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Wyszukujesz frazę "Krishnamoorthy, G." wg kryterium: Autor

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    Tytuł:
    Mucuna pruriens-seed extract stimulating immune system in Litopenaeus vannamei against Vibrio harveyi
    Autorzy:
    Shanmugavel, G.
    Krishnamoorthy, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1839790.pdf
    Data publikacji:
    2021
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Mucuna pruriens
    Vibriosis
    Litopenaeus vannamei
    immunostimulant
    Vibrio harveyi
    Opis:
    Objective: To evaluate the immunostimulant (ISt) role of Mucuna pruriens-seed (Mp-seed) enriched with Artemia (Ar) in Litopenaeus vannamei (L. vannamei) infected by Vibrio harveyi (V. harveyi). Method: Fifteen shrimp (30±5g) were stocked per 250 L tank in 3 replicates and fed twice daily with Ar enriched with Mp-seed methanolic extracts at 100 ppm and 200 ppm for 21 days. Infected L. vannamei shows altered immunoparameter (IPM) and antioxidant enzyme status due to the V. harveyi infection induced stress. Results: Significantly increased (p<0.05) total haemocyte count, respiratory burst, phenoloxidase and superoxide dismutase activities were observed in shrimp fed with Mp enriched Ar diets compared to infected group. Supplementation of Mp enriched Ar in diet could enhance the immunity of shrimp against V. harveyi infection by reverses the antioxidant level. The histology of hepatopancreas (HPC) also shows Mp-fed groups has restores the normal structure. Conclusion: The study demonstrated that Mp enriched Ar in diet have a potentially role in ISt and an effective antioxidant by regulating infectious stress against vibriosis.
    Źródło:
    World News of Natural Sciences; 2021, 39; 95-112
    2543-5426
    Pojawia się w:
    World News of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A novel source side power quality improved soft starting of three-phase induction motor using a symmetrical angle controller through pic microcontroller
    Autorzy:
    Selvaperumal, S.
    Krishnamoorthy, N.
    Prabhakar, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/2086849.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    soft starting of three phase induction motor
    symmetrical angle controller
    AC voltage controller
    power quality improvement
    rozruch trójfazowego silnika indukcyjnego
    symetryczny kontroler kąta
    kontroler napięcia prądu przemiennego
    poprawa jakości energii elektrycznej
    Opis:
    PIC microcontroller has a vital role in various types of controllers and nowadays the presence of PIC microcontroller is unavoidable in most control applications. This paper describes the enhancement of soft starting of induction motors using PIC microcontroller. Soft starting is required for the induction motors with reduced applied voltages so that the peak starting current is reduced and the startup of the motor is smooth with controlled torque and reduced mechanical vibrations, reduced starting current with correspondingly reduced bus voltage drops. While many of the available schemes of soft starting offer better results in view of smooth starting process, the proposed methodology offers soft starting as well as it cares about the source current quality. In contrast to the conventional multistep starting scheme, in this work a continuously controlled starting scheme is proposed. The three phase AC voltage controller topology is used as the core controller. In each of the half cycles, instead of a single conduction period with a single delay angle, the proposed AC voltage controller is switched symmetrically in each half cycle with multiple pulses in each quarter cycle. Symmetrically placed fixed numbers of switching pulses are used. The paper also describes the various time ratio controls namely the phase angle controller, the extinction angle controller and the symmetrical angle controller. The design aspects of the proposed soft starting scheme and the validation of the proposed system in the MATLAB SIMULINK environment are presented in this paper.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 2; e136746, 1--12
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A novel source side power quality improved soft starting of three-phase induction motor using a symmetrical angle controller through pic microcontroller
    Autorzy:
    Selvaperumal, S.
    Krishnamoorthy, N.
    Prabhakar, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/2128138.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    soft starting of three phase induction motor
    symmetrical angle controller
    AC voltage controller
    power quality improvement
    rozruch trójfazowego silnika indukcyjnego
    kontroler kąta symetryczny
    kontroler napięcia prądu przemiennego
    poprawa jakości energii elektrycznej
    Opis:
    PIC microcontroller has a vital role in various types of controllers and nowadays the presence of PIC microcontroller is unavoidable in most control applications. This paper describes the enhancement of soft starting of induction motors using PIC microcontroller. Soft starting is required for the induction motors with reduced applied voltages so that the peak starting current is reduced and the startup of the motor is smooth with controlled torque and reduced mechanical vibrations, reduced starting current with correspondingly reduced bus voltage drops. While many of the available schemes of soft starting offer better results in view of smooth starting process, the proposed methodology offers soft starting as well as it cares about the source current quality. In contrast to the conventional multistep starting scheme, in this work a continuously controlled starting scheme is proposed. The three phase AC voltage controller topology is used as the core controller. In each of the half cycles, instead of a single conduction period with a single delay angle, the proposed AC voltage controller is switched symmetrically in each half cycle with multiple pulses in each quarter cycle. Symmetrically placed fixed numbers of switching pulses are used. The paper also describes the various time ratio controls namely the phase angle controller, the extinction angle controller and the symmetrical angle controller. The design aspects of the proposed soft starting scheme and the validation of the proposed system in the MATLAB SIMULINK environment are presented in this paper.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 2; e136746, 1--12
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Antibacterial activity of Ulva fasciata against multidrug resistant bacterial strains
    Autorzy:
    Chandrasekaran, M.
    Venkatesalu, V.
    Raj, G.A.
    Krishnamoorthy, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/11746.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    antibacterial activity
    Ulva fasciata
    multidrug
    resistance
    bacterial strain
    methanol extract
    treatment
    Opis:
    The present study was conducted to evaluate the antibacterial activity of different organic solvent increasing polarity viz., hexane, chloroform, ethyl acetate, acetone and methanol extracts of Ulva fasciata (Chlorophyceae) were collected from Kanniyakummari, Gulf of Mannar biosphere Reserve, Tamilnadu, India. Marine green algae extracts of U. fasciata against multi-drug resistant standard and clinical bacterial strains viz., Bacillus subtilis, Streptococcus pyogenes, Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa, Salmonella typhimurium, Vibrio cholerae, Shigella flexneri, Proteus mirabilis and P. vulgaris. The ethyl acetate extracts of U. fasciata showed highest antibacterial activity against all the bacterial strains tested. The mean zone of inhibition produced by the extracts in disc diffusion assays were ranged from 7.1 mm to 15.0 mm. The Minimum Inhibitory Concentrations (MIC) were between 125 μg/ml and 500 μg/ml, while the Minimum Bactericidal Concentrations (MBC) were between 250 μg/ml and 1000 μg/ml. The highest mean of zone inhibition (15.0 mm) and lowest MIC (125 μg/ml) and MBC (250 μg/ml) values were observed in ethyl acetate extract of U. fasciata against B. subtilis. The ethyl acetate extract of the U. fasciata showed the presence of phytochemicals, terpenoids, tannins and phenolic compounds in U. fasciata than the other solvents extracts. The present results of the ethyl acetate extract of U. fasciata can be used as an antibacterial substance for the treatment of multi drug resistant bacterial infections.
    Źródło:
    International Letters of Natural Sciences; 2014, 14
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Screening of different extracts of marine macro green algae for larvicidal activity against dengue fever mosquito, Aedes aegypti (diptera: Culiadae)
    Autorzy:
    Adaikala Raj, G.
    Jayaraman, M.
    Krishnamoorthy, S.
    Chandrasekaran, M.
    Venkatesalu, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/11343.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Źródło:
    International Letters of Natural Sciences; 2017, 62
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Extraction of Dyes from Petrocarpus santalinus and Dyeing of Natural Fibres Using Different Mordants
    Ekstrakcja barwników z Petrocarpus santalinus i barwienie naturalnych włókien przy użyciu różnych zapraw farbiarskich
    Autorzy:
    Mariselvam, R.
    Athinarayanan, G.
    Ranjitsingh, A. J. A.
    Nanthini, A. U. R.
    Krishnamoorthy, R.
    Alshatwi, A. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/233547.pdf
    Data publikacji:
    2018
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
    Tematy:
    Petrocarpus santalinus
    natural fibres
    mordant
    plant dyes
    Pterocarpus santalinus
    włókna naturalne
    zaprawa
    barwniki roślinne
    Opis:
    Aqueous extraction of natural dyes from Petrocarpus santalinus tree wood and dyeing of the following natural fibres: banana fibre, screw fine fibre, pineapple fibre, sisal fibre, korai and palm leaf using various mordants to fix the colour in the fibre materials were performed. Salt, sodium bicarbonate, oxalic acid, tannic acid, ferrous ammonium sulphate, stannous chloride (tin metal powder), alum and tamarind (Tamarindus indica) were used as a mordant for the dying of the natural fibres. Petrocarpus santalinus dye was effectively dyed on natural fibres using different mordants, producing different colours like tomato, maroon, orange red, chocolate, brown, quarry red, black, brick red, tile red, terra colla, sunbaked clay, gray, brick red, victorian red, firebrick, brown, crimson and orange, using these mordants.
    W artykule omówiono wykonanie wodnej ekstrakcji naturalnych barwników z drzewa Petrocarpus santalinus oraz barwienie włókien naturalnych, m.in. bananowca, ananasa, sizalu, korai i liści palmowych przy zastosowaniu różnych zapraw farbiarskich, których użycie miało na celu utrwalenie koloru w materiałach włóknistych. Jako zapraw farbiarskich użyto soli, wodorowęglanu sodu, kwasu szczawiowego, kwasu garbnikowego, siarczanu żelazowo-amonowego, chlorku cyny (proszek cyny metalicznej), ałunu i tamaryndowca (Tamarindus indica). Włókna naturalne skutecznie zabarwiono barwnikiem Petrocarpus santalinus przy użyciu różnych zapraw uzyskując różne kolory takie jak: pomidorowy, bordowy, pomarańczowy, czerwony, czekoladowy, brązowy, czarny, czerwony ceglany, terra colla, glinka opalana, szara, ceglastoczerwona, wiktoriański czerwony, ognisty, brązowy, szkarłatny i pomarańczowy.
    Źródło:
    Fibres & Textiles in Eastern Europe; 2018, 5 (131); 20-23
    1230-3666
    2300-7354
    Pojawia się w:
    Fibres & Textiles in Eastern Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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