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Start Over Coverage 323-328

2. Effect of Glomus mosseae on chlorophyll content, chlorophyll fluorescence parameters, and chloroplast ultrastructure of beach plum (Prunus maritima) under NaCl stress

Creator:
Zai, X. M., Zhu, S. N., Qin, P., Wang, X. Y., Che, L., and Luo, F. X.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
botanika, botany, beach plum, chlorophyll content, chlorophyll fluorescence, chloroplast ultrastructure, Glomus mosseae, NaCl stress, 2, and 58
Language:
Multiple languages
Description:
The present study was undertaken to investigate the effect of Glomus mosseae on chlorophyll (Chl) content, Chl fluorescence parameters and chloroplast ultrastructure of beach plum seedlings under 2% NaCl stress. The results showed that compared to control, both Chl a and Chl b contents of NaCl + G. mosseae treatment were significantly lower during the salt stress, while Chl a/b ratio increased significantly. The increase of minimal fluorescence of darkadapted state (F0), and the decrease of maximal fluorescence of dark-adapted state (Fm) and variable fluorescence (Fv) values were inhibited. The maximum quantum yield of PSII photochemistry (Fv/Fm), the maximum energy transformation potential of PSII photochemistry (Fv/F0) and the effective quantum yield of PSII photochemistry (ΦPSII) increased significantly, especially the latter two variables. The values of the photochemical quenching coefficient (qP) and the nonphotochemical quenching (NPQ) were similar between G. mosseae inoculation and noninoculation. It could be concluded that G. mosseae inoculation could protect the photosystem II (PSII) of beach plum, enhance the efficiency of primary light energy conversion and improve the primitive response of photosynthesis under salinity stress. Meanwhile, G. mosseae inoculation was beneficial to maintain the integrity of thylakoid membrane and to protect the structure and function of chloroplast, which suggested that G. mosseae can alleviate the damage of NaCl stress to chloroplast., X. M. Zai ... [et al.]., and Obsahuje bibliografii
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

3. Netradiční pohled na šíření světla

Creator:
Tyc, Tomáš and Musilová, Jana
Format:
print, bez média, and svazek
Type:
model:article and TEXT
Subject:
šíření světla, light propagation, 6, and 53
Language:
Czech
Description:
Lom, ohyb a odraz světla jsou jevy, s nimiž se potkáváme denně. Pochopit je však nemusí být zejména pro laiky jednoduché, přestože se jedná o téma, které je součástí školní výuky. Zákonitosti šíření světla ovšem plynou velmi jednoduše z několika základních principů optiky a dají se také velice názorně demonstrovat. V tomto příspěvku se jim věnujeme poněkud netradičním způsobem, od výkladu velmi jednoduchého a pochopitelného až po nečekanou aplikaci doládající, že zakřivení trajektorie tělesa v gravitačním poli má vlastně stejný původ jako lom či ohyb světla. and Tomáš Tyc, Jana Musilová.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

4. Optimisation of building structures II (RBSO)

Creator:
Plšek, Jan and Štěpánek, Petr
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
optimization, building, structures, and RBSO
Language:
English
Description:
Reliability-Based Structural Optimisation (RBSO) incorporates probabilistic structural reliability analysis into structural optimisation. A sample definition of an RBSO problem and its solution are presented for the optimisation of an RC cross-section, which is subjected to combinations of normal force and bending moments. The presented RBSO algorithm utilizes the LHS (Latin Hypercube Sampling) approximate simulation method for reliability computations. Numerical results for the particular data set are presented. and Obsahuje seznam literatury
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

5. Pavel Šiffel (1954-2003) or Life full of chlorophyll

Creator:
Květoň, J., Durchan, M., Roháček, K., Šantrůček, J., Vácha, F., and Šesták, Z.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
absorption and excitation fluorescence spectra, chlorophyll biosynthesis, chlorophyll-protein complexes, CO2 deficiency, kinetic spectrophotometer, leaf age, mutants and transformants, photobleaching, photosystem 2, and simulated acid rain
Language:
Multiple languages
Description:
Life and research results of Pavel Siffel, a talented but untimely deceased Czech scientist in photosynthesis, are reviewed. He studied biophysics and physiology of chlorophyll, its complexes with proteins, their absorption and fluorescence spectra, activities in mutants and transformants, dealt with chlorophyll biosynthesis and protochlorophyllide photoreduction, pigments in plants grown at CO2 deficiency and under simulated acid rain, with changes accompanying leaf and plant development, photobleaching, etc. He participated in construction of specialised spectrofluorometers, finally he built the kinetic spectrophotometer SpeKin. and J. Květoň ... [et al.].
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

6. Underlying Lie algebras of quadratic Novikov algebras

Creator:
Chen, Zhiqi
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
Novikov algebra, quadratic Novikov algebra, and underlying Lie algebra
Language:
English
Description:
Novikov algebras were introduced in connection with the Poisson brackets of hydrodynamic type and the Hamiltonian operators in formal variational calculus. In this note we prove that the underlying Lie algebras of quadratic Novikov algebras are 2-step nilpotent. Moreover, we give the classification up to dimension $10$.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public