scholarly journals EFFECTS OF GAMMA-IRRADIATION ON NANOSTRUCTURED Na-BENTONITE SILICATE LAYERS AT ROOM TEMPERATURE

2021 ◽  
pp. 51-56
Author(s):  
M.K. Ismayilova
Keyword(s):  
Bentonite Clay ◽  
Small Variation ◽  
Mineral Surfaces ◽  
Surface Phenomena ◽  
Γ Radiation ◽  
Ft Ir ◽  
Γ Rays ◽  
High Doses ◽  
Ir Study ◽  
Silicate Layers

The aim of this paper to study the effects of γ-rays on nanostructured Na-bentonite clay from Alpoid deposit. The effect of high doses (up to 256 kGy) of γ-radiation on the short-range structural organization in montmorillonite was studied using infrared spectroscopy. Significant change attributable to irradiation was observed at dose of 57 kGy. No significant changes were observed after 57 kGy of γ-radiation. A small variation in the water content was noted but it is not systematic. The results show that the montmorillonite structure can accumulate high doses of radiation with damage. The modifications most likely to be generated by the radiation were expected to be within the silicate layers. The morphology of the nanocomposites was studied with scanning electron microscopy. In this paper, the effects of ionizing radiation on the Na-bentonite clay investigated by FT-IR method. These spectra show the suitability of FT-IR study of mineral surfaces and the changes in the spectra brought about by the surface phenomena.

VARIATIONS IN GENETIC ARCHITECTURE AT DIFFERENT DOSES OF γ-RADIATION AS MEASURED BY LONGEVITY IN DROSOPHILA MELANOGASTER

1973 ◽  
Vol 15 (2) ◽  
pp. 289-298 ◽  
Author(s):  
Jane M. Westerman ◽  
P. A. Parsons
Keyword(s):  
Drosophila Melanogaster ◽  
Genetic Architecture ◽  
Inbred Lines ◽  
Additive Effects ◽  
Control Data ◽  
Genetic Studies ◽  
Γ Radiation ◽  
Γ Rays ◽  
High Doses ◽  
Different Doses

Longevity (as a measure of resistance to irradiation) has been examined after different doses of 60Co γ-rays, in four inbred lines and their hybrids in D. melanogaster. The control data showed some additive and non-additive effects. At 40, 60, 80, 100 and 120 krads, non-additive effects were highly significant, but additive effects were significant only at 100 and 120 krads, in particular the latter. Thus the genetic architecture varies with dose. Detailed genetic studies probably are simplest to carry out at high doses, because of the importance of additive effects.

An FT-IR Study on Packing Defects in Mixed β-Aggregates of Poly(l-glutamic acid) and Poly(d-glutamic acid): A High-Pressure Rescue from a Kinetic Trap

2012 ◽  
Vol 116 (17) ◽  
pp. 5172-5178 ◽  
Author(s):  
Yudai Yamaoki ◽  
Hiroshi Imamura ◽  
Aleksandra Fulara ◽  
Sławomir Wójcik ◽  
Łukasz Bożycki ◽  
...  
Keyword(s):  
High Pressure ◽  
Glutamic Acid ◽  
Kinetic Trap ◽  
Packing Defects ◽  
Ft Ir ◽  
Ir Study

AN ENHANCEMENT OF SOLUBILITY OF PIOGLITAZONE HYDROCHLORIDE USING LIQUISOLID TECHNIQUE

INDIAN DRUGS ◽  
2013 ◽  
Vol 50 (06) ◽  
pp. 36-39
Author(s):  
S Deshmane ◽  
◽  
K Gandhi ◽  
S. Nagpure ◽  
A. Sawant ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Drug Release ◽  
Dissolution Rate ◽  
In Vivo Study ◽  
Dimethyl Acetamide ◽  
Volatile Liquid ◽  
Ft Ir ◽  
Ir Study

The new mathematical model was developed by studying angle of slide using N, N-dimethyl acetamide, non-volatile liquid vehicle and prepared liquisolid tablets, in which the different concentrations of non-volatile liquid adsorbed over carrier and coating material separately. Both DSC and FT-IR study showed better compatibility and stability. The optimized formulation showed higher drug release during in-vitro and in-vivo study against conventional and marketed preparation. The present work concludes that N, N-dimethyl acetamide enhanced the solubility of pioglitazone HCl with higher dissolution rate through liquisolid technique.

FT-IR study on solvent effects in building blocks of bioactive compounds. V

2006 ◽  
Vol 790 (1-3) ◽  
pp. 89-93
Author(s):  
C. Conti ◽  
R. Galeazzi ◽  
E. Giorgini ◽  
G. Tosi
Keyword(s):  
Bioactive Compounds ◽  
Solvent Effects ◽  
Building Blocks ◽  
Ft Ir ◽  
Ir Study

Preparation and Characterization of Ni2+-Montmorillonite/Polyvinyl Alcohol Water-Soluble Nanocomposite Film

2005 ◽  
Vol 13 (8) ◽  
pp. 839-846 ◽  
Author(s):  
Li-Ping Wang ◽  
Yun-Pu Wang ◽  
Fa-Ai Zhang
Keyword(s):  
Polyvinyl Alcohol ◽  
Photoelectron Spectroscopy ◽  
Thermal Characteristics ◽  
Water Soluble ◽  
Scanning Calorimetry ◽  
Xps Spectra ◽  
X Ray ◽  
Alcohol Water ◽  
Ft Ir ◽  
Silicate Layers

A new type of nano-composite film was prepared from polyvinyl alcohol, Ni2+-montmorillonite (Ni2+-MMT), defoamer, a levelling agent and a plasticizer. Its thermal characteristics were studied by Differential Scanning Calorimetry (DSC). The intermolecular interactions were measured by Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS), and the tensile strength (TS) and elongation at break (%E) were measured. The microstructures were studied by X-ray diffraction (XRD) and atomic force microscopy (AFM). FT-IR and XPS spectra indicated that cross-linking has taken place between PVA and Ni2+-MMT. XRD and AFM indicate that the PVA molecules had inserted themselves into the silicate layers of MMT, exfoliating them and dispersing them randomly into the PVA matrix. Compared to pure PVA film, the TS of the films was increased and %E decreased when the Ni2+-Montmorillonite was added and the dissolution temperature of the film was also reduced.

An FT-IR study of the isomerization of 1-butoxy radicals under atmospheric conditions

2006 ◽  
Vol 177 (2-3) ◽  
pp. 109-115 ◽  
Author(s):  
Paola Cassanelli ◽  
Richard A. Cox ◽  
John J. Orlando ◽  
Geoffrey S. Tyndall
Keyword(s):  
Atmospheric Conditions ◽  
Ft Ir ◽  
Ir Study

Metal ion interactions with sugars. The crystal structure and FT-IR study of the NdCl3–ribose complex

2003 ◽  
Vol 338 (24) ◽  
pp. 2913-2919 ◽  
Author(s):  
Yan Lu ◽  
Guocai Deng ◽  
Fangming Miao ◽  
Zhengming Li
Keyword(s):  
Crystal Structure ◽  
Metal Ion ◽  
Ion Interactions ◽  
Ft Ir ◽  
Ir Study ◽  
Metal Ion Interactions

THE EFFECT OF INTERACTIONS ON THE ANGULAR DISTRIBUTION OF γ-RAYS FROM AN ASSEMBLY OF ORIENTED NUCLEI

1957 ◽  
Vol 35 (9) ◽  
pp. 1133-1145 ◽  
Author(s):  
J. M. Daniels
Keyword(s):  
Angular Distribution ◽  
Energy State ◽  
Nuclear Orientation ◽  
Γ Radiation ◽  
Orientation Experiment ◽  
High Temperature Approximation ◽  
Γ Rays ◽  
Matrix Formula ◽  
Paramagnetic Ions ◽  
Radioactive Ions

The angular distribution of γ-radiation from an assembly of nuclei oriented by the magnetic h.f.s. method can be very much modified by interactions between the radioactive ions and other paramagnetic ions in the crystal. In order to calculate the effect of these interactions, an operator Γ is derived which represents the angular distribution of γ-rays from a radioactive nucleus. The angular distribution at any temperature is given by Spur(Γρ), where ρ is the statistical matrix [Formula: see text], [Formula: see text] being the Hamiltonian for the whole crystal. For a high temperature approximation, ρ is expanded in powers of 1/T. It is found that, for alignment by the magnetic h.f.s. method, the first term which contains interaction parameters is that in 1/T4, and an expression is given for the contribution of interactions to this term.At very low temperatures, perturbation theory is used to estimate the effect of interactions on the lowest nuclear energy state, and hence on the angular distribution of γ-rays. It is found that, if an external magnetic field is applied along a principal axis of the g-tensor of the radioactive ions, interactions have no influence on the angular distribution of γ-rays in the limit of large fields. It is also shown that Bleaney's restriction, that for a successful nuclear orientation experiment the broadening of the levels should be less than the hyperfine splitting, is not necessary in this case.

scholarly journals Preliminary Assessment on the Effect of Bentonite and Ibeshe Clay on Bleaching of Rubber (Hevea Brasiliensis) Seed Oil

2019 ◽  
Vol 8 (4) ◽  
pp. 12274-12278
Keyword(s):  
Seed Oil ◽  
Research Work ◽  
Bentonite Clay ◽  
Xrd Analysis ◽  
Rubber Seed Oil ◽  
Physiochemical Properties ◽  
Rubber Seed ◽  
Natural Sense ◽  
Ft Ir ◽  
Removal Of Impurities

Rubber seed though not common known is very rich in its oil yield and over time its importance is becoming more prominent. Bleaching in the natural sense is relative to the removal of impurities from the oil or material. In this research work, Rubber seed oil was bleached using bentonite clay and Ibeshe clay at 0.5M, 1M and 2M concentrations of Hydrochloric acid. Physiochemical properties as well as spectroscopic analysis such as FT-IR and XRD analysis were carried out and aided in obtaining the bleaching efficiency of both clays. The FT-IR results displayed a visible change in the oil after it was bleached with Ibeshe clay but still retained most its functional group when bleached with bentonite clay. At 2M concentration of the acid, the oil bleached with bentonite showed 53% while with Ibeshe clay it remained at 16%. This summarizes that Ibeshe clay has little to no effect on bleaching performance.

Spectroscopic analysis of a dye-mineral composite-a Raman and FT-IR study

2008 ◽  
Vol 39 (9) ◽  
pp. 1257-1261 ◽  
Author(s):  
F. S. Manciu ◽  
A. Ramirez ◽  
W. Durrer ◽  
J. Govani ◽  
R. R. Chianelli
Keyword(s):  
Spectroscopic Analysis ◽  
Ft Ir ◽  
Ir Study
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