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  • 1
    Electronic Resource
    Electronic Resource
    Sulphur and phosphorus requirements of Curvularia pallescens Boed (1972)
    Springer
    Mycopathologia 47 (1972), S. 363-368 
    Details
    ISSN: 1573-0832
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The effect of different sulphur and phosphorus compounds on the growth and sporulation ofCurvularia pallescens Boed. has been studied. Nine different sulphur sources were tried but among them only magnesium sulphate yielded the best dry weight of the fungus. Zinc sulphate, sodium sulphate, sodium thiosulphate, potassium sulphate and calcium sulphate supported good growth. Poor growth was recorded on sodium bisulphite, ammonium sulphate, sodium sulphide and control. Sporulation was excellent on magnesium sulphate. It was good on zinc sulphate, sodium sulphate and potassium sulphate. On sodium thiosulphate, calcium sulphate, sodium bisulphite and control it was fair. Sodium sulphide and ammonium sulphate had inhibitory effect as sporulation was poor and nil on these two compounds respectively. Six phosphorus compounds were studied. Tripotassium phosphate gave best growth and excellent sporulation. Good growth and excellent sporulation was recorded on monobasic potassium phosphate and magnesium phosphate. Growth and sporulation were good on dibasic potassium phosphate and sodium dihydrogen phosphate. Ammonium phosphate was poorly utilized.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02052347
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  • 2
    Electronic Resource
    Electronic Resource
    Correlation of the Anticholinesterase and Molluscicidal Activity of the Latex of Euphorbia royleana on the Snail Lymnaea acuminata (1984)
    s.l. : American Chemical Society
    Journal of natural products 47 (1984), S. 702-705 
    Details
    ISSN: 1520-6025
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/np50034a023
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  • 3
    Electronic Resource
    Electronic Resource
    Moment Tensor Solutions of Earthquakes in the Indian Ocean from Surface Waves and their Tectonic Implications (1997)
    Springer
    Pure and applied geophysics 150 (1997), S. 53-73 
    Details
    ISSN: 1420-9136
    Keywords: Key words: Indian Ocean, moment tensor solution.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract —Rayleigh and Love waves generated by sixteen earthquakes which occurred in the Indian Ocean and were recorded at 13 WWSSN stations of Asia, Africa and Australia are used to determine the moment tensor solution of these earthquakes. A combination of thrust and strike-slip faulting is obtained for earthquakes occurring in the Bay of Bengal. Thrust, strike slip or normal faulting (or either of the combination) is obtained for earthquakes occurring in the Arabian Sea and the Indian Ocean. The resultant compressive and tensional stress directions are estimated from more than 300 centroid moment tensor (CMT) solution of earthquakes occurring in different parts of the Indian Ocean. The resultant compressive stress directions are changing from north-south to east-west and the resultant tensional stress directions from east-west to north-south in different parts of the Indian Ocean. The results infer the counterclockwise movement of the region (0°–33°S and 64°E–94°E), stretching from the Rodriguez triple junction to the intense deformation zone of the central Indian Ocean and the formation of a new subduction zone (island arc) beneath the intense deformation zone of the central Indian Ocean and another at the southern part of the central Indian basin. The compressive stress direction is along the ridge axis and the extensional stress manifests across the ridge axis. The north-south to northeast-south west compression and east-west to northwest-southeast extension in the Indian Ocean suggest the northward underthrusting of the Indian plate beneath the Eurasian plate and the subduction beneath the Sunda arc region in the eastern part. The focal depth of earthquakes is estimated to be shallow, varying from 4 to 20 km and increasing gradually in the age of the oceanic lithosphere with the focal depth of earthquakes in the Indian Ocean.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s000240050063
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  • 4
    Electronic Resource
    Electronic Resource
    Anelasticity of the crust and upper mantle beneath north and central India from the inversion of observed Love and Rayleigh wave attenuation data (1991)
    Springer
    Pure and applied geophysics 135 (1991), S. 545-558 
    Details
    ISSN: 1420-9136
    Keywords: Q-structure ; lithosphere ; India
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The fundamental mode Love and Rayleigh waves generated by earthquakes occurring in Kashmir, Nepal Himalaya, northeast India and Burma and recorded at Hyderabad, New Delhi and Kodaikanal seismic stations are analysed. Love and Rayleigh wave attenuation coefficients are obtained at time periods of 15–100 seconds, using the spectral amplitude of these waves for 23 different paths along northern (across Burma to New Delhi) and central (across Kashmir, Nepal Himalaya and northeast India to Hyderabad and Kodaikanal) India. Love wave attenuation coefficients are found to vary from 0.0003 to 0.0022 km−1 for northern India and 0.00003 km−1 to 0.00016 km−1 for central India. Similarly, Rayleigh wave attenuation coefficients vary from 0.0002 km−1 to 0.0016 km−1 for northern India and 0.00001 km−1 to 0.0009 km−1 for central India. Backus and Gilbert inversion theory is applied to these surface wave attenuation data to obtainQ β −1 models for the crust and uppermost mantle beneath northern and central India. Inversion of Love and Rayleigh wave attenuation data shows a highly attenuating zone centred at a depth of 20–80 km with lowQ for northern India. Similarly, inversion of Love and Rayleigh wave attenuation data shows a high attenuation zone below a depth of 100 km. The inferred lowQ value at mid-crustal depth (high attenuating zone) in the model for northern India can be by underthrusting of the Indian plate beneath the Eurasian plate which has caused a low velocity zone at this shallow depth. The gradual increase ofQ β −1 from shallow to deeper depth shows that the lithosphere-asthenosphere boundary is not sharply defined beneath central India, but rather it represents a gradual transformation, which starts beneath the uppermost mantle. The lithospheric thickness is 100 km beneath central India and below that the asthenosphere shows higher attenuation, a factor of about two greater than that in the lithosphere. The very lowQ can be explained by changes in the chemical constitution taking place in the uppermost mantle.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01772405
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  • 5
    Electronic Resource
    Electronic Resource
    Influence of gibberellic acid on the sporulation of Azolla caroliniana, Azolla microphylla and Azolla pinnata (1999)
    Springer
    Biology and fertility of soils 29 (1999), S. 424-429 
    Details
    ISSN: 1432-0789
    Keywords: Key words Azolla species ; Gibberellic acid ; Megasporocarp percentage ; Sporocarp number ; Sporulation frequency
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Azolla microphylla strains used in the study sporulate throughout the year while Azolla caroliniana and Azolla pinnata strains show sporulation only during November–March, the favourable period for sporulation. Application of gibberellic acid (GA) at a concentration of 2.5–100.0 μg ml–1 substantially enhanced the sporulation frequency and number of sporocarps (mega plus micro) per plant in Azolla microphylla (two strains) during the unfavourable period (September–October) by 77.3–200.0%. The increase in the number of microsporocarps was more than that of the megasporocarps. The sporulation frequency and number of sporocarps in Azolla pinnata (two strains) and Azolla caroliniana during the favourable season also increased considerably due to GA (2.5–10.0 μg ml–1) application. The optimum GA concentration for the sporulation of the three Azolla species was 2.5 μg ml–1, which was used in the subsequent investigations. Efficacy of GA for enhancing sporulation was tested across 20 Azolla pinnata strains. A significant positive response was observed in all the strains. Of them, 17 strains for the sporulation frequency and 15 strains for the sporocarp number showed a 〉25% increase due to GA treatment. Under field conditions, Azolla microphylla (two strains), Azolla caroliniana and Azolla pinnata exhibited 66.0–88.1% higher sporulation frequency and 42.8–52.6% higher sporocarp number due to GA application. However, the proportion of megasporocarps to total sporocarps did not change.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003740050575
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  • 6
    Electronic Resource
    Electronic Resource
    Variability in Azolla sporulation in response to phosphorus application (2000)
    Springer
    Biology and fertility of soils 32 (2000), S. 458-462 
    Details
    ISSN: 1432-0789
    Keywords: KeywordsAzolla genotypes ; Megasporocarp percentage ; Phosphorus fertilization ; Sporocarp number ; Sporulation frequency
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract  Phosphorus application decreased the sporulation frequency and number of sporocarps per plant in all the three Azolla species and 21 A. pinnata strains evaluated in this study. The number of megasporocarps tended to be more depressed than the number of microsporocarps. Nevertheless, the sporulation of A. caroliniana was less sensitive to P than that of A. pinnata and A. microphylla. Its sporulation frequency in the mineral medium did not decrease at 2.5 μg P ml–1 and remained unaffected between 5 and 20 μg P ml–1. The sporulation frequency and sporocarp number in this species in the soil culture also were not significantly affected by an increase in the dose of P from 10.7 to 21.4 or 21.4 to 32.1 mg pot–1. Large variations in the degree of inhibition of sporulation due to the application of P (21.4 mg pot–1) also occurred among the A. pinnata strains tested.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003740000276
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  • 7
    Electronic Resource
    Electronic Resource
    Ethanol production at 45°C using preparations of Kluyveromyces marxianus IMB3 immobilized in calcium alginate and kissiris (1996)
    Springer
    Bioprocess and biosystems engineering 15 (1996), S. 275-277 
    Details
    ISSN: 1432-0797
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract The thermotolerant yeast, K. marxianus IMB3, was grown in free and immobilized states in batch-fed culture at 45°C and ethanol production was examined over a 61-day period. The organism was grown in the free state, in the free state with mineral kissiris, immobilized in calcium alginate and immobilized in calcium alginate together with kissiris. Initially, reactors were fed every two days with 10% (w/v) glucose-containing media and no significant difference in ethanol production was observed. In subsequent refeeding experiments, reactors were re-fed every two days with 15% (w/v) sucrose-containing media. Although overall ethanol concentrations decreased, production in the immobilized systems was higher. In the final stages fermentations were re-fed every 3 days and although overall ethanol production decreased further, production remained highest in the systems containing calcium alginate and kissiris.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02391589
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  • 8
    Electronic Resource
    Electronic Resource
    The effect of Actinomycin-D on chiasma frequency in Vicia faba (1968)
    Springer
    Chromosoma 24 (1968), S. 309-313 
    Details
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The effect of Actinomycin-D was studied on chiasma frequency in Vicia faba (var. Weibull's Akerabona). A significant decrease in chiasma frequency over control was observed in all cases irrespective of the time of fixation and chemical concentration. However, the maximum decrease was found in the material fixed after a recovery period of 24 hours. The decrease in chiasma frequency showed a linear relationship with time of recovery. Besides reduction in the chiasma frequency, cells showing complete failure of homologous pairing were also observed. These findings are discussed in the light of actinomycin-D action.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00336198
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  • 9
    Electronic Resource
    Electronic Resource
    Effect of cypermethrin, mexacarbate, and phorate on phospholipid and lipid peroxidation in the snail Lymnaea acuminata (1993)
    Springer
    Bulletin of environmental contamination and toxicology 51 (1993), S. 68-71 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00201002
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  • 10
    Electronic Resource
    Electronic Resource
    Two types of ELF hiss observed at Varanasi, India (1999)
    Springer
    Annales geophysicae 17 (1999), S. 1260-1267 
    Details
    ISSN: 0992-7689
    Keywords: Ionosphere (equatorial ionosphere; ionosphere-magnetosphere interactions; wave-particle interactions)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The morphology of ELF hiss events observed at low-latitude ground station Varanasi (L = 1.07, geomagnetic latitude 14°55′N) are reported, which consist of two types: (1) events which propagated in ducted mode along the geomagnetic field line corresponding to observing station Varanasi and (2) events which propagated in ducted mode along higher L-values (L = 4–6), after reaching the lower edge of ionosphere excite the Earth-ionosphere wave guide and propagate towards equator to be received at Varanasi. To understand the generation mechanism of ELF hiss, incoherent Cerenkov radiated power from the low latitude and middle latitude plasmasphere are evaluated. Considering this estimated power as an input for wave amplification through wave-particle interaction, the growth rate and amplification factor is evaluated which is too small to explain the observed wave intensity. It is suggested that some non-linear mechanism is responsible for the generation of ELF hiss.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s00585-999-1260-5
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