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  • 1990-1994  (10)
  • 1994  (10)
  • 1
    Electronic Resource
    Electronic Resource
    Noise study of a high-Tc Josephson junction under near-millimeter-wave irradiation (1994)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 64 (1994), S. 927-929 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Noise studies of both the dc and ac Josephson effects have been performed on a high-Tc ramp-type Josephson junction irradiated at 176 GHz. Well-established analytical results for noise in overdamped RSJs are used to model the measured I-V characteristics, and their agreement is excellent. Noise-rounded I-V curves at the critical current and the first and second Shapiro steps under coherent 176 GHz radiation have been studied in detail at several temperatures and rf power levels. The noise temperatures inferred from these simulations are close to the physical temperatures. An increase of noise temperatures at high radiation power levels is a result of radiation heating, which could be due to a bolometric effect.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.110974
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  • 2
    Electronic Resource
    Electronic Resource
    Spin coating of viscoelastic and nonvolatile fluids over a planar disk (1994)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Fluids 6 (1994), S. 3539-3553 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Spin coating of two commercially used polymer solutions is studied both theoretically and experimentally. Physical and rheological characterization of these solutions indicates that under the spinning conditions currently used they behave as nonvolatile, viscoelastic fluids with constant viscosity and elasticity. The corresponding Reynolds (Re) and Deborah (De) numbers are up to order unity. The theoretical analysis demonstrates and explains why, at very short times after the inception of impulsive spinning, the velocity and stress fields in such fluids develop in an oscillatory manner. The amplitude of these oscillations increases with the ratio of the retardation parameter to the Deborah number, whereas their damping rate gets smaller as De increases. Since these oscillations dissipate very rapidly, and before substantial thinning of the film takes place, the thinning rate, velocity, and shear stress components do not deviate eventually from those of a Newtonian fluid. Such a complete explanation of similar experimental findings has not been offered before. The radial normal stress component does increase considerably over its Newtonian value, and this explains certain "experimental practices.'' Similar oscillatory development early on occurs even at higher Re, as long as Re∼De, but it is dissipated again, this time because of the abrupt thinning of the film. The theoretical results are in good agreement with experimental measurements of "dry film'' thickness and with dynamical measurements of "wet film'' thickness during spinning, which are reported herein for the first time. Care must be taken in reporting "dry film'' thickness because the commercial solutions under study retain part of the solvent after "soft baking'' over a hotplate. Complete solvent removal produces dry films, but requires treatment in a vacuum oven, higher temperatures, and longer heating times.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.868413
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  • 3
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    Trends in Modern Indian Fiction (1994)
    Norman, Okla. : Periodicals Archive Online (PAO)
    World literature today. 68:2 (1994:Spring) 299 
    Details
    ISSN: 0196-3570
    Topics: Linguistics and Literary Studies
    Notes: INDIAN LITERATURES: IN THE FIFTH DECADE OF INDEPENDENCE: "Advisory Editor": VINAY DHARWADKER
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:8211-1994-068-02-000018
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  • 4
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    Trends in Modern Indian Fiction (1994)
    Norman, Okla. : Periodicals Archive Online (PAO)
    World literature today. 68:2 (1994:Spring) 299 
    Details
    ISSN: 0196-3570
    Topics: Linguistics and Literary Studies
    Notes: INDIAN LITERATURES: IN THE FIFTH DECADE OF INDEPENDENCE: "Advisory Editor": VINAY DHARWADKER
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:8211-1994-068-02-000018
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  • 5
    Electronic Resource
    Electronic Resource
    MRI in intraspinal tuberculosis (1994)
    Springer
    Neuroradiology 36 (1994), S. 39-43 
    Details
    ISSN: 1432-1920
    Keywords: Spine ; Spinal cord ; Tuberculosis ; MRI
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We studied 20 patients with intraspinal tuberculosis (TB), to characterise the MRI features of tuberculous meningitis and myelitis. MRI leptomeningitis and intramedullary involvement in 11 patients, intramedullary lesions alone in 5, leptomeningitis alone in 2, and isolated extradural disease in 2. TB leptomeningitis was characterised by loculation of the cerebrospinal fluid (CSF), nerve root thickening and clumping (seen only in the lumbar region) or complete obliteration of the subarachnoid space on unenhanced images. Gd-DTPA-enhanced images proved useful in 6 cases, revealing linear enhancement of the surface of the spinal cord and nerve roots or plaque-like enhancement of the dura-arachnoid mater complex. Intramedullary lesions included tuberculomas (8), cord oedema (5) and cavitation (3). In seven cases of intramedullary tuberculoma multiple lesions with skip areas were seen, without significant cord swelling. One patient had an isolated lesion in the conus medullaris. The lesions were iso- or hypointense on T1-weighted images, iso-, hypo- or hyperintense on T2-weighted images and showed rim or nodular enhancement with contrast medium.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00599194
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  • 6
    Electronic Resource
    Electronic Resource
    MR imaging and angiography in tuberculous meningitis (1994)
    Springer
    Neuroradiology 36 (1994), S. 87-92 
    Details
    ISSN: 1432-1920
    Keywords: Tuberculous meningitis ; Cranial nerves ; MR angiography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract MRI was performed on 26 patients with tuberculous meningitis, with particular reference to document the cranial nerve abnormalitics. MR angiography (MRA) was performed in 20 of the patients. Meningeal enhancement in the basal cisterns or over the convexity of brain was seen in all patients; two show ependymal enhancement. Tuberculomas, single (3), multiple (12) or miliary (2) were detected in 17 patients. Of the 9 patients with cranial nerve palsies, 7 showed contrast enhancement with or without thickening of the involved nerve. Abnormality signal intensity of the involved nerve was seen on proton density and T2-weighted images in one of these patients. MRA revealed focal arterial narrowing in 10 patients, the vessels commonly affected being the terminal segment of the internal carotid artery and the proximal segments of the middle and anterior cerebral arteries. One patient also had a small aneurysm of the proximal middle cerebral artery. Infarcts, haemorrhagic (8) or bland (6), were detected in 14 patients; most were the basal ganglia and internal capsules, large middle or anterior cerebral arterial territory infarcts being seen in only two cases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00588066
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  • 7
    Electronic Resource
    Electronic Resource
    In vitro selection of endosulfan-tolerant strains of Brassica compestris (cv. Brown Sarson) (1994)
    Springer
    Plant cell reports 14 (1994), S. 137-140 
    Details
    ISSN: 1432-203X
    Keywords: Brassica campestris ; Brown Sarson ; Endosulfantolerant
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Endosulfan tolerant lines of mustard (Brassica campestris cv. Brown Sarson) have been developed through tissue culture methods. Cotyledonary expiants excised from eight day old in vitro grown seedlings were used for inducing callus. Fast growing friable callus was then transferred to MS medium containing (0.1–2.0 ugl−1) endosulfan for selection. Five alternating exposures with and without endosulfan containing medium yielded an endosulfan tolerant cell line (ETL). The plants regenerated from ETL were found to tolerate three fold higher concentrations of endosulfan. Callus induced from randomly selected endosulfan tolerant regenerated plants were also tolerant to 3.0 ugl endosulfan, thereby, suggesting that tolerance has been acquired at the gene level. Biochemical investigation revealed higher levels of total free sugar, free amino acids, protein and activity of peroxidase in the tolerant cell line.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00233777
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  • 8
    Electronic Resource
    Electronic Resource
    Ionic transport in the (Agl∶AgCl) mixed-system (1994)
    Springer
    Journal of materials science 29 (1994), S. 3673-3677 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Ionic mobility, conductivity, number of charge carriers and transference number are reported for annealed and rapidly quenched [xAgl∶(1−x)AgCl] mixed systems, these results are compared with Agl. Of these three materials the quenched mixed-system had the highest Ag+ ion conductivity. Further, preliminary studies are reported where the high conductivity system (i.e. quenched 0.75 Agl∶0.25 AgCl) has been used as host material for the preparation of Ag+ ion conducting glasses and composites. Detailed thermal/phase diagram studies have also been carried out on the quenched composition. The conductivity enhancement in the quenched system is attributed to the formation of new disordered phases and the introduction of amorphisity, the simple space-charge model applicable to the annealed system failed to explain these results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00357334
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  • 9
    Electronic Resource
    Electronic Resource
    Seasonal distribution ofTheileria inHyalomma anatolicum anatolicum ticks of an endemic area of haryana, india (1994)
    Springer
    Tropical animal health and production 26 (1994), S. 241-246 
    Details
    ISSN: 1573-7438
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé L'influence de la saison sur la capacité des tiquesHyalomma anatolicum anatolicum à transmettréTheileria a été étudié par détection de sporoblastes deTheileria dans les glandes salivaires de 647 tiques adultes écloses en hiver (novembre 1990 à mars 1991) et 677 écloses en saison des pluies d'été (juin à août 1991). L'intensité (nombre d'acini infectés par tique infectée) et l'abondance (nombre d'acini infectés par tique examinée) de sporoblastes deTheileria était significativement plus élevées (P 〈 0,05) chez les tiques prelevées l'hiver (10,75 et 2,23 respectivement) que chez celles récoltées l'été en saison des pluies (7,31 et 1,77 respectivement). La prévalence des tiques infectées parmi les tiques écloses en saison des pluies d'été (24,22 p.100) n'était pas significativement plus élevé que celle observée parmi les tiques écloses en hiver (20,71 p.100). Un pourcentage élevé de tiques écloses en hiver montrait un nombre plus élevé d'acini infectés (≥11/tique infectée) que celui des tiques écloses l'été, alors que l'inverse se produisait avec des nombres peu élevés d'acini infectés (5/tique infectée), soit 47,76 p.100 en hiver contre 73,78 p.100 en été. Il en est déduit que l'hiver d'Haryana est plus favorable aux stades de développement des theileries chez les tiques que la saison pluvieuse d'été.
    Abstract: Resumen Se estudió el efecto de la estación del año en la capacidad del la garrapataHyalomma anatolicum anatolicum para transmitirTheileria, detectado esporoblastos deTheileria en las glándulas salivares de 647 garrapatas adultas que mudaron en invierno (noviembre 1990 a marzo 1991) y de 677 garrapatas adultas que mudaron en la estación lluviosa de verano (junio a agosto de 1991). La intensidad (número de acinos infectados por garrapata infectada) y abundancia (número de acinos infectado por garrapata examinada) de esporoblastos deTheileria fue significtavamente (P 〈 0.05) más alta en las garrapatas que mudaron en invierno (10.75 y 2.23, repectivamente) que en aquellas que mudaron en verano (7.31 y 1.77, respectivamente). La prevaliencia de garrapatas infectadas que mudaron en el verano lluvioso (24.22%), no fue significativamente más alta que en aquellas garrapatas que mudaron en invierno (20·71%). Un porcentaje más alto de garrapatas que mudaron en invierno tuvo el más alto número de acinos infectados (≥11/garrapatas infectadas) que las garrapatas que mudaron en verano. Lo contrario se encontró para un pequeño número de acinos infectados (5/garrapata infectada), siendo 47.76% para el invierno y 73.78% para el verano lluvioso. Se concluye que el invierno de Haryana es más favorable para el desarrollo de los estadiós deTheileria en las garrapatas que el verano lluvioso.
    Notes: Summary The effect of season on the capacity ofHyalomma anatolicum anatolicum ticks to transmitTheileria was studied by detectingTheileria sporoblasts in the salivary glands of 647 adult ticks moulted in winter (November 1990 to March 1991) and 677 adult ticks moulted in the summer-rainy season (June to August 1991). The intensity (number of infected acini per infected tick) and abundance (number of infected acini per tick examined) ofTheileria sporoblasts were significantly (P 〈 0·05) higher in winter moulted ticks (10·75 and 2·23 respectively) than the summer-rainy season moulted ticks (7·31 and 1·77 respectively). The prevalence of infected moulted ticks was not significantly higher in the summer-rainy season (24·22%) than in the winter (20·71%). A higher percentage of winter moulted ticks had high numbers of infected acini (≥11/infected tick) than the summer-rainy season moulted ticks, while the trend was reversed for low numbers of infected acini (5/infected tick), being 47·76% for winter and 73·78% for the summer-rainy season. It was concluded that the winter of Haryana is more favourable to the developing theilerial stages in the ticks than the summer-rainy season.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02240394
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  • 10
    Electronic Resource
    Electronic Resource
    Production and characterization of a xylanase from Cyathus stercoreus (1994)
    Springer
    World journal of microbiology and biotechnology 10 (1994), S. 293-295 
    Details
    ISSN: 1573-0972
    Keywords: Casein hydrolysate ; Cyathus stercoreus ; xylan ; xylanase production ; wheat straw
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract Cyathus stercoreus grown on wheat straw had a higher xylanase activity than when it was grown on rice husk or extracted hemicellulose. Inclusion of casein hydrolysate, Tween 80 and Mn2+ (at 0.02%, 0.2% and 0.075%, respectively) increased the production of extracellular xylanase. Optimal yield of xylanase (0.73 U/ml) was at pH 5.6 after 9 to 12 days at 30°C. The xylanase was stable at pH 4.5 to 7.5 for 2h but above 50°C its stability fell sharply.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00414866
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