Search Results - (Author, Cooperation:D. Das)
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1Latest Papers from Table of Contents or Articles in PressDelino, N. S., Aoki, M., Hayashi, H., Hattori, S.-i., Chang, S. B., Takamatsu, Y., Martyr, C. D., Das, D., Ghosh, A. K., Mitsuya, H.
The American Society for Microbiology (ASM)
Published 2018Staff ViewPublication Date: 2018-04-27Publisher: The American Society for Microbiology (ASM)Print ISSN: 0066-4804Electronic ISSN: 1098-6596Topics: BiologyMedicinePublished by: -
2Latest Papers from Table of Contents or Articles in PressTan, Y., Lam, T. T.-Y., Heberlein-Larson, L. A., Smole, S. C., Auguste, A. J., Hennigan, S., Halpin, R. A., Fedorova, N., Puri, V., Stockwell, T. B., Shilts, M. H., Andreadis, T., Armstrong, P. M., Tesh, R. B., Weaver, S. C., Unnasch, T. R., Ciota, A. T., Kramer, L. D., Das, S. R.
The American Society for Microbiology (ASM)
Published 2018Staff ViewPublication Date: 2018-05-30Publisher: The American Society for Microbiology (ASM)Print ISSN: 0022-538XElectronic ISSN: 1098-5514Topics: MedicinePublished by: -
3Latest Papers from Table of Contents or Articles in PressKim, G.-D., Das, R., Rao, X., Zhong, J., Deiuliis, J. A., Ramirez-Bergeron, D. L., Rajagopalan, S., Mahabeleshwar, G. H.
The American Society for Microbiology (ASM)
Published 2018Staff ViewPublication Date: 2018-02-14Publisher: The American Society for Microbiology (ASM)Print ISSN: 0270-7306Electronic ISSN: 1098-5549Topics: BiologyMedicinePublished by: -
4Latest Papers from Table of Contents or Articles in PressJones, A. T., Chamcha, V., Kesavardhana, S., Shen, X., Beaumont, D., Das, R., Wyatt, L. S., La; Branche, C. C., Stanfield-Oakley, S., Ferrari, G., Montefiori, D. C., Moss, B., Tomaras, G. D., Varadarajan, R., Amara, R. R.
The American Society for Microbiology (ASM)
Published 2018Staff ViewPublication Date: 2018-02-14Publisher: The American Society for Microbiology (ASM)Print ISSN: 0022-538XElectronic ISSN: 1098-5514Topics: MedicinePublished by: -
5Latest Papers from Table of Contents or Articles in PressP. van der Harst ; W. Zhang ; I. Mateo Leach ; A. Rendon ; N. Verweij ; J. Sehmi ; D. S. Paul ; U. Elling ; H. Allayee ; X. Li ; A. Radhakrishnan ; S. T. Tan ; K. Voss ; C. X. Weichenberger ; C. A. Albers ; A. Al-Hussani ; F. W. Asselbergs ; M. Ciullo ; F. Danjou ; C. Dina ; T. Esko ; D. M. Evans ; L. Franke ; M. Gogele ; J. Hartiala ; M. Hersch ; H. Holm ; J. J. Hottenga ; S. Kanoni ; M. E. Kleber ; V. Lagou ; C. Langenberg ; L. M. Lopez ; L. P. Lyytikainen ; O. Melander ; F. Murgia ; I. M. Nolte ; P. F. O'Reilly ; S. Padmanabhan ; A. Parsa ; N. Pirastu ; E. Porcu ; L. Portas ; I. Prokopenko ; J. S. Ried ; S. Y. Shin ; C. S. Tang ; A. Teumer ; M. Traglia ; S. Ulivi ; H. J. Westra ; J. Yang ; J. H. Zhao ; F. Anni ; A. Abdellaoui ; A. Attwood ; B. Balkau ; S. Bandinelli ; F. Bastardot ; B. Benyamin ; B. O. Boehm ; W. O. Cookson ; D. Das ; P. I. de Bakker ; R. A. de Boer ; E. J. de Geus ; M. H. de Moor ; M. Dimitriou ; F. S. Domingues ; A. Doring ; G. Engstrom ; G. I. Eyjolfsson ; L. Ferrucci ; K. Fischer ; R. Galanello ; S. F. Garner ; B. Genser ; Q. D. Gibson ; G. Girotto ; D. F. Gudbjartsson ; S. E. Harris ; A. L. Hartikainen ; C. E. Hastie ; B. Hedblad ; T. Illig ; J. Jolley ; M. Kahonen ; I. P. Kema ; J. P. Kemp ; L. Liang ; H. Lloyd-Jones ; R. J. Loos ; S. Meacham ; S. E. Medland ; C. Meisinger ; Y. Memari ; E. Mihailov ; K. Miller ; M. F. Moffatt ; M. Nauck ; M. Novatchkova ; T. Nutile ; I. Olafsson ; P. T. Onundarson ; D. Parracciani ; B. W. Penninx ; L. Perseu ; A. Piga ; G. Pistis ; A. Pouta ; U. Puc ; O. Raitakari ; S. M. Ring ; A. Robino ; D. Ruggiero ; A. Ruokonen ; A. Saint-Pierre ; C. Sala ; A. Salumets ; J. Sambrook ; H. Schepers ; C. O. Schmidt ; H. H. Sillje ; R. Sladek ; J. H. Smit ; J. M. Starr ; J. Stephens ; P. Sulem ; T. Tanaka ; U. Thorsteinsdottir ; V. Tragante ; W. H. van Gilst ; L. J. van Pelt ; D. J. van Veldhuisen ; U. Volker ; J. B. Whitfield ; G. Willemsen ; B. R. Winkelmann ; G. Wirnsberger ; A. Algra ; F. Cucca ; A. P. d'Adamo ; J. Danesh ; I. J. Deary ; A. F. Dominiczak ; P. Elliott ; P. Fortina ; P. Froguel ; P. Gasparini ; A. Greinacher ; S. L. Hazen ; M. R. Jarvelin ; K. T. Khaw ; T. Lehtimaki ; W. Maerz ; N. G. Martin ; A. Metspalu ; B. D. Mitchell ; G. W. Montgomery ; C. Moore ; G. Navis ; M. Pirastu ; P. P. Pramstaller ; R. Ramirez-Solis ; E. Schadt ; J. Scott ; A. R. Shuldiner ; G. D. Smith ; J. G. Smith ; H. Snieder ; R. Sorice ; T. D. Spector ; K. Stefansson ; M. Stumvoll ; W. H. Tang ; D. Toniolo ; A. Tonjes ; P. M. Visscher ; P. Vollenweider ; N. J. Wareham ; B. H. Wolffenbuttel ; D. I. Boomsma ; J. S. Beckmann ; G. V. Dedoussis ; P. Deloukas ; M. A. Ferreira ; S. Sanna ; M. Uda ; A. A. Hicks ; J. M. Penninger ; C. Gieger ; J. S. Kooner ; W. H. Ouwehand ; N. Soranzo ; J. C. Chambers
Nature Publishing Group (NPG)
Published 2012Staff ViewPublication Date: 2012-12-12Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsKeywords: Animals ; Cell Cycle/genetics ; Cytokines/metabolism ; Drosophila melanogaster/genetics ; Erythrocytes/cytology/*metabolism ; Female ; Gene Expression Regulation/genetics ; *Genetic Loci ; *Genome-Wide Association Study ; Hematopoiesis/genetics ; Hemoglobins/genetics ; Humans ; Male ; Mice ; Organ Specificity ; *Phenotype ; Polymorphism, Single Nucleotide/genetics ; RNA Interference ; Signal Transduction/geneticsPublished by: -
6Latest Papers from Table of Contents or Articles in PressT. Sonati ; R. R. Reimann ; J. Falsig ; P. K. Baral ; T. O'Connor ; S. Hornemann ; S. Yaganoglu ; B. Li ; U. S. Herrmann ; B. Wieland ; M. Swayampakula ; M. H. Rahman ; D. Das ; N. Kav ; R. Riek ; P. P. Liberski ; M. N. James ; A. Aguzzi
Nature Publishing Group (NPG)
Published 2013Staff ViewPublication Date: 2013-08-02Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsKeywords: Amino Acid Sequence ; Animals ; Antibodies/*immunology/*toxicity ; Antibodies, Monoclonal/immunology/toxicity ; Binding Sites, Antibody ; Calpain/metabolism ; Cerebellum ; Creutzfeldt-Jakob Syndrome/metabolism ; Cross-Linking Reagents ; Epitope Mapping ; Female ; Immunoglobulin Fab Fragments/immunology/toxicity ; In Vitro Techniques ; Ligands ; Male ; Membrane Glycoproteins/metabolism ; Mice ; Molecular Sequence Data ; NADPH Oxidase/metabolism ; Neurodegenerative Diseases/metabolism ; Oxidative Stress ; *Pliability ; PrPC Proteins/chemistry/genetics/immunology ; Prions/*chemistry/genetics/*immunology ; Reactive Oxygen Species/metabolism ; Sequence Deletion/genetics ; Single-Chain Antibodies/immunology/toxicityPublished by: -
7Latest Papers from Table of Contents or Articles in PressF. DiMaio ; T. C. Terwilliger ; R. J. Read ; A. Wlodawer ; G. Oberdorfer ; U. Wagner ; E. Valkov ; A. Alon ; D. Fass ; H. L. Axelrod ; D. Das ; S. M. Vorobiev ; H. Iwai ; P. R. Pokkuluri ; D. Baker
Nature Publishing Group (NPG)
Published 2011Staff ViewPublication Date: 2011-05-03Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsKeywords: Computational Biology/*methods ; Crystallography, X-Ray ; Databases, Protein ; Electrons ; *Models, Molecular ; Proteins/*chemistry ; Sequence Alignment ; Sequence Homology, Amino Acid ; *Structural Homology, ProteinPublished by: -
8Articles: DFG German National LicensesChatterjee, A. ; Datta, A. ; Giri, Anit K. ; Das, D. ; Chakravorty, D.
[S.l.] : American Institute of Physics (AIP)
Published 1992Staff ViewISSN: 1089-7550Source: AIP Digital ArchiveTopics: PhysicsNotes: Iron particles having diameters around 8 nm and loosely packed with nanosized copper particles have been prepared by a sol-gel route. The samples exhibit coercivities in the range 200 to 500 Oe that are typical of single-domain iron grains. The Mössbauer spectrum is consistent with the presence of α-Fe particles in the system. However, a finite value of the isomer shift is obtained that is ascribed to possible electron transfer between the iron atoms and the surrounding copper matrix.Type of Medium: Electronic ResourceURL: -
9Articles: DFG German National LicensesDas, D. ; Pal, M. ; Di Bartolomeo, E. ; Traversa, E. ; Chakravorty, D.
[S.l.] : American Institute of Physics (AIP)
Published 2000Staff ViewISSN: 1089-7550Source: AIP Digital ArchiveTopics: PhysicsNotes: Nickel–silica nanocomposites were prepared by the sol-gel route. By subjecting these to an oxidation treatment in the temperature range 723–1023 K, nickel oxide films of estimated thicknesses in the range 0.5–1.5 nm were grown on the nickel nanoparticles. dc electrical resistivity was measured in the temperature range 300–570 K. The data indicate that an amorphous phase in the interfacial region of the oxide-coated nickel nanoparticles determines the electrical conduction. A small polaron hopping conduction is found to be operative. The humidity sensing properties of these nanocomposites were measured at 300 K in the range of relative humidity (RH) from 3% to 87%. Electrical conductance in all specimens showed an increase of about three orders of magnitude as the RH was raised. Specimens subjected to higher oxidation treatment showed a higher conductance for a specific value of RH. This is ascribed to the presence of a larger number of Ni3+ ions in such specimens. © 2000 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
10Articles: DFG German National LicensesStaff View
ISSN: 1089-7550Source: AIP Digital ArchiveTopics: PhysicsNotes: Iron nanoparticles with a shell of Fe3O4 phase with a total diameter of 5.3 nm have been grown within a silica gel matrix in the percolative configuration by suitable reduction followed by oxidation treatments. dc electrical resistivity measurements were carried out in the temperature range 80–300 K. The resistivity of the nanocomposites was found to be about 7 orders of magnitude lower than that of the reference gel. The electrical conduction has been explained on the basis of a small polaron hopping mechanism. The activation energy in the case of the composites was calculated from experimental data to be about one-fifth that for the reference sample. An interfacial amorphous phase is believed to cause such reduction in resistivity. The effective dielectric constant of this phase was estimated to be about four times that of the reference glass. Magnetization measurements on these specimens were carried out in the temperature range 5–300 K both in zero field cooled and field cooled states. A peak in the magnetization at ∼120 K was ascribed to an order–disorder (Verwey) transition. Another peak at ∼55 K was explained as arising due to a spin glass like disorder at the interface between the ferromagnetic iron ores and the ferrimagnetic Fe3O4 shell. A loop shift was observed as a result of the spin freezing below this temperature. © 2002 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
11Articles: DFG German National LicensesChatterjee, A. ; Das, D. ; Chakravorty, D. ; Choudhury, K.
Woodbury, NY : American Institute of Physics (AIP)
Published 1990Staff ViewISSN: 1077-3118Source: AIP Digital ArchiveTopics: PhysicsNotes: Ultrafine iron particles prepared by a sol-gel route are characterized by Mössbauer spectroscopy and transmission electron microscopy. The Mössbauer absorption patterns consist of a ferromagnetic component superposed on a superparamagnetic doublet. The intensity of the superparamagnetic doublet is found to be larger for particles having smaller average diameter. For very fine particles a diffused electron diffraction pattern is observed. It is also shown that the sol-gel technique could be used to prepare fine particles of a Fe-Cr alloy.Type of Medium: Electronic ResourceURL: -
12Articles: DFG German National LicensesStaff View
ISSN: 1089-7550Source: AIP Digital ArchiveTopics: PhysicsNotes: Highly aligned SmCo5 deposits were produced using plasma spraying. c-axis alignment, normal to the plane of the deposit, was achieved by depositing the Sm-Co alloys on steel substrates maintained at high temperatures. The substrates were heated by the plasma flame to obtain the high temperatures. The attainment of a range of substrate temperatures was made possible through control over the geometry of the substrate.Type of Medium: Electronic ResourceURL: -
13Articles: DFG German National LicensesStaff View
ISSN: 1077-3118Source: AIP Digital ArchiveTopics: PhysicsNotes: Oxidation of amorphous silicon (a-Si) nanoparticles grown by plasma-enhanced chemical vapor deposition were investigated. Their hydrogen content has a great influence on the oxidation rate at low temperature. When the mass gain is recorded during a heating ramp in dry air, an oxidation process at low temperature is identified with an onset around 250 °C. This temperature onset is similar to that of hydrogen desorption. It is shown that the oxygen uptake during this process almost equals the number of hydrogen atoms present in the nanoparticles. To explain this correlation, we propose that oxidation at low temperature is triggered by the process of hydrogen desorption. © 2001 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
14Articles: DFG German National LicensesStaff View
ISSN: 1077-3118Source: AIP Digital ArchiveTopics: PhysicsNotes: Nanometer-sized copper particles have been grown within a gel derived glass in the system 60 CuO, 40 SiO2 (mole %). By heat treatment at temperatures in the range of 450–850 °C, copper oxide shells of thickness varying from 1.1 to 1.7 nm have been produced. DC resistivity measurements carried out over the temperature range of 30–300 °C show a drastically reduced activation energy as compared to that of a reference sample with the above composition. This is ascribed to the presence of an interfacial amorphous phase generated by the assembly of nanosized copper oxide particles. © 2000 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
15Articles: DFG German National LicensesCORDIS, G. ; PRASAD, R. ; OTANI, H. ; DAS, D. K.
Oxford, UK : Blackwell Publishing Ltd
Published 1988Staff ViewISSN: 1749-6632Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: Natural Sciences in GeneralType of Medium: Electronic ResourceURL: -
16Articles: DFG German National LicensesFrancis, I. M. ; Das, D. K. ; Luthra, U. K. ; Sheikh, Z. ; Sheikh, M. ; Bashir, M.
Oxford, UK : Blackwell Science Ltd
Published 1999Staff ViewISSN: 1365-2303Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: MedicineNotes: FNAC is a simple diagnostic tool for the initial evaluation of various deep seated pathological lesions. This study describes the applicability and practical aspects of the technique in establishing the diagnosis of spinal tuberculosis (TB) with the aid of radiographic guidance. The study was conducted in a major teaching hospital in Kuwait between the years 1985 and 1994. Twenty-nine patients (M:F = 18:11 and age range 8–72 years) with clinically and/or radiologically suspected spinal TB were seen in the Department of Cytology, Mubarak Al Kabeer Hospital. The patients were re-examined by either computed tomography (CT) scanning (n = 19) or fluoroscopy (n = 10) to localize the lesion for FNAC. FNAC smears were routinely stained with Papanicolaou and Diff Quik stains and one smear of each case was stained with Ziehl–Neelsen (Z-N) stain for acid-fast bacilli (AFB). Aspirated purulent material or syringe washings of dry aspirates were also submitted for microbiological cultures including AFB. Radiological and cytological findings were recorded in each case. Radiological findings included: bony rarefaction and destruction (93.1%), narrowed disc space (89.7%), soft tissue calcification (65.5%) and para-vertebral abscess formation (51.7%). Cytological findings included: epithelioid cell granulomas (89.7%), granular necrotic background (82.8%) and lymphocytic infiltration (75.9%). Smears were positive for AFB in 51.7% of cases. A positive AFB culture was obtained in 82.8% of cases, including all cases with positive AFB on smear by Z-N stain. Radiologically guided FNAC with AFB culture is a simple, reliable and practical approach to diagnosing spinal TB lesions. With a high diagnostic yield, it allows immediate initiation of specific treatment, helps to avoid invasive diagnostic procedures, and decreases hospitalization time.Type of Medium: Electronic ResourceURL: -
17Articles: DFG German National LicensesSiqueira, J. F. ; Silva, C. H. F. Pereira ; Cerqueira, M. das D. O. ; Lopes, H. P. ; Uzeda, M.
Oxford, UK : Blackwell Publishing Ltd
Published 1998Staff ViewISSN: 1600-0595Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: MedicineNotes: Abstract— Gutta-percha cones should be free of pathogenic microorganisms before being used for root canal filling. This study was canied out to evaluate the effectiveness of four chemical agents in eliminating Bacillus subtilis spores from gutta-percha cones. The solutions tested were 5.25% sodium hypochlorite, 2% glutaraldehyde, 2% chlorhexidine digluconate, and 70% ethyl alcohol. The gutta-percha cones coated with spores were placed into contact with the chemical agents for 1, 3, 5 and 10 min. The results showed that 5.25% sodium hypochlorite was effective in destroying the spores after 1 min of contact. Glutaraldehyde, chlorhexidine and ethyl alcohol did not decontaminate the gutta-percha cones even after 10 min of contact.Type of Medium: Electronic ResourceURL: -
18Articles: DFG German National LicensesDas, D. ; Senapati, S. ; Chandra, A.
College Park, Md. : American Institute of Physics (AIP)
Published 1999Staff ViewISSN: 1089-7690Source: AIP Digital ArchiveTopics: PhysicsChemistry and PharmacologyNotes: A nonlinear theory for the calculation of density and polarization of dipolar solvents near charged surfaces is developed by using a density functional approach. The theory is based on a weighted density approximation for the isotropic part of the density and the anisotropic (or dipolar) part is calculated by using a perturbative approach. The theory, however, retains the full nonlinear dependence on the surface charge density or the external field. Explicit numerical results are obtained for different values of the external field. It is found that the number density of the solvent near the surface increases with increasing surface charge density indicating the presence of electrostriction. The polarization is found to increase nonlinearly with the external field and exhibits the presence of dielectric saturation at high field strength. The predictions of the present nonlinear theory are compared with the results of Monte Carlo simulations and a good agreement is found for both the density and polarization near charged surfaces. The present simulations clearly reveal a nonlinear behavior of dipolar molecules in presence of the charged surfaces. Also, the nonlinear effects are found to be especially important for interfacial molecules, in agreement with the predictions of the analytical theory presented here. © 1999 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
19Articles: DFG German National LicensesRoy, S. ; Das, D. ; Chakravorty, D. ; Agrawal, D. C.
[S.l.] : American Institute of Physics (AIP)
Published 1993Staff ViewISSN: 1089-7550Source: AIP Digital ArchiveTopics: PhysicsNotes: Glass-metal nanocomposite powders in the systems Fe/SiO2 and Ni/SiO2 have been prepared by the sol-gel technique followed by reduction treatment. Bulk nanocomposites are then fabricated by hot pressing these powders. The metal particle diameters range from 8.9 to 14.8 nm. The materials show enhanced coercivities, e.g., a maximum of 82 Oe in the case of Ni/SiO2 and a maximum of 474 Oe in the case of Fe/SiO2 systems. The Mössbauer spectra of Fe/SiO2 samples are comprised of a ferromagnetic component superposed on a superparamagnetic doublet.Type of Medium: Electronic ResourceURL: -
20Articles: DFG German National LicensesHarboe, M. ; Das, A. K. ; Mitra, D. ; Ulvund, G. ; Ahmad, S. ; Harkness, R. E. ; Das, D. ; Mustafa, A. S. ; Wiker, H. G.
Oxford, UK; Malden , USA : Blackwell Science Ltd
Published 2004Staff ViewISSN: 1365-3083Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: MedicineNotes: The TB1-5 76C monoclonal antibody raised against a synthetic 60-mer peptide in the N-terminal part of the Mce1A mammalian cell entry protein of Mycobacterium tuberculosis has previously been shown to react with a linear epitope in the KRRITPKD region, residues 131–138 in Mce1A, and to cross-react with Mce1F. Six additional monoclonal antibodies raised against the same peptide were also shown to cross-react with Mce1F. Four of them reacted with a linear epitope in the same area, indicating that this area is immunodominant but showed distinct differrences in fine specificity. Two monoclonal antibodies did not react with synthetic peptides from this region on the solid phase in enzyme-linked immunosorbent assay, indicating greater influence of conformation on reactivity. None of the monoclonal antibodies reacted with 14-mer synthetic peptides from the corresponding area in Mce2A, Mce3A, Mce4A, M. avium, M. smegmatis or M. leprae. The reaction pattern of the monoclonal antibodies was analysed in relation to our model of the Mce1A molecule (AK Das et al. Biochem Biophys Res Commun 2003;302:442–7).The epitope is located on the surface of Mce1A, at the distal β-strand-loop region in the β-domain supporting its potential role in promoting uptake of M. tuberculosis in host cells. Monoclonal antibody TB1-5 19C cross-reacted with glutathione S-transferase of Schistosoma japonicum containing a PKE triplet. Monoclonal antibody TB1-5 76C gave a major band at about 44 kDa in Western blotting of M. tuberculosis sonicate, whereas polyclonal rabbit anti-Mce1A peptide antibodies reacting with the extended TTPKNPTKRRITPKDVI area of Mce1A showed a distinct band above the 160 kDa molecular mass standard.Type of Medium: Electronic ResourceURL: