In vivo excitation of photosensitizers by infrared light.

abstract：:Well-resolved vibrational spectra of LH2 complex isolated from two photosynthetic bacteria, Rhodobacter sphaeroides and Ectothiorhodospira sp., were obtained using surface-enhanced resonance Raman scattering (SERRS) exciting into the Qx and the Qy transitions of bacteriochlorophyll a. High-quality SERRS spectra in the...

journal_title：Photochemistry and photobiology

authors： Chumanov G,Picorel R,Ortiz de Zarate I,Cotton TM,Seibert M

更新日期：2000-05-01 00:00:00

abstract：:Excess exposure to UV radiation can affect our health by causing sunburn, skin cancer, etc. It is therefore useful to determine the UV dosage received by people as a way of protecting them from the possible negative effects that this kind of radiation can cause. In this work, the personal outdoor percentage, which sho...

journal_title：Photochemistry and photobiology

authors： Gurrea G,Cañada J

更新日期：2007-11-01 00:00:00

abstract：:Catalases are oxidized by singlet oxygen giving rise to more acidic conformers detected in zymograms after electrophoresis in polyacrylamide gels. This shift in catalase mobility can be indicative of singlet oxygen production in vivo. Catalase from human cells, as from many organisms, is susceptible to in vitro modifi...

journal_title：Photochemistry and photobiology

authors： Lledías F,Hansberg W

更新日期：1999-12-01 00:00:00

abstract：:Polarized steady-state fluorescence and fluorescence excitation spectra as well as time-resolved fluorescence for B-phycoerythrin (B-PE) from red algae, Porphyridium cruentum, embedded in polyvinyl stretched films were measured. The lifetimes of polarized fluorescence were analyzed using exponential components and fra...

journal_title：Photochemistry and photobiology

authors： Frackowiak D,Ptak A,Gryczynski Z,Gryczynski I,Targowski P,Zelent B

更新日期：2004-01-01 00:00:00

abstract：:Photodynamic therapy (PDT) with photosensitizer verteporfin is a clinically approved vascular disrupting modality that is currently in clinical trial for cancer treatment. In this study, we evaluated PDT in combination with either mTORC1 inhibitor rapamycin or mTORC1/C2 dual inhibitor AZD2014 for therapeutic enhanceme...

journal_title：Photochemistry and photobiology

authors： Kraus D,Palasuberniam P,Chen B

更新日期：2020-03-01 00:00:00

abstract：:Assignment of the fluorescence spectrum of firefly luciferin in aqueous solutions was achieved by utilizing not only emission energies but also theoretical absorption spectra and relative concentrations as estimated by pKa values. Calculated Gibbs free energies were utilized to estimate pKa values. These pKa values we...

journal_title：Photochemistry and photobiology

authors： Hiyama M,Akiyama H,Yamada K,Koga N

更新日期：2014-01-01 00:00:00

abstract：:We report that exo- and endogenous guanosine 3',5'-cyclic monophosphate (cGMP) specifically influenced the photophobic response. In behavioral experiments the slowly hydrolyzable and membrane-permeable analogs of cGMP (8-bromo-cGMP [Br-cGMP] and N6,2'-o-dibutyryl-cGMP) dramatically prolonged the time for ciliary stop ...

journal_title：Photochemistry and photobiology

authors： Walerczyk M,Fabczak S

更新日期：2001-12-01 00:00:00

abstract：:In this manuscript, we demonstrate the control of film thickness and surface wettability in the photochemical immobilization of poly (vinyl alcohol) (PVA) to a self-assembled monolayer (SAM) containing a phthalimide chromophore. Surface attachment is characterized by ellipsometry and contact angle measurements. The we...

journal_title：Photochemistry and photobiology

authors： Carroll GT,Turro NJ,Mammana A,Koberstein JT

更新日期：2017-10-01 00:00:00

abstract：:It has been proposed that photodegradation of folates may be the reason for the pigmentation of races living under high fluence rates of ultraviolet radiation. The photodegradation of folic acid (FA) induced by ultraviolet-A (UV-A) radiation, in solution and in the presence of human serum albumin (HSA), was studied wi...

journal_title：Photochemistry and photobiology

authors： Vorobey P,Steindal AE,Off MK,Vorobey A,Moan J

更新日期：2006-05-01 00:00:00

abstract：:Photocatalytic degradation of methyl orange (MO) as a model of an organic pollution was accomplished with magnetic and porous TiO(2)/ZnO/Fe(3)O(4)/PANI and ZnO/Fe(3)O(4)/PANI nanocomposites under visible light irradiation. The structures of nanocomposites were characterized by various techniques including UV-Vis absor...

journal_title：Photochemistry and photobiology

authors： Nabid MR,Sedghi R,Gholami S,Oskooie HA,Heravi MM

更新日期：2013-01-01 00:00:00

abstract：:alpha-Terthienyl photosensitizes single strand breaks in pBR322 DNA. Almost identical results were observed under oxygen and under argon. In the presence of oxygen, this DNA nicking was enhanced by histidine and was not affected by superoxide dismutase, catalase, or the antioxidant BHT. Although chemical damage to DNA...

journal_title：Photochemistry and photobiology

authors： Wang TP,Kagan J,Tuveson RW,Wang GR

更新日期：1991-04-01 00:00:00

abstract：:Plant responses to light spectral quality can be exploited to deliver a range of agronomically desirable end points in protected crops. This can be achieved using plastics with specific spectral properties as crop covers. We have studied the responses of a range of crops to plastics that have either (a) increased tran...

journal_title：Photochemistry and photobiology

authors： Paul ND,Jacobson RJ,Taylor A,Wargent JJ,Moore JP

更新日期：2005-09-01 00:00:00

abstract：:In cultured human keratinocytes, the tumor suppressor p53 acts as a control element in the protective response to UVB radiation and is affected by a variety of factors linked to cellular adhesion and differentiation. Because keratinocytes within the epidermis are not a homogeneous population but differ in their prolif...

journal_title：Photochemistry and photobiology

authors： Will K,Neben M,Schmidt-Rose T,Deppert W,Wittern KP,Bergemann J

更新日期：2000-03-01 00:00:00

abstract：:The exposure of outdoor car guards to solar ultraviolet radiation (UVR), the majority with deeply pigmented skin, to solar UVR was measured for five consecutive days during early spring (September 2017) in South Africa using electronic UVR dosimeters attached to the upper arm of each participant. The exposure of the n...

journal_title：Photochemistry and photobiology

authors： Nkogatse MM,Ramotsehoa MC,Eloff FC,Wright CY

更新日期：2019-01-01 00:00:00

abstract：:A 24 h preculture of HT29-18 human colonic adenocarcinoma cells with the sterol synthesis inhibitor lovastatin at concentrations of 0.1-0.5 microM markedly increased the photocytotoxic effect of photofrin II delivered to cells by low density lipoproteins. Under the same conditions, LDL binding and photofrin II (PII) u...

journal_title：Photochemistry and photobiology

authors： Biade S,Mazière JC,Mora L,Santus R,Mazière C,Auclair M,Morlière P,Dubertret L

更新日期：1993-02-01 00:00:00

abstract：:Spatio-temporal patterns in sun exposure underlie variations in skin cancer incidence and vitamin D deficiency, indicate effectiveness of sun protection programs and provide insights into future health risks. From 558 adults across four regions of Australia (Brisbane (27°S), Newcastle (33°S), Geelong and the Western D...

journal_title：Photochemistry and photobiology

authors： Lucas RM,Valery P,van der Mei I,Dwyer T,Pender MP,Taylor B,Ponsonby AL,Ausimmune Investigator Group.

更新日期：2013-05-01 00:00:00

abstract：:In this work, the changes in isoflavone levels and the expression of genes involved in their biosynthesis were studied in two Astragalus by UPLC-MS and real-time PCR after 10 days of UV-B treatment (λmax  = 313 nm, 804 J m-2 ). Isoflavones were significantly induced by UV-B irradiation. The influence might be activate...

journal_title：Photochemistry and photobiology

authors： Liu Y,Liu J,Wang Y,Abozeid A,Tian DM,Zhang XN,Tang ZH

更新日期：2018-01-01 00:00:00

abstract：:Photodimerization of cocrystals of four bispyridylethylenes and two stilbazoles with urea as a template in the solid state has been investigated following our success with thiourea. Four investigated olefins photodimerized quantitatively to a single dimer in the crystalline state only. The reactivity of urea-olefin cr...

journal_title：Photochemistry and photobiology

authors： Bhogala BR,Captain B,Ramamurthy V

更新日期：2015-05-01 00:00:00

abstract：:Singlet oxygen reacts preferentially with three amino acids in proteins, His, Trp and Met. In order to study the specific molecular events that result from such oxidations, calf alpha-crystallin was photooxidized in the presence of uroporphyrin and the reactions were investigated by high performance liquid chromatogra...

journal_title：Photochemistry and photobiology

authors： Dillon J,Chiesa R,Wang RH,McDermott M

更新日期：1993-03-01 00:00:00

abstract：:Skin cancer is the most prevalent cancer, and its assessment remains a challenge for physicians. This study reports the application of an optical sensing method, elastic scattering spectroscopy (ESS), coupled with a classifier that was developed with machine learning, to assist in the discrimination of skin lesions th...

journal_title：Photochemistry and photobiology

authors： Rodriguez-Diaz E,Manolakos D,Christman H,Bonning MA,Geisse JK,A'Amar OM,Leffell DJ,Bigio IJ

更新日期：2019-11-01 00:00:00

abstract：:Elemental sulfur is a low-cost and abundant substance as one of the largest by-products of the oil industry which was widely used in many industrial activities. Cyclo-octasulfur (S8 ) is one of the sulfur allotropes that is a very stable substance in standard conditions. In this study, we report a low-cost and fast me...

journal_title：Photochemistry and photobiology

authors： Peyman VA,Azizian S

更新日期：2020-11-01 00:00:00

abstract：:The photodegradation of the S(+)- and R(-)-ketoprofen (KP) enantiomers in the bovine serum albumin matrix was studied by steady-state photolysis with the use of lambda(irr) > 320 nm and transient absorption spectroscopy with lambda(exc) = 355 nm, at 1/1 and 2/1 KP/BSA molar ratios. R(-)-KP was found to be more labile ...

journal_title：Photochemistry and photobiology

authors： Monti S,Manet I,Manoli F,Morrone R,Nicolosi G,Sortino S

更新日期：2006-01-01 00:00:00

abstract：:The transport mechanisms of 5-aminolevulinic acid methyl ester (5-ALA-ME) have been studied in a human adenocarcinoma cell line (WiDr) by means of 14[C]-labeled 5-ALA-ME. The transport was found to be partly Na+ dependent, while the extracellular Cl- concentration did not affect the uptake. The transport of 5-ALA-ME i...

journal_title：Photochemistry and photobiology

authors： Gederaas OA,Holroyd A,Brown SB,Vernon D,Moan J,Berg K

更新日期：2001-02-01 00:00:00

abstract：:Direct irradiation of estrone aryl and methyl sulfonates in different organic solvents under nitrogen atmosphere was investigated under steady-state conditions. The estrone derivatives reacted efficiently through the photo-Fries rearrangement reaction involving [1;3]-sulfonyl migration providing the ortho-sulfonyl est...

journal_title：Photochemistry and photobiology

authors： Quindt MI,Gola GF,Ramirez JA,Bonesi SM

更新日期：2021-01-01 00:00:00

abstract：:Syntheses for the new photosensitizers HOSiPcOSi(CH3)2(CH2)3N(CH1)1 or 3(CH3)2, Pc 34 and Pc 25, have been developed and the order of activity of these photosensitizers and the previously reported photosensitizer Pc 4, HOSiPcOSi(CH3)2(CH2)3N(CH3)2, in the dark and with broad-band red light toward Plasmodium falciparum...

journal_title：Photochemistry and photobiology

authors： Zhao XJ,Lustigman S,Li YS,Kenney ME,Ben-Hur E

更新日期：1997-08-01 00:00:00

abstract：:2-Aminoacetophenone (AAP) was recognized as the key compound for the so-called untypical aging off-flavor (UTA) in Vitis vinifera wines. In this study, it was shown that AAP can be formed by photooxidation of free and protein-bound tryptophan (TRP) in combination with a subsequent storage in model wine. Solutions of T...

journal_title：Photochemistry and photobiology

authors： Horlacher N,Schwack W

更新日期：2014-11-01 00:00:00

abstract：:Nucleotide excision repair and the ATR-mediated DNA damage checkpoint are two critical cellular responses to the genotoxic stress induced by ultraviolet (UV) light and are important for cancer prevention. In vivo genetic data indicate that these global responses are coupled. Aziz Sancar et al. developed an in vitro co...

journal_title：Photochemistry and photobiology

authors： Lindsey-Boltz LA

更新日期：2017-01-01 00:00:00

abstract：:Excessive exposure of solar ultraviolet (UV) radiation, particularly its UV-B component, to humans causes many adverse effects that include erythema, hyperplasia, hyperpigmentation, immunosuppression, photoaging and skin cancer. In recent years, there is increasing use of botanical agents in skin care products. Pomegr...

journal_title：Photochemistry and photobiology

authors： Afaq F,Malik A,Syed D,Maes D,Matsui MS,Mukhtar H

更新日期：2005-01-01 00:00:00

abstract：:All-trans retinoic acid (ATRA) plays essential roles in the normal biological processes and the treatment of cancer and skin diseases. Considering its photosensitive property, many studies have been focused on the photochemistry of ATRA. In this study, we investigated the transient phenomena in the laser flash photoly...

journal_title：Photochemistry and photobiology

authors： Li K,Wang M,Wang T,Sun D,Zhu R,Sun X,Wu X,Wang SL

更新日期：2013-09-01 00:00:00

abstract：:Photo-Fries rearrangements of 4-dodecylphenyl phenylacetate have been investigated in polyethylene films with 0-71% crystallinity and in hexane over a range of temperatures. The results are compared to those reported previously from phenyl phenylacetate and 1-naphthyl tetradecanoate to assess the influence of a long a...

journal_title：Photochemistry and photobiology

authors： Luo C,Passin P,Weiss RG

更新日期：2006-01-01 00:00:00