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Journal articles on the topic 'Complexes de platine'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Castetbon, A., M. Corralès, M. Potin-Gauthier, and M. Astruc. "Etude cinétique de la complexation du cuivre en milieu hydrogénocarbonate par électrochimie." Revue des sciences de l'eau 4, no. 2 (2005): 239–52. http://dx.doi.org/10.7202/705098ar.

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La détermination de la capacité complexante des eaux naturelles est généralement effectuée par titrage ampérométrique du cuivre à pH fixé. Beaucoup, sinon tous les tampons classiques utilisés perturbent les études de spéciation du cuivre par formation de complexes peu stables. Dans ce travail nous nous sommes intéressés à la complexation du cuivre par les ions carbonates généralement présents dans les eaux naturelles. Afin de mener à bien notre étude, nous avons mesuré, dans un milieu synthétique de force ionique et pH contrôlés (KNO3 0,02 M + NaHCO3 2,38.10-3 M) toutes les constantes des divers équilibres prévisibles : produits de solubilité de l'hydroxyde de cuivre Cu(OH)2 et de la malachite Cu2 (OH)2 CO3, constante de formation du carbonate de cuivre dissous CuCO3. A des valeurs de pH suffisamment faibles, la formation du complexe CUOH+ peut étre négligée. Les trois autres réactions ont été suivies race aux mesures combinées, d'une part du pH et, d'autre part, de l'activité en ion Cu2+ libre ou hydraté par ionométrie. Compte tenu des propriétés acido-basiques des diverses espèces, les mesures ont été effectuées à divers pH compris entre 5,5 et 8. Le complexe CuCO30étant l'espèce majoritaire dans ces solutions, sa labilité, pouvant perturber follement les déterminations des capacités complexantes par titrage ampérométrique, a été étudiée par diverses méthodes électrochimiques. La polarographie à tension sinusoïdale surimposée (AC) a indiqué une réduction rapide du cuivre (II) sur électrode de mercure. Deux vagues ont été obtenues en voltampérométrie sur électrode tournante à disque de platine (RDE), ce dédoublement étant d'origine cinétique compte tenu de l'évolution de ces vagues avec la température. Une estimation des valeurs des constantes de vitesse de formation kf et de dissociation kb, a permis de montrer la rapidité des réactions mises en jeu et la labilité du complexe CuCO30.

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2

Courtot, P., R. Pichon, and J. Y. Salaun. "Mise en evidence par RMN dynamique de la mobilite de l'acetone liee par l'oxygene au platine dans les complexes du type trans-[PtCl2Pysubst(acétone)]." Journal of Organometallic Chemistry 286, no. 1 (1985): c17—c21. http://dx.doi.org/10.1016/0022-328x(85)87248-x.

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3

Chaponnier, C., H. L. Yin, and T. P. Stossel. "Reversibility of gelsolin/actin interaction in macrophages. Evidence of Ca2+-dependent and Ca2+-independent pathways." Journal of Experimental Medicine 165, no. 1 (1987): 97–106. http://dx.doi.org/10.1084/jem.165.1.97.

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We have developed an immunoadsorption technique for quantitating EGTA-resistant gelsolin/actin complexes in macrophages extracted with Triton X-100. We report here that the proportion of gelsolin complexed irreversibly to actin is low in freshly harvested macrophages. The amount of the EGTA-resistant complex increases spontaneously during incubation of the cells in suspension at 37 degrees C, or after exposure to the Ca2+ ionophore ionomycin. On the other hand, exposure of suspended cells to the chemotactic oligopeptide, FMLP, or plating of the cells onto tissue culture dishes causes the EGTA-resistant complex to dissociate rapidly. Plating even prevents Ca2+ ionomycin-treated cells with elevated intracellular Ca2+ from inducing this complex. Therefore, our results suggest that macrophages possess a mechanism, not directly involving Ca2+, for dissociating actin/gelsolin EGTA-resistant complexes. This mechanism may be a Ca2+-independent signal for leukocyte activation.

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4

Modugno, M. C., A. A. Wereszczak, and S. B. Waters. "Toward Interpreting Failure in Sintered-Silver Interconnection Systems†." Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2016, HiTEC (2016): 000234–41. http://dx.doi.org/10.4071/2016-hitec-234.

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Abstract The mechanical strength and subsequent reliability of a sintered-silver interconnection “system” is a function of numerous independent parameters, and that “system” is still undergoing process development. Most of those parameters (e.g., choice of plating) are arguably and unfortunately often taken for granted and are independent of the silver's cohesive strength. To explore such effects, shear strength testing and failure analyses were completed on a simple, mock sintered-silver interconnection system consisting of bonding two DBC ceramic substrates. Silver and gold platings were part of the test matrix, as were drying strategies, and the consideration of stencil-printing vs. screen-printing. Shear strength of sintered-silver interconnect systems was found to be insensitive to the choice of plating, drying practice, and printing method provided careful and consistent processing of the sintered-silver are practiced. Lastly, with the examined interconnection systems, it was observed that a maximum shear failure stress of ~ 60 MPa is achievable.

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5

Salishcheva, Olesya, and Alexander Prosekov. "Antimicrobial activity of mono- and polynuclear platinum and palladium complexes." Foods and Raw Materials 8, no. 2 (2020): 298–311. http://dx.doi.org/10.21603/2308-4057-2020-2-298-311.

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Introduction. Infectious diseases remain a serious threat to humanity worldwide as bacterial pathogens grow more diverse. Bacteria, fungi, and parasites develop resistance to clinically approved antimicrobials, which reduces the efficacy of available drugs and treatment measures. As a result, there is an ever growing demand for new highly effective pharmaceuticals. This review describes mono- and polynuclear platinum and palladium complexes with antimicrobial properties. We compared several groups of antibacterial agents: antibiotics, antioxidant biologically active substances, antimicrobial nanoparticles, nanocomposite materials, biopolymers, micellar systems, and plant extracts. Study objects and methods. The review covered relevant articles published in Web of Science, Scopus, and Russian Science Citation Index for the last decade. The list of descriptors included such terms as mononuclear and binuclear complexes of platinum, palladium, and antimicrobial activity. Results and discussion. Chelates of platinum, palladium, silver, iridium, rhodium, ruthenium, cobalt, and nickel are popular therapeutic agents. Their antimicrobial activity against pathogenic microorganisms can be enhanced by increasing their bioavailability. Metalbased drugs facilitate the transport of organic ligands towards the bacterial cell. The nature of the ligand and its coordination change the thermodynamic stability, kinetic lability, and lipophilic properties of the complex, as well as the reactivity of the central atom. Polynuclear platinum and palladium complexes contain two or more bound metal (coordinate) centers. Covalent bonding with bacterial DNA enables them to form a type of DNA adducts, which is completely different from that of mononuclear complexes. Conclusion. Metal-based drugs with functional monodentate ligands exhibit a greater antimicrobial effect compared to free ligands. Poly- and heteronuclear complexes can increase the number of active centers that block the action of bacterial cells. When combined with other antibacterial agents, they provide a synergistic effect, which makes them a promising subject of further research.

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6

Steinborn, Dirk, Michael Gerisch, Frank W. Heinemann та Clemens Bruhn. "Synthesis and structures of platina-β-diketonato complexes of platina-β-diketones; organometallic analogues of platinum blue complexes". Chemical Communications, № 9 (1997): 843–44. http://dx.doi.org/10.1039/a700427c.

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7

Guerra, W., H. Silva, M. V. de Almeida, and A. P. S. Fontes. "Síntese e caracterização de complexos de platina (II) contendo iodeto e derivados do furano como ligantes." Eclética Química 31, no. 1 (2006): 39–43. http://dx.doi.org/10.1590/s0100-46702006000100005.

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Alguns compostos de platina (II), como por exemplo, cisplatina, carboplatina e oxaloplatina, têm sido utilizados como agentes quimioterápicos no tratamento de vários tipos de câncer. Contudo, na tentativa de reduzir a toxicidade e ampliar o espectro de atividade da cisplatina e de seus análogos, milhares de complexos têm sido preparados variando a natureza dos ligantes. Este trabalho descreve a síntese e caracterização de novos complexos de platina, tendo iodeto e derivados do furano como ligantes. Os complexos foram caracterizados por RMN, IV e análise elementar.

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8

Watanabe, Rogério H., Maurício C. Gois, and Benedito S. Lima-Neto. "Organic additive–copper(II) complexes as plating precursors." Surface and Coatings Technology 204, no. 4 (2009): 497–502. http://dx.doi.org/10.1016/j.surfcoat.2009.08.020.

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9

Carmona-Negrón, José A., Mayra E. Cádiz, Curtis E. Moore, Arnold L. Rheingold, and Enrique Meléndez. "New platinum(II) complexes with benzothiazole ligands." Acta Crystallographica Section E Crystallographic Communications 72, no. 3 (2016): 412–16. http://dx.doi.org/10.1107/s2056989016002826.

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Four new platinum(II) complexes, namely tetraethylammonium tribromido(2-methyl-1,3-benzothiazole-κN)platinate(II), [NEt4][PtBr3(C8H7NS)] (1), tetraethylammonium tribromido(6-methoxy-2-methyl-1,3-benzothiazole-κN)platinate(II), [NEt4][PtBr3(C9H9NOS)] (2), tetraethylammonium tribromido(2,5,6-trimethyl-1,3-benzothiazole-κN)platinate(II), [NEt4][PtBr3(C10H11NS)] (3), and tetraethylammonium tribromido(2-methyl-5-nitro-1,3-benzothiazole-κN)platinate(II), [NEt4][PtBr3(C8H6N2O2S)] (4), have been synthesized and structurally characterized by single-crystal X-ray diffraction techniques. These species are precursors of compounds with potential application in cancer chemotherapy. All four platinum(II) complexes adopt the expected square-planar coordination geometry, and the benzothiazole ligand is engaged in bonding to the metal atom through the imine N atom (Pt—N). The Pt—N bond lengths are normal: 2.035 (5), 2.025 (4), 2.027 (5) and 2.041 (4) Å for complexes1,2,3and4, respectively. The benzothiazole ligands are positioned out of the square plane, with dihedral angles ranging from 76.4 (4) to 88.1 (4)°. The NEt4cation in3is disordered with 0.57/0.43 occupancies.

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10

de Oliveira, M. B., J. Miller, R. E. Banks, et al. "New Perfluorophtalate Complexes of Platinum(II) With Chemotherapeutic Potential." Metal-Based Drugs 3, no. 3 (1996): 117–22. http://dx.doi.org/10.1155/mbd.1996.117.

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Two new platinum(II) complexes have been synthesized and their anti-tumour and anti-HIV activities have been evaluated.The new complexes are: (i) cis-tetrafluorophthalate-ammine-morpholine-platinum(II) or MMF3 and (ii) cis-tetrafluorophthalate- ammine-piperidine-platinum(II) or MPF4. They were characterized by elemental analysis, IR spectra and H1 and C13 NMR spectra.They were tested against five human ovarian carcinoma cell lines, viz., CH1, CH1cisR, A2780, A2780cisR and SKOV-3. They were less active than cis-platin and showed cross-resistance with cis-platin in the CH1cisR and A2780cisR acquired resistance lines.They were also tested for possible anti-HIV activity using the HIV-I IIIB virus and C8166 cells, but they were inactive compared with AZT.

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11

Gerisch, Michael, Clemens Bruhn, Andrea Porzel та Dirk Steinborn. "Anionic Tetranuclear Platina-β-diketonates of Platina-β-diketones – Organometallic Analogues of Platinum Blue Complexes". European Journal of Inorganic Chemistry 1998, № 11 (1998): 1655–59. http://dx.doi.org/10.1002/(sici)1099-0682(199811)1998:11<1655::aid-ejic1655>3.0.co;2-7.

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12

Journal, Baghdad Science. "Study of Cytotoxic Effect of Aqueous Extract Fenugreek(Trigonella Foenum Graecum L.S) Seeds and The New Complexes of Rh (?) and Pd (?) on Cancer Cell Lines." Baghdad Science Journal 9, no. 2 (2018): 289–95. http://dx.doi.org/10.21123/bsj.9.2.289-295.

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The effect of the aqueous extract of fenugreek seeds (Trigonella Foenum Graecum L.), Rhodium complex (?) with formula [RhL2CLH2O].1 1/2 ETOH and palladium (?) [pdl2].2ETOH,where L=2-hydroxy phenyl piperonalidine was studied on two cancer cell lines. The first cell line was intestine cancer of female albino mice (L20B), the second one was Rhabdomysarcomas (RD)cell line in human. The activity of the new complexes and the aqueous extract was compared to the well-known anticancer drug (cis-platin) by utilizing the in vitro system. The cell lines were treated with four concentrations of cis-platin 31.25,62.5,125 and 250 ?g/ml for 72 hour exposure time. The same concentrations were used with extract and the new complexes. This study showed that the aqueous extract, Rhodium (?) and palladium (?) complexes have a promising anticancer cell activity as noticed from their effect on inhibition of the cancer cells . Inhibition rate was increased with concentration for the three treatments and it was found to be significant differences (p

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13

Ciftci, Osman, Ilknur Ozdemir, Nigar Vardi, and Nevin Gurbuz. "Novel platinum-N-heterocyclic carbene complex is more cardiotoxic than cis-platin in rats." Human & Experimental Toxicology 30, no. 9 (2010): 1342–49. http://dx.doi.org/10.1177/0960327110390064.

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Cis-platin and other platinum complexes are important chemotherapeutic agents useful in the treatment of several cancers. However, therapeutic usage of cis-platin and other platinum complex are limited by their undesirable side effects including cardiotoxicity. In this context, we aimed to compare the damage caused in heart by cis-platin and novel platinum- N-heterocyclic carbene (Pt-NHC) complex. For this purpose, 35 Sprague-Dawley rats were divided randomly into five equal groups ( n = 7 for each group). Cis-platin and novel Pt-NHC complex were intraperitoneally administered at a single dose of 5 mg/kg and 10 mg/kg and then sacrificed 10 days after this treatment. The heart tissues were taken from all rats for determination of oxidative and myocardial damage. Cis-platin and novel Pt-NHC complex caused oxidative and histological damage in the heart tissue in a dose-dependent manner ( p < 0.05). On the other hand, at the same dose levels, cis-platin caused lower oxidative and histological damage in heart tissue compared to novel Pt-NHC complex. These results suggest that novel Pt-NHC complex is more cardiotoxic than cis-platin.

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14

Stewart, F. F., W. D. Neilsen, R. E. Ekeland, R. D. Larsen, and P. W. Jennings. "Synthesis of 1,3-divinylcyclopentane derivatives from platina(IV)cyclobutane complexes." Organometallics 12, no. 11 (1993): 4585–91. http://dx.doi.org/10.1021/om00035a050.

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15

Kabdaşlı, I., T. Arslan, I. Arslan-Alaton, T. Ölmez-Hancı, and O. Tünay. "Organic matter and heavy metal removals from complexed metal plating effluent by the combined electrocoagulation/Fenton process." Water Science and Technology 61, no. 10 (2010): 2617–24. http://dx.doi.org/10.2166/wst.2010.202.

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In the present study, the treatment of metal plating wastewater containing complexed metals originating from the nickel and zinc plating process by electrocoagulation (EC) using stainless steel electrodes was explored. In order to improve the organic matter removal efficiency, the effect of H2O2 addition to the electrocoagulation (the combined EC/Fenton process) application was investigated. For this purpose, a wide range of H2O2 concentrations varying between 15 and 230 mM was tested. All EC and EC/Fenton processes were performed at an initial pH of 2.6 and at an optimized current density of 22 mA/cm2. Although up to 30 mM H2O2 addition improved the EC process performance in terms of organic matter abatement, the highest COD and TOC removal efficiencies were obtained for the combined EC/Fenton process in the presence of 20 mM H2O2. Nickel and zinc were completely removed for all runs tested in the present study after pH adjustments. At the optimized operation conditions, the combined EC/Fenton process proved to be an alternative treatment method for the improvement of organic matter reduction as well as complexed metal removal from metal plating industry wastewater.

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16

De Simone, Pia. "I riferimenti alle donne nel Timeo di Platone." Revista Archai, no. 30 (November 9, 2020): e03035. http://dx.doi.org/10.14195/1984-249x_30_35.

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Questo lavoro si propone di indagare le occorrenze del lessico femminile, in particolare γυνή e μήτηρ, nel Timeo, per far emergere la posizione di Platone riguardo alle donne che si può evincere dall’ermeneutica dei passi esaminati. Bisogna considerare anche i problemi relativi all’interpretazione degli scritti di Platone, come le strutture argomentative di cui si serve e la complessità di alcuni concetti. Le occorrenze nel Timeo, sebbene non numerose, sono contenutisticamente significative, data la natura di questo dialogo che si propone di identificare la posizione e il ruolo nel cosmo dell’uomo e della sua anima. Nel prologo del Timeo, come anche nella Repubblica, Platone esprime posizioni più aperte riguardo al ruolo sociale delle donne; invece in altri passi, come quelli che trattano della trasmigrazione delle anime, Platone si serve di immagini relative alle donne per aiutare i suoi ascoltatori a comprendere questioni molto complesse. Tali immagini, per essere comprensibili, devono rispecchiare l’idea riguardo alle donne comune al tempo di Platone.

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17

Abdul Hussein, Jasim M., Saadon A. Owda, and Samaá M. Hassan. "Preparation, Characterization of A New Cis – Iodoplatin and Cis - Carboplatin Complexes and Study There Spectral, Physical and Pharmaceutical Properties." JOURNAL OF UNIVERSITY OF BABYLON for Pure and Applied Sciences 27, no. 1 (2019): 146–63. http://dx.doi.org/10.29196/jubpas.v27i1.2086.

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This search includes preparation of new cis–platin, in the form of iodin, and new two cis - carboplatin complexes {cis [Pt(4-aminoantipyrine) (NH3)2]I2 and cis[Pt (aminosalicylicacid) (NH3)2]I}, which used as anti - cancer drugs, they are prepared by using the organic ligands 4-amino salicylic acid and 4-amino anti pyrine. These complexes were characterized by using UV–Vis., FTIR, XRD and 1HNMR spectroscopic techniques . The effect of the concentration and the temperature on the molar electrical conductivity of its solutions were studied. The expiry date (half-life) for the solutions of the complexes in the circumstances at the degrees (350C) and (20 0C) was determined

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18

Makhyoun, Mohamed A., and Raghdaa A. Massoud. "trans Effect of Amino-Chloro-Platinum Complexes and the Reaction of Cisplatin with Guanine: A Theoretical Study." Asian Journal of Chemistry 31, no. 8 (2019): 1683–87. http://dx.doi.org/10.14233/ajchem.2019.21936.

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The reactions of cis-[Pt(NH3)2Cl-cytosine] to form cis and trans dichloro products have been investigated theoretically by the aid of DFT method at the B3LYP/LANL2DZ level. It has been demonstrated by the estimation of activation energies the labile nature of the NH3 in the trans position. Investigation of the reaction between guanine and cis-platin was also performed. The transition states of the first two reactions were found by involving a restrained optimization of the reactant complexes and the product complexes.

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19

Malik, K. M. Abdul, and Paul D. Newman. "Ligand ambivalence in pallada(platina)cyclic complexes of a rigid phosphine." Dalton Transactions, no. 18 (2003): 3516. http://dx.doi.org/10.1039/b307070k.

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20

Steinborn, Dirk, Olaf Gravenhorst, Henrik Junicke, and Frank W. Heinemann. "Synthese und Charakterisierung von kronenetherstabilisierten Platin(IV)- Komplexen mit Aminosäureliganden / Synthesis and Characterization of Amino Acid Complexes of Platinum(IV) Stabilized by Crown Ethers." Zeitschrift für Naturforschung B 53, no. 5-6 (1998): 581–86. http://dx.doi.org/10.1515/znb-1998-5-616.

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Abstract Crown ether complexed pentachloro(aqua)platinic acid, (H3O)[PtCl5(H2O)]·2(18-cr-6)·6H2O (1) reacts with glycine, L-alanine, and DL-2-aminobutyric acid to give cis-[PtCl4(O-glyH)(H2O)]·(18-cr-6)·H2O (4a)1 and cis-[PtCl4(O-amacH)(H2O)]·(18-cr-6) (amacH = alaH 4b, abuH 4c), respectively, as well as (amacH2)2[PtCl6]·2(18-cr-6) (amacH = glyH 5a, alaH 5b, abuH 5c). The crown ether complexed hexachloroplatinic acid, (H3O) 2[PtCl6]·2(18-cr-6) (2), reacts with glycine to afford (glyH2)[PtCl4(N,O-gly)]·2(18-cr-6)·1.25H2O (6).The structures of 4b and 6 were determined by X-ray diffraction. The alanine ligand in 4b is a zwitterion that is coordinated to platinum by one oxygen atom of the carboxylate group only. The other oxygen atom is engaged in a strong hydrogen bond to the ds-coordinated aqua ligand. The glycinato ligand in 6 is N, O-coordinated at platinum forming an anion [PtCl4(N,O-gly)]- . The other oxygen atom of the carboxylate group is involved in a strong hydrogen bridge to the cation (glyH2)+. In both complexes hydrogen bridges are formed between the -N+H3 and -NH2 groups of the amino acid ligands and the oxygen atoms of the crown ether molecules.

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21

Barbiéri, Roberto Santos, Carlos Roberto Bellato, and Antonio Carlos Massabni. "Síntese e reatividade de complexos platina-trifenilestibina: uma revisão bibliográfica." Química Nova 29, no. 4 (2006): 761–64. http://dx.doi.org/10.1590/s0100-40422006000400024.

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22

ONO, Yasushi, Yoshiji YAMASHITA, and Morihiro YASUDA. "Electroless Ni-B Plating in the Tartrate-complexed Ni Solution." Journal of the Surface Finishing Society of Japan 53, no. 1 (2002): 65–70. http://dx.doi.org/10.4139/sfj.53.65.

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23

Gerisch, Michael, Clemens Bruhn та Dirk Steinborn. "A cationic tetranuclear platina-β-diketonate complex of a platina-β-diketone – an organometallic analogue of platinum blue complexes". Polyhedron 18, № 14 (1999): 1953–56. http://dx.doi.org/10.1016/s0277-5387(99)00069-8.

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24

Cho, Keunchang, Yong Soon Jang, Myoung-Seon Gong, Kwan Kim, and Sang-Woo Joo. "Determination of Cyanide Species in Silver and Gold Plating Solutions by Raman Spectroscopy." Applied Spectroscopy 56, no. 9 (2002): 1147–51. http://dx.doi.org/10.1366/000370202760295377.

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Raman spectra of silver and gold cyanide complexes have been investigated in order to determine the speciation of aqueous plating solutions. We have examined the ionic species in the concentration ranges of 0.003 ∼ 0.5 M for the metals and 0.1 ∼ 2.5 M for the cyanide ion. When the initial concentration of [Ag(CN)2]− was below ∼0.1 M, [Ag(CN)4]3– did not appear prominent even at high CN−/Ag(I) ratios of 3 ∼ 10, differing from the case of previous infrared measurements. Concentrations of the metal cyanide complexes and CN− ion as low as 0.001 ∼ 0.01 M could be determined with an error of less than ∼3% from the analysis of Raman peak areas.

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25

Afonin, E. G. "Methods for preparing nickel plating solutions containing nickel(+2) 1-hydroxyethane-1,1-di-phosphonate complexes." Radio industry 29, no. 1 (2019): 29–36. http://dx.doi.org/10.21778/2413-9599-2019-29-1-29-36.

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The purpose of the work is to review the methods known from the literature and to propose the new methods for preparing the nickel electroplating and nickel electroless plating solutions containing nickel(+2) complexes with 1-hydroxyethane-1,1-diphosphonic acid CH3C(OH)(PO3H2)2 of various proton and stoichiometric composition which allow to obtain high quality nickel coatings. The classification of preparing methods on the basis of chemical reactions nature is given. The advantages and the limitations of each method are discussed. The starting materials are water soluble and water insoluble nickel(+2) salts, nickel(+2) 1-hydroxyethane-1,1-diphosphonates, 1-hydroxyethane-1,1-diphosphonic acid, sodium or potassium 1-hydroxyethane-1,1-diphosphonates. The conclusion is that the methods which base on the use of nickel(+2) bis(1-hydroxyethane-1,1-diphosphonate(1-)) tetrahydrate are the most versatile and convenient. The examples of the preparation of 1-hydroxyethane-1,1-diphosphonate solutions for nickel plating without other substances or with the second ligand (ammonia, ethylenediamine, triethanolamine and others) are given.

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26

STEWART, F. F., W. D. NEILSEN, R. E. EKELAND, R. D. LARSEN, and P. W. JENNINGS. "ChemInform Abstract: Synthesis of 1,3-Divinylcyclopentane Derivatives from Platina(IV) cyclobutane Complexes." ChemInform 25, no. 8 (2010): no. http://dx.doi.org/10.1002/chin.199408129.

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27

Sebald, Angelika, and Bernd Wrackmeyer. "Monomere [Bis(diphenylphosphino)methan]platin-acetylid-Komplexe [1] / Monomeric [Bis(diphenylphosphino)methan]platinum Acetylide Complexes [1]." Zeitschrift für Naturforschung B 40, no. 11 (1985): 1481–84. http://dx.doi.org/10.1515/znb-1985-1110.

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The reaction of [dppmPtCl2] (dppm = bis(diphenylphosphino)methane) with bis(alkynyl)-dimethylstannanes leads to monomeric complexes [dppmPt(C≡C−R)2], 2 (R = H, CH3, C4H9t, C6H5) in >90% yield. Rearrangement of 2 into the dimeric complexes 3, trans,trans- [Pt2(C≡C−R)4(dppm)2] is catalyzed by traces of various phosphanes. All products are characterized by 1H, 13C, 31P and 195Pt NMR spectroscopy.

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28

Cavicchioli, M., Filipe Boccato Payolla, and Antonio Carlos Massabni. "Síntese de novos complexos de platina(II) de interesse biológico. Um novo complexo dinuclear de platina(II) com 5-fluorouracil." Eclética Química Journal 40, no. 1 (2015): 180. http://dx.doi.org/10.26850/1678-4618eqj.v40.1.2015.p180-185.

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Many strategies have been used for the treatment of cancer and, following the success of cisplatin and carboplatin, metal complexes have been excelled and showed efficiency on the treatment of many types of cancer. The use of ligands that already have antitumor activity allows an increase on the drugs efficiency. In this work, synthesis of obtained a binuclear compound of platinum and 5-fluorouracil is described. The compound was characterized by elemental analysis and the results show a molar ratio of 2:1 (M:L). The IR spectra shows the complexation of the ligands to the metal by the N atoms of the ligand. On the free ligand spectrum, it is possible to note the N-H bond stretch at 3160 cm-1. The displacements of the frequencies of the C=O groups on the region of 1720cm-1 and 1652cm-1 to 1575cm-1 and 1504cm-1, respectively, occur because of the coordination of the metal to the N neighbour atoms of the ligand.

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Joi, Aniruddha, Rohan Akolkar, and Uziel Landau. "Additives for Bottom-up Copper Plating from an Alkaline Complexed Electrolyte." Journal of The Electrochemical Society 160, no. 12 (2013): D3001—D3003. http://dx.doi.org/10.1149/2.001312jes.

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Bhat, Satish S., Vidyanand K. Revankar, Vijay Kumbar, Kishore Bhat, and Vitthal A. Kawade. "Synthesis, crystal structure and biological properties of a cis-dichloridobis(diimine)copper(II) complex." Acta Crystallographica Section C Structural Chemistry 74, no. 2 (2018): 146–51. http://dx.doi.org/10.1107/s2053229617018551.

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The mechanisms of interaction of inorganic complexes with DNA are important in the design and development of new metal-based drug molecules. The limitations of cis-platin have encouraged the design and development of new metal-based target-specific anticancer drugs having reduced side effects. The complex cis-dichloridobis(1,2,5-thiadiazolo[3,4-f][1,10]phenanthroline-κ2 N 1,N 10)copper(II), [CuCl2(C12H6N4S)2], has been synthesized and characterized. The complex crystallizes in the monoclinic space group C2/c. The covalent binding of the complex with DNA was studied by absorption spectroscopy. The anticancer activity of the complex on the Human Lung Carcinoma (A549) cell line was investigated by MTT assay. The complex exhibits higher toxicity than cis-platin and induces an apoptotic mode of cell death.

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Thi Thanh Chi, Nguyen, Nguyen Thi My Hoa, and Truong Thi Cam Mai. "ANTI-MICROBIAL ACTIVITIES OF TWO PLATINUM(II) COMPLEXES BEARING ETHYL EUGENOXYACETATE AND SYNTHESIS, STRUCTURE OF [PtCl(ETHYL EUGENOXYACETATE-1H)(MORPHOLINE)]." Journal of Science, Natural Science 61, no. 9 (2016): 60–67. http://dx.doi.org/10.18173/2354-1059.2016-0057.

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Rathod, Manik, and Vijaykumar L. Chavan. "Synthesis, Characterization and Biological Application of Rhodium, Platinum and Gold Metal Complexes Derived from Bidentate Schiff Base Ligand (Research Article)." International Journal of Pharmacy and Biological Sciences 11, no. 1 (2021): 38–47. http://dx.doi.org/10.21276/ijpbs.2021.11.1.5.

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Rathod, Manik, and Vijaykumar L. Chavan. "Antimicrobial Study of Synthesized and Characterized Rhodium, Platinum and Gold Metal Complexes Derived from Bidentate Schiff Base Ligand. (Research Article)." International Journal of Pharmacy and Biological Sciences 11, no. 1 (2021): 77–86. http://dx.doi.org/10.21276/ijpbs.2021.11.1.10.

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Rollick, Natalie C., Naomi E. Gadinsky, Craig E. Klinger, et al. "The effects of dual plating on the vascularity of the distal femur." Bone & Joint Journal 102-B, no. 4 (2020): 530–38. http://dx.doi.org/10.1302/0301-620x.102b4.bjj-2019-1776.

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Aims Dual plating of distal femoral fractures with medial and lateral implants has been performed to improve construct mechanics and alignment, in cases where isolated lateral plating would be insufficient. This may potentially compromise vascularity, paradoxically impairing healing. This study investigates effects of single versus dual plating on distal femoral vascularity. Methods A total of eight cadaveric lower limb pairs were arbitrarily assigned to either 1) isolated lateral plating, or 2) lateral and medial plating of the distal femur, with four specimens per group. Contralateral limbs served as matched controls. Pre- and post-contrast MRI was performed to quantify signal intensity enhancement in the distal femur. Further evaluation of intraosseous vascularity was done with barium sulphate infusion with CT scan imaging. Specimens were then injected with latex medium and dissection was completed to assess extraosseous vasculature. Results Quantitative MRI revealed a mean reduction of 21.2% (SD 1.3%) of arterial contribution in the lateral plating group and 25.4% (SD 3.2%) in the dual plating group (p = 0.051); representing a mean decrease in arterial contribution of 4.2%. The only significant difference found between both experimental groups was regionally, at the lateral aspect of the distal femur with a mean drop in arterial contribution in the lateral plating group of 18.9% (SD 2.6%) versus 24.0% (SD 3.2%) in the dual plating group (p = 0.048), representing a mean decrease in arterial contribution of 5.1%. Gross dissection revealed complete destruction of periosteal vessels underneath either medial or lateral plates in both groups. The network of genicular branches contributing to the posterior and distal femoral condyles was preserved in all specimens. A medial vascular pedicle was found dividing from the superficial femoral artery at a mean 12.7 cm (SD 1.7) proximal to the medial epicondyle and was undisrupted in the dual plating group. Conclusion Lateral locking-plate application resulted in mean 21.2% reduction in distal femur vascularity. Addition of medial plates did not further markedly decrease vascularity. As such, the majority of the vascular insult occurred with lateral plating alone. Supplemental medially based fixation did not lead to marked devascularization of the distal femur, and should therefore be considered in the setting of comminution and poor bone stock in distal femoral fractures. Further clinical research is required to confirm the results of this study. Cite this article: Bone Joint J 2020;102-B(4):530–538.

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Kimura, Mutsumi, Hiroki Yamagiwa, Daisuke Asakawa, et al. "Site-Selective Electroless Nickel Plating on Patterned Thin Films of Macromolecular Metal Complexes." ACS Applied Materials & Interfaces 2, no. 12 (2010): 3714–17. http://dx.doi.org/10.1021/am100853t.

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Werner, Michael, Clemens Bruhn та Dirk Steinborn. "From platina-β-diketones to diacetylplatinum(II) complexes – Synthesis, characterization and structural features". Journal of Organometallic Chemistry 693, № 13 (2008): 2369–76. http://dx.doi.org/10.1016/j.jorganchem.2008.04.016.

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Lu, Guo-Liang, Cheuk-Lam Ho, Qiwei Wang, et al. "Synthesis and Characterization of Some Metal Complexes of 4,5-Diazafluoren-9-one and their Biological Effects on Human Carcinoma Cells." Australian Journal of Chemistry 61, no. 12 (2008): 975. http://dx.doi.org/10.1071/ch08342.

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Three new transition metal complexes of 4,5-diazafluoren-9-one, [(DAFO)PdCl2], [(DAFO)PtCl2], and [(DAFO)ZnCl2], were prepared in good yields by the reactions between appropriate metal chloride precursors and 4,5-diazafluoren-9-one under ambient conditions. The structures of these metal complexes were established by spectroscopic (Fourier-transform IR, NMR, and fast-atom bombardment mass spectrometry) techniques. The possible biological activity of these compounds on three human cancer cell lines including Hep3B, MDAMB-231, and SKHep-1 was investigated. The results obtained showed that both zinc- and platinum-containing compounds exhibit a similar growth inhibitory effect on these three cancer cell lines when compared with the prototypical cis-platin. In contrast, the corresponding palladium congener is virtually biologically inactive in these trials.

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Gerisch, Michael, Frank W. Heinemann, Clemens Bruhn, Joachim Scholz та Dirk Steinborn. "Reactivity of Dinuclear Platina-β-diketones toward Phosphines and Pyridines: Formation of Mononuclear Platina-β-diketones and Acyl(chloro)platinum(II) Complexes†". Organometallics 18, № 4 (1999): 564–72. http://dx.doi.org/10.1021/om980793m.

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Danenberg, Peter V., Luke C. C. Shea, Kathleen D. Danenberg, and Tetsuro Horikoshi. "Inactivation of Tetrahymena rRNA self-splicing byc/s-platin proceeds through dissociable complexes." Nucleic Acids Research 19, no. 11 (1991): 3123–28. http://dx.doi.org/10.1093/nar/19.11.3123.

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Akbarzadeh, Samad, Fatemeh Ebrahimi, Zeinab Faghih, Ali Movahed, and Zahra Faghih. "Cytotoxic Effect of Two Novel Platinum (II) Complexes on Breast Cancer: An in Vitro Study." Asian Pacific Journal of Cancer Biology 3, no. 2 (2018): 47–50. http://dx.doi.org/10.31557/apjcb.2018.3.2.47-50.

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Background: With 1.36 million new cases in worldwide each year, breast cancer (BC) is the most common malignancy in the female. Among numerous chemotherapy drugs which are widely used for cancer therapy, platinum compounds are the most persuasive ones although challenges remain with the clinical use of them due to their side effects as well as intrinsic and acquired resistance. In the attempt to combat drug resistance, reduce cytotoxic side effects or find the drug for particular forms of cancer, over the years, thousands of other platinum (Pt) compounds i.e. carboplatin and oxaliplatin have been developed.Material and Methods: In this regard, we previously described the synthesis of some new platinum (II) derivatives with potential anti-cancer activities against BC. Here, we chose two of the best platinum(II) compounds, 3b and 2a, to further evaluate their cytotoxic activities against human BC cell lines, SKBR3, MCF-7, MDA-MB-231, and MBA-MB-468, with different molecular subtypes using a colorimetric MTT cytotoxic assay. Their cytotoxic activities were compared to cis-platin as a positive control. Results: Our result showed that both compounds had better cytotoxic effect against BC cell lines than cis-platin in particular in the case of triple-negative subtype.Conclusion: These results suggest these compounds as potentially valuable agents for the treatment of breast cancer patients.

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Ling, DC, DJ Luckett, NL Darvey, and XL Ding. "A cost-based index of anther culture response in diverse wheat-breeding germplasm." Australian Journal of Experimental Agriculture 35, no. 3 (1995): 395. http://dx.doi.org/10.1071/ea9950395.

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Anther culture response in a diverse range of Australian wheat-breeding genotypes was tested and expressed as a 'culturability index' based on the actual costs of the various laboratory procedures. When the delay from harvest to plating was up to 12 h, the use of low dose gamma irradiation did not increase the anther culture response in this array of genotypes. This is in contrast to previous findings for which spike harvesting, irradiation, and plating was completed within 3 h and the irradiation treatment increased the anther culture response. Internal contamination of immature spike explants with Fusarium poae caused significant loss of cultures and may be a persistent problem for cereal anther culture. For the genotypes producing green regenerants, costs ranged from $A1.40 to $85/green regenerant.

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Islam, Md Ashraful, Md Abdur Rashid, Md Rafiqul Islam, Md Hafizur Rahman Milon, and Md Kaiser Mahmud. "Management of Fractures Shaft of Tibia in Adult Interlocking Nailing Versus Plating in: A Comparative Study." KYAMC Journal 10, no. 2 (2019): 99–105. http://dx.doi.org/10.3329/kyamcj.v10i2.42788.

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Background: Tibial shaft fractures are the commonest long bone fractures in adults, most commonly managed by intramedullary interlocking nailing. However, several meta-analysis show that locking plate osteosynthesis is equally effective in managing tibial diaphyseal fractures and are associated with less number of complications. Aim: To compare the results of fixation of tibial fractures followingplating and nailing in terms of union, patient satisfaction and complications. Materials and Methods: Khwaja Yunus Ali Medical College and Hospital based non randomized clinical trial was performed from September 2014 to August 2017 where closed or open diaphyseal or metaphyseo- diaphyseal fractures of the tibia (closed or open Gustilo Anderson type 1 through 3B) were included. Simple sequential allocation was used for allotting the patients to two groups, one for interlocking nailing and other for plating. The patients were followed up for clinical, radiographic and functional results. Results: Forty patients with 41 involved limbs completed followup for one year. in our study was 19.55±0.69 weeks in case of interlocking nailing and 20.38±1.39 weeks in case of plating and there was no statistically significant difference between the two. Conclusion: There was no difference between the twomodalities in terms of fracture union. Complications were lesser but more serious in case of plating. Patient satisfaction was more with plating. KYAMC Journal Vol. 10, No.-2, July 2019, Page 99-105

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de Virgilio, Maddalena, William B. Kiosses та Sanford J. Shattil. "Proximal, selective, and dynamic interactions between integrin αIIbβ3 and protein tyrosine kinases in living cells". Journal of Cell Biology 165, № 3 (2004): 305–11. http://dx.doi.org/10.1083/jcb.200402064.

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Stable platelet aggregation, adhesion, and spreading during hemostasis are promoted by outside-in αIIbβ3 signals that feature rapid activation of c-Src and Syk, delayed activation of FAK, and cytoskeletal reorganization. To evaluate these αIIbβ3–tyrosine kinase interactions at nanometer proximity in living cells, we monitored bioluminescence resonance energy transfer between GFP and Renilla luciferase chimeras and bimolecular fluorescence complementation between YFP half-molecule chimeras. These techniques revealed that αIIbβ3 interacts with c-Src at the periphery of nonadherent CHO cells. After plating cells on fibrinogen, complexes of αIIbβ3–c-Src, αIIbβ3–Syk, and c-Src–Syk are observed in membrane ruffles and focal complexes, and the interactions involving Syk require Src activity. In contrast, FAK interacts with αIIbβ3 and c-Src, but not with Syk, in focal complexes and adhesions. All of these interactions require the integrin β3 cytoplasmic tail. Thus, αIIbβ3 interacts proximally, if not directly, with tyrosine kinases in a coordinated, selective, and dynamic manner during sequential phases of αIIbβ3 signaling to the actin cytoskeleton.

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44

Van Tan, Le, Tran Quang Hieu, and Nguyen Van Cuong. "Spectrophotometric Determination of Cr(III) and Pb(II) Using Their Complexes with 5,11,17,23-Tetra[(2-ethyl acetoethoxyphenyl)(azo)phenyl]calix[4]arene." Journal of Analytical Methods in Chemistry 2015 (2015): 1–7. http://dx.doi.org/10.1155/2015/860649.

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New complexes of 5,11,17,23-tetra[(2-ethyl acetoethoxyphenyl)(azo)phenyl]calix[4]arene (TEAC) with Pb(II) and Cr(III) were prepared in basic solution with a mixture of MeOH and H2O as solvent. The ratio of TEAC and metal ion in complexes was found to be 1 : 1 under investigated condition. The complex formation constants (based on Benesi-Hildebrand method) for TEAC-Pb(II) and TEAC-Cr(III) were 4.03 × 104and 1.2 × 104, respectively. Additionally, the molar extinction coefficients were 5 × 104and 1.42 × 104for TEAC-Pb(II) and TEAC-Cr(III), respectively. The H-Point Standard Addition Method (HPSAM) has been applied for simultaneous determination of complexes formation of Cr(III)/Pb(II) and TEAC with concentration from 2 : 1 to 1 : 20 (w/w). The proposed method was successfully utilized to invest lead and chromium contents in plating wastewater samples. The results for several analyzed samples were found to be in satisfied agreement with those acquired by using the inductively coupled plasma mass spectrometry (ICP-MS) technique.

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Ehrenstorfer-Schäfers, Eva, Helmut Hartl, and Wolfgang Beck. "Bildung wasserlöslicher Histidin-Platin- Komplexe aus metallischem Platin und Histidin / Formation of Water Soluble Histidine Platinum Complexes from Metallic Platinum and Histidine." Zeitschrift für Naturforschung B 43, no. 4 (1988): 499–500. http://dx.doi.org/10.1515/znb-1988-0421.

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AbstractMetallic Platinum dissolves under oxygen atmosphere in aqueous histidine solution. About 0.1 to 0.3 μmol of a water soluble histidine platinum complex per ml solution have been found by atomic absorption spectroscopy.

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Rashidi, Mehdi, та Badri Z. Momeni. "ω-Monobromoalkyl platina(IV)cyclopentane complexes: synthesis, characterization and kinetic studies of the formation". Journal of Organometallic Chemistry 574, № 2 (1999): 286–93. http://dx.doi.org/10.1016/s0022-328x(98)00907-3.

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Vinokurov, E. G., A. V. Demidov, and V. V. Bondar'. "Logistic Model of Ligand Selection for Chromium-Plating Electrolytes Based on Cr(III) Complexes." Russian Journal of Coordination Chemistry 30, no. 11 (2004): 774–80. http://dx.doi.org/10.1023/b:ruco.0000047463.33590.33.

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Steinborn, Dirk, Tobias Hoffmann, Michael Gerisch та ін. "On the Reactivity of Platina-β-diketones - Synthesis and Characterization of Acylplatinum(II) Complexes". Zeitschrift für anorganische und allgemeine Chemie 626, № 3 (2000): 661–66. http://dx.doi.org/10.1002/(sici)1521-3749(200003)626:3<661::aid-zaac661>3.0.co;2-4.

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Vinokurov, E. G., A. V. Demidov, and V. V. Bondar? "Physicochemical model for choosing complexes for chromium-plating solutions based on Cr(III) compounds." Russian Journal of Coordination Chemistry 31, no. 1 (2005): 14–18. http://dx.doi.org/10.1007/s11173-005-0027-0.

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50

Tamašauskaitė-Tamašiūnaitė, Loreta, Aldona Jagminienė, Ina Stankevičienė, Karolis Ratautas, Gediminas Račiukaitis, and Eugenijus Norkus. "Enhancing Effect of Chloride Ions on the Autocatalytic Process of Ag(I) Reduction by Co(II) Complexes." Materials 13, no. 20 (2020): 4556. http://dx.doi.org/10.3390/ma13204556.

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In this work, the possibilities of increasing the rate of electroless silver plating without a rise in the concentration of reactants or elevation of temperature were studied. The effect of halide additive, namely chloride ions, on the rate of electroless silver deposition was investigated, using conventional chemical kinetics and electrochemical techniques. It was found that the deposition rate of electroless silver increased 2–3 times in the presence of 10–20 mM of chlorides, preserving sufficient stability of the solution.

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