Journal articles: 'Ammoniaque'

1

Postma, S. "Le Système Ammoniaque-Eau." Recueil des Travaux Chimiques des Pays-Bas 39, no. 9 (September 3, 2010): 515–36. http://dx.doi.org/10.1002/recl.19200390903.

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Schmitt, C., M. Glaizal, R. Torrents, B. Domangé, L. de Haro, and N. Simon. "Intoxications accidentelles par ammoniaque chez les consommateurs de cocaïne." Toxicologie Analytique et Clinique 33, no. 1 (March 2021): 16–17. http://dx.doi.org/10.1016/j.toxac.2020.10.041.

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TROCCON, J. L., and C. DEMARQUILLY. "La vinasse de mélasse de betterave pour les ruminants." INRAE Productions Animales 2, no. 4 (October 10, 1989): 245–48. http://dx.doi.org/10.20870/productions-animales.1989.2.4.4417.

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Les vinasses de mélasse de betterave sont des sous-produits des industries de fermentation de la mélasse. Leurs compositions chimiques (cendres, matières azotées) et leurs utilisations digestives (matière sèche, matière organique, énergie, azote) par les ruminants sont très variables selon leurs origines et les traitements technologiques appliqués. En moyenne, leurs valeurs énergétiques sont de 0,82 UFL et 0,75 UFV/kg MS. Leurs teneurs élevées en matières azotées totales, essentiellement non protéiques (bétaïne, acide glutamique, ammoniaque), en font une source intéressante pour les bovins et les ovins. L’incorporation de ces produits dans les rations déficitaires en PDIN sera facilitée par une déminéralisation préalable éliminant en particulier le potassium et le soufre.

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4

Chachuat, B., N. Roche, and M. A. Latifi. "Réduction du modèle ASM 1 pour la commande optimale des petites stations d'épuration à boues activées." Revue des sciences de l'eau 16, no. 1 (April 12, 2005): 5–26. http://dx.doi.org/10.7202/705496ar.

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L'adoption par l'Union Européenne de normes de rejets plus contraignantes implique une meilleure gestion des stations d'épuration. L'utilisation de modèles de simulation dynamique dans des schémas de commande en boucle fermée constitue une alternative intéressante pour répondre à ce problème. Sur la base du modèle ASM 1, un modèle réduit est ici élaboré pour le procédé à boues activées en aération séquentielle, en vue de la commande optimale du système d'aération. Les simplifications considérées sont de deux types : (i) les dynamiques lentes du système sont identifiées au moyen d'une méthode d'homotopie, puis éliminées du modèle ; (ii) des simplifications plus heuristiques consistant à prendre en compte un composé organique unique et à éliminer la concentration des composés organiques azotés sont ensuite appliquées. Elles conduisent à un modèle simplifié de 5 variables. L'application d'une procédure d'identification paramétrique permet alors de démontrer que le comportement dynamique du modèle simplifié est en bonne adéquation avec celui du modèle ASM 1 sur un horizon de prédiction de plusieurs heures, même lorsque les concentrations de l'influent ne sont pas connues. Il est également vérifié que le modèle proposé est observable et structurellement identifiable, sous des conditions d'aérobiose et d'anoxie, à partir des mesures en ligne des concentrations en oxygène dissous, ammoniaque et nitrate. Le modèle simplifié développé présente ainsi toutes les propriétés requises pour une future utilisation au sein de schémas de commande en boucle fermée, en vue de la commande optimale des petites stations d'épuration à boues activées.

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Barnard, James L., Gerry M. Stevens, and Patrick J. Leslie. "Design Strategies for Nutrient Removal Plant." Water Science and Technology 17, no. 11-12 (November 1, 1985): 233–42. http://dx.doi.org/10.2166/wst.1985.0235.

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The first full-scale Bardenpho plant in the colder regions of North America was constructed in Kelowna and operated for about two years. The design was based on criteria developed by Barnard (1974) and based on experience of the design of similar plants in South Africa. Maximum flexibility leaving the operator many options for optimization was allowed. Effluent ortho-phosphate, nitrate and ammonia concentration averaged 0.43, 2.05 and 0.78 mg/ℓ respectively over the first year of operation. Operating results are compared with design predictions. Some results are presented and the design was tested using theories developed by Ekama et al (1984) whose models predicted that no phosphate removal would be possible. RESUME La premierè installation de Bardenpho, à grande échelle dans les régions les plus froides de l'Amérique du Nord a été construite à Kelowna et utilisée pendant plus de deux ans. Le dessin était fondé sur les information de Barnard (1974) et basé sur l'expérience du dessin d'installation sembables en Afrique du Sud. L'installation était flexible et laissait à l'opérateur le choix de plusieurs options pour l'optimisation. La concentration de ortho-phosphate, nitrate et ammoniaque avait les valeurs moyennes de 0,43; 2,05 et 0,78 mg/ℓ respectivement pendant la premiére année de travail. Les resultats sont presentés et la dessin a été mis à l'épreuve en utilisant les théories développées par Ekama et al (1984) dont les modèles ont predit. qu' aucun élimination de phosphate serait possible vu le petit réduction de nitrate qui le modèle ont prédit aux températures plus froides.

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Abizadeh, Marzieh, Soomaayeh Heysieattalab, Negin Saeedi, Narges Hosseinmardi, Mahyar Janahmadi, Farhad Salari, Seyed Mehdi Golpayegani, and Asie Shojaii. "Ameliorating Effects of Dorema ammoniacum on PTZ-Induced Seizures and Epileptiform Brain Activity in Rats." Planta Medica 86, no. 18 (August 26, 2020): 1353–62. http://dx.doi.org/10.1055/a-1229-4436.

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AbstractThe objective of the current study was to investigate the anti-epileptogenic and anticonvulsant effects of Dorema ammoniacum gum, which is used in Iranian traditional medicine for the treatment of seizures. Animals received pentylenetetrazol (IP, 30 mg/kg/48 h) for inducing seizures. Five different seizure stages were evaluated for 20 min and parameters including maximum seizure stage, the latency to the onset of stage 4, stage 4 duration, and seizure duration were measured. D. ammoniacum (50 and 100 mg/kg) or its vehicle was administered 30 min before or after pentylenetetrazol injection in different groups. In addition, the effective dose of D. ammoniacum (100 mg/kg) on different seizure stages was compared with the common antiseizure drug phenobarbital. In another set of experiments, we investigated the effective dose of D. ammoniacum on fully kindled animals in which an interictal electroencephalogram was recorded by superficial electrodes placed on the skull. The results showed that D. ammoniacum administration, before and after pentylenetetrazol injections, significantly decreased seizure stage, seizure duration, stage 4 duration, and 1/stage 4 latency. The anti-epileptogenic effect of D. ammoniacum was about 50 to 60% of phenobarbital. In addition, D. ammoniacum significantly decreased seizure stage, seizure duration, stage 4 duration, and 1/stage 4 latency when administered to fully kindled animals but had no effect on the power of EEG sub-bands. These results indicate that D. ammoniacum has anti-epileptogenic and anticonvulsant effects in a chemical kindling model of seizures.

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7

Roozeboom, M. H. W. Bakhuis. "Sur la courbe de solubilité de deux sels produisant aussi bien un sel double que des cristaux mixtes, étudiée spécialement pour les mélanges de sel ammoniaque et de chlorure ferrique." Recueil des Travaux Chimiques des Pays-Bas 12, no. 2 (September 3, 2010): 37–44. http://dx.doi.org/10.1002/recl.18930120205.

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8

RÉRAT, A., C. SIMOES NUNES, P. VAUGELADE, and P. VAISSADE. "Absorption intestinale et métabolisme hépatique chez le porc éveillé soumis à perfusion duodénale d'une solution glucidique contenant un hydrolysat ménagé de protéines laitières ou un mélange d'acides aminés libres de même composition. II. Lactate, pyruvate, urée, ammoniaque." Reproduction Nutrition Développement 26, no. 5B (1986): 1188. http://dx.doi.org/10.1051/rnd:19860813.

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9

Rajani, M., N. Saxena, M. N. Ravishankara, N. Desai, and H. Padh. "Evaluation of the Antimicrobial Activity of Ammoniacum Gum from Dorema ammoniacum." Pharmaceutical Biology 40, no. 7 (January 2002): 534–41. http://dx.doi.org/10.1076/phbi.40.7.534.14686.

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10

Song, Yuanzhou, Feilong Wu, Xiongfei Zheng, Xiaohua Ma, Fang Fang, and Yanhui Guo. "Stepwise combination of NH3 with BH4− in metal borohydride ammoniate." Chemical Communications 51, no. 6 (2015): 1104–7. http://dx.doi.org/10.1039/c4cc08228a.

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11

Huang, Jianmei, Yingbin Tan, Jiahao Su, Qinfen Gu, Radovan Černý, Liuzhang Ouyang, Dalin Sun, Xuebin Yu, and Min Zhu. "Synthesis, structure and dehydrogenation of zirconium borohydride octaammoniate." Chemical Communications 51, no. 14 (2015): 2794–97. http://dx.doi.org/10.1039/c4cc09317h.

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12

Chabane, Habib, Nouara Tahi, and Francisque Leynadier. "Comparaison de l'efficacité d'extraits de latex ammoniaqué et non ammoniaqué pour le diagnostic de l'allergie immédiate aux protéines de latex naturel." Revue Française d'Allergologie et d'Immunologie Clinique 41, no. 1 (January 2001): 132. http://dx.doi.org/10.1016/s0335-7457(01)80080-0.

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13

Raeesdana, Azade, Mohammad Hosein Farzaei, Mohsen Amini, and Roja Rahimi. "CHEMICAL COMPOSITION OF ESSENTIAL OIL AND EVALUATION OF ACUTE AND SUB-ACUTE TOXICITY OF DOREMA AMMONIACUM D. DON. OLEO-GUM-RESIN IN RATS." African Journal of Traditional, Complementary and Alternative medicines 15, no. 1 (December 29, 2017): 26. http://dx.doi.org/10.21010/ajtcam.vi15.1.3.

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Background: Dorema Ammoniacum is a perennial herb which has been used in Persian Traditional Medicine for different indications, including gastrointestinal disorders and sciatica. Despite numerous medicinal uses, there is a lack of toxicological studies on Dorema Ammoniacum; therefore, the aim of the present study is to investigate its possible toxic effects as well as the determining chemical composition of its essential oil. Materials and Methods: Acute toxicity study was performed by administration of single increasing geometric doses of oleo-gum-resin solution (1250, 2500, and 5000 mg/kg) to Wistar rats. For sub-acute toxicity study, repeated doses of oleo-gum-resin solution (100, 200 and 500 mg/kg) were administered orally to rats for 4 weeks. At the end of the treatment, histopathological studies, hematological assessments, and biochemical parameters were performed. Results: GC-MS was performed to determine the chemical composition of the essential oil. Acute toxicity results demonstrated no mortality, and the Median Lethal Dose (LD50) was greater than 5000 mg/kg. Sub-acute treatment did not show any significant changes in biochemical and hematological parameters at any doses compared to the control group. Histopathological analysis of the organs revealed varying effects. At the level of the liver, vacuolar degeneration and mild inflammation at 200 and 500 mg/kg doses were observed. At the level of kidney, congestion of glomeruli and a widening of the urinary space at 500mg/kg were observed compared to the control group. The principle components of the essential oil were Cuperene (14.31%) and β-Funebrene (12.74%). Conclusion: The results suggest that the acute administration of the oleo-gum-resin of D. Ammoniacum is not accompanied with signs of toxicity; however, its administration over the long term might associate with renal toxicity and hepatotoxicity.

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14

Yousefzadi, Morteza, Hossein Mirjalili, Naba Alnajar, Amineh Zeinali, and Mitra Parsa. "Composition and in vitro antimicrobial activity of the essential oil of Dorema ammoniacum D. Don. fruit from Iran." Journal of the Serbian Chemical Society 76, no. 6 (2011): 857–63. http://dx.doi.org/10.2298/jsc100830074y.

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The genus Dorema (Apiaceae) is represented in the flora of Iran with seven species of which two, D. ammoniacum D. Don. and D. aucheri Boiss. are endemic. Ripe fruits of D. ammoniacum collected just in the deciduous time were subjected to hydrodistillation to yield the essential oil, which was subsequently analyzed by GC and GC-MS. Twenty-nine compounds were identified and quantified, representing 95.1 % of the total oil. (Z)-Ocimenone (22.3 %) and (E)-ocimenone (18.1 %) were the main components of the oil. In vitro antimicrobial activity of the oil was evaluated against seven Gram-positive and Gram-negative bacteria (Bacillus subtilis, Enterococcus faecalis, Staphylococcus epidermidis, Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa and Klebsiella pneumoniae) and three fungi (Candida albicans, Saccharomyces cerevisiae and Aspergillus niger). The results of the antimicrobial assay of the oil by the disc diffusion method and the MIC values indicated that the oil exhibited moderate to high antimicrobial activity, especially against B. subtilis and S. epidermidis with MIC value of 3.75 mg ml-1.

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15

Guentner, Christian, and Nikolaus Korber. "The first alkali metal hydroxide-ammoniate, cesium hydroxide-ammoniate (1:1), CsOH·NH3, synthesis and crystal structure." Monatshefte für Chemie - Chemical Monthly 144, no. 6 (March 7, 2013): 747–50. http://dx.doi.org/10.1007/s00706-012-0909-z.

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16

Yang, Junzhi, Paul Beaumont, Terry Humphries, Craig Jensen, and Xingguo Li. "Efficient Synthesis of an Aluminum Amidoborane Ammoniate." Energies 8, no. 9 (August 26, 2015): 9107–16. http://dx.doi.org/10.3390/en8099107.

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17

Bragadin, M., G. Scarponi, G. Capodaglio, P. Cescon, and F. Pucciarelli. "Electrolytic oxidation of selenocyanate in ammoniate solution." Journal of Electroanalytical Chemistry and Interfacial Electrochemistry 186, no. 1-2 (May 1985): 113–25. http://dx.doi.org/10.1016/0368-1874(85)85759-2.

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18

Li, Wen, Guotao Wu, Yongshen Chua, Yuan Ping Feng, and Ping Chen. "Role of NH3 in the Dehydrogenation of Calcium Amidoborane Ammoniate and Magnesium Amidoborane Ammoniate: A First-Principles Study." Inorganic Chemistry 51, no. 1 (December 12, 2011): 76–87. http://dx.doi.org/10.1021/ic200990m.

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Guentner, Christian, and Nikolaus Korber. "ChemInform Abstract: The First Alkali Metal Hydroxide-Ammoniate, Cesium Hydroxide-Ammoniate (1:1), CsOH·NH3, Synthesis and Crystal Structure." ChemInform 44, no. 29 (July 1, 2013): no. http://dx.doi.org/10.1002/chin.201329014.

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20

Adhami, Hamid-Reza. "Compounds from Gum Ammoniacum with Acetylcholinesterase Inhibitory Activity." Scientia Pharmaceutica 81, no. 3 (2013): 793–805. http://dx.doi.org/10.3797/scipharm.1306-16.

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Li, Wen, Guotao Wu, Yongshen Chua, Yuan Ping Feng, and Ping Chen. "ChemInform Abstract: Role of NH3in the Dehydrogenation of Calcium Amidoborane Ammoniate and Magnesium Amidoborane Ammoniate: A First-Principles Study." ChemInform 43, no. 10 (February 9, 2012): no. http://dx.doi.org/10.1002/chin.201210002.

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Kan, Hong Min, Ning Zhang, Xiao Yang Wang, and Hong Sun. "Recent Advances in Hydrogen Storage Materials." Advanced Materials Research 512-515 (May 2012): 1438–41. http://dx.doi.org/10.4028/www.scientific.net/amr.512-515.1438.

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An overview of recent advances in hydrogen storage is presented in this review. The main focus is on metal hydrides, liquid-phase hydrogen storage material, alkaline earth metal NC/polymer composites and lithium borohydride ammoniate. Boron-nitrogen-based liquid-phase hydrogen storage material is a liquid under ambient conditions, air- and moisture-stable, recyclable and releases H2controllably and cleanly. It is not a solid material. It is easy storage and transport. The development of a liquid-phase hydrogen storage material has the potential to take advantage of the existing liquid-based distribution infrastructure. An air-stable composite material that consists of metallic Mg nanocrystals (NCs) in a gas-barrier polymer matrix that enables both the storage of a high density of hydrogen and rapid kinetics (loading in <30 min at 200°C). Moreover, nanostructuring of Mg provides rapid storage kinetics without using expensive heavy-metal catalysts. The Co-catalyzed lithium borohydride ammoniate, Li(NH3)4/3BH4 releases 17.8 wt% of hydrogen in the temperature range of 135 to 250 °C in a closed vessel. This is the maximum amount of dehydrogenation in all reports. These will reduce economy cost of the global transition from fossil fuels to hydrogen energy.

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23

Younes, Y., X. F. Garcia, and J. Gagneur. "Étude de l'impact des activités touristiques sur la qualité de l'eau et l'organisation des peuplements macrobenthiques au sein des cours d'eau de la Principauté d'Andorre." Revue des sciences de l'eau 15, no. 1 (April 12, 2005): 421–24. http://dx.doi.org/10.7202/705463ar.

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Le développement considérable de l'activité touristique hivernale et estivale entraîne des perturbations au niveau des principaux cours d'eau andorrans. Il est intéressant d'étudier l'impact de ces perturbations sur des réseaux hydrographiques de haute altitude caractérisés par des conditions du milieu particulières (basse température-forte pente). Les données disponibles concernant la physicochimie et la faune des eaux andorranes sont réduites (PUIG, 1979 ; PEÑA, 1983). Treize stations ont été étudiées dans le cadre de ces travaux. Au cours d'un cycle annuel (automne 1998 à automne 1999), huit prélèvements d'invertébrés benthiques ont été réalisés à chaque station à l'aide d'un filet Surber (vide de maille : 200 µm-surface échantillonnée : 1/ 20e m2). Neuf paramètres physicochimiques (température, pH, conductivité, DCO, DBO5, nitrates, nitrites, ammoniaque, phosphates) ont été mesurés de façon hebdomadaire à chaque station. Le traitement des données physicochimiques par analyses discriminantes révèle l'existence d'un gradient amont-aval de dégradation de la qualité de l'eau. Parallèlement, la qualité de l'eau suit un cycle saisonnier mis en évidence par l'opposition entre campagnes d'été et d'hiver-printemps 1999, d'une part, et campagnes d'automne 1998-1999, d'autre part. L'analyse de la répartition spatiotemporelle de la faune benthique, basée également sur des analyses discriminantes, met en évidence la disparition des taxons polluosensibles dans les stations intermédiaires et aval comme les filtreurs (Simuliidae), les prédateurs (Perlodae, Perlididae, Rhyacophilidae) et les fragmenteurs (Nemouridae, Leuctridae) et l'apparition de nouveaux taxons polluotolérants en aval (Chironomidae, Oligochètes). Ce genre de phénomène a déjà été observé dans d'autres cours d'eau de montagne soumis à des perturbations entraînant l'augmentation de la charge organique (DECAMPS et PUJOL, 1977). Ces taxons polluotolérants comme par exemple, les Oligochètes qui prolifèrent dans la zone aval du cours d'eau principal (Gran Valira) et en aval de l'unique station d'épuration située sur l'Ariège remplacent dans la structure trophique d'autres taxons polluosensibles. Ce phénomène s'observe également au sein d'un même groupe trophique, c'est le cas des prédateurs composés des Perlidae, des Perlodidae et des Rhyacophilidae présents dans les stations de haute altitude et qui disparaissent en aval où ils sont remplacés par les Achètes (Glossiphoniidae). Le calcul de plusieurs indices biologiques d'évaluation de la qualité des eaux (IBGN - BMWP), de richesse et de diversité spécifiques (indices de Shannon et de Margalef), de structure des peuplements (CUMMINS, 1979, 1985) met en évidence la diminution de la richesse et de la diversité spécifiques des stations amont vers les stations aval. L'impact du développement touristique se manifeste à partir des stations de moyenne altitude. Dans ces stations, la pollution est partiellement évacuée, chaque automne, par l'eau de bonne qualité en provenance des zones amont des cours d'eau. Ce phénomène se traduit par une grande variabilité des conditions physicochimiques et de la composition des communautés benthiques. Dans les stations aval, la pollution prend plutôt un caractère chronique suite à la concentration des pollutions en provenance des différentes zones perturbées. La variabilité des conditions du milieu et des assemblages faunistiques est donc moindre. Les résultats obtenus à partir du traitement des données physicochimiques et faunistiques mettent en évidence une dégradation de l'intégrité écologique des cours d'eau (modifications physicochimiques, modifications du peuplement, diminution de la diversité). L'impact des perturbations d'origine anthropique suit un cycle dépendant de la fréquentation touristique. Au cours de ce cycle, alternent deux périodes " critiques " caractérisées par des perturbations hivernales (ski) et estivales (tourisme, randonnées) et une période de " récupération " durant l'automne. Ces travaux ont permis de tester l'hypothèse des perturbations intermédiaires du milieu (CONNELL, 1978 ; RESH, 1988 ; TOWNSEND et al., 1997) et de rechercher les seuils d'intensité des perturbations et/ou l'amplitude de ces perturbations ainsi que leur impact négatif sur la composition faunistique (EDWARD et RYKIEL, 1985 ; PICKETT et al., 1989 ; REICE et al., 1990).

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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 (October 1, 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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Zheng, Xueli, Guotao Wu, Wen Li, Zhitao Xiong, Teng He, Jianping Guo, Hua Chen, and Ping Chen. "Releasing 17.8 wt% H2 from lithium borohydride ammoniate." Energy & Environmental Science 4, no. 9 (2011): 3593. http://dx.doi.org/10.1039/c1ee01480c.

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Appendino, Giovanni, Gian Mario Nano, Davide Viterbo, Giovanni De Munno, Marco Cisero, Giovanni Palmisano, and Manuela Aragno. "Ammodoremin, an Epimeric Mixture of Prenylated Chromandiones from Ammoniacum." Helvetica Chimica Acta 74, no. 3 (May 2, 1991): 495–500. http://dx.doi.org/10.1002/hlca.19910740305.

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27

Gholami, Barat, and Mahdi Faravani. "The possibility of crop cultivation and utilization of edible gum from herb (Dorema ammoniacum D. Don) in dryland farming." Journal of Agricultural Sciences, Belgrade 60, no. 3 (2015): 369–80. http://dx.doi.org/10.2298/jas1503369g.

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Gum ammoniacum (Dorema ammoniacum D. Don) is one of the most important food, industrial and medicinal plants of Iran which is mainly distributed in semi-arid and desert areas. It is endangered due to superfluous and unsustainable harvesting methods. The objective of this study was to evaluate the possibility of crop cultivation in terms of dryland farming and the best operation method for collecting gum resin. For this purpose, the effects of different scarification methods (traditional, concave and staircase) and cut-off frequencies (5, 10 and 13 times) on gum yield of the five-year-old plants were studied at Toroq farm in Mashhad. The treatments were studied under a split plot structure in time experiment which was arranged in a completely randomized design with three replications. The rate of the root gum production and the rate of plant survival in the years after the withdrawal were measured, and finally the data were analyzed. Results showed no significant differences among cutting methods at p<0.05. The yield of gum was affected by times of harvesting and the highest yield was observed (p<0.01) in 13 cut-off times with 31.67 g/plant. The lowest gum yields were seen in 5 cut-off times with 5.84 g/plant. The traditional cutting method destroyed crown buds and caused the death of the plant (p<0.01). Reasonable gum yields and plant regeneration rates were obtained with the use of stairs method which is an easy method to be applied by the farmers or beneficiaries.

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Bentrup, Ursula. "Über die thermische Zersetzung von N2H6[CrF5(H2O)] und die neue Verbindung N2H6CrF5 / On the Thermal Decomposition of N2H6[CrF5(H2O)] and the New Compound N2H6CrF5." Zeitschrift für Naturforschung B 47, no. 7 (July 1, 1992): 957–61. http://dx.doi.org/10.1515/znb-1992-0711.

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Thermal decomposition of N2H6[CrF5(H2O)] has been investigated by thermoanalytical, X-ray and IR spectroscopic methods. Under quasi-isobaric conditions the decomposition takes place in several steps. The intermediate N2H6CrF5 has been found which crystallizes monoclinically with α = 555.0 pm, b = 1084.6 pm, c = 777.0 pm, β = 91.76°. N2H6CrF5 decomposes via an amorphous intermediate to give pure rhomboedrical CrF3 as the final product. One of the intermediate has been identified as chromium fluoride ammoniate CrF3 0.4 NH3. No hydrolysis reactions have been observed.

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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 (October 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 all be resolved during the refinement.

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30

Chua, Yong Shen, Guotao Wu, Zhitao Xiong, Teng He, and Ping Chen. "Calcium Amidoborane Ammoniate—Synthesis, Structure, and Hydrogen Storage Properties." Chemistry of Materials 21, no. 20 (October 27, 2009): 4899–904. http://dx.doi.org/10.1021/cm9020222.

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Yang, Yanjing, Yongfeng Liu, You Li, Xin Zhang, Mingxia Gao, and Hongge Pan. "Towards the endothermic dehydrogenation of nanoconfined magnesium borohydride ammoniate." Journal of Materials Chemistry A 3, no. 20 (2015): 11057–65. http://dx.doi.org/10.1039/c5ta00697j.

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Wang, Meichun, Liuzhang Ouyang, Meiqin Zeng, Jiangwen Liu, Chenghong Peng, Huaiyu Shao, and Min Zhu. "Magnesium borohydride hydrolysis with kinetics controlled by ammoniate formation." International Journal of Hydrogen Energy 44, no. 14 (March 2019): 7392–401. http://dx.doi.org/10.1016/j.ijhydene.2019.01.209.

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Ould-Amara, Salem, Dominique Granier, Rodica Chiriac, François Toche, Pascal Yot, and Umit Demirci. "Lithium Hydrazinidoborane Ammoniate LiN2H3BH3·0.25NH3, a Derivative of Hydrazine Borane." Materials 10, no. 7 (July 5, 2017): 750. http://dx.doi.org/10.3390/ma10070750.

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Adhami, H. R., H. Kaehlig, M. Zehl, and L. Krenn. "NEW SPIRO-SESQUITERPENOIDIC CHROMANDIONE FROM GUM AMMONIACUM WITH ACETYLCHOLINESTERASE INHIBITORY ACTIVITY." Reviews on Clinical Pharmacology and Drug Therapy 10, no. 2 (June 15, 2012): 32. http://dx.doi.org/10.17816/rcf10232.

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APPENDINO, G., G. M. NANO, D. VITERBO, G. DE MUNNO, M. CISERO, G. PALMISANO, and M. ARAGNO. "ChemInform Abstract: Ammodoremin, an Epimeric Mixture of Prenylated Chromandiones from Ammoniacum." ChemInform 22, no. 29 (August 23, 2010): no. http://dx.doi.org/10.1002/chin.199129283.

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Nazir, Nausheen, Mohammad Nisar, Muhammad Zahoor, Faheem Uddin, Saeed Ullah, Riaz Ullah, Siddique Akber Ansari, Hafiz Majid Mahmood, Ahmed Bari, and Abdulrehman Alobaid. "Phytochemical Analysis, In Vitro Anticholinesterase, Antioxidant Activity and In Vivo Nootropic Effect of Ferula ammoniacum (Dorema ammoniacum) D. Don. in Scopolamine-Induced Memory Impairment in Mice." Brain Sciences 11, no. 2 (February 19, 2021): 259. http://dx.doi.org/10.3390/brainsci11020259.

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Background: Ferula ammoniacum (D. Don) is one of the endemic medicinal plants that is traditionally used to treat a number of diseases. Although the plant has been used to enhance memory, the investigational evidence supporting the nootropic effect was unsubstantial. Hence, the rationale for this study was to assess the potential beneficial effect of F. ammoniacum seed extracts on learning and memory in mice. Methods: The powdered plant samples (aerial parts) were subjected to extraction ad fractionation. Among the extracts, crude and ethyl acetate extracts were screened for major phytochemicals through HPLC analysis. All the extracts were evaluated for the in vitro anticholinesterase (AChE and BChE) and antioxidant potentials. Among the extracts the active fraction was further assessed for improving learning and memory in mice using behavioural tests like Y-maze and novel object recognition test (NORT) using standard protocols. After behavioural tests, all the animals were sacrificed and brains tissues were assessed for the ex vivo anticholinesterase and antioxidant potentials. Results: Phytochemicals like chlorogenic acid, quercetin, mandelic acid, phloroglucinol, hydroxy benzoic acid, malic acid, epigallocatechin gallate, ellagic acid, rutin, and pyrogallol were identified in crude methanolic extract (Fa.Met) and ethyl acetate fraction (Fa.EtAc) through HPLC. Fa.EtAc and Fa.Chf extracts more potently inhibited AChE and BChE with IC50 values of 40 and 43 µg/mL, and 41 and 42 µg/mL, respectively. Similarly highest free radical scavenging potential was exhibited by Fa.EtAc fraction against DPPH (IC50 = 100 µg/mL) and ABTS (IC50 = 120 µg/mL). The extract doses, 100 and 200 mg/kg body weight significantly (p < 0.01) improved the short-term memory by increasing the percent spontaneous alternation in the Y-maze test along with increasing discrimination index in the NORT that clearly indicated the enhancement in the recognition memory of mice. Conclusion: The extracts more potently scavenged the tested free radicals, exhibited anticholinesterase activities, improved the learning abilities and reduced the memory impairment induced by scopolamine in mice model thus suggesting that these extracts could be effectively used for the management of oxidative stress, neurodegenerative diseases and memory loss.

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Song, Xing Fu, Jin Wang, Xiang Tian Wang, and Jian Guo Yu. "Preparation of Anhydrous Magnesium Chloride from MgCl₂·6H₂O Ⅱ Thermal Decomposition Mechanism of the Intermediate Product." Materials Science Forum 488-489 (July 2005): 61–64. http://dx.doi.org/10.4028/www.scientific.net/msf.488-489.61.

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Magnesium chloride hex-ammoniate (MgCl2·6NH3) is an intermediate to produce anhydrous magnesium chloride (MgCl2) by method of reaction crystallization. MgCl2·6NH3 is decomposed at 670K to produce anhydrous magnesium chloride. The process of thermal decomposition and its non-isothermal kinetics of MgCl2·6NH3 is studied. Results show that the thermal decomposition process is made up of three stages, the thermal decomposition functions and the thermal decomposition kinetics parameters, such as activation energy (E), pro-exponential factor (A) of MgCl2·6NH3 for each step are obtained by means of the Acher differential, the Coats-Redfern integral and multi-accelerated heating rate method. This study provides a valuable theoretical basis for MgCl2·6NH3 decomposition process on industrialization.

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Klein, Wilhelm, and Martin Jansen. "Darstellung und Kristallstruktur von Strontiumozonid-Ammoniakat, Sr(O3)2 · 9 NH3 / Synthesis and Crystal Structure of Strontium Ozonide Ammoniate, Sr(O3)2 · 9 NH3." Zeitschrift für Naturforschung B 60, no. 4 (April 1, 2005): 426–30. http://dx.doi.org/10.1515/znb-2005-0413.

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Strontium ozonide has been synthesised, starting from caesium ozonide, via cation exchange in liquid ammonia. From these solutions, if kept at −78 °C for 14 days, an ammoniate, Sr(O3)2 · 9 NH3, crystallises. The coarse, ruby red crystals decompose above the boiling temperature of ammonia and are extremely sensitive to moisture. According to a single crystal structure determination (P4/nmm; a = 7.597(1), c = 13.496(2) Å , Z = 2; R1 = 7.50%; 254 independent reflections) Sr(O3)2 · 9 NH3 consists of ozonide anions and strontium cations. The complex cations form an approximately cubic close packing, where the octahedral and half of the tetrahedral interstices are occupied by ozonide anions. The anions are orientationally disordered

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Klein, Wilhelm, and Martin Jansen. "Darstellung und Kristallstruktur von Lithiumozonid-Ammoniakat (1/5) LiO3 · 5 NH3/Synthesis and Crystal Structure of Lithiumozonide-Ammonia (1/5) LiO3 · 5 NH3." Zeitschrift für Naturforschung B 54, no. 11 (November 1, 1999): 1345–49. http://dx.doi.org/10.1515/znb-1999-1101.

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Lithium ozonide has been synthezised starting from cesium ozonide via cation exchange in liquid ammonia and crystallizes at -78°C as an ammoniate, LiO3 · 5NH3. The coarse, ruby red crystals decompose above the boiling temperature of ammonia and are extremely sensitive to moisture. The crystal structure of L iO3 · 5NH3 (P c21n; a = 1231.9(5), b = 637.4(2), c = 1104.8(4) pm; Z = 4; R1 = 4.57%; 1318 independent reflections) consists of lithium tetramine complexes, ozonide anions and non coordinating ammonia molecules. With respect to the arrangement of the complex cations and of the anions there is similarity to the WC type of structure. The central oxygen atom of the ozonide anion is disordered.

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Didbaridze, I. "Synthesis Tetrathioarsenate as a Precipitant of Ammoniate Ions of Transitional Metals." Earth Sciences 4, no. 5 (2015): 88. http://dx.doi.org/10.11648/j.earth.s.2015040501.26.

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Chua, Yong Shen, Wen Li, Wendy J. Shaw, Guotao Wu, Tom Autrey, Zhitao Xiong, Ming Wah Wong, and Ping Chen. "Mechanistic Investigation on the Formation and Dehydrogenation of Calcium Amidoborane Ammoniate." ChemSusChem 5, no. 5 (January 31, 2012): 927–31. http://dx.doi.org/10.1002/cssc.201100523.

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Millan, Angel, Rafael Rodriguez-Clemente, Sabino Veintemillas, and Bernard Spinner. "Decomposition and synthesis of NiCl2 ammoniate salts An optical microscopy study." Journal of the Chemical Society, Faraday Transactions 93, no. 18 (1997): 3363–69. http://dx.doi.org/10.1039/a700058h.

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Joseph, Stefanie, Christof Suchentrunk, and Nikolaus Korber. "Dissolving Silicides: Syntheses and Crystal Structures of New Ammoniates Containing Si52– and Si94– Polyanions and the Role of Ammonia of Crystallisation." Zeitschrift für Naturforschung B 65, no. 9 (September 1, 2010): 1059–65. http://dx.doi.org/10.1515/znb-2010-0901.

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The dissolution of the ternary material K6Rb6Si17 in liquid ammonia yields the solvate compound Rb4Si9 ・ 5NH3, which contains fourfold negatively charged nine atom silicon clusters Si94−. Using additionally the [2.2.2] cryptand during the dissolution results in the solvate [K(2.2.2- crypt)]2Si5 ・ 4NH3 , in which the Si52− anion is present in the crystal structure. The Si52− anion has the shape of a nearly ideal trigonal bipyramid. The starting material K6Rb6Si17 contains both Si44− and Si94− Zintl anions. In ammoniate crystal structures, Si94− anions are accessible independently of Si44− anions, and ammonia of crystallisation plays a major role in the observed crystal symmetry. For the cryptate structures of Si52− and Ge52− anions ammonia of crystallisation is obligatory despite the loss of crystal symmetry compared to the crystal structures of the heavier homologues Pb52− and Sn52−.

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Irvani, N., M. Solouki, M. Omidi, A. R. Zare, and S. Shahnazi. "Callus induction and plant regeneration in Dorem ammoniacum D., an endangered medicinal plant." Plant Cell, Tissue and Organ Culture (PCTOC) 100, no. 3 (December 11, 2009): 293–99. http://dx.doi.org/10.1007/s11240-009-9650-7.

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Dietzel, Pascal D. C., and Martin Jansen. "Dimeric Sandwich-like Ion Pairs in the Crystal Structure of Tetrabutylammonium Ozonide Ammoniate." Zeitschrift für anorganische und allgemeine Chemie 632, no. 14 (October 2006): 2276–80. http://dx.doi.org/10.1002/zaac.200600156.

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Zakharov, E. N., and Yu D. Gamburg. "Some Regularities of Deposition of an Iron-Tungsten Alloy from Citrate-Ammoniate Solutions." Russian Journal of Electrochemistry 41, no. 8 (August 2005): 892–95. http://dx.doi.org/10.1007/s11175-005-0151-7.

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Tranchant, A., R. Messina, and B. Fahys. "Use of LiClO4 ‐ 3.5 NH 3 Ammoniate as Electrolyte in Lithium/Intercalation Compound Batteries." Journal of The Electrochemical Society 137, no. 3 (March 1, 1990): 804–8. http://dx.doi.org/10.1149/1.2086559.

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Motevalian, Manijeh, Saeed Mehrzadi, Samira Ahadi, and Asie Shojaii. "Anticonvulsant activity of Dorema ammoniacum gum: evidence for the involvement of benzodiazepines and opioid receptors." Research in Pharmaceutical Sciences 12, no. 1 (2017): 53. http://dx.doi.org/10.4103/1735-5362.199047.

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Ebrahimi, Behzad, Aziz Homayouni Rad, Babak Ghanbarzadeh, Mohammadali Torbati, and Pasquale M. Falcone. "The emulsifying and foaming properties of Amuniacum gum ( Dorema ammoniacum ) in comparison with gum Arabic." Food Science & Nutrition 8, no. 7 (June 4, 2020): 3716–30. http://dx.doi.org/10.1002/fsn3.1658.

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Reil, Markus, and Nikolaus Korber. "A S8-like [Sb8]8− Zintl Anion in the Ammoniate [K17(Sb8)2(NH2)] · 17.5NH3." Zeitschrift für anorganische und allgemeine Chemie 633, no. 10 (August 2007): 1599–602. http://dx.doi.org/10.1002/zaac.200700272.

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Journal articles on the topic 'Ammoniaque'

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