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    Wyświetlanie 1-7 z 7
    Tytuł:
    Role of abiotic factors on seasonal abundance and Infestation of fruit fly, Bactrocera cucurbitae (COQ.) on bitter gourd
    Autorzy:
    Raghuvanshi, A.K.
    Satpathy, S.
    Mishra, D.S
    Powiązania:
    https://bibliotekanauki.pl/articles/66279.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    Throughout the year, there was an abundance of fruit flies in Cue-lure baited traps. Two peaks; in summer and kharif (Autumn) coincided with the 14 SW and 43 SW respectively. In kharif, maximum bitter gourd fruit damage (62.70%) occurred in the 45 SW. A second peak, with 49.70% fruit damage was observed during the 15 SW period. The temperature (maximum and minimum) showed a significant positive correlation with adult abundance, fruit damage and pupal population. The temperature recorded during the preceding first, second and third weeks had a slightly greater impact than the temperature of the current week in which the fruit fly abundance had been checked. Other abiotic factors had a non-significant effect on fruit fly adult activity, fruit damage and pupal population.
    Źródło:
    Journal of Plant Protection Research; 2012, 52, 2
    1427-4345
    Pojawia się w:
    Journal of Plant Protection Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Melanin production by Pseudomonas sp. and in silico comparative analysis of tyrosinase gene sequences
    Autorzy:
    Deepthi, S.S.
    Reddy, M.K.
    Mishra, N.
    Agsar, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/2096822.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Pseudomonas sps.
    Homo sapiens
    natural pigment
    melanogenic genes
    common central domain
    Opis:
    Background . Melanin finds enormous applications in different industries for its unique photoprotective and anti-oxidant properties. Due to its emerging demand, scientific researchers are putting efforts to unravel more microorganisms with a potential of producing melanin on large scale. Hence, the present study was aimed at the isolation of extracellular melanin producing microorganisms from lime quarries of Karnataka, India. Besides this, the tyrosinase gene governing melanin synthesis in different organisms were compared in silico to understand its evolutionary aspects. Material and methods . Melanin producing microorganisms were screened on tyrosine gelatin beef extract agar medium. Potential isolate was explored for submerged production of melanin in broth containing L-tyrosine. Melanin was characterized by UV-Vis spectroscopy, thin layer and high performance liquid chromatographic techniques. Antibacterial activity of melanin was performed by agar well assay. Comparative tyrosinase gene sequence analysis was performed by using Geneious 2021.1 trial version software. Results . Pseudomonas otitidis DDB2 was found to be potential for melanin production. No antibacterial activity was exerted by the melanin against tested pathogens. The in silico studies showed that the common central domain of tyrosinase protein sequence of selected Pseudomonas sps. exhibited 100% identity with the common central domain of Homo sapiens tyrosinase (NP_000363.1). Conclusions . Our study shows the production of melanin in good quantities by the isolate Pseudomonas otitidis DDB2 which can be explored for scale-up process. Since the melanin formed is of eumelanin type and the tyrosinase gene sequence of several Pseudomonas sp. showed relatedness to humans, this molecule may be further developed for sunscreen formulations.
    Źródło:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2021, 102, 4; 411-424
    0860-7796
    Pojawia się w:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Antidiabetic and antiplatelet aggregation study of various methanol fractions of Nymphaea stellata Willd. leaves
    Studium działania przeciwcukrzycowego i antyagregacyjnego różnych frakcji wyciągu metanolowego z liści Nymphaea stellata Willd
    Autorzy:
    Raja, M.M.
    Mishra, S.H.
    Tamboli, R.S.
    Agilandeswari, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/950585.pdf
    Data publikacji:
    2017
    Wydawca:
    Instytut Włókien Naturalnych i Roślin Zielarskich
    Tematy:
    stz-nad
    ptp1b inhibition
    adp induced
    co-tlc
    histopathology
    Opis:
    Introduction: Nymphaea stellata Willd. (Nymphaeaceae) is traditionally used for the treatment of diabetes. Alcohol extract of N. stellata leaves has been reported for hypoglycaemic activity. Objective: The aim of this study was to further investigate the different methanol fractions of N. stellata leaves for anti-diabetic activity and anti-platelet aggregation activity. Methods: Methanol extract was fractioned in to unsaponified petroleum ether fraction of methanol extract (UPFME), chloroform fraction of methanol extract (CFME) and residual fraction of methanol extract (RFME). All fractions were evaluated for in vivo anti-diabetic activity (STZ-NAD-induced rat model), in vitro anti-diabetic activity (PTP1B inhibition study) and anti-platelet aggregation activity. Results: UPFME showed significant changes in all studied parameters, compared to the diabetic control. UPFME also showed an IC50 value of 19.30±1.1 mg/ml and 13.11±0.7 μg/ml in PTP1B inhibition study and anti-platelet aggregation study, respectively. Conclusion: The study indicates that UPFME of N. stellata leaves exhibit anti-diabetic and anti-platelet aggregation activity.
    Wstęp: Nymphaea stellata Willd. (Nymphaceae) jest tradycyjnie stosowana w leczeniu cukrzycy. Istnieją doniesienia o działaniu hipoglikemicznym wyciągu alkoholowego z liści tej rośliny. Cel: Celem pracy były dalsze badania właściwości przeciwcukrzycowych i antyagregacyjnych różnych frakcji metanolowego wyciągu z liści N. stellata. Metodyka: Ekstrakt metanolowy frakcjonowano na niezmydloną frakcję otrzymaną za pomocą eteru naftowego (UMFME), frakcję otrzymaną za pomocą chloroformu (CFME) oraz pozostałość ekstraktu metanolowego (RFME). Wszystkie frakcję były badane w kierunku działania przeciwcukrzycowego in vivo (w modelu szczurzym cukrzycy wywołanej przy pomocy STZ-NAD), w kierunku aktywności przeciwcukrzycowej w badaniach in vitro (badania hamowania PTP1B) oraz w celu określenia aktywności antyagregacyjnej. Wyniki: Stosowanie frakcji UMFME powodowało znaczące zmiany we wszystkich badanych parametrach zwierząt doświadczalnych (w porównaniu do grupy kontrolnej z wywołaną cukrzycą). Wartość IC50 dla frakcji UMFME wynosiła 19,30±1,1 μg/ml w badaniu hamowania PTP1B oraz 13,11±0,7 μg/ml w badaniu działania antyagregacyjnego. Wnioski: Otrzymane wyniki badań wskazują, że frakcja UMFME z liści N. stellata wykazuje aktywność przeciwcukrzycową i antyagregacyjną.
    Źródło:
    Herba Polonica; 2017, 63, 3
    0018-0599
    Pojawia się w:
    Herba Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis and antimicrobial activity of coumarinyl Schiff base derivatives
    Autorzy:
    Mishra, A.
    Rathod, J.
    Namera, D.
    Thakrar, S.
    Shah, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/411623.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    gram positive bacterial
    gram negative bacterial
    derivatives of coumarin
    Opis:
    We have reported some novel N’-[(1)-ethylidene]-2-(6-methyl-2-oxo-2H-chromen-4-yl) acetohydrazide synthesized by conventional method. The reaction of 2-(6-methyl-2-oxo-2H-chromen-4-yl)acetohydrazide with substituted benzaldehyde in methanol as a solvent yielded a series of (7a-l). The structures of all synthesized compounds are well characterized by Mass, FT-IR, 1H NMR, 13C NMR and elemental analysis. Moreover, all synthesized compounds were screened for in vitro antimicrobial activity against the gram positive (Staphylococcus aureus, Bacilluas subtilis) and gram negative (Escherichia coli, P. aeruginosa, K. pneunonae, Enterobacter) bacterial strain. In which some the compounds show potential inhibition against the test organisms.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 11, 3; 193-201
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Studies on FOX-7 Based Melt Cast High Explosive Formulations
    Autorzy:
    Mishra, V. S.
    Vadali, S. R.
    Garg, R. K.
    Joshi, V. S.
    Wasnik, R. D.
    Asthana, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/358915.pdf
    Data publikacji:
    2013
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    melt cast
    FOX-7
    LOVEX
    shock sensitivity
    VOD
    impulse
    IMs
    Opis:
    The key driving force in modern explosive research is the development of low vulnerable high explosive (LOVEX) compositions for future applications in insensitive munitions (IMs). The increasing demand for LOVEX has led to exhaustive studies on low vulnerable explosives as a replacement for conventional cyclo-1,3,5-trimethylene-2,4,6-trinitramine (RDX) in 2,4,6-trinitrotoluene (TNT) melt cast high explosive formulations. In the present study, 1,1-diamino-2,2dinitroethene (FOX-7) has been evaluated as a possible RDX replacement in TNT based, non-aluminized as well as aluminized, melt cast formulation. FOX-7 based melt cast formulations were characterized for their sensitivity to mechanical/shock stimuli, velocity of detonation (VOD), blast parameters and thermal decomposition behavior. These characteristics are compared with the corresponding RDX based compositions as reference standard. The studies show that with little sacrifice on performance parameters, FOX-7 based, non-aluminized and aluminized, melt cast formulations are found to be less vulnerable, compared with the corresponding RDX based formulations.
    Źródło:
    Central European Journal of Energetic Materials; 2013, 10, 4; 569-580
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Tungsten on Aluminized Melt Cast High Explosive Formulations
    Autorzy:
    Mishra, V. S.
    Bhagat. A., L.
    Vadali, S. R.
    Singh, V. K.
    Wasnik, R. D.
    Asthana, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/358355.pdf
    Data publikacji:
    2012
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    tungsten
    MOUT
    low intensity conflict
    peak over pressure
    impulse
    Opis:
    Aluminized 2,4,6-trinitrotoluene (TNT) based, melt-cast, high explosive compositions are widely used in warheads. These compositions offer a blast effect over a larger period due to the secondary combustion of aluminum. During recent times tungsten based explosives have been reported for lethality at close range to avoid collateral damage in low intensity conflicts (LIC) and find application in shaped charges to enhance their penetration capability. This paper reports findings on tungsten-based, melt-cast, explosive formulations. The compositions were prepared by substituting aluminum with tungsten in the reference aluminized, high explosive formulation. The compositions were characterized for their sensitivity to mechanical/shock stimuli, velocity of detonation (VOD) and blast performance. The study reveals that the impact sensitivity remains comparable on incorporating 10% tungsten at the cost of aluminum whereas an increase in tungsten content to 20% leads to an increase in impact sensitivity. However friction sensitivity and shock sensitivity remained more or less unchanged. The velocity of detonation (VOD) of tungsten-loaded, aluminized formulations is found to be comparable to the standard aluminized formulation. The peak over pressure of tungsten-based formulations is lower than the reference, aluminized composition at close range but is almost unchanged at long range. The impulse of tungsten-based formulations is also lower than the reference, aluminized composition. The reduction in impulse at close range is substantial on replacing 10% aluminum with inert tungsten.
    Źródło:
    Central European Journal of Energetic Materials; 2012, 9, 2; 147-154
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Leaching of Al-Based Polygrain Quasicrystalline and Related Crystalline Surfaces
    Autorzy:
    Yadav, T.
    Mishra, S.
    Pandey, S.
    Singh, D.
    Lowe, M.
    Tamura, R.
    Mukhopadhyay, N.
    Srivastava, O.
    McGrath, R.
    Sharma, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/1373698.pdf
    Data publikacji:
    2014-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.44.Br
    81.16.Hc
    61.66.Dk
    68.37.Hk
    Opis:
    In the present investigation, we have studied leaching on polygrain Al-based quasicrystalline $(i-Al_{63}Cu_{25}Fe_{12})$ as well as crystalline (B2 phase; $Al_{55}Cu_{30}Fe_{15})$ alloy surfaces using a 10 mole NaOH solution. The surface was leached at varying times from 30 min to 8 h and subsequently characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and energy dispersive X-ray analysis. Leaching of the samples for 30 min generated a homogeneous layer. However further leaching for 1-8 h yielded nano-size particles on the surface. Spherical microstructure has been observed on the Al-Cu-Fe crystalline surface whereas on the quasicrystalline surface a petal-like microstructure appeared. The implications of the evolution of different microstructures in the context of structure, stability and activity are discussed. The results are compared with the microstructure of leached polygrained samples containing a mixture of different surface orientations.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 2; 629-632
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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