Browsing by Author "S. Patil"

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Enhancement in electrical and magnetic properties with Ti-doping in Bi0.5La0.5Fe0.5Mn0.5O3
(American Institute of Physics Inc., 2017) Rahul Singh; Prince Kumar Gupta; Shiv Kumar; Amish G. Joshi; A.K. Ghosh; S. Patil; Sandip Chatterjee
In this investigation, we have synthesized Bi0.5La0.5Fe05Mn0.5-xTixO3 (where x = 0 and 0.05) samples. The Rietveld refinement of X-ray diffraction (XRD) patterns shows that the systems crystallize in the orthorhombic phase with the Pnma space group. The observed Raman modes support the XRD results. The appearance of prominent A1-3 and weak E-2 modes in Bi0.5La0.5Fe0.5Mn0.45Ti0.05O3 indicates the presence of chemically more active Bi-O covalent bonds. Ferromagnetism of Bi0.5La0.5Fe0.5Mn0.5O3 is enhanced by Ti doping at the Mn-site, indicating that these particular samples might be interesting for device applications. © 2017 Author(s).
Eribulin mesylate in Indian patients: A single center experience
(Medknow Publications, 2015) R. Thippeswamy; S. Patil; H.P. Shashidara; C.T. Satheesh; H. Vittal; S. Mishra
BACKGROUND: Eribulin mesylate is the latest addition in the armamentarium of management of metastatic breast cancer (MBC) with a unique mechanism of action. Although the multicentric EMBRACE trial suggests significant overall survival benefit from this novel drug, its effectiveness in Indian population is yet to be evaluated. MATERIALS and METHODS: Presented here is a single center experience of eight patients who were administered eribulin for MBC. Patients had received a median of 3 prior chemotherapies before eribulin administration. The median dose of eribulin therapy was 5 cycles (range: 2-6 cycles). Results: The objective response rate was 75% (CR in one and PR in five out of eight patients). Response was seen across all subtypes of patients. Eribulin was well tolerated. No serious adverse events were reported. CONCLUSION: Eribulin conferred good response rates with satisfactory tolerability profile in Indian patients. Its use in earlier lines and in combination with other drugs may achieve deeper and longer responses.
Unraveling the obscure electronic transition and tuning of Fermi level in Cu substituted Bi2Te3compound
(American Institute of Physics Inc., 2022) Sambhab Dan; Shiv Kumar; Shovan Dan; Debarati Pal; S. Patil; Abhineet Verma; Satyen Saha; Kenya Shimada; S. Chatterjee
Observation of a broad peak in the temperature (T) dependent resistivity (ρ) in Cu substituted Bi2Te3 has been reported earlier, though its origin remains obscured to date. Our investigation reveals that an electronic phase transition accompanied by Fermi level tuning primarily contributes toward the observed ρ (T). The analysis reveals that tuning of the Fermi level affects bulk transport phenomena to produce the unique ρ (T). We have proposed a model to show how the bulk bandgap can affect ρ (T). We have shown that bulk carrier contribution has a greater role in producing such ρ (T), and a detailed discussion supported by temperature dependent ARPES study, Raman study, and XPS study as well as structural study conducted by x-ray diffraction has been presented. © 2022 Author(s).