Daisy Joseph | Bhabha Atomic Research Centre (original) (raw)

Papers by Daisy Joseph

Research paper thumbnail of Proton induced x-ray emission (PIXE)-an ideal technique in bio-sciences

Indian Journal of Radiation Research, 2004

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Research paper thumbnail of Analysis of lead in bone by EDXRF

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Research paper thumbnail of International Conference on Orthopedics and Arthoplasty

Orthopedic & Muscular System: Current Research, 2021

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Research paper thumbnail of Levels of trace elements of few Indian spices by Energy Dispersive X-Ray Fluorescence (EDXRF) method

Journal of Food Science and Technology-mysore, 1999

Concentrations of K,Ca,Mn,Fe,Cu,Zn,Rb and Sr were determined in Indian spices namely, pepper, clo... more Concentrations of K,Ca,Mn,Fe,Cu,Zn,Rb and Sr were determined in Indian spices namely, pepper, clove, cardamom, cinnamon and cumin by Radioisotope excited Energy Dispersive X-ray Fluoresence method. The levels of K and Ca were highest in cinnamon and cumin and that of Mn was highest in clove and cinnamon. Rubidium and strontium were found in all spices except cinnamon. Chromium and titanium were found only in pepper. The level of toxicity and the significance of the above trace elements in the human diet are discussed.

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Research paper thumbnail of K-shell jump ratios and jump factors for molybdenum and silver by using 2D-geometrical configuration and a weak gamma source

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Research paper thumbnail of Analyzing the Role of Saline Infusion Sonography in the Characterization of Endometrial Pathologies

journal of medical science and clinical research, 2017

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Research paper thumbnail of Low Temperature Combustion Synthesis and Characterization of Undoped and Samarium Doped Zinc Oxide Nanoparticles

Journal of Advanced Scientific Research

Zinc oxide (ZnO) and samarium (Sm) doped ZnO nanoparticles (NPs) were synthesised by solution com... more Zinc oxide (ZnO) and samarium (Sm) doped ZnO nanoparticles (NPs) were synthesised by solution combustion approach using citric acid as fuel. The formation of hexagonal wurtzite structure of pure and Sm doped ZnO powder was prepared and confirmed by x-ray diffraction (XRD). The structure formation, morphological and elemental analysis of pure and Sm doped ZnO powder were analysed using XRD, Raman spectra, scanning electron microscopy (SEM) and xray fluorescence spectroscopy (XRF). The results indicated that the trivalent Sm ions were successfully doped in to the lattice of ZnO matrix. The XRD images showed that both ZnO and Sm doped ZnO NPs are highly crystalline, having hexagonal wurtzite structure.

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Research paper thumbnail of Reactive Centers of Curcumin and the Possible Role of Metal Complexes of Curcumin as Antioxidants

Curcumin is known as a blood purifier in Ayurveda which has been recently ascribed to its chelati... more Curcumin is known as a blood purifier in Ayurveda which has been recently ascribed to its chelating ability with metal, hence reducing the deposition of metal in the body. Curcumin can exhibit keto-enol tautomerism and in the synthesized 1:1 metal complexes, the enolate ion chelate to the metal. The antioxidant activity of the synthesized metal complexes of curcumin was slightly less than the parent curcumin-I. Curcumin in the complexed state retains its antioxidant behavior, consequently establishing importance of phenolic group in deciding its antioxidant activity. The study reveals that the flexibility at the diketo moiety is not a requisite for the radical formation and sufficient scavenging of DPPH occur by phenoxide ion formation.

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Research paper thumbnail of Determination of uranium in complex matrices using radioisotope induced energy dispersive X-ray fluorescence

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Research paper thumbnail of Elemental Analysis Of Indian Green and Black Tea leaves using Hand Held X-ray Fluorescence Spectrometer

Green and black tea samples available in Indian markets were analyzed for their elemental composi... more Green and black tea samples available in Indian markets were analyzed for their elemental composition using Hand held X-ray Fluorescence spectrometer. Twenty eight elements were analyzed in the tea leaves. Macronutrients detected in major proportions were K and Ca, while Zn, Fe, Cu, Mn, and Mg were the micronutrients detected in all the samples. Si, P and S were the nonmetals detected in the tea leaves. The samples also showed presence of rare earth metals like Ag, Sr, Rb, Nb and Mo.

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Research paper thumbnail of Determination of Ruthenium in ion exchange membranes by Radioisotope induced Energy Dispersive X-ray Fluorescence

Academia Letters, 2021

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Research paper thumbnail of Proton Induced X-ray Emission Studies Using Folded tandem Ion Accelerator (FOTIA) at Bhabha Atomic Research Centre (BARC), Trombay, Mumbai, India

Mapana - Journal of Sciences, 2019

The Folded Tandem Ion Accelerator (FOTIA) at Van De Graaff was used to study PIXE (Particle-induc... more The Folded Tandem Ion Accelerator (FOTIA) at Van De Graaff was used to study PIXE (Particle-induced X-ray Emission) using protons of energy 3-5 MeV. It has been used for a variety of applications from studying intensity ratios, biological samples (blood), rare earth, materials (gold standards), geological samples (gemstones) pottery samples and forensic samples (ink). This article attempts to elucidate the preparation methods of the samples, the detectors used, the analysis and the findings therein for different applications.

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Research paper thumbnail of Chemical shift at the X-ray K-absorption edge of Zn in some Zn compounds

Madridge Journal of Analytical Sciences and Instrumentation, 2017

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Research paper thumbnail of Study of coercive fields and Kβ/Kα X-ray intensity ratios of nickel films in the thickness range of 5-2000 nm

Coercive fields and X-Ray intensity ratios of the K-series lines of Ni films in the thickness ran... more Coercive fields and X-Ray intensity ratios of the K-series lines of Ni films in the thickness range of 5-2000 nm deposited onto Si (111) substrate have been studied. The Coercive field is observed to increase with thickness and follows power law for the thickness range ≥ 50 nm. For lower thickness, there is a deviation from power law. A correlated change is also observed in the Kβ/Kα X-ray intensity ratios.

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Research paper thumbnail of Detection limits of high temperature superconducting materials on various substrates by energy dispersive X-ray fluorescence and proton induced X-ray emission methods

Pramana, 1990

Application of energy dispersive X-ray fluorescence (EDXRF) and proton induced X-ray emission (PI... more Application of energy dispersive X-ray fluorescence (EDXRF) and proton induced X-ray emission (PIXE) methods has been demonstrated for determining the elemental composition of thin film superconducting materials. The results of analysis carried out by EDXRF method have been compared with those obtained by PIXE method. Thin films of YBa2Cu3O7 superconducting material were deposited on various substrates such as thin mylar

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Research paper thumbnail of Elemental Detection of Zinc in Ayurvedic Drug (Jasad Bhasma) by Radioisotope induced Energy Dispersive X-ray Fluorescence (EDXRF) Technique

Madridge Journal of Analytical Sciences and Instrumentation, 2018

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Research paper thumbnail of K-SHELL X-RAY INTENSITY RATIOS AND VACANCY TRANSFER PROBABILITIES OF Pt , Au , AND Pb BY A SIMPLE METHOD

Журнал Экспериментальной и Теоретической Физики, 2014

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Research paper thumbnail of Application of peltier cooled X-ray detector in radioisotope induced EDXRF

A Peltier cooled X-ray detector of Bruker Baltic make was tested and applied for studying pottery... more A Peltier cooled X-ray detector of Bruker Baltic make was tested and applied for studying pottery samples using Cd109 and Am241 radios isotope sources. The characteristics of Si(Li) Peltier-cooled detectors are close to those of detectors cooled with the liquid nitrogen and remain the most preferred type of detectors for the tasks of X-ray fluorescence analysis. One of the conditions to provide low detection limits for Xray fluorescence (XRF) analysis equipment is high energy resolution of the detector applied for the detection of the characteristic radiation. Semiconductor detectors offer the best energy resolution, but often at the expense of deep cooling with liquid nitrogen LN2. In recent years, there has been significant progress in the development of semiconductor detectors without the need for deep cooling. The operating temperature of these detectors could be maintained by thermoelectric Peltier coolers. The characteristics of semiconductor x-ray detectors with Peltier coole...

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Research paper thumbnail of Chemical Shift Studies of 3d Elements Mn, Cr and Cu K-edges by X-ray Absorption Spectroscopy (XAS) with INDUS-2 Synchrotron Radiation at RRCAT, Indore, India

Mn, Cr and Cu K X-ray absorption edges were measured in various compounds containing Mn in Mn, Mn... more Mn, Cr and Cu K X-ray absorption edges were measured in various compounds containing Mn in Mn, Mn and Mn oxidation states, Cr in Cr and Cr oxidation state and Cu in 2+ states in different compounds. Few compounds are having tetrahedral coordination in the 1 shell surrounding the cation while others are having octahedral coordination. The measurements have been carried out at the energy dispersive EXAFS beamline at INDUS-2 Synchrotron radiation source at RRCAT, Indore. Energy shifts of ~ 8-16 eV were observed for Mn K edge in the Mn-compounds while a shift of 13-20 eV were observed for Cr K edge in Cr-compounds compared to their values in elemental Mn and Cr respectively. Cu showed an energy shift of 4-7 ev compared to the elemental Cu. The different chemical shifts observed for the compounds having the same oxidation state of the cation but different anions or ligands show the effect of different chemical environments surrounding the cations in determining their X-ray absorption edg...

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Research paper thumbnail of Trace Element Analysis of Dental Powders by X-ray Fluorescence Technique

Nanotechnology opens a new opportunity for the food industry and food products to use new managem... more Nanotechnology opens a new opportunity for the food industry and food products to use new management systems has capable of treated with any risks associated with nanofoods as well as the use of nanotechnology at food industry. Nanomaterials have a wide surface area per each mass unit, they are expected to be more biologically active than larger-sized particles of the same chemical composition, which offer numerous perspectives for functional food applications [1]

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Research paper thumbnail of Proton induced x-ray emission (PIXE)-an ideal technique in bio-sciences

Indian Journal of Radiation Research, 2004

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Research paper thumbnail of Analysis of lead in bone by EDXRF

Bookmarks Related papers MentionsView impact

Research paper thumbnail of International Conference on Orthopedics and Arthoplasty

Orthopedic & Muscular System: Current Research, 2021

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Levels of trace elements of few Indian spices by Energy Dispersive X-Ray Fluorescence (EDXRF) method

Journal of Food Science and Technology-mysore, 1999

Concentrations of K,Ca,Mn,Fe,Cu,Zn,Rb and Sr were determined in Indian spices namely, pepper, clo... more Concentrations of K,Ca,Mn,Fe,Cu,Zn,Rb and Sr were determined in Indian spices namely, pepper, clove, cardamom, cinnamon and cumin by Radioisotope excited Energy Dispersive X-ray Fluoresence method. The levels of K and Ca were highest in cinnamon and cumin and that of Mn was highest in clove and cinnamon. Rubidium and strontium were found in all spices except cinnamon. Chromium and titanium were found only in pepper. The level of toxicity and the significance of the above trace elements in the human diet are discussed.

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Research paper thumbnail of K-shell jump ratios and jump factors for molybdenum and silver by using 2D-geometrical configuration and a weak gamma source

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Analyzing the Role of Saline Infusion Sonography in the Characterization of Endometrial Pathologies

journal of medical science and clinical research, 2017

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Low Temperature Combustion Synthesis and Characterization of Undoped and Samarium Doped Zinc Oxide Nanoparticles

Journal of Advanced Scientific Research

Zinc oxide (ZnO) and samarium (Sm) doped ZnO nanoparticles (NPs) were synthesised by solution com... more Zinc oxide (ZnO) and samarium (Sm) doped ZnO nanoparticles (NPs) were synthesised by solution combustion approach using citric acid as fuel. The formation of hexagonal wurtzite structure of pure and Sm doped ZnO powder was prepared and confirmed by x-ray diffraction (XRD). The structure formation, morphological and elemental analysis of pure and Sm doped ZnO powder were analysed using XRD, Raman spectra, scanning electron microscopy (SEM) and xray fluorescence spectroscopy (XRF). The results indicated that the trivalent Sm ions were successfully doped in to the lattice of ZnO matrix. The XRD images showed that both ZnO and Sm doped ZnO NPs are highly crystalline, having hexagonal wurtzite structure.

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Research paper thumbnail of Reactive Centers of Curcumin and the Possible Role of Metal Complexes of Curcumin as Antioxidants

Curcumin is known as a blood purifier in Ayurveda which has been recently ascribed to its chelati... more Curcumin is known as a blood purifier in Ayurveda which has been recently ascribed to its chelating ability with metal, hence reducing the deposition of metal in the body. Curcumin can exhibit keto-enol tautomerism and in the synthesized 1:1 metal complexes, the enolate ion chelate to the metal. The antioxidant activity of the synthesized metal complexes of curcumin was slightly less than the parent curcumin-I. Curcumin in the complexed state retains its antioxidant behavior, consequently establishing importance of phenolic group in deciding its antioxidant activity. The study reveals that the flexibility at the diketo moiety is not a requisite for the radical formation and sufficient scavenging of DPPH occur by phenoxide ion formation.

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Research paper thumbnail of Determination of uranium in complex matrices using radioisotope induced energy dispersive X-ray fluorescence

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Elemental Analysis Of Indian Green and Black Tea leaves using Hand Held X-ray Fluorescence Spectrometer

Green and black tea samples available in Indian markets were analyzed for their elemental composi... more Green and black tea samples available in Indian markets were analyzed for their elemental composition using Hand held X-ray Fluorescence spectrometer. Twenty eight elements were analyzed in the tea leaves. Macronutrients detected in major proportions were K and Ca, while Zn, Fe, Cu, Mn, and Mg were the micronutrients detected in all the samples. Si, P and S were the nonmetals detected in the tea leaves. The samples also showed presence of rare earth metals like Ag, Sr, Rb, Nb and Mo.

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Research paper thumbnail of Determination of Ruthenium in ion exchange membranes by Radioisotope induced Energy Dispersive X-ray Fluorescence

Academia Letters, 2021

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Research paper thumbnail of Proton Induced X-ray Emission Studies Using Folded tandem Ion Accelerator (FOTIA) at Bhabha Atomic Research Centre (BARC), Trombay, Mumbai, India

Mapana - Journal of Sciences, 2019

The Folded Tandem Ion Accelerator (FOTIA) at Van De Graaff was used to study PIXE (Particle-induc... more The Folded Tandem Ion Accelerator (FOTIA) at Van De Graaff was used to study PIXE (Particle-induced X-ray Emission) using protons of energy 3-5 MeV. It has been used for a variety of applications from studying intensity ratios, biological samples (blood), rare earth, materials (gold standards), geological samples (gemstones) pottery samples and forensic samples (ink). This article attempts to elucidate the preparation methods of the samples, the detectors used, the analysis and the findings therein for different applications.

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Research paper thumbnail of Chemical shift at the X-ray K-absorption edge of Zn in some Zn compounds

Madridge Journal of Analytical Sciences and Instrumentation, 2017

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Research paper thumbnail of Study of coercive fields and Kβ/Kα X-ray intensity ratios of nickel films in the thickness range of 5-2000 nm

Coercive fields and X-Ray intensity ratios of the K-series lines of Ni films in the thickness ran... more Coercive fields and X-Ray intensity ratios of the K-series lines of Ni films in the thickness range of 5-2000 nm deposited onto Si (111) substrate have been studied. The Coercive field is observed to increase with thickness and follows power law for the thickness range ≥ 50 nm. For lower thickness, there is a deviation from power law. A correlated change is also observed in the Kβ/Kα X-ray intensity ratios.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Detection limits of high temperature superconducting materials on various substrates by energy dispersive X-ray fluorescence and proton induced X-ray emission methods

Pramana, 1990

Application of energy dispersive X-ray fluorescence (EDXRF) and proton induced X-ray emission (PI... more Application of energy dispersive X-ray fluorescence (EDXRF) and proton induced X-ray emission (PIXE) methods has been demonstrated for determining the elemental composition of thin film superconducting materials. The results of analysis carried out by EDXRF method have been compared with those obtained by PIXE method. Thin films of YBa2Cu3O7 superconducting material were deposited on various substrates such as thin mylar

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Elemental Detection of Zinc in Ayurvedic Drug (Jasad Bhasma) by Radioisotope induced Energy Dispersive X-ray Fluorescence (EDXRF) Technique

Madridge Journal of Analytical Sciences and Instrumentation, 2018

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Research paper thumbnail of K-SHELL X-RAY INTENSITY RATIOS AND VACANCY TRANSFER PROBABILITIES OF Pt , Au , AND Pb BY A SIMPLE METHOD

Журнал Экспериментальной и Теоретической Физики, 2014

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Research paper thumbnail of Application of peltier cooled X-ray detector in radioisotope induced EDXRF

A Peltier cooled X-ray detector of Bruker Baltic make was tested and applied for studying pottery... more A Peltier cooled X-ray detector of Bruker Baltic make was tested and applied for studying pottery samples using Cd109 and Am241 radios isotope sources. The characteristics of Si(Li) Peltier-cooled detectors are close to those of detectors cooled with the liquid nitrogen and remain the most preferred type of detectors for the tasks of X-ray fluorescence analysis. One of the conditions to provide low detection limits for Xray fluorescence (XRF) analysis equipment is high energy resolution of the detector applied for the detection of the characteristic radiation. Semiconductor detectors offer the best energy resolution, but often at the expense of deep cooling with liquid nitrogen LN2. In recent years, there has been significant progress in the development of semiconductor detectors without the need for deep cooling. The operating temperature of these detectors could be maintained by thermoelectric Peltier coolers. The characteristics of semiconductor x-ray detectors with Peltier coole...

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Chemical Shift Studies of 3d Elements Mn, Cr and Cu K-edges by X-ray Absorption Spectroscopy (XAS) with INDUS-2 Synchrotron Radiation at RRCAT, Indore, India

Mn, Cr and Cu K X-ray absorption edges were measured in various compounds containing Mn in Mn, Mn... more Mn, Cr and Cu K X-ray absorption edges were measured in various compounds containing Mn in Mn, Mn and Mn oxidation states, Cr in Cr and Cr oxidation state and Cu in 2+ states in different compounds. Few compounds are having tetrahedral coordination in the 1 shell surrounding the cation while others are having octahedral coordination. The measurements have been carried out at the energy dispersive EXAFS beamline at INDUS-2 Synchrotron radiation source at RRCAT, Indore. Energy shifts of ~ 8-16 eV were observed for Mn K edge in the Mn-compounds while a shift of 13-20 eV were observed for Cr K edge in Cr-compounds compared to their values in elemental Mn and Cr respectively. Cu showed an energy shift of 4-7 ev compared to the elemental Cu. The different chemical shifts observed for the compounds having the same oxidation state of the cation but different anions or ligands show the effect of different chemical environments surrounding the cations in determining their X-ray absorption edg...

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Research paper thumbnail of Trace Element Analysis of Dental Powders by X-ray Fluorescence Technique

Nanotechnology opens a new opportunity for the food industry and food products to use new managem... more Nanotechnology opens a new opportunity for the food industry and food products to use new management systems has capable of treated with any risks associated with nanofoods as well as the use of nanotechnology at food industry. Nanomaterials have a wide surface area per each mass unit, they are expected to be more biologically active than larger-sized particles of the same chemical composition, which offer numerous perspectives for functional food applications [1]

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Research paper thumbnail of Curriculum Vitae - Daisy Joseph.docx

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