This study focused on the deleterious effect of anthracene (ANT) and role of a surfactant, Triton (TX-100), in recovery from inhibitory effect of ANT. Fast chlorophyll (Chl) fluorescence measurements were performed in wheat plants. Results revealed that maximum quantum yield of PSII, area over the fluorescence curve, performance index (PI), and reaction centre density was negatively affected by ANT treatment. The effects on PSII quantum efficiency, reaction centre density, absorption, and trapping were partially recovered by TX-100. PSII heterogeneity in terms of PSII antenna heterogeneity, corresponding to PSII α, β, and γ centres, and reducing side, corresponding to QB-reducing and QB-nonreducing centres, were also investigated. The damage caused by ANT to PSII antenna heterogeneity was recovered almost by 100% owing to TX-100., C. Sharma, S. Mathur, R. S. Tomar, A. Jajoo., and Obsahuje bibliografii
Both historical and recent developments of quantitative research in linguistics brought out a great amount of data without a unifying method. The older data have been computed mainly by hand from limited samples of shorter texts, with limited possibilities of data combinations. Newer data based on large corpora offer a great number of quantitative characteristics even in the most different combinations, but they have been mainly extracted from heterogeneous text materials. Statistically, the older data can be considered as less exact. New data, with respect to enormous extent of corpora, can be considered as most exact. Therefore, problems arise not only because of the above mentioned methodological disparities of old and new approaches of computation, but also because of different details studied or because of limited possibilities of direct comparison. Deeper statistical and probabilistic questions arise too, and their discussion should not be ignored.