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Eggshell microstructure, shell quality indices, mineralogy, and UV-Vis absorbance of domestic eggs of Iran J. Photochem. Photobiol. Pub Date : 2024-03-07 M.B. Fathi, Z. Taghizadeh Rahmat Abadi
The structure and quality of eggshells (ES) vary around a mean value depending on different items, and these variations are important in their many industrial and technological applications as will be mentioned (vide infra). Five commercial egg brands of different laying hens are examined and their quality indices, morphological microstructure, elemental composition, and light absorbance at 200 – 700
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Solvent selection for anthrocyanin dye extraction from Kigelia Africana and Hibiscus sabdariffa for dye sensitized solar cells J. Photochem. Photobiol. Pub Date : 2024-02-22 T. Satish Kumar, S. Shalini, T. Anurag Roy, S. Prasanna, R. Balasundaraprabhu, Senthilarasu Sundaram
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Fenton-mediated solar-driven photocatalysis of industrial dye effluent with polyaniline impregnated with activated TiO2-Nps J. Photochem. Photobiol. Pub Date : 2024-02-07 Joshua Akinropo Oyetade, Revocatus Lazaro Machunda, Askwar Hilonga
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Development of a red-shifted photosensitizer for near-infrared photoimmunotherapy of cancer J. Photochem. Photobiol. Pub Date : 2024-02-05 Yuto Goto, Kanta Ando, Hideo Takakura, Kohei Nakajima, Masato Kobayashi, Osamu Inanami, Tetsuya Taketsugu, Mikako Ogawa
Near-infrared photoimmunotherapy (NIR-PIT) is a recently described method for cancer treatment that utilizes an antibody-conjugated phthalocyanine photosensitizer and NIR light. In NIR-PIT, light of 690 nm wavelength is used to activate a photosensitizer, IR700, while longer-wavelength light penetrates deeper into tissues. Thus, more effective NIR-PIT would be achieved by using photosensitizers that
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Persicaria senticosa extract mitigates ultraviolet B-induced photoaging by suppressing the mitogen-activated protein kinase/activator protein 1/matrix metalloproteinase 1 pathway in human keratinocytes and hairless mice J. Photochem. Photobiol. Pub Date : 2024-01-23 Ji-Ae Hong, Hae-ju Ko, Kyo-Nyeo Oh, Moonjong Kim, Jung-Soon Mo, Chul Yung Choi, Ki-Man Kim, Donghyuk Bae
Ultraviolet (UV) irradiation has been identified as a key trigger for skin photoaging, characterized by the overproduction of matrix metalloproteinases (MMPs) and reactive oxygen species (ROS), along with the accelerated decomposition of extracellular matrix (ECM) proteins, ultimately contributing to the development of wrinkles. (PS) extracts are recognized for their antioxidative properties and their
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Unveiling the topographic cue rendered by micropatterns for steering cell differentiation by using extrinsic photobiomodulation J. Photochem. Photobiol. Pub Date : 2024-01-23 Guan-Ying Tsai, Thipwadee Klom-In, Meng-Jiy Wang, Szu-yuan Chen
It is known that cell culture micropatterns have the ability to facilitate stem cell differentiation induced by specialized chemical factors and different differentiation directions have different optimal micropattern shapes. In this study, by utilizing extrinsic photobiomodulation (EPM) with verteporfin as photosensitizer and light irradiation of 690 nm wavelength as a universal, unbiased, and synchronizing
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Pivotal roles of TRPV1 channel and Nrf2 factor in green light modulation of keratinocyte inflammatory response J. Photochem. Photobiol. Pub Date : 2024-01-13 Sara Salman, Sonia Raccah, Audrey Rousseaud, Lieve Declercq, Saadia Kerdine-Römer
Photobiomodulation (PBM) is emerging as a promising non-invasive approach for managing inflammatory skin conditions. However, its precise molecular mechanisms, especially within the green light spectrum, remain elusive. In this study, we investigated the anti-inflammatory mechanisms of 520 nm green light in primary human keratinocytes (KCs) exposed to the contact sensitizer 2,4-dinitrochlorobenzene
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Obtaining triplet-triplet absorption spectra and triplet lifetimes of long-lived molecules with a UV-Visible spectrophotometer J. Photochem. Photobiol. Pub Date : 2024-01-04 Tiago Palmeira, David S. Conceição, Diana P. Ferreira, Carla C. Ferreira, Luís F. Vieira Ferreira, Mário N. Berberan-Santos
A simple method for obtaining triplet-triplet absorption (TTA) spectra and triplet state (T) lifetimes of long-lived triplets is presented and demonstrated with the polycyclic aromatic hydrocarbon coronene (both normal and perdeuterated forms) in a polymer matrix at room temperature. The TTA spectra obtained with a camera flash and a spectrophotometer are noisier but otherwise identical to those obtained
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SuperDopa (SD), SuperDopa amide (SDA) and Thioredoxin-mimetic peptides protect ARPE-19 cells from photic- and non-photic stress J. Photochem. Photobiol. Pub Date : 2023-12-12 Magdalena M Olchawa, Grzegorz Szewczyk, Marva Lachish, Tadeusz Sarna, Daphne Atlas
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Historical perspective on sunscreens: Shift towards worldwide individualized photoprotection J. Photochem. Photobiol. Pub Date : 2023-12-16 Morgane Burq, Michèle Verschoore
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Photobiomodulation therapy for the prevention and treatment of acute radiation dermatitis in head and neck cancer: A case series J. Photochem. Photobiol. Pub Date : 2023-12-13 Barbara Tamires Cruz Aires, Rayenne Augusta Mota Ferreira, Jean Carlos Serra Costa, Ceci Nunes Carvalho, Meire Coelho Ferreira, Cyrene Piazera Silva Costa
Objective to evaluate the effects of photobiomodulation therapy (PBMT) in the prevention of radiodermatitis in patients with head and neck cancer and to describes a protocol for the use of low-power laser with different energy doses according to the grades of acute radiation dermatitis (ARD). Methods and materials This is a case series study and were evaluated the medical records of 15 patients with
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The phenomenon of phototoxicity and long-term risks of commonly prescribed and structurally diverse drugs J. Photochem. Photobiol. Pub Date : 2023-12-05 Anna E. Davis, Gabrielle E. Kennelley, Tatiana Amaye-Obu, Peter F. Jowdy, Sarah Ghadersohi, Mehr Nasir-Moin, Gyorgy Paragh, Harvey A. Berman, Wendy J. Huss
Photosensitivity to structurally diverse drugs is a common but under-reported adverse cutaneous reaction and can be classified as phototoxic or photoallergic. Phototoxic reactions occur when the skin is exposed to sunlight after administering topical or systemic medications that exhibit photosensitizing activity. These reactions depend on the dose of medication, degree of exposure to ultraviolet light
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Rooting out ultraweak photon emission a-mung bean sprouts J. Photochem. Photobiol. Pub Date : 2023-12-05 Alasdair M. Mackenzie, Holly E. Smith, Rhys R. Mould, Jimmy D. Bell, Alistair V.W. Nunn, Stanley W. Botchway
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Investigating mass transport and recombination as a function of structural variation in dye-sensitized solar cells employing indole fused heterocyclic organic sensitizers and cobalt electrolytes J. Photochem. Photobiol. Pub Date : 2023-12-07 Jayadev V, Sourava C. Pradhan, P.R. Nitha, Jubi John, K.N. Narayanan Unni, Suraj Soman
Alternate cobalt redox mediator based dye-sensitized solar cells (DSCs) are getting widespread attention taking advantage of their one-electron transfer mechanism compared to the conventional iodide/triiodide electrolyte. In the present study, we used indole fused heterocyclic organic sensitizers having indolo[3,2-b]indole as donor with three different π-spacers [(benzene (IID-1), thiophene (IID-2)
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Light-emitting diode (LED) photobiomodulation exerts anti-inflammatory action in murine thioglycolate-elicited macrophages stimulated by Bothrops jararacussu venom and by isolated PLA2s J. Photochem. Photobiol. Pub Date : 2023-11-27 Valdison P. Reis, Alex A. Ferreira e Ferreira, Sulamita da S. Setúbal, Hallison M. Santana, Milena D.S. Silva, Carolina P. da Silva, Neriane M. Nery, Charles Nunes Boeno, Mauro V. Paloschi, Andreimar M. Soares, Stella R. Zamuner, Juliana P. Zuliani
Although the treatment currently recommended for snakebite accidents is serum therapy using antivenom, a need for adjunctive therapy associated with serum therapy for treating the local effects caused by snakebites is an effort of the WHO to reduce local signals and symptoms. Photobiomodulation with laser or LED therapy is one of the primary examples of adjuvant therapy to serum therapy to lessen these
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DNA lesions triggered by visible light in skin cells: In the search for comprehensive sun protection J. Photochem. Photobiol. Pub Date : 2023-11-25 Paulo Newton Tonolli, Orlando Chiarelli-Neto, Maurício S. Baptista
Skin cells present many endogenous photosensitizers (ePS) that interact with light, generating oxidizing species, causing molecular damage in proteins, lipids, and nucleic acids, and consequently triggering cellular and organelle malfunction. Several cell lines with terminal differentiation are susceptible to accumulating non-digestible pigments, such as lipofuscin or melanin-lipofuscin. Besides being
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Synthesis of pyrenocycloalkenes by using [2 + 2] photocycloaddition to pyrene and Diels–Alder reaction J. Photochem. Photobiol. Pub Date : 2023-11-29 Hajime Maeda, Masashi Maeda, Masahito Segi
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Cell and tissue-based models for evaluating the cutaneous impact of visible light J. Photochem. Photobiol. Pub Date : 2023-11-28 Anthony Brown, Carles Trullas, Eric Jourdan
Owing to its low energy, visible light (VIS) was previously considered to have no photobiological effects and research was focused on the ultraviolet (UV) end of the solar spectrum. However, the discovery that exposure of skin to VIS leads to clinical changes in skin reminiscent of those of UV led to a reassessment of its effects. Driving our understanding have been cell and tissue-based models that
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Use of reconstructed skin model to assess the photoprotection afforded by three sunscreen products having different SPF values against DNA lesions and cellular alterations J. Photochem. Photobiol. Pub Date : 2023-11-25 D. Lelièvre, F. Canivet, F. Thillou, C. Tricaud, C. Le Floc'h, F. Bernerd
Introduction Both UVB and UVA rays induce biological damages in the epidermis and the dermis that contribute to photo-carcinogenesis and photoaging. In the present study, the photoprotective effect of 2 ISO standard sunscreens, P3 (Sun Protection Factor [SPF]15) and P6 (SPF40) and of an SPF50+ labeled commercial sunscreen product was tested in reconstructed skin tissues exposed to increasing doses
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A review of photobiomodulation on PI3K/AKT/mTOR in wound healing J. Photochem. Photobiol. Pub Date : 2023-11-25 Patricia Kasowanjete, Sathish Sundar Dhilip Kumar, Nicolette N. Houreld
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Synthesis of CuInS2 nanoparticles and application in the photocatalytic degradation of tetracycline J. Photochem. Photobiol. Pub Date : 2023-10-21 Damian C. Onwudiwe, Opeyemi A. Oyewo, Naledi H. Seheri, Mathato P. Motaung, Seshibe S Makgato, Sarah C. Motshekga
A lot of effort has been given to the development of nontoxic ternary semiconductor nanoparticles that could act as photocatalyst NIR-I (750–850 nm) or NIR-II (1000–1400 nm) optical windows. This is due to their good stability, high optical absorption coefficient, and desirable band gap that absorbs well within the solar spectrum. CuInS2 is one of the ternary sulphide semiconductors, which has been
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Wavelength dependent excited state dynamics observed in canonical pyrimidine nucleosides J. Photochem. Photobiol. Pub Date : 2023-10-13 Peicong Wu, Xueli Wang, Haifeng Pan, Jinquan Chen
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The effect of photobiomodulation auriculotherapy in the treatment of temporomandibular disorders: A double-blind randomized feasibility study J. Photochem. Photobiol. Pub Date : 2023-10-06 Sara Lisboa Marques, Andressa Cristine da Silva Ramos, Érika Almeida Boggiss, Rosana Aparecida de Lima, Carina Ferreira Pinheiro-Araújo, Adriana Teresa Silva Santos, Andréia Maria Silva Vilela Terra
Introduction Temporomandibular disorders (TMD) are considered the most common complaint associaetd with orofacial pain. A treatment approach for TMD is photobiomodulation auriculotherapy, however, a method that which still requires studies mainly with pulsed frequency. Objective To evaluate the feasibility of conducting a randomized clinical trial using pulsed frequency photobiomodulation auriculotherapy
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Light-mediated double-strand DNA cleavage by an alkyldicobalamin J. Photochem. Photobiol. Pub Date : 2023-10-05 Liberty N. Gendron, Jennifer R. Shell, Thomas A. Shell
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Photoinduced radical generation and trapping by acrylonitrile of N-Boc secondary amine and N-Boc N-methyl α-amino acid ester at α-position using two-molecule photoredox catalysts J. Photochem. Photobiol. Pub Date : 2023-09-14 Shoki Nagaya, Hibiki Miyagawa, Ryoga Hashimoto, Toshiki Furutani, Mugen Yamawaki, Hirotsugu Suzuki, Toshio Morita, Yasuharu Yoshimi
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Deciphering mechanism of excited state reactivity by spectroscopic methods J. Photochem. Photobiol. Pub Date : 2023-09-16 Sarvar Aminovich Rakhimov, Malcolm D.E. Forbes, Jayaraman Sivaguru
The Feature highlights Electron Paramagnetic Resonance (EPR) spectroscopy as an indispensable tool to understand the excited state reactivity of organic molecules.
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Excited-state tris(pentafluorophenyl)borane as a strong single-electron oxidant: Photophysical properties and catalysis J. Photochem. Photobiol. Pub Date : 2023-08-29 Yoshitaka Aramaki, Yuki Uchida, Ryo Ishikawa, Takashi Ooi
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Anionic clay surface facilitates electron transfer between an excited donor encapsulated within a cationic capsule and a cationic electron acceptor J. Photochem. Photobiol. Pub Date : 2023-08-13 Natsuki Morita, A. Mohan Raj, Takuya Fujimura, Tetsuya Shimada, Vaidhyanathan Ramamurthy, Shinsuke Takagi
Fluorescence quenching of an excited guest encapsulated within a cationic host by a cationic molecule was examined on an anionic inorganic surface. Repulsion between the host and the quencher was overcome by adsorbing both an anionic surface. Dimethyl stilbene (DMS), octa amine (OAm216+), viologen derivatives (VD2+) and saponite are used as guest, cationic capsule, cationic electron acceptor and anionic
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Biochemical reactions remote-sensitized by excitons propagating across macroscopic distances along biological fibers: Isomerization of 11-cis-retinal J. Photochem. Photobiol. Pub Date : 2023-08-07 Igor Khmelinskii, Vladimir Makarov
Presently we report a second example of a biochemical reaction sensitized remotely by excitons (electronic excited states) efficiently transferred along intermediate filaments (IFs) over macroscopic distances. IFs are excellent conductors of energy in the form of excitons, with the efficiency of ca. 0.53 reported in vitro. Excitons were generated by visible light and propagated along Müller cell (MC)
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Recent progress in photocatalytic reactions involving the excitation of electron-primed catalysts J. Photochem. Photobiol. Pub Date : 2023-08-10 Takashi Koike
Open-shell species are attracting significant attention owing to their unique physicochemical properties and highly reactive characteristics. Over the past decade, photoredox catalysis (PRC) has emerged as a powerful strategy for radical reactions. Recently, photocatalysis involving the excitation of open-shell catalytic species generated from in situ photo- or electrochemical electron transfer has
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Implications of visible light and means of photoprotection J. Photochem. Photobiol. Pub Date : 2023-08-07 Brittany Lane, Henry W. Lim, Iltefat H. Hamzavi, Tasneem F. Mohammad, Indermeet Kohli
Visible light (VL) has been shown to promote genotoxicity through free radical generation and structural protein degradation. These stressful events promote cellular vulnerability, which manifests clinically as erythema, hyperpigmentation, and photoaging. Having established biologic impacts of VL, development of photoprotection strategies against this part of the solar spectra are warranted. This invited
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Examining the role of visible light in photocarcinogenesis – Lessons from the past J. Photochem. Photobiol. Pub Date : 2023-08-01 Curtis Cole, Paul Donald Forbes
Recent publications have confirmed the ability of visible light from sunlight (in the absence of Ultraviolet A or B) to cause free radical formation in human skin, increases in metalloproteinases, induced pigmentation and even erythema from exposures within reasonable exposure periods (e.g. less than 8 h). This raises questions regarding the role of visible light on the formation of skin cancers and
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Photobiomodulation: Cellular, molecular, and clinical aspects J. Photochem. Photobiol. Pub Date : 2023-07-23 Márcia Cristina Prado Felician, Renata Belotto, João Paulo Tardivo, Mauricio S. Baptista, Waleska Kerllen Martins
Photobiomodulation (PBM) is a noninvasive photonic-based therapy, capable of dealing with immune-inflammatory, neurological, and musculoskeletal disorders, as well as healing oral and chronic skin wounds. During PBM light is applied at a specific wavelength, either in the visible or near-infrared (NIR) ranges. Photophysical and photochemical processes might stimulate or inhibit various biological processes
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Social isolation increases metabolic rate in the transition of light- to dark- phase and advances Rev-erb-α expression in brown adipose tissue to regulate daily rhythm of core body temperature in mice J. Photochem. Photobiol. Pub Date : 2023-07-16 Paola Fernandes, Hellen Nunes, Tamires Amorim Marinho, Pietra Souza Barsanele, Maria Nathália Moraes, Maristela de Oliveira Poletini
Mammals use social thermoregulation to maintain the core body temperature (Tc) at a lower energy cost. Brown adipose tissue (BAT) plays a crucial role in thermoregulation. This study tested the hypothesis that social isolation induces alterations in thermogenesis and metabolism to maintain the rhythm of Tc throughout the day. Adult male mice (C57BLJ/6) were maintained in groups of 4–5 (group-housed)
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Induction of chirality in the charge transfer complex photochemistry J. Photochem. Photobiol. Pub Date : 2023-07-14 Tadashi Mori
Electron donor and acceptor undergo association in solution to form a weak molecular complex, namely a charge transfer complex. The formation of the complex is apparent by its new low-energy absorption band. Upon photoexcitation of this charge transfer band, an intracomplex electron transfer is facilitated to form a contact ion radical pair. The theoretical basis for the complex formation and the subsequent
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Application of bioinspired W/WO3 electrodes electrochemically constructed on microbial biofilm for the disinfection of dialysate contaminated by Candida parapsilosis J. Photochem. Photobiol. Pub Date : 2023-07-05 Barbara A. Souza, Maria José S.M. Giannini, Monica Yonashiro, Maria Valnice Boldrin Zanoni
The present work investigates the disinfection of dialysate water used in hemodialysis through the application of bioinspired W/WO3 electrodes constructed on microbial biofilm from C. parapsilosis by electrochemical anodization. The bioinspired electrode was photoactivated by UV/Vis or visible irradiation, and the photocurrent was found to be at least twice higher than that obtained for nanoporous
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Modeling the influence of nighttime light on melatonin suppression in humans: Milestones and perspectives J. Photochem. Photobiol. Pub Date : 2023-07-06 Lucia Helena Souza de Toledo, Maria Nathália Moraes, Maristela de Oliveira Poletini, José Cipolla Neto, Jerome Baron, Theo Mota
This review presents the main metrics developed so far to correlate physical properties of light and its effects on melatonin suppression. Melatonin is a hormone secreted at night and its production is suppressed by exposure to light. In this context, the negative effects of lighting at night and high exposure to light raise the need for a better quantification of these impacts on health. Different
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Electron and hydrogen atom donor photocatalysts in situ generated from benzimidazolium salts and hydride reagents J. Photochem. Photobiol. Pub Date : 2023-06-22 Ryo Miyajima, Takehiro Kiuchi, Yuki Ooe, Hajime Iwamoto, Shin-ya Takizawa, Eietsu Hasegawa
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An evidence of electron donor behavior of single-walled carbon nanotube in photo-induced electron transfer J. Photochem. Photobiol. Pub Date : 2023-06-17 Koji Inada, Yasuyuki Araki, Atula S.D. Sandanayaka, Osamu Ito
The electron transfer reaction between C60 and SWCNTs in D2O was investigated. Repeated laser irradiation of water-soluble C60 encapsulated in γ-cyclodextrin and SWCNTs with carboxymethylcellulose dispersed in D2O resulted in the accumulation of C60 anion radicals and a decrease in the E11 absorption band of SWCNTs, strongly suggesting electron transfer between C60 and SWCNTs. Transient absorption
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Concise review on seaweed photosynthesis: From physiological bases to biotechnological applications J. Photochem. Photobiol. Pub Date : 2023-06-15 Aline P. Martins, Pio Colepicolo, Nair S. Yokoya
Seaweeds play an important role for the environment, since they are photosynthetic organisms, contributing to the cycling of nutrients and to the protection and feeding of several animals. The potential for biotechnological applications of marine macroalgae biomass is enormous, and to attend the demand of the current market, the knowledge of the physiological characteristics of these organisms is essential
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Recent advances in visible light mediated photoinduced aryl radical generation and its application in synthesis J. Photochem. Photobiol. Pub Date : 2023-06-14 Tubai Ghosh, Sougata Santra, Grigory V. Zyryanov, Brindaban C. Ranu
The reactions involving aryl radicals is an efficient strategy for the synthesis of a wide variety of important molecules. We have highlighted here recent developments on the generation of aryl radicals from various substrates by visible light mediated photocatalysis and their reactions with different substrates to produce a library of arylated and het-arylated compounds. These reactions are performed
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Peptide-bridged bis-porphyrin compounds: A photophysical and molecular dynamics study J. Photochem. Photobiol. Pub Date : 2023-06-13 Rita Cimino, Emanuela Gatto, Marta De Zotti, Fernando Formaggio, Claudio Toniolo, Micaela Giannetti, Antonio Palleschi, Carlos Serpa, Mariano Venanzi
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Novel hole transporting materials based on cyclopentadithiophene for perovskite solar cells J. Photochem. Photobiol. Pub Date : 2023-06-10 Ying-Sheng Lin, Nai-Hwa Chen, Yi-Ru Chen, Kollimalayan Kalidass, Hsiu-Yao Cheng, Parthasarathy Venkatakrishnan, Tahsin J. Chow, Yuan Jay Chang
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Triphenylimidazole substituted D-π-D porphyrin based dopant-free hole transport materials for perovskite solar cells J. Photochem. Photobiol. Pub Date : 2023-06-10 Koteshwar Devulapally, Towhid H Chowdhury, Yulu He, Manne Naga Rajesh, Seelam Prasanthkumar, Ashraful Islam, Lingamallu Giribabu
Hole-transport materials (HTMs) contribute an important function in perovskite solar cells (PSCs) for achieving favourable photovoltaic performance with durability. In this work, we designed and synthesized a series of porphyrin based hydrophobic HTMs based on donor-π-donor (D-π-D) tactic in which triphenylimidazole as donor and either free-base porphyrin (H2LD) or metalloporphyrin (Cu, CuLD or Zn
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OH−/H+ dual-ion energy assisted electricity effective photoelectrochemical water splitting J. Photochem. Photobiol. Pub Date : 2023-06-08 Soumodip Sur, Ritwik Mondal, Musthafa Ottakam Thotiyl
Photoelectrochemical (PEC) water splitting is an emerging technology to store the solar energy in the chemical bonds of molecular hydrogen. Among several photo electrodes used for PEC water splitting, α-Fe2O3 is a promising material due to its suitable bandgap, chemical stability, and abundance. Despite these, the position of its conduction band does not allow spontaneous movement of photo-generated
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Cell death mechanisms in retinal phototoxicity J. Photochem. Photobiol. Pub Date : 2023-06-02 Anaïs Françon, Alicia Torriglia
Retinal phototoxicity is the main mechanism by which light induces damage to the retina, the sensitive part of the eye. The impact of light on the different retinal layers varies depending on several factors including the wavelength of the incident light, its energy, and the exposure time. We propose an overview of the factors modulating the amount of light that reaches the retina, the type of damage
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2-Azafluorenone derivatives: Photocatalyst for oxygenation of toluene via electron transfer and hydrogen-atom transfer J. Photochem. Photobiol. Pub Date : 2023-05-25 Haruyasu Asahara, Yurie Horikawa, Kento Iwai, Nagatoshi Nishiwaki, Kei Ohkubo
2-Aza-9-fluorenone derivatives were synthesized and their optical properties were investigated. The UV–visible absrption spectra revealed λmax values in the range of 350–380 nm, with a shift to the longer wavelength when an electron-donating group was substituted on the aryl group at the 3-position adjacent to the nitrogen in the azafluorenone. N-Methyl-2-azafluorenone was synthesized by methylating
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Opsins as main regulators of skin biology J. Photochem. Photobiol. Pub Date : 2023-05-24 Ana Maria de Lauro Castrucci, Maurício S. Baptista, Leonardo Vinicius Monteiro de Assis
Opsins are light-sensitive proteins that are found across the animal kingdom. In mammals, opsins are classically associated with image-forming processes, a function exerted by cone and rod opsins. In early 2000, melanopsin was identified in the human retina as an important regulator of non-image forming events such as melatonin suppression, pupillary constriction, and circadian rhythm adjustment. The
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Direct arylation reaction of heteroarenes mediated by photoinduced electron transfer J. Photochem. Photobiol. Pub Date : 2023-05-25 Eiji Yamaguchi, Oe Karin, Akichika Itoh
Electron donor–acceptor (EDA) complexes are interesting chemical species that function as molecular complexes. In this context, chemists have actively studies the use of halogen bonding as a noncovalent interaction in photochemistry. This study focused on developing a direct arylation reaction using aryl radicals generated by photoinduced electron transfer (PET) through halogen-bonding interactions
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The inhibitory and inactivating effects of visible light on SARS-CoV-2: A narrative update J. Photochem. Photobiol. Pub Date : 2023-05-24 Shelley Gorman
Prior to the coronavirus disease-19 (COVID-19) pandemic, the germicidal effects of visible light (λ = 400 – 700 nm) were well known. This review provides an overview of new findings that suggest there are direct inactivating effects of visible light – particularly blue wavelengths (λ = 400 – 500 nm) – on exposed severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) virions, and inhibitory effects
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Enhanced Fluorescence behavior of Safranine-O by complexing with inorganic clay nanosheets J. Photochem. Photobiol. Pub Date : 2023-05-18 Masbooth Rasa Melechalil, Kyosuke Arakawa, Yugo Hirade, Fazalurahman Kuttassery, Tetsuya Shimada, Tamao Ishida, Shinsuke Takagi
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Electrodeposited NiFe2O4/Cu2O heterostructure thin films with enhanced photocurrent generation J. Photochem. Photobiol. Pub Date : 2023-05-15 Samba Siva Vadla, Sruthi Guru, Tripta Parida, Subish John, Somnath C. Roy, G. Ranga Rao
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The UV Index color palette revisited J. Photochem. Photobiol. Pub Date : 2023-04-27 Eduardo Luccini, Facundo Orte, Julián Lell, Fernando Nollas, Gerardo Carbajal, Elián Wolfram
The UV Index (UVI), standardized by the World Health Organization (WHO) in 2002, is an internationally accepted reference for disseminating information on solar UV radiation levels with the purpose of preventing the harmful effects on human health by sun overexposure. The UVI is the erythemal irradiance expressed in a dimensionless unit, with numerical values adapted to a risk scale that considers
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Endocytic internalization mechanism of bioactive antibacterial nanoparticles by fibroblasts J. Photochem. Photobiol. Pub Date : 2023-04-13 Maryam Ghaffari, Anil Kishen, Annie Shrestha
Studying the uptake mechanism of photosensitizers is an important step in developing an ideal photosensitizer for use in photodynamic therapy (PDT). Understanding the uptake mechanism can help design novel photosensitizers that are selectively accumulated in the target tissue, with improved pharmacokinetics, and are dosed optimally to maximize the efficacy of the treatment. In our previous studies
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Photoreceptor contributions to the human pupil light reflex J. Photochem. Photobiol. Pub Date : 2023-04-02 Pablo A. Barrionuevo, Luis A. Issolio, Constanza Tripolone
The pupil reacts to the amount of light reaching the eye. It reduces its size when the light is high and dilates at low light levels to allow the entrance of more photons. This behavior is called pupil light reflex (PLR). Recent investigations in humans were conducted to understand how the photoreceptor signals are combined to drive the pupil light reflex. This review is about the physiological processes
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Non-image-forming functional roles of OPN3, OPN4 and OPN5 photopigments J. Photochem. Photobiol. Pub Date : 2023-04-02 Ramanujam Karthikeyan, Wayne I.L. Davies, Lena Gunhaga
Detecting different wavelengths and intensities of environmental light is crucial for the survival of many animals. In response, a multiplicity of opsins (a special group of photosensitive G protein-coupled receptors), when combined with a retinal chromophore, is able to directly detect light and initiate different downstream phototransduction signaling cascades. Although avian studies from the 1930s
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Titanium Dioxide Nanoparticles in sunscreens and skin photo-damage. Development, synthesis and characterization of a novel biocompatible alternative based on their in vitro and in vivo study J. Photochem. Photobiol. Pub Date : 2023-03-30 M.Virginia Vaudagna, Virginia Aiassa, Aida Marcotti, María Fernanda Pince Beti, María Florencia Constantín, Mariela Fernanda Pérez, Ariana Zoppi, María Cecilia Becerra, M.Jazmin Silvero C․
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Photophysical and electrochemical properties of 9-naphthyl-3,6-diaminocarbazole derivatives and their application as photosensitizers J. Photochem. Photobiol. Pub Date : 2023-03-22 Ryosuke Matsubara, Huilong Kuang, Tatsushi Yabuta, Weibin Xie, Masahiko Hayashi, Eri Sakuda
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The role of the epidermal physode layer in UV protection of Fucus species J. Photochem. Photobiol. Pub Date : 2023-03-17 Rafael Meichssner, Mira Wilkens, Frauke Pescheck, Wolfgang Bilger
Phlorotannins are believed to provide UV protection in brown algae. In Fucus species, phlorotannin-rich vesicles (“physodes”) form an “epidermal physode layer”, which might represent the anatomical structure responsible for UV protection. However, this layer has been neglected so far; instead, phlorotannin contents of entire thalli were studied in UV exposure experiments. We employed fluorometric methods
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Cocrystallization with nicotinamide promotes naproxen photodegradation in the solid-state J. Photochem. Photobiol. Pub Date : 2023-03-02 Kohei Kawabata, Ayano Miyoshi, Hiroyuki Nishi