Photosensitizers (PS) are compounds that can generate reactive oxygen species under irradiation of appropriate light and are widely used in photodynamic therapy (PDT). Currently, topical PDT is an effective treatment for several skin diseases, including bacterial infections, fungal mycoses and psoriasis. In addition, PDT is also used to treat non‐melanoma skin cancer and can be a potential tool for

In the paper, a composite TiO2/SiO2‐NHOC‐FA was prepared using the coupling method which is a folic acid‐targeted silica‐coated titanium dioxide. Their structures were characterized by Fourier transform infrared spectroscopy (FT‐IR), Ultraviolet‐visible spectroscopy (UV‐vis), X‐ray diffraction (XRD), Transmission electron microscope (TEM) and Zeta potential method. The results showed that the average

In vitro experiments confirmed that antibacterial photodynamic treatment (aPDT) inactivates periodontal pathogens. However, more effective sterilization is needed in the complex oral environment. This study tested whether dihydroartemisinin (DHA) enhanced the photokilling effect of aPDT on Porphyromonas gingivalis(P. gingivalis) in planktonic and biofilm states. aPDT combining toluidine blue O (TBO)

Photoageing and skin cancer are major causes of morbidity and are a high cost to society. Interest in the development of photoprotective agents for inclusion in topical cosmetic and sunscreen products is profound. Recently, amino acids with a sulfinic group, notably hypotaurine, have been included as ingredients in cosmetic preparations. However, the mechanism of action of hypotaurine as a possible

Three pyreno[4,5‐d]imidazole derivatives are synthesized and evaluated as fluorescent sensors for bismuth (III) ion. The target compounds are prepared in 55 to 86 % yields from a condensation reaction between pyrene‐4,5‐dione and aromatic aldehydes. The compound bearing a phenolic group can selectively detect bismuth (III) ion via fluorescence enhancement with a detection limit of 1.20 μM in CH3CN‐DMSO

The reaction paths of methylenecyclopropane 1 on the potential energy surfaces (PESs) of the lowest triplet (T1) state and the lowest excited singlet (S1) state, as well as that of the ground state (S0), were explored by using the nudged elastic band method at the MRMP2//MCSCF/6‐31++G(d,p) and DFT(B3LYP)/6‐31++G(d,p) levels of theory. After vertical excitation of 1, three transition states on the PES

This research presents a novel methodology for deriving the total daily broadband solar UVA (320‐400 nm) received by school teachers during their working day from Ozone Monitoring Instrument (OMI) satellite solar noon UVA irradiance measurements for a Queensland sub‐tropical site (27.5oS, 152oE). Daily UVA exposures are weighted to the anatomical human cheek (anterior infra‐orbital region) for teachers

This study presents the preparation of a new phthalonitrile derivative namely 3‐(4‐(trifluoromethoxy)thiophenoxy)phthalonitrile (1) and a series of its metallated phthalocyanines (M= Zn (II) (1a) and In(III) (1b)). In addition, the peripheral analog of the indium phthalocyanine (2b) was newly synthesized. Characterization of the resulting compounds was carried out by utilizing various spectroscopic

Traditionally, the general photochemical rate equation could be integrated only at two limits (high concentration and low concentration). In this paper, the general photochemical equation has been integrated to yield a master equation that is valid for any chromophore concentration. Hence, in future, data for all concentrations can be utilized in deriving the incident photon flux and/or the quantum

The aim of the present study was to evaluate the comparative effects of red (660‐nm) and near‐infrared (780‐nm) low‐level laser therapy (LLLT) on viability, mitochondrial activity, morphology and gene expression of growth factors on Schwann cells (SC). ST88‐14 cells were grown in RPMI 1640 with 10 mM of HEPES, 2 mM of glutamine, 10% fetal bovine serum and 1% antibiotic‐antimycotic solution at 37°C

Absorption spectra and fluorescence spectra are essential for use across the photosciences, yet such spectra along with the all‐important values for molar absorption coefficient (ε) and fluorescence quantum yield (Φf) often are found with great difficulty. Here, a literature survey concerning the vital class of chlorophyll compounds has led to identification of spectra for 150 members. Spectra in print

In this issue, Yamano et al. provide further evidence that germicidal 222‐nm far UV light has no immediate and delayed harmful effects on the skin and ocular tissue of rats. The safety of 222‐nm krypton–chlorine excimer lamps, highlighted in the commentary article, has already received relevant applications in the treatment of surgical site infections and in the control of airborne and foodborne pathogens

Phytochromes are photosensitive proteins with a covalently bound open‐chain chromophore that can switch between two principal states: red‐light absorbing Pr and far‐red light absorbing Pfr. Our group has previously shown that the bacteriophytochrome from Xanthomonas campestris pv. campestris (Xcc BphP) is a bathy‐like phytochrome that uses biliverdin IXα as a co‐factor and is involved in bacterial