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1,718 Newest Publications in photochemical & photobiological sciences

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Solar UV radiation and microbial life in the atmosphere

03-Jul-2018 | Sasha Madronich; Lars Olof Björn; Richard Lloyd McKenzie, Photochemical & Photobiological Sciences, 2018

Many microorganisms are alive while suspended in the atmosphere, and some seem to be metabolically active during their time there. One of the most important factors threatening their life and activity is solar ultraviolet (UV) radiation. Quantitative understanding of the spatial and temporal ...

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Visualization of Nonemissive Triplet Species of Zn(II) Porphyrins through Cu(II) Porphyrin Emission via the Reservoir Mechanism in a Porphyrin Macroring

27-Jun-2018 | Yusuke Kuramochi; Sho Hashimoto; Yuki Kawakami; Motoko Asano; Akiharu Satake, Photochemical & Photobiological Sciences, 2018

A macroring composed of three Cu(II) porphyrins (CuP) and three slipped-cofacial Zn(II) porphyrin dimers (ZnP2) exhibited near-IR emission from the CuP part. The emission lifetime of the macroring (15 μs) was 500 times longer compared to that of a Cu porphyrin monomer (e.g., Cu(II)TPP; TPP = ...

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Photoperiodic control of GnRH-I expression in seasonal reproduction of the Eurasian tree sparrow

26-Jun-2018 | Anand S. Dixit; Sanborlang Byrsat, Photochemical & Photobiological Sciences, 2018

Day length has been shown to be a major source of temporal information regulating seasonal reproduction in the Eurasian tree sparrow (Passer montanus). The present study aims to investigate the photoperiodic expression of gonadotropin-releasing hormone-I (GnRH-I), and how it mediates seasonal ...

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Intramolecular electron transfer of the light harvesting perylene-pyrene supramolecular conjugate

26-Jun-2018 | Mohamed El-saeyd El-khouly; Ahmed El-Refaey; Shaban Shaban; Morad El-Hendawy, Photochemical & Photobiological Sciences, 2018

Electronic interaction between the cationic N,N′-bis(2(trimethylammonium iodide) ethylene)perylene-3,4,9,10-tetracarboxyldiimide (TAIPDI) with two electron donors, namely, pyrene (Py) and 1-pyrenesulfonic acid sodium salt (PySA) have been investigated. The spectroscopic studies showed the ...

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Naked-eye fluorescent sensor for copper (II) ion based on naphthalene conjugate BODIPY dye

20-Jun-2018 | Ahmed Nuri Kursunlu; Canan Baslak, Photochemical & Photobiological Sciences, 2018

A novel naphthalene-Bodipy dye (N-Bodipy) was designed, prepared and characterized. N-Bodipy showed a selective and sensitive recognition toward Cu (II) ion as a fluorescent antenna group in acetonitrile/water over other metal cations. The complexation between Cu (II) ion and N-Bodipy gave a ...

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Hydrothermal synthesis of Bi2WO6 with a new tungsten source and enhanced photocatalytic activity of Bi2WO6 hybridized with C3N4

20-Jun-2018 | Di Li; Peipei Yan; Xinguo Ma; Juanqin Xue; Yujie Zhang; Manbo Liu, Photochemical & Photobiological Sciences, 2018

Bi2WO6 nanosheets were synthesized by a hydrothermal method with H2WO4 for the first time. The band structure of Bi2WO6 was investigated on the basis of density functional theory calculations. Bi2WO6 photocatalysts showed photocatalytic activity for the degradation of methylene blue under visible ...

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Using X-ray in photodynamic therapy: an overview

20-Jun-2018 | Ludivine Larue; Amina Ben Mihoub; Zahraa Youssef; Ludovic Colombeau; Samir Acherar; Jean-Claude André; Pilippe ..., Photochemical & Photobiological Sciences, 2018

Photodynamic therapy is a therapeutic option to treat cancer and others diseases. PDT is used everyday in dermatology and recent developments in the treatment of glioblastoma, mesothelioma or prostate prove the efficacy of this modality. In order to improve the efficacy of PDT, different ...

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The geospatial relationship of pterygium and senile cataract to ambient solar ultraviolet in tropical Ecuador

20-Jun-2018 | Daniel R. Garzon-Chavez; Emmanuelle Quentin; Simone Lee Harrison; Alfio Parisi; Harry J. Butler; Nathan Downs, Photochemical & Photobiological Sciences, 2018

Tropical Ecuador presents a unique climate in which to study the relationship between ambient levels of solar ultraviolet radiation and eye disease in the absence of a latitudinal gradient. The national distribution of surface ultraviolet, taking into account MODIS and OMI satellite observation ...

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Synthetic, small-molecule photoantimicrobials – a realistic approach

20-Jun-2018 | Mark Wainwright, Photochemical & Photobiological Sciences, 2018

The search for suitable, low-molecular weight photoantimicrobials for use in infection control has strong foundations in conventional antiseptic research from the early-mid 20th Century. Many examples of dyes exist having conventional antimicrobial activity among the azine, acridine and ...

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Photochemistry of 9-acridinecarboxaldehyde in aqueous media

20-Jun-2018 | Wolf-Ulrich Palm, Photochemical & Photobiological Sciences, 2018

Dark and photolysis reactions in solution were investigated for 9-acridinecarboxaldehyde (ACL). ACL reacts in the dark at T = 20 oC and pH = 7.0 in an air saturated solution to the main product 9-acridinecarboxylic acid (ACA) and to the minor product 9-acridinemethanol (ACM) with a lifetime of τ ...

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