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    Wyświetlanie 1-8 z 8
    Tytuł:
    Ectomycorrhizae of Tomentella badia: description and molecular identification
    Autorzy:
    Binder, A.
    Persoh, D.
    Yorou, N.S.
    Verma, R.
    Bassler, C.
    Agerer, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/67044.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Opis:
    Species within the genera Tomentella are among the most important ECM in forests. However, our knowledge about their functional characteristics is still rather limited. The ectomycorrhizae of Tomentella badia on Picea abies are described here in detail and compared to the non-identified ECM Piceirhiza obscura. A pseudoparenchymatous mantle formed by epidermoid cells is covered by heaps of epidermoid cells. This mantle type is regarded as a new one and designated as mantle type R. Many cells filled with dark blue contents and/or blue granules, together with clampless hyphae, are distinct characters of these ectomycorrhizae. Molecular-phylogenetic analysis of the ITS region was used for identification.
    Źródło:
    Acta Mycologica; 2013, 48, 2
    0001-625X
    2353-074X
    Pojawia się w:
    Acta Mycologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Phase Transitions and Stability of Group IV BCC Metals
    Autorzy:
    Verma, M. L.
    Verma, A.
    Rathore, R. P. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1968848.pdf
    Data publikacji:
    1998-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    62.20.Dc
    Opis:
    Born stability criteria were employed in the framework of extended generalised exponential potential to calculate the theoretical strength and range of stability of a perfect uniaxially stressed crystal lattice of group IV bcc metals: titanium, zirconium, and hafnium. The analysis depicts two ranges of stability, a bcc phase and a body centered tetragonal phase. The computed value of theoretical strength and strain of bcc Ti, Zr and Hf agree satisfactorily with the experimental limits. The second-order elastic constants C$\text{}_{11}$ and C$\text{}_{12}$ were also computed.
    Źródło:
    Acta Physica Polonica A; 1998, 93, 3; 479-489
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Elastic Behaviour and Lattice Vibrations in bcc V and Nb
    Autorzy:
    Verma, A.
    Verma, M. L.
    Rathore, R. P. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1946133.pdf
    Data publikacji:
    1996-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    63.20.Dj
    62.20.Dc
    Opis:
    A model is developed by extending the generalised form of exponential potential known as extended generalised exponential potential to account for: (a) a realistic realization of interactions in all separations in general and that of small separations in particular, (b) three-body and electronic effects into the interaction in an alternative and simpler form, (c) a model free from usual fitting procedure. The model is employed to compute the cohesive energy, phonon spectra and second- and third-order elastic constants for group VA bcc metals V and Nb. The computed results showing good agreement with the experimental findings lend reliability and credibility to the potential.
    Źródło:
    Acta Physica Polonica A; 1996, 90, 3; 547-556
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Nucleation on the Stability of BCC Metals
    Autorzy:
    Verma, A.
    Verma, M. L.
    Rathore, R. P. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1963285.pdf
    Data publikacji:
    1997-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    62.20.Dc
    Opis:
    Numerical calculations are made of theoretical strength and range of stability of a perfect uniaxially stressed crystal lattice of bcc vanadium, niobium and tantalum in the framework of extended generalised exponential potential by applying Born stability criteria. Two ranges of stability, a bcc phase and a body centered tetragonal phase are found to exist. The computed values of theoretical strength and strain of bcc V, Nb and Ta agree reasonably well with the experimental limits.
    Źródło:
    Acta Physica Polonica A; 1997, 91, 3; 583-596
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Photochemical Studies of Solanum Melangena (Eggplant) Fruit by Flame Atomic Absorption Spectrometry
    Autorzy:
    Persid, R.
    Verma, V. N.
    Powiązania:
    https://bibliotekanauki.pl/articles/411552.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    solanum melangena
    Eggplant
    elemental analysis
    AAS
    Opis:
    Solanum melangena (eggplant) belongs to Solanaceae family. The common name of this frui and the plant is the same. It has different names in different countries such as eggplant, brinjal, baigan, balangie etc. Eggplant has been reported as a healthiest fruit due to the chemical constituents. The shape, size and colour of the fruits are also different. The genetically engineered eggfruits are also available. Some research works on eggplant are reported in different countries for different purposes. The present study has been taken into an account for the chemical elements present in flesh, skin and the seeds of eggplant grown in the soil and environmental conditions of Guyana. The investigation by the flame atomic absorption photometry shows the presence of Ca, Cd, Co, Cu, Fe, Mg, Mn, Pb and Zn at a varying concentrations in flesh, skin and seeds. In general the presence of calcium and magnesium as the higher values out of which concentration of calcium is 1366mg/kg in skin and magnesium as 2466 mg/Kg in seed.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 20, 2; 211-218
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Photocatalytic degradation of ampicillin using silver nanoparticles biosynthesised by Pleurotus ostreatus
    Autorzy:
    Jassal, P.S.
    Khajuria, R.
    Sharma, R.
    Debnath, P.
    Verma, S.
    Johnson, A.
    Kumar, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/2096973.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ampicillin
    FTIR
    photocatalysis
    silver nanoparticles (Ag-NPs)
    TEM
    Opis:
    The past few decades have witnessed a tremendous increase in the consumption of antibiotics worldwide. This rampant and unregulated use of antibiotics and their improper disposal has led to the accumulation of these drugs in the environment. This in turn has led to the emergence of antibiotic resistance in microbes and has become one of the most pressing global concerns in medicine, with highly resistant pathogens of many species proving difficult to treat. The aim of the study was to synthesise silver nanoparticles (Ag-NPs) using white rot fungus, Pleurotus ostreatus and assess its potential to carry out photocatalytic degradation of ampicillin. UV–Vis spectroscopy, Fourier transform infrared spectroscopy and transmission electron microscope have been used to characterize biosynthesized Ag-NPs. The photocatalytic degradation of ampicillin in aqueous solution by Ag-NPs was evaluated under natural sunlight. The effect of the operating conditions (contact time, Ag-NP concentration and initial ampicillin concentration) on the photocatalytic degradation was also investigated. The highest ampicillin degradation of 96.5% was observed after exposure of the solution (antibiotic + nanoparticles) for 4 h in sunlight. The maximum degradation was observed at an Ag-NP concentration of 5 ppm at pH 6. To the best of our knowledge, photocatalytic degradation of ampicillin using Ag-NPs synthesised by P. ostreatus has not been reported earlier.
    Źródło:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2020, 101, 1; 5-14
    0860-7796
    Pojawia się w:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermal analysis of epoxy based coconut fiber-almond shell particle reinforced biocomposites
    Analiza cieplna biokompozytów epoksydowych umacnianych łuskami migdałowca i włóknami kokosowymi
    Autorzy:
    Chaudhary, A. K.
    Gope, P. C.
    Singh, V. K.
    Suman, A. R.
    Verma, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/175615.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    biocomposites
    almond shell
    coconut fiber
    microstructure
    thermal analysis
    biokompozyt
    łuski migdałowca
    włókno kokosowe
    mikrostruktura
    analiza cieplna
    Opis:
    In this research, the suitability of almond shell and coconut fiber as a renewable agricultural residue for manufacturing of biocomposite to be used as a replacement of wood was investigated. The use of agriculture waste as a reinforcement in composite may result in several environmental and socioeconomic benefits. Biocomposite containing different weight percentage of almond shell particle (10, 20, 30, 40 and 50 wt%) and coconut fiber (2, 4 and 6 wt%) mixed with 20 wt% of almond shell particles were made using epoxy resin and 0.5 wt% of Tricresyl Phosphate. Thermal stability test and morphology (SEM) of the biocomposite were determined.
    W artykule przedstawiono analizę wyników badań trwałości materiałów biokompozytowych umacnianych łuskami migdałowca i włóknami kokosowymi, używanych jako zamienniki drewna. Zastosowanie odpadów rolniczych jako elementów umacniających materiały kompozytowe pozytywnie oddziałuje zarówno na środowisko naturalne, jak i kryteria ekonomiczne ich producentów. W badaniach stosowano materiały biokompozytowe o zawartości cząstek łusek migdałowca od 10 do 50% mas. oraz włókien kokosowych 2, 4 i 6% mas. Osnową wytworzonych kompozytów była żywica epoksydowa z dodatkiem fosforanu trikrezylowego 0,5% mas. Wykonano badania stabilności cieplnej wytworzonych biokompozytów oraz ich mikrostruktury przy zastosowaniu mikroskopu skaningowego SEM.
    Źródło:
    Advances in Manufacturing Science and Technology; 2014, 38, 2; 37-50
    0137-4478
    Pojawia się w:
    Advances in Manufacturing Science and Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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