THIOACETAMIDE." International Journal of Engineering Technologies and Management Research 4, no. 12 (2020): 24–26. http://dx.doi.org/10.29121/ijetmr.v4.i12.2017.587.

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Complex compounds were identified in the 19th century. The formation of hexammine cobalt(III) chloride [CO (NH3)6] Cl3 which is prepared from cobalt chloride and ammonia is thefirst compound, studied and real beginning of coordination Chemistry [1]. Alfred Werner firstexplained the nature of bonding and structure of these complexes and he was awarded NoblePrize in 1913 [2]. He gave the concept of primary (ionisable) valency and secondary(unionsible) valencies of metal ion.

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Šetka, Milena, Jana Drbohlavová, and Jaromír Hubálek. "Nanostructured Polypyrrole-Based Ammonia and Volatile Organic Compound Sensors." Sensors 17, no. 3 (2017): 562. http://dx.doi.org/10.3390/s17030562.

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Fokin, V. N., Yu M. Shul’ga, B. P. Tarasov, et al. "Reaction of the Intermetallic Compound SmFe11Ti with Gaseous Ammonia." Russian Journal of General Chemistry 75, no. 6 (2005): 831–34. http://dx.doi.org/10.1007/s11176-005-0328-5.

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Béres, Kende Attila, Fanni Szilágyi, Zoltán Homonnay, et al. "Structural, Spectroscopic, and Thermal Decomposition Features of [Carbonatotetraamminecobalt(III)] Iodide—Insight into the Simultaneous Solid-Phase Quasi-Intramolecular Redox Reactions." Inorganics 11, no. 2 (2023): 68. http://dx.doi.org/10.3390/inorganics11020068.

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[κ2-O,O′-Carbonatotetraamminecobalt(III)] iodide, or [Co(NH3)4CO3]I, named in this paper as compound 1, was prepared and characterized comprehensively with spectroscopic (IR, Raman and UV) and single-crystal X-ray diffraction methods. Compound 1 was orthorhombic, and isomorphous with the analogous bromide. The four ammonia ligands and the carbonate anion were coordinated to the central cobalt cation in a distorted octahedral geometry. The carbonate ion formed a four-membered symmetric planar chelate ring. The complex cations were bound to each other by N-H···O hydrogen bonds and formed zigzag

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Ovsyannikov, Dmitry, and Vadim Lashchenov. "Comparison of Complex Formation Mechanisms in Hydrogen Abstraction Reaction between the Nitro Compound and Ammonia." Proceedings 9, no. 1 (2018): 27. http://dx.doi.org/10.3390/ecsoc-22-05771.

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The present work aims to compare two possible pathways of a pre-reaction complex in the reaction of transfer of a hydrogen atom from ammonia to a nitro compound forming. Nitrobenzene, nitromethane, and HNO2 were used as nitro compounds. The proposed paths are: nitro compound intersystem crossing with a subsequent search for a substrate, or the formation of a complex with its subsequent excitation. The calculations were performed using TDPBE0/TDA/aug-cc-pVDZ method in NWChem-6.8 program. For verification purposes, some additional calculations were performed using RASCI/aug-cc-pVDZ method in PSI

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Chernyak, V., V. Iukhymenko, K. Iukhymenko, et al. "Plasma Activated Synthesis of Macromolecular Compound." PLASMA PHYSICS AND TECHNOLOGY 7, no. 1 (2020): 6–9. http://dx.doi.org/10.14311/ppt.2020.1.6.

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The paper is devoted to study of the plasma-activated synthesis of organic compounds with optically activity. Synthesis was carried out in plasma-liquid system with a rotating gliding discharge submerged in a liquid. The initial reagents of synthesis were ethanol, ammonia, and CO<sub>2</sub>. The possibility of the inﬂuence of the electric ﬁeld direction on the optical activity of the products of plasma-activated synthesis is shown.

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32

Ray, Hannah, Francois Perreault, and Treavor H. Boyer. "Ammonia recovery and fouling mitigation of hydrolyzed human urine treated by nanofiltration and reverse osmosis." Environmental Science: Water Research & Technology 8, no. 2 (2022): 429–42. http://dx.doi.org/10.1039/d1ew00601k.

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Colodrero, Rosario, Inés Salcedo, Montse Bazaga-García, et al. "High-Throughput Synthesis of Pillared-Layered Magnesium Tetraphosphonate Coordination Polymers: Framework Interconversions and Proton Conductivity Studies." Inorganics 6, no. 3 (2018): 96. http://dx.doi.org/10.3390/inorganics6030096.

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Novel pillared-layered framework materials were synthesized by high-throughput or microwave-assisted methodology that contain Mg2+ and the zwitterionic linker HDTMP (hexamethylenediamine-N,N,N′,N′-tetrakis(methylenephosphonic acid)). Three compounds were structurally characterized by X-ray powder diffraction. In the compound {Mg[(HO3PCH2)2N(CH2)6N(CH2PO3H2)2]·(H2O)}n(1), obtained at 140 °C by hydrothermal or microwave-assisted reaction, the layers are built by isolated Mg2+ octahedra coordinated by oxygen atoms from six different zwitterionic HDTMP ligands. Each amino-bis(methylenephosphonate)

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James, W. J., L. Jagat, Q. Cai, W. B. Yelon, and J. B. Yang. "Structural Study on Ammonia Borane for Hydrogen Storage." Materials Science Forum 610-613 (January 2009): 425–30. http://dx.doi.org/10.4028/www.scientific.net/msf.610-613.425.

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Ammonia borane(BH3NH3) is a promising hydrogen storage material because of its high gravimetric (19.6 wt% H2) and volumetric hydrogen density with an accompanying moderate decomposition temperature. Previously reported structures determined by using x-ray and neutron diffraction on hydrides show differences in bond lengths and atomic coordination. Here, the crystal structures of fully and half deuterated ammonia borane were investigated as a function of temperature using powder neutron diffraction. The neutron diffraction patterns show a significant difference due to large difference in the sc

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Estevez, Rafael, Francisco J. López-Tenllado, Laura Aguado-Deblas, Felipa M. Bautista, Antonio A. Romero, and Diego Luna. "Current Research on Green Ammonia (NH3) as a Potential Vector Energy for Power Storage and Engine Fuels: A Review." Energies 16, no. 14 (2023): 5451. http://dx.doi.org/10.3390/en16145451.

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Considering the renewable electricity production using sustainable technologies, such as solar photovoltaics or wind turbines, it is essential to have systems that allow for storing the energy produced during the periods of lower consumption as well as the energy transportation through the distribution network. Despite hydrogen being considered a good candidate, it presents several problems related to its extremely low density, which requires the use of very high pressures to store it. In addition, its energy density in volumetric terms is still clearly lower than that of most liquid fuels. Th

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Gao, Peifeng. "Progress of ammonia electro-oxidation catalysts for direct ammonia alkaline fuel cells." Highlights in Science, Engineering and Technology 43 (April 14, 2023): 340–49. http://dx.doi.org/10.54097/hset.v43i.7439.

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At present, hydrogen fuel cells are one of the effective means to solve energy and environmental problems, but the problem of hydrogen storage and transportation is difficult to break through. Ammonia is a carbon-free hydrogen-rich compound, which also has the advantages of high bulk density and easy storage and transportation, and is an ideal fuel to replace hydrogen as a battery. However, at present, the preferred ammonia electro-oxidation catalyst for direct ammonia alkaline fuel cells is still platinum, and its expensive price is the main problem that hinders the wide application of direct

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Mostafa, Nagwan G., Ahmed G. Radwan, and Mona M. Galal. "Two-Dimensional Steady-State Analysis of Selected Wastewater State Variables Using ASM3." International Journal of Engineering Research in Africa 54 (June 2021): 176–86. http://dx.doi.org/10.4028/www.scientific.net/jera.54.176.

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Performance of activated sludge wastewater treatment plants are mainly dependent on bacterial growth, which is limited by many factors. These factors include availability of suitable substrate, limiting nutrients, environmental conditions, and energy. In activated sludge model no. 3 (ASM3), constituents in wastewater are divided into two main categories: carbonaceous compounds and nitrogenous compounds, which are further subdivided depending on their solubility and biodegradability. These compounds are not mutually independent; hence, the fate of one compound in the biological processes is aff

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Ramazonova, Dilbar, Zokirjon Turayev, Bakhodir Mamurov, et al. "Study of a Copper Microelement Compound Formed in Ammophosis Pulp." E3S Web of Conferences 411 (2023): 01046. http://dx.doi.org/10.1051/e3sconf/202341101046.

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The results of physicochemical analyzes of the compound CuNH4 PO4 ∙ H2O isolated from ammophos pulp at pH 6.58 obtained by neutralization of phosphoric acid containing copper sulfate as a trace element with gaseous ammonia are presented. The compound was found to have the formula [Cu (NH3) (H2O) HPO4]. The parameters of the N–H bond for the coordinated amino group were calculated: force constant, bond angle, and interatomic distance. In the transition from the electronic spectrum of the reflection of copper hydrophosphate monohydrate to the spectrum of copper ammonium phosphate monohydrate, a

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Fan, Li Sha, Yan Zhen Yu, and Chun Hui Zhao. "Preparation of Compound Clinoptilolite Filter Material and Performance of Ammonia Nitrogen Removal." Advanced Materials Research 830 (October 2013): 24–27. http://dx.doi.org/10.4028/www.scientific.net/amr.830.24.

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This experiment use natural clinoptilolite powder as main materials to prepare the large specific surface and high porosity spherical compound filter material by adding adhesive and pore-forming agent etc.This compound filter material has favourable effect when treating sanitary wastewater. The static adsorption test showed that the absorption ratio of ammonia-nitrogen is 58.5% when the compound filter material dosage was 100g/L, NH4+-N concentration was 100mg/L and the contact time was 40min.The cure fitting of the adsorption isotherm of NH4+-N on the compound filter material could be well de

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Żółciak, Tadeusz, and Zbigniew Łataś. "Ammonia dilution during nitriding and carbonitridingin a fluidized bed of 41CrAlMo7 constructional steel." Inżynieria Powierzchni 24, no. 3 (2019): 34–41. http://dx.doi.org/10.5604/01.3001.0013.5787.

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Nitriding of 41CrAlMo7 steel was carried out in a fluidized bed of aluminum oxide at a constant temperature of 570oC/4h in ammonia with technical nitrogen or with nitrogen-hydrogen mixture. Carbonitriding was carried out in ammonia with technical nitrogen for two different carbon carriers. In addition, one process was carried out in ammonia with the addition of 5% propane. The influence of diluting ammonia with pure and technical nitrogen upon the hardness and thickness of the nitrided layer was investigated. The hardness and thickness of the carbonitrided layer in ammonia with technical nitro

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Ploszajski, Anna R., Matthew Billing, Neal T. Skipper, and Jeremy K. Cockcroft. "A novel ammonium pentaborate – poly(ethylene-glycol) templated polymer-inclusion compound." Chemical Communications 55, no. 57 (2019): 8290–92. http://dx.doi.org/10.1039/c9cc02720c.

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Reaction of ammonia borane with poly-ethylene glycol at slightly elevated temperatures leads to the formation of the first known example of a borate-based polymer inclusion compound with a pentaborate framework structure.

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Hendriksen, Peter Vang, Xiufu Sun, Francesco Mondi, Patricia Rabelo Monich, Stéven Pirou, and Henrik Lund Frandsen. "Electrochemical Cells for Novel Routes to Ammonia." ECS Transactions 111, no. 6 (2023): 1611–21. http://dx.doi.org/10.1149/11106.1611ecst.

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Ammonia is an extremely important chemical compound. The conventional production route is CO2 intensive and almost 2% of global anthropogenic CO2 emissions stems from ammonia synthesis. This will have to change over the coming decades to reduce negative impact on the climate and ensure a green route to ammonia. Here, a novel way to provide the synthesis gas mixture for ammonia synthesis is suggested based on combining an SOEC to provide the hydrogen with a dedicated cell to provide also nitrogen for the process. This is suggested to be achieved by electrochemically pumping out oxygen from an a

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Erfkamp, Jan, Margarita Guenther, and Gerald Gerlach. "Piezoresistive Hydrogel-Based Sensors for the Detection of Ammonia." Sensors 19, no. 4 (2019): 971. http://dx.doi.org/10.3390/s19040971.

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Ammonia is an essential key compound in the chemical industry. However, excessively high ammonia concentrations can be harmful to the environment. Sensors for the detection of ammonia are therefore particularly important for environmental analysis. In this article, a novel hydrogel-based piezoresistive ammonia sensor is presented. In aqueous solution, ammonia reacts as a base. This alkaline pH change can be detected with stimuli-sensitive hydrogels. For such an application, highly sensitive hydrogels in the alkaline range with sufficient mechanical stability for the sensor application has to b

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Baki, Touhami. "Pool Boiling of Ammonia, Assessment of Correlations." International Journal of Air-Conditioning and Refrigeration 29, no. 02 (2021): 2150012. http://dx.doi.org/10.1142/s2010132521500127.

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Ammonia is a natural compound, used more and more in refrigeration installations of absorption and vapor compression, component sizing and more particularly evaporators pass by the mastery and prediction of heat transfer. Our study aims to retrieve experimental data from the literature and verify them with known author correlations, and the differences were observed with margins of error; a new correlation has been developed giving convincing results.

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Pratibha, Namdeo, Bhardwaj Arpan, and Verma S.K. "SYNTHESIS OF MIXED LIGAND METAL COMPLEX OF CU (II) WITH SCHIFF BASE AND THIOACETAMIDE." International Journal of Engineering Technologies and Management Research 4, no. 12 SE (2017): 24–26. https://doi.org/10.5281/zenodo.1157957.

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<strong><em>Complex compounds were identified in the 19th century. The formation of hexammine cobalt (III) chloride [CO (NH3)6] Cl3 which is prepared from cobalt chloride and ammonia is the first compound, studied and real beginning of coordination Chemistry </em>[1]<em>. Alfred Werner first explained the nature of bonding and structure of these complexes and he was awarded Noble Prize in 1913 </em>[2]<em>. He gave the concept of primary (ionisable) valency and secondary (unionsible) valencies of metal ion</em>.</strong>

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Li, Shan Ping, Wei Yang, and Jing Fu. "Preparation and Application of Slag Compound Flocculant." Advanced Materials Research 148-149 (October 2010): 1523–27. http://dx.doi.org/10.4028/www.scientific.net/amr.148-149.1523.

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A new kind of composite flocculant, polyaluminum ferric chloride (PAFC), was prepared using blast furnace dust and scrap material of aluminum. Tests about its application on the treatment of brewing wastewater were carried out and the flocculation mechanism was discussed. Results showed that the best condition for foluccation was: doses of PAFC was 40 mg/L, pH of wastewater was about 7.0, sedimentation time was 30 min, removal rate of turbidity, CODcr, decolorization and ammonia were 96.8%、64.7%、87.5% and 41.0% respectively.

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Fortunato, Tatiana Candeia da Silva, José Antonio Tosta dos Reis, Antonio Sérgio Mendonça, and Fernando Das Graças Braga da Silva. "Behavior simulation of nitrogen compounds in rivers with uncertainty analysis." Ambiente e Agua - An Interdisciplinary Journal of Applied Science 15, no. 3 (2020): 1. http://dx.doi.org/10.4136/ambi-agua.2449.

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This study simulated nitrogen-compound concentration changes in rivers, taking into account uncertainty analysis carried out by the Monte Carlo Method. The study area is the final stretch of the Piracicaba River, located in Minas Gerais, Brazil, which is an important Doce River tributary. The uncertainty analysis took into account random generation of hydrodynamic variables, initial water quality conditions and kinetic constants. Different variation percentages for the organic nitrogen decay kinetic constants random generation did not influence considerably the ammonia or organic nitrogen maxi

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Paromov, Artyom E. "Condensation of Benzyl Carbamate with Glyoxal in Polar Protic and Aprotic Solvents." Molecules 28, no. 22 (2023): 7648. http://dx.doi.org/10.3390/molecules28227648.

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The synthesis of substituted 2,4,6,8,10,12-hexaazaisowurtzitane via direct condensation is challenging. The selection of starting ammonia derivatives is very limited. The important step in developing alternative synthetic routes to these compounds is to investigate their formation process in detail. Here, we examined an acid-catalyzed condensation between benzyl carbamate and glyoxal in a ratio of 2:1 in a range of polar protic and aprotic solvents, and discovered a new process occurring during the cascade condensation of glyoxal with ammonia derivatives as well as discovered several processes

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Hasni, Hasni, Syamsuddin Yani, Andi Aladin, and Mimin Septiani. "KESETIMBANGAN PROSES DESORPSI AMONIA DARI ARANG AKTIF HASIL PIROLISIS LIMBAH BIOMASSA." AL ULUM JURNAL SAINS DAN TEKNOLOGI 5, no. 2 (2020): 48. http://dx.doi.org/10.31602/ajst.v5i2.2803.

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Ammonia which is bound to the adsorbent can interfere adsorption process, so that release the compound can be done by desorption process. This research intends to know appropriate equilibrium models to determine maximum capacity of active carbon for desorption ammonia. The method which used in desorption process are Langmuir and Freundlich isotherm models. The research was performed with variation of active carbon mass and variation of contact time. The concentration of ammonia on the desorption process was determined using spectrophotometer at λ 420 nm. The experiment result showed that the m

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Zhao, Jian-Shen, Ajay Singh, Xiao-Dong Huang, and Owen P. Ward. "Biotransformation of Hydroxylaminobenzene and Aminophenol by Pseudomonas putida 2NP8 Cells Grown in the Presence of 3-Nitrophenol." Applied and Environmental Microbiology 66, no. 6 (2000): 2336–42. http://dx.doi.org/10.1128/aem.66.6.2336-2342.2000.

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ABSTRACT Biotransformation products of hydroxylaminobenzene and aminophenol produced by 3-nitrophenol-grown cells of Pseudomonas putida2NP8, a strain grown on 2- and 3-nitrophenol, were characterized. Ammonia, 2-aminophenol, 4-aminophenol, 4-benzoquinone,N-acetyl-4-aminophenol, N-acetyl-2-aminophenol, 2-aminophenoxazine-3-one, 4-hydroquinone, and catechol were produced from hydroxylaminobenzene. Ammonia, N-acetyl-2-aminophenol, and 2-aminophenoxazine-3-one were produced from 2-aminophenol. All of these metabolites were also found in the nitrobenzene transformation medium, and this demonstrated

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