Academic literature on the topic 'Substituted chromates'

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Journal articles on the topic "Substituted chromates"

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Mikhaylovskaya, Z. A., E. S. Buyanova, S. A. Petrova, M. V. Morozova, N. V. Tarakina, and M. V. Kuznetsov. "Substituted bismuth vanadates and chromates: New aspects." Russian Journal of Inorganic Chemistry 62, no. 11 (2017): 1441–49. http://dx.doi.org/10.1134/s0036023617110122.

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Modi, K. B. "Elastic moduli determination through IR spectroscopy for zinc substituted copper ferri chromates." Journal of Materials Science 39, no. 8 (2004): 2887–90. http://dx.doi.org/10.1023/b:jmsc.0000021472.00590.9b.

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Chhantbar, M. C., K. B. Modi, and H. H. Joshi. "Compositional, temperature and frequency dependence of dielectric behaviour of zinc substituted copper- ferri-chromates." Journal of Materials Science 42, no. 16 (2007): 6989–95. http://dx.doi.org/10.1007/s10853-006-1240-z.

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M., K. Mishra, Sharma Monica, and Sharma Vinita. "Kinetics and mechanism of the oxidation of aliphatic primary alcohols by benzyltriethylammonium chlorochromate." Journal of Indian Chemical Society Vol. 83, Apr 2006 (2006): 364–68. https://doi.org/10.5281/zenodo.5836279.

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DRDO, Defence Laboratories, Jodhpur, Rajasthan, India Modi Institute of Engineering, Kota, Rajasthan, India Department of Chemistry, J. N. V. University, Jodhpur-342 005, Rajasthan, India <em>Manuscript received 6 April 2005. revised 19 August 2005, accepted 16 December 2005</em> The oxidation of nine aliphatic primary alcohols by benzyltriethylammonium chlorochromate (BTEACC) in dimethylsu sulfoxide(DMSO) leads to the formation of corresponding aldehydes.The reaction is first order with respect to both BTEACC and the alcohol. The reaction is catalysed by hydrogen ions. The hydrogen-ion depend
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Jack, E. M., C. J. Harrison, G. R. White, C. H. Ockey, and T. D. Allen. "Fine-structural aspects of bromodeoxyuridine incorporation in sister chromatid differentiation and replication banding." Journal of Cell Science 94, no. 2 (1989): 287–97. http://dx.doi.org/10.1242/jcs.94.2.287.

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The structure of harlequin-stained chromosomes following substitution with low levels of 5-bromodeoxyuridine (BrdUrd) over two cell cycles and high levels over the last part of one cycle (replication banding) was studied in Chinese hamster ovary (CHO) cells. By using correlative light (LM) and scanning electron microscopy (SEM), it was shown that the effects of both the ultraviolet light (u.v.) and hot SSC treatment steps of the harlequin staining procedure were necessary to obtain sister-chromatid differentiation (SCD) or replication banding. u.v. treatment alone resulted in dark Giemsa stain
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Jin, Hui, Vincent Guacci, and Hong-Guo Yu. "Pds5 is required for homologue pairing and inhibits synapsis of sister chromatids during yeast meiosis." Journal of Cell Biology 186, no. 5 (2009): 713–25. http://dx.doi.org/10.1083/jcb.200810107.

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During meiosis, homologues become juxtaposed and synapsed along their entire length. Mutations in the cohesin complex disrupt not only sister chromatid cohesion but also homologue pairing and synaptonemal complex formation. In this study, we report that Pds5, a cohesin-associated protein known to regulate sister chromatid cohesion, is required for homologue pairing and synapsis in budding yeast. Pds5 colocalizes with cohesin along the length of meiotic chromosomes. In the absence of Pds5, the meiotic cohesin subunit Rec8 remains bound to chromosomes with only minor defects in sister chromatid
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Yang, Bei-Bei, Fan Gao, Ya-Dong Yang, Ru Wang, Xin Li, and Li Li. "Stereochemistry of Chiral 2-Substituted Chromanes: Twist of the Dihydropyran Ring and Specific Optical Rotation." Molecules 28, no. 1 (2023): 439. http://dx.doi.org/10.3390/molecules28010439.

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Chiral 2-substituted chromanes are important substructures in organic synthesis and appear in numerous natural products. Herein, the correlation between specific optical rotations (SORs) and the stereochemistry at C2 of chiral 2-substituted chromanes was investigated through data mining, quantum-chemical calculations using density functional theory (DFT), and mechanistic analyses. For 2-aliphatic (including acyloxy and alkenyl) chromanes, the P-helicity of the dihydropyran ring usually corresponds to a positive SOR; however, 2-aryl chromanes with P-helicity tend to exhibit negative SORs. 2-Car
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Lin, Xiaoju, Gaoling Wei, Xiaoliang Liang, Jing Liu, Lingya Ma, and Jianxi Zhu. "The Competitive Adsorption of Chromate and Sulfate on Ni-Substituted Magnetite Surfaces: An ATR-FTIR Study." Minerals 11, no. 1 (2021): 88. http://dx.doi.org/10.3390/min11010088.

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With similar chemical properties and geometrical configurations, sulfate and chromate display interesting competitive adsorption on mineral surfaces. Although such issues have been investigated on several Fe (hydr)oxide surfaces, e.g., ferrihydrite, goethite and hematite, the competitive adsorption on magnetite surfaces and the constraint mechanism have seldom been studied. This impedes the understanding of the transfer and fate of chromate and sulfate on magnetite surfaces, as magnetite is not only a useful adsorbent but also an efficient reductant to decrease the mobility and toxicity of chr
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King, J., L. A. Roberts, M. J. Kearsey, et al. "A Demonstration of a 1:1 Correspondence Between Chiasma Frequency and Recombination Using a Lolium perenne/Festuca pratensis Substitution." Genetics 161, no. 1 (2002): 307–14. http://dx.doi.org/10.1093/genetics/161.1.307.

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Abstract A single chromosome of the grass species Festuca pratensis has been introgressed into Lolium perenne to produce a diploid monosomic substitution line (2n = 2x = 14). The chromatin of F. pratensis and L. perenne can be distinguished by genomic in situ hybridization (GISH), and it is therefore possible to visualize the substituted F. pratensis chromosome in the L. perenne background and to study chiasma formation in a single marked bivalent. Recombination occurs freely in the F. pratensis/L. perenne bivalent, and chiasma frequency counts give a predicted map length for this bivalent of
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Fouyet, Sophie, Elodie Olivier, Pascale Leproux, Mélody Dutot, and Patrice Rat. "Bisphenol A, Bisphenol F, and Bisphenol S: The Bad and the Ugly. Where Is the Good?" Life 11, no. 4 (2021): 314. http://dx.doi.org/10.3390/life11040314.

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Background: Bisphenol A (BPA), a reprotoxic and endocrine-disrupting chemical, has been substituted by alternative bisphenols such as bisphenol F (BPF) and bisphenol S (BPS) in the plastic industry. Despite their detection in placenta and amniotic fluids, the effects of bisphenols on human placental cells have not been characterized. Our objective was to explore in vitro and to compare the toxicity of BPA to its substitutes BPF and BPS to highlight their potential risks for placenta and then pregnancy. Methods: Human placenta cells (JEG-Tox cells) were incubated with BPA, BPF, and BPS for 72 h
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Book chapters on the topic "Substituted chromates"

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Mezzanotte, Roberto, and Mariella Nieddu. "A Historical Overview of Bromo-Substituted DNA and Sister Chromatid Differentiation." In Methods in Molecular Biology. Humana Press, 2013. http://dx.doi.org/10.1007/978-1-62703-706-8_8.

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Everett, Walter. "Chromatic Harmony." In The Foundations of Rock. Oxford University PressNew York, NY, 2008. http://dx.doi.org/10.1093/oso/9780195310238.003.0011.

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Abstract It will be recalled that roots descending in fifths create the most compellingly directed harmonic motion. Normally, as these roots progress through the diatonic degrees of a major key, a variety of major and minor triads results. The progression, ii—V—I, for instance, has a minor triad followed by two major triads. When seventh chords descend by fifths, there is even more variety in the qualities of the chords in relation to one another. However, all of these chord qualities are adjustable through the chromatic alterations of tones that can make any minor triad into a major one by ra
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Smith, Kenneth M. "Epilogue." In Desire in Chromatic Harmony. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780190923426.003.0008.

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It is my hope that the project of this book is continued, and that its extensions will stray from the modest tools I have proposed for zooming into the micro detail of the musical surface: drive analysis and neofunctional metaphoric-metonymic rotation. Equally, I hope that the tools for analyzing this turbulent music will undergo their own cybernetic autopoiesis through future refinement and probable release from their psychodynamic genesis (though there will always be an operative trace of their origin). It should be clear that, although the creative disruptive force of the turn of the twenti
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Mol J.M.C., Garcia S.J., Gonzalez-Garcia Y., and Hughes A.E. "Self healing corrosion protective coatings." In Self Healing Materials. IOS Press, 2015. https://doi.org/10.3233/978-1-61499-514-2-207.

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One of the most efficient and cost-effective methods for corrosion protection is the application of organic coatings as physical barriers separating metal substrates and corrosive environment. For many decades, leaching of efficient yet toxic hexavalent chromium-containing pigments have shown to enable extending the longevity of corrosion protection upon damage. The search for eco- and human-friendly alternatives as investigated in this work has shown big advances in the field, allowing for some optimism about the development of novel substitute(s) to chromate in the near future. Furthermore,
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Conference papers on the topic "Substituted chromates"

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Tenopir, T. J., B. B. Bavarian, and M. Zamanzadeh. "VOC-Compliant Paint Systems (Part 1) How Well Do They Perform in the Marine Environment?" In CORROSION 1991. NACE International, 1991. https://doi.org/10.5006/c1991-91482.

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Abstract The majority of paints currently used for US Navy ship structures and fire control systems exceed California VOC (Volatile Organic Content) ceiling levels. As a result, paints currently specified cannot be applied in most California locations. This trend is becoming more widespread as other states follow California’s lead. In addition, zinc chromate primers are banned by the us Department of Defense (DOD) due to their suspected carcinogenic nature. Clearly, new paint systems need to be specified which comply with DOD/California VOC regulations and yet perform as well or better than cu
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Tenopir, T. J. "Performance of New Generation VOC Compliant and Chromate-Free Coatings in Military Applications." In CORROSION 1994. NACE International, 1994. https://doi.org/10.5006/c1994-94619.

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Abstract Environmental regulations controlling paint use vary widely between states/cities/counties and undergo constant change. Regardless of locality, however, allowable volatile organic content (VOC) levels are being reduced. All federal government agencies must now fully comply with any state/city/county regulations. In addition, zinc chromate primers are banned by the US Department of Defense (DOD). DOD plans to reduce allowed lead levels in paints for military applications to 50 parts per million by 1994 wherever possible. In order to meet these challenges, the US Navy must constantly re
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Menke, Joseph. "Phosphate Coated Zinc Plating – an Alternative to Cadmium Plating on Fasteners." In CORROSION 2002. NACE International, 2002. https://doi.org/10.5006/c2002-02137.

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Abstract Alternatives to cadmium plating on fasteners have been evaluated for a number of years. Torque-tension and corrosion resistance characteristics have been the major concerns. Zinc plating has been a popular substitute, but torque-tension at proper preloads on Grade 8 fasteners requires approximately 33 percent more torque. Zinc plating with a supplemental phosphate coating in lieu of the typical supplemental chromate coating was evaluated as an alternative to cadmium plating. Torque-tension and salt spray corrosion resistances were determined for Grade 8 fasteners. Torque-tension tests
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Agarwala, V. S., and A. S. Fabiszewski. "Multifunctional Corrosion Inhibitors for Protective Coatings." In CORROSION 1994. NACE International, 1994. https://doi.org/10.5006/c1994-94616.

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Abstract A chemical system called DNBM (a mixture of quaternary ammonium salts of dichromate, nitrate, borate and molybdate) was developed to inhibit corrosion fatigue and stress corrosion cracking, as well as general corrosion, in high strength steels and Aluminum alloys. In this study, DNBM in neat Compound form was examined as a possible substitute inhibitor in standard epoxy primer coatings. The DNBM was added into a very basic epoxy coating consisting of only one relatively inert pigment and also into a clear, resin-only system in order to determine it's isolated performance. The tests we
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Clavadetscher, John E. "Infant chromatic pupillary response similar to protanopes." In OSA Annual Meeting. Optica Publishing Group, 1988. http://dx.doi.org/10.1364/oam.1988.mz8.

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Previous studies have shown that red and green CRT lights that are approximately equiluminant for normal adults produce strong pupillary constrictions to both directions of exchange when one is suddenly substituted for the other. In contrast, protanopes and infants less than two months old show vigorous responses only to red → green exchanges and not to green → red exchanges of these lights. The current experiment presented red → green exchanges to three- and seven-week-old infants and to adult normals and protanopes. Among the lights tested were red-green pairs that were approximate scotopic,
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Zemanová, Matilda, Barbora Šopová, Jaroslav Fojt, and Katarína Tomanová. "Comparison of progressive sealing methods of anodized aluminium as potential substitute for the chromate sealing." In 1st Corrosion and Materials Degradation Web Conference. MDPI, 2021. http://dx.doi.org/10.3390/cmdwc2021-09958.

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Navarini, Jussara, Helio G. Bonacorso (PQ), Carson W. Wiethan, et al. "Stereoselective hydrogenation of 3-acyl-substituted 2- (trifluoromethyl)-2H-chromen-5-one and chromane scaffolds in NaBH4 /ethanol medium." In 15th Brazilian Meeting on Organic Synthesis. Editora Edgard Blücher, 2013. http://dx.doi.org/10.5151/chempro-15bmos-bmos2013_2013104165710.

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Tobin, Genevieve Mary. "The silver lining: preliminary research into gold-coloured varnishes for loss compensation in two 19th C silver gilded frames." In RECH6 - 6th International Meeting on Retouching of Cultural Heritage. Editorial Universitat Politècnica de València, 2021. http://dx.doi.org/10.4995/rech6.2021.13498.

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Golden varnishes appear on frames, furniture, wall hangings, leatherwork, panel paintings, mural paintings, and polychromy, and were applied to white metal gilding to imitate gold and other semi-precious materials. Despite the number of examples in cultural heritage there are few publications that discuss the ethical considerations of treating coloured silver gilded surfaces. The chromatic reintegration of gold-coloured varnishes on white metal gilding present specific material and technical challenges. In 2021 the Art Gallery of New South Wales (AGNSW) treated two identical late 19th century
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Choi, Alexander, Tyler Luneski, Zbigniew M. Bzymek, Vito Moreno, and Geri Gonxhe. "A Search for Optimal Friction Resistant Material to Cover Contact Surfaces: A Case Study in the Senior Mechanical Engineering Design Student Project." In ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-65481.

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The University of Connecticut Department of Mechanical Engineering has developed an industry recognized Senior Design Capstone course that provides students the opportunity for a major design experience. This paper will discuss the issues and challenges associated with project demonstrated on the base of the Search for Optimal Friction Resistant Material to Cover Contact Surfaces in an Electric Manual Switch. In order to determine the viability of potential substitute materials, the team produced custom testing rigs to evaluate material wear and corrosion performance. The construction of these
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