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Wyszukujesz frazę "Prakash, Om" wg kryterium: Autor

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    Wyświetlanie 1-6 z 6
    Tytuł:
    An organic solvent and surfactant stable α-amylase from soybean seeds
    Autorzy:
    Jaiswal, Nivedita
    Prakash, Om
    Powiązania:
    https://bibliotekanauki.pl/articles/1039536.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    agarose
    agar
    gelatin
    biocatalysis
    detergent
    immobilization
    Opis:
    An organic solvent and surfactant stable α-amylase was obtained from soybean seeds. The direct and indirect effect of various organic solvents (non-polar, polar protic, and polar aprotic) and surfactants on the activity and stability of free enzyme was determined. The enzyme showed a very high catalytic efficiency and stabilization against most of the organic solvents and surfactants tested, except for few. Those organic solvents and surfactants (like chloroform, dimethyl formamide, n-butanol, and Tween 20), which caused an inhibition in enzyme activity, were used to study their effects on immobilized enzyme. The inhibitory effect was found to be decreased in immobilized enzyme as compared to free enzyme indicating that immobilization imparted stability to the enzyme. Moreover, the possibility of reuse of the enzyme in the presence of the organic solvents and surfactants was increased upon immobilization. The stability of soybean α-amylase towards organic solvents and surfactants shows that it is a potential candidate for use in organic-solvent biocatalysis as well as in detergent industries.
    Źródło:
    Acta Biochimica Polonica; 2013, 60, 3; 387-393
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of artificial coarseness on the performance of rectangular solar air heater duct: a comparative study
    Autorzy:
    Dubey, Manoj Kumar
    Prakash, Om
    Powiązania:
    https://bibliotekanauki.pl/articles/27312238.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    solar energy
    artificial
    coarseness
    heat transfer coefficient
    thermo-hydraulic performance
    friction factor
    Opis:
    Solar air heater is regarded as the most common and popular solar thermal system and has a wide range of applications, from residential to industrial. Solar air heater is not viable because of the low convective heat transfer coefficient at the absorber plate which contributes to decreasing the thermal efficiency. Artificial coarseness on the plain surface is the most effective method to enhance heat transfer with a moderate rate of friction factor of flowing air in the design of solar air heater duct. The different parameters and different artificial coarseness are responsible to alter the flow structure and heat transfer rate. Over the years different artificial roughness and how its geometry affects the performance of solar air heater have been thoroughly studied. Various investigators report the correlations between heat transfer and friction factors. In the present study, a comparison of several artificial coarseness geometries and methods with a view to enhancing the performance of solar air heater has been made. A brief outline has also been presented for future research.
    Źródło:
    Archives of Thermodynamics; 2023, 44, 3; 325--358
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermal performance evaluation of an earth-to-air heat exchanger for the heating mode applications using an experimental test rig
    Autorzy:
    Ahmad, Saif Nawaz
    Prakash, Om
    Powiązania:
    https://bibliotekanauki.pl/articles/2091363.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    heat transfer
    earth-to-air heat exchanger
    ground heat exchanger
    geothermal energy
    renewable energy
    assive heating
    assive cooling
    effectiveness
    Opis:
    This paper presents the experimental investigation of an earth-to-air heat exchanger for heating purposes in the Patna region of India, using an experimental test rig. In the view of the author, real field experiments have several limitations such as lack of repeatability and uncontrolled conditions. It also takes more time for the response of parameters that depends on nature and climate. Moreover, earth-to-air heat exchangers may be expensive to fabricate and require more land area. Thus, in this work authors executed their experimental work in indoor controllable environments to investigate the thermal performance of an earth-to-air heat exchanger. The actual soil conditions were created and maintained the temperature at 26°C throughout the soil in the vicinity of pipes. Three horizontal PVC pipes of equal lengths and diameters of 0.0285 m, 0.038 m and 0.0485 m were installed in the test rig. The experiments were performed for different inlet air velocities at ambient air temperature. This study acknowledges that the maximum rise in outlet temperature occurs at a lower speed for smaller pipes. Also, the maximum effectiveness of 0.83 was observed at 2 m/s for the smallest diameter pipe.
    Źródło:
    Archives of Thermodynamics; 2022, 43, 1; 185--207
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An Ensemble of Statistical Metadata and CNN Classification of Class Imbalanced Skin Lesion Data
    Autorzy:
    Nayak, Sachin
    Vincent, Shweta
    Sumathi, K.
    Kumar, Om Prakash
    Pathan, Sameena
    Powiązania:
    https://bibliotekanauki.pl/articles/2055258.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    classification
    Convolutional Neural Networks
    Ensemble Learning
    machine learning
    metadata
    Opis:
    Skin Cancer is one of the most widely present forms of cancer. The correct classification of skin lesions as malignant or benign is a complex process that has to be undertaken by experienced specialists. Another major issue of the class imbalance of data causes a bias in the results of classification. This article presents a novel approach to the usage of metadata of skin lesions images to classify them. The usage of techniques addresses the problem of class imbalance to nullify the imbalances. Further, the use of a convolutional neural network (CNN) is proposed to finetune the skin lesion data classification. Ultimately, it is proven that an ensemble of statistical metadata analysis and CNN usage would result in the highest accuracy of skin color classification instead of using the two techniques separately.
    Źródło:
    International Journal of Electronics and Telecommunications; 2022, 68, 2; 251--257
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Study of Types of Sensors used in Remote Sensing
    Autorzy:
    Vincent, Shweta
    Francis, Sharmila Anand John
    Raimond, Kumudha
    Kumar, Om Prakash
    Powiązania:
    https://bibliotekanauki.pl/articles/227262.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    disaster management
    microwave sensors
    optical sensors
    Remote Sensing
    Opis:
    Of late, the science of Remote Sensing has been gaining a lot of interest and attention due to its wide variety of applications. Remotely sensed data can be used in various fields such as medicine, agriculture, engineering, weather forecasting, military tactics, disaster management etc. only to name a few. This article presents a study of the two categories of sensors namely optical and microwave which are used for remotely sensing the occurrence of disasters such as earthquakes, floods, landslides, avalanches, tropical cyclones and suspicious movements. The remotely sensed data acquired either through satellites or through ground based-synthetic aperture radar systems could be used to avert or mitigate a disaster or to perform a post-disaster analysis.
    Źródło:
    International Journal of Electronics and Telecommunications; 2019, 65, 2; 217-228
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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