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Wyświetlanie 1-13 z 13
Tytuł:
Responses of plant species to different aboveground removal treatments with implications for vegetation restoration in the Mu Us Sandland (Inner Mongolia)
Autorzy:
Li, H.
Yi, S.
Lai, L.
Zhou, J.
Sun, Q.
Jiang, L.
Gao, Y.
An, P.
Shimizu, H.
Zheng, Y.
Powiązania:
https://bibliotekanauki.pl/articles/57151.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Botaniczne
Opis:
It is generally assumed that plants can respond to varying degrees of physical damage by growth compensation via resprouting, and resprouting is a key functional trait in many species. Few studies have investigated how grass and shrub species distributed in moving dunes and semifixed dunes in semiarid areas respond to the combined effects of temperature and shoot removal. Medicago sativa, Artemisia ordosica, and Artemisia sphaerocephala plants were grown in a glasshouse for 8 weeks at air temperatures of 10/20°C, 12.5/22.5°C, 15/25°C, and 17.5/27.5°C (night/day) and were subjected to treatments of removing all leaves (LR), removing all leaves followed by cutting at half the plant height (HC), and removing all aboveground tissue (WC). The species, temperature, and damage extent had significant effects on the shoot number, leaf mass ratio, leaf area ratio and ratio of belowground to aboveground dry matter, and the species had a significant effect on the net assimilation rate, specific leaf area, and total biomass. The three species grew well under the HC and LR treatments, and high temperatures (15/25°C and 17.5/27.5°C) significantly promoted the regrowth of the three species. Medicago sativa grew faster than the two Artemisia species. Medicago sativa can be used for fertilizing or vegetation restoration in unimportant conservation areas, and the two Artemisia species can be effectively used for vegetation restoration in the Mu Us Sandland. Due to the low labor costs and the local climate conditions, plants should be clipped before the beginning of the main growing season (end of May or early June) to ensure rapid growth.
Źródło:
Acta Societatis Botanicorum Poloniae; 2019, 88, 1
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Morphometrical and ecological analysis of nematodes of the family Capillariidae (Neveu-Lemaire, 1936) in wild ducks (Anatinae) from the north-western Poland
Autorzy:
Stapf, A.N.
Kavetska, K.M.
Ptak, P.P.
Rzad, I.
Powiązania:
https://bibliotekanauki.pl/articles/5708.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
morphometric analysis
ecological analysis
nematode
Capillariidae
Capillaria anatis
Eucoleus contortus
Pseudocapillaria mergi
wild duck
Anatinae
ecology
Polska
Źródło:
Annals of Parasitology; 2013, 59, 4
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of the effect of planting distance and harvesting time on the carotenoids and phytochemicals of selected orange-fleshed sweet potato varieties
Autorzy:
Kalu, O.O.
Ojimelukwe, P.C.
Ukom, A.N.
Powiązania:
https://bibliotekanauki.pl/articles/11369.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Źródło:
International Letters of Natural Sciences; 2017, 66
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Salvinialean megaspores in the Late Cretaceous of southern Patagonia, Argentina
Autorzy:
Santamarina, P.E.
Barreda, V.D.
Iglesias, A.
Varela, A.N.
Powiązania:
https://bibliotekanauki.pl/articles/21754.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Opis:
We report here two megaspores species related to the aquatic ferns of the order Salviniales from the Late Cretaceous Mata Amarilla Formation (Austral Basin), southern Santa Cruz Province, Argentina. We identified the species Arcellites disciformis and Balmeisporites cf. B. holodictyus. The presence of A. disciformis, in particular, is significant not only because it represents the first record for the Southern Hemisphere, indicating a bi-hemispheric distribution for the species, but also because it increases the diversity of this genus in Patagonia. The new findings of salvinialean megaspores highlight the importance of water ferns in the Late Cretaceous aquiferous enviroments of southern South America. The common occurrences of Arcellites and Balmeisporites, whether in shallow, fresh or brackish water facies, indicates aquatic paleoenvironment of the Mata Amarilla Formation, as was inferred also from the sedimentological evidence. Their presence also indicates that the lower and middle levels of the Mata Amarilla Formation can be attributed to the megaspore Zone M3 (Albian–Cenomanian) defined for the Cretaceous of Patagonia.
Źródło:
Acta Palaeontologica Polonica; 2018, 63, 3
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
STM Study on the (100) Surface of the Ag-In-Yb 1/1 Cubic Approximant
Autorzy:
Cui, C.
Sharma, H.
Nugent, P.
Shimoda, M.
Pang Tsai, An
Powiązania:
https://bibliotekanauki.pl/articles/1373497.pdf
Data publikacji:
2014-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.44.Br
68.35.B-
68.37.Ef
Opis:
Scanning tunneling microscopy studies have revealed a periodic step-terrace structure in the (100) surface of the Ag-In-Yb 1/1 cubic approximant. The step height between the large terraces is about 0.73 nm, approximately one-half of the lattice constant, which is consistent with the bcc-like crystalline structure of this crystal. Two small terraces are observed between the adjacent large terraces. High-resolution STM images of the large terrace exhibit a square lattice of protrusions with a lattice constant of about 1.55 nm, which is consistent with the bulk lattice constant. The scanning tunneling microscopy results suggest that the large terraces are associated with the planes that intersect the centers of rhombic triacontrahedral clusters (the building unit of the crystal) and show the highest atomic density along the [100] axis. It is highly likely that the small terraces are related to moderate atomic density planes and are less stable than the large terraces.
Źródło:
Acta Physica Polonica A; 2014, 126, 2; 577-580
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
High-temperature instability processes in SOI structures and MOSFETs
Autorzy:
Nazarov, A.N.
Kilchytska, V.I.
Vovk, Ja.N.
Colinge, J.P.
Powiązania:
https://bibliotekanauki.pl/articles/307654.pdf
Data publikacji:
2001
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
SOI
MOSFET
high-temperature
instability
ZMR
SIMOX
Opis:
The paper reviews the problems related to BOX high-temperature instability in SOI structures and MOSFETs. The methods of bias-temperature research applied to SOI structures and SOI MOSFETs are analysed and the results of combined electrical studies of ZMR, and SIMOX SOI structures are presented. The studies are focused mainly on electrical discharging processes in the BOX at high temperature and its link with new instability phenomena such as high-temperature kink effects in SOI MOSFETs.
Źródło:
Journal of Telecommunications and Information Technology; 2001, 1; 18-26
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Unravelling the Effect of Anthraquinone Metal Salts as Wide-range Plateau Catalysts to Enhance the Combustion Properties of Solid Propellants
Autorzy:
Wang, Y.
Yan, Q.-L.
An, T.
Chen, B.
Ji, Y.-P.
Wang, W.
Zhao, F.
Powiązania:
https://bibliotekanauki.pl/articles/358042.pdf
Data publikacji:
2018
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
solid propellants
burning rate catalysts
anthraquinone metal salts
wide-range plateau combustion
Opis:
Novel lead and copper salts based on anthraquinone, including 1,8-dihydroxyanthraquinone,1,4,5,8-tetrahydroxyanthraquinone and 1,8-dihydroxy-4,5-dinitroanthraquinone, were prepared and characterized by Fourier transform infrared spectroscopy (FTIR), elemental analysis (EA), and X-ray fluorescence (XRF). The catalytic effects of these compounds on the decomposition of nitrocellulose (NC) and on the combustion properties of double-base (DB) and composite modified double-base (CMDB) propellants were comprehensively investigated. The results demonstrated that the burning rate is significantly increased (by 200%) in the lower pressure range (2-6 MPa) as compared to the control systems without added anthraquinone-based salts. Concurrently, the pressure exponents (n) were obviously lower, exhibiting a “wide-range plateau” combustion phenomenon in the middle-pressure region. Specifically, for the DB propellants such a plateau region extended from 10 MPa to 16 MPa for n equal to 0.10, from 10 MPa to 18 MPa for n equal to 0.11 and from 8 MPa to 18 MPa when n is 0.05. In the case of RDX-CMDB propellants, the plateau was found to be in the range 6-18 MPa, with n in the range 0.16-0.27, depending on the type of catalyst, in contrast to the reference CMDB sample, which was characterized by n equal to 0.7 for the same pressure range.
Źródło:
Central European Journal of Energetic Materials; 2018, 15, 2; 376-390
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synergy among oxcarbazepine, pregabalin and topiramate in the mouse maximal electroshockinduced seizure test – an isobolographic analysis
Autorzy:
Zaluska, K.
Panasiuk-Poterek, A.N.
Kondrad-Wrobel, M.W.
Marzeda, P.
Walczak, A.
Gut-Lepiech, A.
Wroblewska-Luczka, P.
Luszczki, J.J.
Powiązania:
https://bibliotekanauki.pl/articles/3409.pdf
Data publikacji:
2018
Wydawca:
Instytut Medycyny Wsi
Źródło:
Journal of Pre-Clinical and Clinical Research; 2018, 12, 4
1898-2395
Pojawia się w:
Journal of Pre-Clinical and Clinical Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cyclic movement execution and its influence on motor programmess
Autorzy:
Dornowski, M.
Gorkovenko, A.
Tomiak, T.
Mishchenko, V.S.
Wilczyńska, D.
Olszewski, H.
Sawicki, P.
Talnov, A.N.
Powiązania:
https://bibliotekanauki.pl/articles/2083070.pdf
Data publikacji:
2019
Wydawca:
Instytut Medycyny Wsi
Tematy:
locomotion
mechanics
water sport
environment
rural and urban areas
Opis:
Objectives. The aim of this study was to discover the relationship between the performance of different mechanical movements of rowers, and define its effect on the motor programs of the cyclic movement in athletes living in rural and urban areas. Materials and method. Twenty-two male rowers participated in the experiment using a rowing ergometer (Concept2, USA). The experiment consisted of 3 tests examining the maximal power of the pull-ups (MPbpu). The movement mechanogram was registered with a specialized complex Noraxon’s 3D MyoMotion (Noraxon Inc., USA). The software of the complex allowed calculation of the values of the joint angles from the accelerometer data. The Origin Lab 8.5 program was used for the mathematical and statistical processing of the signals from the mechanograms. Results. It was found that all experiment participants had a stepped controlled increase in the power of single bar pull-ups leading to a corresponding proportional increase in the frequency of rowing – test 1 and, conversely, a stepped controlled increase in the rowing frequency accompanied by a proportional increase in the power of the bar pull-ups – test 2. The involuntary dependence of the power and the rate was due to the peculiarities of the central cyclic movement programming, according to which the forces and durations of the active and passive bar pull-ups phases were interconnected and regulated together. The voluntary power-rate dependence control led to the breakdown of these links in the motor program of cyclic movements and to the separate control of these parameters. Conclusions. Motor programs in cyclic movement may be created in the same pattern in tope level sport and recreation, as well in different environmental conditions – gym halls (movement simulators), professional and recreational water sport tracks.
Źródło:
Annals of Agricultural and Environmental Medicine; 2019, 26, 2; 361-368
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Antagonistic interaction of lacosamide with carbamazepine and valproate in the mouse tonic-clonic seizure model
Antagonistyczna interakcja lakozamidu z karbamazepiną i walproainianem w modelu drgawek toniczno-klonicznych u myszy
Autorzy:
Kondrat-Wróbel, M.W.
Załuska, K.
Walczak, A.
Panasiuk-Poterek, A.N.
Gut-Lepiech, A.
Wróblewska-Łuczka, P.
Łuszczki, J.J.
Powiązania:
https://bibliotekanauki.pl/articles/2053463.pdf
Data publikacji:
2019
Wydawca:
Akademia Bialska Nauk Stosowanych im. Jana Pawła II w Białej Podlaskiej
Tematy:
antiepileptic drugs
isobolography
maximal electroshock
three-drug combination
antagonism
leki przeciwpadaczkowe
izobolografia
elektrowstrząsy
kombinacja trzech leków
antagonizm
Opis:
Background. It is estimated that approximately 1% of people worldwide suffer from epilepsy. Currently available antiepileptic drugs (AEDs) are able to control epileptic seizures in about 70% of cases. In the remaining patients (30%), the application of two or three AEDs in combination is necessary for effective seizure management. The goal of this work was to characterize the interaction of three AEDs: lacosamide (LCM), carbamazepine (CBZ) and valproate (VPA) at the fixed-ratio of 1:1:1 in the mouse tonic-clonic seizure model. Material and methods. Male albino Swiss mice, after receiving a combination of LCM, CBZ and VPA, were challenged with electric current to evoke tonic hind limb extension (seizure activity). Protection of the mice from tonic-clonic seizures was assessed by isobolographic analysis to determine the type of interaction occurring between these drugs. Results. Type I isobolographic analysis revealed that the combination of LCM, CBZ and VPA produced infra-additive (antagonistic) interaction in the mouse tonic-clonic seizure model. Conclusions. Since the three-drug mixture of LCM, CBZ a nd VPA exerted an antagonistic interaction in the tonic-clonic seizure test in mice, we would caution physicians against treating epilepsy patients with this unfavorable combination.
Wprowadzenie. Szacuje się, że około 1% osób na całym świecie cierpi na padaczkę. Obecnie dostępne leki przeciwpadaczkowe pozwalają na opanowanie napadów padaczkowych w około 70% przypadków. U pozostałych pacjentów z padaczką (30%) konieczne jest zastosowanie dwóch lub trzech leków przeciwpadaczkowych w kombinacji. Celem pracy było scharakteryzowanie interakcji między trzema lekami przeciwpadaczkowymi: lakozamidem (LCM), karbamazepiną (CBZ) i walproinianem (VPA) w stałym stosunku dawek 1:1:1 w modelu drgawek toniczno-klonicznych u myszy. Materiał i metody. Samce myszy albino Swiss, po otrzymaniu kombinacji LCM, CBZ i VPA, poddano działaniu prądu elektrycznego, aby wywołać toniczny wyprost kończyn tylnych (aktywność drgawkową). Ochronę myszy przed napadami toniczno-klonicznymi oszacowano za pomocą analizy izobolograficznej, aby określić typ interakcji zachodzącej między tymi lekami. Wyniki. Analiza izobolograficzna typu I ujawniła, że kombinacja LCM, CBZ i VPA powodowała oddziaływanie infra-addytywne (antagonistyczne) w modelu drgawek toniczno-klonicznych u myszy. Wnioski. Ponieważ trójlekowa mieszanina LCM, CBZ i VPA wywierała antagonistyczną interakcję w teście napadów toniczno-klonicznych u myszy, specjalne ostrzeżenie jest konieczne dla lekarzy, aby nie leczyć pacjentów z padaczką tą niekorzystną kombinacją.
Źródło:
Health Problems of Civilization; 2019, 13, 1; 92-98
2353-6942
2354-0265
Pojawia się w:
Health Problems of Civilization
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
First record of a chalicothere from the Miocene of Myanmar
Autorzy:
Chavasseau, O.
Chaimanee, Y.
Coster, P.
Emonet, E.-G.
Soe, A.N.
Kyaw, A.A.
Maung, A.
Rugbumrung, M.
Shwe, H.
Jaeger, J.-J.
Powiązania:
https://bibliotekanauki.pl/articles/20027.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
first record
chalicothere
mammal
Mammalia
Perissodactyla
Chalicotheriidae
Chalicotheriinae
Khoratpithecus
paleoenvironment
Miocene
Myanmar
Opis:
Here we describe the first record of a chalicothere from the Miocene of Myanmar. The chalicothere, documented by a partial mandible, was unearthed from the lower portion of the Irrawaddy Formation in the region of Magway, Central Myanmar. The Burmese material belongs to an early late Miocene fauna which recently yielded hominoid remains attributed to Khoratpithecus. The specimen, which is attributed to a chalicotheriine, does not reliably match with any described Miocene Eurasian species of this subfamily, suggesting the possibility it belongs to a new taxon. The discovery of a chalicotheriine in the surroundings of Magway contributes to the hypothesis that closed habitats were an important component of the paleoenvironment of Khoratpithecus.
Źródło:
Acta Palaeontologica Polonica; 2010, 55, 1
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Bending, Impact Fracture Behavior and Characteristics of Stainless Steel Clad Plates with Different Rolling Temperature
Autorzy:
An, Q.
Fan, K. Y.
Ge, Y. F.
Liu, B. X.
He, J.
Wang, S.
Chen, C. X.
Ji, P. G.
Tolochko, O.
Powiązania:
https://bibliotekanauki.pl/articles/2049433.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
stainless steel clad plate
interface characteristics
bending behavior
impact morphologies
delamination crack
Opis:
The interface characteristics, bending and impact behavior, as well as fracture characteristics of stainless steel clad plates fabricated by vacuum hot rolling at different rolling temperatures of 1100°C, 1200°C and 1300°C are investigated in detail. The interface bonding strength is gradually increased with the increasing rolling temperature due to the sufficient diffusion behavior of alloy element. The bending toughness and impact toughness are gradually decreased, while the bending strength increase with the increase of the rolling temperature, which is attributed to mechanisms of matrix softening and interface strengthening at high rolling temperature. Due to the weak interface at 1100°C, the bending and impact crack propagation path was displaced by delamination cracks, which in turn lead to reduction in stress intensity of the main crack, playing an effective role in toughening the stainless steel clad plates. Moreover, the impact fracture morphologies of clad plates show a typical ductile-brittle transition phenomenon, which is attributed to the matrix softening behavior with the increasing rolling temperature.
Źródło:
Archives of Metallurgy and Materials; 2021, 66, 1; 229-239
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
GAMMA-induced sensibilization of lasing properties of Y[3]AL[5]O[12] single crystals doped with Er[3+]ions
Autorzy:
Kaczmarek, Sławomir.
Matkovskij, A.O.
Sugak, D.YU.
Durygin, A.N.
Kopczyński, Krzysztof.
Mierczyk, Zygmunt (1956- ).
Frukacz, Zygmunt.
Łukasiewicz, Tadeusz.
Šachov, A.P.
Powiązania:
Biuletyn Wojskowej Akademii Technicznej 1996, nr 8, s. 85-91
Data publikacji:
1996
Tematy:
Promieniowanie
Krystalografia
Monokryształy
Opis:
Rys.; Wpływ promieniowania gamma na optyczne i laserowe własności monokryształów Y[3]Al[5]O[12] domieszkowych jonami Er[3+]; bibliogr.; Abstr., Rez., streszcz.
Dostawca treści:
Bibliografia CBW
Artykuł
    Wyświetlanie 1-13 z 13

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