Kumari, Pooja Chandran, Preethy Khan, S Sudheer
Published in
Journal of photochemistry and photobiology. B, Biology
The study describes a simple and novel method for the synthesis of silver sulfide nanoparticles (Ag2S NPs). The synthesized NPs were characterized by SEM (scanning electron microscope), XRD (X-ray diffraction), particle size analyzer, zeta sizer and EDX (Energy dispersive X-ray). The Ag2S NPs were spherical in shape with an effective diameter size ...
Schlothauer, Jan C. Hackbarth, Steffen Jäger, Lutz Drobniewski, Kai Patel, Hemantbhai Gorun, Sergiu M. Röder, Beate
Published in
Journal of Biomedical Optics
Singlet oxygen plays a crucial role in photo-dermatology and photodynamic therapy (PDT) of cancer. Its direct observation by measuring the phosphorescence at 1270 nm, however, is still challenging due to the very low emission probability. It is especially challenging for the time-resolved detection of singlet oxygen kinetics in vivo which is of spe...
Ferenc, Peter Solár, Peter Kleban, Ján Mikes, Jaromír Fedorocko, Peter
Published in
Journal of photochemistry and photobiology. B, Biology
Presented experiment considers combination of genistein and photodynamic therapy with hypericin with a view to achieve higher therapeutic outcome in human breast adenocarcinoma cell lines MCF-7 and MDA-MB-231, both identified in our conditions as photodynamic therapy resistant. Since genistein is known to suppress Bcl-2 expression, we predicted tha...
Pandey, Gunjan Fatma, Tasneem Cowsik, Sudha M Komath, Sneha Sudha
Published in
Journal of photochemistry and photobiology. B, Biology
Recent research has shown that, like porphyrins, phycocyanin (PC) too can produce singlet oxygen upon excitation with the appropriate radiation and hence could be useful in photodynamic therapy (PDT) for cancer. Unlike porphyrins, PC has the advantage of being a non-toxic, non-carcinogenic, soluble protein. However, the challenge would be to target...
Li, Na Xu, Han-Hong Liu, Zheng-Yong Yang, Zhuo-Hong
Published in
Journal of photochemistry and photobiology. B, Biology
The synthesis of one pyrethroid insecticide [2-methyl-4-oxo-3-prop-2-yn-1-ylcyclopent-2-en-1-yl-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate (Abbrev. JZ) (Fig. 1)] conjugated with a series of alpha-terthienyl derivatives (2-8) (Fig. 1) by palladium/copper-catalyzed cross-coupling reaction is presented here for evaluating the photoactiv...
Csík, Gabriella Egyeki, Marianna Herényi, Levente Majer, Zsuzsa Tóth, Katalin
Published in
Journal of photochemistry and photobiology. B, Biology
We studied the complexation of meso-tetrakis(4-N-methylpyridyl)porphyrin (TMPyP) with HeLa nucleosomes and compared it to our earlier results on T7 phage nucleoprotein complex (NP) and isolated DNA. To identify binding modes and relative concentrations of the bound TMPyP forms, the porphyrin absorption spectra were analyzed at various base pair/por...
González, Juan A Rosa, Mariana Parrado, María F Hilal, Mirna Prado, Fernando E
Published in
Journal of photochemistry and photobiology. B, Biology
Morphological and physiological responses of seedlings to different solar UV-B irradiances were evaluated in two varieties of quinoa (Chenopodium quinoa Willd.), a crop species from Andean region of South America. Cristalina and Chucapaca varieties were grown at 1965m a.s.l in a glasshouse under natural light conditions for 18 days, and then transf...
Sarkar, Deboleena Mahata, Atanu Das, Paramita Girigoswami, Agnishwar Ghosh, Debanjana Chattopadhyay, Nitin
Published in
Journal of photochemistry and photobiology. B, Biology
Steady state and time resolved fluorometric and circular dichroism (CD) techniques have been exploited to explore the binding interaction of a ketocyanine dye, namely, 2-[3-(N-methyl-N-phenylamino)-2-propenylidene] indanone (MPAPI) with transport proteins, bovine serum albumin (BSA) and human serum albumin (HSA). The emission spectrum of buffered s...
Wang, Hong Gu, Min Cui, Jinxia Shi, Kai Zhou, Yanhong Yu, Jingquan
Published in
Journal of photochemistry and photobiology. B, Biology
Light quality is thought to affect many plant physiological processes during growth and development, particularly photosynthesis. We examined how light quality influences plant photosynthesis by analyzing changes in photosynthetic parameters and expression levels of some photosynthesis related genes of cucumber (Cucumis sativus L. cv. Jinyou No. 1)...
Henry, Brian Foti, Christopher Alsante, Karen
Published in
Journal of photochemistry and photobiology. B, Biology
Photosafety assessments are recommended for all new drug candidates intended for clinical use. In 2002, Testing guidances were issued by the regulatory authorities in the USA (2003) and Europe (2002). A key requirement is to measure the absorption of UV-visible light by a compound in the 290-700 nm range and to assess photostability. Further photos...
