| 1. |
- Zhang, WenJing, et al.
(författare)
-
The effect of ultraviolet radiation on the accumulation of medicinal compounds in plants.
- 2009
-
Ingår i: Fitoterapia. - : Elsevier BV. - 1873-6971 .- 0367-326X. ; 80, s. 207-218
-
Tidskriftsartikel (refereegranskat)abstract
- A review is given of how the production by plants of compounds useful as medicines or raw materials for manufacture of medicines is influenced by ultraviolet radiation, particularly by UV-B radiation (280-315 nm wavelength). The compounds considered in this review are flavonoids and other phenolics, alkaloids (especially indole terpenoid and purine alkaloids), essential oils and other terpenoids, cannabinoids, glucosinolates and isothiocyanates, and compounds having human hormone activity. A short account is also given of ultraviolet signalling in plants. The review concludes with a discussion of the possible evolutionary mechanisms that have lead to the evolution of UV-B regulation of secondary metabolite accumulation.
|
|
| 2. |
- Zhou, Yinhua, et al.
(författare)
-
Inverted and transparent polymer solar cells prepared with vacuum-free processing
- 2009
-
Ingår i: SOLAR ENERGY MATERIALS AND SOLAR CELLS. - : Elsevier BV. - 0927-0248. ; 93:4, s. 497-500
-
Tidskriftsartikel (refereegranskat)abstract
- Inverted transparent polymer solar cells were fabricated by sequentially depositing several organic layers from fluids, on ITO/glass substrates. ITO was used as a cathode to collect electrons. The photovoltage of these diodes can be increased by up to 400 mV by inserting a buffer layer of polyethylene oxide between ITO and the active layers, which results in 4-fold enhancement of power conversion efficiency under the illumination of 100 mW/cm(2) simulated AM1.5 solar light. The enhancement of V., is consistent with the work function change between ITO and ITO/PEO measured by photoelectron spectroscopy. Solar cell production without vacuum processing may lower production costs.
|
|
| 3. |
|
|
| 4. |
|
|
