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  • 1
    Electronic Resource
    Electronic Resource
    Berkeley, Calif. : Berkeley Electronic Press (now: De Gruyter)
    International journal of emerging electric power systems 6.2006, 1, art5 
    ISSN: 1553-779X
    Source: Berkeley Electronic Press Academic Journals
    Topics: Electrical Engineering, Measurement and Control Technology
    Notes: A new approach for power system event recognition and classification using HS-transform and RBFNN is presented in this paper. Different power system events (disturbances) like sag, swell, notch, spike, transient, and chirp are generated and processed through Hyperbolic S-transform (HS-Transform). The excellent time-frequency resolution property of HS-Transform is used to extract useful information (features) from the non-stationary signals for pattern recognition. Here HS-transform generates the S-matrix and S-matrix provides the time-frequency contours, phase contours and absolute phase of the corresponding signal. From the above extracted information, various numerical indices like standard deviation, variance, norm, energy are found out. Further these indices are used as inputs to the Radial Basis Function Neural Network (RBFNN) for classifying different power system events accordingly. The RBFNN provides accurate results even with inputs (indices) found out under high noise conditions (SNR 20 dB). Thus the proposed method provides a robust and accurate method for power system events classification.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-203X
    Keywords: Key words Embryogenesis ; In vitro ; Zygotic embryo
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Somatic embryogenesis was achieved in callus cultures dervied from 40-day-old semimature zygotic embryos of Dalbergia sissoo on semi-solid Murashige and Skoog (MS) salts and vitamins supplemented with 0.46–1.16 µM kinetin, 6.78–9.04 µM 2,4-dichlorophenoxy acetic acid (2,4-D) and 30 g/l sucrose. Somatic embryos proliferated rapidly by secondary somatic embryogenesis after transfer to half-strength basal MS medium supplemented with 0.46–1.16 µM kinetin and 6.78– 9.04 µM 2,4-D with 2% (w/v) sucrose. The light-green somatic embryos germinated on half-strength MS salts and vitamins supplemented with 0.5 mg/l abscisic acid and 2% (w/v) sucrose. The developmental stages of somatic embryogenesis were studied by light and scanning electron microscopy.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-203X
    Keywords: Embryogenesis In vitro ; Zygotic embryo
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Somatic embryogenesis was achieved in callus cultures dervied from 40-day-old semimature zygotic embryos ofDalbergia sissoo on semi-solid Murashige and Skoog (MS) salts and vitamins supplemented with 0.46–1.16 μM kinetin, 6.78–9.04 μM 2,4-dichlorophenoxy acetic acid (2,4-D) and 30 g/1 sucrose. Somatic embryos proliferated rapidly by secondary somatic embryogenesis after transfer to half-strength basal MS medium supplemented with 0.46-1.16 μM kinetin and 6.78–9.04 μM 2,4-D with 2% (w/v) sucrose. The light-green somatic embryos germinated on half-strength MS salts and vitamins supplemented with 0.5 mg/1 abscisic acid and 2% (w/v) sucrose. The developmental stages of somatic embryogenesis were studied by light and scanning electron microscopy.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Biologia plantarum 40 (1997), S. 295-298 
    ISSN: 1573-8264
    Keywords: cultivar differences ; growth parameters ; Oryza sativa
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract For screening tolerance of six cultivars of rice (Oryza sativa) to different concentrations of nickel (0, 6, 12, 18, 24 and 30 μg dm3), growth parameters (root and shoot length, root and shoot dry matter production) and root and shoot tolerance indexes were tested after 7, 10 and 13 d of treatment. In presence of nickel in nutrient solution, root growth of cv. Nilgiri was enhanced, while in cvs. Subhadra, Khandagiri, Rudra, Sankar and Annapurna it decreased. The root tolerance index (RTI) and shoot tolerance index (STI) in cv. Nilgiri were high; cvs. Sankar and Khandagiri, however, showed a low RTI. Based on the standard growth parameters, six cultivars of rice were ranked in respect of their tolerance to nickel: Nilgiri 〉 Annapurna 〉 Subhadra 〉 Khandagiri 〉 Rudra 〉 Sankar.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Biologia plantarum 42 (1999), S. 169-176 
    ISSN: 1573-8264
    Keywords: esterase ; growth regulators ; PAGE ; peroxidase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract High frequency shoot regeneration from cotyledons excised from 4-d-old seedlings of Brassica campestris L. cv. M 27 and Brassica juncea (L.) Czern. cv. Pusabold was achieved on Murashige and Skoog's (MS) medium supplemented with 1.0 mg dm-3 N6-benzyladenine (BA) and 3 % (m/v) saccharose. Rooting occurred simultaneously with shoot formation on the medium containing 1.0 mg dm-3 BA and 0.5 mg dm-3 1-naphthaleneacetic acid. Cultures of cotyledon, cotyledon derived non-differentiating calli and differentiated calli with shoots and/or roots were analysed at different intervals for isozyme patterns of esterase and peroxidase. With the BA-induced development of shoot and/or root from non-differentiating callus, some conspicuous isozymes appeared which indicates the involvement of these isozymes in root and shoot development rather than in induction of morphogenesis in callus.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Biologia plantarum 40 (1997), S. 17-23 
    ISSN: 1573-8264
    Keywords: growth regulators ; tissue culture
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract An efficient protocol was developed for in vitro plant regeneration via somatic embryogenesis from cell suspension cultures of metal tolerant grass Echinochloa colona (L.) Link. Callus was obtained by culturing leaf base on MS medium supplemented with 0.5 mg dm-3 of 6-benzylaminopurine (BAP) and 2.0 mg dm-3 of 1-naphthaleneacetic acid (NAA). Cell suspensions were initiated and established in MS liquid medium containing 0.5 mg dm-3 BAP, 1.0 mg dm-3 NAA and 2.0 mg dm-3 2,4-dichlorophenoxyacetic acid (2,4-D). A reduction in the concentration of 2,4-D to 0.5 mg dm-3 induced formation of somatic embryos. The embryos developed and grew into normal plants in the presence of half strength MS medium without growth regulators. The regenerated plants were hardened in the greenhouse and subsequently grown in the open. This system may be also used for isolation and culture of protoplasts as a first step in somatic hybridization.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1573-8264
    Keywords: medicinal plant ; root initiation ; tissue culture
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Induction of rooting in the microshoots of Plumbago zeylanica was achieved on halfstrength basal Murashige and Skoog's medium supplemented with 0.25 mg dm−3 indole-3-butyric acid. Rooting was totally inhibited when the microshoots were cultured in vitro under continuous light, however, maximum percentage of microshoots rooted when incubated in continuous light for 4 weeks before transfer to the rooting media. Peroxidase activity increased markedly during root induction indicating a key role of peroxidase in rooting of microshoots of Plumbago zeylanica in vitro.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1573-5087
    Keywords: biomass ; indole-3-butyric acid ; male vigour ; rooting of cuttings
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Rooting in terminal shoot and lateral shoot cuttings from 10-year-old elite trees of Casuarina equisetifolia L. in different sex groups was achieved after 20 days when the basal ends of the cuttings were dipped for 3 h in 20 ppm indole-3-butyric acid (IBA). Shoots derived from male plants rooted better than their female and monoecious counterparts, and the lateral shoots were more responsive to rooting than the terminal shoots. During rooting, the metabolic activities varied in both lateral shoot and terminal shoot cuttings derived from plants under different sex groups. Peroxidase and polyphenoloxidase activities were high during root initiation and showed a sharp decline thereafter. The polyphenoloxidase activity was higher in the lateral shoot than the terminal shoot cuttings. The rooted plantlets survived and established well in the field.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Plant growth regulation 30 (2000), S. 215-219 
    ISSN: 1573-5087
    Keywords: growth regulator ; in vitro ; medicinal plant ; peroxidase activity ; rooting
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Induction of rooting in microshoots of Psoraleacorylifolia was achieved within 6–8 days of cultureon half-strength basal Murashige and Skoog's(1962) medium supplemented with 0.005–0.01 mg/lindole-3-acetic acid (IAA) and 2% (w/v) sucrose. Rooting was drastically reduced and friable callusformed at the cut end of the microshoots when themedium was supplemented with a higher concentration ofauxin. Rooting was totally inhibited when themicroshoots were cultured in vitro undercontinuous light. However, the maximum percentage ofmicroshoots rooted when incubated in continuous lightfor 4 weeks before transfer to the rooting media.Peroxidase activity increased considerably duringroot induction indicating a key role of peroxidase inrooting of microshoots of Psoralea corylifolia invitro.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Plant growth regulation 22 (1997), S. 13-17 
    ISSN: 1573-5087
    Keywords: BA ; in vitro ; medicinal plant ; NAA ; regeneration
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Plantlet regeneration via organogenesis was achieved in callus cultures derived form mature leaves, stems and leaves, petioles and roots of young seedling of Psoralea corylifolia on Murashige and Skoog medium supplemented with 2.5–3.0 mg L-1 BA, 1.0 mg L-1 NAA and 3% (w/v) sucrose. The rate of shoot bud regeneration was positively correlated with the concentration of hormones in the nutrient media. Shoot buds regenerated more readily from juvenile explants (seedling source) as compared to the mature explants. Addition of adenine sulphate (5 mg L-1) to the culture medium increased the growth of shoot buds. Optimum responses were obtained in hypocotyl and leaf explants using NAA in combination with BA, the highest rate of shoot bud regeneration being in hypocotyl explants. Rooting was readily achieved on the differentiated shoots on MS basal media without growth regulators. Regenerated plantlets were successfully established in the greenhouse.
    Type of Medium: Electronic Resource
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