Relevant bibliographies by topics / Serpentine

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
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Academic literature on the topic 'Serpentine'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 August 2024

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Journal articles on the topic "Serpentine"

1

Mayhew, Lisa E., and Eric T. Ellison. "A synthesis and meta-analysis of the Fe chemistry of serpentinites and serpentine minerals." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 378, no. 2165 (January 6, 2020): 20180420. http://dx.doi.org/10.1098/rsta.2018.0420.

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The iron chemistry of serpentinites and serpentine group minerals is often invoked as a record of the setting and conditions of serpentinization because Fe behaviour is influenced by reaction conditions. Iron can be partitioned into a variety of secondary mineral phases and undergo variable extents of oxidation and/or reduction during serpentinization. This behaviour influences geophysical, geochemical and biological aspects of serpentinizing systems and, more broadly, earth systems. Iron chemistry of serpentinites and serpentines is frequently analysed and reported for single systems. Interpretations of the controls on, and the implications of, Fe behaviour drawn from a single system are often widely extrapolated. There is a wealth of serpentinite/serpentine chemical composition data available in the literature. Consequently, compilation of a database including potential predictors of Fe behaviour and measures of Fe chemistry enables systematic investigation of trends in Fe behaviour across a variety of systems and conditions. The database presented here contains approximately 2000 individual data points including both bulk rock and serpentine mineral geochemical data which are paired whenever possible. Measures of total Fe and Fe oxidation state, which are more limited, are compiled with characteristics of the systems from which they were sampled. Observations of trends in Fe chemistry in serpentinites and serpentines across the variety of geologic systems and parameters will aid in verifying and strengthening interpretations made on the basis of Fe chemistry. This article is part of a discussion meeting issue ‘Serpentinite in the Earth system’.
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Shiba, Masayuki, Tomoki Tate, and Tatsuya Fukuda. "Adaptative Leaf Morphology of Eurya japonica Thunb. (Ternstroemiaceae) in Serpentine Areas." Journal of Plant Studies 11, no. 1 (January 25, 2022): 10. http://dx.doi.org/10.5539/jps.v11n1p10.

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Serpentine soils are known to affect plant growth and plants in these soils have morphological and anatomical modifications. Comparative leaf morphology and anatomy studies of Eurya japonica Thunb. was conducted between serpentine and inland (control) areas. Our morphological analyses revealed that the individuals in the serpentine areas had significantly smaller and thicker leaves than those in the inland areas. Our anatomical analyses showed that the smaller leaves of serpentines had decreased numbers of cells, and their thicker leaves contributed to the increased height of epidermal cells, palisade tissue, and spongy tissue. Furthermore, the stomatal size of serpentines was significantly smaller than those from the inland areas. We concluded that E. japonica adapted to the serpentine areas by decreasing leaf size due to low levels of nutrients, by thickening the leaves to store water and reducing the stomatal size to minimize water loss via gas exchange.
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Pavlova, Dolja. "Effect of nickel on pollen germination and pollen tube length in Arabis alpina (Brassicaceae)." Australian Journal of Botany 64, no. 4 (2016): 302. http://dx.doi.org/10.1071/bt15291.

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In this work we studied and compared the toxic effect of nickel (Ni) on pollen germination and pollen tube length in Arabis alpina L. collected from serpentine and non-serpentine populations distributed in the Rila mountains, Bulgaria. Pollen grains were treated with prepared standard solutions of 100, 300, 500, and 700 μM Ni as NiCl2 in distilled water. A nutritional medium was also used to assess pollen germination. Nickel inhibited pollen germination and pollen tube elongation in both serpentine and non-serpentine plants. The percentage of germinated pollen in serpentine plants treated with Ni was higher than in non-serpentine plants but there was no difference in pollen tube elongation between groups. However, pollen tubes showed abnormalities such as coiling and swelling of the tip, or burst, and varied considerably among the samples. A complete break of pollen tube elongation is due to such abnormalities. Also, decreased pollen fertility in both populations was found. The plants from serpentines were less sensitive to (i.e. more tolerant of) elevated Ni concentrations commonly found in serpentine soils.
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Mohsin Mohammed Ghazal, Abdulsalam Mahdi Salih, and Abdulhadi Hamad Mohammed. "Serpentinite Rocks of Mawat Ophiolite Complex, Northeastern Iraq, Beetwat Village: 1-Petrography and Diffractometry." Tikrit Journal of Pure Science 23, no. 7 (January 26, 2023): 71–77. http://dx.doi.org/10.25130/tjps.v23i7.699.

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The Mawat ophiolite complex is of Cretaceous period as a residue of oceanic crust covers about 200 km2, Northeastern Iraq.. The serpentinite rocks are exposed as a diapir in the northeastern suture Zagros zone of Iraq near Beetwat village, The field study and petrography reveal two types of serpentinite, the shear and massive, with three serpentine varieties. The serpentinite rocks are affected by secondary processes such as diagenesis, metamorphism and hydrothermal alteration in different degrees. Some common Textures in these rocks are pseudomorphic such as mesh or sieve textures, glass hour and bastite texture. Nonpsedomorphic textures appear also in these rocks such as interpenetrating fibrous, interlocking textures. Mineralogically, the massive serpentine minerals are lizardite and chrysotile that affected by recrystalization and replacement of lizardite. The (XRD) analysis explain that the serpentine is composed of lizardite, chrysotile, antigorite, in addition to amphibole minerals (anthophyllite and tremolite), chlorite talc, and opaque minerals as chromite.
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Wang, Yongbin, Jun Peng, Shuang Liu, Guoping Luo, Fang Zhang, and Shengli An. "Effects of Magnesium Mineral on the Reduction and Expansion Performances of Baiyun Ebo Iron Pellets." Metals 14, no. 1 (January 18, 2024): 116. http://dx.doi.org/10.3390/met14010116.

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Pellet ore is an important raw material for blast furnace ironmaking, and its reduction and expansion performance directly affects the smooth operation and smelting indicators of the blast furnace. This paper quantitatively studied the effects of magnesium minerals such as dolomite and serpentinite on the pellet-forming performance, the microstructure after roasting, compressive strength, and the reduction expansion performance of Baiyun Ebo iron concentrate. The optimal ratio of dolomite and serpentinite to add was determined when preparing pellets using Baiyun Ebo iron concentrate powder. The results showed that the drop strength and compressive strength of the green pellet after adding serpentine were relatively higher than those after adding dolomite, indicating that controlling the MgO content in the green pellet at 2.5% using serpentine was beneficial for improving the drop strength and compressive strength. Under the condition of adding dolomite, when the MgO content was 2.5%, the compressive strength of the roasted pellet was the highest, which was 2192.6 N, and the volume expansion rate was 12.32%. Under the condition of adding serpentine, when the MgO content was 2.5%, the compressive strength of the roasted pellet was 2622.2 N, and the volume expansion rate was 9.71%. Compared with dolomite as a magnesium additive, when the reduction expansion rate of Baiyun Ebo iron concentrate was controlled within 20%, serpentine only needed to have a MgO content of about 1.5% in the pellets, while dolomite needed to have a MgO content of about 2.5%. Therefore, under the condition that the MgO contents of dolomite and serpentine were equivalent, the amount of serpentine used was lower.
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Picazo, Suzanne, Benjamin Malvoisin, Lukas Baumgartner, and Anne-Sophie Bouvier. "Low Temperature Serpentinite Replacement by Carbonates during Seawater Influx in the Newfoundland Margin." Minerals 10, no. 2 (February 18, 2020): 184. http://dx.doi.org/10.3390/min10020184.

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Serpentinite replacement by carbonates in the seafloor is one of the main carbonation processes in nature providing insights into the mechanisms of CO2 sequestration; however, the onset of this process and the conditions for the reaction to occur are not yet fully understood. Preserved serpentine rim with pseudomorphs of carbonate after serpentine and lobate-shaped carbonate grains are key structural features for replacement of serpentinite by carbonates. Cathodoluminescence microscopy reveals that Ca-rich carbonate precipitation in serpentinite is associated with a sequential assimilation of Mn. Homogeneous δ18O values at the µm-scale within grains and host sample indicate low formation temperature (<20 °C) from carbonation initiation, with a high fluid to rock ratio. δ13C (1–3 ± 1‰) sit within the measured values for hydrothermal systems (−3–3‰), with no systematic correlation with the Mn content. δ13C values reflect the inorganic carbon dominance and the seawater source of CO2 for carbonate. Thermodynamic modeling of fluid/rock interaction during seawater transport in serpentine predicts Ca-rich carbonate production, at the expense of serpentine, only at temperatures below 50 °C during seawater influx. Mg-rich carbonates can also be produced when using a model of fluid discharge, but at significantly higher temperatures (150 °C). This has major implications for the setting of carbonation in present-day and in fossil margins.
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Mellini, Marcello. "Chrysotile and polygonal serpentine from the Balangero serpentinite." Mineralogical Magazine 50, no. 356 (June 1986): 301–5. http://dx.doi.org/10.1180/minmag.1986.050.356.17.

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AbstractTransmission electron microscopy shows that normal chrysotile and polygonal serpentine occur together and in parallel association with balangeroite, within the slip-veins of the Balangero serpentinite. Chrysotile substitutes for balangeroite and it is later replaced by the polygonal serpentine.The chrysotile fibres are packed together according to a rod close-packing scheme, with defects. Lattice images of the polygonal serpentine confirm the structure model proposed by Middleton and Whittaker (1976), consisting of polygonally arranged fiat layers. This structural type is probably common for serpentine minerals and constitutes a fourth main type of layer configuration in 1:1 layer silicates.
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Hegde, Dileep, Sunith Mahantheshappa, Jayarama Reddy, and Praveen Kumar Nagadesi. "Soil Microflora in Rhizosphere of Barringtonia racemosa (L.) Spreng and Rauwolfia serpentina (L.) Benth. ex Kurz from Western Ghats region of Uttara Kannada. Karnataka, India." Saudi Journal of Pathology and Microbiology 7, no. 7 (July 5, 2022): 254. http://dx.doi.org/10.36348/sjpm.2022.v07i07.001.

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A study was conducted for the isolation and identification of soil micro-flora in rhizosphere of B. racemosa (L.) Spreng and R. serpentine (L.) Benth. ex Kurz, trees from Western Ghats region of Uttar Kannada, Karnataka, India. Soil samples were collected from rhizosphere of B. racemosa and R. serpentine plants, during the months of February 2022. Soil microbes were isolated by using soil dilution technique. The total number of bacteria isolated from B. racemose and R. serpentinais rhizosphere is 2,666,600 and 4,461,160 per gram of soil respectively. The rhizospheric fungal isolates present in B. racemosa and R. serpentina plants is 3,281,200 and 1,946,200 per gram of soil respectively. In B. racemosa rhizosphere, the percentage contribution is Penicillium sp with 13.679%, In R. serpentine rhizosphere, the highest percentage contribution is Cladosporium sp., Trichoderma sp.with17.663% and 17.391% respectively. In rhizosphere of B. racemose, 19 different species belonging to 15 genera were isolated; among which Penicillium species is dominating over other fungal species isolated. In rhizosphere of R. serpentina, 18 different species belonging to 11 genera were observed; among which Trichoderma sp.is dominating over other fugal species isolates. The most frequently isolated fungi from the rhizosperes of B. racemosa and R. serpentine plants are Penicillium sp and Trichoderma sp.For the first time the rhizospheric micro-flora i.e., bacteria and fungi was reported from B. racemose soil sample collected from Western Ghats region of Uttara Kannada. For the first time the rhizospheric myco-flora was reported from R. serpentine soil samples collected from Western Ghats region of Uttara Kannada. All the bacteria and fungi isolated was new report to Wester Ghats region of Uttar Kannada, Karnataka, India.
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Boschi, Chiara, Federica Bedini, Ilaria Baneschi, Andrea Rielli, Lukas Baumgartner, Natale Perchiazzi, Alexey Ulyanov, Giovanni Zanchetta, and Andrea Dini. "Spontaneous Serpentine Carbonation Controlled by Underground Dynamic Microclimate at the Montecastelli Copper Mine, Italy." Minerals 10, no. 1 (December 18, 2019): 1. http://dx.doi.org/10.3390/min10010001.

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Understanding low temperature carbon sequestration through serpentinite–H2O–CO2 interaction is becoming increasingly important as it is considered a potential approach for carbon storage required to offset anthropogenic CO2 emissions. In this study, we present new insights into spontaneous CO2 mineral sequestration through the formation of hydromagnesite + kerolite with minor aragonite incrustations on serpentinite walls of the Montecastelli copper mine located in Southern Tuscany, Italy. On the basis of field, petrological, and geochemical observations coupled with geochemical modeling, we show that precipitation of the wall coating paragenesis is driven by a sequential evaporation and condensation process starting from meteoric waters which emerge from fractures into the mine walls and ceiling. A direct precipitation of the coating paragenesis is not compatible with the chemical composition of the mine water. Instead, geochemical modeling shows that its formation can be explained through evaporation of mine water and its progressive condensation onto the mine walls, where a layer of serpentinite powder was accumulated during the excavation of the mine adits. Condensed water produces a homogeneous film on the mine walls where it can interact with the serpentinite powder and become enriched in Mg, Si, and minor Ca, which are necessary for the precipitation of the observed coating paragenesis. The evaporation and condensation processes are driven by changes in the air flow inside the mine, which in turns are driven by seasonal changes of the outside temperature. The presence of “kerolite”, a Mg-silicate, is indicative of the dissolution of Si-rich minerals, such as serpentine, through the water–powder interaction on the mine walls at low temperature (~17.0 to 18.1 °C). The spontaneous carbonation of serpentine at low temperature is a peculiar feature of this occurrence, which has only rarely been observed in ultramafic outcrops exposed on the Earth’s surface, where instead hydromagnesite predominantly forms through the dissolution of brucite. The high reactivity of serpentine observed, in this study, is most likely due to the presence of fine-grained serpentine fines in the mine walls. Further study of the peculiar conditions of underground environments hosted in Mg-rich lithologies, such as that of the Montecastelli Copper mine, can lead to a better understanding of the physical and chemical conditions necessary to enhance serpentine carbonation at ambient temperature.
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Wicks, Fred J. "Status of the reference X-ray powder-diffraction patterns for the serpentine minerals in the PDF database—1997." Powder Diffraction 15, no. 1 (March 2000): 42–50. http://dx.doi.org/10.1017/s0885715600010824.

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A critical examination of the reference X-ray powder-diffraction patterns of the serpentine minerals in the Powder-Diffraction File (PDF) database has revealed an unsettling situation. Most of the patterns in, or previously in, the PDF database are inaccurate, misidentified, or of poor quality. The PDF database is not a dependable tool for identifying the serpentine minerals, and has not been since the mid-1960s. This has serious implications for studies on serpentine minerals that have depended on the PDF database, particularly those by nonmineralogists doing health and environmental studies of chrysotile asbestos. In the current PDF database, lizardite-1T, carlosturanite, some amesite, and possibly some antigorite (but with inappropriate polytype symbols) can be identified. Only one of the many multilayer lizardites can be identified. The current pattern for chrysotile-2Mc1 (clinochrysotile) is of reasonable quality, but not the best, however the earlier patterns still in the database are so problematic that any chrysotile-2Mc1 identification must be considered suspect. Chrysotile-2Oc1 (orthochrysotile), and any mixture of serpentines cannot be identified using the PDF database. Until the reference serpentine patterns are corrected the PDF database cannot be considered a reliable identification tool. High-quality powder-diffraction patterns of the serpentine minerals have been published and can be rapidly introduced into the PDF database.© 2000 International Centre for Diffraction Data.
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Dissertations / Theses on the topic "Serpentine"

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Mann, Jason Peter. "Serpentine Activation for CO2 Sequestration." Thesis, The University of Sydney, 2014. http://hdl.handle.net/2123/12054.

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Serpentinite calcination currently represents a key step for its activation within ex situ aqueous mineral carbonation. However, the dehydroxylation kinetics that govern this process remain largely unresolved within literature. Available Arrhenius parameters (i.e. A and E) span a wide range of values and appear correlated in terms of a kinetic compensation effect (i.e. linear relationship between loge(A) and E). Following this observation, a revised model for dehydroxylation is presented, validated against a systematic investigation into the role of particle size on the dehydroxylation rate for both South West Oregon and New England Australia Serpentinite using non-isothermal TGA. Within these experiments, dehydroxylation occurs primarily through a particle size dependent mechanism, best described by the canonical spherical, retreating interface model (R3), with statistically equivalent Arrhenius parameters reported between specimens. Examining the processing side of activation, this thesis additionally explores the role of flash calcination, where dehydroxylation is achieved in extremely short residence times (<2 s) through the use of high temperatures (>1073 K) and rapid heating rates (>104 K/s). High temperatures required by this technique however, led to instant deactivation of the calcine through recrystallisation of the dehydroxylated phase to the high temperature product, forsterite. Investigation into this phase transition indicates magnesium leachability declines proportionally to the extent of forsterite content. Kinetic parameters for this transition are reported, allowing quantification of this deactivation process as a function of calcination temperature, time, and particle size. Closing this thesis, the dissolution of activated serpentinite within the CO2-H2O system is examined at conditions relevant to ex situ mineral carbonation (10 MPa, 423 K), with emphasis on reaction pressure, temperature, and particle size on the magnesium leaching rate.
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Merkulova, Margarita. "Comportement du fer et d'autres ions échangeurs d'électrons en contexte de subduction." Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAU030/document.

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Les zones de subduction sont les plus grands systèmes de recyclage de notre planète. Elles permettent le recyclage de l'eau contenue dans la croûte océanique hydratée et de la lithosphère du manteau supérieur. L'eau joue un rôle clé dans de nombreux processus associés aux zones de subduction, comme la tectonique des plaques, la production de magma, le transport élémentaire et la génération de tremblement de terre. La composition chimique, le contenu H2O de la lithosphère océanique, l'âge et la géométrie de la plaque océanique sont les principaux facteurs contrôlant les processus de subduction, y compris la déshydratation.L'objectif principal de cette thèse est d'étudier le régime de la libération de l'eau depuis la plaque océanique subductante et le comportement du Fe et du S en contenus dans les serpentinites, qui représentent la principale lithologie de roche hydratées océaniques. L'approche expérimentale de ce travail permet d’étudier les changements chimiques et minéralogiques associés lors la déshydratation des serpentinites de différentes compositions. Un certain nombre de techniques d'analyse ont été utilisées pour étudier l’influence de la composition de la roche totale sur la composition des assemblages produits. Les intervalles de pression de température expérimentalement étudiés, à savoir 2 GPa et 450-900C, représentent des zones de subduction chaudes. L'extrapolation à d'autres gradients géothermiques communs a été faite par thermodynamique. Les compositions de serpentinite étudiées correspondent aux péridotites serpentinisées naturelles décrites pour la lithosphère océanique.Mon travail indique que la teneur en Fer contrôle a stabilité thermique d’antigorite. Déshydratation de serpentinites avec Fe, par conséquent, pasee à des températures plus basses par rapport aux assemblages Fe-libres. La déshydratation observée dans les systèmes sans Fer se fait le long d'une réaction univariante, alors que dans les systèmes contenant du Fer, la déshydratation se fait sur un domaine de température (réactions de déshydratation divariantes). De plus, la présence de Al dans serpentinite stabilise clinochlore, qui conserve 15% de l'eau initiale jusqu'à ~ 120 km (820°C/2 GPa) dans subduction chaud. Cette dépendance sur Fe et Al apporte importance de considérer non seulement la géométrie et l'âge de la plaque océanique, mais aussi une composition de lithologies lors de la modélisation et d’interprétation de subduction. Une comparaison entre la profondeur des séismes et la profondeur de déshydratation des serpentinites indique une possible contribution de la libération de l'eau à la sismicité dans les zones de subduction chaudes et à pente faible.La spectroscopie d'absorption des rayons X montre une réduction progressive de Fe et de S dans des serpentinites. Le rapport Fe3+/ Fetotal, de la roche totale, élevé dans la serpentinite, diminue dans les assemblages anhydres de haute température par décomposition de la magnétite (< 550°C) et de l’antigorite (700°C). La pyrite des serpentinites se transforme en pyrrhotite en-dessous de 450°C et induit une libération de ¼ de soufre initial, probablement sous forme de H2S. La magnétite et la pyrite présentes dans des serpentinites, sont des phases cruciales pour la production de fluides très oxydés et d’espèces volatiles soufrées qui peuvent être transportés depuis la plaque subductée vers le coin mantellique. Application des résultats montre que les fluides s’élevant de la plaque océanique sont responsables de l'oxydation du manteau; et décomposition de la magnétite et l’antigorite avec au moins 100°C différence peut provoquer une libération de fluides chimiquement différents à peu profond (basse-T) et profondes (T-élevé) parties de subduction
Subduction zones are the largest recycling systems of our planet. Subduction zones involve recycling of water from hydrated oceanic crust and lithosphere to the upper mantle. Water plays a key role in subduction zone processes, including plate tectonics, magma generation, elemental transport and earthquake generation. The chemical composition, H2O content of oceanic lithosphere sinking to the mantle, age and geometry of subducting oceanic slab are the main factors controlling subduction zone processes including dehydration.The principle aim of this dissertation is to investigate the regime of water release from subducting oceanic plate and the associated behavior of Fe and S in serpentinites, which are the main carriers of water into the slab. The experimental approach of my work allows one to compare chemical and mineral changes occurred during dehydration of serpentinites with different composition. A number of analytical techniques were applied to study the influence of bulk rock composition on the mineral chemistry of produced assemblages. The experimentally investigated pressure-temperature ranges, i.e. 2 GPa and 450-900C, are representative for hot subduction zones. The extrapolation to other common geothermal gradients was done through thermodynamic modeling. The investigated serpentinite compositions correspond to natural serpentinized peridotites described for oceanic lithosphere.Bulk Fe content was demonstrated to decrease thermal stability of antigorite by 25C on average. Dehydration of Fe-bearing serpentinites, consequently, occurs at lower temperatures compared to Fe-free assemblages. Dehydration reactions observed in Fe-free systems are univariant reactions, while in Fe-bearing systems, serpentinites dehydration appears over a range of temperature through divariant reactions. Moreover, the presence of Al in serpentinite stabilized clinochlore, which retains 15% water initial contain in serpentinite down to ~120km (820°C/2 GPa) within hot subduction. Such a dependence of serpentinite dehydration on bulk Fe and Al brings importance of considering not only geometry and the age of the slab, but also a composition of slab lithologies while modeling and interpreting processes in subduction zone. A comparison of the depths of serpentinite dehydration and seismicity revealed a strong correlation and therefore a potential contribution of water release to seismicity in the case of hot subduction zones (i.e., Chili type subduction).X-ray absorption spectroscopy measurements revealed a progressive reduction of Fe and S in investigated serpentinites. The bulk Fe3+/Fetotal ratio initially high in serpentinite is shown to decrease in anhydrous and higher temperature assemblages due to magnetite and Fe3+-bearing antigorite breakdown at <550°C and 700°C, respectively. The presence of pyrite in serpentinite, which transforms to pyrrhotite below 450°C, imposes a release of ¼ of initial sulfur, in H2S form. The presence of magnetite and pyrite in serpentinite, is crucial and responsible for the production of highly oxidized fluids and volatile sulfur species, which can be transported from the subducting slab into the mantle wedge. Application of results, obtained in the present study, to nature demonstrates that fluids rising from subducting slab are responsible for oxidation of overlying mantle, and in addition, magnetite and antigorite breakdown which occurs with at least 100°C difference may cause a release of chemically different fluids at shallow (low-T) and deep (high-T) parts of subduction
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McIntyre, Todd Ian. "Analysis of selected ions in Allium cratericola growing on serpentine and non-serpentine soil." Scholarly Commons, 1991. https://scholarlycommons.pacific.edu/uop_etds/2212.

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The primary problems which plants growing on serpentine soil must overcome are high magnesium concentrations and calcium deficiency. The ability of Allium cratericola to successfully exploit both serpentine and non-serpentine habitats may be due to physiological adaptations which compensate for unusual mineral composition of the soil. Although the Table Mountain soil is described as non serpentine, it bears ionic similarities to the three serpentine soils studied in this investigation. With the advent of modern biochemical techniques in plant physiology, there are ample opportunities to expand on past work concerning plant growth on serpentine soil. Investigations into the biochemical nature of tolerance mechanisms, especially those involving the mechanics of ion transport and translocation, could further elucidate the nature of plant growth on this soil type.
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Can, Semra. "Characterization Of Serpentine Filled Polypropylene." Phd thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/3/12609434/index.pdf.

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ABSTRACT CHARACTERIZATION OF SERPENTINE FILLED POLYPROPYLENE Can, Semra Ph.D., Department of Polymer Science and Technology Supervisor: Prof. Dr. Teoman Tinç
er March 2008, 158 pages In this study, the aim is to prepare polypropylene (PP)/serpentine composites and study their mechanical, thermal and morphological properties. Another objective is to explore whether it is possible to have PP/serpentine nanocomposites with melt intercalation method by using the advantage of the layer silicate structure of serpentine. The most widely used fillers in PP are talc and mica which belong to the phyllosilicates group of silicate minerals. So far, there has been almost no study employing serpentine as filler in either any polymers or PP, although it also belongs to the same group of minerals as talc and mica. Accordingly, it was planned to divide the work into the study of two groups. In group 1, for the compositions with 2, 5, 10 and 20 wt% serpentine, the particulate filler effects of serpentine both alone and in the presence of surface treatments with hydrochloric acid (HCl) and silane coupling agent (SCA) were investigated. The most impressive results in terms of static and dynamic mechanical properties were achieved with SCA rather than HCl. When the effect of serpentine without any treatment is considered, reinforcing effect of it can easily be observed without deteriorating the composite properties even at high filler loadings. In group 2, the nanofiller effects of serpentine in 2 and 5 wt% filled compositions by modification of both the filler and the matrix were aimed to be examined with melt intercalation method. In addition to HCl and SCA treatments, maleic anhydride grafted polypropylene (PP-g-MA) and quaternary ammonium salt (QAS) of cetyl-trimethyl-ammonium bromide were used as compatibilizer and intercalating agent, respectively. While the amount of QAS was kept constant, different percentages of compatibilizer were employed. The presence of QAS and PP-g-MA further improved the properties with respect to group 1 members. Interestingly, the percentage strain at break values did not decrease as much as group 1 compositions with the same filler content. It can be concluded that partial intercalation of group 2 compositions was achieved, according to the X-ray and TEM results. Keywords: Serpentine, PP/serpentine composites, SCA, PP-g-MA, serpentine nanocomposites
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Town, Christopher Albert. "Instream aeration of the Serpentine River." Thesis, University of British Columbia, 1986. http://hdl.handle.net/2429/26335.

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Urban encroachment and intensive agricultural pursuits within the Serpentine-Nicomekl watershed (in proximity to Vancouver, B.C.) have caused a number of serious fish kills on the Serpentine River since 1980. Low dissolved oxygen levels were responsible for these kills. This study investigated some of the dynamic chemical and biological relationships within the river, as well as artificial aeration as a pollution abatement or in-situ improvement measure. Weekly sampling from July to December, 1985, inclusive, established a solid data base from which inciteful interrelationships were deduced. A strong correlation between chlorophyll-a and dissolved oxygen levels supported the hypothesis that, algae blooms dying in the Fall, create a massive oxygen demand. A prototype, (457 m) artificial aeration line was designed, installed and monitored to evaluate its potential for alleviating low dissolved oxygen conditions experienced in the Fall periods. The aeration system operated successfully during September, October and November of 1985; however, because of ideal weather conditions, dissolved oxygen levels never dropped below 7.3 mg/L, so the opportunity to evaluate in-situ oxygen transfer did not arise in 1985. Nevertheless, the data base generated supports the use of the prototype aeration unit as a means of "upgrading" a stretch of river subject to periodic, low, dissolved oxygen levels. Expansion of the system, to include other critical stretches of the Serpentine River, is strongly recommended.
Applied Science, Faculty of
Civil Engineering, Department of
Graduate
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Potts, Ian. "Particle Redistribution in Serpentine Engine Inlets." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1595542100917769.

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Hughes, Ruth. "Serpentine tolerance in the Mimulus guttatus complex." Thesis, University of Exeter, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.286489.

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Zhang, Lixin. "Dynamic analysis of viscoelastic serpentine belt drive systems." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0021/NQ45747.pdf.

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Laker, Travis S. "Secondary flows in a rotating serpentine circular duct." Thesis, Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/15898.

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Alvarez, Silva Mayeli. "Surface chemistry study on the pentlandite- serpentine system." Thesis, McGill University, 2011. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=97112.

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Abstract:
Interaction with MgO-minerals is one mechanism suspected to reduce selectivity in flotation of pentlandite from ultramafic ore. Understanding the surface chemistry of the minerals involved will lead to improved flotation conditions that maximize flotation selectivity. The first part of the thesis compares isoelectric point (i.e.p.) and point of zero charge (p.z.c.) determined using Mular-Roberts [M-R] titration technique of MgO-minerals chlorite, serpentine and talc. The M-R technique was unsuccessful with talc, attributed to Mg2+ acting as potential determining ion. For serpentine and chlorite, respectively, p.z.c. was pH 4.3 and 4.6 and i.e.p. pH 3.2 and <3. Dispersion index (DI) for chlorite suggested that aggregation/dispersion is controlled by both; serpentine remained dispersed, possibly due to hydration effects.The second part determines surface properties of pentlandite and serpentine isolated from an ultramafic ore. Zeta potential measurements were made on minerals alone and as mixtures with either indifferent electrolyte or supernatant derived from an ore suspension as background. Individual mineral results anticipated interaction due to electrostatic attraction. This was confirmed in the mixed mineral case, with Mg(OH)2 precipitate interaction as an additional factor. Scanning electron microscopy validated the findings.Aggregation/dispersion was determined by turbidimetry using a light scattering technique and optical microscopy. The effect of selected factors on aggregation/dispersion of pentlandite and serpentine was investigated by a design of experiment (DOE). Concentration of carboxymethyl cellulose, CMC, and the interaction between CMC and pH were the important factors. Contact angle measurements explored effects of several factors on pentlandite hydrophobicity and, using a DOE, small-scale flotation was used to investigate effects on pentlandite floatability. The pH was the most important factor, acidic pH increasing both hydrophobicity and floatability. Copper activation enhanced both properties, as well; magnesium affected hydrophobicity at alkaline pH, but it did not show significant effect on floatability; serpentine was detrimental to the process; and CMC was capable of partially restoring the hydrophobicity and floatability of pentlandite depressed with serpentine.
L'interaction de la pentlandite avec des minéraux d'oxide de magnésium (MgO-) est soupçonnée d'être à l'origine de la sélectivité réduite de la pentlandite dans les procédés de flottation de minerais ultrabasiques. Une meilleure compréhension de la chimie de surface des minéraux impliqués devrait mener à l'amélioration des conditions de flottation qui en maximisent la sélectivité. La première partie de la thèse compare le point isoélectrique (p.i.e) et le point de charge nulle (p.c.n), déterminés à l'aide de la technique de titrage Mular-Roberts [M-R], de minéraux d'oxide de magnésium tels que la chlorite, la serpentine et le talc. Dans le cas du talc, la technique M-R a échoué, probablement dû aux ions Mg2+ qui jouent le rôle d'ions déterminateurs de potentiel. Dans le cas de la serpentine et de la chlorite, les p.c.n. ont été déterminés à pH 4,3 et 4,6 respectivement et les p.i.e à pH 3,2 et <3 respectivement. Des tests de décantations ont suggéré que l'agrégation/dispersion observée pour la chlorite était contrôlée à la fois par le p.c.n et le p.i.e ; la serpentine au contraire est restée dispersée, possiblement dû à des effets d'hydratation. La deuxième partie détermine les propriétés de surface de la pentlandite et de la serpentine isolées à partir d'un minerai ultrabasique. Des mesures du potentiel zêta ont été effectuées sur les minéraux seuls et mélangés en présence d'un électrolyte, indifférent dans un cas et surnageant dans l'autre cas, préparé à partir d'une suspension de minerai utilisée comme milieu d'étude. Les résultats relatifs aux minéraux individuels et en particulier les forces d'attraction électrostatique observables ont permis d'anticiper leur interaction. Cette hypothèse a été confirmée dans le cas des minéraux mélangés, étant après avoir pris en compte l'interaction de précipités de Mg(OH)2 comme facteur additionnel. Des observations au microscope électronique à balayage ont permis de valider les résultats. L'agrégation/dispersion a été déterminée par décantation en utilisant des techniques de lumière diffuse et de microscopie optique. L'effet de certains facteurs sur l'agrégation/dispersion de la pentlandite et de la serpentine a été étudié sur la base d'un plan d'expériences (PE). Entre autres, la concentration en carboxymethyl cellulose (CMC) et l'interaction entre le CMC et le pH ont été considérés comme des facteurs importants. Des mesures d'angle de contact ont permis d'explorer l'hydrophobicité de la pentlandite et, à l'aide d'un PE, une étude de flottation à petite échelle a été réalisée pour investiguer la flottabilité de la pentlandite. Les résultats ont montrés que le pH était le facteur le plus important, un pH acide ayant pour effet d'augmenter à la fois l'hydrophobicité et la flottabilité. L'ajout de cuivre a également permis de renforcer ces deux propriétés par un effet d'activation; la présence de magnésium au contraire a affecté l'hydrophobicité de la pentlandite à pH alcalin mais n'a pas eu d'effet significatif sur ses propriétés de flottabilité; la présence de serpentine s'est trouvée être préjudiciable au procédé mais l'utilisation de CMC a pu être utilisée afin de restaurer partiellement l'hydrophobicité et la flottabilité de la pentlandite diminuées par la présence de la serpentine.
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Books on the topic "Serpentine"

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1923-, Coleman Robert Griffin, and Ernst W. G. 1931-, eds. Serpentine and serpentinites: Mineralogy, petrology, geochemistry, ecology, geophysics, and tectonics ; a tribute to Robert G. Coleman. Columbia, MD: Bellwether Pub. for the Geological Society of America, 2004.

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Middleton, Christopher. Serpentine. London: Oasis Books, 1985.

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B, Smith Stuart, ed. Serpentine. Truro (Croft Prince, Mount Hawke, Truro): Truran, 2005.

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Ciuban, Gavril. Serpentine. Cluj-Napoca: Grinta, 2007.

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Packer, Lewis. Serpentine futures. St Lucia: University of Queensland Press, 1986.

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Royal Art Lodge (Artists' group). Serpentine musings. Dublin: Douglas Hyde Gallery, 2005.

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Kurzmeyer, Roman. Schlangenlinien/Serpentine Lines. Vienna: Springer Vienna, 2011. http://dx.doi.org/10.1007/978-3-7091-0704-1.

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Walsh, Jill Paton. The serpentine cave. New York: St. Martin's Press, 1997.

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Harrison, Susan, and Nishanta Rajakaruna, eds. Serpentine. University of California Press, 2011. http://dx.doi.org/10.1525/9780520948457.

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Pon, Cindy. Serpentine. 2015.

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Book chapters on the topic "Serpentine"

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Guillot, Stephane. "Serpentine." In Encyclopedia of Astrobiology, 1503–4. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-11274-4_1429.

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Gooch, Jan W. "Serpentine." In Encyclopedic Dictionary of Polymers, 655. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_10476.

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Guillot, Stephane. "Serpentine." In Encyclopedia of Astrobiology, 2250. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-44185-5_1429.

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Guillot, Stephane. "Serpentine." In Encyclopedia of Astrobiology, 1. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-27833-4_1429-3.

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Guillot, Stephane. "Serpentine." In Encyclopedia of Astrobiology, 2738. Berlin, Heidelberg: Springer Berlin Heidelberg, 2023. http://dx.doi.org/10.1007/978-3-662-65093-6_1429.

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Kurzmeyer, Roman. "Serpentine Lines." In Schlangenlinien/Serpentine Lines, 65–86. Vienna: Springer Vienna, 2011. http://dx.doi.org/10.1007/978-3-7091-0704-1_2.

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Kurzmeyer, Roman. "Schlangenlinien." In Schlangenlinien/Serpentine Lines, 9–64. Vienna: Springer Vienna, 2011. http://dx.doi.org/10.1007/978-3-7091-0704-1_1.

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Walker, Stuart. "The Serpentine Walk." In Design and Spirituality, 29–30. Abingdon, Oxon ; New York : Routledge, 2021.: Routledge, 2020. http://dx.doi.org/10.4324/9781003107422-9.

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White, G. Norman, and Joe B. Dixon. "Kaolin-Serpentine Minerals." In Soil Mineralogy with Environmental Applications, 389–414. Madison, WI, USA: Soil Science Society of America, 2018. http://dx.doi.org/10.2136/sssabookser7.c12.

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Taheri, Alireza. "Serpentine Conceptual Autophagia." In Psychoanalytic Perspectives on the Films of Ingmar Bergman, 111–31. London: Routledge, 2022. http://dx.doi.org/10.4324/9781003200246-9.

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Conference papers on the topic "Serpentine"

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Shahmiri, Fereshteh, Chaoyu Chen, Anandghan Waghmare, Dingtian Zhang, Shivan Mittal, Steven L. Zhang, Yi-Cheng Wang, Zhong Lin Wang, Thad E. Starner, and Gregory D. Abowd. "Serpentine." In CHI '19: CHI Conference on Human Factors in Computing Systems. New York, NY, USA: ACM, 2019. http://dx.doi.org/10.1145/3290605.3300775.

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Matos, M., A. Correia, J. Pereira, and R. Oliveira. "Serpentine." In the 2008 ACM symposium. New York, New York, USA: ACM Press, 2008. http://dx.doi.org/10.1145/1363686.1364214.

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Dohler, G., D. Gagne, D. Gallagher, and R. Moats. "Serpentine waveguide TWT." In 1987 International Electron Devices Meeting. IRE, 1987. http://dx.doi.org/10.1109/iedm.1987.191465.

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Brand, M., B. Zhang, M. Popović, N. Dostart, and K. H. Wagner. "Serpentine Integrated Grating Spectrometer." In Computational Optical Sensing and Imaging. Washington, D.C.: OSA, 2021. http://dx.doi.org/10.1364/cosi.2021.cf2b.2.

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Mathur, Gursaran D. "Performance of Serpentine Heat Exchangers." In International Congress & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1998. http://dx.doi.org/10.4271/980057.

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Shi, Lei, and RongWei Guo. "Serpentine Inlet Design and Analysis." In 50th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2012. http://dx.doi.org/10.2514/6.2012-839.

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Chen, T. H., M. Menu, P. M. Champion, and L. D. Ziegler. "Heating Effect On Serpentine Jades." In XXII INTERNATIONAL CONFERENCE ON RAMAN SPECTROSCOPY. AIP, 2010. http://dx.doi.org/10.1063/1.3482535.

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Henning, Wade, Frank Hickman, and Howie Choset. "Motion Planning for Serpentine Robots." In Third ASCE Specialty Conference on Robotics for Challenging Environments. Reston, VA: American Society of Civil Engineers, 1998. http://dx.doi.org/10.1061/40337(205)1.

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Maity, Atanu, and S. Majumder. "Serpentine robot moves and postures." In 2011 IEEE 5th International Conference on Robotics, Automation and Mechatronics (RAM). IEEE, 2011. http://dx.doi.org/10.1109/ramech.2011.6070482.

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Togashi, Kenji, and Hiroshi Ito. "Information concealment in serpentine patterns." In 2013 IEEE 2nd Global Conference on Consumer Electronics (GCCE). IEEE, 2013. http://dx.doi.org/10.1109/gcce.2013.6664830.

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Reports on the topic "Serpentine"

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Doiron, A. Surficial geology, Serpentine Lake, New Brunswick. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2000. http://dx.doi.org/10.4095/211317.

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Juday, G. P. Alaska research natural areas: 3. Serpentine slide. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station, 1992. http://dx.doi.org/10.2737/pnw-gtr-271.

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Leslie, P., R. Wood, F. Sigler, A. Shapiro, and A. Rendon. Heat transfer coefficient in serpentine coolant passage for CCDTL. Office of Scientific and Technical Information (OSTI), December 1998. http://dx.doi.org/10.2172/345040.

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Berger, J., and E. Ramsay. Géologie De La Region Du Mont De La Serpentine, Gaspesie, Quebec. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1990. http://dx.doi.org/10.4095/130876.

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Palmer, A. J. M., and J. J. Clague. Diatom Assemblage Analysis and Sea Level Change, Serpentine River, British Columbia. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1991. http://dx.doi.org/10.4095/132634.

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Petersson, N., and B. Sjogreen. Serpentine: Finite Difference Methods for Wave Propagation in Second Order Formulation. Office of Scientific and Technical Information (OSTI), March 2012. http://dx.doi.org/10.2172/1046802.

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Doiron, A. La géochimie des tills de la région de Serpentine Lake, Nouveau-Brunswick. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1993. http://dx.doi.org/10.4095/184192.

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Zdraveva, Petranka, Dolja Pavlova, Ilina Krasteva, and Ivanka Pencheva. Phytochemical Analysis on Populations of Teucrium Chamaedrys from Serpentine Sites in Bulgaria. "Prof. Marin Drinov" Publishing House of Bulgarian Academy of Sciences, January 2018. http://dx.doi.org/10.7546/crabs.2018.02.05.

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Zdraveva, Petranka, Dolja Pavlova, Ilina Krasteva, and Ivanka Pencheva. Phytochemical Analysis on Populations of Teucrium Chamaedrys from Serpentine Sites in Bulgaria. "Prof. Marin Drinov" Publishing House of Bulgarian Academy of Sciences, February 2018. http://dx.doi.org/10.7546/grabs2018.2.05.

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Okura, Kiyoshi, and Yoshihiko Tatsumi. Analysis of Squeal Noise Radiated From Serpentine Belt for Accessories Drive Systems. Warrendale, PA: SAE International, September 2005. http://dx.doi.org/10.4271/2005-08-0644.

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