abstract：:Photodynamic therapy (PDT) of solid tumors elicits a strong, acute inflammatory response characterized by a rapid and massive infiltration of activated neutrophils into the tumor. The present study investigated the impact of PDT on the systemic and local (treatment site) kinetics of neutrophil trafficking and activity...

journal_title：Photochemistry and photobiology

authors： Cecic I,Parkins CS,Korbelik M

更新日期：2001-11-01 00:00:00

abstract：:Leaf discs, enclosed in a photoacoustic (PA) chamber, generate two types of PA gas-uptake signals under certain conditions. Type I is manifested by a severe signal decrease that develops slowly under very low-light intensity and often reaches negative values. It is partially reversed by low-intensity far-red light. Ty...

journal_title：Photochemistry and photobiology

authors： Malkin S,Havaux M

更新日期：2001-10-01 00:00:00

abstract：:Under physiological conditions B-form DNA is an exceedingly stable structure. However, experimental evidences obtained through nuclear magnetic resonance and fluorescence anisotropy suggest that the structure of the double helix fluctuates substantially. We describe photoacoustic phase modulation frequency measurement...

journal_title：Photochemistry and photobiology

authors： Bugs MR,Cornélio ML

更新日期：2001-10-01 00:00:00

abstract：:A noninvasive in situ fluorescence-based method for the quantification of the photosensitizer chloroaluminum disulfonated phthalocyanine was compared to the highly accurate but nonreal time ex vivo spectrofluorometry method. Our in vivo fluorescence technique is designed to allow real-time assessment of photosensitize...

journal_title：Photochemistry and photobiology

authors： Lee CC,Pouge BW,Strawbridge RR,Moodie KL,Bartholomew LR,Burke GC,Hoopes PJ

更新日期：2001-09-01 00:00:00

abstract：:Photolysis of 6-chloro-1,3-dimethyluracil and mesitylene in the presence of trifluoroacetic acid (TFA) at low temperature gave 1,3,5,7,9- and 1,3,6,8,10-pentamethylcyclooctapyrimidine-2,4-diones (1b, 1c). Sequential photoreaction of the former (1b) resulted in the formation of 9,11-diazapentacyclo[6.4.0.0(1,3).0(2,5)....

journal_title：Photochemistry and photobiology

authors： Ohkura K,Nishijima K,Seki K

更新日期：2001-09-01 00:00:00

abstract：:The in vivo pharmacokinetics of protoporphyrin IX (PpIX) after administration of 5-aminolevulinic acid (ALA) cannot be described accurately by mathematical models using first-order rate processes. We have replaced first-order reaction rates by dose-dependent (Michaelis-Menten [MM]) reaction rates in a mathematical com...

journal_title：Photochemistry and photobiology

authors： Aalders MC,van der Vange N,Star WM,Sterenborg HJ

更新日期：2001-08-01 00:00:00

abstract：:In an attempt to develop an efficient chemotherapeutic agent targeted at malignant cells that express receptors to gonadotropin releasing hormone (GnRH) we coupled [D-Lys6]GnRH covalently to an emodin derivative, i.e. emodic acid (Emo) to yield [D-Lys6(Emo)]GnRH. Emodin is a naturally occurring anthraquinone which is ...

journal_title：Photochemistry and photobiology

authors： Rahimipour S,Bilkis I,Péron V,Gescheidt G,Barbosa F,Mazur Y,Koch Y,Weiner L,Fridkin M

更新日期：2001-08-01 00:00:00

abstract：:In the present study, hypericin analogs with an increased hydrophilic character were synthesized. As chemical modifications alter the lipophilicity/hydrophilicity balance together with the photophysical/chemical background of the molecule the influence of these structural changes on the cellular uptake, retention and ...

journal_title：Photochemistry and photobiology

authors： Delaey EM,Obermuëller R,Zupkó I,De Vos D,Falk H,de Witte PA

更新日期：2001-08-01 00:00:00

abstract：:Self-aggregation of naturally occurring bacteriochlorophyll (BChl)-e in nonpolar organic solvents was investigated by visible absorption, fluorescence emission and circular dichroism spectra. Cultured brown-colored photosynthetic bacteria have several BChl-e as light-harvesting antenna pigments. Three major BChl-e hom...

journal_title：Photochemistry and photobiology

authors： Saga Y,Matsuura K,Tamiaki H

更新日期：2001-07-01 00:00:00

abstract：:Strawberry (Fragaria ananassa) fruit size and flavor are important to both growers and consumers. Plastic mulches are frequently used in raised-bed culture to conserve water, control weeds with less herbicides, keep fruit clean and produce ripe berries earlier in the season. The most commonly used plastic mulch color ...

journal_title：Photochemistry and photobiology

authors： Kasperbauer MJ,Loughrin JH,Wang SY

更新日期：2001-07-01 00:00:00

abstract：:A novel laser system has been developed to study the effects of multiple laser pulses of differing wavelengths on cutaneous blood vessels in vivo, using the hamster dorsal skin flap preparation and in vitro, using cuvettes of whole or diluted blood. The system permits sequenced irradiation with well-defined intrapulse...

journal_title：Photochemistry and photobiology

authors： Barton JK,Frangineas G,Pummer H,Black JF

更新日期：2001-06-01 00:00:00

abstract：:C-Phycocyanin (PC) trimers associated with linker polypeptides were isolated from the phycobilisome (PBS) rods of Synechococcus sp. PCC 7002. LXY refers to a linker polypeptide (L) having an apparent mass of Y kDa, located at position X in the phycobilisome where X can be R (rod), C (core) or RC (rod-core junction). M...

journal_title：Photochemistry and photobiology

authors： Pizarro SA,Sauer K

更新日期：2001-05-01 00:00:00

abstract：:Near-ultraviolet light (UVA: 320-400 nm) constitutes a major part of sunlight UV. It is important to know the effect of UVA on the biological activities of organisms on the earth. We have previously reported that black light induces somatic-cell mutation in Drosophila larvae. To investigate which wavelength of the UVA...

journal_title：Photochemistry and photobiology

authors： Negishi T,Nagaoka C,Hayatsu H,Suzuki K,Hara T,Kubota M,Watanabe M,Hieda K

更新日期：2001-05-01 00:00:00

abstract：:Ultraviolet radiation can inhibit immune responses locally as well as systemically. Such effects have been measured in animals and humans exposed to ultraviolet B (wavelength 280-315 nm) (UVB) and ultraviolet A (315-400 nm) (UVA). The precise wavelength dependence is important for the identification of possible molecu...

journal_title：Photochemistry and photobiology

authors： Garssen J,de Gruijl F,Mol D,de Klerk A,Roholl P,Van Loveren H

更新日期：2001-04-01 00:00:00

abstract：:A careful study of the linoleic acid hydroperoxide (LOOH) profile obtained upon peroxidation of linoleic acid (LA) photosensitized by tiaprofenic acid (TPA) and analogous ketones has been undertaken to distinguish between type-I and type-II photoperoxidation mechanisms. 1,4-Cyclohexadiene and 1,2-dimethylcyclohexa-2,5...

journal_title：Photochemistry and photobiology

authors： Samadi A,Martínez LA,Miranda MA,Morera IM

更新日期：2001-04-01 00:00:00

abstract：:Proteases like urokinase-type plasminogen activator (uPA) play an important role in tumor invasion. Cells derived from ultraviolet radiation (UVR)-induced corneal sarcomas of Monodelphis domestica produce relatively high levels of uPA compared to the untransformed keratocytes suggesting a mechanism for their invasiven...

journal_title：Photochemistry and photobiology

authors： Green WB,McGuire PG,Miska KB,Kusewitt DF

更新日期：2001-03-01 00:00:00

abstract：:The energy and oscillator strength of electronic transitions of chlorophyll (Chl)-amino acid complexes were calculated by using molecular orbital methods. The energies varied widely with coordinated amino acids and the difference between the maximum and minimum energy was about 830 cm-1. This energy difference was com...

journal_title：Photochemistry and photobiology

authors： Nishigaki A,Ohshima S,Nakayama K,Okada M,Nagashima U

更新日期：2001-03-01 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：:Continuous red light controls starch degradation in turions of Spirodela polyrhiza [Dölger, K., U. K. Tirlapur and K.-J. Appenroth [1997] Photochem. Photobiol. 66, 126-127 (1997)]. This light could be replaced by repeated red light pulses with the reciprocity law fulfilled over a large range of fluence rates. The effe...

journal_title：Photochemistry and photobiology

authors： Appenroth KJ,Gabrys H

更新日期：2001-01-01 00:00:00

abstract：:A fluorescence titration method was applied for the determination of pKa of ciprofloxacin (CPX) in solution. Values of 6.18 +/- 0.05 and 8.76 +/- 0.03 were obtained for pKa1 and pKa2, respectively. The method was used to determine the ionization constants in the presence of liposomes of dipalmitoylphosphatidylcholine ...

journal_title：Photochemistry and photobiology

authors： Vázquez JL,Berlanga M,Merino S,Domènech O,Viñas M,Montero MT,Hernández-Borrell J

更新日期：2001-01-01 00:00:00

abstract：:Normal hematopoietic progenitor cells from 129S6/SvEv mice are substantially less sensitive to Merocyanine 540 (MC540)-mediated photodynamic therapy (PDT) than hematopoietic progenitors from sex- and age-matched C57BL/6 mice. When exposed to a combination of MC540 and light commonly used for the extracorporeal purging...

journal_title：Photochemistry and photobiology

authors： Tsujino I,Sieber F

更新日期：2000-12-01 00:00:00

abstract：:The octahedral rhodium complex, cis-dichloro bis(1,10 phenanthroline)rhodium(III) chloride (BISPHEN), is known to form covalent linkages with DNA involving the attachment of the metal to a base. In order to determine the sequence selectivity of this chemistry, solutions of the complex containing one of the double-stra...

journal_title：Photochemistry and photobiology

authors： Morrison H,Harmon H

更新日期：2000-12-01 00:00:00

abstract：:The proton channels of the bacteriorhodopsin (BR) proton pump contain bound water molecules. The channels connect the purple membrane surfaces with the protonated retinal Schiff base at the membrane center. Films of purple membrane equilibrated at low relative humidity display a shift of the 570 nm retinal absorbance ...

journal_title：Photochemistry and photobiology

authors： Renthal R,Gracia N,Regalado R

更新日期：2000-11-01 00:00:00

abstract：:Herpes simplex virus (HSV) normally causes vescular lesions on mucocutaneous surfaces but can also cause encephalitis. The virus can reactivate from the latent state in neurons to form recrudescent lesions. One common stimulus for reactivation is exposure to sunlight. In the present study, the effects of irradiating r...

journal_title：Photochemistry and photobiology

authors： Garssen J,van der Molen R,de Klerk A,Norval M,van Loveren H

更新日期：2000-11-01 00:00:00

abstract：:The contribution of DNA strand breaks accumulating in the course of nucleotide excision repair to upregulation of the p53 tumor suppressor protein was investigated in human dermal fibroblast strains after treatment with 254 nm ultraviolet (UV) light. For this purpose, fibroblast cultures were exposed to UV and incubat...

journal_title：Photochemistry and photobiology

authors： Enns L,Murray D,Mirzayans R

更新日期：2000-10-01 00:00:00

abstract：:This research examines the behavior of ground-level solar UV radiation as measured by eight broadband meters in the continental United States during the period from late 1994 to late 1998. The goal is to define the variability that occurs in UV irradiance over time scales ranging from one to several years. The monthly...

journal_title：Photochemistry and photobiology

authors： Frederick JE,Slusser JR,Bigelow DS

更新日期：2000-10-01 00:00:00

abstract：:During the past several years there has been debate about the origins of nonexponential intensity decays of intrinsic tryptophan (trp) fluorescence of proteins, especially for single tryptophan proteins (STP). In this review we summarize the data from diverse sources suggesting that time-dependent spectral relaxation ...

journal_title：Photochemistry and photobiology

authors： Lakowicz JR

更新日期：2000-10-01 00:00:00

abstract：:Time-resolved reflectance and transmittance spectroscopy was applied to measure in vivo the absorption and transport scattering spectra of the female breast from 610 to 1010 nm. Three measurement configurations were used to probe different breast regions, and data were collected two or three times in each of the five ...

journal_title：Photochemistry and photobiology

authors： Cubeddu R,D'Andrea C,Pifferi A,Taroni P,Torricelli A,Valentini G

更新日期：2000-09-01 00:00:00

abstract：:We performed in situ experiments during the austral summer of 1998 to quantify the mortality of the fresh-water copepod Boeckella gracilipes as a function of the UV dose. The copepods were exposed to solar radiation at the water-surface for approximately 24-34 h. Long-pass cut-off filters (Schott) were used in the exp...

journal_title：Photochemistry and photobiology

authors： Tartarotti B,Cravero W,Zagarese HE

更新日期：2000-09-01 00:00:00

abstract：:We have tested the hypothesis that exposure to ultraviolet light would inhibit T helper-1 (Th1) responses and stimulate T helper-2 (Th2) responses, and that thus in a mouse model of allergic (i.e. extrinsic) asthma (using ovalbumin [OVA] as the allergen) increased symptoms would be observed, while in a model of Th1-de...

journal_title：Photochemistry and photobiology

authors： Van Loveren H,Boonstra A,Van Dijk M,Fluitman A,Savelkoul HF,Garssen J

更新日期：2000-08-01 00:00:00

abstract：:A spectral resolution procedure was used to resolve the absorption, excitation and emission spectra of the fluorescein monoanion in a number of solvent-water mixtures. This permitted an analysis of the effect of the solvent environment on the spectral properties of the monoanion and on the lactone/monoanion/dianion tr...

journal_title：Photochemistry and photobiology

authors： Klonis N,Sawyer WH

更新日期：2000-08-01 00:00:00

abstract：:Raman spectroscopy (RS) has potential for disease classification within the gastrointestinal tract (GI). A near-infrared (NIR) fiber-optic RS system has been developed previously. This study reports the first in vivo Raman spectra of human gastrointestinal tissues measured during routine clinical endoscopy. This was a...

journal_title：Photochemistry and photobiology

authors： Shim MG,Song LM,Marcon NE,Wilson BC

更新日期：2000-07-01 00:00:00

abstract：:A model of UV-induced DNA damage in oceanic bacterioplankton was developed and tested against previously published and novel measurements of cyclobutane pyrimidine dimers (CPD) in surface layers of the ocean. The model describes the effects of solar irradiance, wind-forced mixing of bacterioplankton and optical proper...

journal_title：Photochemistry and photobiology

authors： Huot Y,Jeffrey WH,Davis RF,Cullen JJ

更新日期：2000-07-01 00:00:00

abstract：:Although histochemical and immunohistochemical methods are the standard procedures in diagnosis of lymphoproliferative disorders, useful improvements in evidencing histopathologic manifestations can be obtained with the introduction of tissue autofluorescence analyses. We used microspectrofluorometry and a Multispectr...

journal_title：Photochemistry and photobiology

authors： Rigacci L,Alterini R,Bernabei PA,Ferrini PR,Agati G,Fusi F,Monici M

更新日期：2000-06-01 00:00:00

abstract：:A polyclonal, multispecific antiserum was raised against a whole 3[(3-cholamidopropyl)-dimethylammonio]-1-propanesulfonate-extract of nonirradiated Blepharisma japonicum cells. It was used to reveal the composition of solutions that were hypothesized to contain the photoreceptor of the ciliate. A Bio-Gel A 1.5 m fine ...

journal_title：Photochemistry and photobiology

authors： Podestà A,Gioffré D,Grossi T,Montagnoli G

更新日期：2000-05-01 00:00:00

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：:The decay processes of the lowest excited singlet and triplet states of five heteropsoralens (HPS) were investigated by steady-state and shift-phase fluorometry and by laser-flash photolysis in different solvents. The emission spectra of HPS are detectable only in trifluoroethanol (TFE), where fluorescence lifetimes (...

journal_title：Photochemistry and photobiology

authors： Aloisi GG,Elisei F,Moro S,Miolo G,Dall'Acqua F

更新日期：2000-05-01 00:00:00

abstract：:alpha-Crystallin, a major protein of the mammalian lens, plays a vital role in maintaining the structural stability and transparency of the lens. It performs this function through chaperone-like activity; it has recently been reported that heating alpha-crystallin enhances this ability. The present studies, using both...

journal_title：Photochemistry and photobiology

authors： Mandal K,Dillon J,Gaillard ER

更新日期：2000-04-01 00:00:00

abstract：:The photophysical properties of Piroxicam, a nonsteroidal anti-inflammatory drug (NSAID), were investigated at different pHext values in reversed micelles of Aerosol-OT (AOT) in iso-octane, using both steady-state and picosecond time-resolved fluorescence spectroscopy. In contrast with the very complex data obtained i...

journal_title：Photochemistry and photobiology

authors： Andrade SM,Costa SM,Pansu R

更新日期：2000-04-01 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