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- L. P. Sarma
- Suresh Kharkhanis
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- Anant V. Phadke
- Fiona Plows
- U. S. N. Reddy
- I. V. Reddy
- Fareeduddin
- C. R. M. Rao
- B. N. Gohain
- Dinesh Gupta
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Parthasarathy, G.
- Thermal Decomposition of Natural Actinolite: A High Temperature Electrical Resistivity Study
Abstract Views :165 |
PDF Views:4
Authors
Affiliations
1 National Geophysical Research Institute, Hyderabad - 500 007, IN
1 National Geophysical Research Institute, Hyderabad - 500 007, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 53, No 5 (1999), Pagination: 571-578Abstract
We report here the first observation of a thermally induced irreversible decomposition in natural actinolite, collected from Santaveri, Karnataka, by using DC electrical resistivily measurements upto 1100K. The electrical resistivity of the actinolite sample is found to be 4 X 1011 Ohm-cm at room temperature and pressure. The temperature dependence of the electrical resistivity of the samples exhibits an Arrhenius behaviour ρ = ρn exp(ΔE/kT) in the region 300-700 K with an activation energy of 0.76 eV. At 770 ± 5 K a first-order increase in resistivity from 7.93 X 103 to 3.55 X 1014 ohm-cm has been observed, which is due to decomposition of the sample. In the temeprature region 775-1100 K, the value of the activation energy is found to be 0.20 eV. X-ray diffraction studies on the thermally quenched samples indicate that the decomposed phase is a mixuture of cummingtonite, clinopyroxene, plus quartz and water vapour as associated products. These breakdown products are found to be identical to those proposed by Cameron (1975), and contrary to the mineral assemblage of fayalite-hedenbergite-pyroxene-quartz-vapour as proposed by Ernst (1966).Keywords
Mineralogy, Calcic-Amphiboles, Phase Transitions, High-Temperature Electrical Resistivity Studies, Powder X-Ray Diffraction, Kamataka.
- Occurrence of Fullerene Bearing Shungite Suite in Mangampeta Area, Cuddapah District, Andhra Pradesh
Abstract Views :179 |
PDF Views:159
Authors
Suresh Kharkhanis
1,
K. S. Misra
,
M. R. Hammond
,
Anant V. Phadke
,
Fiona Plows
,
U. S. N. Reddy
,
I. V. Reddy
,
Fareeduddin
,
G. Parthasarathy
,
C. R. M. Rao
,
B. N. Gohain
,
Dinesh Gupta
Affiliations
1 Analytical Research Laboratory, Department of Polymer and Petroleum Engineering, MIT Engineering College, Kothrud, Pune - 411 038, IN
1 Analytical Research Laboratory, Department of Polymer and Petroleum Engineering, MIT Engineering College, Kothrud, Pune - 411 038, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 71, No 4 (2008), Pagination: 590-591Abstract
No Abstract.Full Text
- Natural Graphite from Neoproterozoic Psammitic Gneiss, Inanalo Mountain, Southern Madagascar
Abstract Views :177 |
PDF Views:148
Authors
Affiliations
1 Analytical Research Laboratory, Department of Polymer and Petroleum Engineering, MIT Engineering College, Kothrud, Pune - 4 11 038, IN
2 NGRI, Hyderabad - 500 007, IN
1 Analytical Research Laboratory, Department of Polymer and Petroleum Engineering, MIT Engineering College, Kothrud, Pune - 4 11 038, IN
2 NGRI, Hyderabad - 500 007, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 69, No 4 (2007), Pagination: 865-866Abstract
No Abstract.Full Text
- Natural Graphite from Neoproterozoic Psammitic Gneiss, Inanalo Mountain, Southern Madagascar
Abstract Views :220 |
PDF Views:125
Authors
Affiliations
1 National Geophysical Research lnstitute, Hyderabad -500 007, IN
2 Continental Evolution Research Group, Geology & Geophysics, School of Earth and Environmental Sciences, The Universlty of Adelaide, Adelade, SA 5005, AU
1 National Geophysical Research lnstitute, Hyderabad -500 007, IN
2 Continental Evolution Research Group, Geology & Geophysics, School of Earth and Environmental Sciences, The Universlty of Adelaide, Adelade, SA 5005, AU
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 68, No 2 (2006), Pagination: 176-180Abstract
We report here, for the first time, powder X-ray diffraction, and laser-Raman spectroscopic data on the graphite samples from Inanalo mountain (S24°24 3 1 2" E45°23'18 3 ), 20 km east of the Ampanihy shear zone of the southern Madagascar Our experimental results show that the graphite is highly crystalline, and syngenetic with the degree of graphitisation varying from 148 to 180, ylelding the peak metarnorphic temperatures of 750 to 850°C Laser Raman spectroscopic studies show only ordered peak at around 1580 cm-' In the frequency range from I000 to 2000 cm-' The commonly observed disordered peak In natural graphite is found to be absent in the studied sample, indicating high-temperature metamorphism There is no flurd deposited graphite (epigenetlc graphlte) in the sample The peak metamorphic temperature obtained In the present study is found to be in good agreement withinat obtained from the conventional geothermometry studies on the sample from the Beraketa shear zone or the Betroka tectonic belt.Keywords
Syngenetic graphite, Laser-Raman studies, XRD, Shear Zone, Inanalo Mountain, Southern Madagascar.Full Text
- Structural and Thermal Studies of Graphite from East Antarctica
Abstract Views :178 |
PDF Views:2
Authors
Affiliations
1 National Geophysical Research Institute, Hyderabad - 500 007, IN
2 Indira Gandhi Centre for Atomic Research, Kalpakkam - 603 102, IN
1 National Geophysical Research Institute, Hyderabad - 500 007, IN
2 Indira Gandhi Centre for Atomic Research, Kalpakkam - 603 102, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 61, No 3 (2003), Pagination: 335-343Abstract
We report here powder X-ray diffraction, differential thermal analysis and Laser-Raman spectroscopic data on the graphite from Schirmacher Oasis (70°45' S, 11°40' E), East Antarctica. The sample was collected from Precambrian garnet-biotite gneiss. The present X-ray studies show that the structural parameters like inter-planar spacing, d002 (3.3500 A), and crystallite size, Lc (552 A) of this sample. These values are found to be very close to that of well-crystallized graphite. All the five observed X-ray diffraction peaks have been indexed to the hexagonal phase of graphite, indicating the metamorphic origin of graphite. The observed full width at half maxima (FWHM) of the (002) peak is 0.148 A and the estimated graphitizing degree (GD=13lA) showed the high-grade metamorphism of the host rock. The estimated peak metamorphic temperature is found to be ∼973 K (700°C). DTA studies on the same graphite sample show a strong exothermic peak at 1023 K, which corresponds, to the combustion of carbonaceous matter under atmospheric condition. The absence of extra weak peak in the range 1090-1110 K, indicates the absence of any noticeable detntal graphite in the sample. The first order Laser - Raman spectra of the sample shows a strong well-ordered Raman peak (O) at 1581cm"1 and a weak broad peak due to disorder (D) at 1354cm"1. The intensity ratio disordered-to-ordered Raman peak (D/O) area has been used to estimate the in-plan crystallite size (La) of the graphite. The experimental values of D/O = 0.143 and D/D+O = 0.125 indicate that the sample is well crystallized graphite, thereby indicating the high metamorphic grade of the host rocks. The structural parameters obtained by Raman spectroscopic method and the estimated in-plane crystallite size (La = 298 A) indicate that the metamorphic grade of the host rock of the studied sample falls in the sillimanite zone. The present study suggests that the peak metamorphic temperature of the host rock could be in the temperature range of about 973 K (700°C).Keywords
East Antarctica, Graphite, X-Ray Diffraction, Schirmacher Oasis, High-Temperature Dta, East Antarctica.- A Comparative Study on Structural Properties of Graphites from Dharwar Craton, India: A High-Temperature DTA Study
Abstract Views :249 |
PDF Views:2
Authors
Affiliations
1 National Geophysical Research Institute, Hyderabad -500 007, IN
1 National Geophysical Research Institute, Hyderabad -500 007, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 57, No 5 (2001), Pagination: 435-442Abstract
We report here new experimental results on the high temperature differential thermal analyses (DTA) on six graphite samples from the Dharwar craton, along with the structural data obtained by powder X-ray diffraction, carbon isotopic and Laser Raman spectroscopic studies.
Degree of metamorphism and crystallite size obtained by X-ray studies indicates systematic variation in graphite with peak metamorphic temperatures. X-ray and Laser Raman spectroscopic studies do not show the presence of rhombohedral graphite phase which is the most characteristic of the fluid-deposited (abiogenic) graphite. The most reliable information on the origin of the graphite is provided by the carbon isotopic ratio. However, the interpretation of the isotopic data is usually not straightforward because other processes may influence the original signature. But isotopic fractionation does not alter once the graphite is well crystallized, because of very sluggish kinetics of carbon diffusion. Present studies show that the main exothermic DTA peak temperature of graphite samples decreases linearly with increase of the interplanar d-spacing d (002) of the hexagonal graphite structure and follows the relation d002 (Å) = 3.5197 - 1.67 × 10-4 T(K). These studies also reveal that DTA/thermogravimetric analysis is an effective tool for distinction of detrital graphite material from the poorly crystallized organic matter. Raman spectroscopic results on the same samples indicate systematic change in the metamorphic grade of the host rocks with the intensity ratio of disordered to ordered Raman peaks. These findings confirm that the carbon in the graphite of the metasedimentary host rocks from Dharwar craton is of metamorphic and biogenic origin, thereby confirming the findings of the isotopic studies on the same samples.
Keywords
Graphitization, DTA, Raman Spectroscopy, Karnataka, Dharwar Craton.- Mineralogical and Geochemical Study on Carbonate Veins of the Salem-Attur Fault Zone, Southern India: Evidence for Carbonatitic Affinity
Abstract Views :190 |
PDF Views:2
Authors
Affiliations
1 National Geophysical Research Institute, Uppal Road, Hyderabad-500 007, IN
2 Atomic Minerals Directorate for Exploration and Research, AMD Complex, Begumpet, Hyderabad-500 01 6, IN
1 National Geophysical Research Institute, Uppal Road, Hyderabad-500 007, IN
2 Atomic Minerals Directorate for Exploration and Research, AMD Complex, Begumpet, Hyderabad-500 01 6, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 58, No 1 (2001), Pagination: 15-26Abstract
Carbonate veins up to few metres thick have been recognised in the E-W striking Salem-Attur deep fault zone which represents the eastern extention of the Moyar fault in the southern granulite terrane of India. X-ray diffraction, FTIR spectroscopy and chemical analyses show calcite, ankerite, siderite and benstonite as dominant minerals besides minor apatite and green biotite. Whole rock compositions show enrichment of light REE, Ba, Sr and Nb. C and 0 isotopic data determined for calcite (δ13C= -4.9 to -5.1%0 V-PDB and δ180 = 9 to 9.2%0 V-SMOW) points to a mantle origin. The chemical characteristics therefore suggest that the carbonate veins have carbonatitic affinity. The FTIR spectra provide evidence for presence of H20 and CH4 in addition to CO2 in the carbonate minerals of these veins.Keywords
Ferrocarbonatites, Benstonite, FTIR Spectroscopy, X-Ray Diffraction, Geochemistry, Isotopes, Tamil Nadu.- Bindeshwar Pathak Honoured
Abstract Views :184 |
PDF Views:119
Authors
Affiliations
1 NGRI, Hyderabad, IN
1 NGRI, Hyderabad, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 74, No 4 (2009), Pagination: 537-537Abstract
No Abstract.Full Text
- Mathematical Analysis of Gravity Anomalies: Concepts, Algorithms and Computer Programs
Abstract Views :184 |
PDF Views:125
Authors
Affiliations
1 NGRI, Hyderabad - 500 606, IN
1 NGRI, Hyderabad - 500 606, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 77, No 2 (2011), Pagination: 197-199Abstract
No Abstract.Full Text
- Laser Raman Spectroscopic Studies on Graphites From Dharwar Craton: A Possible Metamorphic Grade Indicator for the Host Rocks
Abstract Views :170 |
PDF Views:3
Authors
Affiliations
1 National Geophysical Research Institute, Hyderabad - 500 007, IN
2 Materials Science Division, Indira Gandhi Centre for Atomic Research, Kalpakkam- 603 102, IN
1 National Geophysical Research Institute, Hyderabad - 500 007, IN
2 Materials Science Division, Indira Gandhi Centre for Atomic Research, Kalpakkam- 603 102, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 55, No 4 (2000), Pagination: 413-420Abstract
We present here the results of Laser-Raman Spectroscopic studies on graphite samples from the Archaean metasedimentary rocks of Dharwar craton to correlate the structural parameters of graphite with the metamorphic grade of the host rocks. The present studies show that the first order Raman peak (O) of the graphite samples appears in the wave number range from 1581 to 1585 cm-1; the second order Raman peak (S) appears in the wave number range from 2699 to 2721 cm-1; and the disorder Raman (D) peak appears in the wave number range from 1349 to 1356 cm-1. It is suggested that the intensity ratios of the Rarnan peaks (D/O)a are the inverse function of in-plane crystallite size of the graphite. The observed values of intensity ratio (D/O)h, varies from 0.095 to 0.591, (D/D+O)a varies from 0.18 to 0.46 and (S/O)h, varies from 0.21 to 0.32. This range of values indicates that the graphite samples are well crystallized. A correlation of (D/O) area ratios along with the in-plane crystallite size La (50 to 193 Å) and the metamorphic grade shows that the metamorphic grade of the host rocks of the studied samples lies in the range between upper chlorite zone and lower sillimanite zone. The estmated peak metamorphic temperatures of the host rocks are in the range of 575 to 625°C and they are in excellent agreement with temperatures obtained by the Powder X- ray diffraction studies and conventional geothermometry studies.Keywords
Raman Spectroscopy, Graphite, Carbon Isotopes, Metamorphic Temperature, Dharwar Craton, Karnataka.- X-ray Diffraction Studies on Graphites from Dharwar Craton
Abstract Views :188 |
PDF Views:2
Authors
Affiliations
1 National Geophysical Research Institute, Hyderabad - 500007, IN
1 National Geophysical Research Institute, Hyderabad - 500007, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 51, No 4 (1998), Pagination: 517-522Abstract
We report here., the results of powder x-ray diffraction studies on six graphite samples from the Archaean metasedimentary rocks of Dharwar craton, with the motivation of correlating the graphitization process of carbonaceous matter during metamorphism with metamorphic grade. Our studies show that interplanar spacing d(002) and crystallinity Lc(002) for all the studied samples are very close to that of well crystallized graphite.
The observed decrease in full width at half maximum (FWHM) of the (002) diffraction peak from 0.20 to 0.102 Å. increase in crystallite size, Lc(002) from 408 to 800 Å and graphitizing degree from 86 to 362 indicate different metamorphic grades. Our results indicate that the rocks from Hampapura are of low metamorphic grade and those from Arjun Bettahalli are highly metamorphosed. The peak metamorphic temperatures of metasedimentary rocks are estimated to be around 600±50°C. The temperature estimates based on graphite crystallinity studies and the temperatures estimated by silicate mineral geothermometry studies of the coexisting mineral assemblages were found to be consistent.
Keywords
Mineralogy, Graphites, X-Ray Diffraction, Metamorphic Grade, Peak Metamorphic Temperatures, Dharwar Craton.- Prices of Rice during the Second Five-Year Plan Period at Selected Market Centres in the Southern Zone
Abstract Views :297 |
PDF Views:1
Authors
Source
Artha Vijnana: Journal of The Gokhale Institute of Politics and Economics, Vol 3, No 2 (1961), Pagination: 135-157Abstract
All the market centres for which prices of rice are being quoted in the Weekly Bulletins of the Directorate of Economics and Statistics are taken up for study.- A Survey of Sentiment Analysis for Journal Citation
Abstract Views :150 |
PDF Views:0
Authors
Affiliations
1 Department of Computer Science and Engineering, Sathyabama University, Chennai – 600119,Tamil Nadu, IN
2 Department of Information Technology, Jerusalem College of Engineering, Chennai - 600100, Tamil Nadu, IN
1 Department of Computer Science and Engineering, Sathyabama University, Chennai – 600119,Tamil Nadu, IN
2 Department of Information Technology, Jerusalem College of Engineering, Chennai - 600100, Tamil Nadu, IN
Source
Indian Journal of Science and Technology, Vol 8, No 35 (2015), Pagination:Abstract
Sentiment analysis approach belongs to the family of machine learning, where the objective is to discover useful patterns stored in a database. Due to wide availability of data, there is an upcoming need for turning such an overwhelming amount of data into useful knowledge. In this paper we recommend different techniques available for high accuracy extraction of citations for academic papers and improve the performance in citation extraction by integration of two techniques. Therefore our aim is to automate the task to determine whether a context is positive or negative. The main goal of sentiment analysis lies in finding the polarity of citation expressed in different research article. In this paper we address the techniques, approaches and methods of the research which are supportive and marked as the essential field of sentiment analysis of citations in research article. This literature survey is done to study the sentiment analysis problem in journal citation to identify different trends and recommend the upcoming research directions.Keywords
Citation Analysis, Information Retrieval, Sentiment AnalysisFull Text
- Effect of Bile Salts on Transbuccal Permeability of Carbamazepine through Porcine Buccal Mucosa
Abstract Views :197 |
PDF Views:70
Authors
Affiliations
1 Department of Pharmaceutics, R.R College of Pharmacy, Chikkabanavara, Bangalore-560 090, KA, IN
2 Sri Venkateswara College of Pharmacy, Chittoor- 517 127, AP, IN
3 Department of Chemistry, JNTUA, Anantapur- 515 001, AP, IN
1 Department of Pharmaceutics, R.R College of Pharmacy, Chikkabanavara, Bangalore-560 090, KA, IN
2 Sri Venkateswara College of Pharmacy, Chittoor- 517 127, AP, IN
3 Department of Chemistry, JNTUA, Anantapur- 515 001, AP, IN
Source
Journal of Pharmaceutical Research, Vol 16, No 2 (2017), Pagination: 110-119Abstract
The delivery of drug through buccal mucosa provides potential advantages like prevention of enzymatic degradation in gastro intestinal tract and bypassing hepatic first-pass metabolism. However the significant aspect in transbuccal drug delivery is the very restrictive passage of drug through the buccal mucosa. In our earlier work we confirmed the ability of Carbamazepine (CBZ) to permeate through the porcine buccal mucosa. Our earlier study proved that CBZ crosses the membrane by passive diffusion. But the measured Flux (Js) and permeation coefficient (Kp) of CBZ was s p insufficient to achieve plasma therapeutic concentration. In this study an approach was made to improve permeability of CBZ using some bile salts as chemical permeation enhancers like sodium taurocholate (STC) and sodium taurodeoxycholate (STDC) which are capable to lessening the barrier property of the mucosal tissue. These patches were subjected to ex vivo permeation studies. The six buccal patches of CBZ selected from our earlier reported formulations were subjected to this permeability improvement study. These patches were either based on HPMC K15M or Carbopol 934p or Chitosan in combination of PVA or PVP K30 or Sodium alginate. The significant change in Js and Kp of formulations in presence and absence of chemical permeation enhancers STC or STDC (in two different p concentrations 0.1% and 0.5 % w/w) was evaluated by ex vivo permeation studies through porcine buccal mucosa under modified Franz diffusion cell. The calculated value of Flux (Js) and Permeation coefficient (Kp) confirmed that s there was a significant increase in permeated amount of CBZ after the inclusion of permeation enhancers. The compatibility of bile salts with buccal mucosa was examined by histological studies and kinetic studies.Keywords
Carbamazepine, Buccal Patch, Permeation Enhancer, Bile Salt.Full Text
References
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- William R. Garnet JLB, Michael D. Egeberg, sarah L.Johnson, . Carbamazepine In: Murphy JE, editor. Clinical Pharmacokinetics 2nd ed. Bethesda, MD.: ASHP; 2001. p. 174.
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- Lin H, Gebhardt M, Bian S, Kwon KA, Shim CK, Chung SJ, et al. Enhancing effect of surfactants on fexofenadine.HCl transport across the human nasal epithelial cell monolayer. International Journal of Pharmaceutics. 2007;330(1-2):23-31.
- Neubert R. Ion Pair Transport Across Membranes. Pharmaceutical Research 1989;6(9):743-47.
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- Camenisch G, Alsenz J, van de Waterbeemd H, Folkers G. Estimation of permeability by passive diffusion through Caco-2 cell monolayers using the drugs' lipophilicity and molecular weight. European journal of pharmaceutical sciences : official journal of the European Federation for Pharmaceutical Sciences. 1998;6(4):317-24.
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- Mashru R, Sutariya V, Sankalia M, Sankalia J. Transbuccal delivery oflamotrigine across porcine buccal mucosa: in vitro determination of routes of buccal transport. Journal of pharmacy & pharmaceutical sciences : a publication of the Canadian Society for Pharmaceutical Sciences, Societe canadienne des sciences pharmaceutiques 2005;8(1):54-62.
- Sandri G, Poggi P, Bonferoni MC, Rossi S, Ferrari F, Caramella C. Histological evaluation of buccal penetration enhancement properties of chitosan and trimethyl chitosan. The Journal of pharmacy and pharmacology . 2006;58(10):1327-36.
- Li X, Cooper MA. Measurement of drug lipophilicity and pKa using acoustics. Analytical chemistry. 2012;84(6):2609-13.
- Yamsani VV, Gannu R, Kolli C, Rao ME, Yamsani MR. Development and in vitro evaluation of buccoadhesive carvedilol tablets. Acta Pharm .2007;57(2):185-97.
- Xiang J, Fang X, Li X. Transbuccal delivery of 2',3'-dideoxycytidine: in vitro permeation study and histological investigation. International Journal of Pharmaceutics 2002;231(1):57-66.
- Erode Subramanian Raja Gopal (1936–2018)
Abstract Views :181 |
PDF Views:84
Authors
Affiliations
1 School of Natural Sciences and Engineering, National Institute of Advanced Studies, Indian Institute of Science Campus, Bengaluru 560 012, IN
2 Department of Physics, Banaras Hindu University, Varanasi 221 005, IN
1 School of Natural Sciences and Engineering, National Institute of Advanced Studies, Indian Institute of Science Campus, Bengaluru 560 012, IN
2 Department of Physics, Banaras Hindu University, Varanasi 221 005, IN
Source
Current Science, Vol 115, No 11 (2018), Pagination: 2166-2167Abstract
Professor E. S. Raja Gopal, popularly known as ESR to all of us, a well-known experimental condensed matter physicist of the Department of Physics, Indian Institute of Science (IISc), Bengaluru passed away on 15 November 2018 at the IISc campus. His demise brings to an end of an era of high-quality indigenously trained physicists with a lifetime commitment to the subject and to its spread in the country (of the sort IISc seemed to host in numbers). He was an exemplar, in the sixties and seventies, of world-class instrumentation confronting cutting-edge problems of physics under conditions of almost no financial support.Full Text
- Dwarka Nath Bose (1938–2020)
Abstract Views :183 |
PDF Views:69
Authors
Affiliations
1 School of Natural Sciences and Engineering, National Institute of Advanced Studies, Indian Institute of Science Campus, Bengaluru 560 012, IN
1 School of Natural Sciences and Engineering, National Institute of Advanced Studies, Indian Institute of Science Campus, Bengaluru 560 012, IN
Source
Current Science, Vol 119, No 5 (2020), Pagination: 869-870Abstract
No Abstract.Full Text
- Aiyasami Jayaraman (1926–2022)
Abstract Views :188 |
PDF Views:86
Authors
Affiliations
1 School of Natural Sciences and Engineering, National Institute of Advanced Studies, Indian Institute of Science Campus, Bengaluru 560 012, IN
2 Department of Physics, Indian Institute of Science, Bengaluru 560 012, IN
3 School of Engineering and Applied Sciences, Harvard University, Cambridge, Mass., US
1 School of Natural Sciences and Engineering, National Institute of Advanced Studies, Indian Institute of Science Campus, Bengaluru 560 012, IN
2 Department of Physics, Indian Institute of Science, Bengaluru 560 012, IN
3 School of Engineering and Applied Sciences, Harvard University, Cambridge, Mass., US
Source
Current Science, Vol 122, No 8 (2022), Pagination: 990-992Abstract
No Abstract.Keywords
No KeywordsFull Text
- Human Future in Digital Era. N. P. Chaubey and D. M. Diwakar
Abstract Views :153 |
PDF Views:72
Authors
Affiliations
1 School of Natural Sciences and Engineering, National Institute of Advanced Studies, Indian Institute of Science Campus, Bengaluru 560 012, India, IN
1 School of Natural Sciences and Engineering, National Institute of Advanced Studies, Indian Institute of Science Campus, Bengaluru 560 012, India, IN
Source
Current Science, Vol 123, No 12 (2022), Pagination: 1519-1520Abstract
No Abstract.Full Text
- Clay minerals and the adsorption of fullerenes: clues from iridium-enriched Cretaceous–Palaeogene Anjar intertrappean beds, Kachchh district, Gujarat, India
Abstract Views :128 |
PDF Views:79
Authors
Affiliations
1 CSIR-National Geophysical Research Institute, Hyderabad 500 007, India; Academy of Scientific and Innovative Research, Ghaziabad 201 002, India, IN
2 School of Natural Sciences and Engineering, National Institute of Advanced Studies, Indian Institute of Science Campus, Bengaluru 560 012, India, IN
1 CSIR-National Geophysical Research Institute, Hyderabad 500 007, India; Academy of Scientific and Innovative Research, Ghaziabad 201 002, India, IN
2 School of Natural Sciences and Engineering, National Institute of Advanced Studies, Indian Institute of Science Campus, Bengaluru 560 012, India, IN
Source
Current Science, Vol 124, No 1 (2023), Pagination: 87-93Abstract
Here we present powder X-ray diffraction (XRD) and Fourier transform infrared (FT-IR) spectroscopic data on clay minerals associated with the iridium (Ir)-enriched and fullerene-bearing yellowish-brown clayey layers of the Anjar intertrappean beds, Kachchh district, Gujarat, India. The objective is to understand the role of clay minerals composition in preserving the fullerene molecules and Ir contents in the Anjar intertrappean beds. XRD patterns show the presence of smectite along with palygorskite and sepiolite. FT-IR spectra also confirm the presence of these Mg-rich clay minerals and broadened peaks indicate their nanocrystalline nature. The study shows a correlation between the nature of smectites and the occurrence of fullerenes and iridiumFull Text
References
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1 School of Natural Sciences and Engineering, National Institute of Advanced Studies, Indian Institute of Science Campus, Bengaluru 560 012, India., IN
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Current Science, Vol 124, No 7 (2023), Pagination: 863-864Abstract
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- Kullaiah Byrappa (1954–2023)
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1 School of Natural Sciences and Engineering, National Institute of Advanced Studies, Bengaluru 560 012, IN
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Current Science, Vol 125, No 4 (2023), Pagination: 446-446Abstract
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References
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