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Journal of Photochemistry and Photobiology. B, Biology

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https://www.readbyqxmd.com/read/28212518/zno-tio2-composites-for-photocatalytic-inactivation-of-escherichia-coli
#1
Diptipriya Sethi, Ramasamy Sakthivel
ZnO/TiO2 composite was synthesized from zinc nitrate and anatase TiO2 by using the incipient wet impregnation method followed by calcination at 350°C for 3h. These samples were characterized through several characterization techniques. XRD peaks confirms the presence of single anatase phase of titania in the 3 and 6wt% ZnO/TiO2 composite, whereas in all other composites both anatase titania and zinc oxide phases were found. UV-visible (diffuse) reflectance spectra show titania and ZnO absorbs in the ultraviolet (UV) region whereas ZnO/TiO2 absorbs both UV and visible light...
February 11, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28212517/phytoremediation-of-dyes-using-lagerstroemia-speciosa-mediated-silver-nanoparticles-and-its-biofilm-activity-against-clinical-strains-pseudomonas-aeruginosa
#2
V Sai Saraswathi, Neethu Kamarudheen, K V BhaskaraRao, K Santhakumar
The aim of this study was to prepare silver nanoparticles by a green method using the aqueous leaves extract of Lagerstroemia speciosa. The prepared silver nanoparticles were characterized, studied for its photocatalytic and biofilm inhibition studies. The maximum absorbance peak was found at 427nm and thus confirming the formation of silver nanoparticles. The average size of silver nanoparticles synthesized was found to be 12nm using XRD and it was spherical in shape. The nanoparticles synthesized was investigated for photocatalytic activity for to two different dye molecules, methyl orange and methylene blue showing 310 and 290min degradation time respectively...
February 10, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28214719/host-guest-interaction-of-3-hydroxyflavone-and-7-hydroxyflavone-with-cucurbit-7-uril-a-spectroscopic-and-calorimetric-approach
#3
Sayeed Ashique Ahmed, Banibrata Maity, Soma Seth Duley, Debabrata Seth
The modulation of photophysical behaviour of small organic molecules in the presence of macrocycles is one of the most interesting areas of research. In this work we reported the interaction of two biologically active molecules 3-hydroxyflavone and 7-hydroxyflavone with macrocyclic host cucurbit [7]uril in aqueous medium. To investigate the change of photophysical properties of these two flavones, we have used steady state absorption, fluorescence, time resolved fluorescence emission spectroscopy and isothermal titration calorimetric technique...
February 9, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28189845/synthesis-dna-binding-and-in-vitro-cytotoxicity-studies-on-novel-bis-pyrazoles
#4
K Indrasena Reddy, C Aruna, M Manisha, K Srihari, K Sudhakar Babu, V Vijayakumar, S Sarveswari, R Priya, A Amrita, R Siva
A new series of bis-pyrazoles 6a-t were synthesized from 3,5-dimethyl pyrazole using sequential approach. All these compounds were characterized by IR, (1)H NMR, (13)C NMR and mass spectral data. The interaction of newly synthesized bis-pyrazoles with DNA was investigated through molecular docking and absorption spectroscopic technique. Among all bis-pyrazoles compounds, the 6h compound showed lower conformational energy through in silico analysis. The interaction of each molecule in this series 6a-t with the various concentrations of DNA was examined through the UV-visible spectroscopic studies...
February 7, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28214718/alkyl-substituent-effect-on-photosensitized-inactivation-of-escherichia-coli-by-pyridinium-bonded-p-porphyrins
#5
Jin Matsumoto, Yusaku Suemoto, Hiroki Kanemaru, Kyosuke Takemori, Masato Shigehara, Akari Miyamoto, Haruhiko Yokoi, Masahide Yasuda
Activity of singlet oxygen sensitizers for photoinactivation of bacteria and photodynamic therapy of tumor cells has been evaluated using nonpathogenic model cells, such as Escherichia coli, Saccharomyces cerevisiae, and HeLa cells. Among them, E. coli, gram-negative bacterium, has complex membrane structures in the cell wall, resulting in an impermeable barrier to antimicrobial agents. Therefore, few singlet oxygen sensitizers have photoinactivation activities toward E. coli at low concentrations. Recently polycationic porphyrins have received much attention as a new type of singlet oxygen sensitizers because they have strong binding affinities for DNA and proteins...
February 6, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28199905/spontaneous-ultra-weak-photon-emission-in-correlation-to-inflammatory-metabolism-and-oxidative-stress-in-a-mouse-model-of-collagen-induced-arthritis
#6
Min He, Eduard van Wijk, Herman van Wietmarschen, Mei Wang, Mengmeng Sun, Slavik Koval, Roeland van Wijk, Thomas Hankemeier, Jan van der Greef
The increasing prevalence of rheumatoid arthritis has driven the development of new approaches and technologies for investigating the pathophysiology of this devastating, chronic disease. From the perspective of systems biology, combining comprehensive personal data such as metabolomics profiling with ultra-weak photon emission (UPE) data may provide key information regarding the complex pathophysiology underlying rheumatoid arthritis. In this article, we integrated UPE with metabolomics-based technologies in order to investigate collagen-induced arthritis, a mouse model of rheumatoid arthritis, at the systems level, and we investigated the biological underpinnings of the complex dataset...
February 3, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28189068/passiflora-tarminiana-fruits-reduce-uvb-induced-photoaging-in-human-skin-fibroblasts
#7
Karent Bravo, Luisa Duque, Federico Ferreres, Diego A Moreno, Edison Osorio
Skin aging is a complex process that is strongly affected by UV radiation, which stimulates the production of reactive oxygen species (ROS) in the epidermis and dermis and subsequently causes skin damage. Among the major consequences are increased collagen degradation and reduced collagen synthesis. Previous reports have demonstrated the beneficial effects of polyphenols for healthy skin. Passiflora tarminiana Coppens & V.E. Barney, a species of the Passifloraceae family, is widely distributed in South America and is rich in flavonoids...
February 3, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28187402/effect-of-thai-banana-musa-aa-group-in-reducing-accumulation-of-oxidation-end-products-in-uvb-irradiated-mouse-skin
#8
Nontaphat Leerach, Swanya Yakaew, Preeyawass Phimnuan, Wichuda Soimee, Wongnapa Nakyai, Witoo Luangbudnark, Jarupa Viyoch
SCOPE: Chronic UVB exposure causes skin disorders and cancer through DNA strand breaks and oxidation of numerous functional groups of proteins and lipids in the skin. In this study, we investigated the effects of Thai banana (Musa AA group, "Khai," and Musa ABB group, "Namwa") on the prevention of UVB-induced skin damage when fed to male ICR mice. METHODS AND RESULTS: Mice were orally fed banana (Khai or Namwa) fruit pulps at dose of 1mg/g body weight/day for 12weeks...
February 2, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28187403/green-synthesis-of-silver-nanoparticle-for-the-selective-and-sensitive-colorimetric-detection-of-mercury-ii-ion
#9
Vijay Kumar, Devendra K Singh, Sweta Mohan, Daraksha Bano, Ravi Kumar Gundampati, Syed Hadi Hasan
An ecofriendly and zero cost approach has been developed for the photoinduced synthesis of more stable AgNPs using an aqueous extract of Murraya koenigii (AEM) as a reducing and stabilizing agent. The exposed reaction mixture of AEM and AgNO3 to sunlight turned dark brown which primarily confirmed the biosynthesis of AgNPs. The biosynthesis was monitored by UV-vis spectroscopy which exhibited a sharp SPR band at 430nm after 30min of sunlight exposure. The optimum conditions for biosynthesis of AgNPs were 30min of sunlight exposure, 2...
January 31, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28171808/the-water-water-cycle-is-a-major-electron-sink-in-camellia-species-when-co2-assimilation-is-restricted
#10
Yan-Fei Cai, Qiu-Yun Yang, Shu-Fa Li, Ji-Hua Wang, Wei Huang
The water-water cycle (WWC) is thought to dissipate excess excitation energy and balance the ATP/NADPH energy budget under some conditions. However, the importance of the WWC in photosynthetic regulation remains controversy. We observed that three Camellia cultivars exhibited high rates of photosynthetic electron flow under high light when photosynthesis was restricted. We thus tested the hypothesis that the WWC is a major electron sink in the three Camellia cultivars when CO2 assimilation is restricted. Light response curves indicated that the WWC was strongly increased with photorespiration and was positively correlated with extra ATP supplied from other flexible mechanisms excluding linear electron flow, implying that the WWC is an important alternative electron sink to balance ATP/NADPH energy demand for sustaining photorespiration in Camellia cultivars...
January 31, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28167273/mybs-affect-the-variation-in-the-ratio-of-anthocyanin-and-flavanol-in-fruit-peel-and-flesh-in-response-to-shade
#11
Yanfen Lu, Yufen Bu, Suxiao Hao, Yaru Wang, Jie Zhang, Ji Tian, Yuncong Yao
Fruit pigment accumulation, which represents an important indicator of nutrient quality and appearance value, is often affected by low light under rain, cloud, fog and haze conditions during the veraison period. It is not known whether continuous low light interferes with the production and accumulation of secondary metabolites in veraison fruit. In this paper, we measured pigments and the transcriptional level of genes related to secondary metabolites, i.e., flavonoid biosynthesis in the peel and flesh of Malus crabapple 'Radiant' fruit in response to normal light and shade from 10th July to 30th August...
January 31, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28161653/low-level-laser-therapy-lllt-accelerates-the-sternomastoid-muscle-regeneration-process-after-myonecrosis-due-to-bupivacaine
#12
Cristiane Neves Alessi Pissulin, Ana Angélica Henrique Fernandes, Alejandro Manuel Sanchez Orellana, Renata Calciolari Rossi E Silva, Selma Maria Michelin Matheus
BACKGROUND: Because of its long-lasting analgesic action, bupivacaine is an anesthetic used for peripheral nerve block and relief of postoperative pain. Muscle degeneration and neurotoxicity are its main limitations. There is strong evidence that low-level laser therapy (LLLT) assists in muscle and nerve repair. The authors evaluated the effects of a Gallium Arsenide laser (GaAs), on the regeneration of muscle fibers of the sternomastoid muscle and accessory nerve after injection of bupivacaine...
January 26, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28161652/in-vitro-antimicrobial-activity-of-led-irradiation-on-pseudomonas-aeruginosa
#13
Morena Petrini, Paolo Trentini, Domenico Tripodi, Giuseppe Spoto, Simonetta D'Ercole
Pseudomonas aeruginosa is an opportunistic pathogen responsible of many deaths due to nosocomial pneumonia each year. It is particularly resistant to many different classes of antibiotics and disinfectants. For all these reasons, there is the necessity to find novel approaches of treatment. The aim of this study was to evaluate the effect of 880nm light emitting diodes (LED) irradiation on P. aeruginosa, in vitro. Different LED irradiation parameters (time, energy output and the addition of methylene blue and chlorhexidine) have been tested in order to evaluate the effects on this bacterium...
January 24, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28147303/characterization-of-the-therapeutic-properties-of-chinese-herbal-materials-by-measuring-delayed-luminescence-and-dendritic-cell-based-immunomodulatory-response
#14
Mengmeng Sun, Wen-Te Chang, Eduard Van Wijk, Min He, Slavik Koval, Ming-Kuem Lin, Roel Van Wijk, Thomas Hankemeier, Jan van der Greef, Mei Wang
Based on the traditional Chinese medicine theory, the Chinese pharmacopeia assigns a therapeutic description of "taste" to all herbs; thus, an herb's "taste" is valued in traditional Chinese medicine as a major ethnopharmacological category and reflects the herb's therapeutic properties. These properties guide the practitioner with respect to preparing a specific herbal formula in order to provide each patient with a personalized intervention. The key challenge in evidence-based medicine is to characterize herbal therapeutic properties from a multi-target, multi-dimensional systems pharmacology perspective...
January 22, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28122667/corrigendum-to-recent-advances-in-ruthenium-complex-based-light-driven-water-oxidation-catalysts-j-photochem-photobiol-b-152-2015-95-105
#15
Long-Xin Xue, Ting-Ting Meng, Wei Yang, Ke-Zhi Wang
No abstract text is available yet for this article.
January 22, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28152388/spectral-characterization-and-antibacterial-activity-of-an-isolated-compound-from-memecylon-edule-leaves
#16
R Srinivasan, D Natarajan, M S Shivakumar
Memecylon edule Roxb. (Melastamataceae family) is a small evergreen tree reported as having ethnobotanical and pharmacological properties. The present study was aimed to investigate the spectral characterization and antibacterial activity of isolated pure compound (3β-hydroxyurs-12-en-28-oic acid (ursolic acid)) from Memecylon edule leaves by performing bioassay guided isolation method. The structure derivation of isolated compound was done by different spectral studies like UV, FT-IR, LC-MS, CHNS analysis, 1D ((1)H, (13)C and DEPT-135) and 2D-NMR (HSQC and HMBC), respectively...
January 21, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28135574/effect-of-nd-yag-laser-assisted-non-surgical-mechanical-debridement-on-clinical-and-radiographic-peri-implant-inflammatory-parameters-in-patients-with-peri-implant-disease
#17
Tariq Abduljabbar, Fawad Javed, Sergio Varela Kellesarian, Fahim Vohra, Georgios E Romanos
BACKGROUND AND AIM: The efficacy of neodymium-doped yttrium aluminium garnet (Nd:YAG) laser-assisted non-surgical mechanical debridement (MD) in the treatment of periimplant diseases remains uninvestigated. The aim was to assess the efficacy of Nd:YAG laser-assisted non-surgical MD on clinical and radiographic periimplant inflammatory parameters in patients with periimplant disease. METHODS: Treatment wise, 63 male patients with periimplant diseases were divided into 2 groups: Group-1 (32 patients): treatment of periimplant disease using MD alone (control group); and Group-2 (n=31 patients): treatment of periimplant disease using MD with a single application of Nd:YAG laser...
January 21, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28135573/retinal-venous-blood-carbon-monoxide-response-to-bright-light-in-male-pigs-a-preliminary-study
#18
Dan A Oren, Magdalena Duda, Katarzyna Kozioł, Maria Romerowicz-Misielak, Anna Koziorowska, Przemysław Sołek, Sławomir Nowak, Magdalena Kulpa, Marek Koziorowski
The physical mechanism by which light is absorbed in the eye and has antidepressant and energizing effects in Seasonal Affective Disorder and other forms of psychiatric major depression is of scientific interest. This study was designed to explore one specific aspect of a proposed humoral phototransduction mechanism, namely that carbon monoxide (CO) levels increase in retinal venous blood in response to bright light. Eleven mature male pigs approximately six months of age were kept for 7days in darkness and fasted for 12h prior to surgery...
January 21, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28122297/allosteric-inhibition-of-topoisomerase-i-by-pinostrobin-molecular-docking-spectroscopic-and-topoisomerase-i-activity-studies
#19
Alka Jadaun, N Subbarao, Aparna Dixit
Cancer, the second major cause of mortality trailing the cardiovascular diseases, is a multifactorial heterogeneous disease and growing public health problem worldwide. Owing to severe adverse effects of currently available therapies, there is a growing interest in natural compounds present in our daily diet. Among various natural products, flavonoids-polyphenolic compounds have attracted much attention and have been well-documented for their biological activities. Some flavonoids may inhibit cancer cell proliferation by modulating the action of different enzymes and signal transduction pathways...
January 12, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28129629/hepatoprotective-effect-of-engineered-silver-nanoparticles-coated-bioactive-compounds-against-diethylnitrosamine-induced-hepatocarcinogenesis-in-experimental-mice
#20
Prasannaraj Govindaraj, Venkatachalam Perumal
Nanoparticle based drug delivery can rapidly improves the therapeutic potential of anti-cancer agents. The present study focused to evaluate the hepatoprotective activity of silver nanoparticles (AgNPs) synthesized using aqueous extracts of Andrographis paniculata leaves (ApAgNPs) and Semecarpus anacardium nuts (SaAgNPs) against diethylnitrosamine (DEN) induced liver cancer in mice model. The physico-chemical properties of synthesized AgNPs were characterized by Fourier transform infrared (FTIR) spectroscopy, Transmission Electron Microscopy (TEM), Selected Area Electron Diffraction (SAED), X-ray Diffraction (XRD), Energy Dispersive X-ray (EDX) spectrum, Zeta potential and Dynamic Light Scattering (DLS) analysis...
January 10, 2017: Journal of Photochemistry and Photobiology. B, Biology
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