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    Wyświetlanie 1-8 z 8
    Tytuł:
    Zastosowanie nowoczesnych metod rekultywacji w rejonie kopalni Bilina
    Application of modern restoration methods in the vicinity of Bilina Mines
    Autorzy:
    Safarova, M.
    Rehor, M.
    Lang, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/318616.pdf
    Data publikacji:
    2003
    Wydawca:
    Polskie Towarzystwo Przeróbki Kopalin
    Tematy:
    metody rekultywacji
    kopalnia Bilina
    restoration methods
    Bilina mine
    Opis:
    Zewnętrzne i wewnętrzne zwałowiska kopalni Bilina są ważnymi częściami krajobrazu północnych Czech powstałymi wskutek wydobywania. Zarówno kopalni jak i mieszkańcom regionu zależy na jak najszybszym przygotowaniu tych obszarów i stopniowym integrowaniu ich z ekosystemem regionu. Ten referat krótko podsumowuje wyniki analiz i badań próbek pobranych z nadkładu oraz wewnętrznego zwałowiska w kopalni Bilina i ze zrekultywowanych terenów w miejscowościach Střimice, Radovesice, Pokrok. Wyniki badań wskazują na konieczność zróżnicowanego podejścia do konkretnych zwałowisk w oparciu o wyniki prac badawczych. Tylko w ten sposób można wydzielić zwałowiska do bezpośredniej rekultywacji od tych, które wymagają dodatkowych prac przygotowawczych.
    External and internal dumps of Bilina mine are a significant part of the North - Bohemian landscape sustained by excavation. Here as fast as possible preparation and gradual integration into ecosystem of the area is of interest to the citizens of the Bilina area and the mining company. The paper briefly summarizes the results of tests and evaluation of samples taken from overburden cuts of Bilina mine and on restoration at Střimice, Radovesice, Pokrok and the internal dump at Bílina mine. From the results, it follows the need for a different approach to each site based on consequential analysis of survey works. Only in this way, it is possible to alter the optimal localities for direct restoration from those, requiring just the basic preparation of their top layers.
    Źródło:
    Inżynieria Mineralna; 2003, R. 4, nr 2, 2; 19-27
    1640-4920
    Pojawia się w:
    Inżynieria Mineralna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study on physical-chemical characters and heritability for yield components in rice (Oryza sativa L.)
    Autorzy:
    Ha, P.T.T.
    Khang, D.T.
    Tuyen, P.T.
    Minh, T.N.
    Xuan, T.D.
    Lang, N.T.
    Buu, B.C.
    Powiązania:
    https://bibliotekanauki.pl/articles/11628.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Opis:
    Present study was performed to analysis both physical and chemical properties of rice germplasm and heritability for yield components in combinations. A total of 44 lines/varieties obtained from Cuu Long Rice Research Institute genebank, and 30 F1 generation combinations were evaluated. The results showed that the rice line IR79008-B-11-B-B-1 showed overall good physical characters (head rice, grain length, grain width, chalkiness). In terms of chemical characteristics, three varieties IR75499-73-1-B, OM6162, and OM4900 were found to have good amylose content, gel consistency, protein content, gelatinization temperature, and aroma. A very notable finding was that the cross between OM6162/SwarnaSub1 that low amylose content (20.2%), high gel consistency (78.2 mm), high protein content (8.1%), appropriate gelatinization temperature (scale 5), low chalkiness (level 0), high heritability (0.9) for grain yield trait/cluster, and (0.84) for the number of panicles/cluster. Moreover these characters consist of plant height, panicle length, number of panicles/cluster, number of filled grains/panicle, number of unfilled/panicle, and grain yield/ cluster showed moderate to high heritability of mean for combination OM6162/SwarnaSub1. The results suggest that the grain yield trait/cluster and the number of panicles/cluster are important yield contributing traits to rice breeders for selecting ideal combinations for higher yield and quality of next generations.
    Źródło:
    International Letters of Natural Sciences; 2016, 57
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Involvement of phenolic compounds in anaerobic flooding germination of rice (Oryza sativa L.)
    Autorzy:
    Khang, D.T.
    Ha, P.T.T.
    Lang, N.T.
    Tuyen, P.T.
    Minh, L.T.
    Minh, T.N.
    Bach, D.T.
    Xuan, T.D.
    Powiązania:
    https://bibliotekanauki.pl/articles/11377.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Opis:
    By this study, thirty rice varieties were evaluated for anaerobic flooding tolerance using the direct sowing method. Phenolic profiles of strong and weak tolerant varieties were identified and compared based on HPLC chromatograms. The germination rates and shoot heights of rice were recorded for calculating the seedling vigor, which indicate the tolerant ability of rice in flooding condition. The results revealed a high variation of germination rate (10.01 to 100%), shoot height (0.35 to 78.17 mm) and seedling vigor (0.05 to 72.83). There was a high correlation between (r = 0.71) germination rate in 5 cm and 10 cm flood. Phenolic and flavonoid contents of the strong tolerant cultivar significantly and proportionally increased in the flooding levels (5 cm and 10 cm). There was a total difference in terms of number of phenolic acids found in the strong and weak tolerant varieties. In particular, six phenolic acids (gallic acid, catechol, caffeic acid, syringic acid, vanillin, and ellagic acid) were only identified with high concentration in the strong tolerant cultivar. The findings suggest that the phenolics presented in the strong tolerant varieties probably have a certain function in response and adaptation to anaerobic flooding condition. Further researches on exogenous application of these phenolic acids to increase the flooding tolerant level of rice should be continued at both green house and field treatments.
    Źródło:
    International Letters of Natural Sciences; 2016, 56
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development of new drought tolerant breeding lines for Vietnam using marker-assisted backcrossing
    Autorzy:
    Thu Ha, P.T.
    Khang, D.T.
    Tuyen, P.T.
    Toan, T.B.
    Huong, N.N.
    Lang, N.T.
    Buu, B.C.
    Xuan, T.D.
    Powiązania:
    https://bibliotekanauki.pl/articles/11519.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Źródło:
    International Letters of Natural Sciences; 2016, 59
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Correlation among agro-morphological variation and genetic diversity of rice (Oryza sativa L.) under drought stress
    Autorzy:
    Thu Ha, P.T.
    Khang, D.T.
    Tuyen, P.T.
    Minh, L.T.
    Minh, T.N.
    Thi Lang, N.
    Buu, B.C.
    Xuan, T.D.
    Powiązania:
    https://bibliotekanauki.pl/articles/11160.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Opis:
    In this study, the correlation coefficients among agro-morphological variation, genetic diversity, and drought tolerance in 44 rice cultivars were analyzed. The drought tolerance at seeding stage (DTS) was significantly proportional to drought tolerance at vegetative stage (DTV) (r = 0.60). In addition, DTS and DTV had strong significant positive correlation to leaf roll (r = 0.87 and 0.54, respectively). Means of unfilled grains and tilling per panicle were proportionally correlated to DTS (r = 0.22 and 0.25, respectively), and DTV (r = 0.20 and 0.36, respectively). However, weight of 1000 grains and filled grains were recorded no correlation to DTS and DTV. At a homologous coefficient of 16.85 integrated from cluster analysis of agro-morphological, quantitative characteristics and drought tolerant scores, the rice cultivars were divided into five groups. Maximum polymorphic information content (PIC) values were detected in three markers including RM11125, RM21, and RM5629, which were from 0.78 to 0.79. Cluster analysis of microsatellite markers revealed that by a genetic distance of 0.63, the rice varieties were separated into three clusters. The results provide valuable information for rice breeders to select donors in breeding rice integrated with drought tolerance and good agronomic characteristics.
    Źródło:
    International Letters of Natural Sciences; 2016, 58
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Identifying the grain chalkiness gene using molecular marker techniques in rice (Oryza sativa L.)
    Autorzy:
    Thi Lang, N.
    Ho Truc Giang, P.
    Thi Thu Ha, P.
    Bao Toan, T.
    Anh Phuong, T.
    Chi Buu, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/11679.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Źródło:
    International Letters of Natural Sciences; 2017, 63
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnon and Soliton Excitations in the Carrier-Poor, One-Dimensional S=1/2 Antiferromagnet Yb$\text{}_{4}$As$\text{}_{3}$
    Autorzy:
    Steglich, F.
    Köppen, M.
    Gegenwart, P.
    Cichorek, T.
    Wand, B.
    Lang, M.
    Thalmeier, P.
    Schmidt, B.
    Aoki, H.
    Ochiai, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2011226.pdf
    Data publikacji:
    2000-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.30.Mb
    65.50.+m
    65.70.+y
    Opis:
    The semimetallic quasi-one-dimensional S=1/2 Heisenberg antiferromagnet Yb$\text{}_{4}$As$\text{}_{3}$ was studied by low-temperature measurements of the specific heat C(T,B), thermal expansion α(T,B), and thermal conductivity ĸ(T,B). At finite magnetic fields (B≤12 T) we observed the following distinct anomalies: (1) the magnon contribution to C(T,0), γ T, with large coefficient γ ≈ 200 mJ/(K$\text{}^{2}$mol), becomes strongly reduced with field, and (2) a broad hump in C(T,B=const) is induced at slightly higher temperatures. (3) The latter corresponds to a pronounced peak in α(T,B=const) as well as (4) to a broad minimum in ĸ(T,B= const)/ĸ(T,0). These anomalies are well described by the classical sine-Gordon solution of a one-dimensional Heisenberg antiferromagnet with a weak easy-plane anisotropy. However, the soliton-rest energy deduced from the experimental results depends on the magnetic field like E$\text{}_{S}$ ~ B$\text{}^{ν}$, with an exponent ν ≈ 0.66, while the classical sine-Gordon model requires ν=1. Thus, our results suggest an alternative description of soliton excitations in an antiferromagnetic S=1/2 Heisenberg chain in terms of the quantum sine-Gordon model, for which an exponent ν=2/3 is appropriate.
    Źródło:
    Acta Physica Polonica A; 2000, 97, 1; 91-100
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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