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Wyświetlanie 1-4 z 4
Tytuł:
In situ genetic variability and micropropagation of Cerastium banaticum (Rochel) Heuff. (Caryophyllaceae)– a rare and endemic species from Romania
Autorzy:
Cristea, V.
Besenyei, E.
Jarda, L.
Farkas, A.
Marcu, D.
Clapa, D.
Halmagyi, A.
Butiuc-Keul, A.
Powiązania:
https://bibliotekanauki.pl/articles/2117879.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
acclimatization
biodiversity conservation
plant growth regulators
SSR markers
Opis:
Rare and endemic plant species represent important components of plant biodiversity which require protection to ensure their sustainable conservation. Cerastium banaticum (Rochel) Heuff. is such an endemic and rare species from Romania, for which the genetic variability of two natural populations was studied by SSR markers. Shannon’s information index revealed low levels of genetic diversity in both populations (I = 0.296). As the first attempt in a conservation program a reproducible micropropagation protocol was established starting from seeds, followed by multiplication, rooting, and ex vitro acclimatization. Among the various plant growth regulators tested the highest multiplication coefficient was achieved on a culture medium with 0.5 mg L -1 6-furfurylaminopurine (K) and 1 mg L -1 α-naphthaleneacetic acid (NAA). On this PGRs concentration a number of 26.6 shoots/individual explant with a mean length of 7.9 cm for new generated shoots was registered. The highest number of roots/indi- vidual initiated shoot was 2.6 and it was recorded on a culture medium with 0.5 mg L -1 2-isopentyl-adenine (2iP) and 0.1 mg L -1 NAA. The outdoor acclimatization was successfully performed in a specially designed rocky area in the ‘Alexandru Borza’ Botanical Garden, Cluj-Napoca (Romania).
Źródło:
Acta Biologica Cracoviensia. Series Botanica; 2019, 61, 1; 53-62
0001-5296
Pojawia się w:
Acta Biologica Cracoviensia. Series Botanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rate of humus accumulation on anthropic protosol from the Capus-Cluj District
Autorzy:
Blaga, G
Bunescu, V.
Rauta, C.
Dumitru, M.
Lacatusu, R.
Vidican, R.
Lechintan, T.
Gamet, E.
Clapa, D.
Powiązania:
https://bibliotekanauki.pl/articles/1450112.pdf
Data publikacji:
2001
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
organic matter
surface mining
rock type
accumulation
deposit exploitation
climate
recultivation
soil
humus
soil property
Capos-Cluj District
degraded ecosystem
anthropogenic ecosystem
relief condition
Opis:
The paper presents data on the annual rate of humus accumulation after 10 and 20 years of a strict experimental routine carried out on sterile waste dumps (anthropic protosol) from Cápuş, cultivated with maize, oat and esparcet. Basic dressing applied was the following: V1 - unfertilized, V2- 40 t/ha manure, V3 - 15 t/ha poultry manure, V4 - 40 t/ha manure + N100 P60 K40 , V5 - 15 t/ha poultry manure + N100 P60 K40 , V6 - N100 P60 K0 , V7 - N100 P60 K40, V8 - N200 P120 K80 , V9 - N300 P180 K120. The results obtained revealed that the variant with 40 t/ha manure + N100 P6O K40 (V4) after 10 years accumulated 1.724% humus and after 20 years 4.100% humus. It means that the annual average rate was 0.115% and 0.176%, respectively, at a depth of 0-20 cm. The next variant is the variant with 15 t/ha poultry manure + N100 P60 K40 (V5) where 1.207% of humus was accumulated after 10 years and 3.760% of humus after 20 years; the annual average rate 0.055% and 0.155%, respectively.
Źródło:
Acta Agrophysica; 2001, 51; 15-19
1234-4125
Pojawia się w:
Acta Agrophysica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigations of electron emission from DLC thin films deposited by means of RF PCVD at various self-bias voltages
Autorzy:
Jarzyńska, D.
Znamirowski, Z.
Cłapa, M.
Starga, E.
Powiązania:
https://bibliotekanauki.pl/articles/308665.pdf
Data publikacji:
2007
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
DCL
RF PACVD
Raman spectroscopy
turn-on field
electron emission
effective work function
Opis:
The aim of this paper is to report the results of field emission experiments on undoped, flat diamond-like carbon (DLC) thin films deposited at various self-bias voltages using radio frequency plasma chemical vapor deposition (RF PCVD) technique. It has been observed that the emission properties improve when the absolute value of self-bias voltage becomes higher, e.g., the turn-on field value decreases. The correlation between electron field emission and sp2 content in these films showed improvement of electron emission properties of DLC films for higher amount of sp2 phase.
Źródło:
Journal of Telecommunications and Information Technology; 2007, 3; 39-43
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mechanical properties of a-C:H/Ti layers on prosthodontic CoCr and NiCr alloys
Autorzy:
Szymański, W.
Batory, D.
Cłapa, M.
Klimek, L.
Powiązania:
https://bibliotekanauki.pl/articles/284500.pdf
Data publikacji:
2009
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
carbon layer
corrosion
wear resistance
dental implant
gradient
methalosis
Opis:
Co-Cr and Ni-Cr alloys are widely used in dental implants production. However, there is a risk connected with application of this kind of materials like allergy and methalosis caused by Cr, Ni ions, very dangerous for patients’ health and life. Moreover metal ions released into human body can affect inflammation of the surrounding tissue. Biomaterials’ surface treatment by the deposition of diamond-like carbon films can noticeably improve the corrosion and mechanical features. Widely discussed in world’s literature problems with adhesion of DLC layers can be solved by the deposition of gradient a-C:H/Ti layer. Due to that, it is possible to manufacture thick and well adherent carbon layer on the implant’s surface which will constitute a very good protection against wear and corrosion. Our goal was to evaluate the mechanical properties of a-C:H/Ti layers deposited on CoCr and NiCr alloys in hybrid deposition system RF PACVD/MSand to find the influence of layer thickness on the selected properties. As the result of the investigation it was noticed that deposition of a-C:H/Ti layer improves the mechanical properties of CoCr and NiCr alloys. High hardness and good adhesion of gradient carbon layers makes them a very perspective material for this kind of applications.
Źródło:
Engineering of Biomaterials; 2009, 12, 85; 2-5
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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