Search Results - (Author, Cooperation:A. Prakash)
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1Latest Papers from Table of Contents or Articles in PressB. Nigam, S. Mittal, A. Prakash, S. Satsangi, P. K. Mahto and Bibhu P. Swain
Institute of Physics (IOP)
Published 2018Staff ViewPublication Date: 2018-07-15Publisher: Institute of Physics (IOP)Print ISSN: 1757-8981Electronic ISSN: 1757-899XTopics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision MechanicsPublished by: -
2Latest Papers from Table of Contents or Articles in PressD. E. Neafsey ; R. M. Waterhouse ; M. R. Abai ; S. S. Aganezov ; M. A. Alekseyev ; J. E. Allen ; J. Amon ; B. Arca ; P. Arensburger ; G. Artemov ; L. A. Assour ; H. Basseri ; A. Berlin ; B. W. Birren ; S. A. Blandin ; A. I. Brockman ; T. R. Burkot ; A. Burt ; C. S. Chan ; C. Chauve ; J. C. Chiu ; M. Christensen ; C. Costantini ; V. L. Davidson ; E. Deligianni ; T. Dottorini ; V. Dritsou ; S. B. Gabriel ; W. M. Guelbeogo ; A. B. Hall ; M. V. Han ; T. Hlaing ; D. S. Hughes ; A. M. Jenkins ; X. Jiang ; I. Jungreis ; E. G. Kakani ; M. Kamali ; P. Kemppainen ; R. C. Kennedy ; I. K. Kirmitzoglou ; L. L. Koekemoer ; N. Laban ; N. Langridge ; M. K. Lawniczak ; M. Lirakis ; N. F. Lobo ; E. Lowy ; R. M. MacCallum ; C. Mao ; G. Maslen ; C. Mbogo ; J. McCarthy ; K. Michel ; S. N. Mitchell ; W. Moore ; K. A. Murphy ; A. N. Naumenko ; T. Nolan ; E. M. Novoa ; S. O'Loughlin ; C. Oringanje ; M. A. Oshaghi ; N. Pakpour ; P. A. Papathanos ; A. N. Peery ; M. Povelones ; A. Prakash ; D. P. Price ; A. Rajaraman ; L. J. Reimer ; D. C. Rinker ; A. Rokas ; T. L. Russell ; N. Sagnon ; M. V. Sharakhova ; T. Shea ; F. A. Simao ; F. Simard ; M. A. Slotman ; P. Somboon ; V. Stegniy ; C. J. Struchiner ; G. W. Thomas ; M. Tojo ; P. Topalis ; J. M. Tubio ; M. F. Unger ; J. Vontas ; C. Walton ; C. S. Wilding ; J. H. Willis ; Y. C. Wu ; G. Yan ; E. M. Zdobnov ; X. Zhou ; F. Catteruccia ; G. K. Christophides ; F. H. Collins ; R. S. Cornman ; A. Crisanti ; M. J. Donnelly ; S. J. Emrich ; M. C. Fontaine ; W. Gelbart ; M. W. Hahn ; I. A. Hansen ; P. I. Howell ; F. C. Kafatos ; M. Kellis ; D. Lawson ; C. Louis ; S. Luckhart ; M. A. Muskavitch ; J. M. Ribeiro ; M. A. Riehle ; I. V. Sharakhov ; Z. Tu ; L. J. Zwiebel ; N. J. Besansky
American Association for the Advancement of Science (AAAS)
Published 2015Staff ViewPublication Date: 2015-01-03Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsKeywords: Animals ; Anopheles/classification/*genetics ; Base Sequence ; Chromosomes, Insect/genetics ; Drosophila/genetics ; *Evolution, Molecular ; *Genome, Insect ; Humans ; Insect Vectors/classification/*genetics ; Malaria/*transmission ; Molecular Sequence Data ; Phylogeny ; Sequence AlignmentPublished by: -
3Latest Papers from Table of Contents or Articles in PressKory, N., Wyant, G. A., Prakash, G., uit de Bos, J., Bottanelli, F., Pacold, M. E., Chan, S. H., Lewis, C. A., Wang, T., Keys, H. R., Guo, Y. E., Sabatini, D. M.
American Association for the Advancement of Science (AAAS)
Published 2018Staff ViewPublication Date: 2018-11-16Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyGeosciencesComputer ScienceMedicineNatural Sciences in GeneralPhysicsKeywords: Biochemistry, Cell Biology, Online OnlyPublished by: -
4Latest Papers from Table of Contents or Articles in PressGhosh, K. K., Prakash, A., Balamurugan, V., Kumar, M.
The American Society for Microbiology (ASM)
Published 2018Staff ViewPublication Date: 2018-03-06Publisher: The American Society for Microbiology (ASM)Print ISSN: 0099-2240Electronic ISSN: 1098-5336Topics: BiologyPublished by: -
5Latest Papers from Table of Contents or Articles in PressStaff View
Publication Date: 2018-10-02Publisher: The American Association for Cancer Research (AACR)Print ISSN: 1078-0432Electronic ISSN: 1557-3265Topics: MedicinePublished by: -
6Articles: DFG German National LicensesStaff View
ISSN: 1089-7666Source: AIP Digital ArchiveTopics: PhysicsNotes: Two-dimensional nonlinear equilibrium solutions for the swept Hiemenz flow attachment line boundary layer are directly computed by solving the full Navier-Stokes equations as a nonlinear eigenvalue problem. The equations are discretized using the two-point fourth order compact scheme and the resulting nonlinear homogeneous equations are solved using the Newton-Raphson iteration technique. It is found that for Reynolds numbers larger than the linear critical Reynolds number of 583, the nonlinear neutral surfaces form open curves. The results showed that the subcritical instability exists near the upper branch neutral curve and supercritical equilibrium solutions exist near the lower branch. These conclusions are in agreement with the weakly nonlinear theory. However, at higher amplitudes away from the linear neutral points the nonlinear neutral surfaces show subcritical instability at lower and higher wave number regions. At Reynolds numbers lower than the critical value, the nonlinear neutral surfaces form closed loops. By reducing the Reynolds number, we found that the nonlinear critical point occurs at a Reynolds number of 511.3, below which all the two-dimensional disturbances will decay. The secondary instability of these equilibrium solutions is investigated using the Floquet theory. The results showed that these two-dimensional finite amplitude neutral solutions are unstable to three-dimensional disturbances. © 1998 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
7Articles: DFG German National LicensesSong, T. K. ; Aggarwal, S. ; Prakash, A. S. ; Yang, B. ; Ramesh, R.
Woodbury, NY : American Institute of Physics (AIP)
Published 1997Staff ViewISSN: 1077-3118Source: AIP Digital ArchiveTopics: PhysicsNotes: We report results on the activation field and frequency dependence of the coercive voltage in epitaxial ferroelectric thin film capacitors. Frequency dependent hysteresis loops and pulse width dependent polarization of epitaxial La0.5Sr0.5CoO3/(Pb,La)(Zr,Ti)O3/La0.5Sr0.5CoO3 capacitor structures were measured as a function of La content. The coercive voltages and their frequency dependence vary systematically with increasing La content. We show that the activation field for polarization reversal is directly related to the c/a ratio (tetragonality ratio) of the ferroelectric layer. A larger c/a ratio leads to a larger field to activate the motion of domain walls through the lattice. An important consequence of a larger activation field is a stronger pulse width dependence of the pulse switched polarization. © 1997 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
8Articles: DFG German National LicensesAggarwal, S. ; Song, T. K. ; Dhote, A. M. ; Prakash, A. S. ; Ramesh, R.
[S.l.] : American Institute of Physics (AIP)
Published 1998Staff ViewISSN: 1089-7550Source: AIP Digital ArchiveTopics: PhysicsNotes: In earlier publications, we have demonstrated that La0.5Sr0.5CoO3 electrodes dramatically improve the phase stability and electrical properties of lead based ferroelectric capacitors. This study evaluates the influence of deviation from the cationic stoichiometry, La/Sr=1, on the ferroelectric properties. Polycrystalline Pb(Nb0.04Zr0.18Ti0.78)O3 based capacitors were fabricated with La0.5Sr0.5CoO3 as the bottom electrode and either La0.5Sr0.5CoO3 or La0.85Sr0.15CoO3 as the top electrode. The as-grown capacitors with La0.85Sr0.15CoO3 as the top electrode were slightly asymmetric about the voltage axis. However, the asymmetry did not increase when the capacitors were subjected to single side pulses and temperature. Both capacitor structures showed good fatigue (no fatigue up to 1011 cycles), retention, and imprint characteristics. Detailed pulse width and voltage dependent measurements were also carried out to further understand the impact of the change in electrode composition. The polarization values at 1 μs pulse width were as large as 13 μC/cm2, though the dependence was steeper for capacitors with asymmetric electrodes. The resistance to switching during polarization reversal, formally termed activation field, α, was measured from the switching current dependence of the applied field. These values were slightly larger for the capacitors with asymmetric electrodes. The data indicate that the ferroelectric properties of the capacitor are almost not influenced by a change of the top electrode from La0.5Sr0.5CoO3 to La0.85Sr0.15CoO3.© 1998 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
9Articles: DFG German National LicensesStaff View
ISSN: 1471-0528Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: MedicineType of Medium: Electronic ResourceURL: -
10Articles: DFG German National LicensesStaff View
ISSN: 1471-0528Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: MedicineNotes: A series of 201 cases delivered at Worcester Royal Infirmary with the vacuum extractor in which intervention was begun before full dilatation of the cervix has been analyzed. Successful delivery was achieved with the ventouse alone in 174 cases (86·8 per cent). In almost half of the remainder, Caesarean section was required because of cephalo-pelvic disproportion which was not evident when delivery was undertaken. The results for mother and child were satisfactory in that there were only three stillbirths and no neonatal deaths. There was no serious maternal or fetal morbidity.Type of Medium: Electronic ResourceURL: -
11Articles: DFG German National LicensesPrakash, A. ; Chalmers, J. A. ; Onojobi, O. I. A. ; Henderson, R. J. ; Cummings, P.
Oxford, UK : Blackwell Publishing Ltd
Published 1970Staff ViewISSN: 1471-0528Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: MedicineNotes: Limecycline was given by mouth 6-hourly and cephaloridine was given intramuscularly 12-hourly in two doses to 60 women undergoing amniotomy for induction of labour in order to study the absorption and transfer of the antibiotics to the fetus as a protection against intrapartum infections.Both drugs were shown to provide useful inhibitory concentrations in maternal serum, amniotic fluid and umbilical cord blood.The advantages and disadvantages of the two drugs, and the appropriate dose schemes for each antibiotic are discussed.Type of Medium: Electronic ResourceURL: -
12Articles: DFG German National LicensesJenkins, I. G. ; Song, T. K. ; Madhukar, S. ; Prakash, A. S. ; Aggarwal, S. ; Ramesh, R.
Woodbury, NY : American Institute of Physics (AIP)
Published 1998Staff ViewISSN: 1077-3118Source: AIP Digital ArchiveTopics: PhysicsNotes: We report results of high-speed polarization relaxation measurements in ferroelectric thin film capacitors. Polarization relaxation has been reported to occur in two distinct time regimes, one for relaxation times in the range of a few milliseconds and a second for longer relaxation times. We find that the polarization relaxation in the first regime is governed by at least two different physical processes, namely depoling fields and the activation field for switching. Using prototypical epitaxial PbZr0.2Ti0.8O3 and Pb0.9La0.1Zr0.2Ti0.8O3 test capacitors, we demonstrate the effect of film microstructure and switching speed on the relaxation dynamics in the first regime. © 1998 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
13Articles: DFG German National LicensesStaff View
ISSN: 1750-3841Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, NutritionProcess Engineering, Biotechnology, Nutrition TechnologyNotes: : As irradiation dosage increased from 0 to 0.5, 1.0, 2.0, and 3.0 kGy, total volatile compounds increased by 12%, 15%, 24%, and 54%, respectively. Sensory evaluation showed that irradiated orange juice was significantly different from the nonirradiated control orange juice (P 〈 0.05). Dimethyl sulfide, dimethyl disulfide, and 2-butanone were found in irradiated orange juice but not in nonirradiated samples. As irradiation dosage increased, dimethyl sulfide and dimethyl disulfide increased, and off-odor increased. Chemical mechanisms for the formation of dimethyl sulfide and dimethyl disulfide by irradiation are proposed. Dimethyl disulfide, dimethyl sulfide, and possibly other sulfur-containing compounds seem to be partly responsible for the off-odor in irradiated orange juice.Type of Medium: Electronic ResourceURL: -
14Articles: DFG German National LicensesFoley, D.M. ; Pickett, K. ; Varon, J. ; Lee, J. ; Mln, D.B. ; Caporaso, R. ; Prakash, A.
Oxford, UK : Blackwell Publishing Ltd
Published 2002Staff ViewISSN: 1750-3841Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, NutritionProcess Engineering, Biotechnology, Nutrition TechnologyNotes: Recent concern about the presence of disease-causing bacteria in unpasteurized juice has highlighted the need to develop alternative means of pathogen control that preserve sensory properties and nutrient content. The objectives of this study were to determine the effects of different doses of gamma irradiation on reducing the microbial pathogens L. monocytogenes and Salmonella enterica in fresh orange juice, and to determine whether significant reduction could be achieved without compromising sensory qualities. While irradiation was effective in destroying pathogens, the development of off flavors precludes its use as an alternative processing technology.Type of Medium: Electronic ResourceURL: -
15Articles: DFG German National LicensesPrakash, A. ; Guner, A.R. ; Caporaso, F. ; Foley, D.M.
Oxford, UK : Blackwell Publishing Ltd
Published 2000Staff ViewISSN: 1750-3841Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, NutritionProcess Engineering, Biotechnology, Nutrition TechnologyNotes: Cut romaine lettuce, packaged under modified atmosphere, was subjected to 0.15 and 0.35 kGy gamma irradiation. Irradiation at 0.35 kGy decreased aerobic plate counts by 1.5 logs and yeast and mold counts by 1 log; these differences were maintained through the 22-d storage. Irradiation at 0.15 kGy caused smaller reductions in microbial counts. A decrease in headspace CO2 was observed in the 0.35-kGy-treated lettuce, although CO2 concentrations increased in all samples with storage. O2 concentration was not affected by irradiation. Ten percent loss in firmness was observed at 0.35 kGy, while other sensory attributes such as color, generation of off-flavor, and appearance of visual defects were not affected.Type of Medium: Electronic ResourceURL: -
16Articles: DFG German National LicensesPrakash, A. ; Inthajak, P. ; Huibregtse, H. ; Caporaso, F. ; Foley, D.M.
Oxford, UK : Blackwell Publishing Ltd
Published 2000Staff ViewISSN: 1750-3841Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, NutritionProcess Engineering, Biotechnology, Nutrition TechnologyNotes: : The effects of 0.5 and 1.0 kGy gamma irradiation on microbial and sensory characteristics of diced celery were compared to conventional treatments such as acidification, blanching, and chlorination. Aerobic plate counts for the irradiated celery did not exceed 107 CFU/g, in contrast, the acidified, blanched, chlorinated, and control samples surpassed aerobic microbial counts of 108 CFU/g in 22, 19, 12, and 8 d, respectively. Importantly, the 1.0-kGy treatment eliminated inoculated Listeria monocytogenes and E. coli. While the acidified and blanched samples had significantly different sensory profiles compared to the other treatments, the irradiated samples maintained their color, texture, and aroma longer and were preferred in the sensory tests. The sensory shelf life of the 1.0-kGy-treated celery was 29 d compared to 22 d for the control, chlorinated, and 0.5 kGy, and 15 d for the acidified and blanched celery.Type of Medium: Electronic ResourceURL: -
17Articles: DFG German National LicensesStaff View
ISSN: 1750-3841Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, NutritionProcess Engineering, Biotechnology, Nutrition TechnologyNotes: : Freshly diced tomatoes were dipped into either 0.2% or 1% calcium chloride or 2% calcium lactate solution and exposed to γ-irradiation at 1.25 kGy. With increasing levels of calcium, firmness was enhanced, water-soluble pectin was decreased, and oxalate-soluble pectin was increased. Irradiation decreased instrumental firmness in all samples; however, the 1% calcium chloride and 2% calcium lactate-dipped samples remained firmer than the water-dipped control. Irradiation alone did not have a significant impact on pectic substances. Trained sensory panelists did not detect a significant loss of firmness due to irradiation in the calcified tomatoes, but some judges detected a change in flavor following the calcium dips.Type of Medium: Electronic ResourceURL: -
18Articles: DFG German National LicensesKOORAPATI, A. ; FOLEY, D. ; PILLING, R. ; PRAKASH, A.
Oxford, UK : Blackwell Publishing Ltd
Published 2004Staff ViewISSN: 1750-3841Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, NutritionProcess Engineering, Biotechnology, Nutrition TechnologyNotes: : The effect of electron-beam irradiation on microbial counts, color, texture, and enzyme activity of mushroom slices was evaluated at dose levels of 0.5, 1, 3.1, and 5.2-kGy. Irradiation levels above 0.5 kGy reduced total plate counts, yeast and mold, and psychrotrophic counts to below detectable levels and prevented micro-bial-induced browning. Firmness of all samples was similar during storage except for the 5.2-kGy sample. Color was preserved by irradiation as evidenced by the higher L values. Electron-beam irradiation at these levels did not affect the polyphenol oxidase activity. Irradiation at 1 kGy was most effective in extending shelf-life of mushroom slices.Type of Medium: Electronic ResourceURL: -
19Articles: DFG German National LicensesSipahioglu, O. ; Barringer, S.A. ; Taub, I. ; Prakash, A.
Oxford, UK : Blackwell Publishing Ltd
Published 2003Staff ViewISSN: 1750-3841Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, NutritionProcess Engineering, Biotechnology, Nutrition TechnologyNotes: The dielectric properties of 19 different ham samples with different moisture (38.2% to 68.9%) and ash contents (1.78% to 6.80%) were measured at −35 to 70 °C at 2450MHz. Equations were developed as a function of temperature, moisture, and ash, and compared to literature equations. The dielectric constant decreased with ash content and increased with moisture content. It increased instead of decreasing with temperature. The dielectric loss factor increased with moisture content for moisture contents lower than 60.7%, then decreased for higher moisture contents. Ash content and temperature increased dielectric loss factor. Frozen samples had low dielectric activity that was increased by ash content above −20 to −10 °C.Type of Medium: Electronic ResourceURL: -
20Articles: DFG German National LicensesStaff View
ISSN: 0003-4916Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: PhysicsType of Medium: Electronic ResourceURL: