Academic literature on the topic 'Thiocyanate method'

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Journal articles on the topic "Thiocyanate method"

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Ding, Chengrong, Guofu Zhang, Lidi Xuan, and Yiyong Zhao. "Sulfuryl Fluoride Promoted Thiocyanation of Alcohols: A Practical Method for Preparing Thiocyanates." Synlett 31, no. 14 (2020): 1413–17. http://dx.doi.org/10.1055/s-0040-1707151.

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A novel SO2F2-promoted thiocyanation method for the one-step synthesis of thiocyanates through C–O bond cleavage of readily available alcohols with ammonium thiocyanate as the thiocyanating agent was developed. The method avoids the use of additional catalyst, and a variety of (hetero)arene, alkene and aliphatic alcohols reacted with high efficiency in ethyl acetate under mild conditions to afford the corresponding thiocyanates in excellent to quantitative yields with broad functional-group compatibility.
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Chakravorti, M. C., and Gampa V. B. Subrahmanyam. "Electrosynthesis of thiocyanato and mixed ligand thiocyanato complexes of transition metals by the sacrificial dissolution of metal anodes." Canadian Journal of Chemistry 70, no. 3 (1992): 836–38. http://dx.doi.org/10.1139/v92-110.

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A general method for the electrosynthesis of anionic and mixed ligand nonelectrolytic thiocyanato complexes of transition metals has been developed by the oxidation of sacrificial metal anodes in aqueous, or aqueous ethanolic, medium containing ammonium thiocyanate at room temperature and at an applied potential of 2–7 V. The method is rapid and gives good yield with high purity. Keywords: electrosynthesis, thiocyanato complexes, mixed ligand thiocyanato complexes.
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Ashiegbu, Darlington C., David Nkhoesa, Rudolph Erasmus, and Herman Johanes Potgieter. "Efficient Photodegradation of Thiocyanate Ions in Mining Wastewater Using a ZnO-BiOI Heterojunction." Materials 17, no. 15 (2024): 3832. http://dx.doi.org/10.3390/ma17153832.

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Mining industries have long relied on cyanidation as the primary method for gold extraction, but this process generates thiocyanates as a problematic byproduct, posing challenges for wastewater treatment and recycling. The stability of thiocyanates makes their reduction or elimination in mining wastewater difficult. In this study, a p-n heterojunction of ZnO and BiOI was created and evaluated for its ability to photodegrade thiocyanate ions under simulated solar conditions. Various analytical techniques revealed a highly porous structure with a sponge-like morphology and agglomeration in the s
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Mallikarjunaswamy, A. M. M., Gouthami Kuruvalli, Khajamohiddin Syed, Vaddi Damodara Reddy, and Vipin A. Nair. "An Efficient and Eco-Friendly Procedure for Electrophilic Thiocyanation of Anilines and 1-(Substituted benzylidene)-2-phenyl Hydrazines." Chemistry 6, no. 3 (2024): 476–88. http://dx.doi.org/10.3390/chemistry6030027.

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Thiocyanates form an important class of organic compounds commonly found in natural products that exhibit excellent antimicrobial activity. The electrophilic thiocyanation is one of the most effective methods of introducing a -SCN functional group to the parent organic molecule. In this work, we explored an eco-friendly and highly efficient method for thiocyanation of anilines and 1-(substituted benzylidene)-2-phenylhydrazines using commercially available N-bromoscuccinimide (NBS) and potassium thiocyanate (KSCN). The optimized protocol afforded thiocyanates with good regioselectivity and exce
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Haque, M. Rezaul, and J. Howard Bradbury. "Simple Method for Determination of Thiocyanate in Urine." Clinical Chemistry 45, no. 9 (1999): 1459–64. http://dx.doi.org/10.1093/clinchem/45.9.1459.

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Abstract Background: It would be useful to develop a simple kit method for determination of thiocyanate in urine, which could be used to monitor cyanide overload in cassava-consuming populations. Methods: The method was based on the quantitative oxidation of thiocyanate in acid permanganate at room temperature in a closed vial with liberation of HCN, which reacted with a picrate paper. For semiquantitative analysis in the field, the colored picrate paper was matched with a color chart prepared using known amounts of KSCN. In the laboratory, a more accurate result was obtained by elution of the
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Milosavljevic, Milutin, Ivan Vukicevic, Veis Serifi, et al. "Optimization of the synthesis of N-alkyl and N,N-dialkyl thioureas from waste water containing ammonium thiocyanate." Chemical Industry and Chemical Engineering Quarterly 21, no. 4 (2015): 501–10. http://dx.doi.org/10.2298/ciceq141221006m.

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The optimized methods for N-alkyl and N,N-dialkyl substituted thioureas synthesis starting from ammonium thiocyanates, waste water constituent from the production of tetramethylthiuram monosulfide (TMTS), and alkyl amine, are presented in this work. Therefore, thioureas synthesis was developed in two ways: Method I - reaction of the thiocyanate and alkylamine in the presence of hydrochloric acid; Method II - reaction of the thiocyanate with benzoyl chloride following by amine addition in the first step, and base hydrolysis in the second step. The structure of the synthesized compounds was conf
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Basavaiah, Kanakapura, and Bankavadi Chikkaswamy Somashekar. "Argentimetric assay of ranitidine in bulk drug and in dosage forms." Ecletica Quimica 32, no. 1 (2007): 19–26. http://dx.doi.org/10.26850/1678-4618eqj.v32.1.2007.p19-26.

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Two simple, rapid and cost-effective methods based on titrimetric and spectrophotometrictechniques are described for the assay of RNH in bulk drug and in dosage forms using silver nitrate, mer-cury(II)thiocyanate and iron(III)nitrate as reagents. In titrimetry, an aqueous solution of RNH is treatedwith measured excess of silver nitrate in HNO 3 medium, followed by determination of unreacted silvernitrate by Volhard method using iron(III) alum indicator. Spectrophotometric method involve the addi-tion a known excess of mercury(II)thiocyanate and iron(III)nitrate to RNH, followed by the measurem
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Sulistyarti, Hermin, Spas D. Kolev, and Stephanie Lim. "DEVELOPMENT OF FLOW INJECTION METHOD FOR ONLINE DETERMINATION OF THIOCYANATE BASED ON OXIDATION BY PERMANGANATE." Indonesian Journal of Chemistry 10, no. 2 (2010): 167–71. http://dx.doi.org/10.22146/ijc.21455.

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The importance of developing method for thiocyanate becomes obvious, because thiocyanate can inhibit iodine uptake of thyroid gland leading to mumps disease. In this work, thiocyanate is oxidized by permanganate in the acid donor stream to cyanide, which is directly converted to hydrogen cyanide. Then, hydrogen cyanide diffuses through a Teflon membrane into acceptor stream containing nickel(II) in ammoniacal buffer to form tetracyanonickelate(II) which is detected spectrophotometrically at 267 nm. Analytical figures of merit were linear up to 50 mg L-1 for thiocyanate, with RSD of 1.34%, and
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Kokorekin, Vladimir A., Sergey V. Neverov, Vera N. Kuzina, and Vladimir A. Petrosyan. "A New Method for the Synthesis of 3-Thiocyanatopyrazolo[1,5-a]pyrimidines." Molecules 25, no. 18 (2020): 4169. http://dx.doi.org/10.3390/molecules25184169.

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In this article, we demonstrate how an original effective “metal-free” and “chromatography-free” route for the synthesis of 3-thiocyanatopyrazolo[1,5-a]pyrimidines has been developed. It is based on electrooxidative (anodic) C–H thiocyanation of 5-aminopyrazoles by thiocyanate ion leading to 4-thiocyanato-5-aminopyrazoles (stage 1, yields up to 87%) following by their chemical condensation with 1,3-dicarbonyl compounds or their derivatives (stage 2, yields up to 96%). This method is equally effective for the synthesis of 3-thiocyanatopyrazolo[1,5-a]pyrimidines, both without substituents and wi
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Iswanto, Ponco, Irvan Maulana Firdaus, Ahmad Fawwaz Dafaulhaq, Ahmad Ghifari Ramadhani, Maylani Permata Saputri, and Heny Ekowati. "Quantitative Structure-Activity Relationship of 3-Thiocyanate-1H-Indoles Derived Compounds as Antileukemia by AM1, PM3, and RM1 Methods." Jurnal Kimia Sains dan Aplikasi 26, no. 3 (2023): 109–17. http://dx.doi.org/10.14710/jksa.26.3.109-117.

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Cancer is a disease with fatal consequences; thus, searching for innovative compounds with anticancer properties remains an active pursuit. One of the highly promising candidates is a compound derived from 3-thiocyanato-1H-indoles. However, the number of derivative compounds is currently limited. A quantitative structure and activity relationship (QSAR) study was conducted on derivate compounds 3-thiocyanato-1H-indoles to establish equations that predict the anticancer activity of more effective derivatives. This study aims to compare the effectiveness of the AM1 (Austin Model 1), PM3 (Paramet
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Dissertations / Theses on the topic "Thiocyanate method"

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Littke, Matthew Henry. "Effect of soil application method on surface emission rates of methyl isothiocyanate." Pullman, Wash. : Washington State University, 2010. http://www.dissertations.wsu.edu/Thesis/Spring2010/m_Littke_041410.pdf.

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Thesis (M.S. in environmental science)--Washington State University, May 2010.<br>Title from PDF title page (viewed on May 21, 2010). "School of Environmental Science and Regional Planning." Includes bibliographical references.
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Rang, Knut. "A study of the stereochemistry and electronic transitions of cyclic and acyclic thioamdes by crystallography, spectroscopy and computational methods." Lund : Lund University, 1998. http://catalog.hathitrust.org/api/volumes/oclc/40265658.html.

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Cotton, Charles E. "A computational study of thiocyanate based laser flash photolysis reporters." Virtual Press, 2006. http://liblink.bsu.edu/uhtbin/catkey/1348346.

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Radical chemistry has always been a very active area of research. This is due to the fact that radicals are both very numerous in variety and very reactive. A radical is any chemical species that possesses one or more unpaired electrons. These unpaired electrons usually lead to the extremely reactive characteristics of the chemical species. This reactivity can be beneficial; this is true in the case of polymer chemistry. For instance, some plastics are synthesized through a radical chain reaction. In addition, radicals are used in the synthesis of novel organic compounds with the goal of creat
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Chao, Sam, and 趙守誠. "A high-throughput screening method for antioxidant activity assay-modified thiocyanate method." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/57695914307936000954.

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碩士<br>國立清華大學<br>化學工程學系<br>89<br>A stable and sensitive modified thiocyanate method for measuring antioxidant activity has been developed. This method is used to evaluate the antioxidant activity by lipid peroxidation inhibition ability of various antioxidants. In this method, microperoxidase is used to accelerate lipid peroxidation by lipoxyl radical chain reaction thus produced, and lipid peroxide value is measured by thiocyanate method. The antioxidant activity of same common antioxidants, α-tocopherol, L-ascorbic acid, BHT and gallic acid, has been analyzed by this method. The re
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Nasr, Zeina. "Identification and isolation of plant promoters induced by thiocyanate." Thèse, 2007. http://hdl.handle.net/1866/8141.

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Books on the topic "Thiocyanate method"

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Great Britain. Standing Committee of Analysts., ed. Determination of sulphite, sulfur dioxide, thiosulphate, and thiocyanate: With notes on the determination of total sulphur and other sulfur compounds, 1985 : methods for the examination of waters and associated materials. H.M.S.O., 1987.

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Book chapters on the topic "Thiocyanate method"

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Baszkin, A. "Calcium-Thiocyanate Method for the Quantification of Sites on Polymer Surfaces." In Test Procedures for the Blood Compatibility of Biomaterials. Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-1640-4_22.

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Rolfs, Frank, Richard R. de Goeij-de Haas, Jaco C. Knol, Sander R. Piersma, and Connie R. Jimenez. "Phosphoproteomics After Guanidinium Thiocyanate Extraction of Tissue Biopsies." In Methods in Molecular Biology. Springer US, 2023. http://dx.doi.org/10.1007/978-1-0716-3457-8_16.

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Pannell, Keith H., and Adrian M. Haiduc. "Insertions of Thiocyanates, Cyanates, Nitriles, Isonitriles, and Imides." In Inorganic Reactions and Methods. John Wiley & Sons, Inc., 2007. http://dx.doi.org/10.1002/9780470145296.ch287.

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Braakman, René B. H., Anieta M. Sieuwerts, and Arzu Umar. "Shotgun Proteomics on Tissue Specimens Extracted with Acid Guanidinium-Thiocyanate-Phenol-Chloroform." In Methods in Molecular Biology. Springer New York, 2015. http://dx.doi.org/10.1007/978-1-4939-2519-3_6.

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Inglis, Adam S., John F. K. Wilshire, Franca Casagranda, and Robert L. Laslett. "C-terminal Sequencing: A New Look at the Schlack-Kumpf Thiocyanate Degradation Procedure." In Methods in Protein Sequence Analysis. Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-73834-0_18.

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Harrod, John F., and Bruce Arndtsen. "Insertion Reactions of Nitriles, Thiocyanates, Carbodi-Imides and Other Nitrogen-Containing Compounds." In Inorganic Reactions and Methods. John Wiley & Sons, Inc., 2007. http://dx.doi.org/10.1002/9780470145296.ch241.

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Prakash Jain, Buddhi, Shweta Pandey, and Shyamal K. Goswami. "Estimation of Iron by Thiocyanate Colorimetric Method." In Protocols in Biochemistry and Clinical Biochemistry. Elsevier, 2025. http://dx.doi.org/10.1016/b978-0-443-13945-1.00004-3.

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"AOAC Official Method 951.02Organic Thiocyanate in Livestock or Fly Sprays." In Official Methods of Analysis of AOAC INTERNATIONAL, 22nd ed. Oxford University Press, 2023. http://dx.doi.org/10.1093/9780197610145.003.1767.

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Westley, John. "Thiocyanate and thiosulfate." In Methods in Enzymology. Elsevier, 1987. http://dx.doi.org/10.1016/0076-6879(87)43008-5.

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Technical, AACC. "Preparation and Standardization of Ammonium and Potassium Thiocyanate Solutions." In AACC International Approved Methods. AACC International, 2009. http://dx.doi.org/10.1094/aaccintmethod-70-40.01.

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Conference papers on the topic "Thiocyanate method"

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Gonzalez, Magali E., Mariano A. Kappes, Martín A. Rodríguez, Ricardo M. Carranza, and Raul B. Rebak. "Optimization of the Double Loop Potentiokinetic Reactivation Method (DL-EPR) for Detecting Sensitization of UNS N06690." In CORROSION 2017. NACE International, 2017. https://doi.org/10.5006/c2017-09037.

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Abstract UNS N06690 is one of the current choices for nuclear power plant steam generator tubing. The alloy intensity to some submodes of stress corrosion cracking is a function of sensitization. Sensitization results from chromium carbide precipitation at grain boundaries when the alloy is exposed to temperatures of 500 to 800 °C, causing local chromium depletion in the adjacent zone. The objective of this work was the optimization of the double loop electrochemical potentiokinetic reactivation (DL-EPR) method for UNS N06690. Alloy specimens were tested under different heat treatments, tailor
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Frisbie, Seth H., Dennis K. Nelsen, and Sarita S. Croce. "Cyanide Generation, Corrosion, Treatment, and Discharge at a Petroleum Refinery." In CORROSION 1998. NACE International, 1998. https://doi.org/10.5006/c1998-98584.

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Abstract The objective of this research is to evaluate the fate of cyanide from generation during catalytic cracking to wastewater discharge at a petroleum refinery. The mechanism of hydrogen cyanide (HCN) generation during catalytic cracking is hypothesized. The extent and mechanism of cyanide-induced corrosion is evaluated from a mass balance of free cyanide, complexed cyanide, iron, and thiocyanate in hydrocarbon, sour water, and wastewater streams. Analytical methodologies are developed to identify and correct cyanide interferences in sour water for this mass balance. The results of the ma
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Leban, M., V. Doleček, A. Legat, and V. Kuhar. "A Comparison between Simultaneously Performed Measurements of Electrochemical Noise and the Mechanical Parameters of Tensile Test Specimens During SRLT Tests." In CORROSION 2000. NACE International, 2000. https://doi.org/10.5006/c2000-00374.

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Abstract The main aim of this study was to characterize EN measured during cracking processes, and to compare it with simultaneously measured mechanical changes. Electrochemical noise (EN) measurements have been performed using three electrodes made from the same piece of AISI 304 stainless steel, in one case of the sensitized and in the other case of the non-sensitized type. One of the electrodes, which was subjected to a constant, slowly increasing load (the SRLT test) acted as a working electrode. Measurements of the extension of a tensile test specimen were performed simultaneously with th
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Altamirano, Pablo M., Mariano A. Kappes, and Martín A. Rodríguez. "In-situ Determination of the Degree of Sensitization in Austenitic Stainless Steels by DL-EPR." In CONFERENCE 2022. AMPP, 2022. https://doi.org/10.5006/c2022-17805.

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Abstract The present study reports an ongoing research to use a standardized electrochemical test for determining the degree of sensitization (DOS) of austenitic stainless steel components and equipment non-destructively in the field. DOS is understood as the higher rate of dissolution at the grain boundary region vs. the bulk grain, which is related to a chromium-depleted zone near the grain boundary. The double loop electrochemical potentiokinetic reactivation method (DL-EPR) was taken as a reference. Tests were performed in austenitic stainless steel type AISI 304 (UNS S30400). The main par
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Toribio, Jesús, Miguel Lorenzo, Diego Vergara, and Viktor Kharin. "Role of Drawing-Induced Residual Stresses and Strains on Hydrogen Embrittlement of Cold Drawn Wires." In CORROSION 2010. NACE International, 2010. https://doi.org/10.5006/c2010-10295.

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Abstract Hydrogen Induced Fracture (HIF) plays an important role in the environmental cracking of cold drawn prestressings steel wires. The Standard Test in Ammonium Thiocyanate was proposed by the International Federation of Prestressing (FIP) as a suitable experimental method for checking the susceptibility of high-strength prestressing steels to hydrogen embrittlement. However, the FIP tests usually exhibit a high scattering of the results. It can be caused by the distribution of residual stresses and strains generated in the vicinity of the wire surface during the manufacturing (cold drawi
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Leban, M., V. Doleček, A. Legat, and V. Kuhar. "Comparison of ECN Measurements and Analysis During the SCC Processes on Stainless Steel under Different Mechanical Conditions." In CORROSION 1999. NACE International, 1999. https://doi.org/10.5006/c1999-99202.

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Abstract Electrochemical noise measurements have been performed on electrodes made from the same piece of stainless steel, of type AISI 304. Potential and current noise were measured under open circuit conditions in a three-electrode system, where one of the electrodes was kept under the load and acted as a common working electrode. Two types of electrode set-ups were used, differing in the method of load application. In the first case the common electrode was in the shape of a U-bend (under a static, undefined load), whereas in the second case the common electrode was subjected to a constant,
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Electricwala, A., and T. Atkinson. "TANDEM PURIFICATION OF TISSUE PLASMINOGEN ACTIVATOR BY METAL CHELATE AND AFFINITY CHROMATOGRAPHY." In XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1644831.

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A tandem purification procedure was developed by a combination of metal chelate and affinity chromatography. The conditioned medium from different cell lines producing tissue plasminogen activator was first chromatographed on a zinc chelate-agarose column equilibrated with low ionic strength buffer. After thorough washing, the column was connected to a lysine-agarose column, previously equilibrated with the same buffer. Tissue plasminogen activator was eluted from the zinc chelate column by a gradient of imidazole and the effluent was allowed to flow through lysine-agarose matrix. The two colu
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Fujiwara, Tamio, Hiroshi Ohue, and Takumi Urata. "Demonstration of the Enhanced Mixing and Reaction Ability of an Alternate Pumping Microreactor With Visualization of the Mixing Field and the Reaction Field." In ASME 2010 8th International Conference on Nanochannels, Microchannels, and Minichannels collocated with 3rd Joint US-European Fluids Engineering Summer Meeting. ASMEDC, 2010. http://dx.doi.org/10.1115/fedsm-icnmm2010-30059.

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In order to enhance the mixing and reaction capabilities of micromixers and microreactors, we had proposed a novel system termed alternate pumping microreactor (APMR) and had demonstrated that the APMR could generate a thin-layered structure under a particular pumping condition. This flow pattern should enhance the abovementioned capabilities. In this paper, we visualized the dilution process of methylene blue solution with water in the APMR and established a method to obtained the concentration field from the captured image according to the relation between the methylene blue concentration an
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Newman, J., and D. Farb. "LARGE SCALE PREPARATION OF VON WILLEBRAND FACTOR BY AFFINITY CHROMATOGRAPHY." In XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1644093.

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Treatment of bleeding in von Willebrand's disease usually consists of the infusion of cryoprecipitate or plasma. DDAVP is effective in some patients. Commercial concentrates for the treatment of Hemophilia A are ineffective as a source of von Willebrand Factor (vWF) replacement in von Willibrand's disease presumedly because of the absence of higher molecular weight forms of vWF protein. A vWF concentrate obtained during the course of preparation of an affinity purified Factor VIII may provide an alternative therapeutic agent without impacting the available Factor VIII supplies. The process use
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