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1

XXX Międzynarodowa Konferencja Polskiego Towarzystwa Fykologicznego "Przeszłość, teraźniejszość, przyszłość badań fykologicznych. Ich znaczenie dla człowieka i ochrony środowiska" (Wrocław, 19–21 Maja 2011)

100%
Lukaszek M.
Wiadomości Botaniczne
|
2011
|
tom 55
|
nr 1-2
2
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Teachers’ expectations regarding the family, the school, the church and the mass media vis-a-vis the prevention of teen motherhood

63%
Lukaszek M., Waz K.
Health Problems of Civilization
|
2019
|
tom 13
|
nr 1
Background. In the recent years, the birth rate among teenage girls has decreased. Although more and more teenagers, especially girls, begin their sexual lives earlier, their knowledge on contraception is usually unsatisfactory and a significant number of adolescents either do not use contraception or use unreliable contraception methods. The lack of sex education at schools leads to teenage students’ lacking knowledge and support in this matter. Material and methods. The tool applied in the research was a previously prepared survey questionnaire entitled Teachers’ and class tutors’ opinions on teen motherhood serving as the research tool. Results. The interviewees are convinced that in order to prevent pregnancies among adolescent girls, teenagers should be treated individually and provided with reliable knowledge and support. On the other hand, the respondents deem recommendable to warn teenagers of negative consequences that having sex brings and of stigmatisation the sexually active and pregnant girls face. Moreover, the interviewed teachers find it appropriate to promote only sympto-thermal contraception methods. Conclusions. The inconsistency and high restrictiveness in teachers’ opinions affect their involvement in teenagers’ sex education and their support towards pregnant students and underage mothers.
3

Development of photosynthetic apparatus in etiolated of pea during greening as influenced by toxic concentration of lead

63%
Poskuta J. W., Lukaszek M.
Acta Physiologiae Plantarum
|
1998
|
tom 20
|
nr 1 suppl.
4

Nowe stanowisko salwinii pływającej Salvinia natans na obszarze Krakowa

63%
Lukaszek M., Kolodziejczyk L. M.
Chrońmy Przyrodę Ojczystą
|
2016
|
tom 72
|
nr 6
5

Chlorophyll a fluorescence kinetics and CO2 exchange rates in light and in darkness in leaves of tall fescue as affected by UV radiation

63%
Lukaszek M., Poskuta J. W.
Acta Physiologiae Plantarum
|
1996
|
tom 18
|
nr 4
6

Development of photosynthetic apparatus and respiration in pea seedlings during greening as influenced by toxic concentration of lead

63%
Lukaszek M., Poskuta J. W.
Acta Physiologiae Plantarum
|
1998
|
tom 20
|
nr 1
Detached leaves of 14 day-old dark-grown pea seedlings were immersed with their cut ends either in water (control) or in 20 mM Pb(NO₃)₂ solution. They were exposed to continuous illumination during 24 and 48 h. The formation of PSII primary photochemistry in thylakoids was determined in vivo by measuring changes in values of parameters of chlorophyll a fast fluorescence kinetics: Fo, Fm, Fv, Fv/Fm and t 1/2. The amount of lead accumulation in leaves, content of chlorophylls and carotenoids and rates of CO₂ uptake in light and evolution in darkness (Pn-net photosynthesis and DR - dark respiration respectively) were determined. It has been found that with the exception of Fo, values of Fv, Fm and Fv/Fm were reduced by Pb²⁺. The values of t 1/2 were significantly larger in Pb²⁺ treated leaves. Decrease in the chlorophyll a fluorescence parameters was paralleled with the strong inhibition by this metal the biosynthesis of chlorophyll a and b but less of the carotenoids. Pb²⁺ drastically reduced Pn but had a stimulatory action on DR after 24 h and small inhibition of DR after 48 h exposure of leaves to this metal. As a consequence, after 48 h of greening the ratio of DR/Pn of control leaves was 0.45 whereas in Pb²⁺ treated leaves 2.7. It is proposed that DR in leaves plays a protective role against damage of Pn by Pb²⁺. Protection can be due to the supply the respiratory derived reductant and ATP to carry out cell metabolism upon reduced photosynthesis.
7
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Content available

Odkrycie nowego heterotroficznego kryptofita - Hemiarma marina

44%
Lukaszek M.
Wszechświat
|
2016
|
tom 117
|
nr 04-06
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