Search Results

You are looking at 11 - 20 of 36 items for :

  • "benzothiazoles" x
  • Refine by Access: All Content x
Clear All
Journal of Thermal Analysis and Calorimetry
Authors: A. A. M. Aly, A. S. A. Zidan, and A. I. El-Said

The reactions of bis(2-mercaptobenzothiazolato)nickel(H) with some azoles and morpholine afforded the corresponding mixed ligand complexes. The studied azoles were 2-aminothiazole, benzothiazole, benzoxazole, 2-methylbenzoxazole and 2-mercapto-benzoxazole. The formation of new compounds was confirmed from the spectral data. The thermal decompositions of the compounds together with some related compounds reported in the literature, for comparison, were studied. The activation energies and other kinetic parameters were calculated from the Coats-Redfern and Horowitz-Metzger equations.

Restricted access

Abstract  

The semireduced form (Adr) of the anti-tumour agent adriamycin is implicated in cardiotoxic side effects. Adr, prepared by reduction with e aq and CO 2 , has pK values at 2.9 and 9.2. In the pH range 6–11, Adr is relatively stable, existing in equilibrium with Adr and the hydroquinone, the latter subsequently losing the sugar within 100 ms. The E 7 1 of Adrais –328 mV, so at equilibrium the reaction O 2 + AdrO2 + Adr lies well over to the left. The relative yields of O2(1 g) formed via energy transfer from triplet excited components of haematoporphyrin derivative, the drug used in photodynamic therapy, have been measured by observations of the phosphorescence emission at 1270 nm. The measurements suggest that the most active component, dihaematoporphyrin ether or ester, is comparatively ineffective itself photodynamically, but may serve as a pool for the more effective haematoporphyrin and hydroxyethylvinylporphyrin to act inside the cancer cell. One-electron oxidation of dopa, through N 3 . or photoionization, leads to the melanin precursor dopachrome via dopasemiquinone and dopaquinone. The latter reacts with cysteine to form cysteinyldopa, a marker for malignant melanoma metastasis. N 3 . —initiated oxidation of cysteinyldopa proceeds via a different mechanism involving the corresponding semiquinone, quinone and a quinone-imine which rearranges to a more stable benzothiazole.

Restricted access
Acta Biologica Hungarica
Authors: O. Temiz-Arpaci, B. Eylem Cifcioglu Goztepe, Fatma Kaynak-Onurdag, Selda Ozgen, Fatma Senol, and I. Erdogan Orhan

Akbay, A., Oren, I., Temiz-Arpacı, O., Akı-Şener, E., Yalçin, I. (2003) Synthesis and HIV-1 Reverse Transcriptase Inhibitor activity of some 2,5,6-substituted benzoxazole, benzimidazole, benzothiazole and oxazolo(4,5-b)pyridine derivatives. Arzneim

Restricted access

dilute ammoniacal media using N -cyclohexyl-benzothiazole-sulfenamide . Corros Sci. 47 : 1119 – 1127 10.1016/j.corsci.2004.06.018 . 3. Subramania , A , Kalyana Sundaram , NT , Sathiya

Restricted access

benzothiazole between poplar ( Populus simonii × P. pyramidalis ‘Opera 8277’) cuttings. Trees , 23 , 1003–1011. Su X. Evidence for the signaling role of methyl jasmonate, methyl

Restricted access

Thermal properties of oxide glasses

Part IV. Induction period of crystallization as a criterion of thermal stability of M2OSiO2 (M = Li, Na) glass systems against crystallization

Journal of Thermal Analysis and Calorimetry
Authors: S. Lendvayová, K. Moricová, E. Jóna, J. Kraxner, M. Loduhová, V. Pavlík, J. Pagáčová, and S. C. Mojumdar

benzothiazole adducts . J Therm Anal Calorim 100 : 769 – 777 10.1007/s10973-010-0769-x . 23. Madhurambal , G , Ramasamy , P , Anbusrinivasan , P , Vasudevan , G , Kavitha , S , Mojumdar

Restricted access

benzothiazoles ” K. Lövei , I. Greiner , J. Éles , Á. Szigetvári, M. Dékány , S. Lévai , Z. Novák , G. I. Túrós Journal of Flow Chemistry 2015 , 5 , 74 – 81 “ Two-stage flow synthesis of coumarin via O-acetylation of

Restricted access

. Pajtášová , M , Ondrušová , D , Jóna , E , Mojumdar , SC , Ľalíková , S , Bazyláková , T , Gregor , M 2010 Spectral and thermal characteristics of copper(II) carboxylates with fatty acid chains and their benzothiazole adducts . J Therm Anal

Restricted access

. Pajtášová , M , Ondrušová , D , Jóna , E , Mojumdar , SC , Ľalíková , S , Bazyláková , T , Gregor , M 2010 Spectral and thermal characteristics of copper(II) carboxylates with fatty acid chains and their benzothiazole adducts . J Therm Anal

Restricted access

7 15 Benhanou, N. and Belanger, R. (1998): Benzothiazole-mediated induced resistance to Fusarium oxysporum f. sp. radicis-lycopersici in tomato. Plant Physiol. 118, 1203

Restricted access