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    Wyświetlanie 1-5 z 5
    Tytuł:
    The influence of varying level of wheat proteinaceous inhibitors in wheat-based artificial feed on development parameters of selected stored product insects
    Autorzy:
    Warchalewski, J R
    Gralik, J.
    Winiecki, Z.
    Nawrot, J.
    Piasecka-Kwiatkowska, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/65768.pdf
    Data publikacji:
    2001
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    wheat starch
    varying level
    weevil
    plant protection
    wheat grain
    flour moth
    Sitophilus granarius
    insect
    Tribolium confusum
    feed
    insect foraging
    development parameter
    Anagasta kuehniella
    feeding intensity
    alpha-amylase inhibitor
    artificial wheat-based feed
    wheat
    larval development
    flour beetle
    artificial feed
    granary weevil
    Opis:
    The artificially made kernels from ground wheat grain, commercial wheat starch and wheat proteinaceous α-amylase inhibitors in different proportions were used as feed for adults of the granary weevil (Sitophilus granarius L.). In the case of larvae of the confused flour beetle (Tribolium confusum Duv.) and the Mediterranean flour moth (Anagasta kuehniella Zell.) the friable feed mixture were used. The survival of S. granarius adults has not been correlated with the soluble proteins extracted from wheat and amylolytic activity located in this protein fraction. On the other hand the weight of dust (the index of feeding intensity) produced during feeding has depended on the presence of α-amylase and trypsin inhibitors in wheat-based feed. A. kuehniella larvae have not developed at all on feed consisted of 50% wheat starch and 50% of crude a-amylase inhibitors from wheat. The same feed has caused 15.1 days of extension in development time of T. confusum larvae. lt attests to specific native enzymatic apparatus existing in alimentary canals of three damaging grain species which can overcome some obstacles even if extremely highly active insect α-amylase inhibitors were present in feed. However, the sufficient nutrient should be available in feed compounds. Nevertheless, some reduction of insects population can be expected.
    Sztuczne ziarna zrobione z handlowej skrobii pszennej i białkowych inhibitorów α-amylaz wymieszanych w różnych proporcjach oraz czyste ziarno pszenicy stanowiły pokarm wołka zbożowego (Sitophilus granaris L.). Dla larw trojszyka ulca (Trbolium confusum Duv.) i mklika mącznego (Anagasta kuchniella Zell.) te same produkty podawano w postaci sypkiej. Procent przeżywalności chrząszczy wołka zbożowego nie zależał od zawartości białka rozpuszczalnego ani od aktywności amylolitycznej pokarmu. Z drugiej strony ilość pyłu wytworzonego w czasie żerowania (wskaźnik intensywności żerowania) zależał od obecności inhibitorów α-amylazy i trypsyny. Larwy mklika mącznego nie kończyły rozwoju na pokarmie zawierającym 50% skrobii pszennej i 50 inhibitorów α-amylazy. Ten sam pokarm powodował przedłużenie rozwoju larw trojszyka ulca o 15,1 dnia. To świadczy o istnieniu wrodzonego, specyficznego aparatu enzymatycznego w przewodzie pokarmowym testowanych owadów, który może pokonać nawet ekstremalnie wysoką aktywność inhibitorów α-amylazy obecnych w pokarmie. Efektem działania inhibitorów może być tylko redukcja liczebności populacji.
    Źródło:
    Journal of Plant Protection Research; 2001, 41, 3
    1427-4345
    Pojawia się w:
    Journal of Plant Protection Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimal'nye tekhnologicheskie parametry (X1, X2, X3, X4) planetarnojj mashiny dlja izmel'chenija semjannikov baklazhanov pri laboratornykh ispytanijakh
    Optimal technological parameters (X1, X2,X3, X4) planetary machines for crushing seed eggplant in laboratory trials
    Autorzy:
    Dumenko, K.
    Babenko, D.
    Shevchenko, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/77545.pdf
    Data publikacji:
    2013
    Wydawca:
    Komisja Motoryzacji i Energetyki Rolnictwa
    Tematy:
    seed
    crushing
    maceration
    eggplant
    development
    Ukraine
    experimental study
    technological parameter
    optimal parameter
    Opis:
    The paper analyzes the problem of handling seed eggplant seed that has developed in Southern Ukraine. Investigation of the main problems and shortcomings of equipment for the provision of seeds and ways to improve it. A new planetary machine for crushing seed eggplant and a number of experimental studies. Shows the optimal technological parameters of the machine for crushing seed eggplant.
    Źródło:
    Motrol. Motoryzacja i Energetyka Rolnictwa; 2013, 15, 2
    1730-8658
    Pojawia się w:
    Motrol. Motoryzacja i Energetyka Rolnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effects of physical-chemical water parameters on the Nymphaeion alliance development in northwestern Serbia
    Autorzy:
    Dzigurski, D.
    Ljevnaic-Masic, B.
    Nikolic, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/59239.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    physicochemical parameter
    water parameter
    Nymphaeion alliance
    development
    Nymphaeetum albae
    Nymphaeetum albo-luteae stand
    Nymphoidetum peltatae
    Trapetum natantis association
    phytocoenosis
    Serbia
    Opis:
    Nymphaeion alliance vegetation is dominant floating-leaved vegetation in the Danube–Tisza–Danube hydrosystem in northwestern Serbia and comprises Nymphaeetum albae, Nymphaeetum albo-luteae, Nymphoidetum peltatae and Trapetum natantis associations. Comparative analysis of physical-chemical water parameters on localities where these – in most parts of Europe endangered and vulnerable stands – develop showed that most phytocenoses are associated with specific habitat conditions. Of the analyzed water properties, the factors that cause Nymphaeion alliance phytocenoses differentiation are primarily pH, alkalinity and COD-MnO4. Formation of the Nymphaeetum albae stands is significantly associated with the highest values of pH, COD-MnO4 and alkalinity, and the lowest nitrate, nitrite, dissolved and the total phosphorus content values, in comparison to the other studied associations. Nymphoidetum peltatae stands develop in waters characterized by the lowest pH and COD-MnO4, low alkalinity, and the highest nitrate and nitrite values in relation to the other analyzed phytocenoses. Trapetum natantis stands, on the other hand, prefer the warmer sections of the canal network, neutral pH, and the highest values of BOD5, dissolved and total phosphorus. Habitat conditions in which Nymphaeetum albo-luteae stands develop are of the widest range in comparison to other investigated phytocenoses.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2014, 83, 2
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Geometric parameters of the apical meristem and the quality of phyllotactic patterns in Magnolia flowers
    Autorzy:
    Wiss, D.
    Zagorska-Marek, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/56546.pdf
    Data publikacji:
    2012
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    geometrical parameter
    apical meristem
    quality
    phyllotactic pattern
    Magnolia
    flower
    phyllotaxis
    plant development
    primordium
    meristem
    Opis:
    The ratio of primordium size to the meristem size (P/M ratio) is regarded by some geometrical models of phyllotaxis as the parameter, which determines the quality of spiral and whorled patterns of lateral organ arrangement. This assumption was tested on floral meristems in four genets representing four Magnolia taxa: M. × salicifolia, M. stellata, M. denudata and M. acuminata. In successive zones of Magnolia flower, lateral organs are initiated in specific phyllotactic patterns and at specific values of the meristem and primordia sizes. The elements of perianth, usually positioned in three trimerous whorls, are initiated as large primordia on relatively small meristem. The switch in the identity of primordia, from tepals to stamens is accompanied by an abrupt increase in the size of the meristem and decrease in the primordia size. Small values of P/M ratio and frequent occurrence of qualitative transformations of phyllotaxis contribute to the exceptionally rich spectrum of spiral patterns in androecium zone. New spiral patterns emerge when bigger primordia of carpels are initiated on the meristem, which at the same time starts diminishing in size either abruptly (M. × salicifolia, M. stellata, M. acuminata) or slowly (M. denudata). Spiral patterns identified in gynoecia have lower numbers of parastichies than the patterns of androecia and occur in frequencies specific for the genet. Although noted ranges of the meristem and primordia sizes, justify the occurrence of phyllotactic patterns observed in successive zones of Magnolia flower, they do not explain genet-specific frequencies of the patterns observed in gynoecium zone. The lack of straightforward relationship between frequency of the patterns and P/M ratio in gynoecium suggests that more complex geometrical factors or factors of non-geometrical nature are engaged in determination of Magnolia floral phyllotaxis.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2012, 81, 3
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development and growth of Temora longicornis: numerical simulations using laboratory culture data
    Autorzy:
    Dzierzbicka-Glowacka, L.
    Lemieszek, A.
    Zmijewska, I.M.
    Powiązania:
    https://bibliotekanauki.pl/articles/48869.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    development
    growth rate
    numerical simulation
    Temora longicornis
    laboratory culture
    temperature
    food concentration
    duration
    growth parameter
    North Sea
    zooplankton
    diet
    herring
    sprat
    Opis:
    Quantitative expressions are presented to describe the effects of temperature and food concentration on stage duration and growth rate of Temora longicornis for each of the model stage groups (N1–N6 – naupliar stages, C1, C2, C3, C4, C5 –the five copepodid stages). The calculations were made on the basis of experimental data from the literature for T. longicornis from the south-eastern and the southern North Sea. Relationships were obtained between the growth parameters and temperature for the 5–10◦C temperature range and food concentrations from 25 mgC m−3 to excess. Also computed was the total mean development time as a function of the above-mentioned parameters, temperature and food availability. The simulations computed here are similar to the experimental results. The growth rates for successive stages were obtained according to the correction of the ‘Moult Rate’ method, which allows the use of mean weights and stage durations. The calculations also suggest that three complete generations of T. longicornis from the Gdańsk Deep (the southern Baltic Sea) can develop during a single year.
    Źródło:
    Oceanologia; 2011, 53, 1
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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