Influence of Sm3+ ion concentration on the photoluminescence behavior of Antimony Lead Oxy Fluoro Borate glasses

2021 ◽  
pp. 111597
Author(s):  
D. Amer ◽  
K. Swapna ◽  
J. V. Shanmukh Kumar ◽  
Sk. Mahamuda ◽  
M. Venkateswarulu ◽  
...  
Keyword(s):  
Ion Concentration ◽  
Borate Glasses ◽  
Photoluminescence Behavior

FTIR SPECTRAL ANALYSIS ON HEAVY METAL BORATE GLASSES

2006 ◽  
Vol 20 (10) ◽  
pp. 533-538 ◽  
Author(s):  
B. KARTHIKEYAN
Keyword(s):  
Heavy Metal ◽  
Spectral Analysis ◽  
Structural Analysis ◽  
Transition Metal ◽  
Metal Ion ◽  
Ion Concentration ◽  
Borate Glasses ◽  
Melt Quenching ◽  
Ftir Spectral Analysis ◽  
Metal Borate

Inorganic heavy metal borate glasses were prepared through the melt quenching technique. Two sets of glasses were prepared, the compositions are (wt.%) 35 Bi 2 O 3+(50-x) B 2 O 3+15 Na 2 O +x PbO , where x=0, 10, 20, 30 and 35 MO +30 Na 2 O +35 B 2 O 3 ( MO = Bi 2 O 3, PbO , ZnO ). The FTIR structural analysis was made. These glasses have different borate groups and it mainly depends on the modifier/metal ion concentration. The influence of heavy metal and transition metal ion on the borate network were also identified.

scholarly journals Fabrication and Characterization of Sm3+ Doped Zinc Barium Borate Glasses

2018 ◽  
Vol 63 (7) ◽  
pp. 608
Author(s):  
Y. Yamsuk ◽  
P. Yasaka ◽  
N. Sangwaranatee ◽  
J. Keawkao
Keyword(s):  
Transition Probabilities ◽  
Emission Cross Section ◽  
Radiative Transition ◽  
Ion Concentration ◽  
Borate Glasses ◽  
Barium Borate ◽  
Photoluminescence Spectra ◽  
Intensity Parameters ◽  
Fabrication And Characterization

Zinc-barium-borate glasses with the composition (60 − x)B2O3–10ZnO–30BaO–xSm2O3 (where x = 0.5, 1.0, 1.5, 2.0 and 2.5 mol %) doped with Sm3+ ions have been prepared, and their physical and optical properties are investigated. The photoluminescence spectra recorded under the 403-nm excitation exhibited the emission bands at 564, 600, 647, and 710 nm corresponding to the transition 4 G5/2 →6 Hj (j = 5/2, 7/2, 9/2, 11/2), respectively. Judd–Ofelt intensity parameters (Ωl, l = 2, 4 and 6) have been evaluated, and the radiative transition probabilities, emission cross-section, and branching ratios for the excited levels of Sm3+ ionsare predicted. The lifetime of the 4 G5/2 level is found to decrease with an increase in the Sm3+ ion concentration.

Ratio imaging of intracellular ion concentration

1992 ◽  
Vol 50 (2) ◽  
pp. 1160-1161
Author(s):  
Stephen R. Bolsover
Keyword(s):  
Individual Cell ◽  
Video Camera ◽  
Field Of View ◽  
Ion Concentration ◽  
Fluorescence Signal ◽  
Ion Imaging ◽  
Ratiometric Fluorescence ◽  
Ratio Imaging ◽  
The Mean ◽  
The Many

The field of intracellular ion concentration measurement expanded greatly in the 1980's due primarily to the development by Roger Tsien of ratiometric fluorescence dyes. These dyes have many applications, and in particular they make possible to image ion concentrations: to produce maps of the ion concentration within living cells. Ion imagers comprise a fluorescence microscope, an imaging light detector such as a video camera, and a computer system to process the fluorescence signal and display the map of ion concentration.Ion imaging can be used for two distinct purposes. In the first, the imager looks at a field of cells, measuring the mean ion concentration in each cell of the many in the field of view. One can then, for instance, challenge the cells with an agonist and examine the response of each individual cell. Ion imagers are not necessary for this sort of experiment: one can instead use a system that measures the mean ion concentration in a just one cell at any one time. However, they are very much more convenient.

Confocal imaging of calcium in intact ventricular muscle provides a new view of excitation-contraction coupling

1996 ◽  
Vol 54 ◽  
pp. 738-739
Author(s):  
W.G. Wier
Keyword(s):  
Local Control ◽  
Cardiac Tissue ◽  
Cell Function ◽  
Isolated Heart ◽  
Cardiac Cells ◽  
Confocal Imaging ◽  
Ion Concentration ◽  
Heart Cell ◽  
Free Calcium ◽  
Heart Cells

A fundamentally new understanding of cardiac excitation-contraction (E-C) coupling is being developed from recent experimental work using confocal microscopy of single isolated heart cells. In particular, the transient change in intracellular free calcium ion concentration ([Ca2+]i transient) that activates muscle contraction is now viewed as resulting from the spatial and temporal summation of small (∼ 8 μm3), subcellular, stereotyped ‘local [Ca2+]i-transients' or, as they have been called, ‘calcium sparks'. This new understanding may be called ‘local control of E-C coupling'. The relevance to normal heart cell function of ‘local control, theory and the recent confocal data on spontaneous Ca2+ ‘sparks', and on electrically evoked local [Ca2+]i-transients has been unknown however, because the previous studies were all conducted on slack, internally perfused, single, enzymatically dissociated cardiac cells, at room temperature, usually with Cs+ replacing K+, and often in the presence of Ca2-channel blockers. The present work was undertaken to establish whether or not the concepts derived from these studies are in fact relevant to normal cardiac tissue under physiological conditions, by attempting to record local [Ca2+]i-transients, sparks (and Ca2+ waves) in intact, multi-cellular cardiac tissue.

ULTRASONIC STUDY OF LITHIUM BORATE GLASSES

1982 ◽  
Vol 43 (C9) ◽  
pp. C9-497-C9-500 ◽  
Author(s):  
M. Devaud ◽  
J.-Y. Prieur
Keyword(s):  
Borate Glasses ◽  
Lithium Borate ◽  
Ultrasonic Study
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