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Journal of Photochemistry and Photobiology. B, Biology

Rosilene Cristina Rossetto Burgos, Wei Zhang, Eduard P A van Wijk, Thomas Hankemeier, Rawi Ramautar, Jan van der Greef
Recently, ultra-weak photon emission (UPE) was developed as a novel tool for measuring oxidative metabolic processes, as its generation is related to reactive oxygen species (ROS). Both an imbalance in ROS or the uncontrolled production of ROS can lead to oxidative stress, which is commonly associated with many diseases. In addition to playing several biological functions, the thiol amino acid glutathione has an important antioxidant function in the body's defense against ROS. Specifically, glutathione is an important endogenous antioxidant that helps maintain oxidant levels...
September 7, 2017: Journal of Photochemistry and Photobiology. B, Biology
Somanshu Banerjee, Chandra Mohini Chaturvedi
Birds time their daily and seasonal activities in synchronization with circadian and annual periodicities in the environment, which is mainly provided by changes in photoperiod/day length conditions. Photoperiod appears to act at the level of eye, pineal and encephalic/deep brain photoperception and thus entrain the hypothalamic clock as well as reproductive circuitry in different avian species. In this article our focus of study is to elucidate out the underlying molecular mechanism of modulation of the hypothalamic reproductive circuitry following the photoperception through the hypothalamic photoreceptor cells and the subsequent alteration in the reproductive responses in quail, kept under different simulated photoperiodic conditions...
September 7, 2017: Journal of Photochemistry and Photobiology. B, Biology
Maryam R Al Shehhi, Imen Gherboudj, Hosni Ghedira
Mapping of Chlorophyll-a (Chl-a) over the coastal waters of the Arabian Gulf and the Sea of Oman using the satellite-based observations, such as MODIS (Moderate Resolution Imaging Spectro-radiometer), has shown inferior performance (Chl-a overestimation) than that of deep waters. Studies in the region have shown that this poor performance is due to three reasons: (i) water turbidity (sediments re-suspension), and the presence of colored dissolved organic matter (CDOM), (ii) bottom reflectance and (iii) incapability of the existing atmospheric correction models to reduce the effect of the aerosols from the water leaving radiance...
September 6, 2017: Journal of Photochemistry and Photobiology. B, Biology
Trishna Pani, Anamika Das, Jabez Williams Osborne
Industrialization has led to the disposal of a massive amount of heavy metals every year, showing perilous effects on humans, marine life and agricultural products. There are numerous chemical and biological approaches available but their implementation is limited due to high cost and low efficiency. Therefore, the present study was focused on the biofilm- based bioremoval of heavy metals (zinc and manganese) using indigenous bacteria isolated from the tannery sludge obtained from Ranipet, Tamil Nadu. The effective isolate was capable of tolerating up to 2000mg/L of zinc and manganese and was further used for development of biofilm on the peels of Cucumis sativus...
September 6, 2017: Journal of Photochemistry and Photobiology. B, Biology
Lilit Gabrielyan, Lusine Hakobyan, Armen Trchounian
Nowadays, hydrogen (H2) production by green microalgae seems to be a very perspective, as stocks of water and solar energy are practically inexhaustible and renewable. The aim of this study was the optimization of conditions (organic carbon sources and lighting regime), which can provide light-dependent H2 production by green microalga Parachlorella kessleri RA-002 newly isolated in Armenia. The results indicated that carbon sources and lighting regimes affected H2 production. In the presence of used carbon sources H2 production was observed, but the highest yield of H2 was obtained in the presence of acetate...
September 6, 2017: Journal of Photochemistry and Photobiology. B, Biology
Rafaella Caroline Bernardi, Ellen Liciane Barbosa Firmino, Angelica Mendonça, Denise Sguarizi-Antonio, Márlon César Pereira, Luis Humberto da Cunha Andrade, William Fernando Antonialli-Junior, Sandro Marcio Lima
Studies of venomous animals have shown that environmental and genetic factors contribute to determining the chemical composition of venom. It is well known that external effects cause differences in the toxicity, concentration, and prey specificity of venom. However, the influence of different factors on the chemical profile of Hymenoptera venom remains little explored. In view of this, the aim of this study was to evaluate intraspecific differences and the influence of diet on the chemical profile of Ectatomma brunneum venom using Fourier transform infrared photoacoustic spectroscopy...
September 6, 2017: Journal of Photochemistry and Photobiology. B, Biology
Ranju Prasad Mandal, Gunjan Mandal, Sudeshna Sarkar, Arindam Bhattacharyya, Swati De
Silver nanoparticles (AgNPs) have been synthesized in situ in micelles formed by the bile salt sodium deoxycholate (NaDC). The AgNPs exhibit "green" fluorescence. It has been shown in the present study that they can disrupt the components of gall stones/pigment stones. This unique ability of the AgNPs has been observed upon detailed study of the interaction between the endobiotic pigment bilirubin (BR) and bile salt (NaDC). In addition, these AgNPs show significant cytotoxicity towards the breast cancer cells (MCF-7)...
September 5, 2017: Journal of Photochemistry and Photobiology. B, Biology
Jessica Elizabeth Philip, Muhammad Shahid, M R Prathapachandra Kurup, Mohanan Puzhavoorparambil Velayudhan
Two chromone hydrazone ligands HL1 and HL2 were synthesized and characterized by elemental analyses, IR, (1)H NMR &(13)C NMR, electronic absorption and mass spectra. The reactions of the chromone hydrazones with transition metals such as Ni, Cu, and Zn (II) salts of acetate afforded mononuclear metal complexes. Characterization and structure elucidation of the prepared chromone hydrazone metal (II) complexes were done by elemental, IR, electronic, EPR spectra and thermo gravimetric analyses as well as conductivity and magnetic susceptibility measurements...
September 5, 2017: Journal of Photochemistry and Photobiology. B, Biology
Kiran Aftab, Kalsoom Akhtar, Abida Kausar, Shazia Khaliq, Numrah Nisar, Huma Umbreen, Munawar Iqbal
Fungal biomass proves to be highly efficient for the treatment of wastewater as well as recovery of metal ions from wastewater. Present investigation was aimed to evaluate the efficiency of indigenous fungal isolates for the sequestration of Zn(II) ions aqueous solution. Among twenty five fungal isolates, Aspergillus oryzae SV/09 (AO SV/09), Aspergillus flavus NA9 (AF NA9) and Paecilomyces formosus DTO 63f4 (PF DTO-63f4) were identified by gene sequencing of ITS regions of the ribosomal DNA (rDNA). The AO SV/09, AF NA9 and PF DTO-63f4 showed promising efficiency for the biosorption of Zn(II) ions...
September 4, 2017: Journal of Photochemistry and Photobiology. B, Biology
Chung-Yu Huang, Yi-Tzu Lin, Hsiang-Chun Kuo, Wen-Fei Chiou, Mei-Hsien Lee
Ultraviolet (UV) irradiation leads to skin photoaging because of the upregulation of matrix metalloproteinase (MMP)-1 and downregulation of type I collagen and tissue inhibitor of metalloproteinase (TIMP)-1. Eriobotrya deflexa (Hemsl.) Nakai (Rosaceae) is a flowering plant endemic to Taiwan, and its leaves have been used as an expectorant and in antitussive folk remedy. Our previous studies have demonstrated that an E. deflexa leaf extract functions as a free radical scavenger. The current evaluated the antiphotoaging effect of partitioned fractions and specific compounds from the leaves of E...
September 4, 2017: Journal of Photochemistry and Photobiology. B, Biology
Xin Wang, Xue-Yuan Guo, Liang Xu, Bin Liu, Ling-Ling Zhou, Xiao-Fang Wang, Dan Wang, Ting Sun
Cleviprex is a short-acting dihydropyridine calcium channel antagonist used as an antihypertensive drug. In this work, the binding characterization of cleviprex to human serum albumin (HSA) and the competitive binding to HSA between cleviprex and two flavonoids, baicalin and rutin, were studied using multi-spectroscopic techniques and molecular docking method. The fluorescence quenching of HSA by cleviprex was initiated by the formation of HSA-cleviprex complex, which was confirmed by UV-vis spectra measurements...
September 4, 2017: Journal of Photochemistry and Photobiology. B, Biology
Xiaohan Sun, Jiang He, Shenghong Yang, Mingda Zheng, Yingying Wang, Shuang Ma, Haipeng Zheng
Green, economical and effective method was developed for synthesis of fluorescent carbon dots (CDs), using one-pot hydrothermal treatment of Lycii Fructus. Optical and structural properties of the CDs have been extensively studied by UV-visible and fluorescence spectroscopic, x-ray diffraction (XRD) techniques, transmission electron microscopy (TEM) and high resolution TEM (HRTEM). Surface functionality and composition of CDs has been illustrated by Fourier transform infrared spectroscopy (FTIR), x-ray photoelectron spectroscopy (XPS) spectra and elemental analysis...
September 1, 2017: Journal of Photochemistry and Photobiology. B, Biology
Aruppillai Suthaparan, Knut Asbjørn Solhaug, Arne Stensvand, Hans Ragnar Gislerød
Nighttime ultraviolet (UV) radiation, if applied properly, has a significant potential for management of powdery mildews in many crop species. In this study, the role of growth light duration, irradiance, a combination of both (daily light integral) and light spectral quality (blue or red) on the efficacy of UV treatments against powdery mildew caused by Podosphaera xanthii and the growth performance of cucumber plants was studied in growth chambers. Increasing daily light integral provided by high-pressure sodium lamps (HPS) decreased efficacy of nighttime UV treatments against P...
September 1, 2017: Journal of Photochemistry and Photobiology. B, Biology
Nirmala Ganji, Vijay Kumar Chityala, Pradeep Kumar Marri, Rambabu Aveli, Vamsikrishna Narendrula, Sreenu Daravath, Shivaraj
Two new series of binary metal complexes [M(L(1))2] and [M(L(2))2] where, M=Cu(II), Ni(II) & Co(II) and L(1)=4-((3,4-dimethylisoxazol-5-ylimino)methyl)benzene-1,3-diol; L(2)=2-((3,4-dimethylisoxazol-5-ylimino)methyl)-5-methoxyphenol were synthesized and characterized by elemental analysis, (1)H NMR, (13)C NMR, FT-IR, ESI mass, UV-Visible, magnetic moment, ESR, SEM and powder XRD studies. Based on these results, a square planar geometry is assigned for all the metal complexes where the Schiff base acts as uninegatively charged bidentate chelating agent via the hydroxyl oxygen and azomethine nitrogen atoms...
August 31, 2017: Journal of Photochemistry and Photobiology. B, Biology
Somaya Z Mansour, Fatma S M Moawed, Seham M Elmarkaby
5, 7-Dihydroxyflavone (DHF), a natural plant flavonoid, have shown a variety of beneficial effects. Neurotoxic effects of acrylamide (ACR) or gamma irradiation (IR) have been established in humans and animals. The current study was designed to evaluate whether DHF could restrain ACR or IR induced neurotoxicity in rats and to explore the underlying mechanisms. The study was carried out by investigating some biochemical and biophysical parameters as well as histopathological examination. The daily oral administration of ACR (25mg/kg b...
August 30, 2017: Journal of Photochemistry and Photobiology. B, Biology
Dongyan Ouyang, Kazutaka Hirakawa
The activity for photodynamic therapy of water-soluble cationic porphyrins, tetraphenylporphyrin P(V) complexes, was investigated. Bis(cyclohexylmethoxy)P(V)tetraphenylporphyrin (DCHMP(V)TPP), dichloroP(V)tetraphenylporphyrin (Cl2P(V)TPP), and dimethoxyP(V)tetraphenylporphyrin (DMP(V)TPP) could cause the photosensitized deactivation of tyrosinase. The tryptophan residue of human serum albumin (HSA) and several kinds of amino acids could be damaged by these P(V)porphyrins under visible light irradiation. The photosensitized damage of these biomolecules was inhibited by sodium azide, a singlet oxygen ((1)O2) quencher, and enhanced in deuterium oxide, suggesting the contribution of (1)O2...
August 26, 2017: Journal of Photochemistry and Photobiology. B, Biology
P Abinaya Sindu, Elayaraja Kolanthai, R V Suganthi, K Thanigai Arul, E Manikandan, Luiz H Catalani, S Narayana Kalkura
The aim of the current study is to synthesize nanosized silicon incorporated HAp (Si-HAP) using sodium metasilicate as the silicon source. The sol-gel derived samples were further subjected to microwave irradiation. Incorporation of Si into HAp did not alter the HAp phase, as confirmed by the X-ray diffraction analysis (XRD). Moreover, variation in the lattice parameters of the Si-incorporated HAp indicates that Si is substituted into the HAp lattice. The decrease in the intensity of the peaks attributed to hydroxyl groups, which appeared in the FTIR and Raman spectra of Si-HAp, further confirms the Si substitution in HAp lattices...
August 24, 2017: Journal of Photochemistry and Photobiology. B, Biology
Gislaine Patricia de Andrade, Tania Maria Manieri, Emilene Arusievicz Nunes, Gustavo Monteiro Viana, Giselle Cerchiaro, Anderson Orzari Ribeiro
In this work we present a comparative in vitro study of photodynamic activity between hypericin (HYP) and some hypericinates (hypericin ionic pair with lysine or N-methylglucamine) in human mammary adenocarcinoma cells (MCF-7). The toxicity and phototoxicity of hypericin and hypericinates were compared, as well as their cellular uptake and localization and mutagenic, genotoxic and clonogenic capacity. Our results demonstrate that different cationic moieties promote differences in the hypericinate solubility in a biological environment, and can influence the cellular localization and the phototoxicity of the photosensitizer...
August 24, 2017: Journal of Photochemistry and Photobiology. B, Biology
Ali Fakhri, Shiva Tahami, Pedram Afshar Nejad
The Best performance drug delivery systems designed with Fe3O4-Ag2O quantum dots decorated cellulose nanofibers which that grafted with Etoposide and Methotrexate. Morphology properties were characterized by Scanning and Transmittance electron microscopy. The crystalline structure of prepared sample was evaluated using by X-ray diffraction. The vibrating sample magnetometer analysis was used for magnetic behavior of samples. The size distributions of Fe3O4-Ag2O QDs/Cellulose fibers nanocomposites indicate that the average diameter was 62...
August 24, 2017: Journal of Photochemistry and Photobiology. B, Biology
P Kurian, T O Obisesan, T J A Craddock
Oxidative stress is a pathological hallmark of neurodegenerative tauopathic disorders such as Alzheimer's disease and Parkinson's disease-related dementia, which are characterized by altered forms of the microtubule-associated protein (MAP) tau. MAP tau is a key protein in stabilizing the microtubule architecture that regulates neuron morphology and synaptic strength. When MAP tau is degraded in tauopathic disorders, neuron dysfunction results. The precise role of reactive oxygen species (ROS) in the tauopathic disease process, however, is poorly understood...
August 24, 2017: Journal of Photochemistry and Photobiology. B, Biology
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