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Start Over Coverage 189-198

2. On the uniqueness of positive solutions for two-point boundary value problems of Emden-Fowler differential equations

Creator:
Tanaka, Satoshi
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
uniqueness, positive solution, two-point boundary value problem, and Emden-Fowler equation
Language:
English
Description:
The two-point boundary value problem u ′′ + h(x)u p = 0, a < x < b, u(a) = u(b) = 0 is considered, where p > 1, h ∈ C 1 [0, 1] and h(x) > 0 for a ≤ x ≤ b. The existence of positive solutions is well-known. Several sufficient conditions have been obtained for the uniqueness of positive solutions. On the other hand, a non-uniqueness example was given by Moore and Nehari in 1959. In this paper, new uniqueness results are presented.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

3. Stomatal development and associated photosynthetic performance of capsicum in response to differential light availabilities

Creator:
Fu, Q. S., Zhao, B., Wang, Y. J., Ren, S., and Guo, Y. D.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
botanika, botany, capsicum, chloroplast, low light, photosynthesis, Rubisco, and stomata
Language:
Multiple languages
Description:
The mechanisms of capsicum growth in response to differential light availabilities are still not well elucidated. Hereby, we analyzed differential light availabilities on the relationship between stomatal characters and leaf growth, as well as photosynthetic performance. We used either 450-500 µmol m-2 s-1 as high light (HL) or 80-100 µmol m-2 s-1 as low light (LL) as treatments for two different cultivars. Our results showed that the stomatal density (SD) and stomatal index (SI) increased along with the leaf area expansion until the peak of the correlation curve, and then decreased. SD and SI were lower under the LL condition after three days of leaf expansion. For both cultivars, downregulation of photosynthesis and electron transport components was observed in LL-grown plants as indicated by lower light- and CO2-saturated photosynthetic rate (Pmax and RuBPmax), quantum efficiency of photosystem II (PSII) photochemistry (ΦPSII), electron transport rate (ETR) and photochemical quenching of fluorescence (qp). The observed inhibition of the photosynthesis could be explained by the decrease of SD, SI, Rubisco content and by the changes of the chloroplast. The low light resulted in lower total biomass, root/shoot ratio, and the thickness of the leaf decreased. However, the specific leaf area (SLA) and the content of leaf pigments were higher in LL-treatment. Variations in the photosynthetic characteristics of capsicum grown under different light conditions reflected the physiological adaptations to the changing light environments. and Q. S. Fu ... [et al.].
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public