scholarly journals Synthesis and EPR Studies of Copper Metal Complexes of Dyes Derived from Remazol Red B, Procino Yellow, Fast Green FCF, Brilliant Cresyl Blue with Copper Acetate Monohydrate

2011 ◽  
Vol 8 (s1) ◽  
pp. S211-S224 ◽  
Author(s):  
V. Dharmalingam ◽  
A. K. Ramasamy ◽  
V. Balasuramanian

The synthesis and characterization of four new solid dye complexes, CuL2(L= 2-[2-methoxy-5-(propane-1-sulfonyl)-phenyl azo]-naphthalen-1-ol, 5-{[3-(4,6-dihydroxy-[1,3,5]tri azine-2-ylamino)-phenyl]-hydrazones}-1-ethyl-4-methyl-2,6-dioxo-1,2,5,6-tetrahydro-pyridine-3-carboxylic acid diethylamide, 4-{bis-[4-(benzyl-ethyl-amino)-phenyl]-methyl}-phenol and 7-imino-4-methyl-7H-phenoxazine-1,3-diamine) is reported. The mode for ligand coordination has been determined by IR and EPR spectra. The carboxyl and amino group of dyes coordinates to the Cu(II) atom as a unidentate or as a chelating ligand.

2003 ◽  
Vol 43 (2) ◽  
pp. 179-187 ◽  
Author(s):  
Elisabeth Rodríguez-González ◽  
Manel López-Bejar ◽  
Dolors Izquierdo ◽  
María-Teresa Paramio

2021 ◽  
Vol 14 (2) ◽  
pp. 452-456
Author(s):  
Mohamed Fathi ◽  
Amr F. Elkarmoty

Aim: Several factors had been concerned with the developmental competence of the sheep oocyte. This study aims to investigate the effect of adding growth factors (insulin-like growth factor 1 [IGF-1] and epidermal growth factor [EGF]) in the maturation medium of ewe oocytes selected based on brilliant cresyl blue (BCB) screening on in vitro maturation (IVM), fertilization, and pre-implantation embryo development. Materials and Methods: Cumulus-oocyte complexes (COCs) were obtained from the ovaries of slaughtered ewes by either aspiration or slicing techniques. COCs were in vitro matured in a medium containing IGF-1 and EGF (control group). For BCB screening, oocytes were stained and divided into BCB+ oocytes that matured in the same maturation conditions without adding growth factors (Group 2) or in the presence of growth factors (Group 3), and BCB– oocytes that matured in medium without growth factors (Group 4) or with growth factors (Group 5). Results: The supplementation of the maturation medium with growth factors during IVM of (BCB+) oocytes resulted in a significant increase in nuclear maturation rate (90.9%), fertilization rate (75.6%), and embryo developmental rates (60.0%, 46.7%, and 33.3% for cleavage, morula, and blastocyst, respectively). Conclusion: Culturing BCB+ oocytes in a maturation medium containing both EGF and IGF-1 showed a significant improvement in nuclear maturation, fertilization, and pre-implantation embryo development in vitro.


2013 ◽  
Vol 136 (4) ◽  
pp. 245-251 ◽  
Author(s):  
S.M. Mirshamsi ◽  
H. KaramiShabankareh ◽  
M. Ahmadi-Hamedani ◽  
L. Soltani ◽  
H. Hajarian ◽  
...  

Nature ◽  
1965 ◽  
Vol 207 (4994) ◽  
pp. 329-329 ◽  
Author(s):  
B. C. ARNOLD

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