Relevant bibliographies by topics / Phosphine – Analysis

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Phosphine – Analysis'

Author: Grafiati
Published: 4 June 2021
Last updated: 10 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Phosphine – Analysis.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Phosphine – Analysis"

1

Yan, Hui, Hang Chen, Zhengdong Li, et al. "Phosphine Analysis in Postmortem Specimens Following Inhalation of Phosphine: Fatal Aluminum Phosphide Poisoning in Children." Journal of Analytical Toxicology 42, no. 5 (2018): 330–36. http://dx.doi.org/10.1093/jat/bky005.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Koo, Hyun-Na, Seung Ju Seok, Hyun Kyung Kim, Gil-Hah Kim, and Jeong Oh Yang. "Comparative Proteomics Analysis of Phosphine-Resistant and Phosphine-Susceptible Sitophilus oryzae (Coleoptera: Curculionidae)." Applied Sciences 11, no. 9 (2021): 4163. http://dx.doi.org/10.3390/app11094163.

Full text
Abstract:
A proteomic method combining two-dimensional polyacrylamide gel electrophoresis (2D-PAGE) and matrix-assisted laser desorption/ionization-time-of-flight/time-of-flight mass spectrometry (MALDI-TOF/TOF) was used to compare the protein expression profiles of phosphine-resistant (PH3-R) and -susceptible (PH3-S) strains of Sitophilus oryzae. Thirty-nine differentially expressed protein spots were identified between the PH3-R and PH3-S strains; 20 protein spots were upregulated, and 19 protein spots were downregulated in the PH3-R strain compared with their expression in the PH3-S strain. In particular, cytochrome oxidase subunit I showed 15-fold higher expression in the PH3-R strain than in the PH3-S strain. Additionally, citrate synthase 2, delta-1-pyrolline-5-carboxylate dehydrogenase, and triose-phosphate isomerase were highly expressed in the PH3-R strain. In summary, our study has improved understanding of the molecular mechanisms of phosphine resistance in the rice weevil.
APA, Harvard, Vancouver, ISO, and other styles
3

Tajti, Szatmári, Perdih, Keglevich, and Bálint. "Microwave-Assisted Kabachnik–Fields Reaction with Amino Alcohols as the Amine Component." Molecules 24, no. 8 (2019): 1640. http://dx.doi.org/10.3390/molecules24081640.

Full text
Abstract:
In this paper, the microwave (MW)-assisted catalyst-free and mostly solvent-free Kabachnik–Fields reaction of amino alcohols, paraformaldehyde, and various >P(O)H reagents (dialkyl phosphites, ethyl phenyl-H-phosphinate, and secondary phosphine oxides) is reported. The synthesis of N-2-hydroxyethyl-αaminophosphonate derivatives was optimized in respect of the temperature, the reaction time, and the molar ratio of the starting materials. A few by-products were also identified. N,NBis(phosphinoylmethyl)amines containing a hydroxyethyl group were also prepared by the double Kabachnik–Fields reaction of ethanolamine with an excess of paraformaldehyde and secondary phosphine oxides. The crystal structure of a 2-hydroxyethyl-α-aminophosphine oxide and a bis(phosphinoylmethyl)ethanolamine was studied by X-ray analysis.
APA, Harvard, Vancouver, ISO, and other styles
4

Elsayed, Sherif, Mark E. Casada, Ronaldo G. Maghirang, and Mingjun Wei. "Evolution of Phosphine from Aluminum Phosphide Pellets." Transactions of the ASABE 64, no. 2 (2021): 615–24. http://dx.doi.org/10.13031/trans.14326.

Full text
Abstract:
HighlightsThis study developed a mathematical relationship accounting for the production rate of phosphine.The effect of temperature on phosphine sorption into wheat is described mathematically.A computational fluid dynamics (CFD) model was built to predict the phosphine concentration in fumigated grain.Experiments were conducted to validate the CFD model.Abstract. Phosphine gas (PH3) is widely used as a fumigant for stored product insect infestations due to its relatively low price and the near absence of residual chemical on the grain. Understanding the behavior of phosphine gas inside the fumigated space is crucial to maintaining a lethal dosage and protecting stored grain from subsequent insect damage. Phosphine is available either in gas form or is produced from a solid material, as pellets or tablets, that reacts with water in the air. The solid form is the most commonly used; however, limited information is available on the rate of phosphine gas generated from the solid material. In this study, a mathematical equation was formulated, based on previous studies in the literature, to describe the gas generation rate. This equation was incorporated into a computational model using ANSYS Fluent 19.1, a commercial software for computational fluid dynamics (CFD) analysis. The computational model developed here allows prediction of the phosphine concentration within a fumigated grain bulk. The PH3 sorption was included in the model. The effect of temperature on the sorption rate was investigated based on published data, and the rate change due to temperature was characterized. The gas generated by a single pellet was measured in laboratory experiments in a 0.208 m3 sealed barrel. The measurements confirmed the CFD results with an error of 0.3%, 0.9%, and 7.2% for three different configurations. The deviations seen between the experimental replicates increased the error and show the need for further investigation of the effects of temperature, grain age and history, leakage, and other factors. Keywords: CFD, Evolution rate, Phosphine, Sorption.
APA, Harvard, Vancouver, ISO, and other styles
5

Drago, Russell S. ".DELTA.E-.DELTA.C Analysis of Phosphine Basicity." Organometallics 14, no. 7 (1995): 3408–17. http://dx.doi.org/10.1021/om00007a047.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Malysheva, S. F., N. A. Belogorlova, Ya A. Vereshchagina, A. Z. Alimova, E. A. Ishmaeva, and D. V. Chachkov. "Synthesis and conformational analysis of phosphine selenides." Russian Journal of General Chemistry 86, no. 3 (2016): 590–601. http://dx.doi.org/10.1134/s1070363216030154.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Matsumura, Mio, Mizuki Yamada, Atsuya Muranaka, et al. "Synthesis and photophysical properties of novel benzophospholo[3,2-b]indole derivatives." Beilstein Journal of Organic Chemistry 13 (October 30, 2017): 2304–9. http://dx.doi.org/10.3762/bjoc.13.226.

Full text
Abstract:
The parent benzophospholo[3,2-b]indole was prepared by the reaction of dichlorophenylphosphine with a dilithium intermediate, which was prepared in two steps from 2-ethynyl-N,N-dimethylaniline. Using the obtained benzophosphole-fused indole as a common starting material, simple modifications were carried out at the phosphorus center of the phosphole, synthesizing various functionalized analogs. The X-ray structure analysis of trivalent phosphole and phosphine oxide showed that the fused tetracyclic moieties are planar. The benzophosphole-fused indoles, such as phosphine oxide, phospholium salt, and borane complex, exhibited strong photoluminescence in dichloromethane (Φ = 67–75%).
APA, Harvard, Vancouver, ISO, and other styles
8

Milovanović, Milan R., Jelena M. Andrić, Vesna B. Medaković, Jean-Pierre Djukic, and Snežana D. Zarić. "Investigation of interactions in Lewis pairs between phosphines and boranes by analyzing crystal structures from the Cambridge Structural Database." Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials 74, no. 3 (2018): 255–63. http://dx.doi.org/10.1107/s2052520618003736.

Full text
Abstract:
The interactions between phosphines and boranes in crystal structures have been investigated by analyzing data from the Cambridge Structural Database (CSD). The interactions between phosphines and boranes were classified into three types; two types depend on groups on the boron atom, whereas the third one involves frustrated Lewis pairs (FLPs). The data enabled geometric parameters in structures to be compared with phosphine–borane FLPs with classical Lewis pairs. Most of the crystal structures (78.1%) contain BH3as the borane group. In these systems, the boron–phosphorus distance is shorter than systems where the boron atom is surrounded by groups other than hydrogen atoms. The analysis of the CSD data has shown that FLPs have a tendency for the longest boron–phosphorus distance among all phosphine–borane pairs, as well as different other geometrical parameters. The results show that most of the frustrated phosphine–borane pairs found in crystal structures are bridged ones. The minority of non-bridged FLP structures contain, beside phosphorus and boron atoms, other heteroatoms (O, N, S for instance).
APA, Harvard, Vancouver, ISO, and other styles
9

Vereshchagina, Yana A., Eleonora A. Ishmaeva, Denis V. Chachkov, Nina K. Gusarova, Svetlana F. Malysheva, and Alsu Z. Alimova. "Polarity and Conformational Analysis of Secondary Phosphine Selenides." Phosphorus, Sulfur, and Silicon and the Related Elements 188, no. 1-3 (2013): 95–99. http://dx.doi.org/10.1080/10426507.2012.743132.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Banks, H. J. "A continuous, cumulative procedure for analysis of phosphine." Journal of Stored Products Research 23, no. 4 (1987): 213–21. http://dx.doi.org/10.1016/0022-474x(87)90005-1.

Full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Phosphine – Analysis"

1

Durst, Gregory L. "Conformational analysis of phosphine ligands, using molecular mechanics and cone angle calculations." Virtual Press, 1988. http://liblink.bsu.edu/uhtbin/catkey/539633.

Full text
Abstract:
An empirical approach to the study of phosphine compounds was completed using Molecular Mechanics 2 (MM2), and several computer programs written to descibe and analyze the final geometric orientations of the molecules. The calculations were performed on 64 conformers of 16 different phosphines. Results from these calculations were compared to those previously obtained for MNDO and MINDO/3 calculations, and to experimental data. Cone angles calculated from the MM2 optimized geometries, were compared to Tolman's original work, and to values obtained from semiempirical calculations, and to experimental results. In general, it was found that weighted average cone angles best represent the size of phosphine ligands.<br>Department of Chemistry
APA, Harvard, Vancouver, ISO, and other styles
2

Ting, Fai Lung. "The chemistry of osmium and ruthenium carbonyl clusters with functionalized alkyne and phosphine ligands." HKBU Institutional Repository, 2001. http://repository.hkbu.edu.hk/etd_ra/296.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Schlipalius, David Ian. "Molecular genetics and linkage analysis of phosphine resistance in the lesser grain borer, rhyzopertha dominica (coleoptera: bostrichidae) /." [St. Lucia, Qld], 2004. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe18219.pdf.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Zhang, Yuanzhe. "Pd/azaborine-biaryl phosphine complexes: reaction development, mechanistic analysis, and investigations into metal-ligand coordination dynamics." Thesis, Boston College, 2021. http://hdl.handle.net/2345/bc-ir:109152.

Full text
Abstract:
Thesis advisor: Shih-Yuan Liu<br>Described herein are three research projects that focused on 1) the catalytic activities of Pd/azaborine-derived biary phosphine (Senphos) complexes in 1,3-enyne difunctionalization reactions and 2) the coordination behaviors of these Pd/Senphos complexes. In the first chapter, expansion of the substrate scope and mechanistic studies of the reported Pd/Senphos catalyzed site-, regio- and trans-selective hydroboration of 1,3- enynes are described. In the second chapter, the first intermolecular site-, regio- and transselective chloroboration and cyanoboration of enynes that are enabled by the Pd/Senphos catalytic system are presented. The cyanoboration products, namely vicinal boronsubstituted alkenylnitriles, are demonstrated as versatile synthetic building blocks. In the last chapter, the κ2-P-η2-B,C coordination behavior in a series of 1,2-, 1,3- and 1,4-Senphos ligated Pd(0) or Pd(II) complexes are evaluated based on solid-state structures and variable-temperature NMR measurements<br>Thesis (PhD) — Boston College, 2021<br>Submitted to: Boston College. Graduate School of Arts and Sciences<br>Discipline: Chemistry
APA, Harvard, Vancouver, ISO, and other styles
5

Plumier, Benjamin Mark. "3D ecosystem modeling of aeration and fumigation in Australian grain silos to improve efficacy against insects." Diss., Kansas State University, 2018. http://hdl.handle.net/2097/38833.

Full text
Abstract:
Doctor of Philosophy<br>Department of Grain Science and Industry<br>X. Susan Sun<br>With continued population growth, more food production will be required with lower resource inputs. A significant drain on resources is post-harvest loss due to insects, which results in loss of product, quality and market access, and increased grain spoilage. Aeration and fumigation are key tools to control insect growth in stored grains and grain foods. The implementation of aeration strategies in Australia is made difficult by the warm subtropical climate, meanwhile the success of fumigation is being threatened by the spread of insect resistance to the fumigant phosphine. This dissertation project seeks to improve the understanding of aeration and fumigation by modifying the Maier-Lawrence (M-L) 3D ecosystem model by adding insect growth equations and quantifying fumigant loss from sealed bulk grain silos. The improved model was used to examine aeration under Australian conditions, validate its capability to accurately describe fumigant concentrations during silo fumigation, determine the extent to which fumigations are influenced by operational variables and environmental conditions, and validate its capability to describe fumigant concentrations post-fumigation in order to investigate the time needed to clear a grain storage silo of fumigant in order to assure worker safety. Six aeration strategies were evaluated under Australian conditions. Of these strategies, two were found to be effective in lowering temperatures, i.e., fans were turned on when ambient temperature was less than 20oC, and less than internal grain temperature. The strategy based on temperature differential was the most effective because it cooled the interior of the grain mass with the least amount of energy (using the fewest fan run hours, and reaching 15oC an average of 11 days after than the fastest strategy). Using a 0oC temperature differential was the most effective strategy in terms of reducing insect growth. The expanded (M-L-P) model was then validated based on experimental fumigant concentrations. The model was effective in reproducing average fumigant concentrations and fumigant trends vertically through the grain mass, but was not able to reproduce lateral fumigant variations. Verifications of the model with two different periods of phosphine release (i.e., 24h and 30h) were tested. Based on a 24h phosphine release period the predicted Ct-product differed from the experimental value by 0.9%. A 30h release period predicted a Ct-product that differed by 4.3% from the experimental value but it was more accurate during the times of highest concentration. Increases in leakage reduced fumigant concentrations, but the size of the effect decreased as leakage grew. Increasing temperature and wind speed in the model led to decreased phosphine concentrations, with temperature changes having a more significant impact overall than wind speed changes for the conditions investigated. Decreasing silo surface area to volume ratio dampened the impact of changing weather conditions on phosphine concentrations. A fumigant venting experiment was conducted in a silo at Lake Grace, Australia, to investigate full scale desorption. Two equations estimating fumigant desorption were tested, with an average of 65.5% and -86.3% error. The length of venting periods was simulated to quantify hours needed to mitigate hazardous conditions. For the scenarios investigated 10 to 24 h of venting were needed to reduce residual fumigant concentration below 0.3 ppm depending on simulation assumptions.
APA, Harvard, Vancouver, ISO, and other styles
6

Li, Chi-kwan, and 李志君. "Gold(I) and Gold(II) phosphine complexes exhibiting weak AuI... AuI interactions and unsupported AuII-AuII bonds: syntheses, spectroscopy, host-guest chemistry and reactivity studies." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2002. http://hub.hku.hk/bib/B31243332.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Korb, Marcus. "Anionic Phospho-Fries Rearrangements for the Synthesis of Planar-Chiral Ferrocenes and their Application in (atropselective) Suzuki-Miyaura Reactions." Doctoral thesis, Universitätsbibliothek Chemnitz, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-229081.

Full text
Abstract:
The present PhD thesis describes the synthesis and characterization of novel planarchiral 1,2-P,O-ferrocenes and their application in the Pd-catalyzed Suzuki-Miyaura reaction. It was especially focused on the development of a new synthetic pathway to this type of substitution pattern by applying the anionic phospho-Fries rearrangement in ferrocene chemistry. Starting from hydroxy ferrocene, a high diversity of Fc–O–P- type (Fc = (n5-C5H5)(n5-C5H4)) compounds were synthesized, whereby the electronic properties of the phosphorus fragments were varied. The anionic phospho-Fries rearrangement successfully occurred subsequent to an ortho-lithiation with a non-nucleophilic base giving the 1,2-P,O-ferrocenes in up to quantitative yields. The usage of chiral pool-based alcohols for the synthesis of chiral ferrocenyl phosphates allowed a diastereoselective proceeding, giving single isomers in up to 95% de. Temperature-dependent investigations of mixed ferrocenyl-, phenyl- and Nheterocyclicphosphates revealed a limitation of ferrocenyl-based rearrangements per reaction step, contrary to phenyls. 1,2-P,O-ferrocenyl phosphonates could successfully be converted into phosphines by applying Stelzer P,C cross-coupling reactions on ferrocenes for the first time. Their usage as ligands for C,C cross-coupling reactions was confirmed by the synthesis of sterically hindered biaryls in high yields at 70°C with a low catalyst loading of 1 mol-% Pd. Functionalization of the 1,2-P,O -structural motif could be achieved by applying nucleophilic aromatic substitution reactions (SNAr) as an alternative pathway for the synthesis of ferrocenyl aryl ethers. Subsequent to a Fries rearrangement sterically-demanding 1,3-di-orthosubstituted aryloxy ferrocenes could be obtained. Multi SNAr reactions of hydroxyferrocenes at polyfluorinated arenes gave up to pentaferrocenyl-functionalized aryl ethers, whose electrochemical properties were investigated. The reaction of CH2-enlarged ferrocenylmethanols gave α-ferrocenylcarbenium ions instead of phosphates, while treating them with chlorophosphates. Enantiopure 2-P(S)Ph2-substituted derivatives of these ions underwent a subsequent intermolecular “S2−“ migration, resulting in thioethers, for example (Sp,Sp)-(2-(P(S)Ph2)FcCH2)2S, in a unique mechanism. Instead, the presence of electronrich arenes gave electrophilic aromatic substituted benzenes bearing chiral ferrocenylmethyl backbones. These type of ligands gave biaryls with up to 26 % ee<br>Die vorliegende Arbeit beschäftigt sich mit der Synthese und Charakterisierung von neuartigen planar-chiralen 1,2-P,O-ferrocenen sowie deren Anwendung in der Pd-katalysierten Suzuki-Miyaura Reaktion. Dabei lag der Focus in der Anwendung anionischer phospho-Fries Verschiebungen auf Ferrocene um dieses spezielle Substitutionsmuster erhalten zu können. Ausgehend von Hydroxyferrocenen wurde so eine Vielzahl neuer Verbindungen des Typs Fc–O–P (Fc = (n5-C5H5)(n5-C5H4)) synthetisiert, wobei die elektronischen Eigenschaften des Phosphor-tragenden Fragmentes variiert wurden. Die anionische phospho-Fries Verschiebung erfolgte im Anschluss einer ortho-Lithiierung mit einer nicht-nucleophilen Base, was 1,2-P,O-Ferrocene nahezu quantitative ergab. Durch die Verwendung von chiral-pool basierten Alkoholen für die Synthese chiraler Ferrocenylphosphate konnte eine diastereoselective 1,3-O-&gt;C Umlagerung mit Isomerenreinheiten von bis zu 95 % erreicht werden. Untersuchungen von gemischten Ferrocenyl-, Phenyl- und N-heterocyclischen Phosphaten bei verschiedenen Temperaturen zeigte eine Limitierung Ferrocenyl-basierter Umlagerungen pro Reaktionsschritt im Gegensatz zu denen von Phenylen. Die erhaltenen 1,2-P,O-Ferrocenylphosphate wurden erstmals mittels Stelzer P,C Kreuz-Kupplungsreaktionen erfolgreich in Phosphane umgesetzt. Deren Verwendung als Ligand in C,C Kreuz-Kupplungsreaktionen wurde am Beispiel der Synthese räumlich anspruchsvoller Biaryle in hohen Ausbeuten bei nur 70°C und niedrigen Katalysatorbeladungen von 1 mol-% Pd demonstriert. Die Funktionalisierung des 1,2-P,O-Strukturmotifes konnte durch die Anwendung von nucleophilen aromatischen Substitutionsreaktionen erreicht werden, die einen alternativen Zugang zu Ferrocenylarylethern bietet. Im Anschluss an eine Fries Umlagerung konnten so sterisch anspruchsvolle 1,3-di-ortho-substituierte Ferrocenylarylether erhalten werden. Durch mehrfache SNAr Reaktionen von Hydroxyferrocenen an polyfluorierten Aromaten wurden bis zu fünf-fach substituierte Ether erhalten, deren elektrochemischen Eigenschaften untersucht wurden. Die um eine CH2-Einheit verlängerten Ferrocenylmethanole gaben bei Reaktion mit Chlorophosphaten alpha Ferrocenylcarbeniumionen anstelle der gewünschten Phosphate. Enantiomerenreine 2-P(S)Ph2-substituierte Derivate dieser Ionen durchliefen anschließend einen intermolekularen ”S2–“ Transfer in einem einzigartigen Mechanismus, was bspw. in Thioethern des Typs (Sp,Sp)-(2-(P(S)Ph2)FcCH2)2S resultierte. In Anwesenheit elektronenreicher Aromaten wurden elektrophile aromatischen Substitutuionen und die Bildung chiraler ferrocenylmethyl-substitutuierter Benzene beobachtet. Deren Einsatz als Ligand ergab Biaryle mit bis zu 26 % ee
APA, Harvard, Vancouver, ISO, and other styles
8

Philippon, David. "Lubrification par la phase gazeuse : tribochimie des additifs phosphorés et boratés." Phd thesis, Ecole Centrale de Lyon, 2007. http://tel.archives-ouvertes.fr/tel-00280892.

Full text
Abstract:
La formulation des lubrifiants utilisés dans l'automobile est complexe du fait du nombre important d'additifs mélangés aux huiles de base. Pour orienter le choix des formulateurs, il est non seulement nécessaire de connaître le mécanisme d'action de chaque additif mais aussi les interactions entre ces additifs. Pour mieux appréhender ces mécanismes, une démarche originale a été mise en place dans cette étude. Celle-ci consiste à simuler expérimentalement la lubrification en régime limite par la lubrification en phase gazeuse. Pour cela, des molécules de faible poids moléculaire modélisant les différents constituants d'un lubrifiant ont été introduites sous ultravide. Ce type d'expérience a pu être réalisé grâce au développement d'un nouveau Tribomètre à Environnement Contrôlé (TEC) connecté à un système d'analyse de surface. Cette technique permet de simplifier le système tribologique et d'étudier in situ les tribofilms formés en phase gazeuse par des analyses de surface (XPS/AES). Différentes molécules ont été étudiées : triméthylborate (TMB), triméthylphosphite (TMPi) et triméthylphosphate (TMPa) modélisant respectivement les additifs boratés et phosphorés des lubrifiants de transmission. Cette simulation expérimentale a pu être validée en comparant les résultats en phase gazeuse avec ceux obtenus en phase liquide. Des observations en microscopie optique et des analyses chimiques ont mis en évidence la formation de tribofilms. Les expériences réalisées en présence de TMB ont permis de confirmer les résultats de la littérature sur la formation d'un tribofilm non sacrificiel de borates de type « minéral ». Les expériences réalisées avec les molécules phosphorées ont permis de montrer la différence entre les phosphates et les phosphites, notamment la formation d'un composé de type phosphure de fer en présence de TMPi. Les analyses in situ sur les tribofilms obtenus en présence de TMPi ont permis de déterminer le mécanisme de formation du composé phosphure de fer. La réalisation de mélanges de gaz a permis également de mettre en avant les effets de synergie et d'antagonisme entre les additifs
APA, Harvard, Vancouver, ISO, and other styles
9

Scullion, Stanley Paul. "Amperometric monitoring of nitrate and phosphate." Thesis, Loughborough University, 1989. https://dspace.lboro.ac.uk/2134/26816.

Full text
Abstract:
Methods are presented here for the determination of nitrate by electrochemical techniques. The reaction of nitrate with various organic reagents was studied by differential pulse polarography and a method described based on the nitration of benzoic acid. A rectilinear response was obtained over a 10-6 to 5x10-3M concentration range with reproducibility of < 2% at higher nitrate concentrations.
APA, Harvard, Vancouver, ISO, and other styles
10

Mambingo, Doumbe Samuel. "Simulation de la phase gazeuse des réactions tribochimiques des additifs phosphorés et soufrés." Thesis, Ecully, Ecole centrale de Lyon, 2012. http://www.theses.fr/2012ECDL0063.

Full text
Abstract:
La maîtrise de l’additivation est l’un des enjeux majeurs de la formulation des lubrifiants, notamment pour l’industrie automobile. La formulation d’une huile est toutefois très complexe en raison du nombre important d’additifs et des nombreuses interactions possibles entre additifs, notamment entre les additifs de surface. Les phosphites organiques et les polysulfures organiques ont déjà montré leur efficacité en tant qu’additifs de surface. Toutefois malgré leur usage répandu dans les formulations des lubrifiants automobiles, peu d’études traitent des interactions pouvant avoir lieu entre ces deux types de composés. Ce travail de thèse a pour objectif la compréhension des mécanismes d’interaction (antagonisme/synergie) pouvant exister entre les phosphites organiques et les polysulfures organiques. Pour cela, une approche originale sur la lubrification par la phase gazeuse s’est avérée très pertinente. Le couplage du Tribomètre à Environnement Contrôlé (TEC) avec les systèmes d’analyses de surface XPS/Auger a permis d’analyser les tribofilms générés in situ et d’éviter ainsi toute contamination et/ou oxydation du tribofilm avant analyse. Les molécules choisies sont les additifs de lubrification industriels (polysulfures tertaires) à faibles poids moléculaires ou alors des molécules à faible poids moléculaires ayant les mêmes fonctions chimiques que les additifs usuels : trimethyl phosphite (TMPi), dimethyl phosphite (DMPi). L’étude des réactions des tribochimiques des molécules phosphorés a permis de mettre en évidence le rôle ambivalent du DMPi qui se comporte à la fois comme un phosphite pour former un phosphure de fer et comme un phosphate. Le mécanisme formation du phosphure de fer a peu être étayé par la réalisation de calculs ab initio sur l’adsorption dissociative du TMPi sur une surface de fer. Les TPS étudiés génèrent quant à eux des tribofilms à base disulfure de fer. Les mélanges binaires réalisés en phase gazeuse ont permis de mettre en évidence l’importance des rapports de concentrations des vapeurs introduites et du mode d’introduction des molécules dans le tribomètre. Les résultats obtenus en tribologie en phase gazeuse ont été corroborés par des essais complémentaires en phase liquide<br>Mastering the addivation is one of the biggest issues for the lubricants formulation, especially in the automobile industry. However automotive lubricants are very complex systems due to the numerous additives mixed with base oils. Many interactions can occur between additives, especially between surface additives. Organic phosphites and organic polysulphides have already demonstrated their effectiveness as surface additives. However, despite their widespread use in the formulations of automotive lubricants, few studies deal with the interactions taking place between these two types of compounds. The aim of this study is to understand the interactions, antagonistic or synergetic effect between these kinds of additives using Gas Phase Lubrication (GPL) approach. A Environmental Controlled Tribometer (TEC) was used as a tool to simulate the interaction between organophosphate additives and polysulfurous additives. In situ surface analysis was performed in the tribofilm formed during friction using of X-ray Photoelectron Spectroscopy (XPS) and Auger Electron Spectroscopy(AES) in order to avoid any oxidation or air contamination. The molecules selected for the study can be same as the additive like the TPS molecules which are widely used as lubricant additives. Howeverto simulate the phosphite chemical function of phosphite additives, we need to select smaller molecule having the same chemical function. These molecules are dimethyl phosphite (DMPi), trimethylphosphate (TMPi) for simulating the phosphite chemical function and organic polysulphides (TPS44and TPS32). The study of the tribochemical reactions of organic phopshites allowed to clearly characterise the ambivalence of DMPi, which can react like a phosphite and induce iron phosphide formation or react like a phosphate. Ab initio numerical simulation on TMPi dissociative adsorption was carried out to identify the reactions pathways leading to iron phosphide formation. The tribochemical reaction of TPS44 on metallic iron surface leads to the formation of iron disulphidebased tribofilm. The binary vapours mixtures studied by GPL allowed to clearly identify the importance of the vapour concentration ratio between phosphite and polysulphide. Liquid phase experiments were also carried out to confirm the trend observed in GPL approach
APA, Harvard, Vancouver, ISO, and other styles
More sources

Books on the topic "Phosphine – Analysis"

1

Buscher, Brigitte Agnes Peter. Capillary electromigration strategies in inositol phosphate analysis. University of Leiden, 1998.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
2

El-Shall, Hassan E. Effect of rock impurities as determined from production data: Final report. Florida Institute for Phosphate Research, 2004.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
3

Watson, A. D. Sirhan-Turayf phosphate project: Sample preparation procedures and Craven Series control for phosphate analyses. Ministry of Petroleum and Mineral Resources, Deputy Ministry for Mineral Resources, 1986.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
4

Gurney, D. A. Phosphate analysis of soils: A guide for the field archaeologist. Institute of Field Archaeologists, 1985.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
5

Parekh, Payal. Decoupling of iron and phosphate in the global ocean. Massachusetts Institute of Technology, 2003.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
6

Goncharov, E. G. Poluprovodnikovye fosfidy i arsenidy kremnii͡a︡ i germanii͡a︡. Izd-vo Voronezhskogo universiteta, 1989.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
7

Bruening, Joseph A. Analysis of radiation damaged and annealed gallium arsenide and indium phosphide solar cells using deep level transient spectroscopy. Naval Postgraduate School, 1993.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
8

Pinzon, Dimas. Analysis of radiation damaged and annealed gallium arsenide and indium phosphide solar cells using deep level transient spectroscopy techniques. Naval Postgraduate School, 1991.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
9

May, Alexander. Assessment of Ra²²⁶ and toxic element distribution at Tennessee Valley Authority phosphate slag stockpiles, Muscle Shoals, AL. U.S. Dept. of the Interior, Bureau of Mines, 1990.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
10

May, Alexander. Assessment of Ra p226 s and toxic element distribution at Tennessee Valley Authority phosphate slag stockpiles, Muscle Shoals, AL. Dept. of Interior, 1989.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Book chapters on the topic "Phosphine – Analysis"

1

Breuer, D. "Phosphine." In Analyses of Hazardous Substances in Air. Wiley-VCH Verlag GmbH, 2003. http://dx.doi.org/10.1002/3527600191.ch13.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Bronner, F., D. Pansu, and W. D. Stein. "Analysis of Calcium Transport in Rat Intestine." In Phosphate and Mineral Homeostasis. Springer US, 1986. http://dx.doi.org/10.1007/978-1-4684-5206-8_28.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Lindberg, Olov, and Lars Ernster. "Determination of Organic Phosphorus Compounds by Phosphate Analysis." In Methods of Biochemical Analysis. John Wiley & Sons, Inc., 2006. http://dx.doi.org/10.1002/9780470110195.ch1.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Jin, Yi, Robert W. Molt, and G. Michael Blackburn. "Metal Fluorides: Tools for Structural and Computational Analysis of Phosphoryl Transfer Enzymes." In Phosphate Labeling and Sensing in Chemical Biology. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-60357-5_2.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Flügge, Ulf Ingo, Karsten Fischer, and Armin Gross. "Structural Analysis of the Triose Phosphate-3-Phosphoglycerate-Phosphate Translocator from Spinach Chloroplasts." In Current Research in Photosynthesis. Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0511-5_676.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Doku, G. N., and S. J. Haswell. "Micro-Analytical (μFIA) Reactor for the Determination of Phosphate as Orthophosphate." In Micro Total Analysis Systems ’98. Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-011-5286-0_83.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Engelbrecht, Johann P., Stéfan W. de Bruyn, and Johan P. R. de Villiers. "An Automated On-Stream XRD Analyser for Process Control in the Phosphate Industry." In Advances in X-Ray Analysis. Springer US, 1993. http://dx.doi.org/10.1007/978-1-4615-2972-9_39.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Soto-Sanchez, C., Andrés Olmedo-Payá, D. de Santos-Sierra, C. Agullo, and Eduardo Fernández. "A Novel Approach for Quantitative Analysis of 3D Phosphenes." In Natural and Artificial Models in Computation and Biology. Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-38637-4_35.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Cocuron, Jean-Christophe, and Ana Paula Alonso. "Liquid Chromatography Tandem Mass Spectrometry for Measuring 13C-labeling in Intermediates of the Glycolysis and Pentose Phosphate Pathway." In Plant Metabolic Flux Analysis. Humana Press, 2013. http://dx.doi.org/10.1007/978-1-62703-688-7_9.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Nakanishi, Tomoko M. "Real-Time Element Movement in a Plant." In Novel Plant Imaging and Analysis. Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-4992-6_4.

Full text
Abstract:
AbstractWe developed an imaging method utilizing the available RIs. We developed two types of real-time RI imaging systems (RRIS), one for macroscopic imaging and the other for microscopic imaging. The principle of visualization was the same, converting the radiation to light by a Cs(Tl)I scintillator deposited on a fiber optic plate (FOS). Many nuclides were employed, including 14C, 18F, 22Na, 28Mg, 32P 33P, 35S, 42K, 45Ca, 48V, 54Mn, 55Fe, 59Fe, 65Zn, 86Rb, 109Cd, and 137Cs.Since radiation can penetrate the soil as well as water, the difference between soil culture and water culture was visualized. 137Cs was hardly absorbed by rice roots growing in soil, whereas water culture showed high absorption, which could provide some reassurance after the Fukushima Nuclear Accident and could indicate an important role of soil in firmly adsorbing the radioactive cesium.28Mg and 42K, whose production methods were presented, were applied for RRIS to visualize the absorption image from the roots. In addition to 28Mg and 42K, many nuclides were applied to image absorption in the roots. Each element showed a specific absorption speed and accumulation pattern. The image analysis of the absorption of Mg is presented as an example. Through successive images of the element absorption, phloem flow in the aboveground part of the plant was analyzed. The element absorption was visualized not only in the roots but also in the leaves, a basic study of foliar fertilization.In the case of the microscopic imaging system, a fluorescence microscope was modified to acquire three images at the same time: a light image, fluorescent image, and radiation image. Although the resolution of the image was estimated to be approximately 50 μm, superposition showed the expression site of the transporter gene and the actual 32P-phosphate absorption site to be the same in Arabidopsis roots.
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Phosphine – Analysis"

1

Sehgal, Himani Dua, Yogesh Pratap, Mridula Gupta, Sneha Kabra, and Praveen Pal. "Comparative Analysis of Junctionless FinFET and Inverted Mode FinFET as Phosphine (PH3) Gas Sensor." In 2020 5th International Conference on Devices, Circuits and Systems (ICDCS). IEEE, 2020. http://dx.doi.org/10.1109/icdcs48716.2020.243579.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Nanduri, D., M. S. Humayun, R. J. Greenberg, M. J. McMahon, and J. D. Weiland. "Retinal prosthesis phosphene shape analysis." In 2008 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE, 2008. http://dx.doi.org/10.1109/iembs.2008.4649524.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Ergun, Celaletdin, John W. Halloran, Chang-Jun Bae, and Filiz C¸ınar S¸ahin. "Phase Interaction in Hydroxylapatite/LaPO4 Composite." In ASME 8th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2006. http://dx.doi.org/10.1115/esda2006-95205.

Full text
Abstract:
Hydroxylapatite composites with lanthanum phosphate were prepared with pressureless air sintering for 2 hours at different temperatures between 500°C and 1300°C. The interaction between the phases was monitored with XRD analysis. At sintering temperatures higher than 700°C, hydroxylapatite and lanthanum phosphate phase reacted and formed Ca8 La2 (PO4)6O2 as byproduct. In the mean time, hydroxylapatite decomposed and formed tricalcium phosphate.
APA, Harvard, Vancouver, ISO, and other styles
4

Ergun, Celaletdin, John W. Halloran, and Chang-Jun Bae. "Phase Interaction in Hydroxylapatite/CaTiO3 Composite." In ASME 8th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2006. http://dx.doi.org/10.1115/esda2006-95206.

Full text
Abstract:
Hydroxylapatite composites with calcium titanium oxide were prepared with pressureless air sintering for 2 hours at different temperatures between 500°C and 1300°C. The interaction between the phases was monitored with XRD analysis. At sintering temperatures near 1100°C, slight decomposition of hydroxylapatite and formation of tricalcium phosphate was observed. However, sintering at the temperature higher than 1100°C, tricalcium phosphate disappeared most probably due to the incorporation of CaTiO3 in the hydroxylapatite structure.
APA, Harvard, Vancouver, ISO, and other styles
5

Arata, Ikuo, Masanori Kobayashi, Shunsuke Matsuda, and Hirotoshi Terada. "Evaluation of Gallium Phosphide Substrate for Solid Immersion Lens." In 2018 IEEE International Symposium on the Physical and Failure Analysis of Integrated Circuits (IPFA). IEEE, 2018. http://dx.doi.org/10.1109/ipfa.2018.8452589.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Fiaschi, Daniele, Giampaolo Manfrida, Michela Massini, and Giacomo Pellegrini. "Some Innovative Readily Applicable Proposals for Chemical Separation and Sequestration of CO2 Emissions From Power Plants." In ASME 7th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2004. http://dx.doi.org/10.1115/esda2004-58508.

Full text
Abstract:
The goal of the present manuscript is the investigation of two novel systems for partial CO2 capture from the exhausts of fossil fuelled powerplants. These systems should be relatively cheap and easily applicable to existing powerplants with minor modification, in order to make them accessible by a large range of users and favour a significant diffusion of partial CO2 sequestration. Two basic processes were proposed: 1. Absorption with a liquid solution of water and NH3; 2. Absorber/desorber system with a liquid solution of water and phosphates. In the first one, the exhausts react into an absorber column with a liquid sorbent, which is a solution of water and ammonia. The process sequestrates the CO2 in carbammate and bicarbonate and the final product are salt of ammonia, i.e. ammonium carboamate (NH4HCO3) and ammonium bicarbonate (NH4NH2COO). The outgoing streams of this process are the exhaust gas with a reduced content of CO2 and a secondary product formed by salts of ammonium, which have an interesting market potential as fertilizers. The obtained CO2 reduction level was more than 40%, while the amount of secondary products is high enough to get it marketable. In the second process, the exhausts passing through an absorber column react with a liquid sorbent, which is a solution of water and sodium (or potassium) phosphate. The process sequestrates the CO2 in bicarbonate ions by means of the ions phosphate and the outlet stream is a solution of water and phosphate and carbonate ions. This stream is collected in a desorbing column, where the phosphate ions are almost completely regenerated. The CO2 reduction level is always higher than 20% and it can also reach very high values, depending on the parameters of process.
APA, Harvard, Vancouver, ISO, and other styles
7

Hu, Yinquan, Xiaobing Wu, Guorui Hu, and Qiheng Fan. "Analysis of Lithium Iron Phosphate Battery Damage." In 2015 International Symposium on Material, Energy and Environment Engineering. Atlantis Press, 2015. http://dx.doi.org/10.2991/ism3e-15.2015.46.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Zaki, Tarek G. "Containment Sump Neutralization Using Trisodium Phosphate: Parametric Analysis." In 10th International Conference on Nuclear Engineering. ASMEDC, 2002. http://dx.doi.org/10.1115/icone10-22111.

Full text
Abstract:
For post-LOCA conditions, the pH of the aqueous solution collected in the containment sump after completion of injection of containment spray and ECC water, and all additives for reactivity control, fission product removal, and other purposes, should be maintained at a level sufficiently high to provide assurance that significant long-term iodine re-evolution does not occur. Long-term iodine retention may be assumed only when the equilibrium sump solution pH is above 7. This pH value should be achieved by the onset of the spray recirculation mode. A trisodium phosphate (TSP)-based, passive system can be used to achieve this pH value. This is a proven technology that is already in use in nuclear power plants. This system consists of several wire mesh baskets, filled with TSP and strategically located in the sump in order to insure timely dissolution of TSP and rapid pH rise under LOCA conditions. Accurate determination of the total quantity of TSP required to raise the pH of borated water in the sump to within the acceptable range is the key element to a proper design of this system. However, this type of analysis is quite involved and highly iterative, which requires the use of a computer program. This paper describes the basis for a computer program that determines the required quantity of TSP as a function of the quantity of borated water in the sump, the boron concentration, the sump temperature, and the specified pH value. The equilibrium quantities of boric acid species are calculated iteratively based on its molal equilibrium quotients. The equilibrium quantities of phosphoric acid species are calculated iteratively based on its dissociation constants. The charge balance error (CBE) is the sum of ionic charges for all species and ions in the solution, including sodium. All species are in equilibrium when the CBE reduces to zero. The paper also presents the results of a parametric analysis that is performed using this computer program. Ranges of borated water quantity, boron concentration, and sump temperature are considered. For these borated water quantities and sump conditions, TSP quantities required to achieve sump pH values that range from 7.0 to 8.0 are determined. The results show significant dependence on temperature. In addition, the paper provides recommendations regarding TSP basket sizing and locations within the sump, as well as pH surveillance test requirements.
APA, Harvard, Vancouver, ISO, and other styles
9

Marongiu, A., A. Damiano, and M. Heuer. "Experimental analysis of lithium iron phosphate battery performances." In 2010 IEEE International Symposium on Industrial Electronics (ISIE 2010). IEEE, 2010. http://dx.doi.org/10.1109/isie.2010.5637749.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Ergun, Celaletdin, Zafer Evis, and Robert H. Doremus. "Phase Interactions in Monoclinic Zirconia Reinforced Hydroxylapatite Bioceramics." In ASME 7th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2004. http://dx.doi.org/10.1115/esda2004-58178.

Full text
Abstract:
Hydroxylapatite composites with pure zirconia were prepared with pressureless air sintering and hot pressing for 1 hour at different temperatures between 900°C and 1300°C. The interaction between the phases was monitored with XRD and thermal analysis. At sintering temperatures higher than 1000°C, an apparent Ca diffusion occurred from hydroxylapatite to pure zirconia phase and changed its structure from monoclinic to tetragonal/cubic. In the mean time, hydroxylapatite decomposed and formed tricalcium phosphate. Also, a reaction was occurred at 1220°C between hydroxylapatite and zirconia phase forming CaZrO3. The existence of air in the processing environment increased the reactivity between hydroxylapatite and zirconia.
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Phosphine – Analysis"

1

Zlateva, Boika, Boyan Dumanov, and Miroslav Rangelov. Applications of Soil Phosphate Analysis for Identification of Activity Areas at Doschkere, SE Bulgaria. "Prof. Marin Drinov" Publishing House of Bulgarian Academy of Sciences, 2018. http://dx.doi.org/10.7546/crabs.2018.06.04.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Tappan, D. V., and E. Heyder. A GC/MS (Gas Chromatographic/Mass Spectrometric) Analysis for Trimethylolpropane Phosphate on Aircraft Hoses. Defense Technical Information Center, 1988. http://dx.doi.org/10.21236/ada198977.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Szecsody, James E., Vincent R. Vermeul, Jonathan S. Fruchter, et al. Hanford 100-N Area In Situ Apatite and Phosphate Emplacement by Groundwater and Jet Injection: Geochemical and Physical Core Analysis. Office of Scientific and Technical Information (OSTI), 2010. http://dx.doi.org/10.2172/985586.

Full text
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Phosphine – Analysis' for particular source types:
Journal articles Dissertations / Theses Books
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography