Impact of geochemical composition of diatomaceous earth on its insecticidal activity against adults of <Emphasis Type="Italic">Sitophilus oryzae</Emphasis> (L.) (Coleoptera: Curculionidae)     

Helena Rojht  Aleksander Horvat  Christos G. Athanassiou  Bill J. Vayias  Željko Tomanović  Stanislav Trdan 《Journal of pest science》2010,83(4):429-436

Laboratory experiments were done to determine the effect of geochemical composition of diatomaceous earth (DE) on insecticidal activity of DE against adults of the rice weevil, Sitophilus oryzae (L.) (Coleoptera: Curculionidae). Samples of DE were mined from DE-deposits in Slovenia, Greece, and Serbia. In addition, a commercially available DE formulation (SilicoSec^®) was used in the tests and served as a positive control. The bioassays were carried out at temperatures 20, 25, and 30°C, relative humidity levels of 55 and 75%, and at application rates of 100, 300, 500, and 900 ppm. Adult mortality was recorded after 7, 14, and 21 days of exposure. Prior to bioassays with S. oryzae, the geochemical composition of all DEs that were used in the tests was determined by whole rock ICP geochemical analyses. Silica (in the form of SiO₂ or opal-A) was the DE ingredient that was significantly correlated with efficacy in most of the bioassays. Some weak positive correlation was observed between S. oryzae mortality and MnO or CaO content. All significant correlations between mortality and Al₂O₃, Fe₂O_3, K₂O, TiO₂, Cr₂O₃, P₂O₅, and MgO content were negative, while correlation between Na₂O content and mortality was generally not significant.  相似文献   

Atypical Reactive Center Kunitz-Type Inhibitor from the Sea Anemone Heteractis crispa     

I Gladkikh  M Monastyrnaya  E Leychenko  E Zelepuga  V Chausova  M Isaeva  S Anastyuk  Y Andreev  S Peigneur  J Tytgat  E Kozlovkaya 《Marine drugs》2012,10(7):1545-1565

The primary structure of a new Kunitz-type protease inhibitor InhVJ from the sea anemone Heteractis crispa (Radianthus macrodactylus) was determined by protein sequencing and cDNA cloning. InhVJ amino acid sequence was shown to share high sequence identity (up to 98%) with the other known Kunitz-type sea anemones sequences. It was determined that the P1 Thr at the reactive site resulted in a decrease of the K(i) of InhVJ to trypsin and α-chymotrypsin (7.38 × 10(-8) M and 9.93 × 10(-7) M, respectively). By structure modeling the functional importance of amino acids at the reactive site as well as at the weak contact site were determined. The significant role of Glu45 for the orientation and stabilization of the InhVJ-trypsin complex was elucidated. We can suggest that there has been an adaptive evolution of the P1 residue at the inhibitor reactive site providing specialization or functional diversification of the paralogs. The appearance of a key so-called P1 Thr residue instead of Lys might lead to refinement of inhibitor specificity in the direction of subfamilies of serine proteases. The absence of Kv channel and TRPV1-receptor modulation activity was confirmed by electrophysiological screening tests.  相似文献   

Erratum to Application of Neural Networks and Image Visualization for Early Forecast of Apple Yield     

Rozman ?rtomir  Cvelbar Ur?ka  Tojnko Stanislav  Stajnko Denis  Pa?ek Karmen  Martin Pavlovi?  Vra?ko Marjan 《Erwerbs-Obstbau》2012,69(1):77

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Early response of barley embryos to low- and high-dose gamma irradiation of seeds triggers changes in the transcriptional profile and an increase in hydrogen peroxide content in seedlings     

Polina Yu Volkova  Gustavo T. Duarte  Ludivine Soubigou-Taconnat  Elizaveta A. Kazakova  Stéphanie Pateyron  Vladimir S. Bondarenko  Sofia V. Bitarishvili  Ekaterina S. Makarenko  Roman S. Churyukin  Maria A. Lychenkova  Irina V. Gorbatova  Christian Meyer  Stanislav A. Geras’kin 《Journal of Agronomy and Crop Science》2020,206(2):277-295

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Influence of Carbohydrate Additives on the Growth Rate of Microalgae Biomass with an Increased Carbohydrate Content     

Anna Andreeva  Ekaterina Budenkova  Olga Babich  Stanislav Sukhikh  Vyacheslav Dolganyuk  Philippe Michaud  Svetlana Ivanova 《Marine drugs》2021,19(7)

Our study focused on investigating the possibilities of controlling the accumulation of carbohydrates in certain microalgae species (Arthrospira platensis Gomont, Chlorella vulgaris Beijer, and Dunaliella salina Teod) to determine their potential in biofuel production (biohydrogen). It was found that after the introduction of carbohydrates (0.05 g⋅L⁻¹) into the nutrient medium, the growth rate of the microalgae biomass increased, and the accumulation of carbohydrates reached 41.1%, 47.9%, and 31.7% for Arthrospira platensis, Chlorella vulgaris, and Dunaliella salina, respectively. Chlorella vulgaris had the highest total carbohydrate content (a mixture of glucose, fructose, sucrose, and maltose, 16.97%) among the studied microalgae, while for Arthrospira platensis and Dunaliella salina, the accumulation of total carbohydrates was 9.59% and 8.68%, respectively. Thus, the introduction of carbohydrates into the nutrient medium can stimulate their accumulation in the microalgae biomass, an application of biofuel production (biohydrogen).  相似文献   

Sex chromosome-linked species recognition and evolution of reproductive isolation in flycatchers     

Saether SA  Saetre GP  Borge T  Wiley C  Svedin N  Andersson G  Veen T  Haavie J  Servedio MR  Bures S  Král M  Hjernquist MB  Gustafsson L  Träff J  Qvarnström A 《Science (New York, N.Y.)》2007,318(5847):95-97

Interbreeding between species (hybridization) typically produces unfit offspring. Reduced hybridization should therefore be favored by natural selection. However, this is difficult to accomplish because hybridization also sets the stage for genetic recombination to dissociate species-specific traits from the preferences for them. Here we show that this association is maintained by physical linkage (on the same chromosome) in two hybridizing Ficedula flycatchers. By analyzing the mating patterns of female hybrids and cross-fostered offspring, we demonstrate that species recognition is inherited on the Z chromosome, which is also the known location of species-specific male plumage traits and genes causing low hybrid fitness. Limited recombination on the Z chromosome maintains associations of Z-linked genes despite hybridization, suggesting that the sex chromosomes may be a hotspot for adaptive speciation.  相似文献   

The relationship between rheological characteristics of gluten-free dough and the quality of biologically leavened bread     

Iva Burešová  Stanislav Kráčmar  Petra Dvořáková  Tomáš Středa 《Journal of Cereal Science》2014

The rheological characteristics of gluten-free doughs and their effect on the quality of biologically leavened bread were studied in amaranth, chickpea, corn, millet, quinoa and rice flour. The rheological characteristics (resistance to extension R, extensibility E, R/E modulus, extension area, stress at the moment of dough rupture) were obtained by uniaxial dough deformation. Specific loaf volume of laboratory prepared gluten-free breads was in significant positive correlation with dough resistance (r = 0.86), dough extensibility (r = 0.98) and peak stress at the moment of dough rupture (r = 0.96). Even if the correlation between R/E modulus and the characteristics of loaf quality were not significant, the breads with the highest specific loaf volume were prepared from flours with R/E closer to the wheat check sample (18 N?mm-1). The results showed, in general, good baking flours exhibited stronger resistance to extension and greater extensibility, but differences found were not directly related to the results of baking tests.  相似文献   

Organic matter accumulation by alkaline-constructed soils in heavily metal-polluted area of Subarctic zone     

Slukovskaya  Marina V.  Vasenev  Viacheslav I.  Ivashchenko  Kristina V.  Dolgikh  Andrey V.  Novikov  Andrey I.  Kremenetskaya  Irina P.  Ivanova  Liubov’ A.  Gubin  Stanislav V. 《Journal of Soils and Sediments》2021,21(5):2071-2088

Journal of Soils and Sediments - The research aimed to investigate properties and functions of soils constructed from alkaline mining wastes of different origin to remediate the industrial barren...  相似文献   

Effects of air pollution and climatic factors on Norway spruce forests in the Orlické hory Mts. (Czech Republic), 1979–2014     

Stanislav Vacek  Iva Hůnová  Zdeněk Vacek  Pavla Hejcmanová  Vilém Podrázský  Jan Král  Tereza Putalová  W. Keith Moser 《European Journal of Forest Research》2015,134(6):1127-1142

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Regulation of nitrate uptake at the whole-tree level: interaction between nitrogen compounds, cytokinins and carbon metabolism     

Gessler A  Kopriva S  Rennenberg H 《Tree physiology》2004,24(12):1313-1321

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