Sediment load variability in response to climate and land use changes in a Carpathian catchment (Raba River,Poland)     

Szalińska  Ewa  Orlińska-Woźniak  Paulina  Wilk  Paweł 《Journal of Soils and Sediments》2020,20(6):2641-2652

Journal of Soils and Sediments - This study analyzes the variability of sediment loads under variant climate change and land use scenarios in a Carpathian catchment with a dam reservoir. The areas...  相似文献   

Desiccation tolerance and cryopreservation of seeds of black poplar (Populus nigra L.), a disappearing tree species in Europe     

Marcin Michalak  Beata P. Plitta  Tadeusz Tylkowski  Paweł Chmielarz  Jan Suszka 《European Journal of Forest Research》2015,134(1):53-60

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Plant P5C reductase as a new target for aminomethylenebisphosphonates     

Forlani G  Giberti S  Berlicki L  Petrollino D  Kafarski P 《Journal of agricultural and food chemistry》2007,55(11):4340-4347

A series of N-substituted derivatives of aminomethylenebisphosphonic acid were evaluated as potential inhibitors of delta1-pyrroline-5-carboxylate reductase (EC 1.5.1.2), the enzyme that catalyzes the last step in proline biosynthesis, partially purified from Arabidopsis thaliana suspension cultured cells. At millimolar concentrations, three compounds out of 26 were found to interfere with the catalytic mechanism. One of them, namely, 3,5-dichloropyridyl-aminomethylenebisphosphonic acid, retained such inhibitory activity in the micromolar range. Kinetic analyses ruled out the possibility that the inhibition could simply rely upon the chelating properties of bisphosphonates and showed mechanisms of a noncompetitive type against NADH and an uncompetitive type against delta1-pyrroline-5-carboxylic acid, with KI values of 199 +/- 6 and 10.3 +/- 1.5 microM, respectively. A computer-aided docking analysis, performed on the basis of the crystal structure of the enzyme from Streptococcus pyogenes, suggested that this phosphonate may interact with amino acid residues near the binding site of delta1-pyrroline-5-carboxylic acid, thus blocking the substrate in a pocket and preventing its interaction with NADH. Because in higher plants the step catalyzed by delta1-pyrroline-5-carboxylate reductase is shared by all pathways leading to proline synthesis, such a compound may represent a lead structure to be exploited for the design of new substances endowed with herbicidal activity.  相似文献   

Pyramiding genes affecting sprouting resistance in Rye by means of marker assisted selection     

Marta?Twardowska  Piotr?Masoj?Email author  Pawe??Milczarski 《Euphytica》2005,143(3):257-260

The 541 × Ot1-3 intercross population and bulked segregant analysis (BSA) were used to search for molecular markers linked to genes underlying sprouting and alpha-amylase activity. Six RAPD markers showing association with studied traits were tested for their potential effectiveness in selecting sprouting resistant genotypes. It was shown that although individual effects of markers were not high, their accumulation in one genotype gives substantial increase in sprouting resistance.  相似文献   

Determination of the equation of state of dense matter     

Danielewicz P  Lacey R  Lynch WG 《Science (New York, N.Y.)》2002,298(5598):1592-1596

Nuclear collisions can compress nuclear matter to densities achieved within neutron stars and within core-collapse supernovae. These dense states of matter exist momentarily before expanding. We analyzed the flow of matter to extract pressures in excess of 10(34) pascals, the highest recorded under laboratory-controlled conditions. Using these analyses, we rule out strongly repulsive nuclear equations of state from relativistic mean field theory and weakly repulsive equations of state with phase transitions at densities less than three times that of stable nuclei, but not equations of state softened at higher densities because of a transformation to quark matter.  相似文献   

Thermally initiated solvent-free radical modification of beech (Fagus sylvatica) wood     

Mariusz Ł. Mamiński  Magdalena Król  Armando G. McDonald  David N. McIlroy  Ishwar B. Niraula  Joanna Czechowska  Paweł Parzuchowski 《Wood Science and Technology》2013,47(5):1019-1031

A procedure for rapidly modifying beech wood using a thermally initiated solvent-free grafting system was examined. In the modification, butyl acrylate and butyl methacrylate were used as vinyl monomers. Free radicals were generated from 2,2′-azobis(2-methylpropionitrile) or benzoyl peroxide at 103 and 180 °C by contact heating of the modified material. Chemical changes in the material were investigated by FTIR and X-ray photoelectron spectroscopies. The modification resulted in decreased surface wetting of the material manifested by increased water contact angles. The hardness of the resultant material decreased, while its color changed by the effect of temperature. It was shown that the approach allowed for efficient thermal-initiated modification of wood with rapid contact heating.  相似文献   

Movement patterns of an avian generalist predator indicate functional heterogeneity in agricultural landscape     

Väli  Ülo  Mirski  Paweł  Sein  Gunnar  Abel  Urmas  Tõnisalu  Grete  Sellis  Urmas 《Landscape Ecology》2020,35(7):1667-1681

Landscape Ecology - Biodiversity is closely related to landscape heterogeneity, but both are difficult to evaluate directly. Apex predators, such as raptors, are potential surrogate indicators of...  相似文献   

Occurrence of reproductive disorders in pig herds with and without Chlamydia suis infection – statistical analysis of breeding parameters          下载免费PDF全文

Krzysztof Rypuła  Aleksandra Kumala  Katarzyna Płoneczka‐Janeczko  Paweł Lis  Ewa Karuga‐Kuźniewska  Krzysztof Dudek  Ireneusz Całkosiński  Patrycja Kuźnik  Paweł Chorbiński 《Animal Science Journal》2018,89(5):817-824

Chlamydiae are frequently encountered Gram‐negative intracellular eubacteria that can cause clear manifestations or clinically asymptomatic disorders. C. suis and other chlamydia are primarily isolated in cases of reproductive disorders. This study was performed to estimate the impact of Chlamydia suis infection on reproduction in sows by analyzing reproduction rates and breeding parameters. The test was conducted on first generation (F1) pigs from Polish Landrace (PL) × Polish Large White (PLW). Sixty‐four herds were investigated and 500 vaginal swabs were collected. Isolation of DNA was carried out directly from the swabs. All samples were analyzed for Chlamydia suis by real‐time PCR with a locked nucleic acid (LNA)‐containing probe. To analyze the impact of chlamydia infection on reproductive parameters, evaluation questionnaires were used. Reproductive problems were found in 77.3% of the farms tested. The receiver operating characteristic curve indicated that in the farms with 10 up to 120 sows, there were higher reproductive problems with chlamydia infection than in smaller and bigger pig farms. The most common problems were estrus repetition, which was reported by 57.81% of the surveyed farms, and the birth of dead piglets, which was reported by 31.25% of the investigated pig farms. Abortions, which were reported by 28.12% of the surveyed farms, were the least common reproductive disorders.  相似文献   

Measures for interoperability of phenotypic data: minimum information requirements and formatting     

Hanna??wiek-Kupczyńska  Thomas?Altmann  Daniel?Arend  Elizabeth?Arnaud  Dijun?Chen  Guillaume?Cornut  Fabio?Fiorani  Wojciech?Frohmberg  Astrid?Junker  Christian?Klukas  Matthias?Lange  Cezary?Mazurek  Anahita?Nafissi  Pascal?Neveu  Jan?van?Oeveren  Cyril?Pommier  Hendrik?Poorter  Philippe?Rocca-Serra  Susanna-Assunta?Sansone  Uwe?Scholz  Marco?van?Schriek  ümit?Seren  Bj?rn?Usadel  Stephan?Weise  Paul?Kersey  Pawe??KrajewskiEmail author 《Plant methods》2016,12(1):44

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The impact of restoration processes on the selected soil properties and organic matter transformation of mountain fens under <Emphasis Type="Italic">Caltho-Alnetum</Emphasis> community in the Babiogórski National Park in Outer Flysch Carpathians,Poland     

Paweł Nicia  Romualda Bejger  Paweł Zadrożny  Maria Sterzyńska 《Journal of Soils and Sediments》2018,18(8):2770-2776

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