The ability of various DNA damaging agents to induce asynchronous replication of polyoma DNA (APR) in rat cells carrying integrated copies of these DNA sequences may provide a useful model for understanding mechanisms of gene amplification. The present study has explored in detail the ability of UV irradiation to induce APR in the polyoma transformed rat fibroblast cell line H3. We have found t...

The response of pea (Pisum sativum L., cv. Scinado) plants to low UV-B and UV-C radiation levels was studied in the 2nd leaves in relation to IAA, ABA and ACC contents. Following regimes of UV-B and UV-C radiation were used for 7, 10 or 14 consecutive days: B1 (4.4 kJ m-2 d-1), B2 (13.3 kJ m-2 d-1) and C1 (0.1 kJ m-2 d-1) and C2 (0.3 kJ m-2 d-1). As compared to control, IAA decreased after 10 d...

In this study, we investigated the effects of additional ultraviolet radiation (UV) on main growth fluorescent lamp light pigment content and essential oil accumulation in sweet basil (Ocimum basilicum L.). Three different UV sources from light-emitting diodes discharge lamps, which emit UV-A (315–400 nm), UV-B (280–315 nm) UV-C (100–280 ranges, were tested for plant growing. The plants, growin...

Vacuum UV circular dichroism (CD) spectra were measured down to 175 nm for d(C)10, d(G)10, the d(G)10.d(C)10 duplex, and the d(G)10.d(G)10.d(C)10 triplex. A CD difference spectrum was calculated for d(G)10.d(C)10 giving the change in CD induced by forming the duplex from d(G)10 and d(C)10. The d(G)10.d(G)10.d(C)10 CD difference spectrum gave the CD induced by triplex formation from binding of d...

We present R2PI, IR–UV and UV–UV double resonance measurements of the guanine–cytosine (G–C) dimer formed in a supersonic jet. We show that there is only one isomer of G–C in the investigated wavelength range from 33200 to 34100 cm . We assigned the observed G–C isomer to a specific structure, based on comparisons of the IR spectra of the G and C monomers with the G–C dimer in the range of the ...

The numbers of ultraviolet light (UV)-induced pyrimidine dimers in the DNA of neonatal BALB/c mouse skin were measured by assessing the sensitivity of the DNA to Micrococcus luteus UV endonuclease. Irradiation of neonatal BALB/c mice with FS40 sunlamps caused a dose-dependent induction of endonuclease-sensitive sites (pyrimidine dimers) in DNA extracted from back skin. Exposure of these UV-irra...

Background: Olive mill wastewater (OMW) is characterized by its high organic content and refractory compounds. The aim of this study was to evaluate compare the efficiency UV/O3 UV/ acetylacetone (UV/AcAc) processes for treatment pretreated OMW coagulation/microfiltration (C&M) process. Methods: In study, a laboratory-scale UV plug flow reactor with ancillary equipment fabricated. experimen...

Classification of major secondary metabolite groups is described. A short account is also given to ultraviolet (UV) climatology and UV response in plants. Investigations regarding secondary metabolite production in plants, in vitro cultivated plant cell and tissue cultures under UV radiation, particularly UV-B (280-315 nm) and UV-C (200-280 nm) are reviewed. The capacity of plants, callus and t...