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    Wyświetlanie 1-11 z 11
    Tytuł:
    Validation of HPLC Method for Quantitative Determination of Pirimiphos methyl
    Autorzy:
    Tamilselvan, C.
    Joseph, S. J.
    Mugunthan, G.
    Ahamed, S.S. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/411984.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    pirimiphos methyl
    HPLC
    UV-spectrophotometric
    linearity
    precision
    recovery
    quantification
    LOD and LOQ
    Opis:
    The objective of this research to optimise the HPLC method was developed for quantitative determination of Pirimiphos-methyl. Chromatographic separation was achieved on a 250 x 4.6 mm i.d. reversed phase column Qualisil BDS 5u C18, Using deionized acetonitrile:water in the ratio of 85:15 v/v respectively as mobile phase. The eluent was monitored at 254 nm. A sharp peak was obtained for the Pirimiphos-methyl at 9.29 min. The UV Spectrophotometric method performed at 254 nm after full scan analysis using methanol as a solvent. The result revealed that both methods are suitable to carry out routine analysis of Pirimiphos methyl, However HPLC results showed high precise, accurate and sensitive than the UV Spectrophotometer. Hence HPLC method is suitable for trace analysis of Pirimiphos methyl in environmental samples.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 9; 93-102
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The paleoecology of the Late Miocene mammals from the Optima Local Fauna of Oklahoma, USA
    Autorzy:
    Frederickson, Joseph A.
    Cohen, Joshua E.
    Engel, Michael H.
    Hunt, Tyler C.
    Wilbert, Greg A.
    Castaneda, Olga S.
    Czaplewski, Nicholas J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2216233.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Mammalia
    grassland
    tooth breakage
    Neogene
    North America
    mesowear
    savanna
    stable isotopes
    Opis:
    The Optima Local Fauna represents an important glimpse into the ecological transition between savannah and grassland during the late Miocene (Hemphillian) of what is now the southcentral Great Plains of North America. Though dominated by horses, herbivores from the Optima are morphologically diverse, bearing adaptations for both browsing and grazing lifestyles. Likewise, the carnivorans show similar ranges of size and presumed dietary behavior. In this study, we used carbonate isotope, mesowear, and tooth breakage and wear analyses to investigate the dietary complexity of mammals from a single site collected by the Oklahoma Museum of Natural History. Seventeen taxa were analyzed, including five perissodactyls (Teleoceras hicksi, Dinohippus interpolatus, Neohipparion eurystyle, Nannippus ingenuus, and Astro hippus ansae), four artiodactyls (Texoceros guymonensis, Pediomeryx hemphillensis, Megatylopus matthewi, and Platy gonus sp.), a single proboscidean (Mammut sp.), two rodents (Dipoides indet. and Umbogaulus monodon), and five carni vorans (Agriotherium schneideri, Amphimachairodus coloradensis, Borophagus secundus, Eucyon davisi, Pliotaxi dea cf. nevadensis). Both stable isotope analysis and dental mesowear indicate a broad dietary partitioning occurred among the Optima herbivores, where the artiodactyls were identified as mixed feeders and the perissodactyls were recovered as grazers. In the carnivorans, the large felid Amphimachairodus coloradensis was a hypercarnivore with limited tooth breakage and an enriched δ13C signature, indicating low carcass utilization and a prey preference for horses. The canids had a more generalized diet, with B. secundus showing a greater proportional consumption of carcasses through a higher tooth breakage rate. The large ursid Agriotherium schneideri is here interpreted as an omnivore based on depleted δ13 C values. Overall, we found evidence for a diversity of dietary niches in both carnivores and herbivores during the late Hemphillian in Oklahoma, likely driven by the expansion of grasslands in the region.
    Źródło:
    Acta Palaeontologica Polonica; 2022, 67, 1; 221-238
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spectral correlation analysis of Hammett substituent constants and biological activities of some (E)-1-(4-phenoxyphenyl)-3-phenylprop-2-en-1-ones
    Autorzy:
    Kalyanasundaram, N.
    Sakthinathan, S. P.
    Suresh, R.
    Kamalakkannan, D.
    Joseph, S. J.
    Vanangamudi, G.
    Thirunarayanan, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/412539.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    substituted styryl 4-phenoxyphenylketones
    UV-spectra
    IR spectra
    NMR spectra
    Hammett constants
    substituent effects
    regression analysis and antimicrobial activities
    Opis:
    A series of aryl chalcones have been synthesized from 4-phenoxyacetophonone with various substituted benzaldehydes. The purity of all chalcones has been checked using their physical constants and spectral data. These spectral data have been correlated with Hammett substituent constants and F and R parameters using single and multi-linear regression analysis. From the results of statistical analysis, the effect of substituents on the above spectral data has been studied. The single parameter correlation with few Hammett constants and F and R parameters gave satisfactory correlation coefficients whereas all multiple correlations gave satisfactory correlation coefficients with Resonance, Field and Swain-Lupton’s parameters. The antimicrobial activities of all chalcones have been studied using Bauer-Kirby method.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 9; 23-47
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spectral correlation analysis and antimicrobial activities of some 2,4-dimethoxy phenyl chalcones
    Autorzy:
    Joseph, S. J.
    Arulkumaran, R.
    Kamalakkannan, D.
    Sakthinathan, S. P.
    Sundararajan, R.
    Suresh, R.
    Vijayakumar, S.
    Ranganathan, K.
    Kalyanasundaram, N.
    Vanangamudi, G.
    Thirunarayanan, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/412661.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    substituted styryl 2
    4-dimethoxy phenyl ketones
    UV spectra
    IR spectra
    NMR spectra
    substituent effects
    antimicrobial activities
    Opis:
    A series of 2,4-dimethoxy phenyl chalcones have been synthesized by Crossed-Aldol condensation of 2,4-dimethoxy phenyl and various substituted benzaldehydes. The purities of these chalcones have been checked by their physical constants, UV, IR, NMR and MASS spectral data. The spectral data of these chalcones have been correlated with Hammett sigma constants, F and R parameters using single and multi-linear regression analysis. From the results of statistical analysis, the effects of substituents on the spectral group frequencies have been discussed. The anti-microbial activities of these chalcones have been evaluated using Bauer-Kirby method.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 4; 48-65
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Letter to the Editor (August 24, 2017) concerning the paper “Occupational exposure to radon for underground tourist routes in Poland: Doses to lung and the risk of developing lung cancer”
    Autorzy:
    Mortazavi, S.M. J.
    Bevelacqua, Joseph J.
    Fornalski, Krzysztof W.
    Pennigton, Charles W.
    Welsh, James
    Janiak, Marek K.
    Dobrzyński, Ludwik
    Doss, Mohan
    Powiązania:
    https://bibliotekanauki.pl/articles/2162022.pdf
    Data publikacji:
    2018-10-24
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    occupational exposure
    radon
    lung cancer
    risk
    Polska
    underground routes
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2018, 31, 5; 703-706
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ichnology of mixed siliciclastic-carbonate sedimentary cycles and their sequence stratigraphic context: Kaladongar Formation (Middle Jurassic) of Kachchh, western India
    Autorzy:
    Joseph, J. K.
    Patel, S. J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2077326.pdf
    Data publikacji:
    2015
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    sequence stratigraphy
    mixed siliciclastic-carbonates
    ichnology
    Kachchh Basin
    western India
    stratygrafia sekwencji
    ichnologia
    Kachchh
    Indie
    Opis:
    The Middle Jurassic Kaladongar Formation, Patcham Island, Kachchh, western India, comprises of a 353 m-thick mixed siliciclastic-carbonate succession of asymmetrical shallowing and deepening upward sedimentary cycles. It is subdivided into five main facies i.e., micritic sandstone, allochemic sandstone, sandy allochem limestone, micritic mudrock, and sandy micrite along with shales and conglomerates. Eight trace fossil assemblages comprising 34 ichnogenera are defined, including the Asterosoma, Gyrochorte, Rhizocorallium, Thalassinoides, Planolites–Palaeophycus, Phycodes, Ophiomorpha, and Skolithos assemblages that reflect five depositional facies: offshore, transitional, lower, middle, and upper shoreface. The sedimentary packages and associated trace fossil assemblages are separated by various discontinuities, stratigraphic surfaces and stratigraphic boundaries within the succession of the Kaladongar Formation and reveal three phases of regression (RST-I, RST-II and RST-III) and three phases of transgression (TST-II, III and IV) within the 3rd order systems tracts developed in the slowly transgressing sea during the Bajocian-Bathonian time interval.
    Źródło:
    Volumina Jurassica; 2015, 13, 2; 81--99
    1896-7876
    1731-3708
    Pojawia się w:
    Volumina Jurassica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Facies characterisation of a shallow-water deltaic succession: the Upper Jurassic Wagad Sandstone Formation of Kachchh, western India
    Autorzy:
    Joseph, J. K.
    Patel, S. J.
    Powiązania:
    https://bibliotekanauki.pl/articles/94430.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Tematy:
    Lithofacies
    Oxfordian/Kimmeridgian
    offshore
    shallow-water delta
    South Wagad Fault
    litofacja
    oksford
    kimeryd
    delta
    Opis:
    Ancient deltaic facies are difficult to differentiate from tidally influenced shallow-marine facies. The Wagad Sandstone Formation of the Wagad Highland (eastern Kachchh Basin) is typified by offshore and deltaic facies with sedimentary characteristics that represent different conditions of hydrodynamics and related depositional processes. The study area, the Adhoi Anticline, constitutes a ~154-m-thick, shale-dominated sequence with progressive upward intercalations of bioturbated micritic sandstone and quartz arenite. Two thick Astarte beds (sandy allochemic limestone), with an erosional base and gravel blanketing, illustrate tidal amplification and high-energy stochastic events such as storms. Sedimentological characteristics document three depositional facies: an offshore, shale-dominated sequence prograding to proximal prodeltaic micritic sandstone and quartz arenite with sandy allochemic limestones, further prograding to mouth bars and abandoned channel deposits. The Wagad Sandstone Formation displays depositional environmental conditions that are dissimilar from those of coeval deposits in Kachchh sub-basins as well as on regional and global scales. This is attributed to a reactivation of the Kachchh Mainland and South Wagad faults which resulted in detachment and uplift of the Wagad block which then experienced prograding deltaic conditions.
    Źródło:
    Geologos; 2018, 24, 2; 137-150
    1426-8981
    2080-6574
    Pojawia się w:
    Geologos
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of ethanol extract of Graptophyllum pictum (L.) Griff. on cisplatin induced nephrotoxicity in rats
    Wpływ wyciągu alkoholowego z Graptophyllum pictum (L.) na działanie cisplatyny wywołującej nerfotoksyczność u szczurów
    Autorzy:
    Srinivasan, K.K.
    Mathew, J.E.
    Joseph, K.
    Vachala, S.D.
    Malini, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/71148.pdf
    Data publikacji:
    2011
    Wydawca:
    Instytut Włókien Naturalnych i Roślin Zielarskich
    Tematy:
    ethanol extract
    Graptophyllum pictum
    antioxidant
    cisplatin
    nephrotoxicity
    rat
    Opis:
    The purpose of the present study is to investigate whether the alcoholic extract of Graptophyllum pictum (L.) Griff. could decrease the intensity of nephrotoxicity in albino rats. Cisplatin at a single dose of 12 mg/kg body weight was administered intraperitonially to albino male Wistar rats. Nephrotoxicity was assessed by determining the serum creatinine and urea levels as well as renal antioxidant status in rats after cisplatin administration. Ethanolic extract of G. pictum at 150 and 300 mg/kg body weight was administered orally after cisplatin injection for 15 days. The extracts could significantly reduce the elevated serum creatinine and urea levels. Renal antioxidant defence systems, such as superoxide dismutase, catalase, glutathione peroxidase activities and reduced glutathione level, depleted by cisplatin therapy were restored to normal by treatment with the extract. Cisplatin induced lipid peroxidation was also found markedly reduced by treatment with the extract. This result indicated that ethanolic extract of G. pictum rendered significant preventive effect against cisplatin induced nephrotoxicity.
    Celem niniejszej pracy było zbadanie właściwości wyciągu alkoholowego z Graptophyllum pictum (L.) zmniejszającej nefrotoksyczność indukowaną cisplatyną u szczurów. Cisplatynę podawano szczurom dootrzewnowo w pojedynczej dawce w ilości 12 mg/kg masy ciała. Nefrotoksyczność oceniono na podstawie określenia stężenia kreatyniny w surowicy, poziomu mocznika, a także aktywności przeciwutleniającej nerek u szczurów. Wyciąg alkoholowy z G. pictum podawano dożołądkowo w dawkach od 150 do 300 mg/kg masy ciała przez 15 dni po uprzednim podaniu cisplatyny. Wykazano, że podawanie ekstrakty mogą istotnie obniżyć stężenie mocznika i kreatyniny podwyższone przez cisplatynę. Ponadto podawanie cisplatyny wywołało zaburzenia w działaniu dysmutazy ponadtlenkowej, kata65 Effect of ethanol extract of Graptophyllum pictum (L.) Griff. on cisplatin induced nephrotoxicity in rats lazy, peroksydazy glutationowej, powodując zaburzenia mechanizmów obronnych nerek oraz obniżenie poziomu glutationu, natomiast ich prawidłowe funkcjonowanie zostało przywrócone po podaniu ekstraktu. Badanie również wykazało, że wzrost poziomu peroksydacji tłuszczów wywołany za pomocą cisplatyny zostaje znacznie zmniejszony w wyniku podawania ekstraktu. Przedstawione wyniki badań wskazują na prewencyjne działanie wyciągu alkoholowego otrzymanego z G. pictum przeciwko nefrotoksyczności indukowanej cisplatyną.
    Źródło:
    Herba Polonica; 2011, 57, 2
    0018-0599
    Pojawia się w:
    Herba Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of bispyribac sodium 10 % SC (herbicide) residue level in straw, grain and soil using HPLC method
    Autorzy:
    Tamilselvan, C.
    Joseph, S.J.
    Angayarkanni, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/11935.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    determination
    bispyribac sodium
    herbicide residue
    residue level
    straw
    grain
    soil
    high performance liquid chromatography
    Opis:
    A field trial was conducted to evaluate the residues of Bispyribac sodium 10 % SC on rice crop during Kharif season 2013 at Kandikai in Thiruvallur District, Tamilnadu, India. Randomized block design was followed withthree treatments forthree replicates. Bispyribac sodium 10 % SC 200 g a.i./ha, 500 g a.i./ha and control (water spray) was sprayed using hand operated Maax battery sprayer with a spray volume of 300 litres per hectare at 15 days after transplantation of rice crop (ADT 45). At harvest, samples of grain, straw and soil were collected replicate wise from each treatment along with the control. These samples were stored in icebox and transfer to the laboratory under cooled condition for analysis.All the residues samples were analyzed for Bispyribac sodium content by a validated HPLC method at the minimum detectable concentration of 0.01 ppm. The result revealed that no detectable level of Bispyribac sodium in straw, grain and soil at harvest. Thepost treatmentand pre-harvest intervalwas 60 days after transplantation.
    Źródło:
    International Letters of Natural Sciences; 2014, 12, 1
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Biological degradation of metribuzin and profenofos by some efficient bacterial isolates
    Autorzy:
    Tamilselvan, C.
    Joseph, S.J.
    Mugunthan, G.
    Sathish Kumar, A.
    Syed Musthaq Ahamed, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/11692.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    biological degradation
    metribuzin
    profenofos
    bacterial isolate
    Pseudomonas aeruginosa
    Staphylococcus aureus
    Bacillus subtilis
    Opis:
    The soil sample was collected from the paddy field of Sriperumbudur, Tamilnadu which is having a history of repeated pesticide applications. The isolation of efficient pesticide degrading bacteria was identified as Pseudomonas aeruginosa, Staphylococcus aureus and Bacillus subtilis. The growth of the three pesticide degrading isolates was assessed in Minimal salt broth containing 25 ppm of pesticides. Two popularly used pesticides Metribuzin and Profenofos were selected for this study. Among the three bacterial isolates, the bacteria Bacillus subtilis utilized the pesticides effectively and showed maximum growth. The growth of the three pesticides degrading isolates Pseudomonas aeruginosa, Staphylococcus aureus and Bacillus subtilis was assessed in Minimal salt broth containing 25 ppm of pesticides at different temperature levels (25 °C, 30 °C, 35 °C, 40 °C, 45 °C, 50 °C & 55 °C) and pH levels (pH 4, pH 5, pH 6, pH 7 & pH 8) and carbon sources (Lactose, Dextrose, Fructose, Mannose & Galactose) and nitrogen sources Peptone, Yeast extract, Beef extract, Malt extract and Casein respectively. The maximum growth rate of bacteria was recorded at 35 °C and pH 6. The maximum growth of bacteria was in the presence of Dextrose followed by Fructose, Galactose and Mannose. The least growth was recorded in Lactose broth culture. The maximum growth of bacteria was in the presence of Malt extract followed by Peptone, Yeast extract and Casein. The least growth was recorded in Beef extract broth culture. The bacterial isolates showed maximum growth in the Minimal salt broth containing Profenofos followed by Metribuzin.
    Źródło:
    International Letters of Natural Sciences; 2014, 09
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of substituent effects and antimicrobial activities of some 2ʹ,5ʹ-dimethyl phenyl chalcones
    Autorzy:
    Joseph, S. J.
    Kamalakkannan, D.
    Arulkumaran, R.
    Sakthinathan, S. P.
    Suresh, R.
    Sundararajan, R.
    Vijayakumar, S.
    Ranganathan, K.
    Vanangamudi, G.
    Thirunarayanan, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/412597.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    substituted styryl 2
    5ʹ-dimethyl phenyl chalcones
    UV spectra
    IR spectra
    NMR spectra
    substituent effects
    antimicrobial activities
    Opis:
    Some 2ʹ,5ʹ-dimethyl phenyl chalcones have been synthesized by Crossed-Aldol condensation between 2,5-dimethyl acetophenone and various substituted benzaldehydes using catalytic amount of sodium hydroxide and ethanol. The yields of the chalcones are more than 93 %. The purities of these chalcones have been checked by their physical constants, UV, IR, NMR and MASS spectral data. The spectral data of these chalcones have been correlated with Hammett sigma constants, F and R parameters using single and multi-linear regression analysis. From the results of statistical analysis, the effects of substituents on the spectral group frequencies have been discussed. The anti-microbial activities of these chalcones have been evaluated using Bauer-Kirby method.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 5; 99-123
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-11 z 11

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