diphenylcarbazide

Summary

Summary: Used as an indicator in titrating iron and for the colorimetric determination of chromium and the detection of cadmium, mercury, magnesium, aldehydes, and emetine.

Top Publications

  1. ncbi Spectrophotometric detection of iodide and chromic (III) in urine after oxidation to iodine and chromate (VI)
    Buddha D Paul
    Division of Forensic Toxicology, Office of the Armed Forces Medical Examiner, Armed Forces Institute of Pathology, Rockville, Maryland 20850, USA
    J Anal Toxicol 29:658-63. 2005
  2. ncbi pH dependence of the efficiency of binding of iron cations to the donor side of photosystem II
    B K Semin
    Faculty of Biology, Lomonosov Moscow State University, Moscow 119899, Russia
    Biochemistry (Mosc) 69:331-9. 2004
  3. ncbi Solid phase extraction of chromium(VI) from aqueous solutions by adsorption of its diphenylcarbazide complex on an Amberlite XAD-4 resin column
    N Rajesh
    Chemistry Group, Birla Institute of Technology and Science, Pilani, Rajasthan 333031, India
    J Hazard Mater 150:723-7. 2008
  4. ncbi Interactions between diphenylcarbazide, zinc, cobalt, and manganese on the oxidizing side of photosystem II
    M L Ghirardi
    Photoconversion Branch, National Renewable Energy Laboratory, Golden, Colorado 80401, USA
    Biochemistry 35:1820-8. 1996
  5. ncbi Hydrogen peroxide inhibits photosynthetic electron transport in cells of cyanobacteria
    V D Samuilov
    Department of Cell Physiology and Immunology, School of Biology, Lomonosov Moscow State University, Moscow, 119899, Russia
    Biochemistry (Mosc) 66:640-5. 2001
  6. ncbi Effect of organic solvents in the on-line thermal lens spectrometric detection of chromium(III) and chromium(VI) after ion chromatographic separation
    M Sikovec
    Laboratory of Environmental Research, Nova Gorica Polytechnic, Slovenia
    J Chromatogr A 920:119-25. 2001
  7. doi Determination of Cr(VI) concentration in diluted samples based on the paper test strip method
    F Kong
    Key Laboratory of Pulp and Paper Engineering of Education Ministry of China, Shandong Institute of Light Industry, Jinan 250353, China
    Water Sci Technol 60:3083-9. 2009
  8. ncbi Continuous ultrasound-assisted extraction of hexavalent chromium from soil with or without on-line preconcentration prior to photometric monitoring
    J L Luque-García
    Analytical Chemistry Division, Annex C 3, Campus of Rabanales, University of Cordoba, E 14071 Cordoba, Spain
    Analyst 127:1115-20. 2002
  9. ncbi Determination of hexavalent chromium at the level of the California Public Health Goal by ion chromatography
    D H Thomas
    Dionex Corporation, Sunnyvale, CA 94088 3606, USA
    J Chromatogr A 956:255-9. 2002
  10. doi Ultra-trace recognition and removal of toxic chromium (VI) ions from water using visual mesocaptor
    Md A Shenashen
    National Institute for Materials Science NIMS, 1 2 1 Sengen, Tsukuba shi, Ibaraki 305 0047, Japan
    J Hazard Mater 244:726-35. 2013

Scientific Experts

  • N Rajesh
  • Luis C Malacarne
  • Jing Fan
  • Kenneth E Ferslew
  • Dorota Swiecicka
  • Liliana B Villegas
  • Rob L Dean
  • Tetsuo Inui
  • Liang Feng
  • M D Mamedov
  • B K Semin
  • B D Paul
  • Y Nakano
  • Mike Gardner
  • K Ashley
  • M Y Kultisheva
  • W Hillier
  • Vitaly D Samuilov
  • A H Wu
  • Jian Ma
  • F El-Kabbany
  • Shaili Srivastava
  • Sergey A Khorobrykh
  • Denis V Yanykin
  • Vyacheslav V Klimov
  • Blas Lotina-Hennsen
  • Md A Shenashen
  • Mohammad Behbahani
  • Poomrat Rattanarat
  • Seyedeh Mahboobeh Yousefi
  • - Sarenqiqige
  • Mingming Zou
  • Robert H Byrne
  • M L Ghirardi
  • M Hafez
  • W L Castilleja-Rivera
  • Hongqi Chen
  • S Taha
  • Hiroki Hotta
  • A A Khorobrykh
  • Stanislawa Koronkiewicz
  • Andrei A Khorobrykh
  • Ruyang Han
  • Andrew Broadway
  • Kazuhisa Yoshimura
  • Manuela L Kim
  • F Kong
  • V N Kurashov
  • Jing Li
  • Ryan L Peterson
  • Pedro A Castelo-Branco
  • Beatriz King-Diaz
  • Marta A Polti
  • Abdolkarim Abbaspour
  • Tanai Cardona
  • Cherrine K Pires
  • Rémy Beauchemin
  • Félix Morales-Flores
  • Nathan A Carrington
  • B D Real
  • E Campos
  • Maria Isabel Aguilar
  • Indu Shekhar Thakur
  • Cristina Pagliano
  • Shiro Matsuoka
  • Raquel González-Vázquez
  • F Priego-Capote
  • Melissa A Singer Pressman
  • Saima Q Memon
  • Robert Carpentier
  • Wen Chen
  • K Sivakumar
  • Kyle J Hazelwood
  • M D Luque de Castro
  • Jolly M Sankalia
  • V V Klimov
  • P Salinas-Hernández
  • Pavel Kuban
  • Deng ming Sun
  • T Becquer
  • Suleyman I Allakhverdiev
  • Dongxing Yuan
  • Sivanildo da Silva Borges
  • Elianna Castillo
  • D H Thomas
  • S A Khorobrykh
  • J L Luque-García
  • Charles S Henry
  • Zhiqiu Wang
  • Sherif A El-Safty

Detail Information

Publications91

  1. ncbi Spectrophotometric detection of iodide and chromic (III) in urine after oxidation to iodine and chromate (VI)
    Buddha D Paul
    Division of Forensic Toxicology, Office of the Armed Forces Medical Examiner, Armed Forces Institute of Pathology, Rockville, Maryland 20850, USA
    J Anal Toxicol 29:658-63. 2005
    ..this study, chromic was oxidized to chromate by hydrogen peroxide and sodium hydroxide and detected by 1,5-diphenylcarbazide. Linearity was 5.2 to 156 mg/L (0.1 to 3.0 mmol/L, y = 1.0285x - 0.0034, R2 = 0.9998)...
  2. ncbi pH dependence of the efficiency of binding of iron cations to the donor side of photosystem II
    B K Semin
    Faculty of Biology, Lomonosov Moscow State University, Moscow 119899, Russia
    Biochemistry (Mosc) 69:331-9. 2004
    ..The pH dependence of the blocking was measured using the diphenylcarbazide/2,6-dichlorophenolindophenol test. The curve of the pH dependence is bell-shaped with pK1 = 5.8 and pK2 = 8...
  3. ncbi Solid phase extraction of chromium(VI) from aqueous solutions by adsorption of its diphenylcarbazide complex on an Amberlite XAD-4 resin column
    N Rajesh
    Chemistry Group, Birla Institute of Technology and Science, Pilani, Rajasthan 333031, India
    J Hazard Mater 150:723-7. 2008
    A method has been developed for the solid phase extraction of chromium(VI) based on the adsorption of its diphenylcarbazide complex on an Amberlite XAD-4 resin column...
  4. ncbi Interactions between diphenylcarbazide, zinc, cobalt, and manganese on the oxidizing side of photosystem II
    M L Ghirardi
    Photoconversion Branch, National Renewable Energy Laboratory, Golden, Colorado 80401, USA
    Biochemistry 35:1820-8. 1996
    ..e., Asp170 on D1, as found by other investigators)...
  5. ncbi Hydrogen peroxide inhibits photosynthetic electron transport in cells of cyanobacteria
    V D Samuilov
    Department of Cell Physiology and Immunology, School of Biology, Lomonosov Moscow State University, Moscow, 119899, Russia
    Biochemistry (Mosc) 66:640-5. 2001
    ..Photosynthetic electron transfer in the cells treated with H2O2 was not maintained by H2O2, NH2OH, 1,5-diphenylcarbazide, tetraphenylboron, or butylated hydroxytoluene added as artificial electron donors for Photosystem (PS) II...
  6. ncbi Effect of organic solvents in the on-line thermal lens spectrometric detection of chromium(III) and chromium(VI) after ion chromatographic separation
    M Sikovec
    Laboratory of Environmental Research, Nova Gorica Polytechnic, Slovenia
    J Chromatogr A 920:119-25. 2001
    ..pre-column derivatized Cr(III)-pyridine-2,6-dicarboxylic acid, and post-column derivatized Cr(VI)-1,5-diphenylcarbazide] following the ion chromatographic separation on a Dionex HPIC-CS5A solvent compatible column...
  7. doi Determination of Cr(VI) concentration in diluted samples based on the paper test strip method
    F Kong
    Key Laboratory of Pulp and Paper Engineering of Education Ministry of China, Shandong Institute of Light Industry, Jinan 250353, China
    Water Sci Technol 60:3083-9. 2009
    ..The Cr(VI)-containing test strip was then immersed into a diphenylcarbazide (DPC) solution (a color forming solution), and the color intensity was correlated to the Cr(VI) ..
  8. ncbi Continuous ultrasound-assisted extraction of hexavalent chromium from soil with or without on-line preconcentration prior to photometric monitoring
    J L Luque-García
    Analytical Chemistry Division, Annex C 3, Campus of Rabanales, University of Cordoba, E 14071 Cordoba, Spain
    Analyst 127:1115-20. 2002
    ..The coloured complex formed between 1,5-diphenylcarbazide (DPC) and CrVI was used as recommended in EPA method 7196A because it is one of the most sensitive and ..
  9. ncbi Determination of hexavalent chromium at the level of the California Public Health Goal by ion chromatography
    D H Thomas
    Dionex Corporation, Sunnyvale, CA 94088 3606, USA
    J Chromatogr A 956:255-9. 2002
    ..0 ml/min, a 1000 microl injection volume, and postcolumn reaction with 2 mM diphenylcarbazide-10% methanol-0...
  10. doi Ultra-trace recognition and removal of toxic chromium (VI) ions from water using visual mesocaptor
    Md A Shenashen
    National Institute for Materials Science NIMS, 1 2 1 Sengen, Tsukuba shi, Ibaraki 305 0047, Japan
    J Hazard Mater 244:726-35. 2013
    The key to designing optical mesocaptors is to construct a chromogenic receptor, namely, diphenylcarbazide (DPC), as a nanoscale platform scavenger with different functional characteristics, such as density, accessibility, and intrinsic ..
  11. ncbi Automation of liquid-liquid extraction-spectrophotometry using prolonged pseudo-liquid drops and handheld CCD for speciation of Cr(VI) and Cr(III) in water samples
    Wen Chen
    Key Laboratory of Green Chemistry and Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, P R China
    Anal Sci 21:1189-93. 2005
    ..In the medium of perchloric acid solution, Cr(VI) reacted with 1,5-diphenylcarbazide (DPC); the formed complex was automatically extracted into n-pentanol, with a preconcentration ratio of ..
  12. doi Selective and sensitive speciation analysis of Cr(VI) and Cr(III) in water samples by fiber optic-linear array detection spectrophotometry after ion pair based-surfactant assisted dispersive liquid-liquid microextraction
    Seyedeh Mahboobeh Yousefi
    Department of Analytical Chemistry, Faculty of Chemistry, University College of Science, University of Tehran, PO Box 14155 6455, Tehran, Iran
    J Hazard Mater 254:134-40. 2013
    ..Cr(VI) ions were converted into their cationic complex with 1,5-diphenylcarbazide (DPC) and then extracted into 1-octanol dispersed in aqueous solution...
  13. ncbi Photoconsumption of oxygen in photosystem II preparations under impairment of the water-oxidizing complex
    S A Khorobrykh
    Institute of Basic Biological Problems, Russian Academy of Sciences, Pushchino, Moscow Region, 142290, Russia
    Biochemistry (Mosc) 67:683-8. 2002
    ..5-9.0. The addition of either artificial electron donors for PSII such as MnCl2 or diphenylcarbazide, or diuron as an inhibitor of electron transfer from QA, the primary bound quinone acceptor, to QB, the ..
  14. ncbi On-line electrochemical oxidation of Cr(III) for the determination of total Cr by flow injection-solid phase spectrophotometry
    Shiro Matsuoka
    Department of Environmental Science, Faculty of Science, Niigata University, Japan
    Anal Sci 22:1519-24. 2006
    ..to the determination of the total Cr concentration by flow injection-solid phase spectrophotometry using diphenylcarbazide as a coloring agent. With the applied potential of 1.35 V (vs. Ag/AgCl) and the flow rate of 0...
  15. ncbi Field method for the determination of insoluble or total hexavalent chromium in workplace air
    Kyle J Hazelwood
    US Department of Health and Human Services, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, Spokane, Washington 99207, USA
    J Occup Environ Hyg 1:613-9. 2004
    ..Portable spectrophotometric measurement of CrVI is then conducted using the 1,5-diphenylcarbazide (DPC) method...
  16. ncbi Speciation of chromium (III) and chromium (VI) by capillary electrophoresis with contactless conductometric detection and dual opposite end injection
    Pavel Kuban
    Department of Chemistry and Biochemistry, Mendel University of Agriculture and Forestry, Brno, Czech Republic
    Electrophoresis 24:1397-403. 2003
    ..were in good agreement with the results obtained by certified differential spectrophotometric method using diphenylcarbazide (CN 83 0520-40) and with the results for the total chromium concentrations determined by electrothermal ..
  17. ncbi Estimation of trace amounts of chromium(III) in multi-vitamin with multi-mineral formulations
    Jolly M Sankalia
    Pharmacy Department, Faculty of Technology and Engineering, The Maharaja Sayajirao University of Baroda, Kalabhavan, Vadodara, Gujarat 390001, India
    Anal Sci 20:1321-5. 2004
    ..fusion with an excess amount of sodium carbonate (method II), followed by the complexation of Cr6+ with 1,5-diphenylcarbazide (DPC) in a mineral acidic solution of pH 1.0 +/- 0.5. The pink-colored complex was estimated at 544 nm...
  18. ncbi A remote in situ monitor based on continuous flow analysis for the quantitation of sub-micromolar levels of hexavalent chromium in natural waters
    Melissa A Singer Pressman
    Department of Chemistry and Biochemistry, University of Wisconsin Milwaukee, 53211, USA
    J Environ Monit 7:809-13. 2005
    ..e. by formation of a complex with 1,5-diphenylcarbazide (DPC). The continuous flow analysis (CFA) design uses narrow conduits (0...
  19. pmc A microfluidic paper-based analytical device for rapid quantification of particulate chromium
    Poomrat Rattanarat
    Electrochemistry and Optical Spectroscopy Research Unit EOSRU, Department of Chemistry, Faculty of Science, Chulalongkorn University, Patumwan, Bangkok 10330, Thailand
    Anal Chim Acta 800:50-5. 2013
    ..After elution to the detection zone, Cr(VI) reacts with 1,5-diphenylcarbazide (1,5-DPC) forming 1,5-diphenylcarbazone (DPCO) and Cr(III)...
  20. ncbi Pachypodol from Croton ciliatoglanduliferus Ort. as water-splitting enzyme inhibitor on thylakoids
    Raquel González-Vázquez
    Department of Biochemistry, Faculty of Chemistry, Autonomous National University of Mexico, Ciudad Universitaria, Delegacion Coyoacan, C P 04510 D F, Mexico
    J Agric Food Chem 54:1217-21. 2006
    ..However, the uncoupled partial reaction from diphenylcarbazide to DCPIP and the uncoupled photosystem I from DCPIPred to MV were not inhibited by 2...
  21. ncbi Biosorption potency of Aspergillus niger for removal of chromium (VI)
    Shaili Srivastava
    School of Environmental Sciences, Jawaharlal Nehru University, New Delhi 110067, India
    Curr Microbiol 53:232-7. 2006
    ..The results of the study indicated removal of more than 75% chromium by Aspergillus niger determined by diphenylcarbazide colorimetric assay and atomic absorption spectrophotometry after 7 days...
  22. ncbi Blocking of electron donation by Mn(II) to Y(Z*) following incubation of Mn-depleted photosystem II membranes with Fe(II) in the light
    Boris K Semin
    Basic Sciences Center, National Renewable Energy Laboratory, Golden, Colorado 80401, USA
    Biochemistry 41:5854-64. 2002
    ..effect was also used to investigate the relationship between the HA(Z) Mn site and the HA sites on PSII for diphenylcarbazide (DPC) and NH2OH oxidation...
  23. doi Application of multiwalled carbon nanotubes modified by diphenylcarbazide for selective solid phase extraction of ultra traces Cd(II) in water samples and food products
    Mohammad Behbahani
    Department of Chemistry, Shahid Beheshti University, G C, Tehran 1983963113, Iran
    Food Chem 141:48-53. 2013
    ..A novel sorbent for separation of cadmium ions was prepared by functionalizing multiwall carbon nanotubes with diphenylcarbazide and underutilised to develop a solid-phase extraction method to separate and concentrate trace amounts of ..
  24. ncbi Speciation Analysis of Ultratrace Chromium in Water by On-line Reaction/Concentration/Separation Method Using a Cation-Exchange Column
    - Sarenqiqige
    Department of Chemistry, Faculty of Sciences, Kyushu University
    Anal Sci 29:823-9. 2013
    ..6 mm i.d., 10 mm) was used as a reaction/concentration/separation medium in an HPLC system. Cr(VI) and 1,5-diphenylcarbazide (DPC) were on-line mixed and reacted in a flow tube...
  25. doi IR spectroscopic analysis of the new organic silver complex C13H13N4OAg
    F El-Kabbany
    Physics Dept, Faculty of Science, Cairo University, Egypt
    Spectrochim Acta A Mol Biomol Spectrosc 111:252-9. 2013
    ..A proposed silver position in the new silver complex DPCAg has been presented...
  26. doi Spectroscopic analyses on ROS generation catalyzed by TiO2, CeO2/TiO2 and Fe2O3/TiO2 under ultrasonic and visible-light irradiation
    Mingming Zou
    College of Chemistry, Liaoning University, Shenyang 110036, PR China
    Spectrochim Acta A Mol Biomol Spectrosc 101:82-90. 2013
    ..It is wished that this paper might offer some important subjects for broadening the applications of sonocatalytic and photocatalytic technologies in future environment treatment...
  27. doi Sensitive determination of chromium (VI) in paint samples using a membrane optode coupled to a multisyringe flow injection system
    W L Castilleja-Rivera
    Universidad Autonoma de Nuevo Leon, UANL, Facultad de Ciencias Quimicas, Cd Universitaria, San Nicolas de los Garza, Nuevo Leon, C P 66451, Mexico
    Talanta 99:730-6. 2012
    ..The detection is based on the color obtained from the reaction of Cr(VI) with 1,5-diphenylcarbazide in the presence of sulfuric acid (H(2)SO(4))...
  28. ncbi Chemically facilitated chromium(VI) transport throughout an anion-exchange membrane application to an optical sensor for chromium(VI) monitoring
    Elianna Castillo
    Analytical Chemistry Department, Universitat de Barcelona, Spain
    J Chromatogr A 963:205-11. 2002
    ..uses the Raipore R1030 membrane as the interface between the sample and the sensor head, which contains 1,5-diphenylcarbazide as spectrophotometric reagent for chromium...
  29. doi Flow injection analysis of trace chromium (VI) in drinking water with a liquid waveguide capillary cell and spectrophotometric detection
    Jian Ma
    State Key Laboratory of Marine Environmental Science, College of Environment and Ecology, Xiamen University, Xiamen, Fujian, China, 361005
    Environ Monit Assess 186:367-73. 2014
    ..The procedure is based on a highly selective reaction between 1, 5-diphenylcarbazide and Cr(VI) under acidic conditions...
  30. ncbi Determination of chromium(III), chromium(VI) and total chromium in chromate and trivalent chromium conversion coatings by electrospray ionization mass spectrometry
    Hiroki Hotta
    Department of Chemistry, Nara University of Education, Takahata cho, Nara 630 8528, Japan
    Talanta 88:533-6. 2012
    ..The proposed methods were applied to analyze chromate and trivalent chromium conversion coatings and gave consistent results with those obtained by a diphenylcarbazide spectrophotometric method for Cr(VI) and ICP-AES for total Cr.
  31. doi Sensitive determination of chromium (VI) based on the inner filter effect of upconversion luminescent nanoparticles (NaYF4:Yb3+, Er3+)
    Hongqi Chen
    College of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiaotong University, 800 Dongchuan Road, Shanghai 200240, PR China
    Talanta 99:404-8. 2012
    ..a pink chelate complex (Cr(III)-diphenylcarbazone), which was generated by the quantitative reaction between diphenylcarbazide (DPC) and Cr(VI) in mineral acid solution...
  32. doi Determination of nanomolar chromate in drinking water with solid phase extraction and a portable spectrophotometer
    Jian Ma
    College of Marine Science, University of South Florida, St Petersburg, FL 33701, United States
    J Hazard Mater 219:247-52. 2012
    ..The measurement chemistry is based on a highly selective reaction between 1,5-diphenylcarbazide (DPC) and chromate under acidic conditions...
  33. ncbi Analysis of interferents by means a D-optimal screening design and calibration using partial least squares regression in the spectrophotometric determination of Cr(VI)
    B D Real
    Department of Chemistry, University of Burgos, Pza Misael Banuelos s n, 09001 Burgos, Spain
    Talanta 71:1599-609. 2007
    ..hexavalent chromium (lambda=543nm) is maximised and its variability minimised using as complexing agent 1,5-diphenylcarbazide in sufficiently acid medium...
  34. doi Chromate removal by yeasts isolated from sediments of a tanning factory and a mine site in Argentina
    Liliana B Villegas
    PROIMI Biotecnología CONICET, Av Belgrano y Pje Caseros, 4000 Tucuman, Argentina
    Biometals 21:591-600. 2008
    ..was estimated by measuring remaining Cr(VI) concentration in the supernatant using the colorimetric 1,5-diphenylcarbazide method and total chromium was determined by flame atomic absorption spectroscopy...
  35. ncbi Study of molecularly imprinted solid-phase extraction of diphenylguanidine and its structural analogs
    Jing Fan
    School of Chemistry and Environmental Science, Key Laboratory of Water Environment and Pollution Control for Yellow and Huai Rivers, Ministry of Education, Henan Normal University, Xinxiang, Henan 453007, PR China
    Anal Chim Acta 639:42-50. 2009
    ..in 9 h, and the DPG could be completely separated from its structural analogs, including diphenylthiourea, diphenylcarbazide and 1,4-diphenylsemicarbazide after washing with 0.5% acetic acid/acetonitrile...
  36. ncbi [Investigation of concentration levels of chromium(VI) in bottled mineral and spring waters by high performance ion chromatography technique with application of postcolumn reaction with 1,5-diphenylcarbazide and VIS detection]
    Dorota Swiecicka
    Zakład Higieny Komunalnej, Narodowy Instytut Zdrowia Publicznego Państwowy Zaklad Higieny, 00 791 Warszawa, ul Chocimska 24
    Rocz Panstw Zakl Hig 59:397-405. 2008
    ..by High Performance Ion Chromatography (HPIC) technique with application of postcolumn reaction with 1,5-diphenylcarbazide and VIS detection...
  37. ncbi Inhibition and uncoupling of photosynthetic electron transport by diterpene lactone amide derivatives
    Pedro A Castelo-Branco
    Departamento de Quimica, ICE, Instituto de Ciencias Biologicas, Universidade Federal de Minas Gerais, Avenida Presidente Antonio Carlos, 6627, Pampulha, CEP 31270 901, Belo Horizonte, Minas Gerais, Brazil
    Z Naturforsch C 63:251-9. 2008
    ..Compound 4 inhibited PSII from water to silicomolybdate (SiMo), but it had no effect on the reaction from diphenylcarbazide (DPC) to DCPIP indicating that its inhibition site was at the water splitting enzyme complex (OEC)...
  38. doi Selective, peroxidase substrate based "signal-on" colorimetric assay for the detection of chromium (VI)
    Jing Li
    State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Graduate School of the Chinese Academy of Sciences, Changchun, Jilin, China
    Anal Chim Acta 630:181-5. 2008
    ..The ABTS was chosen instead of the commonly used 1,5-diphenylcarbazide (DPC) due to its good solubility, stability, sensitivity and low background...
  39. doi Photoconsumption of molecular oxygen on both donor and acceptor sides of photosystem II in Mn-depleted subchloroplast membrane fragments
    Denis V Yanykin
    Institute of Basic Biological Problems, Russian Academy of Sciences, Pushchino, Moscow Region, Russia
    Biochim Biophys Acta 1797:516-23. 2010
    ..gt;100microM) Mn(2+) inhibits the O(2) photoconsumption (like other electron donors: ferrocyanide and diphenylcarbazide)...
  40. doi Hybrid mesoporous materials for on-line preconcentration of Cr(VI) followed by one-step scheme for elution and colorimetric determination at ultratrace levels
    Manuela L Kim
    Departamento de Quimica Inorganica, INQUIMAE, Facultad de Ciencias Exactas y Naturales, Laboratorio de Análisis de Trazas, Universidad de Buenos Aires, Ciudad Universitaria, 1428 Buenos Aires, Argentina
    Talanta 77:1068-74. 2009
    ..Elution and colorimetric detection were carried out with 1-5 diphenylcarbazide (DPC) in sulfuric acid...
  41. doi Evaluation of sequential extraction procedures for soluble and insoluble hexavalent chromium compounds in workplace air samples
    Kevin Ashley
    U S Department of Health and Human Services, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, 4676 Columbia Parkway, Mail Stop R 7, Cincinnati, OH 45226 1998, USA
    J Environ Monit 11:318-25. 2009
    ..sparingly soluble and insoluble Cr(VI) compounds, and analyses were then generally carried out by using the diphenylcarbazide method...
  42. ncbi Carbon nanotube composite coated platinum electrode for detection of Cr(III) in real samples
    Abdolkarim Abbaspour
    Chemistry Department, Shiraz University, Collage of Sciences, Hafezieh, Shiraz 71454, Iran
    Talanta 71:887-92. 2007
    ..the application of composite multi-walled carbon nanotube (MWNT) polyvinylchloride (MWNT-PVC) based on 1,5-diphenylcarbazide as chromium ionophore in potentiometric measurement. The sensor shows a good Nernstian slope of 19.52+/-0...
  43. ncbi Speciation of chromium in natural waters by micropumping multicommutated light emitting diode photometry
    Cherrine K Pires
    Department of Analytical Chemistry, University of Valencia, 50 Dr Moliner Street, 46100 Burjassot Valencia, Spain
    Talanta 72:1370-7. 2007
    ..procedure for the speciation of chromium in natural waters was based on the reaction of Cr (VI) with 1,5-diphenylcarbazide. Cr (III) was previously oxidized to Cr (VI) and determined as the difference between total Cr and Cr (VI)...
  44. ncbi Light-induced changes of C-550 and fluorescence yield in ultraviolet-irradiated chloroplasts at room temperature
    S Katoh
    Department of Biophysics and Biochemistry, Faculty of Science, University of Tokyo, Hongo, Tokyo, Japan
    Biochim Biophys Acta 333:71-84. 1974
    ..DCIP) photoreduction in irradiated chloroplasts was only slightly recovered by addition of diphenylcarbazide, an electron donor for Photosystem II...
  45. ncbi A novel direct-injection photometric detector integrated with solenoid pulse-pump flow system
    Stanislawa Koronkiewicz
    University of Warmia and Mazury, Department of Chemistry, 10 957 Olsztyn, Poland
    Talanta 86:436-41. 2011
    ..as models of photometric reactions: the first - Fe(III) with thiocyanate, and the second - Cr(VI) with 1,5-diphenylcarbazide. To obtain the highest repeatability, the total volume of the solutions should be smaller than the volume of ..
  46. ncbi Adulteration of urine by "Urine Luck"
    A H Wu
    Department of Pathology and Laboratory Medicine, Toxicology Laboratory, Hartford Hospital, 80 Seymour St, Hartford, CT 06102, USA
    Clin Chem 45:1051-7. 1999
    ..In vitro adulterants are used to invalidate assays for urine drugs of abuse. The present study examined the effect of pyridinium chlorochromate (PCC) found in the product "Urine Luck"...
  47. doi Diphenyl carbazide restores electron transport in isolated, illuminated chloroplasts after electron transport from water has been eliminated by mild heat treatment
    Rob L Dean
    Department of Biology, The University of Western Ontario, London, Ontario N6A 5B7, Canada
    Biochem Mol Biol Educ 32:381-9. 2004
    ..transport through chloroplasts to DCPIP is restored in the presence of the artificial electron donor diphenylcarbazide (DPC)...
  48. ncbi Colorimetric determination of copper(II) ions by filtration on sol-gel membrane doped with diphenylcarbazide
    Liang Feng
    Laboratory of Instrumentation and Analytical Chemistry, Key Lab of Separation Science for Analytical Chemistry of CAS, Dalian Institute of Chemical Physics, CAS, Dalian, Liaoning 116023, PR China
    Talanta 84:913-7. 2011
    ..method for the determination of trace copper(II) ions in aqueous solution has been developed using diphenylcarbazide (DPC) immobilized sol-gel matrices...
  49. doi Soret effect and photochemical reaction in liquids with laser-induced local heating
    L C Malacarne
    Departamento de Fisica, Universidade Estadual de Maringa, Maringa PR, Brazil
    Opt Express 19:4047-58. 2011
    ..thermal diffusion, and photochemical reaction contributions in photochemically reacting aqueous Cr(VI)-diphenylcarbazide, Eosin Y, and Eosin Y-doped micellar solutions, are decoupled in this work...
  50. doi IR spectroscopic analysis of polymorphism in C13H14N4O
    F El-Kabbany
    Physics Department, Faculty of Science, Cairo University, Cairo, Egypt
    Spectrochim Acta A Mol Biomol Spectrosc 78:981-8. 2011
    ..The crystal structure was found to be amorphous, monoclinic, tetragonal, orthorhombic and amorphous within a temperature range (30°C-160°C). X-ray diffraction patterns support the results obtained by IR and DSC...
  51. ncbi Determination of Cr(III) and Cr(VI) at sub-ppb levels in water with solid-phase extraction/metal furnace atomic absorption spectrometry
    Tetsuo Inui
    Department of Applied Chemistry, Meiji University, 1 1 1 Higashimita, Tama, Kawasaki 214 8571, Japan
    Anal Sci 26:1093-8. 2010
    ..and Cr(VI) collected were eluted with 40 ml of 3 mol l(-1) nitric acid for Cr(III) and 40 ml of 1 g l(-1) diphenylcarbazide solution for Cr(VI)...
  52. doi Physiological and transcriptional studies of Cr(VI) reduction under aerobic and denitrifying conditions by an aquifer-derived pseudomonad
    Ruyang Han
    Earth Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
    Environ Sci Technol 44:7491-7. 2010
    ..We also report incomplete removal of reduced Cr from solution and on artifacts in the widely used diphenylcarbazide assay for Cr(VI), most notably, its complete inactivation in the presence of millimolar nitrite.
  53. ncbi Electron transfer between exogenous electron donors and reaction center of photosystem 2
    M D Mamedov
    Belozersky Institute of Physico Chemical Biology, Lomonosov Moscow State University, Moscow, 119991, Russia
    Biochemistry (Mosc) 75:579-84. 2010
    Transfer of electrons between artificial electron donors diphenylcarbazide (DPC) and hydroxylamine (NH2OH) and reaction center of manganese-depleted photosystem 2 (PS2) complexes was studied using the direct electrometrical method...
  54. doi Determination of the bioaccessibility of chromium in Glasgow soil and the implications for human health risk assessment
    Andrew Broadway
    School of Geosciences, University of Edinburgh, Edinburgh, EH9 3JN, Scotland, UK
    Sci Total Environ 409:267-77. 2010
    ..in conjunction with the subsequent determination of the bioaccessible Cr by ICP-OES and Cr(VI) by the diphenylcarbazide complexation colorimetric procedure...
  55. doi Photoproduction of catalase-insensitive peroxides on the donor side of manganese-depleted photosystem II: evidence with a specific fluorescent probe
    Sergey A Khorobrykh
    Institute of Basic Biological Problems, Russian Academy of Sciences, Pushchino, Moscow Region 142290, Russia
    Biochemistry 50:10658-65. 2011
    ..PSII membranes than that in the untreated membranes, and it was suppressed by an artificial electron donor (diphenylcarbazide or ferrocyanide) and by the electron transport inhibitor diuron...
  56. doi Investigation of the low-affinity oxidation site for exogenous electron donors in the Mn-depleted photosystem II complexes
    V N Kurashov
    A N Belozersky Institute of Physico Chemical Biology, Moscow State University, Moscow, Russia
    Biochim Biophys Acta 1787:1492-8. 2009
    ..8. Comparison of K(m) for diphenylcarbazide (DPC) oxidation at the LA site and K(d) for A(T) thermoluminescence band suppression by DPC in PSII(-Mn,+Fe) ..
  57. doi Isolation and characterization of thylakoid membranes from the filamentous cyanobacterium Nostoc punctiforme
    Tanai Cardona
    Department of Photochemistry and Molecular Science, Uppsala University, PO Box 523, SE 75120 Uppsala, Sweden
    Physiol Plant 131:622-34. 2007
    ..Electron transfer was found functional in both PSII and PSI. Electron transfer measurements in PSII, using diphenylcarbazide as electron donor and 2,6-dichlorophenolindophenol as electron acceptor, showed that 80% of the PSII centres ..
  58. doi Isolation of a novel chromium(III) binding protein from bovine liver tissue after chromium(VI) exposure
    Ryan L Peterson
    Department of Chemistry, Sonoma State University, 1801 E Cotati Ave, Rohnert Park, CA 94928, USA
    J Inorg Biochem 102:833-41. 2008
    ..Chromium(III) identification was determined by optical spectroscopy and diphenylcarbazide testing. This chromium binding protein has a molecular weight of 15...
  59. ncbi Determination of chromate adulteration of human urine by automated colorimetric and capillary ion electrophoretic analyses
    Kenneth E Ferslew
    Section of Toxicology, Department of Pharmacology, East Tennessee State University, Johnson City, Tennessee 37614, USA
    J Anal Toxicol 27:36-9. 2003
    ..urine specimens suspected of adulteration were analyzed for chromate by colorimetric analysis with diphenylcarbazide. Duplicate aliquots were analyzed for chromate by capillary ion electrophoresis...
  60. ncbi Chromium(III) determination with 1,5-diphenylcarbazide based on the oxidative effect of chlorine radicals generated from CCl4 sonolysis in aqueous solution
    Sivanildo da Silva Borges
    Instituto de Quimica, Universidade Federal da Bahia, Campus de Ondina, 40 170 290 Salvador, Bahia, Brazil
    Anal Sci 18:1361-6. 2002
    ..of Cr(VI) and provides a simple and rapid method for spectrophotometric chromium determination with 1,5-diphenylcarbazide. The key to this method is the production of chlorine radicals when aqueous solution saturated with CCl4 is ..
  61. ncbi Chromium availability in ultramafic soils from New Caledonia
    T Becquer
    IRD, c o Centre de Pédologie Biologique, UPR 6831 du CNRS, associée à l Université Henri Poincaré, Nancy I, BP 5, 54501 Vandoeuvre Les Nancy, France
    Sci Total Environ 301:251-61. 2003
    ..On selected soil solutions, the Cr(VI) was determined colorimetrically with the s-diphenylcarbazide method and total Cr by ICP-AES and speciation of Cr(VI) was performed with the MINEQL+ V 4.5 software...
  62. ncbi Electron donation to the plasma membrane redox system of cultured carrot cells stimulates proton release
    R Barr
    Department of Biological Sciences, Purdue University, West Lafayette, IN 47907
    Biochim Biophys Acta 1017:91-5. 1990
    Membrane-permeable electron donors, duroquinol, diphenylcarbazide, pyrocatechol and tert-octylcatechol, promoted both reduction of an impermeant electron acceptor and proton transport with cultured carrot cells...
  63. ncbi Determination of trace concentrations of hexavalent chromium
    Michael Gardner
    WRc NSF, Marlow, Buckinghamshire, UK
    Analyst 127:153-6. 2002
    ..The technique is based on the reaction of chromium with diphenylcarbazide. The method has been tested on a variety of water samples over an analytical range of 0-2 microg l(-1)...
  64. ncbi Comparative study of effects of artificial electron donors on the AT-band of photosystem II thermoluminescence
    M Y Kultisheva
    School of Biology, Lomonosov Moscow State University, Moscow, 119899, Russia
    Biochemistry (Mosc) 66:715-20. 2001
    ..The effect of Mn(II) and Fe(II) cations as well as the artificial donors diphenylcarbazide and hydroxylamine on the AT-band of thermoluminescence was studied to elucidate the role of the redox-active ..
  65. ncbi Continuous automated measurement of hexavalent chromium in airborne particulate matter
    G Samanta
    Department of Chemistry and Biochemistry, Texas Tech University, Lubbock 79409 1061, USA
    Anal Chem 73:2034-40. 2001
    ..1 M sodium perchlorate and then reacted with sym-1,5-diphenylcarbazide prior to absorbance detection with a light emitting diode-based dedicated flow-through absorbance detector...
  66. ncbi Adsorption mechanism of hexavalent chromium by redox within condensed-tannin gel
    Y Nakano
    Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, Nagatsuta, Midori ku, Yokohama 226 8502, Japan
    Water Res 35:496-500. 2001
    ....
  67. ncbi Determination of total chromium in phosphate rocks by ion chromatography
    A W al-Shawi
    Research Centre, Norsk Hydro ASA, Porsgrunn, Norway
    J Chromatogr A 850:137-41. 1999
    ..ion chromatography to achieve the separation and spectrophotometric post-column reaction for detection with diphenylcarbazide. The relative standard of deviation from analytical data comparison of six different phosphate rocks with ..
  68. ncbi Use of a novel histidyl modifier to probe for residues on Tris-treated photosystem II membrane fragments that may bind functional manganese
    M L Ghirardi
    Basic Sciences Center, National Renewable Energy Laboratory, Golden, Colorado 80401, USA
    Biochemistry 37:13567-74. 1998
    ..Both the "diphenylcarbazide (DPC)-inhibition assay" and single-turnover flash approaches were used...
  69. ncbi Effects of carboxyl amino acid modification on the properties of the high-affinity, manganese-binding site in photosystem II
    M L Ghirardi
    National Renewable Energy Laboratory, Golden, Colorado 80401, USA
    Biochemistry 37:13559-66. 1998
    Our previous work using the "diphenylcarbazide (DPC)-inhibition assay" has identified four amino acid (two carboxyls and two histidyls) ligands to four Mn2+ bound with high affinity on Tris-washed photosystem II (PSII) membrane fragments ..
  70. ncbi On-line preconcentration and determination of chromium(VI) in waters by high-performance liquid chromatography using precolumn complexation with 1,5-diphenylcarbazide
    A Padarauskas
    Department of Analytical Chemistry, Vilnius University, Lithuania
    J Chromatogr A 808:193-9. 1998
    ..Chromate was preconcentrated on a C18 column (50 x 6 mm I.D.) after complexation with diphenylcarbazide (DPC)...
  71. ncbi Photochemical reactions of photosystem II in ethylene glycol
    W Hillier
    Research School of Biological Sciences, Australian National University, Canberra, ACT, Australia
    Biochemistry 36:76-85. 1997
    ..As the EG concentration is increased to 80-100%, there is an irreversible loss of the primary charge separation. The use of EG as a cryoprotectant and as a water-miscible organic solvent for PSII is discussed...
  72. ncbi Electron donation to photosystem II by diphenylcarbazide is inhibited both by the endogenous manganese complex and by exogenous manganese ions
    A Rashid
    Departement de Chimie, Universite du Quebec a Montreal, Canada
    Biochem Cell Biol 73:241-5. 1995
    b>Diphenylcarbazide (DPC) is an efficient electron donor to the inactive oxygen-evolving complex of photosystem II (PSII)...
  73. ncbi Investigation of the amount of dissolved iron in food cooked in Chinese iron pots and estimation of daily iron intake
    D Y Liu
    Sun Yat Sen University of Medical Sciences, Guangzhou, China
    Biomed Environ Sci 3:276-80. 1990
    ..According to the test results, the estimated increase in daily iron intake was about 14.5 mg for adults and 7.4 mg for children when Chinese iron pots were used...
  74. ncbi Kinetics of photoinhibition in hydroxylamine-extracted photosystem II membranes: relevance to photoactivation and sites of electron donation
    D J Blubaugh
    University of Kentucky, Lexington 40546 0091
    Biochemistry 29:5109-18. 1990
    ..the capacity of NH2OH-extracted photosystem II membranes to photooxidize the exogenous electron donors Mn2+, diphenylcarbazide, and I- or to assemble functional water-oxidizing complexes during photoactivation...
  75. ncbi Glycinebetaine protects the D1/D2/Cytb559 complex of photosystem II against photo-induced and heat-induced inactivation
    Suleyman I Allakhverdiev
    Department of Regulation Biology, National Institute for Basic Biology, Okazaki 444 8585, Japan
    J Plant Physiol 160:41-9. 2003
    ..photochemical activity, monitored as the light-induced reduction of pheophytin and electron transport from diphenylcarbazide to 2.6-dichlorophenol-indophenol...
  76. ncbi [Study on the reaction mechanism of the system of Tl(III)-Cu(II)-EDTA-H2O2-DPC]
    Deng ming Sun
    Department of Chemistry, Huaibei Coal Normal College, Huaibei 235000, China
    Guang Pu Xue Yu Guang Pu Fen Xi 23:196-8. 2003
    ..reaction mechanism of the system of thallium (III)-copper(II)-ethylenediaminete-traacetate-hydrogen peroxide-diphenylcarbazide has been studied by spectrophotometric method...
  77. ncbi Solid phase extraction of chromium(VI) from aqueous solutions by adsorption of its diphenylcarbazide complex on a mixed bed adsorbent (acid activated montmorillonite-silica gel) column
    N Rajesh
    Chemistry Group, Birla Institute of Technology and Science, Pilani 333031, India
    Spectrochim Acta A Mol Biomol Spectrosc 69:612-8. 2008
    ..approach has been developed for the solid phase extraction of chromium(VI) based on the adsorption of its diphenylcarbazide complex on a mixture of acid activated montmorillonite (AAM)-silica gel column...
  78. ncbi Spermine and spermidine inhibition of photosystem II: Disassembly of the oxygen evolving complex and consequent perturbation in electron donation from TyrZ to P680+ and the quinone acceptors QA- to QB
    Rémy Beauchemin
    Groupe de Recherche en Biologie Végétale, Universite du Quebec a Trois Rivieres, CP 500, Trois Rivieres Quebec, Canada G9A 5H7
    Biochim Biophys Acta 1767:905-12. 2007
    ..led to the decline of plastoquinone reduction, which was reversed by the artificial electron donor diphenylcarbazide. The above inhibition was due to the loss of the extrinsic polypeptides associated with the oxygen evolving ..
  79. pmc Optical determination of Cr(VI) using regenerable, functionalized sol-gel monoliths
    Nathan A Carrington
    Department of Chemistry, The University of Tennessee, Knoxville, TN 37996 1600, USA
    Anal Chim Acta 581:232-40. 2007
    ..However, by adding a diphenylcarbazide solution to monoliths that have been previously immersed in ppb-level Cr(VI) solutions, a distinct color ..
  80. ncbi Natural diterpenes from Croton ciliatoglanduliferus as photosystem II and photosystem I inhibitors in spinach chloroplasts
    Félix Morales-Flores
    Department of Biochemistry, National Autonomous University of Mexico, Ciudad Universitaria, Delegacion Coyoacan, C P 04510, Mexico, D F, Mexico
    Photosynth Res 91:71-80. 2007
    ..II) partial reaction from water to Na(+) Silicomolibdate (SiMo) and has no effect on partial reaction from diphenylcarbazide (DPC) to 2,6-dichlorophenol indophenol (DCPIP), therefore 1 inhibits at the water splitting enzyme and also ..
  81. ncbi Cr(VI) and Cr(VI)-diphenylcarbazide removal from aqueous solutions using an iron rotating disc electrode
    E Campos
    Universidad Autonoma del Estado de Mexico, Facultad de Quimica, Paseo Colón intersección Paseo Tollocan S N C P 50120, Toluca, Estado de Mexico, Mexico
    Environ Technol 28:1-9. 2007
    This paper presents the results of the investigation on the removal of Cr(VI) and the complex Cr(VI)-diphenylcarbazide from aqueous solutions using an electrochemical reactor, with iron electrodes...
  82. ncbi Evaluation of biosorption potency of Acinetobacter sp. for removal of hexavalent chromium from tannery effluent
    Shaili Srivastava
    School of Environmental Sciences, Jawaharlal Nehru University, New Delhi 110 067, India
    Biodegradation 18:637-46. 2007
    ..The results of the study indicated removal of more than 75% chromium by Acinetobacter sp. determined by diphenylcarbazide colorimetric assay and atomic absorption spectrophotometer after 7 days...
  83. ncbi Chromium(VI) resistance and removal by actinomycete strains isolated from sediments
    Marta A Polti
    Planta Piloto de Procesos Industriales y Microbiológicos PROIMI, CONICET, Av Belgrano y Pasaje Caseros, 4000 Tucuman, Argentina
    Chemosphere 67:660-7. 2007
    ..Chromate-removing activity was estimated using the Cr(VI) specific colorimetric reagent 1,5-diphenylcarbazide. Twenty percent of the isolates from El Cadillal (EC) and 14% of isolates from a copper filter plant (CFP) ..
  84. ncbi Evidence for PSII donor-side damage and photoinhibition induced by cadmium treatment on rice (Oryza sativa L.)
    Cristina Pagliano
    Dipartimento di Scienze dell Ambiente e della Vita, Universita del Piemonte Orientale Amedeo Avogadro, Via Bellini 25G, I 15100 Alessandria, Italy
    J Photochem Photobiol B 84:70-8. 2006
    ..a loss in the capability to reduce 2,6-dichlorophenolindophenol is observed, which is partially restored if diphenylcarbazide is used as an electron donor, indicating that cadmium affects water splitting activity...
  85. ncbi Kinetic and thermodynamic study of the behaviour of diphenylcarbazide in aqueous solution with pH
    P Salinas-Hernández
    Departamento de Quimica, Universidad Autonoma Metropolitana Iztapalapa, San Rafael Atlixco No 186, Col Vicentina, Iztapalapa A P 55 534, 09340 Mexico, D F Mexico
    Spectrochim Acta A Mol Biomol Spectrosc 59:2667-75. 2003
    In order to find out about the chemical behaviour of the diphenylcarbazide (DPCI) in water, kinetic and thermodynamic studies were carried out using UV-Vis spectrophotometry within the 0-12 pH range...
  86. ncbi Effect of exogenous histidine on restoration of electron transfer on the donor side of photosystem II depleted of Mn
    A A Khorobrykh
    Institute of Basic Biological Problems, Russian Academy of Sciences, Pushchino, Moscow Region, 142290, Russia
    Photosynth Res 84:51-6. 2005
    ..The stimulating effect of His is not observed if other electron donors (NH2OH or diphenylcarbazide) are used instead of Mn2+...
  87. ncbi Dual fluorescence of diphenyl carbazide and benzanilide: effect of solvents and pH on electronic spectra
    K Sivakumar
    Department of Chemistry, Annamalai University, Annamalainagar, Tamilnadu 608 002, India
    Spectrochim Acta A Mol Biomol Spectrosc 62:991-9. 2005
    ..pH studies show that both monocations and monoanions are non-fluorescent. The excited state acidity constants determined by fluorimetric titration and Förster cycle methods, have been reported and discussed...
  88. ncbi Preconcentration and separation of Cr(III) and Cr(VI) using sawdust as a sorbent
    Saima Q Memon
    Center of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, Pakistan
    Anal Bioanal Chem 383:619-24. 2005
    ..Metal ion concentration was measured as the Cr(VI)-diphenylcarbazide complex by UV-visible spectroscopy...
  89. ncbi Speciation of chromium by in-capillary derivatization and electrophoretically mediated microanalysis
    F Priego-Capote
    Department of Analytical Chemistry, Annex C 3, Campus of Rabanales, E 14071, Cordoba University, Spain
    J Chromatogr A 1113:244-50. 2006
    ..for chromium speciation analysis--as Cr(III) and Cr(VI)--based on in-capillary derivatization with 1,5-diphenylcarbazide (DPC) is here proposed...
  90. ncbi Determination of dissolved hexavalent chromium in industrial wastewater effluents by ion chromatography and post-column derivatization with diphenylcarbazide
    E J Arar
    Technology Applications, Inc, Cincinnati, OH 45219
    J Chromatogr 546:335-40. 1991
    ..100% recovery of spikes. No oxidation of trivalent chromium to hexavalent chromium was observed at pH 7, 8 or 10 when aqueous samples were spiked with 50 mg/l Cr(III)...
  91. ncbi High-specific binding of Fe(II) at the Mn-binding site in Mn-depleted PSII membranes from spinach
    B K Semin
    Biophysics Department, Biological Faculty, Moscow State University, Russian Federation
    FEBS Lett 375:223-6. 1995
    ..The Fe(II) binding is accompanied by its oxidation. By using reductants it was shown that the high affinity site contains a redox-active component and the reduction of this component totally prevents the binding of Fe(II)...