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Journal of Photochemistry and Photobiology. B, Biology

Simona Lucioli, Chiara Di Bari, Cinzia Forni, Aldo Di Carlo, Enrique Barrajón-Catalán, Vicente Micol, Paolo Nota, Federico Teoli, Fabio Matteocci, Andrea Frattarelli, Emilia Caboni
We investigated the effect on anthocyanins and total phenols content and antioxidant capacity of in vitro shoot cultures of Vaccinium corymbosum L., cv. Brigitta Blue, grown on an eliciting medium supplied with 10 μM naphthalene acetic acid, in combination with reduced content of salts and organics in respect to the basal medium. After 45 days, higher content of total phenols and anthocyanins was obtained from extracts of shoots grown on the elicitation medium. Anthocyanin molecules, absent in control shoots, were identified by HPLC-MS as delphinidine-glycoside, cyanidine-glycoside, delphinidine-arabinoside, cyanidine- arabinoside and cyanidine-acetylglycoside...
September 6, 2018: Journal of Photochemistry and Photobiology. B, Biology
Sajan George, Michael R Hamblin, Heidi Abrahamse
Irradiation with red light or near-infrared (NIR) lasers can bio-modulate cellular processes or revitalize injured tissues and therefore, widely been used for therapeutic interventions. Mechanistically, this cellular or biological process, referred as Photobiomodulation (PBM), is achieved by the generation of oxide free radicals in cells and tissues. This explorative study using red light (636 nm) and Near Infra-Red (NIR, 825 nm) laser at various irradiation exposures reckons the level of oxidative stress induced by these free radicals in human primary fibroblasts...
September 6, 2018: Journal of Photochemistry and Photobiology. B, Biology
Apiwan Rosena, Thongchai Koobkokkruad, Waleewan Eaknai, Phichaporn Bunwatcharaphansakun, Rawiwan Maniratanachote, Sasitorn Aueviriyavit
Bombyx mori silk extracts, derived from the cocoon degumming process of draw and dye silk in the textile industry, are mainly composed of sericin protein. To add value to the Thai silk extracts, and hence the silk industry, a simple enrichment process was recently developed and the enriched silk extracts were then applied in nano-cosmeceutical products and nano-delivery systems. In this study, the protective effect of Thai silk extracts from three different strains of Bombyx mori on the drug-induced phototoxicity was evaluated in vitro using chlorpromazine (CPZ), a commonly used antipsychotic drug, as a representative phototoxic drug...
September 1, 2018: Journal of Photochemistry and Photobiology. B, Biology
Niyaz Mohammad Mahmoodi, Behzad Karimi, Mahmoud Mazarji, Hassan Moghtaderi
In this paper, cadmium selenide quantum dot (CdSe QD)-zinc oxide (ZnO) nanocomposite (CdSe QD-ZnO) was synthesized and characterized and its photocatalytic dye degradation ability was investigated. The XRD, FTIR, UV-Vis, AFM and SEM were used to characterize the synthesized nanomaterials. The correlation coefficient of pseudo-first-order kinetic reaction is 0.98. The rate constants from 20 to 30 mg/L of pollutant concentrations was reduced by the order of 0.9. The temporal change in dye concentration reduces as the photocatalyst dosage increase up to optimum value of 0...
September 1, 2018: Journal of Photochemistry and Photobiology. B, Biology
Rong Guo, Yao Du, Shi Zhang, Hong Liu, Yuming Fu
Working and living under artificial lighting environment for a long duration do not allow sufficient sunlight exposure, resulting in an adverse effect on bone. Common artificial light source, white LED light, does not include ultraviolet irradiation that plays an important role in bone metabolism. Ultraviolet supplementation in artificial lighting environment can be used to simulate the effect of sunlight irradiation on bone metabolism. In this paper, we report the effects of long-term exposure of low-dose ultraviolet irradiation on the rats' bones and skin...
August 27, 2018: Journal of Photochemistry and Photobiology. B, Biology
Vidhyapriya P, Divya D, Manimaran Bala, Sakthivel N
Carbon monoxide releasing molecules (CORMs) are organometallic/organic compounds that release carbon monoxide (CO) spontaneously or upon activation. PhotoCORMs are capable of releasing CO on light based activation. This group of molecules is used in photodynamic therapy due to their ability to release CO in a controlled manner. In the present investigation, the release of CO from [Mn(CO)3 Br(μ-bpcpd)]2 (MnCORM) upon irradiation at λmax 365 nm was assessed spectrophotometrically using myoglobin assay and confirmed by liquid FT-IR spectroscopic analysis...
August 23, 2018: Journal of Photochemistry and Photobiology. B, Biology
Abhishek Kumar Bhardwaj, Abhishek Shukla, Shweta Maurya, Subhash Chandra Singh, Kailash N Uttam, Shanthy Sundaram, Mohan P Singh, Ram Gopal
It is highly desirable to discover novel green synthesis methods for cheap and scalable synthesis of nanoparticles (NPs) to reduce the negative impact on the environment. But these approaches generally impose great challenge in controlling size, shape, and homogeneity of product NPs. Here in the present study, we report a novel approach enabling direct sunlight and oyster mushroom (Pleurotus citrinopileatus) extract for the photo-biochemical synthesis of Ag NPs. Sunlight of different wavelength was used to control the size and distribution of photo-biochemically produced NPs...
August 22, 2018: Journal of Photochemistry and Photobiology. B, Biology
T V M Sreekanth, P C Nagajyothi, P Muthuraman, G Enkhtaivan, S V P Vattikuti, C O Tettey, Doo Hwan Kim, Jaesool Shim, Kisoo Yoo
A simple, inexpensive ultra-sonication method was used to synthesize quasi spherical silver nanoparticles (AgNPs) with an aqueous extract from Panax ginseng roots. This method has the advantages of being completely eco-friendly and allows increased reaction rates, uniform dispersal of the nanoparticles in liquids, and effective breaking of aggregates. Biomolecules present in plant extracts are often used to reduce metal ions to nanoparticles in a single-step green synthesis route. The formation of the AgNPs was characterized using UV-visible (UV-vis) spectroscopy, X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), energy- dispersive X-ray analysis (EDX), Fast Fourier Transform (FFT), and high-resolution transmission electron microscopy (HR-TEM)...
August 16, 2018: Journal of Photochemistry and Photobiology. B, Biology
Katrine Togsverd-Bo, Peter Alshede Philipsen, Merete Haedersdal, Hans Christian Wulf
BACKGROUND: Skin autofluorescence and pigmentation can estimate photodamage and sun exposure. These techniques may quantify differences in actinic damage between high-risk organ transplant recipients (OTRs) and immunocompetent patients. METHODS: Age and gender-matched OTRs (n = 15) and immunocompetent controls (n = 15) with a new keratinocyte carcinoma (KC) were included. We measured skin autofluorescence (370 nm excitation, F370) and skin pigmentation at five standardized body sites; and determined black light-evaluated solar lentigines on the shoulders and photosensitivity to UVA and simulated solar radiation (SSR) as minimal erythema doses (MED)...
August 9, 2018: Journal of Photochemistry and Photobiology. B, Biology
Yongtao Gao, Xiaobing Chen, Honglin Liu
A prospective resource of pharmacological treatment of ischemic brains stroke is rapid interference using potential neuroprotective materials. Cerium oxide nanoparticles have been shown to defend against blood brain barrier damage in cerebral ischemic brain stroke. While cerium oxide nanoparticles is highly permeable across the blood-brain barrier and also these nanoparticles are effective antioxidants, due to its ability to either donate or obtain electrons with alternative +3 and +4 valence states. This oxidation state of cerium oxide has shown efficiency in neutralizing generated free radicals in biological systems has been explored action for cerebral ischemic brain stroke...
October 2018: Journal of Photochemistry and Photobiology. B, Biology
Yan Wang, Ruichun Xia, Hao Hu, Tao Peng
The present work showed the biofabrication and characterization of gold nanoparticles (Au NPs) using Coccinia grandis bark extract. The fabricated NPs were well characterized by using different microscopic an spectroscopic techniques such as transmission electron microscopy (TEM), Ultra violet - visible spectroscopy (UV-Vis), X-ray diffraction (XRD), Energy dispersive spectroscopy (EDS) and Fourier transform spectroscopy (FTIR). TEM results showed that the prepared AuNPs are spherical in shape with uniformity in size...
October 2018: Journal of Photochemistry and Photobiology. B, Biology
D A Gvozdev, E G Maksimov, M G Strakhovskaya, A M Moysenovich, A A Ramonova, M M Moisenovich, S N Goryachev, V Z Paschenko, A B Rubin
Enhancement of optical properties of photosensitizers by additional light-harvesting antennas is promising for the improvement of the photodynamic therapy. However, large number of parameters determine interactions of nanoparticles and photosensitizers in complex and, thus the photodynamic efficacy of the hybrid structure. In order to achieve high efficiency of energetic coupling and photodynamic activity of such complexes it is important to know the location of the photosensitizer molecule on the nanoparticle, because it affects the spectral properties of the photosensitizer and the stability of the hybrid complex in vitro/in vivo...
October 2018: Journal of Photochemistry and Photobiology. B, Biology
R Sangeetha, D Madheswari, G Priya
A new biocomposite including Poly (methyl methacrylate)/Ce-Cu substituted apatite/Egg white (Ovalbumin) (PMMA/MHAP/EW) has been effectively manufactured via lyophilization technique. The reason to plan such biocomposite is to investigate for a perfect simple which may bio-imitate the constitution of natural bone for hard tissue designing regarding appropriate biodegradability, biocompatibility, and bactericidal properties. The FTIR and XRD spectra of prepared biocomposite showed the considerable intermolecular interface between the different constituents of the biocomposites...
October 2018: Journal of Photochemistry and Photobiology. B, Biology
Hua Qiao, Bo Li, Huichao Zhang, Dan Liu, Haipeng Diao, Gongqin Sun, Jun Xie
Liposomes are a common delivery vehicle for drugs or biologicals, but some common surfactants used as liposome components may cause denaturation and malfunction of serum proteins and cell surface proteins. In this study, we examined the effects of liposome lipid didodecyldimethylammonium bromide (DDAB), nonionic polyoxyethylene sorbitan monooleate 80 (Tween 80), and the equimolar mixture on the properties of serum proteins. Bovine serum albumin was selected as the main model protein, and the effects of the DDAB, Tween 80, and a 1:1 mixture on its spectroscopic behavior were investigated...
October 2018: Journal of Photochemistry and Photobiology. B, Biology
Adnan Zahir, Waqar Ahmad, Muhammad Nadeem, Nathalie Giglioli-Guivarc'h, Christophe Hano, Bilal Haider Abbasi
The multipurpose plant species Linum usitatissimum famous for producing linen fibre and containing valuable pharmacologically active polyphenols, has rarely been tested for it's in vitro biosynthesis potential of lignans and neolignans. The current study aims at the synergistic effects of mineral nutrients variation and different photoperiod treatments on growth kinetics and biomass accumulation in in vitro cultures of Linum usitatissimum. Both nutrient quality and quantity affected growth patterns, as cultures established on Gamborg B5 medium had comparatively long exponential phase compared to Murashige and Skoog medium, while growth was slow but steady until last phases of the culture on Schenk and Hildebrandt medium...
October 2018: Journal of Photochemistry and Photobiology. B, Biology
Toru Kanbayashi, Yutaka Kataoka, Atsuko Ishikawa, Masahiro Matsunaga, Masahiko Kobayashi, Makoto Kiguchi
Weathering leads to rapid depolymerization and modification of wood chemical components. The present study aims to assess the structural and distributional changes in the main wood polymers, such as lignin and polysaccharides, located in the surface layers during weathering exposure. A confocal Raman microscopic technique, which is useful for evaluating the structure of molecules with a high spatial resolution, was utilized to examine the effects of weathering on the chemical composition of wood surfaces at the cellular level...
October 2018: Journal of Photochemistry and Photobiology. B, Biology
Ben Allan Russell, Barbara Jachimska, Yu Chen
Protein encapsulated gold nanoclusters have received much attention due to the possibility of using them as a non-toxic fluorescent probe or marker for biomedical applications, however one major disadvantage currently is their low brightness and quantum yield in comparison to currently used fluorescent markers. A method of increasing the fluorescence emission of Human Serum Albumin (HSA) encapsulated gold nanoclusters (AuNCs) via a Polyallylamide hydrochloride (PAH) coating is described. PAH molecules with a molecular weight of ~17,500 Da were found to enhance the fluorescence emission of HSA-AuNCs by 3-fold when the protein/polymer concentration ratio is 2:1 in solution...
October 2018: Journal of Photochemistry and Photobiology. B, Biology
Rosaria Grasso, Marisa Gulino, Francesco Giuffrida, Michele Agnello, Francesco Musumeci, Agata Scordino
The evaluation of optical properties of biological samples is gaining increasing interests both in scientific and commercial fields concerning agriculture and food processing. The optical techniques can indeed be able to provide information on quality assessment in a fast and non-destructive way. This feature makes them suitable for automatic management of control processes. In this paper, we propose to use the Delayed Luminescence, a ultra-weak and photo-induced emission of optical photons, as a tool for a rapid evaluation of germination performance, the principal index reflecting seed quality...
October 2018: Journal of Photochemistry and Photobiology. B, Biology
Fanlei Kong, Zhihong Nie, Zhongpo Liu, Shibin Hou, Jiangfeng Ji
The technique of anterior cervical corpectomy and fusion (ACCF) for strut grafting has become a widespread and actively applied for many cervical complaints including cervical degeneration of the intervertebral disks, cervical trauma, cancer, rheumatoid arthritis and multilevel cervical spondylotic diseases. To avoid the complications of the old techniques, the construct stability and long anterior screw-plate designs of the bone strut have been improved by using effective biomaterials. The nanostructured hydroxyapatite (HAp) incorporated with biocompatible polymer matrixes is an effective biomedical material and creating a functional properties applied for different tissue replacements such as dental, hips, knees, tendon and ligaments and tissue repair for maxillofacial reconstruction, stabilization of the jaw bone and spinal fusion...
October 2018: Journal of Photochemistry and Photobiology. B, Biology
Umair Baig, M A Gondal, M A Dastageer, A B Khalil, S M Zubair
Sulfate reducing bacteria (SRB) wreaks havoc in the oil industry by being an agent for oil souring and building corrosion in pipelines and thereby degrade the quality of crude oil. Palladium nanoparticles decorated silicon carbide nanomaterial (Pd-SiC) was synthesized by a facile single step synthesis process and this nanomaterial as a photo-catalyst, as compared to pure silicon carbide (SiC) nanoparticles showed a significant enhancement in the photo-catalytic efficiency in the process of the photo-catalytic deactivation of hazardous SRB...
October 2018: Journal of Photochemistry and Photobiology. B, Biology
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