Relevant bibliographies by topics / Nickel content

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Academic literature on the topic 'Nickel content'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Nickel content"

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Liu, Xinxin, Yitong Tan, Xinhua Zhang, Qiangqiang Liao, and Zhiqin Wang. "Fabrication and performance evaluation of nickel-rich conductive coating for carbon steel grounding grids in saline-alkali soil solution." Corrosion Reviews 38, no. 3 (May 8, 2020): 263–71. http://dx.doi.org/10.1515/corrrev-2019-0112.

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AbstractA nickel-rich conductive anti-corrosive coating (CACC) was fabricated to improve the corrosion resistance of the carbon steel grounding materials. The coating was tested using surface contact resistance measurement, electrochemical impedance spectroscopy (EIS) and surface characterization. The results indicate that the increase of the nickel powder content in the coating induces its electrical conductivity enhancement; the surface contact resistance is as low as 0.05 Ω/cm2 when the nickel powder content is 20%. The EIS data show that the anti-corrosive performance of the coating with 20% nickel powder content in three soil saline-alkali solutions (mild, moderate and severe) is higher than that with 40% nickel powder content, and the impedance of the coating decreases with the increase of the salt concentration. It is detected that 20% nickel powder content can achieve a good balance between low surface contact resistance and high corrosion resistance of the coating.
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Tomovic, V. M., Lj S. Petrovic, M. R. Jokanovic, Z. S. Kevresan, N. R. Dzinic, T. A. Tasic, and P. M. Ikonic. "Nickel levels of liver from ten different pig genetic lines produced in Vojvodina." Biotehnologija u stocarstvu 27, no. 4 (2011): 1793–99. http://dx.doi.org/10.2298/bah1104793t.

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The content of nickel was investigated in the liver of sixty-nine pigs from ten different genetic lines, produced in Vojvodina. Nickel was determined by the flame atomic absorption spectrometry after mineralization by dry ashing. The difference in the nickel content among different genetic lines of pigs was not significant (P > 0.05) in the analyzed liver tissues. Nickel levels ranged from 13.02 to 68.21 ?g/100g with a general average of 26.73 ?g/100g. Average nickel content, found in this study, is in agreement with the contents observed in pig liver in other countries.
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Raith, Ludwing, and Klaus Jaeger. "The nickel content of chalk - cause of contact dermatitis?" Contact Dermatitis 14, no. 1 (January 1986): 61. http://dx.doi.org/10.1111/j.1600-0536.1986.tb01155.x.

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Yamanoglu, R., E. Karakulak, and M. Zeren. "Mechanical and wear properties of pre-alloyed molybdenum P/M steels with nickel addition." Journal of Mining and Metallurgy, Section B: Metallurgy 48, no. 2 (2012): 251–58. http://dx.doi.org/10.2298/jmmb111128026y.

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The aim of this study is to understand the effect of nickel addition on mechanical and wear properties of molybdenum and copper alloyed P/M steel. Specimens with three different nickel contents were pressed under 400 MPa and sintered at 1120?C for 30 minutes then rapidly cooled. Microstructures and mechanical properties (bending strength, hardness and wear properties) of the sintered specimens were investigated in detail. Metallographical investigations showed that the microstructures of consolidated specimens consist of tempered martensite, bainite, retained austenite and pores. It is also reported that the amount of pores varies depending on the nickel concentration of the alloys. Hardness of the alloys increases with increasing nickel content. Specimens containing 2% nickel showed minimum pore quantity and maximum wear resistance. The wear mechanism changed from abrasive wear at low nickel content to adhesive wear at higher nickel content.
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Dai, Shu Juan, and Yao Liu. "The Experiment Study on Making Ultrafine Superfine Nickel Powder by N2H4–KHB Reduction and H2 Reduction." Advanced Materials Research 295-297 (July 2011): 677–80. http://dx.doi.org/10.4028/www.scientific.net/amr.295-297.677.

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The N2H4–KHB reduction then CH3OH watering and H2 reduction system was used to make superfine nickel powder by using nickel sulfate as material.The superfine nickel powder of the specific surface area of the nickel powde being 4.24m2/g, spheric shape with grain size 0.5-0.9μm,nickel content being over 99.5%,The toll nichel recovery being over 99.5% was made on the condition of reaction temperature 60°C, reaction time 150-180min,pH 8.0-8.5,[Ni]=1.25M,N2H4/Ni=1.35（mol ratio）,sodium hexametaphosphate of 1.5‰ as additive，the dosage of KHB of 8.37×10-3g/g Ni and washing by carbinol,reducing by H2.
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Roventi, G., R. Cecchini, A. Fabrizi, and T. Bellezze. "Electrodeposition of nickel–zinc alloy coatings with high nickel content." Surface and Coatings Technology 276 (August 2015): 1–7. http://dx.doi.org/10.1016/j.surfcoat.2015.06.043.

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Husby, Hans, Philip Wagstaff, Mariano Iannuzzi, Roy Johnsen, and Mariano Kappes. "Effect of Nickel on the Hydrogen Stress Cracking Resistance of Ferritic/Pearlitic Low Alloy Steels." Corrosion 74, no. 7 (March 5, 2018): 801–18. http://dx.doi.org/10.5006/2724.

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Nickel additions to low alloy steels improve mechanical and technological properties. However, Part 2 of ISO Standard 15156 limits the nickel content to a maximum of 1 wt% in oil and gas environments containing H2S because of controversial concerns regarding sulfide stress cracking. The objective of this work was to investigate the effect of nickel in solid solution in the ferrite phase on hydrogen stress cracking resistance. Ferritic/pearlitic research-grade low alloy steels with nominal nickel contents of 0, 1, 2, and 3 wt% were tested by the slow strain rate test method with cathodic hydrogen charging to −1.05 VAg/AgCl and −2 VAg/AgCl. No difference in fracture mode or morphology was found between the alloys. However, the plastic elongation ratios and reduction in area ratios decreased with increasing nickel content when tested at −2 VAg/AgCl. The direct and indirect effects of nickel, such as the influence of an increasing fraction of pearlite with increasing nickel content, are discussed.
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YAMASHITA, Hiroya, Takeshi YAMAMURA, and Katsutoshi YOSHIMOTO. "Nickel-Tin Alloys with a High Nickel Content Prepared by Electrodeposition." Denki Kagaku oyobi Kogyo Butsuri Kagaku 62, no. 1 (January 5, 1994): 48–55. http://dx.doi.org/10.5796/electrochemistry.62.48.

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Zeng, Yuqiao, Chunling Qin, Nobuyuki Nishiyama, and Akihisa Inoue. "New nickel-based bulk metallic glasses with extremely high nickel content." Journal of Alloys and Compounds 489, no. 1 (January 2010): 80–83. http://dx.doi.org/10.1016/j.jallcom.2009.09.016.

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Geng, Qiu Ju, and Xue Wei. "Determination of Tin and Nickel Content in Pyrophosphate Tin-Nickel Alloy Plating Bath." Advanced Materials Research 233-235 (May 2011): 214–18. http://dx.doi.org/10.4028/www.scientific.net/amr.233-235.214.

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Tin and nickel ions are in stable complexing form in Pyrophosphate tin-nickel alloy plating bath, this paper uses back-titration of Zn2+ standard solution to determine total amount of tin and nickel ions, and spectrophotometry to determine content of nickel ions in the bath to study interference and elimination methods of co-existing components. The results show that: eliminate the interference of pyrophosphate by heating the solution to hydrolyse and mask Sn4+ and Fe3+ effectively with triethanolamine, the total measurement error is about 0.91%, standard deviation is 0.0141; The recovery of determination for nickel ion content is 99.13%, and standard deviation is 0.0180; The method i-s simple, fast and is able to meet the analytical requirements for controlling the plating quality.
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Dissertations / Theses on the topic "Nickel content"

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Mugford, Sam. "The molecular basis of nickel hyperaccumulation in Alyssum L." Thesis, University of Oxford, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.670183.

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Boulet, Frederic. "Mycorrhizal symbiosis as a strategy for survival in ultramafic soils." University of Western Australia. Soil Science and Plant Nutrition Discipline Group, 2003. http://theses.library.uwa.edu.au/adt-WU2004.0051.

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Ultramafic soils enriched in nickel, such as found in Australia and New Caledonia, are associated with unique, diverse and poorly known vegetation communities. Re-establishment of these highly specific ecosystems is still a challenge for Ni mining companies. Ultramafic vegetation communities are the outcome of a long evolution process resulting in their adaptation to the extreme soil conditions found on ultramafic outcrops. Mycorrhizal fungi, a very common plant symbiont, are generally thought to be beneficial to plants in other ecosystems, providing plants with phosphorus and even promoting metal tolerance in plants in some cases. We examined the hypothesis that mycorrhizal fungi may contribute to the survival of plants in ultramafic soil conditions. Bandalup Hill, an ultramafic outcrop enriched in Ni (South West of Western Australia) was selected to assess the contribution of mycorrhizal fungi to ultramafic plants. Soil constraints, in particular the degree of Ni toxicity, were assessed at two sites with ultramafic soils within the outcrop. Total metal, nutrient, DTPA extractable Ni and available P were measured in soil while Ni, Ca and Mg were tested in the soil solution. In addition, nutrients and metals were analyzed in shoots of some plant species occurring at each site: Eucalyptus flocktoniae, Melaleuca pomphostoma, Melaleuca coronicarpa and Hakea verucosa. Topsoils in Bandalup Hill and plant shoots had high levels of Ni, and very low levels of P, K and N. Variation in DTPA extractable Ni between sites reflected the variation in shoot Ni level of E. flocktoniae and M. pomphostoma. Variations in soil solution Ni levels reflected variations in shoot Ni levels of M. coronicarpa and H. verucosa between sites. The germination requirements of the plant species used to assess the soil constraints was assessed. Species selected included Eucalyptus flocktoniae, Melaleuca coronicarpa, and Hakea verucosa. Seeds of E. flocktoniae and M. coronicarpa had a higher germination rate if pre-treated with smoke water, while no pre-treatment was required to germinate H. verucosa seeds. The unusual germination requirement of E. flocktoniae and M. coronicarpa involve complex chemical signals that may be present in the soil when the conditions are more favorable for plant establishment. Such unusual germination requirement may represent an adaptation to the hostile conditions of the ultramafic soils of Bandalup Hill. The mycorrhizal association and root characteristics of the selected plant species was also assessed after 8 weeks of growth in undisturbed ultramafic topsoil cores from Bandalup Hill. Roots of these species (including H. verucosa from a previously designated non-mycorrhizal family, Proteaceae) were associated with mycorrhizal fungi. Roots of E. flocktoniae and M. coronicarpa were colonized by both arbuscular mycorrhizal fungi (AMF) and ectomycorrhizal fungi (ECM), while roots of H. verucosa only contained some AM fungal structures. All species had high shoot to root ratios and their root characteristics reflected their association with mycorrhizal fungi. Based on the previous observations, uninoculated and inoculated E. flocktoniae seedlings were grown for 10 to 16 weeks in sand amended with Ni at 0, 0.2, 1 and 2.3 mg/kg. Mycorrhizal inoculum consisted of spores of Pisolithus sp. (ECM) or a mix of AMF spores and colonized root fragments, both originating from Bandalup Hill. Another inoculum consisted in Pisolithus sp. spores from a site with ultramafic soils in New Caledonia. Inoculation with AM and ECM fungi from Bandalup Hill was beneficial to E. flocktoniae. Benefits consisted mainly of a reduction of Ni shoot translocation at the highest Ni soil level. At 1 mg/kg soil Ni, E. flocktoniae exhibited a certain degree of tolerance to Ni. A substantial increase in growth and nutrient uptake with Pisolithus sp. from Western Australia was also observed. The contribution of AM fungi from Bandalup Hill to E. flocktoniae, M. coronicarpa, H. verucosa, and Trifolium subterraneum (clover) was then examined in ultramafic soil from Bandalup Hill.Steaming of ultramafic soil increased the availability and plant uptake of P. Consequently, uninoculated seedlings grew better, and inoculation with AM fungi decreased the growth of native plant species but did not affect their shoot Ni concentration. The presence of AM fungi increased the concentration of P in shoots of native plants species. Inoculation had no effect on the growth and nutrient content of subterranean clover. As mining activities have the potential to reduce the infectivity of AM fungi in topsoils, the effect of disturbance and storage practices on the AM infectivity of ultramafic topsoils collected in summer or winter from Bandalup Hill was investigated. Disturbance consisted in passing topsoil through a 2mm seive and cutting roots into 1cm fragments. Disturbed topsoil was then stored at room temperature in pots that were either sealed from the atmosphere or left open, and pots were maintained at field capacity. E. flocktoniae seedlings were planted in undisturbed and disturbed topsoil just after topsoil collect and then after 3, 6 and 9 months of topsoil storage. AM fungi present in the topsoil collected in summer was less susceptible to initial disturbance than AM fungi present in topsoil collected during winter. Also, storage of topsoil in sealed pots watered to field capacity was more detrimental to its infectivity than storage of topsoil in dry conditions. Mycorrhizal fungi can contribute to the survival of some native plant species in the ultramafic soils of Bandalup Hill and they may represent another strategy to improve the success of Ni mine revegetation. However, such contribution may not be the unique avenue for native plants to survive in ultramafic soils of Bandalup Hill.
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Svensson, Sara. "Minimizing the sulphur content in Kraft lignin." Thesis, Mälardalen University, School of Sustainable Development of Society and Technology, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-998.

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The aim of this project is to investigate the possibilities of minimizing the sulphur content in Kraft lignin. Kraft lignin contains about 1.5 to 3% sulphur. The sulphur is believed to be present in lignin as inorganic sulphur, as elemental sulphur, as adsorbed polysulphide and/or as organically bound sulphur. For the determination of these different types of sulphur components, different approaches and methods were used. For the determination of inorganic sulphur, lignin was washed with water at pH 6 and pH 2 and the wash waters were analysed with ion chromatography (IC). For the determination of total sulphur content in the lignin, two methods were used; Schöniger combustion followed by ion chromatography (IC) and wet digestion followed by inductively coupled plasma (ICP). The elemental sulphur content in water-extracted lignin was determined after n-pentane extraction. ICP analysis was performed on the washed lignin.

Calcium present in the lignin may bind polysulphides and thus be a source of the observed sulphur. The lignin was thus ion-exchanged to remove any calcium. To further investigate how the sulphur content in lignin can be decreased, two different types of reactions were performed on lignin; oxidation and reduction. The oxidation reactions were made in sodium hydroxide with oxygen at different temperatures and time on both original and water-extracted lignin. The reduction reactions were made on water-extracted lignin with Raney nickel in three different solvent systems: methanol: water, acetone: water and sodium hydroxide.

 

The original lignin contained 2.6% sulphur as determined by ICP. Washing lowered the content to 1.85% sulphur. By n-pentane extraction the elemental sulphur was lowered to a level of 1.82% sulphur, which was considered to be organically bound sulphur. Neither the ion exchange nor the oxidation lowered the sulphur content significantly.

 

The reduction reactions successfully the organically bound sulphur from 1.82% to a level of 0.54%.

 

The relative distribution of the sulphur content in the studied softwood lignin was as follows: about 29% as inorganic sulphur, about 1% as elemental sulphur and approximately 70% as organically bound sulphur, of which 49% could be removed by Raney nickel.

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Cambron, André. "Hydrogen in NiZr metallic glasses." Thesis, McGill University, 1986. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=66070.

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Norwood, Carolyn G. "The Effect of Nickel Content on the Mechanical Properties and Microstructure of a High Toughness Secondary Hardening Steel." Research Showcase @ CMU, 2016. http://repository.cmu.edu/dissertations/1049.

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Certain structural applications require materials to possess both high strength and high toughness, two properties which can often be inversely related with one increasing at the expense of the other. Currently, only two classes of steels exist that fulfill both of these application-critical criteria – maraging steels and some cobaltcontaining secondary hardening steels. Unfortunately, these alloys are expensive due to their high cobalt and nickel contents. It is thought that in these alloys nickel offsets the detrimental effects cobalt can have on the ductile-to-brittle transformation and that by removing cobalt, an inexpensive steel alternative with comparable mechanical properties to the currently available alloys could be developed. This research examines the effect of nickel additions to a base secondary hardening steel on mechanical properties and microstructure. The work was divided into separate studies in which five experimental alloys with differing nickel amounts were examined in order to determine the effect of nickel on the strength, ductile-to-brittle transition temperature (DBTT), and room temperature fracture toughness. In the first study, the effect of nickel on strength was investigated. Increasing nickel content generally increased strength, although the effect of nickel on yield strength and ultimate tensile strength was highly dependent on the quench rate from the austenitizing temperature. Results indicate that fine precipitates of VC and Mo2C contribute to the strength of these alloys. The second study looked at the effect of nickel on the DBTT. Test specimens were heat treated uniformly and then Charpy impact energies were determined for five test temperatures. The DBTT decreased approximately 200°C when nickel content was increased from 0 to 5 and 6 wt.%. Heat treatment did not have a significant effect on the DBTT. Results of testing for the nickel-free alloys suggest that rare-earth inclusions are slightly more effective in promoting quasi-cleavage than calcium or aluminum oxide inclusions. The DBTT was primarily controlled by nickel content, as the effects of prior austenite grain size and retained austenite content were negligible. In the third and last study, the effect of nickel on room temperature toughness was analyzed. Fracture toughness increased with increasing nickel content and tempering temperature. The experimental alloys with zero nickel additions had unexpectedly low toughness compared to previous work in heats with nearly identical composition. This was determined to be the result of the large inclusions in these steels which promote quasi-cleavage fracture in the absence of nickel. In addition, the difference in toughness between the two experimental base heats could be due to the low coefficient of thermal expansion of rare-earth inclusions, which could increase tensile circumferential stresses that promote quasi-cleavage. Examination of KIC fracture surfaces revealed no correlation between average area fraction of secondary voids and fracture toughness.
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Hamdani, Fethi. "Improvement of the corrosion and oxidation resistance of Ni-based alloys by optimizing the chromium content." Thesis, Lyon, INSA, 2015. http://www.theses.fr/2015ISAL0012/document.

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Cette étude fondamentale est dédiée à la compréhension de l’influence de la composition chimique, notamment la teneur en chrome, des alliages base de nickel sur leur mécanismes de corrosion et d’oxydation. La corrosion sous contrainte intergranular (CSCIG) est un mode de dégradation qui affecte de nombreux alliages au sein des réacteurs à eau pressurisé. En particulier, les alliages base nickel tubes des générateur de vapeur (GV). La sensibilité à la CSC est désormais dépend de la teneur en chrome, ce qui a conduit au remplacement de l’alliage 600 (Ni-16Cr-9Fe) par l’alliage 690 (Ni-30Cr-9Fe). Cependant le bon comportement de l’alliage 690 en termes de résistance à la corrosion restes mal défini. L’objective de cette thèse est double : i) déterminer l’effet de la teneur en chrome, ii) contribuer à la compréhension de l’effet de fer étant un élément d’addition sur la résistance à la corrosion et l’oxydation généralisée des alliages base nickel en milieu primaire assimilé et en vapeur surchauffée à 700°C. Par ailleurs, des analyses électrochimiques pertinentes dans la température ambiante ont été mené afin d’établir une corrélation entre les propriétés physiques de film passive susceptible de protéger le matériau et de la teneur en chrome. Des alliages modèles binaires Ni-Cr, à teneur de chrome varie entre 14 et 30 % en poids, des alliages ternaires Ni-Cr-8Fe et l’alliage 600 ont été étudies. L’aspect expérimental de cette étude repose sur des techniques conventionnelles: SEM, STEM, EDX, Potentiodynamique, EIS, Chronoamperometrie, Mott-Schottky. La cinétique d’oxydation en vapeur surchauffée a été déterminée en mesurant l’apport de masse. L’impact de l’état de surface sur le processus de la corrosion et l’oxydation a été mis en évidence. Les polissages miroir et électrochimique ont été réalisés afin de découpler l’effet de l’écrouissage développé en subsurface, induit par la préparation de surface, et la composition chimique de l’alliage. La teneur en chrome limite à partir de laquelle l’alliage a un comportement satisfaisant en corrosion a été déterminé à 20% dans le milieu primaire. Cependant les analyses électrochimiques ont décelé l’existence d’une teneur en chrome optimal à 26%. La cinétique d’oxydation des alliages modèles ainsi que la morphologie des oxydes formés sur ces matériaux dans le milieu vapeur surchauffée ont indiqué l’existence d’une teneur en chrome optimal à 24%. Une dégradation des propriétés des films d’oxydes a été observée en augmentant la teneur en chrome au-dessus de l’optimum. En résumé, ce travail se préoccupe de l’optimisation de la teneur en chrome, méthode plus adéquate, pour l’amélioration de la résistance à la corrosion et l’oxydation des alliages base nickel
This fundamental study is focused on the understanding of the influence of the chemical composition of Ni-based alloys on their corrosion and oxidation mechanisms. This work is not dedicated for a particular application. It is well known for instance that Ni-based alloys are susceptible to intergranular stress corrosion cracking (IGSCC) in primary water. Thus, Alloy600 (Ni-16Cr-9Fe), used in steam generator (SG) tubing, was replaced by higher chromium content material Alloy690 (Ni-30Cr-9Fe). This later shows a better resistance to IGSCC which may be linked to the growth of more protective oxide layer as chromium content is increased to 30 wt.%. The main goal of this study is to investigate: i) the influence of chromium content, ii) impact of iron addition on the corrosion and oxidation resistance of Ni-based alloys in primary water and superheated steam at 700°C. Furthermore, analytical approach in acidic solution is conducted at room temperature. This allowed to establish a relationship between alloying elements and physical properties of the oxide layers. For this purpose, Ni-xCr (14 ≤ x≤ 30 wt.%), Ni-xCr-8Fe (x=14,22 and 30 wt.%) model alloys and industrial material Alloy600 have been studied. To characterize the oxide scales, conventional technics were used: SEM, STEM, EDX, Potentiodynamic, EIS, Chronoamperometry, Mott-Schottky. Furthermore, steam oxidation kinetics was evaluated by means of weight gain measurements. To uncouple the effect of surface cold-work and the chemical composition of the base metal, mirror and electro polishing were carried out. In primary water, critical chromium content (20 wt.%), which corresponds to the minimum amount of chromium required to the transition from non-protective to protective and compact Cr-oxide layer, is determined. However, the analytical approach, using electrochemical technics, at room temperature elucidated the existence of optimum chromium content (26 wt.%) in terms of corrosion resistance. In superheat steam, oxidation kinetics and oxide scale characteristics showed the existence of optimum chromium content (24 wt.%) in terms of oxidation resistance. The corrosion and oxidation resistance is degraded as chromium content was increased more than optimal amount. Iron addition (8 wt.%) had a detrimental effect on the protectivess of the resulting oxide scales. Finally, this study showed that optimizing of chromium content is more appropriate method for enhancing corrosion and oxidation resistance, that increasing chromium content to high level is not necessary beneficial to those parameters. This work provides a useful knowledge to design new alternative materials. For this purpose, more investigations should be conducted to test other parameters such as: weldability, fabricability, thermal conductivity,etc
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Muteba, Itone. "Research on nickel alloy sensitivity." Title page, Contents and Abstract only, 1999. http://web4.library.adelaide.edu.au/theses/09DM/09dmm992.pdf.

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"April 1999." Includes bibliographical references (leaves 46-51). Aims to collect information about the numbers of dental workers who are sensitive or allergic to nickel and to help identify signs which might predict those people who are most likely to be sensitive to nickel. Uses a standard patch test to identify sensitive subjects.
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Gentry, Retha D., Lisa Ousley, and Candice N. Short. "Nickel Allergic Contact Dermatitis: A Case Report." Digital Commons @ East Tennessee State University, 2017. https://dc.etsu.edu/etsu-works/7159.

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A 22-year-old male college student presented to primary care with a pruritic rash on his mid abdomen for the past 2 weeks. He reported mild to moderate pruritus and had been scratching the area above his belt buckle.
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Zhang, Xin. "Procédé hydrométallurgique pour la valorisation du nickel contenu dans les plantes hyperaccumulatrices." Thesis, Université de Lorraine, 2014. http://www.theses.fr/2014LORR0172/document.

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Certaines plantes, dites hyperaccumulatrices, ont la capacité de se développer sur des sols riches en métaux et d’accumuler ces métaux à des concentrations élevées. L’incinération de la biomasse produit des cendres qui contiennent de 10 à 25% en masse de Ni. Ce travail s’inscrit dans la continuité d’une recherche menée par l’équipe depuis plusieurs années, qui a donné lieu notamment à un brevet sur la production du sel double sulfate de nickel et d’ammonium hexahydraté (ANSH) à partir de la biomasse d’Alyssum murale. Le manuscrit comprend d’abord une synthèse bibliographique sur la phytomine, allant des hyperaccumulateurs aux procédés de valorisation, essentiellement centrée sur le nickel. Ensuite, ont été comparées quinze plantes hyperaccumulatrices (des genres Alyssum, Leptoplax et Bornmuellera) provenant d’Albanie ou de Grèce, en vue de leur application pour la phytomine. Les teneurs en nickel ont été mesurées dans les différents organes des plantes et dans les cendres obtenues par combustion. Les trois genres ont de l’intérêt pour l’application, les plantes contiennent 1 à 3% en masse de nickel et les cendres 15 à 20 %. Le procédé hydrométallurgique de production d’ANSH a été étudié étape par étape en vue d’optimiser chaque étape pour produire un sel très pur tout en économisant matière et énergie et minimisant la production d’effluents et de déchets. Ce travail a conduit à l’amélioration du procédé de départ. Enfin, de nouvelles pistes ont été proposées pour conduire à de nouveaux procédés et produits du nickel. Les résultats obtenus et la dynamique actuelle autour de la phytomine montrent l’intérêt de cette approche et annoncent son développement imminent
Some plants, known as hyperaccumulators, are able to develop on metal containing soils and to accumulate these metals at high concentrations in shoots. Biomass incineration leads to ash containing 10 to 25 wt % nickels, greater than in some mineral ores. This work follows a research that has been carried out by the team for several years, which has resulted in a patent on the hydrometallurgical production of the double salt ammonium and nickel hexahydrate (ANSH) from the biomass of Alyssum murale. It aims at improving the synthesis method of this salt in order to upscale it at the pilot scale and explore new methods leading to new products. The manuscript begins with a bibliographic review on phytomining from hyperaccumulators to metal recycling processes, essentially focused on nickel. Then ca 15 hyperaccumulator plants (genus Alyssum, Leptoplax and Bornmuellera) collected in Greece or Albania have been compared, in the objective of phytomining. Nickel concentrations were measured in the plant organs and in the ashes after combustion. The three types of plants are of great interest for the technology, they contain 1 to 3 wt % of nickel and the ashes 15 to 20%. The hydrometallurgical process of ANSH production was investigated step by step to optimize each step to produce a salt of high purity, to decrease materials and energy consumption and to minimize effluent and waste production. The process was thus improved. Eventually, new ideas have been tested for new processes and nickel products. The obtained results and the current dynamics prove the interest of phytomining and announce its imminent development
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Le, Ngoc Michel. "Les effets allergiques et toxiques du nickel." Paris 5, 1997. http://www.theses.fr/1997PA05P094.

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Books on the topic "Nickel content"

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Greulich, Peter. Schwermetalle in Fichten und Böden im Burgwald (Hessen): Untersuchungen zur räumlichen Variabilität der Elemente Blei, Cadmium, Nickel, Zink, Calcium und Magnesium, unter besonderer Berücksichtigung des Reliefeinflusses. Marburg/Lahn: Im Selbtsverlag der Marburger Geographischen Gesellschaft, 1988.

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Negusanti, J. J. Studies of the terrestrial environment in the Sudbury Area 1978-1987. Toronto: Ministry of the Environment, 1990.

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Fatemi, Navid S. The achievement of low contact resistance to indium phosphide: The roles of Ni, Au, Ge, and combinations thereof. [Washington, DC: National Aeronautics and Space Administration, 1992.

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Strong, Despina. Vanadium and nickel complexes in the Alberta oil sands. 1986.

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Center, Lewis Research, ed. A study of reduced chromium content in a nickel-base superalloy via element substitution and rapid solidification processing. [Cleveland, Ohio]: National Aeronautics and Space Administration, 1987.

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I, Maibach Howard, and Menné Torkil, eds. Nickel and the skin: Immunology and toxicology. Boca Raton, Fla: CRC Press, 1989.

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(Editor), Jurij J. Hostynek, and Howard I. Maibach (Editor), eds. Nickel and the Skin: Absorption, Immunology, Epidemiology, and Metallurgy (Dermatology, Clinical and Basic Science). Informa Healthcare, 2002.

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Hass, Christine C., and Jerry W. Dragoo. Competition and coexistence in sympatric skunks. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198759805.003.0024.

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Ecological niches of three species of skunks (Mephitidae: Conepatus leuconotus, Mephitis mephitis, M. macroura) in and near their overlap zone in the American Southwest were studied to determine if competition may be limiting distribution of these species. A species distribution model developed in MaxEnt was used to identify suitable habitat for each species, from which contact zones for each species pair were identified. Principal components derived from habitat and climate variables inside and outside of contact zones for each species, and between species pairs within the contact zone were then compared. Species differed in environmental space inside and outside of contact zones, but species pairs did not differ within contact zones, indicating no evidence of competitive exclusion, and possible niche convergence at a broad spatial scale
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Lampert, William V. A study of aluminum-germanium-nickel ohmic contact metallurgical effects at the gallium arsenide interface. 1992.

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Kazuhisa, Miyoshi, and United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch., eds. Humidity effects on adhesion of nickel-zinc ferrite in elastic contact with magnetic tape and itself. [Washington, D.C.]: National Aeronautics and Space Administration, Scientific and Technical Information Branch, 1985.

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Book chapters on the topic "Nickel content"

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Peters, K., B. Gammelgaard, and T. Menné. "Nickel Content of Human Fingernails as a Measure of Occupational Exposure to Nickel." In Current Topics in Contact Dermatitis, 565–67. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-74299-6_111.

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Gyôri, Z., J. Prokisch, B. Kovács, and P. Dániel. "Effect of fertilization and irrigation on the nickel content of peas and soybeans." In Fertilizers and Environment, 495–98. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-1586-2_86.

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Frank, Richard B., Christopher G. Roberts, and Jingxian Zhang. "Effect of Nickel Content on Delta Solvus Temperature and Mechanical Properties of Alloy 718." In Superalloy 718 and Derivatives, 724–36. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118495223.ch56.

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Vaillant, François, Jean-Denis Mithieux, Odile de Bouvier, Dominique Vançon, Guy Zacharie, Yves Brechet, and François Louchet. "Influence of Chromium Content and Microstructure on Creep and PWSCC Resistance of Nickel Base Alloys." In Ninth International Symposium on Environmental Degradation of Materials in Nuclear Power Systems-Water Reactors, 251–60. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118787618.ch26.

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Huang, Shuming, Jilai Xue, and Zengie Wang. "Effect of FeO Content in Laterite Nickel Slag on the Corrosion Behaviour of Refractory Materials." In The Minerals, Metals & Materials Series, 679–88. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-51340-9_66.

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Efsing, Pål, Jenny Roudén, and Per Nilsson. "Flux Effects on Radiation Induced Aging Behaviour of Low Alloy Steel Weld Material with High Nickel and Manganese Content." In Effects of Radiation on Nuclear Materials: 26th Volume, 119–34. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 2014. http://dx.doi.org/10.1520/stp157220130112.

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Iglesias-Souto, Javier. "Nickel Contact Dermatitis." In Encyclopedia of Medical Immunology, 508–13. New York, NY: Springer New York, 2014. http://dx.doi.org/10.1007/978-1-4614-9194-1_447.

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Lv, Xuewei, Cheng Pan, Chenguang Bai, Guibao Qiu, and Meilong Hu. "Effect of MgO Content on Melting Features and Viscosity of SiO2-CaO-MgO-Al2O3-FeO Slag in Nickel Laterite Metallurgy." In 3rd International Symposium on High-Temperature Metallurgical Processing, 197–201. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118364987.ch24.

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Kalimo, K., and K. Lammintausta. "Nickel Bioavailability from Patch Tests: Comparison Between Nickel Sulphate and Nickel Chloride Using TRUE Test." In Current Topics in Contact Dermatitis, 540–43. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-74299-6_106.

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Li, Qing, Cheng Bo Xiao, Jin Xia Song, Ding Gang Wang, and Ya Fang Han. "Effect of Ta on the Oxidation Resistance of a Cast Nickel-Base Die Material with Low Cr and High W Content." In Materials Science Forum, 669–72. Stafa: Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-960-1.669.

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Conference papers on the topic "Nickel content"

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Mayangsari, W., A. B. Prasetyo, and Puguh Prasetiyo. "Upgrading nickel content of limonite nickel ore through pelletization, selective reduction and magnetic separation." In PROCEEDINGS OF THE 3RD INTERNATIONAL CONFERENCE ON MATERIALS AND METALLURGICAL ENGINEERING AND TECHNOLOGY (ICOMMET 2017) : Advancing Innovation in Materials Science, Technology and Applications for Sustainable Future. Author(s), 2018. http://dx.doi.org/10.1063/1.5030243.

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Brar, Charanjot, William Davis, Eric Mann, Clifford Ridley, Brenton Wirachowsky, Chary Rangacharyulu, David Guzonas, and Laurence Leung. "Gen IV SCWR cladding analysis project: Nickel content in SCWR cladding material." In 2015 5th International Youth Conference on Energy (IYCE). IEEE, 2015. http://dx.doi.org/10.1109/iyce.2015.7180743.

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Zheng, Y., S. Li, L. Zheng, and Y. Han. "Abnormal Phases in High W Content Nickel Base Superalloys and Phase Control." In Superalloys. TMS, 2004. http://dx.doi.org/10.7449/2004/superalloys_2004_743_751.

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Caldwell, E. C., F. J. Fela, and G. E. Fuchs. "Segregation of Elements in High Refactory Content Single Crystal Nickel Based Superalloys." In Superalloys. TMS, 2004. http://dx.doi.org/10.7449/2004/superalloys_2004_811_818.

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Huang, Pin-Chiun, Hsoung-Wei Chou, and Yuh-Ming Ferng. "Effects of Chemical Content Variation on the Fracture Probability of PWR Pressure Vessel Subjected to PTS Events." In ASME 2015 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/pvp2015-45230.

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This paper is to study the effects of copper and nickel content variations on the fracture probability of the pressurized water reactor (PWR) pressure vessel subjected to pressurized-thermal-shock (PTS) transients. The probabilistic fracture mechanics (PFM) code, FAVOR, which was developed by the Oak Ridge National Laboratory in the United States, is employed to perform the analyses. A Taiwan domestic PWR pressure vessel with varied copper and nickel contents of beltline region welds and plates is investigated in the study. Some PTS transients analyzed from Beaver Valley Unit 1 for establishing the USNRC’s new PTS rule are applied as the loading conditions. It is found that the content variation of copper and nickel will significantly affect the radiation embrittlement and the fracture probability of PWR pressure vessels. The results can be regarded as the risk incremental factors for comparison with the safety regulation requirements on vessel degradation as well as a reference for the operation of PWR plants in Taiwan.
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Yoshida, Kiyoshi, Koichiro Sawa, Kenji Suzuki, and Kouetsu Takaya. "Influence of nickel content on various characteristics of AgNi contacts for electromagnetic contactors." In 2014 IEEE 60th Holm Conference on Electrical Contacts (Holm). IEEE, 2014. http://dx.doi.org/10.1109/holm.2014.7031053.

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Zheng, Y., X. Wang, J. Dong, Y. Han, H. Marakami, and H. Harada. "Effect of RU Addition on Cast Nickel Base Superalloy with Low Content of CR and High Content of W." In Superalloys. TMS, 2000. http://dx.doi.org/10.7449/2000/superalloys_2000_305_311.

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Frank, R., C. Roberts, and J. Zhang. "Effect of Nickel Content on Delta Solvus Temperature and Mechanical Properties of Alloy 718." In Superalloys. John Wiley & Sons, Inc., 2010. http://dx.doi.org/10.7449/2010/superalloys_2010_725_736.

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Che, F. X., J. E. Luan, and Xavier Baraton. "Effect of silver content and nickel dopant on mechanical properties of Sn-Ag-based solders." In 2008 58th Electronic Components and Technology Conference (ECTC 2008). IEEE, 2008. http://dx.doi.org/10.1109/ectc.2008.4550016.

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Akhtar, Muhammad Shahrukh, Zhonglie An, Masaya Toda, and Takahito Ono. "Electrodeposition and characterization of nickel-carbon nanotube composite thin films with high carbon nanotube content." In 2016 IEEE 16th International Conference on Nanotechnology (IEEE-NANO). IEEE, 2016. http://dx.doi.org/10.1109/nano.2016.7751464.

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Reports on the topic "Nickel content"

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Muroga, T., N. Yoshida, and F. A. Garner. The influence of nickel content on microstructures of Fe-Cr-Ni austenitic alloys irradiated with nickel ions. Office of Scientific and Technical Information (OSTI), November 1990. http://dx.doi.org/10.2172/6337067.

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Singh, B. N., F. A. Garner, D. J. Edwards, and J. H. Evans. Influence of nickel and beryllium content on swelling behavior of copper irradiated with fast neutrons. Office of Scientific and Technical Information (OSTI), October 1996. http://dx.doi.org/10.2172/414879.

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Garner, F. A., B. M. Oliver, and L. R. Greenwood. The dependence of helium generation rate on nickel content of Fe-Cr-Ni alloys irradiated at high dpa levels in fast reactors. Office of Scientific and Technical Information (OSTI), April 1997. http://dx.doi.org/10.2172/543304.

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Welter, Taya. Niche Television Content. Portland State University Library, January 2016. http://dx.doi.org/10.15760/honors.246.

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S.A. Attanasio, D.S. Morton, M.A. Ando, N.F. Panayotou, and C.D. Thompson. Measurement of the Nickel/Nickel Oxide Phase Transition in High Temperature Hydrogenated Water Using the Contact Electric Resistance (CER) Technique. Office of Scientific and Technical Information (OSTI), May 2001. http://dx.doi.org/10.2172/821680.

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