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    Wyświetlanie 1-13 z 13
    Tytuł:
    Warunki rozwoju Aspergillus flavus i wytwarzania aflatoksyny B1 w majonezach
    Conditions of development of A. flavus and production of aflatoxin B1 in mayonnaises
    Autorzy:
    Burzynska, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/874953.pdf
    Data publikacji:
    1973
    Wydawca:
    Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
    Tematy:
    Aspergillus flavus
    aflatoksyna B1
    majonezy
    warunki rozwoju
    zywnosc
    badania naukowe
    Źródło:
    Roczniki Państwowego Zakładu Higieny; 1973, 24, 1
    0035-7715
    Pojawia się w:
    Roczniki Państwowego Zakładu Higieny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of the presence of Aspergillus flavus in mastitis milk with PCR
    Autorzy:
    Sukru, K.
    Ugur, P.
    Ugur, A.
    Tugba, Y.H.
    Powiązania:
    https://bibliotekanauki.pl/articles/2049754.pdf
    Data publikacji:
    2019
    Wydawca:
    Fundacja na Rzecz Młodych Naukowców
    Tematy:
    Aspergillus flavus
    mastitis
    milk sample
    aflatoxin M1
    ELISA test
    polymerase chain reaction
    A. flavus
    Aflatoxin M1
    mastitis milk
    ELISA
    PCR
    Opis:
    In this study, milk samples were taken in sterile 20 ml containers from 90 cows with clinical mastitis in various enterprises around Aydın province between May-September 2017. The presence of Aspergillus flavus M1 toxin in milk samples was investigated by ELISA. Aflatoxin M1 ELISA results were compared with positive controls with 0 ppt, 5 ppt, 15 ppt, 30 ppt, 60 ppt and 100 ppt. For the 88 samples examined; 5 ppt in 7 (8,0 %), 15 ppt in 12 (13,6 %), 100 ppt in 32 (36,4 %) and 0 ppt in 37 (42,0 %) aflatoxin M1 was detected. According to these results, 32 (36,4 %) AFM1 positivity was detected in the European Union countries over the limit (50 ppt) accepted for raw milk. In our study, DNA obtained from 88 mastitis milk samples examined with Aflatoxin M1 ELISA kit was subjected to Aspergillus flavus species specific PCR process. As a result of PCR; Aflatoxin M1 at a level of 0 ppt in 7 (36,8 %), 5 ppt in 1 (% 5,2), 15 ppt in 2 (10,5 %) and 100 ppt in 9 (47,5 %) ELISA kit toxin presence was determined. As a result, 32 samples of 100 ppt AFM1 positivity were detected by ELISA and 9 samples 100 ppt positivity was detected by PCR in our study. The results of the ELISA test revealed that more positive results were formed due to cross-reactions, and the PCR method with FLA gene primers was more reliable for diagnosis.
    Źródło:
    Environment, Earth and Ecology; 2019, 3, 1; 35-41
    2543-9774
    2451-4225
    Pojawia się w:
    Environment, Earth and Ecology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Volatile profiles and aflatoxin productionby toxigenic and non-toxigenic isolates of Aspergillus flavus grown on sterile and non-sterile cracked corn Anthony J.
    Autorzy:
    De Lucca, A.J.
    Boue, S.M.
    Carter-Wientjes, C.
    Bhatnagar, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/51065.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Medycyny Wsi
    Opis:
    Aspergillus flavus is a saprophytic fungus which can grow on corn and produce aflatoxins which render it unsafe for consumption as food and feed. In this study, aflatoxin and non-aflatoxin producing isolates of A. flavus were grown separately on wet (20% water added), sterile or non-sterile cracked corn. Wet and dry cracked corn controls were included as needed. Secondary metabolic volatiles were identified and aflatoxin concentrations determined over a 12-day period. Volatiles unique to the toxigenic A. flavus isolates were determined by comparison with volatiles produced by the respective corn controls and the non-toxigenic A. flavus isolate. The number and identity of the volatiles produced by these A. flavus isolates varied by isolate, whether sterile or non-sterile corn was the substrate, and the sampling day. Overall, most of the volatiles were produced before day 8 after inoculation. Aflatoxin production was 10-fold lower on the sterile corn, compared to the nonsterile corn. Volatiles unique to the aflatoxin producing isolates were identified on both substrates after comparison with those produced by the non-aflatoxin producing isolate, as well as the corn control samples. Results indicate that several factors (substrate, fungal isolate, culture age) affect volatile and aflatoxin production by A. flavus.
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2012, 19, 1
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mapowanie mikologicznych zagrożeń środowiska z zastosowaniem GIS-u
    Mapping of environmental mycologic hazards using GIS method
    Autorzy:
    Lonc, E.
    Wieliczko, A.
    Plewa, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/2143566.pdf
    Data publikacji:
    2009
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Tematy:
    zagrozenia mikrobiologiczne
    grzyby
    fermy zwierzat
    mapowanie
    System Informacji Geograficznej
    Aspergillus fumigatus
    Aspergillus flavus
    zagrozenia srodowiska
    Opis:
    Intensive poultry production is associated with extreme densities of birds crammed into industrial-scale hen houses. Consequently, the bird keepers are exposed to elevated concentrations of dust. Exposure to dust, containing pathogenic mycological agents, may cause exacerbate asthma, allergic alveolitis, as well as organic dust toxic syndrome. Geographic Information System (GIS) allows to view, understand, question, interpret, and visualize biological data, among them mycological threats. The aim of the presently reported study was to create the mycological database from the chicken farms and their visualization on the map of Lower Silesia, Poland. Field data for Aspergillus fumigatus, A. flavus, Candida sp. were collected in Wrocław laboratory in 2008. GIS database was formed using ArcView 9.2. computer software. The visualization data on the digital maps were analyzed for the Health and Safety Executive.
    Źródło:
    Wiadomości Parazytologiczne; 2009, 55, 4; 425-428
    0043-5163
    Pojawia się w:
    Wiadomości Parazytologiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effectiveness of the chemical stabilizers of Talaromyces flavus in biological control of tomato and greenhouse cucumber vascular wilt disease
    Autorzy:
    Bahramian, D.
    Naraghi, L.
    Heydari, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/66448.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    effectiveness
    chemical stabilizer
    Talaromyces flavus
    biological control
    tomato
    greenhouse
    cucumber
    vascular wilt
    wilt disease
    Fusarium oxysporum
    Verticillium dahliae
    Opis:
    Fungal antagonist, Talaromyces flavus, is one of the most important biological agents of soil-borne fungal diseases including Verticillium and Fusarium wilt. In this study, to increase the effectiveness of T. flavus isolates obtained from greenhouse cucumbers and field grown tomatoes five chemical stabilizers were evaluated. Based on the results of previous studies, the most effective substrate for the growth, sporulation and stability of T. flavus isolates related to the above-mentioned plants was a mix of rice bran and peat-moss. Different chemical stabilizers were mixed with the above-mentioned substrate containing spore suspensions of various T. flavus isolates. For each plant, a completely randomized experiment was conducted under greenhouse conditions with seven treatments and three replications. The results of this study indicated that treatments containing sodium nitrate and D-cycloserine were more effective than those containing other stabilizers. The overall results of this study suggest that the use of some chemical stabilizers may enhance the biocontrol potential of fungal antagonists in controlling different plant diseases including Verticillium and Fusarium wilt.
    Źródło:
    Journal of Plant Protection Research; 2016, 56, 3
    1427-4345
    Pojawia się w:
    Journal of Plant Protection Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The susceptibility of Aspergillus and Penicillium to recent antimycotics
    Autorzy:
    Macura, A.B.
    Pawlik, B.
    Szczepka, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/838594.pdf
    Data publikacji:
    1998
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Tematy:
    Aspergillus fumigatus
    Penicillium
    susceptibility
    Aspergillus flavus
    fungi
    Aspergillus
    Źródło:
    Annals of Parasitology; 1998, 44, 3
    0043-5163
    Pojawia się w:
    Annals of Parasitology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ jonów metali na wzrost oraz akumulację Cd, Ni i Li w biomasie grzybni Aspergillus flavus Link
    The effect of heavy metals on growth and uptake of Cd, Ni and Li ions by biomass of mycelium of Aspergillus flavus Link
    Autorzy:
    Barabasz, W.
    Galus, A.
    Opalinska-Piskosz, J.
    Sepiol, J.
    Tomasik, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/796457.pdf
    Data publikacji:
    1997
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Źródło:
    Zeszyty Problemowe Postępów Nauk Rolniczych; 1997, 448a
    0084-5477
    Pojawia się w:
    Zeszyty Problemowe Postępów Nauk Rolniczych
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Volatile profiles of toxigenic and non-toxigenic Aspergillus flavus using SPME for solid phase extraction
    Autorzy:
    De, Lucca A J
    Boue, S.M.
    Carter-Wientjes, C.H.
    Bland, J.M.
    Bhatnagar, D.
    Cleveland, T.E.
    Powiązania:
    https://bibliotekanauki.pl/articles/50286.pdf
    Data publikacji:
    2010
    Wydawca:
    Instytut Medycyny Wsi
    Tematy:
    Aspergillus flavus
    toxigenic strain
    non-toxigenic strain
    secondary metabolite
    aflatoxin
    maize
    volatile profile
    solid-phase microextraction
    solid-phase extraction
    potato
    isolate
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2010, 17, 2; 301-308
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Timber degrading fungi in sawmills of Gujarat, India
    Autorzy:
    Nagadesi, P.K.
    Arya, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/11082.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    timber
    degradation
    fungi
    sawmill
    wood decay
    Schizophyllum commune
    Flavodon flavus
    Daldinia concentrica
    microorganism
    Gujarat
    India
    forest cover
    Opis:
    Timer decay is caused by primarily enzymatic activities of microorganisms. For the first time fungal diversity of timber degrading fungi was studied in Gujarat, India. Timber Degrading Fungi belonging to Aphyllophorales are economically important as many of these cause serious damage in sawmills of Gujarat. To find out the association of the timber degrading fungi and timber decay problems in sawmills a survey was conducted during 2007 to 2011 in different sawmills of 5 districts of Gujarat i.e. Vadodara, Ahmedabad, Bharuch, Rajkot and Jamnagar. In the present study teak wood present in sawmills was infected with 14 types of fungi in which Lenzites sterioides and Trametes versicolor damaged the wood severely was reported for the first time. In all 94 sawmills were surveyed, the 28 sawmills were from Vadodara, 29 from Ahmedabad, 12 from Bharuch, 21 from Rajkot and 4 from Jamnagar. Out of 94 sawmills survyed, 84 sawmills were having timber rotting fungi associated with wood. Maximum fifteen and thirteen fungal species were observed in saw mills of Chhani road, followed by 11 in Station road, 7 in Dhabhoi road and 6 in Harni, Vadodara. Fours woods uninfected are Beyo, Marinty, Ash, and Arjun. Fourteen different types of fungi were found associated with teak, followed by seven in pinus, madhuca, Acacia nilotica, six in babul, neem, four in tamarind, Pithacoelobium and three in mango, Eucalyptus, African Mahagoni, Kapoor, Peltophoram rouxburghii, Derris pinnata wood respectively. The commonly observed timber decaying fungi were Schizophyllum commune, Flavodon flavus and Ganoderma lucidum belonging to Basidiomycota. Ascomycota members included was Daldinia concentrica and Xylaria polymorpha.
    Źródło:
    International Letters of Natural Sciences; 2014, 02
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fungal colonisation of tracheotomy tubes in patients diagnosed with larynx cancer
    Autorzy:
    Gniadek, A.
    Krzysciak, P.
    Hawryszuk, A.
    Wojcikowska, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/6408.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Tematy:
    fungal colonization
    fungi
    Aspergillus fumigatus
    Aspergillus flavus
    Candida albicans
    tracheotomy
    tube
    risk factor
    patient
    larynx cancer
    Źródło:
    Annals of Parasitology; 2016, 62, Suppl.
    0043-5163
    Pojawia się w:
    Annals of Parasitology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mapowanie mikologicznych zagrozen srodowiska z zastosowaniem GIS-u
    Mapping of environmental mycologic hazards using GIS method
    Autorzy:
    Lonc, E.
    Wieliczko, A.
    Plewa, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/838433.pdf
    Data publikacji:
    2009
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Tematy:
    zagrozenia mikrobiologiczne
    grzyby
    fermy zwierzat
    mapowanie
    System Informacji Geograficznej
    Aspergillus fumigatus
    Aspergillus flavus
    zagrozenia srodowiska
    Źródło:
    Annals of Parasitology; 2009, 55, 4; 425-428
    0043-5163
    Pojawia się w:
    Annals of Parasitology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of Total Aflatoxins Level of Two Major Nuts Consumed in Gboko Benue State, Nigeria
    Autorzy:
    Tor, P. N.
    Yande, J. T.
    Ijuo, G. A.
    Oloruntoba, S. O.
    Powiązania:
    https://bibliotekanauki.pl/articles/1030152.pdf
    Data publikacji:
    2020
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Anacardium occidentale
    Arachis hypogaea
    Aspergillus flavus
    Aspergillus nomius
    Aspergillus parasiticus
    Cashew Nuts
    Fungal / Bacteria Counts Total Aflatoxins
    Groundnuts
    Opis:
    The aim of this study was to assess the total aflatoxin (TAT) contents of roasted, dehulled and hulled groundnuts (Arachis hypogaea L.) and of roasted cashew nuts (Anacardium occidentale), sold and consumed in some public areas of Gboko metropolis of Benue State, Nigeria. The items were sampled from 5 different locations based on human traffic densities and sellers of the product and then analysed for TAT contents using direct competitive Enzyme-linked Immunosorbent Assay (ELISA) method. In the roasted cashew nuts, TAT was only detected in samples collected at two of the sampling sites; Mechanic Site/Adekaa (>20.00 µg/kg) and Gboko Main Market (0.30 µg/kg) but not detected in samples collected at the three others (Gboko motor park, Abagu and Tipper Garage). Nevertheless, the detected levels at Gboko Main Market were below the maximum tolerable limits (MTL) of 4 µg/kg set by EU and 10.0 µg/kg set by CAC and NAFDAC, Nigeria for ‘ready to eat’ food substances unlike the situation at the Mechanic Site/Adekaa sampling location. In the roasted groundnuts, levels of TAT higher than the indicated MTL were documented in samples collected at Tipper Garage (12.20 µg/kg) and Abagu (5.70 µg/kg) only exceeded the EU MTL, while the results at Gboko motor parks (2.00 µg/kg), Gboko main market (1.30 µg/kg) and Mechanic site/Adekaa (0.50 µg/kg) were below the EU MTL. Samples of hulled groundnuts collected at Gboko main market recorded TAT levels of 0.10 µg/kg while at Mechanic site/Adekaa it was not detected. Dehulled groundnuts sampled at Gboko Main market (0.40 µg/kg) and Mechanic site/Adekaa (0.20 µg/kg) recorded TAT levels within CAC and NAFDAC MTLs. The dehulled groundnuts samples collected at the Tipper Garage sample location, which recorded a moisture level of 4.20 %; yet among the rest of all the other samples had moisture levels below the recommended maximum tolerable limits of 5.80 % for stored groundnuts and cashew nuts. The results of microbial counts revealed that total mesophilic bacteria ranged between < 1.0 × 101 to >1.0 × 102 CFU/L, fungi varied between < 1.0 ×101 to > 1.0 × 101 CFU/L while E.coli counts varied between 0.00 to 0.32 CFU/L. The microbial contagion was generally low. Nevertheless, prolonged feasting on the aflatoxin-contaminated nuts is possible in the study area due to the rising food insecurity of majority of the masses. The chronic and acute exposures therefore, presents health concern of aflatoxicosis.
    Źródło:
    World Scientific News; 2020, 143; 170-180
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Biocatalytic ketone reduction - a study on screening and effect of culture conditions on the reduction of selected ketones
    Autorzy:
    Kuncham, R.
    Gurumurthy, K.T.
    Chandan, N.
    Javed, A.
    Ashwini, L.S.
    Shenoi, R.
    Baranwal, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/11870.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    biocatalysis
    ketone reduction
    screening
    culture condition
    Aspergillus ochraceus
    Aspergillus flavus
    Aspergillus tubingenesis
    Aspergillus niger
    Rhizopus stolonifer
    baker's yeast
    enzyme activity
    enzyme expression
    bioconversion
    Opis:
    Microbial conversions are gaining importance in the synthesis of important drug metabolites and their intermediates as they are good alternative to chemical synthesis since they are enantio-selective and regio-selective and even can be carried out at ambient temperature and atmospheric pressure. Till date, biocatalytic reduction of acetophenone and its derivatives has been widely reported. In the present study, we have made an attempt to carry out the microbial bioreduction of o-hydroxyacetophenone by screening some of the selected microorganisms which were obtained from culture collection centre as well as those which are isolated in our Microbiology lab. The selected microorganisms include Aspergillus ochraceous, Aspergillus flavus, Aspergillus tubingenesis, Aspergillus niger, Rhizopus stolanifer MTCC 162, Rhizopus stolanifer MTCC 2591 and Baker’s yeast.Among the seven microorganisms screened for the bioreduction of o-hydroxyacetophenone, Baker’s yeast and Aspergillus tubingenesis showed significant bioconversion where as Aspergillus ochraceous exhibited the least bioconversion.In our earlier study it was found that Aspergillus flavus has the required bioreductase enzyme, which showed the maximum conversion of p-chloroacetophenone to p-chlorophenylethanol. Hence optimization of culture conditions to get maximum enzyme expression and hence maximum conversion was thought off. The parameters considered for the study include effect of various Carbon sources, Nitrogen source, Metal ions, incubation Temperature and media pH on enzyme expression. The optimized culture a condition at which maximum bioconversion was achieved was maltose among various carbon sources. Tryptone was found to have maximum effect among the nitrogen sources. Media pH 7.6 and incubation temperature of 35 °C was found to be favourable for maximum enzyme activity. Among various divalent metal salts, addition of magnesium sulphate to the media significantly increased the enzyme activity.
    Źródło:
    International Letters of Natural Sciences; 2014, 01
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-13 z 13

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